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>
17 #include <vppinfra/random.h>
18 #include <openssl/hmac.h>
20 vlib_node_registration_t sctp4_output_node;
21 vlib_node_registration_t sctp6_output_node;
23 typedef enum _sctp_output_next
25 SCTP_OUTPUT_NEXT_DROP,
26 SCTP_OUTPUT_NEXT_IP_LOOKUP,
30 #define foreach_sctp4_output_next \
31 _ (DROP, "error-drop") \
32 _ (IP_LOOKUP, "ip4-lookup")
34 #define foreach_sctp6_output_next \
35 _ (DROP, "error-drop") \
36 _ (IP_LOOKUP, "ip6-lookup")
38 static char *sctp_error_strings[] = {
39 #define sctp_error(n,s) s,
40 #include <vnet/sctp/sctp_error.def>
46 sctp_header_t sctp_header;
47 sctp_connection_t sctp_connection;
51 * Flush tx frame populated by retransmits and timer pops
54 sctp_flush_frame_to_output (vlib_main_t * vm, u8 thread_index, u8 is_ip4)
56 if (sctp_main.tx_frames[!is_ip4][thread_index])
59 next_index = is_ip4 ? sctp4_output_node.index : sctp6_output_node.index;
60 vlib_put_frame_to_node (vm, next_index,
61 sctp_main.tx_frames[!is_ip4][thread_index]);
62 sctp_main.tx_frames[!is_ip4][thread_index] = 0;
67 * Flush ip lookup tx frames populated by timer pops
70 sctp_flush_frame_to_ip_lookup (vlib_main_t * vm, u8 thread_index, u8 is_ip4)
72 if (sctp_main.ip_lookup_tx_frames[!is_ip4][thread_index])
75 next_index = is_ip4 ? ip4_lookup_node.index : ip6_lookup_node.index;
76 vlib_put_frame_to_node (vm, next_index,
77 sctp_main.ip_lookup_tx_frames[!is_ip4]
79 sctp_main.ip_lookup_tx_frames[!is_ip4][thread_index] = 0;
84 * Flush v4 and v6 sctp and ip-lookup tx frames for thread index
87 sctp_flush_frames_to_output (u8 thread_index)
89 vlib_main_t *vm = vlib_get_main ();
90 sctp_flush_frame_to_output (vm, thread_index, 1);
91 sctp_flush_frame_to_output (vm, thread_index, 0);
92 sctp_flush_frame_to_ip_lookup (vm, thread_index, 1);
93 sctp_flush_frame_to_ip_lookup (vm, thread_index, 0);
97 ip4_sctp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
101 u32 ip_header_length, payload_length_host_byte_order;
102 u32 n_this_buffer, n_bytes_left, n_ip_bytes_this_buffer;
103 void *data_this_buffer;
105 /* Initialize checksum with ip header. */
106 ip_header_length = ip4_header_bytes (ip0);
107 payload_length_host_byte_order =
108 clib_net_to_host_u16 (ip0->length) - ip_header_length;
110 clib_host_to_net_u32 (payload_length_host_byte_order +
111 (ip0->protocol << 16));
113 if (BITS (uword) == 32)
116 ip_csum_with_carry (checksum,
117 clib_mem_unaligned (&ip0->src_address, u32));
119 ip_csum_with_carry (checksum,
120 clib_mem_unaligned (&ip0->dst_address, u32));
124 ip_csum_with_carry (checksum,
125 clib_mem_unaligned (&ip0->src_address, u64));
127 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
128 data_this_buffer = (void *) ip0 + ip_header_length;
129 n_ip_bytes_this_buffer =
130 p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data);
131 if (n_this_buffer + ip_header_length > n_ip_bytes_this_buffer)
133 n_this_buffer = n_ip_bytes_this_buffer > ip_header_length ?
134 n_ip_bytes_this_buffer - ip_header_length : 0;
139 ip_incremental_checksum (checksum, data_this_buffer, n_this_buffer);
140 n_bytes_left -= n_this_buffer;
141 if (n_bytes_left == 0)
144 ASSERT (p0->flags & VLIB_BUFFER_NEXT_PRESENT);
145 p0 = vlib_get_buffer (vm, p0->next_buffer);
146 data_this_buffer = vlib_buffer_get_current (p0);
147 n_this_buffer = p0->current_length;
154 ip6_sctp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
155 ip6_header_t * ip0, int *bogus_lengthp)
158 u16 payload_length_host_byte_order;
159 u32 i, n_this_buffer, n_bytes_left;
160 u32 headers_size = sizeof (ip0[0]);
161 void *data_this_buffer;
163 ASSERT (bogus_lengthp);
166 /* Initialize checksum with ip header. */
167 checksum = ip0->payload_length + clib_host_to_net_u16 (ip0->protocol);
168 payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
169 data_this_buffer = (void *) (ip0 + 1);
171 for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
173 checksum = ip_csum_with_carry (checksum,
174 clib_mem_unaligned (&ip0->
178 ip_csum_with_carry (checksum,
179 clib_mem_unaligned (&ip0->dst_address.as_uword[i],
183 /* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
184 * or UDP-Ping packets */
185 if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
188 ip6_hop_by_hop_ext_t *ext_hdr =
189 (ip6_hop_by_hop_ext_t *) data_this_buffer;
191 /* validate really icmp6 next */
192 ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_SCTP));
194 skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
195 data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
197 payload_length_host_byte_order -= skip_bytes;
198 headers_size += skip_bytes;
201 n_bytes_left = n_this_buffer = payload_length_host_byte_order;
202 if (p0 && n_this_buffer + headers_size > p0->current_length)
205 headers_size ? p0->current_length - headers_size : 0;
209 ip_incremental_checksum (checksum, data_this_buffer, n_this_buffer);
210 n_bytes_left -= n_this_buffer;
211 if (n_bytes_left == 0)
214 if (!(p0->flags & VLIB_BUFFER_NEXT_PRESENT))
219 p0 = vlib_get_buffer (vm, p0->next_buffer);
220 data_this_buffer = vlib_buffer_get_current (p0);
221 n_this_buffer = p0->current_length;
228 sctp_push_ip_hdr (sctp_main_t * tm, sctp_sub_connection_t * sctp_sub_conn,
231 sctp_header_t *th = vlib_buffer_get_current (b);
232 vlib_main_t *vm = vlib_get_main ();
233 if (sctp_sub_conn->c_is_ip4)
236 ih = vlib_buffer_push_ip4 (vm, b, &sctp_sub_conn->c_lcl_ip4,
