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 u8 subconn_idx = sctp_next_avail_subconn (sctp_conn);
275 ASSERT (subconn_idx < MAX_SCTP_CONNECTIONS);
277 sctp_conn->sub_conn[subconn_idx].connection.c_index =
278 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.c_index;
279 sctp_conn->sub_conn[subconn_idx].connection.thread_index = thread_index;
280 sctp_conn->sub_conn[subconn_idx].subconn_idx = subconn_idx;
286 sctp_sub_connection_add_ip4 (vlib_main_t * vm,
287 ip4_address_t * lcl_addr,
288 ip4_address_t * rmt_addr)
290 sctp_connection_t *sctp_conn = sctp_sub_connection_add (vm->thread_index);
292 u8 subconn_idx = sctp_next_avail_subconn (sctp_conn);
294 if (subconn_idx == MAX_SCTP_CONNECTIONS)
295 return SCTP_ERROR_MAX_CONNECTIONS;
297 clib_memcpy (&sctp_conn->sub_conn[subconn_idx].connection.lcl_ip,
298 &lcl_addr, sizeof (lcl_addr));
300 clib_memcpy (&sctp_conn->sub_conn[subconn_idx].connection.rmt_ip,
301 &rmt_addr, sizeof (rmt_addr));
303 sctp_conn->forming_association_changed = 1;
305 return SCTP_ERROR_NONE;
309 sctp_sub_connection_del_ip4 (ip4_address_t * lcl_addr,
310 ip4_address_t * rmt_addr)
312 sctp_main_t *sctp_main = vnet_get_sctp_main ();
314 u32 thread_idx = vlib_get_thread_index ();
317 ASSERT (thread_idx == 0);
319 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
321 sctp_connection_t *sctp_conn = sctp_main->connections[thread_idx];
322 sctp_sub_connection_t *sub_conn =
323 &sctp_main->connections[thread_idx]->sub_conn[i];
324 ip46_address_t *lcl_ip =
325 &sctp_main->connections[thread_idx]->sub_conn[i].connection.lcl_ip;
326 ip46_address_t *rmt_ip =
327 &sctp_main->connections[thread_idx]->sub_conn[i].connection.rmt_ip;
329 if (!sub_conn->connection.is_ip4)
331 if (lcl_ip->ip4.as_u32 == lcl_addr->as_u32 &&
332 rmt_ip->ip4.as_u32 == rmt_addr->as_u32)
334 sub_conn->state = SCTP_SUBCONN_STATE_DOWN;
335 sctp_conn->forming_association_changed = 1;
339 return SCTP_ERROR_NONE;
343 sctp_sub_connection_add_ip6 (vlib_main_t * vm,
344 ip6_address_t * lcl_addr,
345 ip6_address_t * rmt_addr)
347 sctp_connection_t *sctp_conn = sctp_sub_connection_add (vm->thread_index);
349 u8 subconn_idx = sctp_next_avail_subconn (sctp_conn);
351 if (subconn_idx == MAX_SCTP_CONNECTIONS)
352 return SCTP_ERROR_MAX_CONNECTIONS;
354 clib_memcpy (&sctp_conn->sub_conn[subconn_idx].connection.lcl_ip,
355 &lcl_addr, sizeof (lcl_addr));
357 clib_memcpy (&sctp_conn->sub_conn[subconn_idx].connection.rmt_ip,
358 &rmt_addr, sizeof (rmt_addr));
360 sctp_conn->forming_association_changed = 1;
362 return SCTP_ERROR_NONE;
366 sctp_sub_connection_del_ip6 (ip6_address_t * lcl_addr,
367 ip6_address_t * rmt_addr)
369 sctp_main_t *sctp_main = vnet_get_sctp_main ();
371 u32 thread_idx = vlib_get_thread_index ();
374 ASSERT (thread_idx == 0);
376 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
378 sctp_connection_t *sctp_conn = sctp_main->connections[thread_idx];
379 sctp_sub_connection_t *sub_conn =
380 &sctp_main->connections[thread_idx]->sub_conn[i];
381 ip46_address_t *lcl_ip =
382 &sctp_main->connections[thread_idx]->sub_conn[i].connection.lcl_ip;
383 ip46_address_t *rmt_ip =
