2 * Copyright (c) 2018 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vnet/session/application_interface.h>
17 #include <vppinfra/lock.h>
18 #include <vnet/tls/tls.h>
20 static tls_main_t tls_main;
21 static tls_engine_vft_t *tls_vfts;
23 #define TLS_INVALID_HANDLE ~0
24 #define TLS_IDX_MASK 0x00FFFFFF
25 #define TLS_ENGINE_TYPE_SHIFT 29
27 void tls_disconnect (u32 ctx_handle, u32 thread_index);
30 tls_get_available_engine (void)
33 for (i = 0; i < vec_len (tls_vfts); i++)
35 if (tls_vfts[i].ctx_alloc)
38 return TLS_ENGINE_NONE;
42 tls_add_vpp_q_evt (svm_fifo_t * f, u8 evt_type)
44 session_fifo_event_t evt;
47 if (svm_fifo_set_event (f))
50 evt.event_type = evt_type;
52 q = session_manager_get_vpp_event_queue (f->master_thread_index);
53 if (PREDICT_TRUE (q->cursize < q->maxsize))
55 svm_queue_add (q, (u8 *) & evt, 0 /* do wait for mutex */ );
59 clib_warning ("vpp's evt q full");
67 tls_add_app_q_evt (application_t * app, stream_session_t * app_session)
69 session_fifo_event_t evt;
72 if (PREDICT_FALSE (app_session->session_state == SESSION_STATE_CLOSED))
74 /* Session is closed so app will never clean up. Flush rx fifo */
75 u32 to_dequeue = svm_fifo_max_dequeue (app_session->server_rx_fifo);
77 svm_fifo_dequeue_drop (app_session->server_rx_fifo, to_dequeue);
81 if (app->cb_fns.builtin_app_rx_callback)
82 return app->cb_fns.builtin_app_rx_callback (app_session);
84 if (svm_fifo_set_event (app_session->server_rx_fifo))
86 evt.fifo = app_session->server_rx_fifo;
87 evt.event_type = FIFO_EVENT_APP_RX;
90 if (PREDICT_TRUE (q->cursize < q->maxsize))
92 svm_queue_add (q, (u8 *) & evt, 0 /* do wait for mutex */ );
96 clib_warning ("app evt q full");
104 tls_listener_ctx_alloc (void)
106 tls_main_t *tm = &tls_main;
109 pool_get (tm->listener_ctx_pool, ctx);
110 memset (ctx, 0, sizeof (*ctx));
111 return ctx - tm->listener_ctx_pool;
115 tls_listener_ctx_free (tls_ctx_t * ctx)
117 pool_put (tls_main.listener_ctx_pool, ctx);
121 tls_listener_ctx_get (u32 ctx_index)
123 return pool_elt_at_index (tls_main.listener_ctx_pool, ctx_index);
127 tls_listener_ctx_index (tls_ctx_t * ctx)
129 return (ctx - tls_main.listener_ctx_pool);
133 tls_ctx_half_open_alloc (void)
135 tls_main_t *tm = &tls_main;
140 pool_get_aligned_will_expand (tm->half_open_ctx_pool, will_expand, 0);
141 if (PREDICT_FALSE (will_expand && vlib_num_workers ()))
143 clib_rwlock_writer_lock (&tm->half_open_rwlock);
144 pool_get (tm->half_open_ctx_pool, ctx);
145 memset (ctx, 0, sizeof (*ctx));
146 ctx_index = ctx - tm->half_open_ctx_pool;
147 clib_rwlock_writer_unlock (&tm->half_open_rwlock);
151 pool_get (tm->half_open_ctx_pool, ctx);
152 memset (ctx, 0, sizeof (*ctx));
153 ctx_index = ctx - tm->half_open_ctx_pool;
159 tls_ctx_half_open_free (u32 ho_index)
161 tls_main_t *tm = &tls_main;
162 clib_rwlock_writer_lock (&tm->half_open_rwlock);
163 pool_put_index (tls_main.half_open_ctx_pool, ho_index);
164 clib_rwlock_writer_unlock (&tm->half_open_rwlock);
168 tls_ctx_half_open_get (u32 ctx_index)
170 tls_main_t *tm = &tls_main;
171 clib_rwlock_reader_lock (&tm->half_open_rwlock);
