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].subconn_idx =
31 MAIN_SCTP_SUB_CONN_IDX;
32 listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_c_index =
33 listener - tm->listener_pool;
34 listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.lcl_port = tep->port;
36 /* If we are provided a sw_if_index, bind using one of its IPs */
37 if (ip_is_zero (&tep->ip, 1) && tep->sw_if_index != ENDPOINT_INVALID_INDEX)
39 if ((iface_ip = ip_interface_get_first_ip (tep->sw_if_index,
41 ip_set (&tep->ip, iface_ip, tep->is_ip4);
43 ip_copy (&listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.lcl_ip,
44 &tep->ip, tep->is_ip4);
46 listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].PMTU =
47 vnet_sw_interface_get_mtu (vnet_get_main (), tep->sw_if_index, VLIB_TX);
48 listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.is_ip4 = tep->is_ip4;
49 listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.proto =
51 listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_s_index = session_index;
52 listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.fib_index =
54 listener->state = SCTP_STATE_CLOSED;
56 sctp_connection_timers_init (listener);
58 return listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_c_index;
62 sctp_session_bind (u32 session_index, transport_endpoint_t * tep)
64 return sctp_connection_bind (session_index, tep);
68 sctp_connection_unbind (u32 listener_index)
70 sctp_main_t *tm = vnet_get_sctp_main ();
71 sctp_connection_t *sctp_conn;
73 sctp_conn = pool_elt_at_index (tm->listener_pool, listener_index);
75 /* Poison the entry */
77 memset (sctp_conn, 0xFA, sizeof (*sctp_conn));
79 pool_put_index (tm->listener_pool, listener_index);
83 sctp_session_unbind (u32 listener_index)
85 sctp_connection_unbind (listener_index);
90 sctp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add)
92 sctp_main_t *tm = &sctp_main;
94 tm->punt_unknown4 = is_add;
96 tm->punt_unknown6 = is_add;
100 sctp_alloc_custom_local_endpoint (sctp_main_t * tm, ip46_address_t * lcl_addr,
101 u16 * lcl_port, u8 is_ip4)
106 index = tm->last_v4_address_rotor++;
107 if (tm->last_v4_address_rotor >= vec_len (tm->ip4_src_addresses))
108 tm->last_v4_address_rotor = 0;
109 lcl_addr->ip4.as_u32 = tm->ip4_src_addresses[index].as_u32;
113 index = tm->last_v6_address_rotor++;
114 if (tm->last_v6_address_rotor >= vec_len (tm->ip6_src_addresses))
115 tm->last_v6_address_rotor = 0;
116 clib_memcpy (&lcl_addr->ip6, &tm->ip6_src_addresses[index],
117 sizeof (ip6_address_t));
119 port = transport_alloc_local_port (TRANSPORT_PROTO_SCTP, lcl_addr);
122 clib_warning ("Failed to allocate src port");
130 * Initialize all connection timers as invalid
133 sctp_connection_timers_init (sctp_connection_t * sctp_conn)
137 /* Set all to invalid */
138 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
140 sctp_conn->sub_conn[i].RTO = SCTP_RTO_INIT;
142 for (j = 0; j < SCTP_N_TIMERS; j++)
144 sctp_conn->sub_conn[i].timers[j] = SCTP_TIMER_HANDLE_INVALID;
150 * Stop all connection timers
153 sctp_connection_timers_reset (sctp_connection_t * sctp_conn)
156 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
158 for (j = 0; j < SCTP_N_TIMERS; j++)
159 sctp_timer_reset (sctp_conn, i, j);
163 const char *sctp_fsm_states[] = {
164 #define _(sym, str) str,
165 foreach_sctp_fsm_state
170 format_sctp_state (u8 * s, va_list * args)
172 u32 state = va_arg (*args, u32);
174 if (state < SCTP_N_STATES)
175 s = format (s, "%s", sctp_fsm_states[state]);
177 s = format (s, "UNKNOWN (%d (0x%x))", state, state);
182 format_sctp_connection_id (u8 * s, va_list * args)
184 sctp_connection_t *sctp_conn = va_arg (*args, sctp_connection_t *);
189 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
191 if (sctp_conn->sub_conn[i].connection.is_ip4)
193 s = format (s, "%U[#%d][%s] %U:%d->%U:%d",
195 sctp_conn->sub_conn[i].connection.thread_index,
198 &sctp_conn->sub_conn[i].connection.lcl_ip.ip4,
199 clib_net_to_host_u16 (sctp_conn->sub_conn[i].