384 &sctp_main->connections[thread_idx]->sub_conn[i].connection.rmt_ip;
386 if (!sub_conn->connection.is_ip4)
388 if ((lcl_ip->ip6.as_u64[0] == lcl_addr->as_u64[0]
389 && lcl_ip->ip6.as_u64[1] == lcl_addr->as_u64[1])
390 && (rmt_ip->ip6.as_u64[0] == rmt_addr->as_u64[0]
391 && rmt_ip->ip6.as_u64[1] == rmt_addr->as_u64[1]))
393 sub_conn->state = SCTP_SUBCONN_STATE_DOWN;
394 sctp_conn->forming_association_changed = 1;
398 return SCTP_ERROR_NONE;
402 sctp_connection_new (u8 thread_index)
404 sctp_main_t *sctp_main = vnet_get_sctp_main ();
405 sctp_connection_t *sctp_conn;
407 pool_get (sctp_main->connections[thread_index], sctp_conn);
408 memset (sctp_conn, 0, sizeof (*sctp_conn));
409 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].subconn_idx =
410 MAIN_SCTP_SUB_CONN_IDX;
411 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_c_index =
412 sctp_conn - sctp_main->connections[thread_index];
413 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_thread_index = thread_index;
414 sctp_conn->local_tag = 0;
420 sctp_half_open_connection_new (u8 thread_index)
422 sctp_main_t *tm = vnet_get_sctp_main ();
423 sctp_connection_t *sctp_conn = 0;
424 ASSERT (vlib_get_thread_index () == 0);
425 pool_get (tm->half_open_connections, sctp_conn);
426 memset (sctp_conn, 0, sizeof (*sctp_conn));
427 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_c_index =
428 sctp_conn - tm->half_open_connections;
429 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].subconn_idx =
430 MAIN_SCTP_SUB_CONN_IDX;
435 sctp_connection_open (transport_endpoint_t * rmt)
437 sctp_main_t *tm = vnet_get_sctp_main ();
438 sctp_connection_t *sctp_conn;
439 ip46_address_t lcl_addr;
444 u8 idx = MAIN_SCTP_SUB_CONN_IDX;
447 * Allocate local endpoint
449 if ((rmt->is_ip4 && vec_len (tm->ip4_src_addresses))
450 || (!rmt->is_ip4 && vec_len (tm->ip6_src_addresses)))
451 rv = sctp_alloc_custom_local_endpoint (tm, &lcl_addr, &lcl_port,
454 rv = transport_alloc_local_endpoint (TRANSPORT_PROTO_SCTP,
455 rmt, &lcl_addr, &lcl_port);
461 * Create connection and send INIT CHUNK
463 thread_id = vlib_get_thread_index ();
464 ASSERT (thread_id == 0);
466 clib_spinlock_lock_if_init (&tm->half_open_lock);
467 sctp_conn = sctp_half_open_connection_new (thread_id);
468 sctp_conn->sub_conn[idx].PMTU =
469 vnet_sw_interface_get_mtu (vnet_get_main (), rmt->sw_if_index, VLIB_TX);
471 transport_connection_t *trans_conn = &sctp_conn->sub_conn[idx].connection;
472 ip_copy (&trans_conn->rmt_ip, &rmt->ip, rmt->is_ip4);
473 ip_copy (&trans_conn->lcl_ip, &lcl_addr, rmt->is_ip4);
474 sctp_conn->sub_conn[idx].subconn_idx = idx;
475 trans_conn->rmt_port = rmt->port;
476 trans_conn->lcl_port = clib_host_to_net_u16 (lcl_port);
477 trans_conn->is_ip4 = rmt->is_ip4;
478 trans_conn->proto = TRANSPORT_PROTO_SCTP;
479 trans_conn->fib_index = rmt->fib_index;
481 sctp_connection_timers_init (sctp_conn);
482 /* The other connection vars will be initialized after INIT_ACK chunk received */
483 sctp_init_snd_vars (sctp_conn);
485 sctp_send_init (sctp_conn);
487 clib_spinlock_unlock_if_init (&tm->half_open_lock);
489 return sctp_conn->sub_conn[idx].connection.c_index;
493 * Cleans up connection state.
