2 * Copyright (c) 2019 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_local.h>
17 #include <vnet/session/session.h>
19 static ct_connection_t *connections;
22 ct_enable_disable_main_pre_input_node (u8 is_add)
26 n_conns = pool_elts (connections);
30 if (n_conns > 0 && is_add)
31 vlib_node_set_state (vlib_get_main (),
32 session_queue_pre_input_node.index,
33 VLIB_NODE_STATE_POLLING);
34 else if (n_conns == 0)
35 vlib_node_set_state (vlib_get_main (),
36 session_queue_pre_input_node.index,
37 VLIB_NODE_STATE_DISABLED);
40 static ct_connection_t *
41 ct_connection_alloc (void)
45 pool_get_zero (connections, ct);
46 ct->c_c_index = ct - connections;
47 ct->c_thread_index = 0;
53 static ct_connection_t *
54 ct_connection_get (u32 ct_index)
56 if (pool_is_free_index (connections, ct_index))
58 return pool_elt_at_index (connections, ct_index);
62 ct_connection_free (ct_connection_t * ct)
65 memset (ct, 0xfc, sizeof (*ct));
66 pool_put (connections, ct);
70 ct_session_get_peer (session_t * s)
72 ct_connection_t *ct, *peer_ct;
73 ct = ct_connection_get (s->connection_index);
74 peer_ct = ct_connection_get (ct->peer_index);
75 return session_get (peer_ct->c_s_index, 0);
79 ct_session_endpoint (session_t * ll, session_endpoint_t * sep)
82 ct = (ct_connection_t *) session_get_transport (ll);
83 sep->transport_proto = ct->actual_tp;
84 sep->port = ct->c_lcl_port;
85 sep->is_ip4 = ct->c_is_ip4;
89 ct_session_connect_notify (session_t * ss)
91 svm_fifo_segment_private_t *seg;
92 ct_connection_t *sct, *cct;
93 app_worker_t *client_wrk;
94 segment_manager_t *sm;
100 ss_index = ss->session_index;
101 sct = (ct_connection_t *) session_get_transport (ss);
102 client_wrk = app_worker_get (sct->client_wrk);
104 sm = segment_manager_get (ss->rx_fifo->segment_manager);
105 seg = segment_manager_get_segment_w_lock (sm, ss->rx_fifo->segment_index);
106 segment_handle = segment_manager_segment_handle (sm, seg);
108 if (app_worker_add_segment_notify (client_wrk, segment_handle))
110 clib_warning ("failed to notify client %u of new segment",
112 segment_manager_segment_reader_unlock (sm);
118 segment_manager_segment_reader_unlock (sm);
121 /* Alloc client session */
122 cct = ct_connection_get (sct->peer_index);
124 cs = session_alloc (0);
125 ss = session_get (ss_index, 0);
126 cs->session_type = ss->session_type;
127 cs->connection_index = sct->c_c_index;
128 cs->listener_index = SESSION_INVALID_INDEX;
129 cs->session_state = SESSION_STATE_CONNECTING;
130 cs->app_wrk_index = client_wrk->wrk_index;
131 cs->connection_index = cct->c_c_index;
132 cs->t_app_index = client_wrk->app_index;
134 cct->c_s_index = cs->session_index;
135 cct->client_rx_fifo = ss->tx_fifo;
136 cct->client_tx_fifo = ss->rx_fifo;
138 cct->client_rx_fifo->refcnt++;
139 cct->client_tx_fifo->refcnt++;
141 /* This will allocate fifos for the session. They won't be used for
142 * exchanging data but they will be used to close the connection if
143 * the segment manager/worker is freed */
144 if (app_worker_init_connected (client_wrk, cs))
150 if (app_worker_connect_notify (client_wrk, is_fail ? 0 : cs,
157 cs = session_get (cct->c_s_index, 0);