172 return pool_elt_at_index (tm->half_open_ctx_pool, ctx_index);
176 tls_ctx_half_open_reader_unlock ()
178 clib_rwlock_reader_unlock (&tls_main.half_open_rwlock);
182 tls_ctx_half_open_index (tls_ctx_t * ctx)
184 return (ctx - tls_main.half_open_ctx_pool);
188 tls_notify_app_enqueue (tls_ctx_t * ctx, stream_session_t * app_session)
191 app = application_get_if_valid (app_session->app_index);
192 if (PREDICT_TRUE (app != 0))
193 tls_add_app_q_evt (app, app_session);
197 tls_notify_app_accept (tls_ctx_t * ctx)
199 stream_session_t *app_listener, *app_session;
200 segment_manager_t *sm;
205 app = application_get (ctx->parent_app_index);
206 lctx = tls_listener_ctx_get (ctx->listener_ctx_index);
207 app_listener = listen_session_get_from_handle (lctx->app_session_handle);
208 sm = application_get_listen_segment_manager (app, app_listener);
210 app_session = session_alloc (vlib_get_thread_index ());
211 app_session->app_index = ctx->parent_app_index;
212 app_session->connection_index = ctx->tls_ctx_handle;
213 app_session->session_type = app_listener->session_type;
214 app_session->listener_index = app_listener->session_index;
215 if ((rv = session_alloc_fifos (sm, app_session)))
217 TLS_DBG (1, "failed to allocate fifos");
220 ctx->c_s_index = app_session->session_index;
221 ctx->app_session_handle = session_handle (app_session);
222 return app->cb_fns.session_accept_callback (app_session);
226 tls_notify_app_connected (tls_ctx_t * ctx, u8 is_failed)
228 int (*cb_fn) (u32, u32, stream_session_t *, u8);
229 stream_session_t *app_session;
230 segment_manager_t *sm;
233 app = application_get (ctx->parent_app_index);
234 cb_fn = app->cb_fns.session_connected_callback;
239 sm = application_get_connect_segment_manager (app);
240 app_session = session_alloc (vlib_get_thread_index ());
241 app_session->app_index = ctx->parent_app_index;
242 app_session->connection_index = ctx->tls_ctx_handle;
243 app_session->session_type =
244 session_type_from_proto_and_ip (TRANSPORT_PROTO_TLS, ctx->tcp_is_ip4);
245 if (session_alloc_fifos (sm, app_session))
248 ctx->app_session_handle = session_handle (app_session);
249 ctx->c_s_index = app_session->session_index;
250 app_session->session_state = SESSION_STATE_READY;
251 if (cb_fn (ctx->parent_app_index, ctx->parent_app_api_context,
252 app_session, 0 /* not failed */ ))
254 TLS_DBG (1, "failed to notify app");
255 tls_disconnect (ctx->tls_ctx_handle, vlib_get_thread_index ());
261 tls_disconnect (ctx->tls_ctx_handle, vlib_get_thread_index ());
262 return cb_fn (ctx->parent_app_index, ctx->parent_app_api_context, 0,
267 tls_ctx_parse_handle (u32 ctx_handle, u32 * ctx_index, u32 * engine_type)
269 *ctx_index = ctx_handle & TLS_IDX_MASK;
270 *engine_type = ctx_handle >> TLS_ENGINE_TYPE_SHIFT;
273 static inline tls_engine_type_t
274 tls_get_engine_type (tls_engine_type_t preferred)
276 if (!tls_vfts[preferred].ctx_alloc)
277 return tls_get_available_engine ();
282 tls_ctx_alloc (tls_engine_type_t engine_type)
285 ctx_index = tls_vfts[engine_type].ctx_alloc ();
286 return (((u32) engine_type << TLS_ENGINE_TYPE_SHIFT) | ctx_index);