498 sctp_connection_cleanup (sctp_connection_t * sctp_conn)
500 sctp_main_t *tm = &sctp_main;
503 /* Cleanup local endpoint if this was an active connect */
504 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
505 transport_endpoint_cleanup (TRANSPORT_PROTO_SCTP,
506 &sctp_conn->sub_conn[i].connection.lcl_ip,
507 sctp_conn->sub_conn[i].connection.lcl_port);
510 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.thread_index;
512 /* Make sure all timers are cleared */
513 sctp_connection_timers_reset (sctp_conn);
515 /* Poison the entry */
517 memset (sctp_conn, 0xFA, sizeof (*sctp_conn));
518 pool_put (tm->connections[thread_index], sctp_conn);
522 sctp_session_open (transport_endpoint_t * tep)
524 return sctp_connection_open (tep);
528 sctp_check_outstanding_data_chunks (sctp_connection_t * sctp_conn)
531 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
533 if (sctp_conn->sub_conn[i].state == SCTP_SUBCONN_STATE_DOWN)
536 if (sctp_conn->sub_conn[i].is_retransmitting == 1 ||
537 sctp_conn->sub_conn[i].enqueue_state != SCTP_ERROR_ENQUEUED)
540 ("Connection %u has still DATA to be enqueued inboud / outboud",
541 sctp_conn->sub_conn[i].connection.c_index);
546 return 0; /* Indicates no more data to be read/sent */
550 sctp_connection_close (sctp_connection_t * sctp_conn)
552 SCTP_DBG ("Closing connection %u...",
553 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.c_index);
555 sctp_conn->state = SCTP_STATE_SHUTDOWN_PENDING;
557 sctp_send_shutdown (sctp_conn);
561 sctp_session_close (u32 conn_index, u32 thread_index)
563 ASSERT (thread_index == 0);
565 sctp_connection_t *sctp_conn =
566 sctp_connection_get (conn_index, thread_index);
567 if (sctp_conn != NULL)
568 sctp_connection_close (sctp_conn);
572 sctp_session_cleanup (u32 conn_index, u32 thread_index)
574 sctp_connection_t *sctp_conn =
575 sctp_connection_get (conn_index, thread_index);
577 if (sctp_conn != NULL)
579 sctp_connection_timers_reset (sctp_conn);
580 /* Wait for the session tx events to clear */
581 sctp_conn->state = SCTP_STATE_CLOSED;
586 * Compute maximum segment size for session layer.
589 sctp_session_send_mss (transport_connection_t * trans_conn)
591 sctp_connection_t *sctp_conn =
592 sctp_get_connection_from_transport (trans_conn);
594 if (sctp_conn == NULL)
596 SCTP_DBG ("sctp_conn == NULL");
600 update_cwnd (sctp_conn);
601 update_smallest_pmtu_idx (sctp_conn);
603 return sctp_conn->sub_conn[sctp_conn->smallest_PMTU_idx].cwnd;
607 sctp_snd_space (sctp_connection_t * sctp_conn)
609 /* Finally, let's subtract the DATA chunk headers overhead */
610 return sctp_conn->sub_conn[sctp_conn->smallest_PMTU_idx].cwnd -
611 sizeof (sctp_payload_data_chunk_t) - sizeof (sctp_full_hdr_t);
615 * Compute TX window session is allowed to fill.
618 sctp_session_send_space (transport_connection_t * trans_conn)
620 sctp_connection_t *sctp_conn =
621 sctp_get_connection_from_transport (trans_conn);
623 return sctp_snd_space (sctp_conn);
626 transport_connection_t *
627 sctp_session_get_transport (u32 conn_index, u32 thread_index)
629 sctp_connection_t *sctp_conn =
630 sctp_connection_get (conn_index, thread_index);
632 if (PREDICT_TRUE (sctp_conn != NULL))
633 return &sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection;
638 transport_connection_t *
639 sctp_session_get_listener (u32 listener_index)
641 sctp_main_t *tm = vnet_get_sctp_main ();
642 sctp_connection_t *sctp_conn;
643 sctp_conn = pool_elt_at_index (tm->listener_pool, listener_index);
644 return &sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection;
648 format_sctp_session (u8 * s, va_list * args)
650 u32 tci = va_arg (*args, u32);
651 u32 thread_index = va_arg (*args, u32);
652 u32 verbose = va_arg (*args, u32);