237 &sctp_sub_conn->c_rmt_ip4, IP_PROTOCOL_SCTP,
239 th->checksum = ip4_sctp_compute_checksum (vm, b, ih);
246 ih = vlib_buffer_push_ip6 (vm, b, &sctp_sub_conn->c_lcl_ip6,
247 &sctp_sub_conn->c_rmt_ip6, IP_PROTOCOL_SCTP);
248 th->checksum = ip6_sctp_compute_checksum (vm, b, ih, &bogus);
254 sctp_reuse_buffer (vlib_main_t * vm, vlib_buffer_t * b)
256 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
257 vlib_buffer_free_one (vm, b->next_buffer);
258 /* Zero all flags but free list index and trace flag */
259 b->flags &= VLIB_BUFFER_NEXT_PRESENT - 1;
261 b->current_length = 0;
262 b->total_length_not_including_first_buffer = 0;
263 vnet_buffer (b)->sctp.flags = 0;
264 vnet_buffer (b)->sctp.subconn_idx = MAX_SCTP_CONNECTIONS;
266 /* Leave enough space for headers */
267 return vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
271 sctp_init_buffer (vlib_main_t * vm, vlib_buffer_t * b)
273 ASSERT ((b->flags & VLIB_BUFFER_NEXT_PRESENT) == 0);
274 b->flags &= VLIB_BUFFER_NON_DEFAULT_FREELIST;
275 b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
276 b->total_length_not_including_first_buffer = 0;
277 vnet_buffer (b)->sctp.flags = 0;
278 vnet_buffer (b)->sctp.subconn_idx = MAX_SCTP_CONNECTIONS;
279 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b);
280 /* Leave enough space for headers */
281 return vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
285 sctp_alloc_tx_buffers (sctp_main_t * tm, u8 thread_index, u32 n_free_buffers)
287 vlib_main_t *vm = vlib_get_main ();
288 u32 current_length = vec_len (tm->tx_buffers[thread_index]);
291 vec_validate (tm->tx_buffers[thread_index],
292 current_length + n_free_buffers - 1);
294 vlib_buffer_alloc (vm, &tm->tx_buffers[thread_index][current_length],
296 _vec_len (tm->tx_buffers[thread_index]) = current_length + n_allocated;
297 /* buffer shortage, report failure */
298 if (vec_len (tm->tx_buffers[thread_index]) == 0)
300 clib_warning ("out of buffers");
307 sctp_get_free_buffer_index (sctp_main_t * tm, u32 * bidx)
310 u32 thread_index = vlib_get_thread_index ();
311 if (PREDICT_FALSE (vec_len (tm->tx_buffers[thread_index]) == 0))
313 if (sctp_alloc_tx_buffers (tm, thread_index, VLIB_FRAME_SIZE))
316 my_tx_buffers = tm->tx_buffers[thread_index];
317 *bidx = my_tx_buffers[vec_len (my_tx_buffers) - 1];
318 _vec_len (my_tx_buffers) -= 1;
323 sctp_enqueue_to_output_i (vlib_main_t * vm, vlib_buffer_t * b, u32 bi,
326 sctp_main_t *tm = vnet_get_sctp_main ();
327 u32 thread_index = vlib_get_thread_index ();
328 u32 *to_next, next_index;
331 b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
334 /* Decide where to send the packet */
335 next_index = is_ip4 ? sctp4_output_node.index : sctp6_output_node.index;
336 sctp_trajectory_add_start (b, 2);
338 /* Get frame to v4/6 output node */
339 f = tm->tx_frames[!is_ip4][thread_index];
342 f = vlib_get_frame_to_node (vm, next_index);
344 tm->tx_frames[!is_ip4][thread_index] = f;
346 to_next = vlib_frame_vector_args (f);
347 to_next[f->n_vectors] = bi;
349 if (flush || f->n_vectors == VLIB_FRAME_SIZE)
351 vlib_put_frame_to_node (vm, next_index, f);
352 tm->tx_frames[!is_ip4][thread_index] = 0;
357 sctp_enqueue_to_output_now (vlib_main_t * vm, vlib_buffer_t * b, u32 bi,
360 sctp_enqueue_to_output_i (vm, b, bi, is_ip4, 1);
364 sctp_enqueue_to_ip_lookup_i (vlib_main_t * vm, vlib_buffer_t * b, u32 bi,
365 u8 is_ip4, u32 fib_index, u8 flush)
367 sctp_main_t *tm = vnet_get_sctp_main ();
368 u32 thread_index = vlib_get_thread_index ();
369 u32 *to_next, next_index;
372 b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
375 vnet_buffer (b)->sw_if_index[VLIB_TX] = fib_index;
376 vnet_buffer (b)->sw_if_index[VLIB_RX] = 0;
378 /* Send to IP lookup */
379 next_index = is_ip4 ? ip4_lookup_node.index : ip6_lookup_node.index;
380 if (VLIB_BUFFER_TRACE_TRAJECTORY > 0)
383 b->pre_data[1] = next_index;
386 f = tm->ip_lookup_tx_frames[!is_ip4][thread_index];
389 f = vlib_get_frame_to_node (vm, next_index);
391 tm->ip_lookup_tx_frames[!is_ip4][thread_index] = f;
394 to_next = vlib_frame_vector_args (f);
395 to_next[f->n_vectors] = bi;
397 if (flush || f->n_vectors == VLIB_FRAME_SIZE)
399 vlib_put_frame_to_node (vm, next_index, f);
400 tm->ip_lookup_tx_frames[!is_ip4][thread_index] = 0;
405 sctp_enqueue_to_ip_lookup (vlib_main_t * vm, vlib_buffer_t * b, u32 bi,
406 u8 is_ip4, u32 fib_index)
408 sctp_enqueue_to_ip_lookup_i (vm, b, bi, is_ip4, fib_index, 0);
409 if (vm->thread_index == 0 && vlib_num_workers ())
410 session_flush_frames_main_thread (vm);
414 * Convert buffer to INIT
417 sctp_prepare_init_chunk (sctp_connection_t * sctp_conn, u8 idx,
420 u32 random_seed = random_default_seed ();
421 u16 alloc_bytes = sizeof (sctp_init_chunk_t);
422 sctp_sub_connection_t *sub_conn = &sctp_conn->sub_conn[idx];
424 sctp_ipv4_addr_param_t *ip4_param = 0;
425 sctp_ipv6_addr_param_t *ip6_param = 0;
427 if (sub_conn->c_is_ip4)
428 alloc_bytes += sizeof (sctp_ipv4_addr_param_t);
430 alloc_bytes += sizeof (sctp_ipv6_addr_param_t);
432 /* As per RFC 4960 the chunk_length value does NOT contemplate
433 * the size of the first header (see sctp_header_t) and any padding
435 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
437 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
439 sctp_init_chunk_t *init_chunk = vlib_buffer_push_uninit (b, alloc_bytes);
441 u16 pointer_offset = sizeof (init_chunk);
442 if (sub_conn->c_is_ip4)
444 ip4_param = (sctp_ipv4_addr_param_t *) init_chunk + pointer_offset;