290 tls_ctx_free (tls_ctx_t * ctx)
292 vec_free (ctx->srv_hostname);
293 tls_vfts[ctx->tls_ctx_engine].ctx_free (ctx);
296 static inline tls_ctx_t *
297 tls_ctx_get (u32 ctx_handle)
299 u32 ctx_index, engine_type;
300 tls_ctx_parse_handle (ctx_handle, &ctx_index, &engine_type);
301 return tls_vfts[engine_type].ctx_get (ctx_index);
304 static inline tls_ctx_t *
305 tls_ctx_get_w_thread (u32 ctx_handle, u8 thread_index)
307 u32 ctx_index, engine_type;
308 tls_ctx_parse_handle (ctx_handle, &ctx_index, &engine_type);
309 return tls_vfts[engine_type].ctx_get_w_thread (ctx_index, thread_index);
313 tls_ctx_init_server (tls_ctx_t * ctx)
315 return tls_vfts[ctx->tls_ctx_engine].ctx_init_server (ctx);
319 tls_ctx_init_client (tls_ctx_t * ctx)
321 return tls_vfts[ctx->tls_ctx_engine].ctx_init_client (ctx);
325 tls_ctx_write (tls_ctx_t * ctx, stream_session_t * app_session)
327 return tls_vfts[ctx->tls_ctx_engine].ctx_write (ctx, app_session);
331 tls_ctx_read (tls_ctx_t * ctx, stream_session_t * tls_session)
333 return tls_vfts[ctx->tls_ctx_engine].ctx_read (ctx, tls_session);
337 tls_ctx_handshake_is_over (tls_ctx_t * ctx)
339 return tls_vfts[ctx->tls_ctx_engine].ctx_handshake_is_over (ctx);
343 tls_session_reset_callback (stream_session_t * s)
345 clib_warning ("called...");
349 tls_add_segment_callback (u32 client_index, const ssvm_private_t * fs)
351 /* No-op for builtin */
356 tls_del_segment_callback (u32 client_index, const ssvm_private_t * fs)
362 tls_session_disconnect_callback (stream_session_t * tls_session)
364 stream_session_t *app_session;
368 ctx = tls_ctx_get (tls_session->opaque);
369 if (!tls_ctx_handshake_is_over (ctx))
371 stream_session_disconnect (tls_session);
374 ctx->is_passive_close = 1;
375 app = application_get (ctx->parent_app_index);
376 app_session = session_get_from_handle (ctx->app_session_handle);
377 app->cb_fns.session_disconnect_callback (app_session);
381 tls_session_accept_callback (stream_session_t * tls_session)
383 stream_session_t *tls_listener;
384 tls_ctx_t *lctx, *ctx;
387 tls_listener = listen_session_get (tls_session->listener_index);
388 lctx = tls_listener_ctx_get (tls_listener->opaque);
390 ctx_handle = tls_ctx_alloc (lctx->tls_ctx_engine);
391 ctx = tls_ctx_get (ctx_handle);
392 memcpy (ctx, lctx, sizeof (*lctx));
393 ctx->c_thread_index = vlib_get_thread_index ();
394 ctx->tls_ctx_handle = ctx_handle;
395 tls_session->session_state = SESSION_STATE_READY;
396 tls_session->opaque = ctx_handle;
397 ctx->tls_session_handle = session_handle (tls_session);
398 ctx->listener_ctx_index = tls_listener->opaque;
400 TLS_DBG (1, "Accept on listener %u new connection [%u]%x",
401 tls_listener->opaque, vlib_get_thread_index (), ctx_handle);
403 return tls_ctx_init_server (ctx);
407 tls_app_tx_callback (stream_session_t * app_session)
410 if (PREDICT_FALSE (app_session->session_state == SESSION_STATE_CLOSED))
412 ctx = tls_ctx_get (app_session->connection_index);
413 tls_ctx_write (ctx, app_session);
418 tls_app_rx_callback (stream_session_t * tls_session)
422 ctx = tls_ctx_get (tls_session->opaque);
423 tls_ctx_read (ctx, tls_session);
