2 * Copyright (c) 2021 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 <srtp/srtp.h>
17 #include <vnet/session/application_interface.h>
18 #include <vnet/session/session.h>
20 static srtp_main_t srtp_main;
22 static void srtp_disconnect (u32 ctx_handle, u32 thread_index);
23 static void srtp_disconnect_transport (srtp_tc_t *ctx);
26 srtp_ctx_alloc_w_thread (u32 thread_index)
29 pool_get_zero (srtp_main.ctx_pool[thread_index], ctx);
30 ctx->c_thread_index = thread_index;
31 ctx->srtp_ctx_handle = ctx - srtp_main.ctx_pool[thread_index];
32 ctx->app_session_handle = SESSION_INVALID_HANDLE;
33 return ctx->srtp_ctx_handle;
36 static inline srtp_tc_t *
37 srtp_ctx_get_w_thread (u32 ctx_index, u32 thread_index)
39 return pool_elt_at_index (srtp_main.ctx_pool[thread_index], ctx_index);
43 srtp_init_policy (srtp_tc_t *ctx, transport_endpt_cfg_srtp_t *cfg)
45 transport_endpt_cfg_srtp_policy_t *sp_cfg;
49 for (i = 0; i < 2; i++)
51 sp = &ctx->srtp_policy[i];
52 sp_cfg = &cfg->policies[i];
54 srtp_crypto_policy_set_rtp_default (&sp->rtp);
55 srtp_crypto_policy_set_rtcp_default (&sp->rtcp);
56 sp->ssrc.type = sp_cfg->ssrc_type;
57 sp->ssrc.value = sp_cfg->ssrc_value;
58 sp->key = clib_mem_alloc (sp_cfg->key_len);
59 clib_memcpy (sp->key, sp_cfg->key, sp_cfg->key_len);
61 sp->next = i < 1 ? &ctx->srtp_policy[i + 1] : 0;
62 sp->window_size = sp_cfg->window_size;
63 sp->allow_repeat_tx = sp_cfg->allow_repeat_tx;
68 srtp_ctx_free_policy (srtp_tc_t *ctx)
70 clib_mem_free (ctx->srtp_policy[0].key);
71 clib_mem_free (ctx->srtp_policy[1].key);
75 srtp_ctx_free (srtp_tc_t *ctx)
77 if (!ctx->is_migrated)
78 srtp_ctx_free_policy (ctx);
79 pool_put (srtp_main.ctx_pool[ctx->c_thread_index], ctx);
83 srtp_ctx_attach (u32 thread_index, void *ctx_ptr)
87 pool_get (srtp_main.ctx_pool[thread_index], ctx);
88 clib_memcpy (ctx, ctx_ptr, sizeof (*ctx));
90 ctx->c_thread_index = thread_index;
91 ctx->srtp_ctx_handle = ctx - srtp_main.ctx_pool[thread_index];
96 srtp_ctx_detach (srtp_tc_t *ctx)
100 sc = clib_mem_alloc (sizeof (*sc));
101 clib_memcpy (sc, ctx, sizeof (*sc));
107 srtp_listener_ctx_alloc (void)
109 srtp_main_t *sm = &srtp_main;
112 pool_get_zero (sm->listener_ctx_pool, ctx);
113 return ctx - sm->listener_ctx_pool;
117 srtp_listener_ctx_free (srtp_tc_t *ctx)
119 srtp_ctx_free_policy (ctx);
121 clib_memset (ctx, 0xfb, sizeof (*ctx));
122 pool_put (srtp_main.listener_ctx_pool, ctx);
126 srtp_listener_ctx_get (u32 ctx_index)
128 return pool_elt_at_index (srtp_main.listener_ctx_pool, ctx_index);
132 srtp_listener_ctx_index (srtp_tc_t *ctx)
134 return (ctx - srtp_main.listener_ctx_pool);
138 srtp_ctx_init_client (srtp_tc_t *ctx)
140 session_t *app_session;
141 app_worker_t *app_wrk;
144 if (srtp_create (&ctx->srtp_ctx, &ctx->srtp_policy[0]) != srtp_err_status_ok)
146 SRTP_DBG (0, "failed to init srtp ctx");
150 app_wrk = app_worker_get (ctx->parent_app_wrk_index);
151 app_session = session_get (ctx->c_s_index, ctx->c_thread_index);
152 app_session->app_wrk_index = ctx->parent_app_wrk_index;
153 app_session->connection_index = ctx->srtp_ctx_handle;
154 app_session->session_type =