445 ip4_param->address.as_u32 = sub_conn->c_lcl_ip.ip4.as_u32;
447 pointer_offset += sizeof (sctp_ipv4_addr_param_t);
451 ip6_param = (sctp_ipv6_addr_param_t *) init_chunk + pointer_offset;
452 ip6_param->address.as_u64[0] = sub_conn->c_lcl_ip.ip6.as_u64[0];
453 ip6_param->address.as_u64[1] = sub_conn->c_lcl_ip.ip6.as_u64[1];
455 pointer_offset += sizeof (sctp_ipv6_addr_param_t);
458 init_chunk->sctp_hdr.src_port = sub_conn->c_lcl_port; /* No need of host_to_net conversion, already in net-byte order */
459 init_chunk->sctp_hdr.dst_port = sub_conn->c_rmt_port; /* No need of host_to_net conversion, already in net-byte order */
460 init_chunk->sctp_hdr.checksum = 0;
461 /* The sender of an INIT must set the VERIFICATION_TAG to 0 as per RFC 4960 Section 8.5.1 */
462 init_chunk->sctp_hdr.verification_tag = 0x0;
464 vnet_sctp_set_chunk_type (&init_chunk->chunk_hdr, INIT);
465 vnet_sctp_set_chunk_length (&init_chunk->chunk_hdr, chunk_len);
466 vnet_sctp_common_hdr_params_host_to_net (&init_chunk->chunk_hdr);
468 sctp_init_cwnd (sctp_conn);
470 init_chunk->a_rwnd = clib_host_to_net_u32 (sctp_conn->sub_conn[idx].cwnd);
471 init_chunk->initiate_tag = clib_host_to_net_u32 (random_u32 (&random_seed));
472 init_chunk->inboud_streams_count =
473 clib_host_to_net_u16 (INBOUND_STREAMS_COUNT);
474 init_chunk->outbound_streams_count =
475 clib_host_to_net_u16 (OUTBOUND_STREAMS_COUNT);
477 init_chunk->initial_tsn =
478 clib_host_to_net_u32 (sctp_conn->local_initial_tsn);
479 SCTP_CONN_TRACKING_DBG ("sctp_conn->local_initial_tsn = %u",
480 sctp_conn->local_initial_tsn);
482 sctp_conn->local_tag = init_chunk->initiate_tag;
484 vnet_buffer (b)->sctp.connection_index = sub_conn->c_c_index;
485 vnet_buffer (b)->sctp.subconn_idx = idx;
487 SCTP_DBG_STATE_MACHINE ("CONN_INDEX = %u, CURR_CONN_STATE = %u (%s), "
489 "SRC_PORT = %u, DST_PORT = %u",
490 sub_conn->connection.c_index,
492 sctp_state_to_string (sctp_conn->state),
493 sctp_chunk_to_string (INIT),
494 init_chunk->sctp_hdr.src_port,
495 init_chunk->sctp_hdr.dst_port);
499 sctp_compute_mac (sctp_connection_t * sctp_conn,
500 sctp_state_cookie_param_t * state_cookie)
502 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
507 unsigned int len = 0;
508 const EVP_MD *md = EVP_sha1 ();
509 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
510 ctx = HMAC_CTX_new ();
511 HMAC_Init_ex (ctx, &state_cookie->creation_time,
512 sizeof (state_cookie->creation_time), md, NULL);
513 HMAC_Update (ctx, (const unsigned char *) &sctp_conn, sizeof (sctp_conn));
514 HMAC_Final (ctx, state_cookie->mac, &len);
516 HMAC_CTX_init (&ctx);
517 HMAC_Init_ex (&ctx, &state_cookie->creation_time,
518 sizeof (state_cookie->creation_time), md, NULL);
519 HMAC_Update (&ctx, (const unsigned char *) &sctp_conn, sizeof (sctp_conn));
520 HMAC_Final (&ctx, state_cookie->mac, &len);
521 HMAC_CTX_cleanup (&ctx);
524 ENDIANESS_SWAP (state_cookie->mac);
528 sctp_prepare_cookie_ack_chunk (sctp_connection_t * sctp_conn, u8 idx,
531 vlib_main_t *vm = vlib_get_main ();
533 sctp_reuse_buffer (vm, b);
535 u16 alloc_bytes = sizeof (sctp_cookie_ack_chunk_t);
537 /* As per RFC 4960 the chunk_length value does NOT contemplate
538 * the size of the first header (see sctp_header_t) and any padding
540 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
542 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
544 sctp_cookie_ack_chunk_t *cookie_ack_chunk =
545 vlib_buffer_push_uninit (b, alloc_bytes);
547 cookie_ack_chunk->sctp_hdr.checksum = 0;
548 cookie_ack_chunk->sctp_hdr.src_port =
549 sctp_conn->sub_conn[idx].connection.lcl_port;
550 cookie_ack_chunk->sctp_hdr.dst_port =
551 sctp_conn->sub_conn[idx].connection.rmt_port;
552 cookie_ack_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag;
553 vnet_sctp_set_chunk_type (&cookie_ack_chunk->chunk_hdr, COOKIE_ACK);
554 vnet_sctp_set_chunk_length (&cookie_ack_chunk->chunk_hdr, chunk_len);
556 vnet_buffer (b)->sctp.connection_index =
557 sctp_conn->sub_conn[idx].connection.c_index;
558 vnet_buffer (b)->sctp.subconn_idx = idx;
562 sctp_prepare_cookie_echo_chunk (sctp_connection_t * sctp_conn, u8 idx,
563 vlib_buffer_t * b, u8 reuse_buffer)
565 vlib_main_t *vm = vlib_get_main ();
568 sctp_reuse_buffer (vm, b);
570 /* The minimum size of the message is given by the sctp_init_ack_chunk_t */
571 u16 alloc_bytes = sizeof (sctp_cookie_echo_chunk_t);
572 /* As per RFC 4960 the chunk_length value does NOT contemplate
573 * the size of the first header (see sctp_header_t) and any padding
575 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
576 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
577 sctp_cookie_echo_chunk_t *cookie_echo_chunk =
578 vlib_buffer_push_uninit (b, alloc_bytes);
579 cookie_echo_chunk->sctp_hdr.checksum = 0;
580 cookie_echo_chunk->sctp_hdr.src_port =
581 sctp_conn->sub_conn[idx].connection.lcl_port;
582 cookie_echo_chunk->sctp_hdr.dst_port =
583 sctp_conn->sub_conn[idx].connection.rmt_port;
584 cookie_echo_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag;
585 vnet_sctp_set_chunk_type (&cookie_echo_chunk->chunk_hdr, COOKIE_ECHO);
586 vnet_sctp_set_chunk_length (&cookie_echo_chunk->chunk_hdr, chunk_len);
587 clib_memcpy (&(cookie_echo_chunk->cookie), &sctp_conn->cookie_param,
588 sizeof (sctp_state_cookie_param_t));
590 vnet_buffer (b)->sctp.connection_index =
591 sctp_conn->sub_conn[idx].connection.c_index;
592 vnet_buffer (b)->sctp.subconn_idx = idx;