428 tls_session_connected_callback (u32 tls_app_index, u32 ho_ctx_index,
429 stream_session_t * tls_session, u8 is_fail)
431 int (*cb_fn) (u32, u32, stream_session_t *, u8);
433 tls_ctx_t *ho_ctx, *ctx;
436 ho_ctx = tls_ctx_half_open_get (ho_ctx_index);
437 app = application_get (ho_ctx->parent_app_index);
438 cb_fn = app->cb_fns.session_connected_callback;
442 tls_ctx_half_open_reader_unlock ();
443 tls_ctx_half_open_free (ho_ctx_index);
444 return cb_fn (ho_ctx->parent_app_index, ho_ctx->c_s_index, 0,
448 ctx_handle = tls_ctx_alloc (ho_ctx->tls_ctx_engine);
449 ctx = tls_ctx_get (ctx_handle);
450 clib_memcpy (ctx, ho_ctx, sizeof (*ctx));
451 tls_ctx_half_open_reader_unlock ();
452 tls_ctx_half_open_free (ho_ctx_index);
454 ctx->c_thread_index = vlib_get_thread_index ();
455 ctx->tls_ctx_handle = ctx_handle;
457 TLS_DBG (1, "TCP connect for %u returned %u. New connection [%u]%x",
458 ho_ctx_index, is_fail, vlib_get_thread_index (),
459 (ctx) ? ctx_handle : ~0);
461 ctx->tls_session_handle = session_handle (tls_session);
462 tls_session->opaque = ctx_handle;
463 tls_session->session_state = SESSION_STATE_READY;
465 return tls_ctx_init_client (ctx);
469 static session_cb_vft_t tls_app_cb_vft = {
470 .session_accept_callback = tls_session_accept_callback,
471 .session_disconnect_callback = tls_session_disconnect_callback,
472 .session_connected_callback = tls_session_connected_callback,
473 .session_reset_callback = tls_session_reset_callback,
474 .add_segment_callback = tls_add_segment_callback,
475 .del_segment_callback = tls_del_segment_callback,
476 .builtin_app_rx_callback = tls_app_rx_callback,
477 .builtin_app_tx_callback = tls_app_tx_callback,
482 tls_connect (transport_endpoint_t * tep)
484 session_endpoint_extended_t *sep;
485 tls_engine_type_t engine_type;
486 session_endpoint_t tls_sep;
487 tls_main_t *tm = &tls_main;
493 sep = (session_endpoint_extended_t *) tep;
494 app = application_get (sep->app_index);
495 engine_type = tls_get_engine_type (app->tls_engine);
496 if (engine_type == TLS_ENGINE_NONE)
498 clib_warning ("No tls engine_type available");
502 ctx_index = tls_ctx_half_open_alloc ();
503 ctx = tls_ctx_half_open_get (ctx_index);
504 ctx->parent_app_index = sep->app_index;
505 ctx->parent_app_api_context = sep->opaque;
506 ctx->tcp_is_ip4 = sep->is_ip4;
509 ctx->srv_hostname = format (0, "%v", sep->hostname);
510 vec_terminate_c_string (ctx->srv_hostname);
512 tls_ctx_half_open_reader_unlock ();
514 application_alloc_connects_segment_manager (app);
515 ctx->tls_ctx_engine = engine_type;
517 clib_memcpy (&tls_sep, sep, sizeof (tls_sep));
518 tls_sep.transport_proto = TRANSPORT_PROTO_TCP;
519 if ((rv = application_connect (tm->app_index, ctx_index, &tls_sep)))
522 TLS_DBG (1, "New connect request %u engine %d", ctx_index, engine_type);
527 tls_disconnect (u32 ctx_handle, u32 thread_index)
529 stream_session_t *tls_session, *app_session;
532 TLS_DBG (1, "Disconnecting %x", ctx_handle);
534 ctx = tls_ctx_get (ctx_handle);
535 tls_session = session_get_from_handle (ctx->tls_session_handle);
536 stream_session_disconnect (tls_session);