155 session_type_from_proto_and_ip (TRANSPORT_PROTO_SRTP, ctx->udp_is_ip4);
157 if ((err = app_worker_init_connected (app_wrk, app_session)))
160 app_session->session_state = SESSION_STATE_READY;
161 if (app_worker_connect_notify (app_wrk, app_session, SESSION_E_NONE,
162 ctx->parent_app_api_context))
164 SRTP_DBG (0, "failed to notify app");
165 app_session->session_state = SESSION_STATE_CONNECTING;
166 srtp_disconnect (ctx->srtp_ctx_handle, vlib_get_thread_index ());
170 ctx->app_session_handle = session_handle (app_session);
175 /* Free app session pre-allocated when transport was established */
176 session_free (session_get (ctx->c_s_index, ctx->c_thread_index));
177 ctx->no_app_session = 1;
178 srtp_disconnect (ctx->srtp_ctx_handle, vlib_get_thread_index ());
179 return app_worker_connect_notify (app_wrk, 0, err,
180 ctx->parent_app_api_context);
184 srtp_ctx_init_server (srtp_tc_t *ctx)
186 session_t *app_listener, *app_session;
187 app_worker_t *app_wrk;
191 if (srtp_create (&ctx->srtp_ctx, ctx->srtp_policy) != srtp_err_status_ok)
194 lctx = srtp_listener_ctx_get (ctx->listener_ctx_index);
195 app_listener = listen_session_get_from_handle (lctx->app_session_handle);
197 app_session = session_get (ctx->c_s_index, ctx->c_thread_index);
198 app_session->app_wrk_index = ctx->parent_app_wrk_index;
199 app_session->connection_index = ctx->srtp_ctx_handle;
200 app_session->session_type = app_listener->session_type;
201 app_session->listener_handle = listen_session_get_handle (app_listener);
202 app_session->session_state = SESSION_STATE_ACCEPTING;
204 if ((rv = app_worker_init_accepted (app_session)))
206 SRTP_DBG (1, "failed to allocate fifos");
207 session_free (app_session);
210 ctx->app_session_handle = session_handle (app_session);
211 ctx->parent_app_wrk_index = app_session->app_wrk_index;
212 app_wrk = app_worker_get (app_session->app_wrk_index);
213 return app_worker_accept_notify (app_wrk, app_session);
217 srtp_ctx_deinit (srtp_tc_t *ctx)
219 if (srtp_dealloc (ctx->srtp_ctx))
220 SRTP_DBG (0, "%u failed to cleanup srtp state", ctx->c_c_index);
225 srtp_ctx_write (srtp_tc_t *ctx, session_t *app_session,
226 transport_send_params_t *sp)
228 u32 n_wrote = 0, to_deq, dgram_sz;
229 session_dgram_pre_hdr_t hdr;
230 app_session_transport_t at = {};
236 sp->max_burst_size = sp->max_burst_size * TRANSPORT_PACER_MIN_MSS;
238 us = session_get_from_handle (ctx->srtp_session_handle);
239 to_deq = svm_fifo_max_dequeue_cons (app_session->tx_fifo);
240 mq = session_main_get_vpp_event_queue (us->thread_index);
241 sp->bytes_dequeued = to_deq;
245 /* Peeking only pre-header dgram because the session is connected */
246 rv = svm_fifo_peek (app_session->tx_fifo, 0, sizeof (hdr), (u8 *) &hdr);
247 ASSERT (rv == sizeof (hdr) && hdr.data_length < 2000);
248 ASSERT (to_deq >= hdr.data_length + SESSION_CONN_HDR_LEN);
250 dgram_sz = hdr.data_length + SESSION_CONN_HDR_LEN;
251 if (svm_fifo_max_enqueue_prod (us->tx_fifo) < dgram_sz + 1000)
253 svm_fifo_add_want_deq_ntf (us->tx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
254 transport_connection_deschedule (&ctx->connection);
255 sp->flags |= TRANSPORT_SND_F_DESCHED;
