2 * Copyright (c) 2017 SUSE LLC.
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.
15 #include <vnet/sctp/sctp.h>
16 #include <vnet/sctp/sctp_debug.h>
18 sctp_main_t sctp_main;
21 sctp_connection_bind (u32 session_index, transport_endpoint_t * tep)
23 sctp_main_t *tm = &sctp_main;
24 sctp_connection_t *listener;
27 pool_get (tm->listener_pool, listener);
28 memset (listener, 0, sizeof (*listener));
30 listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].parent = listener;
31 listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_c_index =
32 listener - tm->listener_pool;
33 listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.lcl_port = tep->port;
35 /* If we are provided a sw_if_index, bind using one of its IPs */
36 if (ip_is_zero (&tep->ip, 1) && tep->sw_if_index != ENDPOINT_INVALID_INDEX)
38 if ((iface_ip = ip_interface_get_first_ip (tep->sw_if_index,
40 ip_set (&tep->ip, iface_ip, tep->is_ip4);
42 ip_copy (&listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.lcl_ip,
43 &tep->ip, tep->is_ip4);
45 listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.is_ip4 = tep->is_ip4;
46 listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.proto =
48 listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_s_index = session_index;
49 listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.fib_index =
51 listener->state = SCTP_STATE_CLOSED;
53 sctp_connection_timers_init (listener);
55 return listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_c_index;
59 sctp_session_bind (u32 session_index, transport_endpoint_t * tep)
61 return sctp_connection_bind (session_index, tep);
65 sctp_connection_unbind (u32 listener_index)
67 sctp_main_t *tm = vnet_get_sctp_main ();
68 sctp_connection_t *sctp_conn;
70 sctp_conn = pool_elt_at_index (tm->listener_pool, listener_index);
72 /* Poison the entry */
74 memset (sctp_conn, 0xFA, sizeof (*sctp_conn));
76 pool_put_index (tm->listener_pool, listener_index);
80 sctp_session_unbind (u32 listener_index)
82 sctp_connection_unbind (listener_index);
87 sctp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add)
89 sctp_main_t *tm = &sctp_main;
91 tm->punt_unknown4 = is_add;
93 tm->punt_unknown6 = is_add;
97 sctp_alloc_custom_local_endpoint (sctp_main_t * tm, ip46_address_t * lcl_addr,
98 u16 * lcl_port, u8 is_ip4)
103 index = tm->last_v4_address_rotor++;
104 if (tm->last_v4_address_rotor >= vec_len (tm->ip4_src_addresses))
105 tm->last_v4_address_rotor = 0;
106 lcl_addr->ip4.as_u32 = tm->ip4_src_addresses[index].as_u32;
110 index = tm->last_v6_address_rotor++;
111 if (tm->last_v6_address_rotor >= vec_len (tm->ip6_src_addresses))
112 tm->last_v6_address_rotor = 0;
113 clib_memcpy (&lcl_addr->ip6, &tm->ip6_src_addresses[index],
114 sizeof (ip6_address_t));
116 port = transport_alloc_local_port (TRANSPORT_PROTO_SCTP, lcl_addr);
119 clib_warning ("Failed to allocate src port");
127 * Initialize all connection timers as invalid
130 sctp_connection_timers_init (sctp_connection_t * sctp_conn)
134 /* Set all to invalid */
135 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
137 sctp_conn->sub_conn[i].RTO = SCTP_RTO_INIT;
139 for (j = 0; j < SCTP_N_TIMERS; j++)
141 sctp_conn->sub_conn[i].timers[j] = SCTP_TIMER_HANDLE_INVALID;
147 * Stop all connection timers
150 sctp_connection_timers_reset (sctp_connection_t * sctp_conn)
153 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
155 for (j = 0; j < SCTP_N_TIMERS; j++)
156 sctp_timer_reset (sctp_conn, i, j);
160 const char *sctp_fsm_states[] = {