538 app_session = session_get_from_handle_if_valid (ctx->app_session_handle);
541 segment_manager_dealloc_fifos (app_session->svm_segment_index,
542 app_session->server_rx_fifo,
543 app_session->server_tx_fifo);
544 session_free (app_session);
550 tls_start_listen (u32 app_listener_index, transport_endpoint_t * tep)
552 tls_main_t *tm = &tls_main;
553 application_t *tls_app, *app;
554 session_handle_t tls_handle;
555 session_endpoint_extended_t *sep;
556 stream_session_t *tls_listener;
559 stream_session_t *app_listener;
560 tls_engine_type_t engine_type;
562 sep = (session_endpoint_extended_t *) tep;
563 app = application_get (sep->app_index);
564 engine_type = tls_get_engine_type (app->tls_engine);
565 if (engine_type == TLS_ENGINE_NONE)
567 clib_warning ("No tls engine_type available");
571 lctx_index = tls_listener_ctx_alloc ();
573 tls_app = application_get (tm->app_index);
574 sep->transport_proto = TRANSPORT_PROTO_TCP;
575 if (application_start_listen (tls_app, (session_endpoint_t *) sep,
579 tls_listener = listen_session_get_from_handle (tls_handle);
580 tls_listener->opaque = lctx_index;
582 app_listener = listen_session_get (app_listener_index);
584 lctx = tls_listener_ctx_get (lctx_index);
585 lctx->parent_app_index = sep->app_index;
586 lctx->tls_session_handle = tls_handle;
587 lctx->app_session_handle = listen_session_get_handle (app_listener);
588 lctx->tcp_is_ip4 = sep->is_ip4;
589 lctx->tls_ctx_engine = engine_type;
591 TLS_DBG (1, "Started listening %d, engine type %d", lctx_index,
597 tls_stop_listen (u32 lctx_index)
599 tls_main_t *tm = &tls_main;
600 application_t *tls_app;
602 lctx = tls_listener_ctx_get (lctx_index);
603 tls_app = application_get (tm->app_index);
604 application_stop_listen (tls_app, lctx->tls_session_handle);
605 tls_listener_ctx_free (lctx);
609 transport_connection_t *
610 tls_connection_get (u32 ctx_index, u32 thread_index)
613 ctx = tls_ctx_get_w_thread (ctx_index, thread_index);
614 return &ctx->connection;
617 transport_connection_t *
618 tls_listener_get (u32 listener_index)
621 ctx = tls_listener_ctx_get (listener_index);
622 return &ctx->connection;
626 format_tls_ctx (u8 * s, va_list * args)
628 tls_ctx_t *ctx = va_arg (*args, tls_ctx_t *);
629 u32 thread_index = va_arg (*args, u32);
630 u32 child_si, child_ti;
632 session_parse_handle (ctx->tls_session_handle, &child_si, &child_ti);
633 if (thread_index != child_ti)
634 clib_warning ("app and tls sessions are on different threads!");
636 s = format (s, "[#%d][TLS] app %u child %u", child_ti,
637 ctx->parent_app_index, child_si);
642 format_tls_connection (u8 * s, va_list * args)
644 u32 ctx_index = va_arg (*args, u32);
645 u32 thread_index = va_arg (*args, u32);
646 u32 verbose = va_arg (*args, u32);
649 ctx = tls_ctx_get_w_thread (ctx_index, thread_index);
653 s = format (s, "%-50U", format_tls_ctx, ctx, thread_index);
656 s = format (s, "%-15s", "state");
658 s = format (s, "\n");
664 format_tls_listener (u8 * s, va_list * args)
666 u32 tc_index = va_arg (*args, u32);
667 tls_ctx_t *ctx = tls_listener_ctx_get (tc_index);