600 sctp_send_cookie_echo (sctp_connection_t * sctp_conn)
604 sctp_main_t *tm = vnet_get_sctp_main ();
605 vlib_main_t *vm = vlib_get_main ();
607 if (PREDICT_FALSE (sctp_conn->init_retransmit_err > SCTP_MAX_INIT_RETRANS))
609 clib_warning ("Reached MAX_INIT_RETRANS times. Aborting connection.");
611 session_stream_connect_notify (&sctp_conn->sub_conn
612 [SCTP_PRIMARY_PATH_IDX].connection, 1);
614 sctp_connection_timers_reset (sctp_conn);
616 sctp_connection_cleanup (sctp_conn);
619 if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi)))
622 b = vlib_get_buffer (vm, bi);
623 u8 idx = SCTP_PRIMARY_PATH_IDX;
625 sctp_init_buffer (vm, b);
626 sctp_prepare_cookie_echo_chunk (sctp_conn, idx, b, 0);
627 sctp_enqueue_to_output_now (vm, b, bi, sctp_conn->sub_conn[idx].c_is_ip4);
629 /* Start the T1_INIT timer */
630 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T1_INIT,
631 sctp_conn->sub_conn[idx].RTO);
633 /* Change state to COOKIE_WAIT */
634 sctp_conn->state = SCTP_STATE_COOKIE_WAIT;
636 /* Measure RTT with this */
637 sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
642 * Convert buffer to ERROR
645 sctp_prepare_operation_error (sctp_connection_t * sctp_conn, u8 idx,
646 vlib_buffer_t * b, u8 err_cause)
648 vlib_main_t *vm = vlib_get_main ();
650 sctp_reuse_buffer (vm, b);
652 /* The minimum size of the message is given by the sctp_operation_error_t */
654 sizeof (sctp_operation_error_t) + sizeof (sctp_err_cause_param_t);
656 /* As per RFC 4960 the chunk_length value does NOT contemplate
657 * the size of the first header (see sctp_header_t) and any padding
659 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
661 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
663 sctp_operation_error_t *err_chunk =
664 vlib_buffer_push_uninit (b, alloc_bytes);
666 /* src_port & dst_port are already in network byte-order */
667 err_chunk->sctp_hdr.checksum = 0;
668 err_chunk->sctp_hdr.src_port = sctp_conn->sub_conn[idx].connection.lcl_port;
669 err_chunk->sctp_hdr.dst_port = sctp_conn->sub_conn[idx].connection.rmt_port;
670 /* As per RFC4960 Section 5.2.2: copy the INITIATE_TAG into the VERIFICATION_TAG of the ABORT chunk */
671 err_chunk->sctp_hdr.verification_tag = sctp_conn->local_tag;
673 err_chunk->err_causes[0].param_hdr.length =
674 clib_host_to_net_u16 (sizeof (err_chunk->err_causes[0].param_hdr.type) +
675 sizeof (err_chunk->err_causes[0].param_hdr.length));
676 err_chunk->err_causes[0].param_hdr.type = clib_host_to_net_u16 (err_cause);
678 vnet_sctp_set_chunk_type (&err_chunk->chunk_hdr, OPERATION_ERROR);
679 vnet_sctp_set_chunk_length (&err_chunk->chunk_hdr, chunk_len);
681 vnet_buffer (b)->sctp.connection_index =
682 sctp_conn->sub_conn[idx].connection.c_index;
683 vnet_buffer (b)->sctp.subconn_idx = idx;
687 * Convert buffer to ABORT
690 sctp_prepare_abort_for_collision (sctp_connection_t * sctp_conn, u8 idx,
691 vlib_buffer_t * b, ip4_address_t * ip4_addr,
692 ip6_address_t * ip6_addr)
694 vlib_main_t *vm = vlib_get_main ();
696 sctp_reuse_buffer (vm, b);
698 /* The minimum size of the message is given by the sctp_abort_chunk_t */
699 u16 alloc_bytes = sizeof (sctp_abort_chunk_t);
701 /* As per RFC 4960 the chunk_length value does NOT contemplate
702 * the size of the first header (see sctp_header_t) and any padding
704 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
706 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
708 sctp_abort_chunk_t *abort_chunk = vlib_buffer_push_uninit (b, alloc_bytes);
710 /* src_port & dst_port are already in network byte-order */
711 abort_chunk->sctp_hdr.checksum = 0;
712 abort_chunk->sctp_hdr.src_port =
713 sctp_conn->sub_conn[idx].connection.lcl_port;
714 abort_chunk->sctp_hdr.dst_port =
715 sctp_conn->sub_conn[idx].connection.rmt_port;
716 /* As per RFC4960 Section 5.2.2: copy the INITIATE_TAG into the VERIFICATION_TAG of the ABORT chunk */
717 abort_chunk->sctp_hdr.verification_tag = sctp_conn->local_tag;
719 vnet_sctp_set_chunk_type (&abort_chunk->chunk_hdr, ABORT);
720 vnet_sctp_set_chunk_length (&abort_chunk->chunk_hdr, chunk_len);
722 vnet_buffer (b)->sctp.connection_index =
723 sctp_conn->sub_conn[idx].connection.c_index;
724 vnet_buffer (b)->sctp.subconn_idx = idx;
728 * Convert buffer to INIT-ACK
731 sctp_prepare_initack_chunk_for_collision (sctp_connection_t * sctp_conn,
732 u8 idx, vlib_buffer_t * b,
733 ip4_address_t * ip4_addr,
734 ip6_address_t * ip6_addr)
736 vlib_main_t *vm = vlib_get_main ();
737 sctp_ipv4_addr_param_t *ip4_param = 0;
738 sctp_ipv6_addr_param_t *ip6_param = 0;
740 sctp_reuse_buffer (vm, b);
742 /* The minimum size of the message is given by the sctp_init_ack_chunk_t */
744 sizeof (sctp_init_ack_chunk_t) + sizeof (sctp_state_cookie_param_t);
746 if (PREDICT_TRUE (ip4_addr != NULL))
748 /* Create room for variable-length fields in the INIT_ACK chunk */
749 alloc_bytes += SCTP_IPV4_ADDRESS_TYPE_LENGTH;
751 if (PREDICT_TRUE (ip6_addr != NULL))
753 /* Create room for variable-length fields in the INIT_ACK chunk */
754 alloc_bytes += SCTP_IPV6_ADDRESS_TYPE_LENGTH;
757 if (sctp_conn->sub_conn[idx].connection.is_ip4)
758 alloc_bytes += sizeof (sctp_ipv4_addr_param_t);
760 alloc_bytes += sizeof (sctp_ipv6_addr_param_t);
762 /* As per RFC 4960 the chunk_length value does NOT contemplate
763 * the size of the first header (see sctp_header_t) and any padding
765 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