200 connection.lcl_port),
202 &sctp_conn->sub_conn[i].connection.rmt_ip.ip4,
203 clib_net_to_host_u16 (sctp_conn->sub_conn[i].
204 connection.rmt_port));
208 s = format (s, "%U[#%d][%s] %U:%d->%U:%d",
210 sctp_conn->sub_conn[i].connection.thread_index,
213 &sctp_conn->sub_conn[i].connection.lcl_ip.ip6,
214 clib_net_to_host_u16 (sctp_conn->sub_conn[i].
215 connection.lcl_port),
217 &sctp_conn->sub_conn[i].connection.rmt_ip.ip6,
218 clib_net_to_host_u16 (sctp_conn->sub_conn[i].
219 connection.rmt_port));
226 format_sctp_connection (u8 * s, va_list * args)
228 sctp_connection_t *sctp_conn = va_arg (*args, sctp_connection_t *);
229 u32 verbose = va_arg (*args, u32);
233 s = format (s, "%-50U", format_sctp_connection_id, sctp_conn);
236 s = format (s, "%-15U", format_sctp_state, sctp_conn->state);
243 * Initialize connection send variables.
246 sctp_init_snd_vars (sctp_connection_t * sctp_conn)
250 * We use the time to randomize iss and for setting up the initial
251 * timestamp. Make sure it's updated otherwise syn and ack in the
252 * handshake may make it look as if time has flown in the opposite
256 sctp_set_time_now (vlib_get_thread_index ());
257 time_now = sctp_time_now ();
259 sctp_conn->local_initial_tsn = random_u32 (&time_now);
260 sctp_conn->last_unacked_tsn = sctp_conn->local_initial_tsn;
261 sctp_conn->next_tsn = sctp_conn->local_initial_tsn + 1;
263 sctp_conn->remote_initial_tsn = 0x0;
264 sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn;
267 always_inline sctp_connection_t *
268 sctp_sub_connection_add (u8 thread_index)
270 sctp_main_t *tm = vnet_get_sctp_main ();
271 sctp_connection_t *sctp_conn = tm->connections[thread_index];
273 sctp_conn->sub_conn[sctp_conn->next_avail_sub_conn].connection.c_index =
274 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.c_index;
275 sctp_conn->sub_conn[sctp_conn->next_avail_sub_conn].
276 connection.thread_index = thread_index;
277 sctp_conn->sub_conn[sctp_conn->next_avail_sub_conn].subconn_idx =
278 sctp_conn->next_avail_sub_conn;
280 sctp_conn->next_avail_sub_conn += 1;
286 sctp_sub_connection_add_ip4 (u8 thread_index,
287 sctp_ipv4_addr_param_t * ipv4_addr)
289 sctp_connection_t *sctp_conn = sctp_sub_connection_add (thread_index);
291 clib_memcpy (&sctp_conn->
292 sub_conn[sctp_conn->next_avail_sub_conn].connection.lcl_ip.ip4,
293 &ipv4_addr->address, sizeof (ipv4_addr->address));
295 sctp_conn->forming_association_changed = 1;
299 sctp_sub_connection_add_ip6 (u8 thread_index,
300 sctp_ipv6_addr_param_t * ipv6_addr)
302 sctp_connection_t *sctp_conn = sctp_sub_connection_add (thread_index);
304 clib_memcpy (&sctp_conn->
305 sub_conn[sctp_conn->next_avail_sub_conn].connection.lcl_ip.ip6,
306 &ipv6_addr->address, sizeof (ipv6_addr->address));
308 sctp_conn->forming_association_changed = 1;