653 sctp_connection_t *tc;
655 tc = sctp_connection_get (tci, thread_index);
657 s = format (s, "%U", format_sctp_connection, tc, verbose);
659 s = format (s, "empty\n");
664 format_sctp_listener_session (u8 * s, va_list * args)
666 u32 tci = va_arg (*args, u32);
667 sctp_connection_t *tc = sctp_listener_get (tci);
668 return format (s, "%U", format_sctp_connection_id, tc);
672 sctp_expired_timers_cb (u32 conn_index, u32 timer_id)
674 sctp_connection_t *sctp_conn;
676 sctp_conn = sctp_connection_get (conn_index, vlib_get_thread_index ());
677 /* note: the connection may have already disappeared */
678 if (PREDICT_FALSE (sctp_conn == 0))
681 SCTP_DBG ("%s expired", sctp_timer_to_string (timer_id));
683 if (sctp_conn->sub_conn[conn_index].unacknowledged_hb >
684 SCTP_PATH_MAX_RETRANS)
686 // The remote-peer is considered to be unreachable hence shutting down
687 u8 i, total_subs_down = 1;
688 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
690 if (sctp_conn->sub_conn[i].state == SCTP_SUBCONN_STATE_DOWN)
693 u32 now = sctp_time_now ();
694 if (now > (sctp_conn->sub_conn[i].last_seen + SCTP_HB_INTERVAL))
696 total_subs_down += 1;
697 sctp_conn->sub_conn[i].state = SCTP_SUBCONN_STATE_DOWN;
701 if (total_subs_down == MAX_SCTP_CONNECTIONS)
703 /* Start cleanup. App wasn't notified yet so use delete notify as
704 * opposed to delete to cleanup session layer state. */
705 stream_session_delete_notify (&sctp_conn->sub_conn
706 [MAIN_SCTP_SUB_CONN_IDX].connection);
708 sctp_connection_timers_reset (sctp_conn);
710 sctp_connection_cleanup (sctp_conn);
717 case SCTP_TIMER_T1_INIT:
718 sctp_send_init (sctp_conn);
720 case SCTP_TIMER_T1_COOKIE:
721 sctp_send_cookie_echo (sctp_conn);
723 case SCTP_TIMER_T2_SHUTDOWN:
724 sctp_send_shutdown (sctp_conn);
726 case SCTP_TIMER_T3_RXTX:
727 sctp_timer_reset (sctp_conn, conn_index, timer_id);
728 sctp_data_retransmit (sctp_conn);
730 case SCTP_TIMER_T4_HEARTBEAT:
731 sctp_timer_reset (sctp_conn, conn_index, timer_id);
737 sctp_send_heartbeat (sctp_conn);
741 sctp_expired_timers_dispatch (u32 * expired_timers)
744 u32 connection_index, timer_id;
746 for (i = 0; i < vec_len (expired_timers); i++)
748 /* Get session index and timer id */
749 connection_index = expired_timers[i] & 0x0FFFFFFF;
750 timer_id = expired_timers[i] >> 28;
752 SCTP_DBG ("Expired timer ID: %u", timer_id);
754 /* Handle expiration */
755 sctp_expired_timers_cb (connection_index, timer_id);
760 sctp_initialize_timer_wheels (sctp_main_t * tm)
762 tw_timer_wheel_16t_2w_512sl_t *tw;
764 foreach_vlib_main (({
765 tw = &tm->timer_wheels[ii];
766 tw_timer_wheel_init_16t_2w_512sl (tw, sctp_expired_timers_dispatch,
767 100e-3 /* timer period 100ms */ , ~0);
768 tw->last_run_time = vlib_time_now (this_vlib_main);
774 sctp_main_enable (vlib_main_t * vm)
776 sctp_main_t *tm = vnet_get_sctp_main ();
777 vlib_thread_main_t *vtm = vlib_get_thread_main ();
778 clib_error_t *error = 0;
781 sctp_connection_t *sctp_conn __attribute__ ((unused));
782 u32 preallocated_connections_per_thread;
784 if ((error = vlib_call_init_function (vm, ip_main_init)))
786 if ((error = vlib_call_init_function (vm, ip4_lookup_init)))
788 if ((error = vlib_call_init_function (vm, ip6_lookup_init)))
795 ip4_register_protocol (IP_PROTOCOL_SCTP, sctp4_input_node.index);
796 ip6_register_protocol (IP_PROTOCOL_SCTP, sctp6_input_node.index);
799 * Initialize data structures
802 num_threads = 1 /* main thread */ + vtm->n_threads;
803 vec_validate (tm->connections, num_threads - 1);
806 * Preallocate connections. Assume that thread 0 won't
807 * use preallocated threads when running multi-core
809 if (num_threads == 1)
812 preallocated_connections_per_thread = tm->preallocated_connections;