668 u32 listener_index, thread_index;
670 listen_session_parse_handle (ctx->tls_session_handle, &listener_index,
672 return format (s, "[TLS] listener app %u child %u", ctx->parent_app_index,
677 format_tls_half_open (u8 * s, va_list * args)
679 u32 tc_index = va_arg (*args, u32);
680 tls_ctx_t *ctx = tls_ctx_half_open_get (tc_index);
681 s = format (s, "[TLS] half-open app %u", ctx->parent_app_index);
682 tls_ctx_half_open_reader_unlock ();
687 const static transport_proto_vft_t tls_proto = {
689 .close = tls_disconnect,
690 .bind = tls_start_listen,
691 .get_connection = tls_connection_get,
692 .get_listener = tls_listener_get,
693 .unbind = tls_stop_listen,
694 .tx_type = TRANSPORT_TX_INTERNAL,
695 .service_type = TRANSPORT_SERVICE_APP,
696 .format_connection = format_tls_connection,
697 .format_half_open = format_tls_half_open,
698 .format_listener = format_tls_listener,
703 tls_register_engine (const tls_engine_vft_t * vft, tls_engine_type_t type)
705 vec_validate (tls_vfts, type);
706 tls_vfts[type] = *vft;
709 static clib_error_t *
710 tls_init (vlib_main_t * vm)
712 vlib_thread_main_t *vtm = vlib_get_thread_main ();
713 vnet_app_attach_args_t _a, *a = &_a;
714 u64 options[APP_OPTIONS_N_OPTIONS];
715 u32 segment_size = 512 << 20;
716 tls_main_t *tm = &tls_main;
717 u32 fifo_size = 64 << 10;
720 num_threads = 1 /* main thread */ + vtm->n_threads;
722 memset (a, 0, sizeof (*a));
723 memset (options, 0, sizeof (options));
725 a->session_cb_vft = &tls_app_cb_vft;
726 a->api_client_index = APP_INVALID_INDEX;
727 a->options = options;
728 a->name = format (0, "tls");
729 a->options[APP_OPTIONS_SEGMENT_SIZE] = segment_size;
730 a->options[APP_OPTIONS_RX_FIFO_SIZE] = fifo_size;
731 a->options[APP_OPTIONS_TX_FIFO_SIZE] = fifo_size;
732 a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN;
733 a->options[APP_OPTIONS_FLAGS] |= APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE;
735 if (vnet_application_attach (a))
737 clib_warning ("failed to attach tls app");
738 return clib_error_return (0, "failed to attach tls app");
741 if (!tm->ca_cert_path)
742 tm->ca_cert_path = TLS_CA_CERT_PATH;
744 tm->app_index = a->app_index;
745 clib_rwlock_init (&tm->half_open_rwlock);
747 vec_validate (tm->rx_bufs, num_threads - 1);
748 vec_validate (tm->tx_bufs, num_threads - 1);
750 transport_register_protocol (TRANSPORT_PROTO_TLS, &tls_proto,
751 FIB_PROTOCOL_IP4, ~0);
752 transport_register_protocol (TRANSPORT_PROTO_TLS, &tls_proto,
753 FIB_PROTOCOL_IP6, ~0);
758 VLIB_INIT_FUNCTION (tls_init);
760 static clib_error_t *
761 tls_config_fn (vlib_main_t * vm, unformat_input_t * input)
763 tls_main_t *tm = &tls_main;
764 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
766 if (unformat (input, "use-test-cert-in-ca"))
767 tm->use_test_cert_in_ca = 1;
768 else if (unformat (input, "ca-cert-path %s", &tm->ca_cert_path))
771 return clib_error_return (0, "unknown input `%U'",
772 format_unformat_error, input);
777 VLIB_EARLY_CONFIG_FUNCTION (tls_config_fn, "tls");
780 vnet_tls_get_main (void)
786 * fd.io coding-style-patch-verification: ON
789 * eval: (c-set-style "gnu")