767 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
769 sctp_init_ack_chunk_t *init_ack_chunk =
770 vlib_buffer_push_uninit (b, alloc_bytes);
772 u16 pointer_offset = sizeof (sctp_init_ack_chunk_t);
774 /* Create State Cookie parameter */
775 sctp_state_cookie_param_t *state_cookie_param =
776 (sctp_state_cookie_param_t *) ((char *) init_ack_chunk + pointer_offset);
778 state_cookie_param->param_hdr.type =
779 clib_host_to_net_u16 (SCTP_STATE_COOKIE_TYPE);
780 state_cookie_param->param_hdr.length =
781 clib_host_to_net_u16 (sizeof (sctp_state_cookie_param_t));
782 state_cookie_param->creation_time = clib_host_to_net_u32 (sctp_time_now ());
783 state_cookie_param->cookie_lifespan =
784 clib_host_to_net_u32 (SCTP_VALID_COOKIE_LIFE);
786 sctp_compute_mac (sctp_conn, state_cookie_param);
788 pointer_offset += sizeof (sctp_state_cookie_param_t);
790 if (PREDICT_TRUE (ip4_addr != NULL))
792 sctp_ipv4_addr_param_t *ipv4_addr =
793 (sctp_ipv4_addr_param_t *) init_ack_chunk + pointer_offset;
795 ipv4_addr->param_hdr.type =
796 clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE);
797 ipv4_addr->param_hdr.length =
798 clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE_LENGTH);
799 ipv4_addr->address.as_u32 = ip4_addr->as_u32;
801 pointer_offset += SCTP_IPV4_ADDRESS_TYPE_LENGTH;
803 if (PREDICT_TRUE (ip6_addr != NULL))
805 sctp_ipv6_addr_param_t *ipv6_addr =
806 (sctp_ipv6_addr_param_t *) init_ack_chunk + pointer_offset;
808 ipv6_addr->param_hdr.type =
809 clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE);
810 ipv6_addr->param_hdr.length =
811 clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE_LENGTH);
812 ipv6_addr->address.as_u64[0] = ip6_addr->as_u64[0];
813 ipv6_addr->address.as_u64[1] = ip6_addr->as_u64[1];
815 pointer_offset += SCTP_IPV6_ADDRESS_TYPE_LENGTH;
818 if (sctp_conn->sub_conn[idx].connection.is_ip4)
820 ip4_param = (sctp_ipv4_addr_param_t *) init_ack_chunk + pointer_offset;
821 ip4_param->address.as_u32 =
822 sctp_conn->sub_conn[idx].connection.lcl_ip.ip4.as_u32;
824 pointer_offset += sizeof (sctp_ipv4_addr_param_t);
828 ip6_param = (sctp_ipv6_addr_param_t *) init_ack_chunk + pointer_offset;
829 ip6_param->address.as_u64[0] =
830 sctp_conn->sub_conn[idx].connection.lcl_ip.ip6.as_u64[0];
831 ip6_param->address.as_u64[1] =
832 sctp_conn->sub_conn[idx].connection.lcl_ip.ip6.as_u64[1];
834 pointer_offset += sizeof (sctp_ipv6_addr_param_t);
837 /* src_port & dst_port are already in network byte-order */
838 init_ack_chunk->sctp_hdr.checksum = 0;
839 init_ack_chunk->sctp_hdr.src_port =
840 sctp_conn->sub_conn[idx].connection.lcl_port;
841 init_ack_chunk->sctp_hdr.dst_port =
842 sctp_conn->sub_conn[idx].connection.rmt_port;
843 /* the sctp_conn->verification_tag is already in network byte-order (being a copy of the init_tag coming with the INIT chunk) */
844 init_ack_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag;
845 init_ack_chunk->initial_tsn =
846 clib_host_to_net_u32 (sctp_conn->local_initial_tsn);
847 SCTP_CONN_TRACKING_DBG ("init_ack_chunk->initial_tsn = %u",
848 init_ack_chunk->initial_tsn);
850 vnet_sctp_set_chunk_type (&init_ack_chunk->chunk_hdr, INIT_ACK);
851 vnet_sctp_set_chunk_length (&init_ack_chunk->chunk_hdr, chunk_len);
853 init_ack_chunk->initiate_tag = sctp_conn->local_tag;
855 init_ack_chunk->a_rwnd =
856 clib_host_to_net_u32 (sctp_conn->sub_conn[idx].cwnd);
857 init_ack_chunk->inboud_streams_count =
858 clib_host_to_net_u16 (INBOUND_STREAMS_COUNT);
859 init_ack_chunk->outbound_streams_count =
860 clib_host_to_net_u16 (OUTBOUND_STREAMS_COUNT);
862 vnet_buffer (b)->sctp.connection_index =
863 sctp_conn->sub_conn[idx].connection.c_index;
864 vnet_buffer (b)->sctp.subconn_idx = idx;
868 * Convert buffer to INIT-ACK
871 sctp_prepare_initack_chunk (sctp_connection_t * sctp_conn, u8 idx,
872 vlib_buffer_t * b, ip4_address_t * ip4_addr,
873 u8 add_ip4, ip6_address_t * ip6_addr, u8 add_ip6)
875 vlib_main_t *vm = vlib_get_main ();
876 sctp_ipv4_addr_param_t *ip4_param = 0;
877 sctp_ipv6_addr_param_t *ip6_param = 0;
878 u32 random_seed = random_default_seed ();
880 sctp_reuse_buffer (vm, b);
882 /* The minimum size of the message is given by the sctp_init_ack_chunk_t */
884 sizeof (sctp_init_ack_chunk_t) + sizeof (sctp_state_cookie_param_t);
886 if (PREDICT_FALSE (add_ip4 == 1))
888 /* Create room for variable-length fields in the INIT_ACK chunk */
889 alloc_bytes += SCTP_IPV4_ADDRESS_TYPE_LENGTH;
891 if (PREDICT_FALSE (add_ip6 == 1))
893 /* Create room for variable-length fields in the INIT_ACK chunk */
894 alloc_bytes += SCTP_IPV6_ADDRESS_TYPE_LENGTH;
897 if (sctp_conn->sub_conn[idx].connection.is_ip4)
898 alloc_bytes += sizeof (sctp_ipv4_addr_param_t);
900 alloc_bytes += sizeof (sctp_ipv6_addr_param_t);
902 /* As per RFC 4960 the chunk_length value does NOT contemplate
903 * the size of the first header (see sctp_header_t) and any padding
905 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
907 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
909 sctp_init_ack_chunk_t *init_ack_chunk =
910 vlib_buffer_push_uninit (b, alloc_bytes);
912 u16 pointer_offset = sizeof (sctp_init_ack_chunk_t);
914 /* Create State Cookie parameter */
915 sctp_state_cookie_param_t *state_cookie_param =
916 (sctp_state_cookie_param_t *) ((char *) init_ack_chunk + pointer_offset);
918 state_cookie_param->param_hdr.type =
919 clib_host_to_net_u16 (SCTP_STATE_COOKIE_TYPE);