161 #define _(sym, str) str,
162 foreach_sctp_fsm_state
167 format_sctp_state (u8 * s, va_list * args)
169 u32 state = va_arg (*args, u32);
171 if (state < SCTP_N_STATES)
172 s = format (s, "%s", sctp_fsm_states[state]);
174 s = format (s, "UNKNOWN (%d (0x%x))", state, state);
179 format_sctp_connection_id (u8 * s, va_list * args)
182 sctp_connection_t *sctp_conn = va_arg (*args, sctp_connection_t *);
185 if (sctp_conn->c_is_ip4)
187 s = format (s, "[#%d][%s] %U:%d->%U:%d", sctp_conn->c_thread_index, "T",
188 format_ip4_address, &sctp_conn->c_lcl_ip4,
189 clib_net_to_host_u16 (sctp_conn->c_lcl_port), format_ip4_address,
190 &sctp_conn->c_rmt_ip4, clib_net_to_host_u16 (sctp_conn->c_rmt_port));
194 s = format (s, "[#%d][%s] %U:%d->%U:%d", sctp_conn->c_thread_index, "T",
195 format_ip6_address, &sctp_conn->c_lcl_ip6,
196 clib_net_to_host_u16 (sctp_conn->c_lcl_port), format_ip6_address,
197 &sctp_conn->c_rmt_ip6, clib_net_to_host_u16 (sctp_conn->c_rmt_port));
204 format_sctp_connection (u8 * s, va_list * args)
206 sctp_connection_t *sctp_conn = va_arg (*args, sctp_connection_t *);
207 u32 verbose = va_arg (*args, u32);
211 s = format (s, "%-50U", format_sctp_connection_id, sctp_conn);
214 s = format (s, "%-15U", format_sctp_state, sctp_conn->state);
221 * Initialize connection send variables.
224 sctp_init_snd_vars (sctp_connection_t * sctp_conn)
228 * We use the time to randomize iss and for setting up the initial
229 * timestamp. Make sure it's updated otherwise syn and ack in the
230 * handshake may make it look as if time has flown in the opposite
234 sctp_set_time_now (vlib_get_thread_index ());
235 time_now = sctp_time_now ();
237 sctp_conn->local_initial_tsn = random_u32 (&time_now);
238 sctp_conn->remote_initial_tsn = 0x0;
239 sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn;
240 sctp_conn->next_tsn = sctp_conn->local_initial_tsn + 1;
244 * Update max segment size we're able to process.
246 * The value is constrained by our interface's MTU and IP options. It is
247 * also what we advertise to our peer.
250 sctp_update_rcv_mss (sctp_connection_t * sctp_conn)
252 sctp_conn->smallest_PMTU = DEFAULT_A_RWND; /* TODO find our iface MTU */
253 sctp_conn->a_rwnd = DEFAULT_A_RWND - sizeof (sctp_full_hdr_t);
254 sctp_conn->rcv_opts.a_rwnd = sctp_conn->a_rwnd;
255 sctp_conn->rcv_a_rwnd = sctp_conn->a_rwnd; /* This will be updated by our congestion algos */
259 sctp_init_mss (sctp_connection_t * sctp_conn)
261 SCTP_DBG ("CONN_INDEX = %u",
262 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.c_index);
264 u16 default_a_rwnd = 536;
265 sctp_update_rcv_mss (sctp_conn);
267 /* TODO cache mss and consider PMTU discovery */
268 sctp_conn->snd_a_rwnd =
269 clib_min (sctp_conn->rcv_opts.a_rwnd, sctp_conn->a_rwnd);
271 if (sctp_conn->snd_a_rwnd < sizeof (sctp_full_hdr_t))
273 SCTP_ADV_DBG ("sctp_conn->snd_a_rwnd < sizeof(sctp_full_hdr_t)");
274 /* Assume that at least the min default mss works */
275 sctp_conn->snd_a_rwnd = default_a_rwnd;
276 sctp_conn->rcv_opts.a_rwnd = default_a_rwnd;
279 ASSERT (sctp_conn->snd_a_rwnd > sizeof (sctp_full_hdr_t));
282 always_inline sctp_connection_t *
283 sctp_sub_connection_add (u8 thread_index)
285 sctp_main_t *tm = vnet_get_sctp_main ();
286 sctp_connection_t *sctp_conn = tm->connections[thread_index];
288 sctp_conn->sub_conn[sctp_conn->next_avail_sub_conn].connection.c_index =
289 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.c_index;
290 sctp_conn->sub_conn[sctp_conn->next_avail_sub_conn].