158 cs->session_state = SESSION_STATE_READY;
164 ct_init_local_session (app_worker_t * client_wrk, app_worker_t * server_wrk,
165 ct_connection_t * ct, session_t * ls, session_t * ll)
167 u32 round_rx_fifo_sz, round_tx_fifo_sz, sm_index, seg_size;
168 segment_manager_properties_t *props;
169 svm_fifo_segment_private_t *seg;
170 application_t *server;
171 segment_manager_t *sm;
172 u32 margin = 16 << 10;
176 server = application_get (server_wrk->app_index);
178 props = application_segment_manager_properties (server);
179 round_rx_fifo_sz = 1 << max_log2 (props->rx_fifo_size);
180 round_tx_fifo_sz = 1 << max_log2 (props->tx_fifo_size);
181 seg_size = round_rx_fifo_sz + round_tx_fifo_sz + margin;
183 sm = app_worker_get_listen_segment_manager (server_wrk, ll);
184 seg_index = segment_manager_add_segment (sm, seg_size);
187 clib_warning ("failed to add new cut-through segment");
190 seg = segment_manager_get_segment_w_lock (sm, seg_index);
192 rv = segment_manager_try_alloc_fifos (seg, props->rx_fifo_size,
193 props->tx_fifo_size, &ls->rx_fifo,
197 clib_warning ("failed to add fifos in cut-through segment");
198 segment_manager_segment_reader_unlock (sm);
202 sm_index = segment_manager_index (sm);
203 ls->rx_fifo->master_session_index = ls->session_index;
204 ls->tx_fifo->master_session_index = ls->session_index;
205 ls->rx_fifo->segment_manager = sm_index;
206 ls->tx_fifo->segment_manager = sm_index;
207 ls->rx_fifo->segment_index = seg_index;
208 ls->tx_fifo->segment_index = seg_index;
210 segment_handle = segment_manager_segment_handle (sm, seg);
211 if ((rv = app_worker_add_segment_notify (server_wrk, segment_handle)))
213 clib_warning ("failed to notify server of new segment");
214 segment_manager_segment_reader_unlock (sm);
217 segment_manager_segment_reader_unlock (sm);
218 ct->segment_handle = segment_handle;
223 segment_manager_del_segment (sm, seg);
228 ct_connect (app_worker_t * client_wrk, session_t * ll,
229 session_endpoint_cfg_t * sep)
231 u32 cct_index, ll_index, ll_ct_index;
232 ct_connection_t *sct, *cct, *ll_ct;
233 app_worker_t *server_wrk;
236 ll_index = ll->session_index;
237 ll_ct_index = ll->connection_index;
239 cct = ct_connection_alloc ();
240 cct_index = cct->c_c_index;
241 sct = ct_connection_alloc ();
242 ll_ct = ct_connection_get (ll_ct_index);
245 * Alloc and init client transport
247 cct = ct_connection_get (cct_index);
248 cct->c_thread_index = 0;
249 cct->c_rmt_port = sep->port;
251 cct->c_is_ip4 = sep->is_ip4;
252 clib_memcpy (&cct->c_rmt_ip, &sep->ip, sizeof (sep->ip));
253 cct->actual_tp = ll_ct->actual_tp;
257 * Init server transport
259 sct->c_thread_index = 0;
261 sct->c_lcl_port = ll_ct->c_lcl_port;
262 sct->c_is_ip4 = sep->is_ip4;
263 clib_memcpy (&sct->c_lcl_ip, &ll_ct->c_lcl_ip, sizeof (ll_ct->c_lcl_ip));
264 sct->client_wrk = client_wrk->wrk_index;
265 sct->c_proto = TRANSPORT_PROTO_NONE;
266 sct->client_opaque = sep->opaque;
267 sct->actual_tp = ll_ct->actual_tp;
269 sct->peer_index = cct->c_c_index;
270 cct->peer_index = sct->c_c_index;
273 * Accept server session. Client session is created only after
274 * server confirms accept.