312 sctp_connection_new (u8 thread_index)
314 sctp_main_t *sctp_main = vnet_get_sctp_main ();
315 sctp_connection_t *sctp_conn;
317 pool_get (sctp_main->connections[thread_index], sctp_conn);
318 memset (sctp_conn, 0, sizeof (*sctp_conn));
319 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].subconn_idx =
320 MAIN_SCTP_SUB_CONN_IDX;
321 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_c_index =
322 sctp_conn - sctp_main->connections[thread_index];
323 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_thread_index = thread_index;
324 sctp_conn->local_tag = 0;
325 sctp_conn->next_avail_sub_conn = 1;
331 sctp_half_open_connection_new (u8 thread_index)
333 sctp_main_t *tm = vnet_get_sctp_main ();
334 sctp_connection_t *sctp_conn = 0;
335 ASSERT (vlib_get_thread_index () == 0);
336 pool_get (tm->half_open_connections, sctp_conn);
337 memset (sctp_conn, 0, sizeof (*sctp_conn));
338 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_c_index =
339 sctp_conn - tm->half_open_connections;
340 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].subconn_idx =
341 MAIN_SCTP_SUB_CONN_IDX;
346 sctp_connection_open (transport_endpoint_t * rmt)
348 sctp_main_t *tm = vnet_get_sctp_main ();
349 sctp_connection_t *sctp_conn;
350 ip46_address_t lcl_addr;
355 u8 idx = MAIN_SCTP_SUB_CONN_IDX;
358 * Allocate local endpoint
360 if ((rmt->is_ip4 && vec_len (tm->ip4_src_addresses))
361 || (!rmt->is_ip4 && vec_len (tm->ip6_src_addresses)))
362 rv = sctp_alloc_custom_local_endpoint (tm, &lcl_addr, &lcl_port,
365 rv = transport_alloc_local_endpoint (TRANSPORT_PROTO_SCTP,
366 rmt, &lcl_addr, &lcl_port);
372 * Create connection and send INIT CHUNK
374 thread_id = vlib_get_thread_index ();
375 ASSERT (thread_id == 0);
377 clib_spinlock_lock_if_init (&tm->half_open_lock);
378 sctp_conn = sctp_half_open_connection_new (thread_id);
379 sctp_conn->sub_conn[idx].PMTU =
380 vnet_sw_interface_get_mtu (vnet_get_main (), rmt->sw_if_index, VLIB_TX);
382 transport_connection_t *trans_conn = &sctp_conn->sub_conn[idx].connection;
383 ip_copy (&trans_conn->rmt_ip, &rmt->ip, rmt->is_ip4);
384 ip_copy (&trans_conn->lcl_ip, &lcl_addr, rmt->is_ip4);
385 sctp_conn->sub_conn[idx].subconn_idx = idx;
386 trans_conn->rmt_port = rmt->port;
387 trans_conn->lcl_port = clib_host_to_net_u16 (lcl_port);
388 trans_conn->is_ip4 = rmt->is_ip4;
389 trans_conn->proto = TRANSPORT_PROTO_SCTP;
390 trans_conn->fib_index = rmt->fib_index;
392 sctp_connection_timers_init (sctp_conn);
393 /* The other connection vars will be initialized after INIT_ACK chunk received */
394 sctp_init_snd_vars (sctp_conn);
396 sctp_send_init (sctp_conn);
398 clib_spinlock_unlock_if_init (&tm->half_open_lock);
400 return sctp_conn->sub_conn[idx].connection.c_index;
404 * Cleans up connection state.