291 connection.thread_index = thread_index;
292 sctp_conn->sub_conn[sctp_conn->next_avail_sub_conn].parent = sctp_conn;
294 sctp_conn->next_avail_sub_conn += 1;
300 sctp_sub_connection_add_ip4 (u8 thread_index,
301 sctp_ipv4_addr_param_t * ipv4_addr)
303 sctp_connection_t *sctp_conn = sctp_sub_connection_add (thread_index);
305 clib_memcpy (&sctp_conn->
306 sub_conn[sctp_conn->next_avail_sub_conn].connection.lcl_ip.ip4,
307 &ipv4_addr->address, sizeof (ipv4_addr->address));
311 sctp_sub_connection_add_ip6 (u8 thread_index,
312 sctp_ipv6_addr_param_t * ipv6_addr)
314 sctp_connection_t *sctp_conn = sctp_sub_connection_add (thread_index);
316 clib_memcpy (&sctp_conn->
317 sub_conn[sctp_conn->next_avail_sub_conn].connection.lcl_ip.ip6,
318 &ipv6_addr->address, sizeof (ipv6_addr->address));
322 sctp_connection_new (u8 thread_index)
324 sctp_main_t *tm = vnet_get_sctp_main ();
325 sctp_connection_t *sctp_conn;
327 pool_get (tm->connections[thread_index], sctp_conn);
328 memset (sctp_conn, 0, sizeof (*sctp_conn));
329 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].parent = sctp_conn;
330 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_c_index =
331 sctp_conn - tm->connections[thread_index];
332 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_thread_index = thread_index;
333 sctp_conn->local_tag = 0;
334 sctp_conn->next_avail_sub_conn = 1;
340 sctp_half_open_connection_new (u8 thread_index)
342 sctp_main_t *tm = vnet_get_sctp_main ();
343 sctp_connection_t *sctp_conn = 0;
344 ASSERT (vlib_get_thread_index () == 0);
345 pool_get (tm->half_open_connections, sctp_conn);
346 memset (sctp_conn, 0, sizeof (*sctp_conn));
347 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_c_index =
348 sctp_conn - tm->half_open_connections;
349 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].parent = sctp_conn;
354 sctp_connection_open (transport_endpoint_t * rmt)
356 sctp_main_t *tm = vnet_get_sctp_main ();
357 sctp_connection_t *sctp_conn;
358 ip46_address_t lcl_addr;
363 u8 idx = sctp_pick_conn_idx_on_state (SCTP_STATE_CLOSED);
366 * Allocate local endpoint
368 if ((rmt->is_ip4 && vec_len (tm->ip4_src_addresses))
369 || (!rmt->is_ip4 && vec_len (tm->ip6_src_addresses)))
370 rv = sctp_alloc_custom_local_endpoint (tm, &lcl_addr, &lcl_port,
373 rv = transport_alloc_local_endpoint (TRANSPORT_PROTO_SCTP,
374 rmt, &lcl_addr, &lcl_port);
380 * Create connection and send INIT CHUNK
382 thread_id = vlib_get_thread_index ();
383 ASSERT (thread_id == 0);
385 clib_spinlock_lock_if_init (&tm->half_open_lock);
386 sctp_conn = sctp_half_open_connection_new (thread_id);
388 transport_connection_t *trans_conn = &sctp_conn->sub_conn[idx].connection;
389 ip_copy (&trans_conn->rmt_ip, &rmt->ip, rmt->is_ip4);
390 ip_copy (&trans_conn->lcl_ip, &lcl_addr, rmt->is_ip4);
391 sctp_conn->sub_conn[idx].parent = sctp_conn;
392 trans_conn->rmt_port = rmt->port;
393 trans_conn->lcl_port = clib_host_to_net_u16 (lcl_port);
394 trans_conn->is_ip4 = rmt->is_ip4;
395 trans_conn->proto = TRANSPORT_PROTO_SCTP;
396 trans_conn->fib_index = rmt->fib_index;
398 sctp_connection_timers_init (sctp_conn);
399 /* The other connection vars will be initialized after INIT_ACK chunk received */
400 sctp_init_snd_vars (sctp_conn);
402 sctp_send_init (sctp_conn);
404 clib_spinlock_unlock_if_init (&tm->half_open_lock);
406 return sctp_conn->sub_conn[idx].connection.c_index;
410 * Cleans up connection state.