259 rv = svm_fifo_peek (app_session->tx_fifo, SESSION_CONN_HDR_LEN,
260 hdr.data_length, buf);
261 ASSERT (rv == hdr.data_length);
262 svm_fifo_dequeue_drop (app_session->tx_fifo, dgram_sz);
266 rv = srtp_protect (ctx->srtp_ctx, buf, &len);
267 if (rv != srtp_err_status_ok)
269 SRTP_DBG (0, "failed to protect %u", rv);
273 rv = app_send_dgram_raw (us->tx_fifo, &at, mq, (u8 *) buf, len,
274 SESSION_IO_EVT_TX, 1 /* do_evt */,
284 if (svm_fifo_needs_deq_ntf (app_session->tx_fifo, n_wrote))
285 session_dequeue_notify (app_session);
289 if (svm_fifo_set_event (us->tx_fifo))
290 session_send_io_evt_to_thread (us->tx_fifo, SESSION_IO_EVT_TX);
293 if (PREDICT_FALSE (ctx->app_closed &&
294 !svm_fifo_max_enqueue_prod (us->rx_fifo)))
296 srtp_disconnect_transport (ctx);
297 session_transport_closed_notify (&ctx->connection);
300 ASSERT (sp->bytes_dequeued >= to_deq);
301 sp->bytes_dequeued -= to_deq;
303 return n_wrote > 0 ? clib_max (n_wrote / TRANSPORT_PACER_MIN_MSS, 1) : 0;
307 srtp_add_vpp_q_builtin_rx_evt (session_t *s)
309 if (svm_fifo_set_event (s->rx_fifo))
310 session_send_io_evt_to_thread (s->rx_fifo, SESSION_IO_EVT_BUILTIN_RX);
315 srtp_notify_app_enqueue (srtp_tc_t *ctx, session_t *app_session)
317 app_worker_t *app_wrk;
318 app_wrk = app_worker_get_if_valid (app_session->app_wrk_index);
319 if (PREDICT_TRUE (app_wrk != 0))
320 app_worker_lock_and_send_event (app_wrk, app_session, SESSION_IO_EVT_RX);
324 srtp_ctx_read (srtp_tc_t *ctx, session_t *us)
326 app_session_transport_t at;
327 session_dgram_hdr_t hdr;
328 session_t *app_session;
333 app_session = session_get_from_handle (ctx->app_session_handle);
334 svm_fifo_fill_chunk_list (app_session->rx_fifo);
336 while (svm_fifo_max_dequeue_cons (us->rx_fifo) > 0)
338 if (svm_fifo_max_enqueue_prod (app_session->rx_fifo) < 2000)
340 srtp_add_vpp_q_builtin_rx_evt (us);
344 rv = app_recv_dgram_raw (us->rx_fifo, (u8 *) buf, 2000, &at,
345 0 /* clear evt */, 0 /* peek */);
349 rv = srtp_unprotect (ctx->srtp_ctx, buf, &len);
351 if (rv != srtp_err_status_ok)
353 SRTP_DBG (0, "failed to unprotect %d", rv);
358 hdr.data_length = len;
361 svm_fifo_seg_t segs[2] = { { (u8 *) &hdr, sizeof (hdr) }, { buf, len } };
363 rv = svm_fifo_enqueue_segments (app_session->rx_fifo, segs, 2,
364 0 /* allow partial */);
370 srtp_notify_app_enqueue (ctx, app_session);
376 srtp_add_segment_callback (u32 client_index, u64 segment_handle)
378 /* No-op for builtin */
383 srtp_del_segment_callback (u32 client_index, u64 segment_handle)
389 srtp_session_disconnect_callback (session_t *us)
391 clib_warning ("udp %u disconnected?", us->session_index);
395 srtp_session_reset_callback (session_t *us)
397 clib_warning ("udp %u reset?", us->session_index);
401 srtp_session_connected_callback (u32 srtp_app_index, u32 ctx_handle,
402 session_t *us, session_error_t err)
404 session_t *app_session;
408 ctx = srtp_ctx_get_w_thread (ctx_handle, 1 /* udp allocs on thread 1 */);
410 ctx->srtp_session_handle = session_handle (us);
411 ctx->c_flags |= TRANSPORT_CONNECTION_F_NO_LOOKUP;
412 us->opaque = ctx_handle;
414 /* Preallocate app session. Avoids allocating a session on srtp_session rx