817 preallocated_connections_per_thread =
818 tm->preallocated_connections / (num_threads - 1);
820 for (; thread < num_threads; thread++)
822 if (preallocated_connections_per_thread)
823 pool_init_fixed (tm->connections[thread],
824 preallocated_connections_per_thread);
827 /* Initialize per worker thread tx buffers (used for control messages) */
828 vec_validate (tm->tx_buffers, num_threads - 1);
830 /* Initialize timer wheels */
831 vec_validate (tm->timer_wheels, num_threads - 1);
832 sctp_initialize_timer_wheels (tm);
834 /* Initialize clocks per tick for SCTP timestamp. Used to compute
835 * monotonically increasing timestamps. */
836 tm->tstamp_ticks_per_clock = vm->clib_time.seconds_per_clock
837 / SCTP_TSTAMP_RESOLUTION;
841 clib_spinlock_init (&tm->half_open_lock);
844 vec_validate (tm->tx_frames[0], num_threads - 1);
845 vec_validate (tm->tx_frames[1], num_threads - 1);
846 vec_validate (tm->ip_lookup_tx_frames[0], num_threads - 1);
847 vec_validate (tm->ip_lookup_tx_frames[1], num_threads - 1);
849 tm->bytes_per_buffer = vlib_buffer_free_list_buffer_size
850 (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
852 vec_validate (tm->time_now, num_threads - 1);
857 sctp_enable_disable (vlib_main_t * vm, u8 is_en)
861 if (sctp_main.is_enabled)
864 return sctp_main_enable (vm);
868 sctp_main.is_enabled = 0;
874 transport_connection_t *
875 sctp_half_open_session_get_transport (u32 conn_index)
877 sctp_connection_t *sctp_conn = sctp_half_open_connection_get (conn_index);
878 return &sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection;
882 format_sctp_half_open (u8 * s, va_list * args)
884 u32 tci = va_arg (*args, u32);
885 sctp_connection_t *sctp_conn = sctp_half_open_connection_get (tci);
886 return format (s, "%U", format_sctp_connection_id, sctp_conn);
890 sctp_update_time (f64 now, u8 thread_index)
892 sctp_set_time_now (thread_index);
893 tw_timer_expire_timers_16t_2w_512sl (&sctp_main.timer_wheels[thread_index],
895 sctp_flush_frames_to_output (thread_index);
899 const static transport_proto_vft_t sctp_proto = {
900 .enable = sctp_enable_disable,
901 .bind = sctp_session_bind,
902 .unbind = sctp_session_unbind,
903 .open = sctp_session_open,
904 .close = sctp_session_close,
905 .cleanup = sctp_session_cleanup,
906 .push_header = sctp_push_header,
907 .send_mss = sctp_session_send_mss,
908 .send_space = sctp_session_send_space,
909 .update_time = sctp_update_time,
910 .get_connection = sctp_session_get_transport,
911 .get_listener = sctp_session_get_listener,
912 .get_half_open = sctp_half_open_session_get_transport,
913 .format_connection = format_sctp_session,
914 .format_listener = format_sctp_listener_session,
915 .format_half_open = format_sctp_half_open,
916 .tx_type = TRANSPORT_TX_DEQUEUE,
917 .service_type = TRANSPORT_SERVICE_VC,
923 sctp_init (vlib_main_t * vm)
925 sctp_main_t *tm = vnet_get_sctp_main ();
926 ip_main_t *im = &ip_main;
927 ip_protocol_info_t *pi;
928 /* Session layer, and by implication SCTP, are disabled by default */
931 /* Register with IP for header parsing */
932 pi = ip_get_protocol_info (im, IP_PROTOCOL_SCTP);
934 return clib_error_return (0, "SCTP protocol info AWOL");
935 pi->format_header = format_sctp_header;
936 pi->unformat_pg_edit = unformat_pg_sctp_header;
938 /* Register as transport with session layer */
939 transport_register_protocol (TRANSPORT_PROTO_SCTP, &sctp_proto,
940 FIB_PROTOCOL_IP4, sctp4_output_node.index);
941 transport_register_protocol (TRANSPORT_PROTO_SCTP, &sctp_proto,
942 FIB_PROTOCOL_IP6, sctp6_output_node.index);
944 sctp_api_reference ();
949 VLIB_INIT_FUNCTION (sctp_init);
952 * fd.io coding-style-patch-verification: ON
955 * eval: (c-set-style "gnu")