415 sctp_connection_cleanup (sctp_connection_t * sctp_conn)
417 sctp_main_t *tm = &sctp_main;
420 /* Cleanup local endpoint if this was an active connect */
421 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
422 transport_endpoint_cleanup (TRANSPORT_PROTO_SCTP,
423 &sctp_conn->sub_conn[i].connection.lcl_ip,
424 sctp_conn->sub_conn[i].connection.lcl_port);
426 /* Check if connection is not yet fully established */
427 if (sctp_conn->state == SCTP_STATE_COOKIE_WAIT)
434 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.thread_index;
436 /* Make sure all timers are cleared */
437 sctp_connection_timers_reset (sctp_conn);
439 /* Poison the entry */
441 memset (sctp_conn, 0xFA, sizeof (*sctp_conn));
442 pool_put (tm->connections[thread_index], sctp_conn);
447 sctp_session_open (transport_endpoint_t * tep)
449 return sctp_connection_open (tep);
453 sctp_check_outstanding_data_chunks (sctp_connection_t * sctp_conn)
455 return 0; /* Indicates no more data to be read/sent */
459 sctp_connection_close (sctp_connection_t * sctp_conn)
461 SCTP_DBG ("Closing connection %u...",
462 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.c_index);
464 sctp_conn->state = SCTP_STATE_SHUTDOWN_PENDING;
466 sctp_send_shutdown (sctp_conn);
470 sctp_session_close (u32 conn_index, u32 thread_index)
472 ASSERT (thread_index == 0);
474 sctp_connection_t *sctp_conn;
475 sctp_conn = sctp_connection_get (conn_index, thread_index);
476 sctp_connection_close (sctp_conn);
480 sctp_session_cleanup (u32 conn_index, u32 thread_index)
482 sctp_connection_t *sctp_conn;
483 sctp_conn = sctp_connection_get (conn_index, thread_index);
484 sctp_connection_timers_reset (sctp_conn);
486 /* Wait for the session tx events to clear */
487 sctp_conn->state = SCTP_STATE_CLOSED;
491 * Update snd_mss to reflect the effective segment size that we can send
494 sctp_update_snd_mss (sctp_connection_t * sctp_conn)
496 /* The overhead for the sctp_header_t and sctp_chunks_common_hdr_t
497 * (the sum equals to sctp_full_hdr_t) is already taken into account
498 * for the sctp_conn->a_rwnd computation.
499 * So let's not account it again here.
501 sctp_conn->snd_hdr_length =
502 sizeof (sctp_payload_data_chunk_t) - sizeof (sctp_full_hdr_t);
503 sctp_conn->snd_a_rwnd =
504 clib_min (sctp_conn->a_rwnd,
505 sctp_conn->rcv_opts.a_rwnd) - sctp_conn->snd_hdr_length;
507 SCTP_DBG ("sctp_conn->snd_a_rwnd = %u, sctp_conn->snd_hdr_length = %u ",
508 sctp_conn->snd_a_rwnd, sctp_conn->snd_hdr_length);
510 ASSERT (sctp_conn->snd_a_rwnd > 0);
514 sctp_session_send_mss (transport_connection_t * trans_conn)
516 SCTP_DBG ("CONN_INDEX: %u", trans_conn->c_index);
518 sctp_connection_t *sctp_conn =
519 sctp_get_connection_from_transport (trans_conn);
521 if (trans_conn == NULL)
523 SCTP_DBG ("trans_conn == NULL");
527 if (sctp_conn == NULL)
529 SCTP_DBG ("sctp_conn == NULL");
532 /* Ensure snd_mss does accurately reflect the amount of data we can push
533 * in a segment. This also makes sure that options are updated according to
534 * the current state of the connection. */
535 sctp_update_snd_mss (sctp_conn);
537 return sctp_conn->snd_a_rwnd;
541 sctp_snd_space (sctp_connection_t * sctp_conn)
543 /* TODO: This requires a real implementation */
544 if (sctp_conn == NULL)
546 SCTP_DBG ("sctp_conn == NULL");
550 if (sctp_conn->state != SCTP_STATE_ESTABLISHED)
552 SCTP_DBG_STATE_MACHINE
553 ("Trying to send DATA while not in SCTP_STATE_ESTABLISHED");
557 return sctp_conn->snd_a_rwnd;