920 state_cookie_param->param_hdr.length =
921 clib_host_to_net_u16 (sizeof (sctp_state_cookie_param_t));
922 state_cookie_param->creation_time = clib_host_to_net_u32 (sctp_time_now ());
923 state_cookie_param->cookie_lifespan =
924 clib_host_to_net_u32 (SCTP_VALID_COOKIE_LIFE);
926 sctp_compute_mac (sctp_conn, state_cookie_param);
928 pointer_offset += sizeof (sctp_state_cookie_param_t);
930 if (PREDICT_TRUE (ip4_addr != NULL))
932 sctp_ipv4_addr_param_t *ipv4_addr =
933 (sctp_ipv4_addr_param_t *) init_ack_chunk + pointer_offset;
935 ipv4_addr->param_hdr.type =
936 clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE);
937 ipv4_addr->param_hdr.length =
938 clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE_LENGTH);
939 ipv4_addr->address.as_u32 = ip4_addr->as_u32;
941 pointer_offset += SCTP_IPV4_ADDRESS_TYPE_LENGTH;
943 if (PREDICT_TRUE (ip6_addr != NULL))
945 sctp_ipv6_addr_param_t *ipv6_addr =
946 (sctp_ipv6_addr_param_t *) init_ack_chunk + pointer_offset;
948 ipv6_addr->param_hdr.type =
949 clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE);
950 ipv6_addr->param_hdr.length =
951 clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE_LENGTH);
952 ipv6_addr->address.as_u64[0] = ip6_addr->as_u64[0];
953 ipv6_addr->address.as_u64[1] = ip6_addr->as_u64[1];
955 pointer_offset += SCTP_IPV6_ADDRESS_TYPE_LENGTH;
958 if (sctp_conn->sub_conn[idx].connection.is_ip4)
960 ip4_param = (sctp_ipv4_addr_param_t *) init_ack_chunk + pointer_offset;
961 ip4_param->address.as_u32 =
962 sctp_conn->sub_conn[idx].connection.lcl_ip.ip4.as_u32;
964 pointer_offset += sizeof (sctp_ipv4_addr_param_t);
968 ip6_param = (sctp_ipv6_addr_param_t *) init_ack_chunk + pointer_offset;
969 ip6_param->address.as_u64[0] =
970 sctp_conn->sub_conn[idx].connection.lcl_ip.ip6.as_u64[0];
971 ip6_param->address.as_u64[1] =
972 sctp_conn->sub_conn[idx].connection.lcl_ip.ip6.as_u64[1];
974 pointer_offset += sizeof (sctp_ipv6_addr_param_t);
977 /* src_port & dst_port are already in network byte-order */
978 init_ack_chunk->sctp_hdr.checksum = 0;
979 init_ack_chunk->sctp_hdr.src_port =
980 sctp_conn->sub_conn[idx].connection.lcl_port;
981 init_ack_chunk->sctp_hdr.dst_port =
982 sctp_conn->sub_conn[idx].connection.rmt_port;
983 /* the sctp_conn->verification_tag is already in network byte-order (being a copy of the init_tag coming with the INIT chunk) */
984 init_ack_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag;
985 init_ack_chunk->initial_tsn =
986 clib_host_to_net_u32 (sctp_conn->local_initial_tsn);
987 SCTP_CONN_TRACKING_DBG ("init_ack_chunk->initial_tsn = %u",
988 init_ack_chunk->initial_tsn);
990 vnet_sctp_set_chunk_type (&init_ack_chunk->chunk_hdr, INIT_ACK);
991 vnet_sctp_set_chunk_length (&init_ack_chunk->chunk_hdr, chunk_len);
993 init_ack_chunk->initiate_tag =
994 clib_host_to_net_u32 (random_u32 (&random_seed));
996 init_ack_chunk->a_rwnd =
997 clib_host_to_net_u32 (sctp_conn->sub_conn[idx].cwnd);
998 init_ack_chunk->inboud_streams_count =
999 clib_host_to_net_u16 (INBOUND_STREAMS_COUNT);
1000 init_ack_chunk->outbound_streams_count =
1001 clib_host_to_net_u16 (OUTBOUND_STREAMS_COUNT);
1003 sctp_conn->local_tag = init_ack_chunk->initiate_tag;
1005 vnet_buffer (b)->sctp.connection_index =
1006 sctp_conn->sub_conn[idx].connection.c_index;
1007 vnet_buffer (b)->sctp.subconn_idx = idx;
1011 * Convert buffer to SHUTDOWN
1014 sctp_prepare_shutdown_chunk (sctp_connection_t * sctp_conn, u8 idx,
1017 u16 alloc_bytes = sizeof (sctp_shutdown_association_chunk_t);
1019 /* As per RFC 4960 the chunk_length value does NOT contemplate
1020 * the size of the first header (see sctp_header_t) and any padding
1022 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
1024 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
1026 sctp_shutdown_association_chunk_t *shutdown_chunk =
1027 vlib_buffer_push_uninit (b, alloc_bytes);
1029 shutdown_chunk->sctp_hdr.checksum = 0;
1030 /* No need of host_to_net conversion, already in net-byte order */
1031 shutdown_chunk->sctp_hdr.src_port =
1032 sctp_conn->sub_conn[idx].connection.lcl_port;
1033 shutdown_chunk->sctp_hdr.dst_port =
1034 sctp_conn->sub_conn[idx].connection.rmt_port;
1035 shutdown_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag;
1036 vnet_sctp_set_chunk_type (&shutdown_chunk->chunk_hdr, SHUTDOWN);
1037 vnet_sctp_set_chunk_length (&shutdown_chunk->chunk_hdr, chunk_len);
1039 shutdown_chunk->cumulative_tsn_ack = sctp_conn->last_rcvd_tsn;
1041 vnet_buffer (b)->sctp.connection_index =
1042 sctp_conn->sub_conn[idx].connection.c_index;
1043 vnet_buffer (b)->sctp.subconn_idx = idx;
1050 sctp_send_shutdown (sctp_connection_t * sctp_conn)
1054 sctp_main_t *tm = vnet_get_sctp_main ();
1055 vlib_main_t *vm = vlib_get_main ();
1057 if (sctp_check_outstanding_data_chunks (sctp_conn) > 0)
1060 if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi)))
1063 u8 idx = SCTP_PRIMARY_PATH_IDX;
1065 b = vlib_get_buffer (vm, bi);
1066 sctp_init_buffer (vm, b);
1067 sctp_prepare_shutdown_chunk (sctp_conn, idx, b);
1069 sctp_enqueue_to_output_now (vm, b, bi,
1070 sctp_conn->sub_conn[idx].connection.is_ip4);
1074 * Convert buffer to SHUTDOWN_ACK
1077 sctp_prepare_shutdown_ack_chunk (sctp_connection_t * sctp_conn, u8 idx,
1080 u16 alloc_bytes = sizeof (sctp_shutdown_association_chunk_t);
1081 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
1083 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
1085 sctp_shutdown_ack_chunk_t *shutdown_ack_chunk =