415 * and potentially invalidating the session pool */
416 app_session = session_alloc (ctx->c_thread_index);
417 app_session->session_state = SESSION_STATE_CREATED;
418 ctx->c_s_index = app_session->session_index;
420 st = session_type_from_proto_and_ip (TRANSPORT_PROTO_SRTP, ctx->udp_is_ip4);
421 app_session->session_type = st;
422 app_session->connection_index = ctx->srtp_ctx_handle;
424 return srtp_ctx_init_client (ctx);
428 srtp_session_accept_callback (session_t *us)
430 session_t *srtp_listener, *app_session;
431 srtp_tc_t *lctx, *ctx;
434 srtp_listener = listen_session_get_from_handle (us->listener_handle);
435 lctx = srtp_listener_ctx_get (srtp_listener->opaque);
437 ctx_handle = srtp_ctx_alloc_w_thread (us->thread_index);
438 ctx = srtp_ctx_get_w_thread (ctx_handle, us->thread_index);
439 clib_memcpy_fast (ctx, lctx, sizeof (*lctx));
440 ctx->c_thread_index = vlib_get_thread_index ();
441 ctx->srtp_ctx_handle = ctx_handle;
442 us->session_state = SESSION_STATE_READY;
443 us->opaque = ctx_handle;
444 ctx->srtp_session_handle = session_handle (us);
445 ctx->listener_ctx_index = srtp_listener->opaque;
446 ctx->c_flags |= TRANSPORT_CONNECTION_F_NO_LOOKUP;
448 ctx->srtp_policy[0].key = clib_mem_alloc (SRTP_MAX_KEYLEN);
449 clib_memcpy (ctx->srtp_policy[0].key, lctx->srtp_policy[0].key,
451 ctx->srtp_policy[1].key = clib_mem_alloc (SRTP_MAX_KEYLEN);
452 clib_memcpy (ctx->srtp_policy[1].key, lctx->srtp_policy[1].key,
455 app_session = session_alloc (ctx->c_thread_index);
456 app_session->session_state = SESSION_STATE_CREATED;
457 ctx->c_s_index = app_session->session_index;
459 SRTP_DBG (1, "Accept on listener %u new connection [%u]%x",
460 srtp_listener->opaque, vlib_get_thread_index (), ctx_handle);
462 return srtp_ctx_init_server (ctx);
466 srtp_app_rx_callback (session_t *us)
470 ctx = srtp_ctx_get_w_thread (us->opaque, us->thread_index);
471 srtp_ctx_read (ctx, us);
476 srtp_app_tx_callback (session_t *us)
480 ctx = srtp_ctx_get_w_thread (us->opaque, us->thread_index);
481 transport_connection_reschedule (&ctx->connection);
487 srtp_app_session_cleanup (session_t *s, session_cleanup_ntf_t ntf)
491 if (ntf == SESSION_CLEANUP_TRANSPORT)
493 /* Allow cleanup of tcp session */
494 if (s->session_state == SESSION_STATE_TRANSPORT_DELETED)
499 ctx = srtp_ctx_get_w_thread (s->opaque, s->thread_index);
500 if (!ctx->no_app_session)
501 session_transport_delete_notify (&ctx->connection);
502 srtp_ctx_deinit (ctx);
507 srtp_migrate_ctx_reply (void *arg)
509 u32 ctx_index = pointer_to_uword (arg);
512 ctx = srtp_ctx_get_w_thread (ctx_index, vlib_get_thread_index ());
517 srtp_migrate_ctx (void *arg)
519 u32 ctx_handle, thread_index, old_thread_index, old_ctx_index;
520 srtp_tc_t *ctx = (srtp_tc_t *) arg;
521 session_t *us, *new_app_session;
524 old_thread_index = ctx->c_thread_index;
525 old_ctx_index = ctx->c_c_index;
526 thread_index = session_thread_from_handle (ctx->srtp_session_handle);
527 ASSERT (thread_index == vlib_get_thread_index ());
529 ctx_handle = srtp_ctx_attach (thread_index, ctx);
530 ctx = srtp_ctx_get_w_thread (ctx_handle, thread_index);