561 sctp_session_send_space (transport_connection_t * trans_conn)
563 SCTP_DBG ("CONN_INDEX: %u", trans_conn->c_index);
565 sctp_connection_t *sctp_conn =
566 sctp_get_connection_from_transport (trans_conn);
568 return sctp_snd_space (sctp_conn);
571 transport_connection_t *
572 sctp_session_get_transport (u32 conn_index, u32 thread_index)
574 sctp_connection_t *sctp_conn =
575 sctp_connection_get (conn_index, thread_index);
576 return &sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection;
579 transport_connection_t *
580 sctp_session_get_listener (u32 listener_index)
582 sctp_main_t *tm = vnet_get_sctp_main ();
583 sctp_connection_t *sctp_conn;
584 sctp_conn = pool_elt_at_index (tm->listener_pool, listener_index);
585 return &sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection;
589 format_sctp_session (u8 * s, va_list * args)
595 format_sctp_listener_session (u8 * s, va_list * args)
601 sctp_timer_init_handler (u32 conn_index, u32 timer_id)
603 sctp_connection_t *sctp_conn;
605 sctp_conn = sctp_connection_get (conn_index, vlib_get_thread_index ());
606 /* note: the connection may have already disappeared */
607 if (PREDICT_FALSE (sctp_conn == 0))
609 ASSERT (sctp_conn->state == SCTP_STATE_COOKIE_ECHOED);
613 case SCTP_TIMER_T4_HEARTBEAT:
615 clib_warning ("Heartbeat timeout");
619 /* Start cleanup. App wasn't notified yet so use delete notify as
620 * opposed to delete to cleanup session layer state. */
621 stream_session_delete_notify (&sctp_conn->
622 sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection);
624 sctp_connection_timers_reset (sctp_conn);
626 sctp_connection_cleanup (sctp_conn);
630 static sctp_timer_expiration_handler
631 * sctp_timer_expiration_handlers[SCTP_N_TIMERS] = {
632 sctp_timer_init_handler
638 sctp_expired_timers_dispatch (u32 * expired_timers)
641 u32 connection_index, timer_id;
643 for (i = 0; i < vec_len (expired_timers); i++)
645 /* Get session index and timer id */
646 connection_index = expired_timers[i] & 0x0FFFFFFF;
647 timer_id = expired_timers[i] >> 28;
649 /* Handle expiration */
650 (*sctp_timer_expiration_handlers[timer_id]) (connection_index,
656 sctp_initialize_timer_wheels (sctp_main_t * tm)
658 tw_timer_wheel_16t_2w_512sl_t *tw;
660 foreach_vlib_main (({
661 tw = &tm->timer_wheels[ii];
662 tw_timer_wheel_init_16t_2w_512sl (tw, sctp_expired_timers_dispatch,
663 100e-3 /* timer period 100ms */ , ~0);
664 tw->last_run_time = vlib_time_now (this_vlib_main);
670 sctp_main_enable (vlib_main_t * vm)
672 sctp_main_t *tm = vnet_get_sctp_main ();
673 vlib_thread_main_t *vtm = vlib_get_thread_main ();
674 clib_error_t *error = 0;
677 sctp_connection_t *sctp_conn __attribute__ ((unused));
678 u32 preallocated_connections_per_thread;
680 if ((error = vlib_call_init_function (vm, ip_main_init)))
682 if ((error = vlib_call_init_function (vm, ip4_lookup_init)))
684 if ((error = vlib_call_init_function (vm, ip6_lookup_init)))
691 ip4_register_protocol (IP_PROTOCOL_SCTP, sctp4_input_node.index);
692 ip6_register_protocol (IP_PROTOCOL_SCTP, sctp6_input_node.index);
695 * Initialize data structures
698 num_threads = 1 /* main thread */ + vtm->n_threads;
699 vec_validate (tm->connections, num_threads - 1);
702 * Preallocate connections. Assume that thread 0 won't
703 * use preallocated threads when running multi-core
705 if (num_threads == 1)
708 preallocated_connections_per_thread = tm->preallocated_connections;
713 preallocated_connections_per_thread =
714 tm->preallocated_connections / (num_threads - 1);