1086 vlib_buffer_push_uninit (b, alloc_bytes);
1088 shutdown_ack_chunk->sctp_hdr.checksum = 0;
1089 /* No need of host_to_net conversion, already in net-byte order */
1090 shutdown_ack_chunk->sctp_hdr.src_port =
1091 sctp_conn->sub_conn[idx].connection.lcl_port;
1092 shutdown_ack_chunk->sctp_hdr.dst_port =
1093 sctp_conn->sub_conn[idx].connection.rmt_port;
1094 shutdown_ack_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag;
1096 vnet_sctp_set_chunk_type (&shutdown_ack_chunk->chunk_hdr, SHUTDOWN_ACK);
1097 vnet_sctp_set_chunk_length (&shutdown_ack_chunk->chunk_hdr, chunk_len);
1099 vnet_buffer (b)->sctp.connection_index =
1100 sctp_conn->sub_conn[idx].connection.c_index;
1101 vnet_buffer (b)->sctp.subconn_idx = idx;
1108 sctp_send_shutdown_ack (sctp_connection_t * sctp_conn, u8 idx,
1111 vlib_main_t *vm = vlib_get_main ();
1113 if (sctp_check_outstanding_data_chunks (sctp_conn) > 0)
1116 sctp_reuse_buffer (vm, b);
1118 sctp_prepare_shutdown_ack_chunk (sctp_conn, idx, b);
1122 * Convert buffer to SACK
1125 sctp_prepare_sack_chunk (sctp_connection_t * sctp_conn, u8 idx,
1128 vlib_main_t *vm = vlib_get_main ();
1130 sctp_reuse_buffer (vm, b);
1132 u16 alloc_bytes = sizeof (sctp_selective_ack_chunk_t);
1134 /* As per RFC 4960 the chunk_length value does NOT contemplate
1135 * the size of the first header (see sctp_header_t) and any padding
1137 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
1139 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
1141 sctp_selective_ack_chunk_t *sack = vlib_buffer_push_uninit (b, alloc_bytes);
1143 sack->sctp_hdr.checksum = 0;
1144 sack->sctp_hdr.src_port = sctp_conn->sub_conn[idx].connection.lcl_port;
1145 sack->sctp_hdr.dst_port = sctp_conn->sub_conn[idx].connection.rmt_port;
1146 sack->sctp_hdr.verification_tag = sctp_conn->remote_tag;
1147 vnet_sctp_set_chunk_type (&sack->chunk_hdr, SACK);
1148 vnet_sctp_set_chunk_length (&sack->chunk_hdr, chunk_len);
1150 sack->cumulative_tsn_ack = sctp_conn->next_tsn_expected;
1152 sctp_conn->ack_state = 0;
1154 vnet_buffer (b)->sctp.connection_index =
1155 sctp_conn->sub_conn[idx].connection.c_index;
1156 vnet_buffer (b)->sctp.subconn_idx = idx;
1160 * Convert buffer to HEARTBEAT_ACK
1163 sctp_prepare_heartbeat_ack_chunk (sctp_connection_t * sctp_conn, u8 idx,
1166 vlib_main_t *vm = vlib_get_main ();
1168 u16 alloc_bytes = sizeof (sctp_hb_ack_chunk_t);
1170 sctp_reuse_buffer (vm, b);
1172 /* As per RFC 4960 the chunk_length value does NOT contemplate
1173 * the size of the first header (see sctp_header_t) and any padding
1175 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
1177 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
1179 sctp_hb_ack_chunk_t *hb_ack = vlib_buffer_push_uninit (b, alloc_bytes);
1181 hb_ack->sctp_hdr.checksum = 0;
1182 /* No need of host_to_net conversion, already in net-byte order */
1183 hb_ack->sctp_hdr.src_port = sctp_conn->sub_conn[idx].connection.lcl_port;
1184 hb_ack->sctp_hdr.dst_port = sctp_conn->sub_conn[idx].connection.rmt_port;
1185 hb_ack->sctp_hdr.verification_tag = sctp_conn->remote_tag;
1186 hb_ack->hb_info.param_hdr.type = clib_host_to_net_u16 (1);
1187 hb_ack->hb_info.param_hdr.length =
1188 clib_host_to_net_u16 (sizeof (hb_ack->hb_info.hb_info));
1190 vnet_sctp_set_chunk_type (&hb_ack->chunk_hdr, HEARTBEAT_ACK);
1191 vnet_sctp_set_chunk_length (&hb_ack->chunk_hdr, chunk_len);
1193 vnet_buffer (b)->sctp.connection_index =
1194 sctp_conn->sub_conn[idx].connection.c_index;
1195 vnet_buffer (b)->sctp.subconn_idx = idx;
1199 * Convert buffer to HEARTBEAT
1202 sctp_prepare_heartbeat_chunk (sctp_connection_t * sctp_conn, u8 idx,
1205 u16 alloc_bytes = sizeof (sctp_hb_req_chunk_t);
1207 /* As per RFC 4960 the chunk_length value does NOT contemplate
1208 * the size of the first header (see sctp_header_t) and any padding
1210 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
1212 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
1214 sctp_hb_req_chunk_t *hb_req = vlib_buffer_push_uninit (b, alloc_bytes);
1216 hb_req->sctp_hdr.checksum = 0;
1217 /* No need of host_to_net conversion, already in net-byte order */
1218 hb_req->sctp_hdr.src_port = sctp_conn->sub_conn[idx].connection.lcl_port;
1219 hb_req->sctp_hdr.dst_port = sctp_conn->sub_conn[idx].connection.rmt_port;
1220 hb_req->sctp_hdr.verification_tag = sctp_conn->remote_tag;
1221 hb_req->hb_info.param_hdr.type = clib_host_to_net_u16 (1);
1222 hb_req->hb_info.param_hdr.length =
1223 clib_host_to_net_u16 (sizeof (hb_req->hb_info.hb_info));
1225 vnet_sctp_set_chunk_type (&hb_req->chunk_hdr, HEARTBEAT);
1226 vnet_sctp_set_chunk_length (&hb_req->chunk_hdr, chunk_len);
1228 vnet_buffer (b)->sctp.connection_index =
1229 sctp_conn->sub_conn[idx].connection.c_index;
1230 vnet_buffer (b)->sctp.subconn_idx = idx;
1234 sctp_send_heartbeat (sctp_connection_t * sctp_conn)
1238 sctp_main_t *tm = vnet_get_sctp_main ();
1239 vlib_main_t *vm = vlib_get_main ();
1242 u32 now = sctp_time_now ();
1244 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
1246 if (sctp_conn->sub_conn[i].state == SCTP_SUBCONN_STATE_DOWN)
1249 if (now > (sctp_conn->sub_conn[i].last_seen + SCTP_HB_INTERVAL))
1251 if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi)))
1254 b = vlib_get_buffer (vm, bi);
1255 sctp_init_buffer (vm, b);
1256 sctp_prepare_heartbeat_chunk (sctp_conn, i, b);
1258 sctp_enqueue_to_output_now (vm, b, bi,
1259 sctp_conn->sub_conn[i].