531 ctx->srtp_ctx_handle = ctx_handle;
532 SRTP_DBG (1, "migrated ctx handle %u", ctx_handle);
534 us = session_get_from_handle (ctx->srtp_session_handle);
535 us->opaque = ctx_handle;
536 us->flags &= ~SESSION_F_IS_MIGRATING;
537 if (svm_fifo_max_dequeue (us->tx_fifo))
538 session_send_io_evt_to_thread (us->tx_fifo, SESSION_IO_EVT_TX);
540 /* Migrate app session as well */
541 session_dgram_connect_notify (&ctx->connection, old_thread_index,
544 /* Call back original thread and ask for cleanup */
545 rargs = uword_to_pointer ((uword) old_ctx_index, void *);
546 session_send_rpc_evt_to_thread (old_thread_index, srtp_migrate_ctx_reply,
551 srtp_session_migrate_callback (session_t *us, session_handle_t new_sh)
553 u32 new_thread = session_thread_from_handle (new_sh);
554 srtp_tc_t *ctx, *cloned_ctx;
556 ctx = srtp_ctx_get_w_thread (us->opaque, us->thread_index);
557 ctx->srtp_session_handle = new_sh;
558 cloned_ctx = srtp_ctx_detach (ctx);
559 SRTP_DBG (1, "ctx %u attached to udp %x session migrating",
560 cloned_ctx->c_c_index, new_sh);
562 session_send_rpc_evt_to_thread (new_thread, srtp_migrate_ctx,
563 (void *) cloned_ctx);
565 /* Can't free ctx now because app might be sending as srtp is not
566 * connection oriented, so it won't wait for a handshake */
567 ctx->is_migrated = 1;
570 static session_cb_vft_t srtp_app_cb_vft = {
571 .session_accept_callback = srtp_session_accept_callback,
572 .session_disconnect_callback = srtp_session_disconnect_callback,
573 .session_connected_callback = srtp_session_connected_callback,
574 .session_reset_callback = srtp_session_reset_callback,
575 .add_segment_callback = srtp_add_segment_callback,
576 .del_segment_callback = srtp_del_segment_callback,
577 .builtin_app_rx_callback = srtp_app_rx_callback,
578 .builtin_app_tx_callback = srtp_app_tx_callback,
579 .session_migrate_callback = srtp_session_migrate_callback,
580 .session_cleanup_callback = srtp_app_session_cleanup,
583 static clib_error_t *
584 srtp_enable (vlib_main_t *vm, u8 is_en)
586 u32 add_segment_size = 256 << 20, first_seg_size = 32 << 20;
587 vnet_app_detach_args_t _da, *da = &_da;
588 vnet_app_attach_args_t _a, *a = &_a;
589 u64 options[APP_OPTIONS_N_OPTIONS];
590 srtp_main_t *sm = &srtp_main;
591 u32 fifo_size = 128 << 12;
595 da->app_index = sm->app_index;
596 da->api_client_index = APP_INVALID_INDEX;
597 vnet_application_detach (da);
602 vec_validate (sm->ctx_pool, vlib_num_workers ());
604 first_seg_size = sm->first_seg_size ? sm->first_seg_size : first_seg_size;
605 fifo_size = sm->fifo_size ? sm->fifo_size : fifo_size;
607 clib_memset (a, 0, sizeof (*a));
608 clib_memset (options, 0, sizeof (options));
610 a->session_cb_vft = &srtp_app_cb_vft;
611 a->api_client_index = APP_INVALID_INDEX;
612 a->options = options;
613 a->name = format (0, "srtp");
614 a->options[APP_OPTIONS_SEGMENT_SIZE] = first_seg_size;
615 a->options[APP_OPTIONS_ADD_SEGMENT_SIZE] = add_segment_size;
616 a->options[APP_OPTIONS_RX_FIFO_SIZE] = fifo_size;
617 a->options[APP_OPTIONS_TX_FIFO_SIZE] = fifo_size;
618 a->options[APP_OPTIONS_FLAGS] = APP_OPTIONS_FLAGS_IS_BUILTIN;
619 a->options[APP_OPTIONS_FLAGS] |= APP_OPTIONS_FLAGS_USE_GLOBAL_SCOPE;