716 for (; thread < num_threads; thread++)
718 if (preallocated_connections_per_thread)
719 pool_init_fixed (tm->connections[thread],
720 preallocated_connections_per_thread);
723 /* Initialize per worker thread tx buffers (used for control messages) */
724 vec_validate (tm->tx_buffers, num_threads - 1);
726 /* Initialize timer wheels */
727 vec_validate (tm->timer_wheels, num_threads - 1);
728 sctp_initialize_timer_wheels (tm);
730 /* Initialize clocks per tick for SCTP timestamp. Used to compute
731 * monotonically increasing timestamps. */
732 tm->tstamp_ticks_per_clock = vm->clib_time.seconds_per_clock
733 / SCTP_TSTAMP_RESOLUTION;
739 vec_validate (tm->tx_frames[0], num_threads - 1);
740 vec_validate (tm->tx_frames[1], num_threads - 1);
741 vec_validate (tm->ip_lookup_tx_frames[0], num_threads - 1);
742 vec_validate (tm->ip_lookup_tx_frames[1], num_threads - 1);
744 tm->bytes_per_buffer = vlib_buffer_free_list_buffer_size
745 (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
747 vec_validate (tm->time_now, num_threads - 1);
752 sctp_enable_disable (vlib_main_t * vm, u8 is_en)
756 if (sctp_main.is_enabled)
759 return sctp_main_enable (vm);
763 sctp_main.is_enabled = 0;
769 transport_connection_t *
770 sctp_half_open_session_get_transport (u32 conn_index)
772 sctp_connection_t *sctp_conn = sctp_half_open_connection_get (conn_index);
773 return &sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection;
777 format_sctp_half_open (u8 * s, va_list * args)
779 u32 tci = va_arg (*args, u32);
780 sctp_connection_t *sctp_conn = sctp_half_open_connection_get (tci);
781 return format (s, "%U", format_sctp_connection_id, sctp_conn);
785 sctp_update_time (f64 now, u8 thread_index)
787 sctp_set_time_now (thread_index);
788 tw_timer_expire_timers_16t_2w_512sl (&sctp_main.timer_wheels[thread_index],
790 sctp_flush_frames_to_output (thread_index);
794 const static transport_proto_vft_t sctp_proto = {
795 .enable = sctp_enable_disable,
796 .bind = sctp_session_bind,
797 .unbind = sctp_session_unbind,
798 .open = sctp_session_open,
799 .close = sctp_session_close,
800 .cleanup = sctp_session_cleanup,
801 .push_header = sctp_push_header,
802 .send_mss = sctp_session_send_mss,
803 .send_space = sctp_session_send_space,
804 .tx_fifo_offset = NULL, //sctp_session_tx_fifo_offset,
805 .update_time = sctp_update_time,
806 .get_connection = sctp_session_get_transport,
807 .get_listener = sctp_session_get_listener,
808 .get_half_open = sctp_half_open_session_get_transport,
809 .format_connection = format_sctp_session,
810 .format_listener = format_sctp_listener_session,
811 .format_half_open = format_sctp_half_open,
817 sctp_init (vlib_main_t * vm)
819 sctp_main_t *tm = vnet_get_sctp_main ();
820 ip_main_t *im = &ip_main;
821 ip_protocol_info_t *pi;
822 /* Session layer, and by implication SCTP, are disabled by default */
825 /* Register with IP for header parsing */
826 pi = ip_get_protocol_info (im, IP_PROTOCOL_SCTP);
828 return clib_error_return (0, "SCTP protocol info AWOL");
829 pi->format_header = format_sctp_header;
830 pi->unformat_pg_edit = unformat_pg_sctp_header;
832 /* Register as transport with session layer */
833 transport_register_protocol (TRANSPORT_PROTO_SCTP, &sctp_proto,
834 FIB_PROTOCOL_IP4, sctp4_output_node.index);
835 transport_register_protocol (TRANSPORT_PROTO_SCTP, &sctp_proto,
836 FIB_PROTOCOL_IP6, sctp6_output_node.index);
841 VLIB_INIT_FUNCTION (sctp_init);
844 * fd.io coding-style-patch-verification: ON
847 * eval: (c-set-style "gnu")