409 sctp_connection_cleanup (sctp_connection_t * sctp_conn)
411 sctp_main_t *tm = &sctp_main;
414 /* Cleanup local endpoint if this was an active connect */
415 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
416 transport_endpoint_cleanup (TRANSPORT_PROTO_SCTP,
417 &sctp_conn->sub_conn[i].connection.lcl_ip,
418 sctp_conn->sub_conn[i].connection.lcl_port);
420 /* Check if connection is not yet fully established */
421 if (sctp_conn->state == SCTP_STATE_COOKIE_WAIT)
428 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.thread_index;
430 /* Make sure all timers are cleared */
431 sctp_connection_timers_reset (sctp_conn);
433 /* Poison the entry */
435 memset (sctp_conn, 0xFA, sizeof (*sctp_conn));
436 pool_put (tm->connections[thread_index], sctp_conn);
441 sctp_session_open (transport_endpoint_t * tep)
443 return sctp_connection_open (tep);
447 sctp_check_outstanding_data_chunks (sctp_connection_t * sctp_conn)
450 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
452 if (sctp_conn->sub_conn[i].state == SCTP_SUBCONN_STATE_DOWN)
455 if (sctp_conn->sub_conn[i].is_retransmitting == 1 ||
456 sctp_conn->sub_conn[i].enqueue_state != SCTP_ERROR_ENQUEUED)
459 ("Connection %u has still DATA to be enqueued inboud / outboud",
460 sctp_conn->sub_conn[i].connection.c_index);
465 return 0; /* Indicates no more data to be read/sent */
469 sctp_connection_close (sctp_connection_t * sctp_conn)
471 SCTP_DBG ("Closing connection %u...",
472 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.c_index);
474 sctp_conn->state = SCTP_STATE_SHUTDOWN_PENDING;
476 sctp_send_shutdown (sctp_conn);
480 sctp_session_close (u32 conn_index, u32 thread_index)
482 ASSERT (thread_index == 0);
484 sctp_connection_t *sctp_conn =
485 sctp_connection_get (conn_index, thread_index);
486 if (sctp_conn != NULL)
487 sctp_connection_close (sctp_conn);
491 sctp_session_cleanup (u32 conn_index, u32 thread_index)
493 sctp_connection_t *sctp_conn =
494 sctp_connection_get (conn_index, thread_index);
496 if (sctp_conn != NULL)
498 sctp_connection_timers_reset (sctp_conn);
499 /* Wait for the session tx events to clear */
500 sctp_conn->state = SCTP_STATE_CLOSED;
505 * Compute maximum segment size for session layer.
508 sctp_session_send_mss (transport_connection_t * trans_conn)
510 sctp_connection_t *sctp_conn =
511 sctp_get_connection_from_transport (trans_conn);
513 if (sctp_conn == NULL)
515 SCTP_DBG ("sctp_conn == NULL");
519 update_cwnd (sctp_conn);
520 update_smallest_pmtu_idx (sctp_conn);
522 return sctp_conn->sub_conn[sctp_conn->smallest_PMTU_idx].cwnd;
526 sctp_snd_space (sctp_connection_t * sctp_conn)
528 /* Finally, let's subtract the DATA chunk headers overhead */
529 return sctp_conn->sub_conn[sctp_conn->smallest_PMTU_idx].cwnd -
530 sizeof (sctp_payload_data_chunk_t) - sizeof (sctp_full_hdr_t);
534 * Compute TX window session is allowed to fill.
537 sctp_session_send_space (transport_connection_t * trans_conn)
539 sctp_connection_t *sctp_conn =
540 sctp_get_connection_from_transport (trans_conn);
542 return sctp_snd_space (sctp_conn);
545 transport_connection_t *
546 sctp_session_get_transport (u32 conn_index, u32 thread_index)
548 sctp_connection_t *sctp_conn =
549 sctp_connection_get (conn_index, thread_index);
551 if (PREDICT_TRUE (sctp_conn != NULL))
552 return &sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection;
557 transport_connection_t *
558 sctp_session_get_listener (u32 listener_index)
560 sctp_main_t *tm = vnet_get_sctp_main ();
561 sctp_connection_t *sctp_conn;
562 sctp_conn = pool_elt_at_index (tm->listener_pool, listener_index);
563 return &sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection;