620 a->options[APP_OPTIONS_FLAGS] |= APP_OPTIONS_FLAGS_IS_TRANSPORT_APP;
622 if (vnet_application_attach (a))
623 return clib_error_return (0, "failed to attach srtp app");
625 sm->app_index = a->app_index;
632 srtp_connect (transport_endpoint_cfg_t *tep)
634 vnet_connect_args_t _cargs = { {}, }, *cargs = &_cargs;
635 session_endpoint_cfg_t *sep;
636 srtp_main_t *sm = &srtp_main;
637 app_worker_t *app_wrk;
643 sep = (session_endpoint_cfg_t *) tep;
645 return SESSION_E_NOEXTCFG;
647 app_wrk = app_worker_get (sep->app_wrk_index);
648 app = application_get (app_wrk->app_index);
650 ctx_index = srtp_ctx_alloc_w_thread (1 /* because of udp */);
651 ctx = srtp_ctx_get_w_thread (ctx_index, 1);
652 ctx->parent_app_wrk_index = sep->app_wrk_index;
653 ctx->parent_app_api_context = sep->opaque;
654 ctx->udp_is_ip4 = sep->is_ip4;
655 ctx->srtp_ctx_handle = ctx_index;
656 ctx->c_flags |= TRANSPORT_CONNECTION_F_NO_LOOKUP;
658 srtp_init_policy (ctx, (transport_endpt_cfg_srtp_t *) sep->ext_cfg->data);
660 clib_memcpy_fast (&cargs->sep, sep, sizeof (session_endpoint_t));
661 cargs->sep.transport_proto = TRANSPORT_PROTO_UDP;
662 cargs->sep_ext.transport_flags = TRANSPORT_CFG_F_CONNECTED;
663 cargs->app_index = sm->app_index;
664 cargs->api_context = ctx_index;
665 cargs->sep_ext.ns_index = app->ns_index;
666 if ((rv = vnet_connect (cargs)))
669 SRTP_DBG (1, "New connect request %u", ctx_index);
674 srtp_disconnect_transport (srtp_tc_t *ctx)
676 vnet_disconnect_args_t a = {
677 .handle = ctx->srtp_session_handle,
678 .app_index = srtp_main.app_index,
681 if (vnet_disconnect_session (&a))
682 SRTP_DBG (0, "disconnect returned");
686 srtp_disconnect (u32 ctx_handle, u32 thread_index)
688 session_t *app_session;
691 SRTP_DBG (1, "App disconnecting %x", ctx_handle);
693 ctx = srtp_ctx_get_w_thread (ctx_handle, thread_index);
695 app_session = session_get_from_handle (ctx->app_session_handle);
696 if (!svm_fifo_max_dequeue_cons (app_session->tx_fifo))
699 srtp_disconnect_transport (ctx);
700 session_transport_closed_notify (&ctx->connection);
704 /* Wait for all data to be written to udp */
710 srtp_start_listen (u32 app_listener_index, transport_endpoint_cfg_t *tep)
712 vnet_listen_args_t _bargs, *args = &_bargs;
713 session_handle_t udp_al_handle;
714 srtp_main_t *sm = &srtp_main;
715 session_endpoint_cfg_t *sep;
716 session_t *srtp_listener;
717 session_t *app_listener;
718 app_worker_t *app_wrk;
724 sep = (session_endpoint_cfg_t *) tep;
726 return SESSION_E_NOEXTCFG;
728 app_wrk = app_worker_get (sep->app_wrk_index);
729 app = application_get (app_wrk->app_index);
731 clib_memset (args, 0, sizeof (*args));
732 args->app_index = sm->app_index;
733 args->sep_ext = *sep;
734 args->sep_ext.ns_index = app->ns_index;
735 args->sep_ext.transport_proto = TRANSPORT_PROTO_UDP;
736 args->sep_ext.transport_flags = TRANSPORT_CFG_F_CONNECTED;
737 if (vnet_listen (args))
740 lctx_index = srtp_listener_ctx_alloc ();
741 udp_al_handle = args->handle;
742 al = app_listener_get_w_handle (udp_al_handle);
743 srtp_listener = app_listener_get_session (al);
744 srtp_listener->opaque = lctx_index;