276 ss = session_alloc (0);
277 ll = listen_session_get (ll_index);
278 ss->session_type = ll->session_type;
279 ss->connection_index = sct->c_c_index;
280 ss->listener_index = ll->session_index;
281 ss->session_state = SESSION_STATE_CREATED;
283 server_wrk = application_listener_select_worker (ll);
284 ss->app_wrk_index = server_wrk->wrk_index;
285 ss->t_app_index = server_wrk->app_index;
287 sct->c_s_index = ss->session_index;
288 sct->server_wrk = ss->app_wrk_index;
290 if (ct_init_local_session (client_wrk, server_wrk, sct, ss, ll))
292 clib_warning ("failed");
293 ct_connection_free (sct);
298 ss->session_state = SESSION_STATE_ACCEPTING;
299 if (app_worker_accept_notify (server_wrk, ss))
301 clib_warning ("failed");
302 ct_connection_free (sct);
303 session_free_w_fifos (ss);
307 cct->segment_handle = sct->segment_handle;
308 ct_enable_disable_main_pre_input_node (1 /* is_add */ );
313 ct_start_listen (u32 app_listener_index, transport_endpoint_t * tep)
315 session_endpoint_cfg_t *sep;
318 sep = (session_endpoint_cfg_t *) tep;
319 ct = ct_connection_alloc ();
320 ct->server_wrk = sep->app_wrk_index;
321 ct->c_is_ip4 = sep->is_ip4;
322 clib_memcpy (&ct->c_lcl_ip, &sep->ip, sizeof (sep->ip));
323 ct->c_lcl_port = sep->port;
324 ct->actual_tp = sep->transport_proto;
325 ct_enable_disable_main_pre_input_node (1 /* is_add */ );
326 return ct->c_c_index;
330 ct_stop_listen (u32 ct_index)
333 ct = ct_connection_get (ct_index);
334 ct_connection_free (ct);
335 ct_enable_disable_main_pre_input_node (0 /* is_add */ );
339 static transport_connection_t *
340 ct_listener_get (u32 ct_index)
342 return (transport_connection_t *) ct_connection_get (ct_index);
346 ct_session_connect (transport_endpoint_cfg_t * tep)
348 session_endpoint_cfg_t *sep_ext;
349 session_endpoint_t *sep;
350 app_worker_t *app_wrk;
358 sep_ext = (session_endpoint_cfg_t *) tep;
359 sep = (session_endpoint_t *) tep;
360 app_wrk = app_worker_get (sep_ext->app_wrk_index);
361 app = application_get (app_wrk->app_index);
363 sep->transport_proto = sep_ext->original_tp;
364 table_index = application_local_session_table (app);
365 lh = session_lookup_local_endpoint (table_index, sep);
366 if (lh == SESSION_DROP_HANDLE)
367 return VNET_API_ERROR_APP_CONNECT_FILTERED;
369 if (lh == SESSION_INVALID_HANDLE)
372 ll = listen_session_get_from_handle (lh);
373 al = app_listener_get_w_session (ll);
376 * Break loop if rule in local table points to connecting app. This
377 * can happen if client is a generic proxy. Route connect through
378 * global table instead.
380 if (al->app_index == app->app_index)
383 return ct_connect (app_wrk, ll, sep_ext);
386 * If nothing found, check the global scope for locally attached
387 * destinations. Make sure first that we're allowed to.