567 format_sctp_session (u8 * s, va_list * args)
569 u32 tci = va_arg (*args, u32);
570 u32 thread_index = va_arg (*args, u32);
571 u32 verbose = va_arg (*args, u32);
572 sctp_connection_t *tc;
574 tc = sctp_connection_get (tci, thread_index);
576 s = format (s, "%U", format_sctp_connection, tc, verbose);
578 s = format (s, "empty\n");
583 format_sctp_listener_session (u8 * s, va_list * args)
585 u32 tci = va_arg (*args, u32);
586 sctp_connection_t *tc = sctp_listener_get (tci);
587 return format (s, "%U", format_sctp_connection_id, tc);
591 sctp_expired_timers_cb (u32 conn_index, u32 timer_id)
593 sctp_connection_t *sctp_conn;
595 sctp_conn = sctp_connection_get (conn_index, vlib_get_thread_index ());
596 /* note: the connection may have already disappeared */
597 if (PREDICT_FALSE (sctp_conn == 0))
600 SCTP_DBG ("%s expired", sctp_timer_to_string (timer_id));
604 case SCTP_TIMER_T1_INIT:
605 case SCTP_TIMER_T1_COOKIE:
606 case SCTP_TIMER_T2_SHUTDOWN:
607 case SCTP_TIMER_T3_RXTX:
608 sctp_timer_reset (sctp_conn, conn_index, timer_id);
610 case SCTP_TIMER_T4_HEARTBEAT:
611 sctp_timer_reset (sctp_conn, conn_index, timer_id);
615 if (sctp_conn->sub_conn[conn_index].unacknowledged_hb >
616 SCTP_PATH_MAX_RETRANS)
618 // The remote-peer is considered to be unreachable hence shutting down
619 u8 i, total_subs_down = 1;
620 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
622 if (sctp_conn->sub_conn[i].state == SCTP_SUBCONN_STATE_DOWN)
625 u32 now = sctp_time_now ();
626 if (now > (sctp_conn->sub_conn[i].last_seen + SCTP_HB_INTERVAL))
628 total_subs_down += 1;
629 sctp_conn->sub_conn[i].state = SCTP_SUBCONN_STATE_DOWN;
633 if (total_subs_down == MAX_SCTP_CONNECTIONS)
635 /* Start cleanup. App wasn't notified yet so use delete notify as
636 * opposed to delete to cleanup session layer state. */
637 stream_session_delete_notify (&sctp_conn->sub_conn
638 [MAIN_SCTP_SUB_CONN_IDX].connection);
640 sctp_connection_timers_reset (sctp_conn);
642 sctp_connection_cleanup (sctp_conn);
648 sctp_send_heartbeat (sctp_conn);
652 sctp_expired_timers_dispatch (u32 * expired_timers)
655 u32 connection_index, timer_id;
657 for (i = 0; i < vec_len (expired_timers); i++)
659 /* Get session index and timer id */
660 connection_index = expired_timers[i] & 0x0FFFFFFF;
661 timer_id = expired_timers[i] >> 28;
663 SCTP_DBG ("Expired timer ID: %u", timer_id);
665 /* Handle expiration */
666 sctp_expired_timers_cb (connection_index, timer_id);
671 sctp_initialize_timer_wheels (sctp_main_t * tm)
673 tw_timer_wheel_16t_2w_512sl_t *tw;
675 foreach_vlib_main (({
676 tw = &tm->timer_wheels[ii];
677 tw_timer_wheel_init_16t_2w_512sl (tw, sctp_expired_timers_dispatch,
678 100e-3 /* timer period 100ms */ , ~0);
679 tw->last_run_time = vlib_time_now (this_vlib_main);
685 sctp_main_enable (vlib_main_t * vm)
687 sctp_main_t *tm = vnet_get_sctp_main ();
688 vlib_thread_main_t *vtm = vlib_get_thread_main ();
689 clib_error_t *error = 0;
692 sctp_connection_t *sctp_conn __attribute__ ((unused));
693 u32 preallocated_connections_per_thread;
695 if ((error = vlib_call_init_function (vm, ip_main_init)))
697 if ((error = vlib_call_init_function (vm, ip4_lookup_init)))
699 if ((error = vlib_call_init_function (vm, ip6_lookup_init)))
706 ip4_register_protocol (IP_PROTOCOL_SCTP, sctp4_input_node.index);
707 ip6_register_protocol (IP_PROTOCOL_SCTP, sctp6_input_node.index);
710 * Initialize data structures
713 num_threads = 1 /* main thread */ + vtm->n_threads;
714 vec_validate (tm->connections, num_threads - 1);
717 * Preallocate connections. Assume that thread 0 won't
718 * use preallocated threads when running multi-core
720 if (num_threads == 1)