746 app_listener = listen_session_get (app_listener_index);
748 lctx = srtp_listener_ctx_get (lctx_index);
749 lctx->parent_app_wrk_index = sep->app_wrk_index;
750 lctx->srtp_session_handle = udp_al_handle;
751 lctx->app_session_handle = listen_session_get_handle (app_listener);
752 lctx->udp_is_ip4 = sep->is_ip4;
753 lctx->c_s_index = app_listener_index;
754 lctx->c_flags |= TRANSPORT_CONNECTION_F_NO_LOOKUP;
756 srtp_init_policy (lctx, (transport_endpt_cfg_srtp_t *) sep->ext_cfg->data);
758 SRTP_DBG (1, "Started listening %d", lctx_index);
763 srtp_stop_listen (u32 lctx_index)
765 session_endpoint_t sep = SESSION_ENDPOINT_NULL;
766 transport_connection_t *lc;
771 lctx = srtp_listener_ctx_get (lctx_index);
773 /* Cleanup listener from session lookup table */
774 ls = session_get_from_handle (lctx->srtp_session_handle);
775 lc = session_get_transport (ls);
777 sep.fib_index = lc->fib_index;
778 sep.port = lc->lcl_port;
779 sep.is_ip4 = lc->is_ip4;
780 sep.transport_proto = TRANSPORT_PROTO_SRTP;
781 clib_memcpy (&sep.ip, &lc->lcl_ip, sizeof (lc->lcl_ip));
782 session_lookup_del_session_endpoint2 (&sep);
784 vnet_unlisten_args_t a = {
785 .handle = lctx->srtp_session_handle,
786 .app_index = srtp_main.app_index,
787 .wrk_map_index = 0 /* default wrk */
789 if ((rv = vnet_unlisten (&a)))
790 SRTP_DBG (0, "unlisten returned %d", rv);
792 srtp_listener_ctx_free (lctx);
796 transport_connection_t *
797 srtp_connection_get (u32 ctx_index, u32 thread_index)
800 ctx = srtp_ctx_get_w_thread (ctx_index, thread_index);
801 return &ctx->connection;
804 transport_connection_t *
805 srtp_listener_get (u32 listener_index)
808 ctx = srtp_listener_ctx_get (listener_index);
809 return &ctx->connection;
813 srtp_custom_tx_callback (void *session, transport_send_params_t *sp)
815 session_t *app_session = (session_t *) session;
818 if (PREDICT_FALSE (app_session->session_state >=
819 SESSION_STATE_TRANSPORT_CLOSED))
822 ctx = srtp_ctx_get_w_thread (app_session->connection_index,
823 app_session->thread_index);
824 if (PREDICT_FALSE (ctx->is_migrated))
827 return srtp_ctx_write (ctx, app_session, sp);
831 format_srtp_ctx (u8 *s, va_list *args)
833 srtp_tc_t *ctx = va_arg (*args, srtp_tc_t *);
836 session_parse_handle (ctx->srtp_session_handle, &udp_si, &udp_ti);
837 s = format (s, "[%d:%d][SRTP] app_wrk %u index %u udp %d:%d",
838 ctx->c_thread_index, ctx->c_s_index, ctx->parent_app_wrk_index,
839 ctx->srtp_ctx_handle, udp_ti, udp_si);
845 format_srtp_listener_ctx (u8 *s, va_list *args)
847 session_t *udp_listener;
851 ctx = va_arg (*args, srtp_tc_t *);
853 al = app_listener_get_w_handle (ctx->srtp_session_handle);
854 udp_listener = app_listener_get_session (al);
855 s = format (s, "[%d:%d][SRTP] app_wrk %u udp %d:%d", ctx->c_thread_index,
856 ctx->c_s_index, ctx->parent_app_wrk_index,
857 udp_listener->thread_index, udp_listener->session_index);
863 format_srtp_ctx_state (u8 *s, va_list *args)
868 ctx = va_arg (*args, srtp_tc_t *);
869 us = session_get (ctx->c_s_index, ctx->c_thread_index);
870 if (us->session_state == SESSION_STATE_LISTENING)
871 s = format (s, "%s", "LISTEN");