391 if (session_endpoint_is_local (sep))
392 return VNET_API_ERROR_SESSION_CONNECT;
394 if (!application_has_global_scope (app))
395 return VNET_API_ERROR_APP_CONNECT_SCOPE;
397 fib_proto = session_endpoint_fib_proto (sep);
398 table_index = application_session_table (app, fib_proto);
399 ll = session_lookup_listener (table_index, sep);
402 return ct_connect (app_wrk, ll, sep_ext);
404 /* Failed to connect but no error */
409 ct_session_close (u32 ct_index, u32 thread_index)
411 ct_connection_t *ct, *peer_ct;
412 app_worker_t *app_wrk;
415 ct = ct_connection_get (ct_index);
416 peer_ct = ct_connection_get (ct->peer_index);
419 peer_ct->peer_index = ~0;
420 session_transport_closing_notify (&peer_ct->connection);
423 s = session_get (ct->c_s_index, 0);
424 app_wrk = app_worker_get_if_valid (s->app_wrk_index);
426 app_worker_del_segment_notify (app_wrk, ct->segment_handle);
427 session_free_w_fifos (s);
429 segment_manager_dealloc_fifos (ct->client_rx_fifo, ct->client_tx_fifo);
431 ct_connection_free (ct);
432 ct_enable_disable_main_pre_input_node (0 /* is_add */ );
435 static transport_connection_t *
436 ct_session_get (u32 ct_index, u32 thread_index)
438 return (transport_connection_t *) ct_connection_get (ct_index);
442 format_ct_connection_id (u8 * s, va_list * args)
444 ct_connection_t *ct = va_arg (*args, ct_connection_t *);
449 s = format (s, "[%d:%d][CT:%U] %U:%d->%U:%d", ct->c_thread_index,
450 ct->c_s_index, format_transport_proto_short, ct->actual_tp,
451 format_ip4_address, &ct->c_lcl_ip4,
452 clib_net_to_host_u16 (ct->c_lcl_port), format_ip4_address,
453 &ct->c_rmt_ip4, clib_net_to_host_u16 (ct->c_rmt_port));
457 s = format (s, "[%d:%d][CT:%U] %U:%d->%U:%d", ct->c_thread_index,
458 ct->c_s_index, format_transport_proto_short, ct->actual_tp,
459 format_ip6_address, &ct->c_lcl_ip6,
460 clib_net_to_host_u16 (ct->c_lcl_port), format_ip6_address,
461 &ct->c_rmt_ip6, clib_net_to_host_u16 (ct->c_rmt_port));
468 format_ct_listener (u8 * s, va_list * args)
470 u32 tc_index = va_arg (*args, u32);
471 u32 __clib_unused verbose = va_arg (*args, u32);
472 ct_connection_t *ct = ct_connection_get (tc_index);
473 s = format (s, "%-50U", format_ct_connection_id, ct);
475 s = format (s, "%-15s", "LISTEN");
480 format_ct_connection (u8 * s, va_list * args)
482 ct_connection_t *ct = va_arg (*args, ct_connection_t *);
483 u32 verbose = va_arg (*args, u32);
487 s = format (s, "%-50U", format_ct_connection_id, ct);
490 s = format (s, "%-15s", "ESTABLISHED");
493 s = format (s, "\n");
500 format_ct_session (u8 * s, va_list * args)
502 u32 ct_index = va_arg (*args, u32);
503 u32 __clib_unused thread_index = va_arg (*args, u32);
504 u32 verbose = va_arg (*args, u32);
507 ct = ct_connection_get (ct_index);
510 s = format (s, "empty\n");
514 s = format (s, "%U", format_ct_connection, ct, verbose);
519 const static transport_proto_vft_t cut_thru_proto = {
520 .start_listen = ct_start_listen,
521 .stop_listen = ct_stop_listen,
522 .get_listener = ct_listener_get,
523 .connect = ct_session_connect,
524 .close = ct_session_close,
525 .get_connection = ct_session_get,
526 .tx_type = TRANSPORT_TX_INTERNAL,
527 .service_type = TRANSPORT_SERVICE_APP,
528 .format_listener = format_ct_listener,
529 .format_connection = format_ct_session,
534 ct_session_tx (session_t * s)
536 ct_connection_t *ct, *peer_ct;
539 ct = (ct_connection_t *) session_get_transport (s);
540 peer_ct = ct_connection_get (ct->peer_index);
543 peer_s = session_get (peer_ct->c_s_index, 0);
544 if (peer_s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
546 return session_enqueue_notify (peer_s);
549 static clib_error_t *
550 ct_transport_init (vlib_main_t * vm)
552 transport_register_protocol (TRANSPORT_PROTO_NONE, &cut_thru_proto,
553 FIB_PROTOCOL_IP4, ~0);
554 transport_register_protocol (TRANSPORT_PROTO_NONE, &cut_thru_proto,
555 FIB_PROTOCOL_IP6, ~0);
559 VLIB_INIT_FUNCTION (ct_transport_init);
562 * fd.io coding-style-patch-verification: ON
565 * eval: (c-set-style "gnu")