723 preallocated_connections_per_thread = tm->preallocated_connections;
728 preallocated_connections_per_thread =
729 tm->preallocated_connections / (num_threads - 1);
731 for (; thread < num_threads; thread++)
733 if (preallocated_connections_per_thread)
734 pool_init_fixed (tm->connections[thread],
735 preallocated_connections_per_thread);
738 /* Initialize per worker thread tx buffers (used for control messages) */
739 vec_validate (tm->tx_buffers, num_threads - 1);
741 /* Initialize timer wheels */
742 vec_validate (tm->timer_wheels, num_threads - 1);
743 sctp_initialize_timer_wheels (tm);
745 /* Initialize clocks per tick for SCTP timestamp. Used to compute
746 * monotonically increasing timestamps. */
747 tm->tstamp_ticks_per_clock = vm->clib_time.seconds_per_clock
748 / SCTP_TSTAMP_RESOLUTION;
752 clib_spinlock_init (&tm->half_open_lock);
755 vec_validate (tm->tx_frames[0], num_threads - 1);
756 vec_validate (tm->tx_frames[1], num_threads - 1);
757 vec_validate (tm->ip_lookup_tx_frames[0], num_threads - 1);
758 vec_validate (tm->ip_lookup_tx_frames[1], num_threads - 1);
760 tm->bytes_per_buffer = vlib_buffer_free_list_buffer_size
761 (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
763 vec_validate (tm->time_now, num_threads - 1);
768 sctp_enable_disable (vlib_main_t * vm, u8 is_en)
772 if (sctp_main.is_enabled)
775 return sctp_main_enable (vm);
779 sctp_main.is_enabled = 0;
785 transport_connection_t *
786 sctp_half_open_session_get_transport (u32 conn_index)
788 sctp_connection_t *sctp_conn = sctp_half_open_connection_get (conn_index);
789 return &sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection;
793 format_sctp_half_open (u8 * s, va_list * args)
795 u32 tci = va_arg (*args, u32);
796 sctp_connection_t *sctp_conn = sctp_half_open_connection_get (tci);
797 return format (s, "%U", format_sctp_connection_id, sctp_conn);
801 sctp_update_time (f64 now, u8 thread_index)
803 sctp_set_time_now (thread_index);
804 tw_timer_expire_timers_16t_2w_512sl (&sctp_main.timer_wheels[thread_index],
806 sctp_flush_frames_to_output (thread_index);
810 const static transport_proto_vft_t sctp_proto = {
811 .enable = sctp_enable_disable,
812 .bind = sctp_session_bind,
813 .unbind = sctp_session_unbind,
814 .open = sctp_session_open,
815 .close = sctp_session_close,
816 .cleanup = sctp_session_cleanup,
817 .push_header = sctp_push_header,
818 .send_mss = sctp_session_send_mss,
819 .send_space = sctp_session_send_space,
820 .update_time = sctp_update_time,
821 .get_connection = sctp_session_get_transport,
822 .get_listener = sctp_session_get_listener,
823 .get_half_open = sctp_half_open_session_get_transport,
824 .format_connection = format_sctp_session,
825 .format_listener = format_sctp_listener_session,
826 .format_half_open = format_sctp_half_open,
832 sctp_init (vlib_main_t * vm)
834 sctp_main_t *tm = vnet_get_sctp_main ();
835 ip_main_t *im = &ip_main;
836 ip_protocol_info_t *pi;
837 /* Session layer, and by implication SCTP, are disabled by default */
840 /* Register with IP for header parsing */
841 pi = ip_get_protocol_info (im, IP_PROTOCOL_SCTP);
843 return clib_error_return (0, "SCTP protocol info AWOL");
844 pi->format_header = format_sctp_header;
845 pi->unformat_pg_edit = unformat_pg_sctp_header;
847 /* Register as transport with session layer */
848 transport_register_protocol (TRANSPORT_PROTO_SCTP, &sctp_proto,
849 FIB_PROTOCOL_IP4, sctp4_output_node.index);
850 transport_register_protocol (TRANSPORT_PROTO_SCTP, &sctp_proto,
851 FIB_PROTOCOL_IP6, sctp6_output_node.index);
856 VLIB_INIT_FUNCTION (sctp_init);
859 * fd.io coding-style-patch-verification: ON
862 * eval: (c-set-style "gnu")