874 if (us->session_state >= SESSION_STATE_TRANSPORT_CLOSED)
875 s = format (s, "%s", "CLOSED");
876 else if (us->session_state == SESSION_STATE_APP_CLOSED)
877 s = format (s, "%s", "APP-CLOSED");
878 else if (us->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
879 s = format (s, "%s", "CLOSING");
881 s = format (s, "%s", "ESTABLISHED");
888 format_srtp_connection (u8 *s, va_list *args)
890 u32 ctx_index = va_arg (*args, u32);
891 u32 thread_index = va_arg (*args, u32);
892 u32 verbose = va_arg (*args, u32);
895 ctx = srtp_ctx_get_w_thread (ctx_index, thread_index);
899 s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_srtp_ctx, ctx);
903 format (s, "%-" SESSION_CLI_STATE_LEN "U", format_srtp_ctx_state, ctx);
905 s = format (s, "\n");
911 format_srtp_listener (u8 *s, va_list *args)
913 u32 tc_index = va_arg (*args, u32);
914 u32 __clib_unused thread_index = va_arg (*args, u32);
915 u32 verbose = va_arg (*args, u32);
916 srtp_tc_t *ctx = srtp_listener_ctx_get (tc_index);
918 s = format (s, "%-" SESSION_CLI_ID_LEN "U", format_srtp_listener_ctx, ctx);
920 s = format (s, "%-" SESSION_CLI_STATE_LEN "U", format_srtp_ctx_state, ctx);
925 format_srtp_half_open (u8 *s, va_list *args)
931 srtp_transport_endpoint_get (u32 ctx_handle, u32 thread_index,
932 transport_endpoint_t *tep, u8 is_lcl)
934 srtp_tc_t *ctx = srtp_ctx_get_w_thread (ctx_handle, thread_index);
935 session_t *udp_session;
937 udp_session = session_get_from_handle (ctx->srtp_session_handle);
938 session_get_endpoint (udp_session, tep, is_lcl);
942 srtp_transport_listener_endpoint_get (u32 ctx_handle,
943 transport_endpoint_t *tep, u8 is_lcl)
945 session_t *srtp_listener;
947 srtp_tc_t *ctx = srtp_listener_ctx_get (ctx_handle);
949 al = app_listener_get_w_handle (ctx->srtp_session_handle);
950 srtp_listener = app_listener_get_session (al);
951 session_get_endpoint (srtp_listener, tep, is_lcl);
954 static const transport_proto_vft_t srtp_proto = {
955 .enable = srtp_enable,
956 .connect = srtp_connect,
957 .close = srtp_disconnect,
958 .start_listen = srtp_start_listen,
959 .stop_listen = srtp_stop_listen,
960 .get_connection = srtp_connection_get,
961 .get_listener = srtp_listener_get,
962 .custom_tx = srtp_custom_tx_callback,
963 .format_connection = format_srtp_connection,
964 .format_half_open = format_srtp_half_open,
965 .format_listener = format_srtp_listener,
966 .get_transport_endpoint = srtp_transport_endpoint_get,
967 .get_transport_listener_endpoint = srtp_transport_listener_endpoint_get,
968 .transport_options = {
971 .tx_type = TRANSPORT_TX_INTERNAL,
972 .service_type = TRANSPORT_SERVICE_APP,
976 static clib_error_t *
977 srtp_transport_init (vlib_main_t *vm)
979 transport_register_protocol (TRANSPORT_PROTO_SRTP, &srtp_proto,
980 FIB_PROTOCOL_IP4, ~0);
981 transport_register_protocol (TRANSPORT_PROTO_SRTP, &srtp_proto,
982 FIB_PROTOCOL_IP6, ~0);
986 VLIB_INIT_FUNCTION (srtp_transport_init);
988 VLIB_PLUGIN_REGISTER () = {
989 .version = VPP_BUILD_VER,
990 .description = "Secure Real-time Transport Protocol (SRTP)",
991 .default_disabled = 1,
995 * fd.io coding-style-patch-verification: ON
998 * eval: (c-set-style "gnu")