1262 sctp_conn->sub_conn[i].unacknowledged_hb += 1;
1268 * Convert buffer to SHUTDOWN_COMPLETE
1271 sctp_prepare_shutdown_complete_chunk (sctp_connection_t * sctp_conn, u8 idx,
1274 u16 alloc_bytes = sizeof (sctp_shutdown_association_chunk_t);
1275 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
1277 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
1279 sctp_shutdown_complete_chunk_t *shutdown_complete =
1280 vlib_buffer_push_uninit (b, alloc_bytes);
1282 shutdown_complete->sctp_hdr.checksum = 0;
1283 /* No need of host_to_net conversion, already in net-byte order */
1284 shutdown_complete->sctp_hdr.src_port =
1285 sctp_conn->sub_conn[idx].connection.lcl_port;
1286 shutdown_complete->sctp_hdr.dst_port =
1287 sctp_conn->sub_conn[idx].connection.rmt_port;
1288 shutdown_complete->sctp_hdr.verification_tag = sctp_conn->remote_tag;
1290 vnet_sctp_set_chunk_type (&shutdown_complete->chunk_hdr, SHUTDOWN_COMPLETE);
1291 vnet_sctp_set_chunk_length (&shutdown_complete->chunk_hdr, chunk_len);
1293 vnet_buffer (b)->sctp.connection_index =
1294 sctp_conn->sub_conn[idx].connection.c_index;
1295 vnet_buffer (b)->sctp.subconn_idx = idx;
1299 sctp_send_shutdown_complete (sctp_connection_t * sctp_conn, u8 idx,
1302 vlib_main_t *vm = vlib_get_main ();
1304 if (sctp_check_outstanding_data_chunks (sctp_conn) > 0)
1307 sctp_reuse_buffer (vm, b0);
1309 sctp_prepare_shutdown_complete_chunk (sctp_conn, idx, b0);
1316 sctp_send_init (sctp_connection_t * sctp_conn)
1320 sctp_main_t *tm = vnet_get_sctp_main ();
1321 vlib_main_t *vm = vlib_get_main ();
1323 if (PREDICT_FALSE (sctp_conn->init_retransmit_err > SCTP_MAX_INIT_RETRANS))
1325 clib_warning ("Reached MAX_INIT_RETRANS times. Aborting connection.");
1327 session_stream_connect_notify (&sctp_conn->sub_conn
1328 [SCTP_PRIMARY_PATH_IDX].connection, 1);
1330 sctp_connection_timers_reset (sctp_conn);
1332 sctp_connection_cleanup (sctp_conn);
1337 if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi)))
1340 b = vlib_get_buffer (vm, bi);
1341 u8 idx = SCTP_PRIMARY_PATH_IDX;
1343 sctp_init_buffer (vm, b);
1344 sctp_prepare_init_chunk (sctp_conn, idx, b);
1346 sctp_push_ip_hdr (tm, &sctp_conn->sub_conn[idx], b);
1347 sctp_enqueue_to_ip_lookup (vm, b, bi, sctp_conn->sub_conn[idx].c_is_ip4,
1348 sctp_conn->sub_conn[idx].c_fib_index);
1350 /* Start the T1_INIT timer */
1351 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T1_INIT,
1352 sctp_conn->sub_conn[idx].RTO);
1354 /* Change state to COOKIE_WAIT */
1355 sctp_conn->state = SCTP_STATE_COOKIE_WAIT;
1357 /* Measure RTT with this */
1358 sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
1362 * Push SCTP header and update connection variables
1365 sctp_push_hdr_i (sctp_connection_t * sctp_conn, vlib_buffer_t * b,
1366 sctp_state_t next_state)
1369 b->current_length + b->total_length_not_including_first_buffer;
1370 ASSERT (!b->total_length_not_including_first_buffer
1371 || (b->flags & VLIB_BUFFER_NEXT_PRESENT));
1373 SCTP_ADV_DBG_OUTPUT ("b->current_length = %u, "
1374 "b->current_data = %p "
1376 b->current_length, b->current_data, data_len);
1378 u16 bytes_to_add = sizeof (sctp_payload_data_chunk_t);
1379 u16 chunk_length = data_len + bytes_to_add - sizeof (sctp_header_t);
1381 bytes_to_add += vnet_sctp_calculate_padding (bytes_to_add + data_len);
1383 sctp_payload_data_chunk_t *data_chunk =
1384 vlib_buffer_push_uninit (b, bytes_to_add);
1386 u8 idx = sctp_data_subconn_select (sctp_conn);
1388 ("SCTP_CONN = %p, IDX = %u, S_INDEX = %u, C_INDEX = %u, sctp_conn->[...].LCL_PORT = %u, sctp_conn->[...].RMT_PORT = %u",
1389 sctp_conn, idx, sctp_conn->sub_conn[idx].connection.s_index,
1390 sctp_conn->sub_conn[idx].connection.c_index,
1391 sctp_conn->sub_conn[idx].connection.lcl_port,
1392 sctp_conn->sub_conn[idx].connection.rmt_port);
1393 data_chunk->sctp_hdr.checksum = 0;
1394 data_chunk->sctp_hdr.src_port =
1395 sctp_conn->sub_conn[idx].connection.lcl_port;
1396 data_chunk->sctp_hdr.dst_port =
1397 sctp_conn->sub_conn[idx].connection.rmt_port;
1398 data_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag;
1400 data_chunk->tsn = clib_host_to_net_u32 (sctp_conn->next_tsn);
1401 data_chunk->stream_id = clib_host_to_net_u16 (0);
1402 data_chunk->stream_seq = clib_host_to_net_u16 (0);
1404 vnet_sctp_set_chunk_type (&data_chunk->chunk_hdr, DATA);
1405 vnet_sctp_set_chunk_length (&data_chunk->chunk_hdr, chunk_length);
1407 vnet_sctp_set_bbit (&data_chunk->chunk_hdr);
1408 vnet_sctp_set_ebit (&data_chunk->chunk_hdr);
1410 SCTP_ADV_DBG_OUTPUT ("POINTER_WITH_DATA = %p, DATA_OFFSET = %u",
1411 b->data, b->current_data);
1413 if (sctp_conn->sub_conn[idx].state != SCTP_SUBCONN_AWAITING_SACK)
1415 sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_AWAITING_SACK;
1416 sctp_conn->last_unacked_tsn = sctp_conn->next_tsn;
1419 sctp_conn->next_tsn += data_len;
1421 u32 inflight = sctp_conn->next_tsn - sctp_conn->last_unacked_tsn;
1422 /* Section 7.2.2; point (3) */
1423 if (sctp_conn->sub_conn[idx].partially_acked_bytes >=
1424 sctp_conn->sub_conn[idx].cwnd
1425 && inflight >= sctp_conn->sub_conn[idx].cwnd)
1427 sctp_conn->sub_conn[idx].cwnd += sctp_conn->sub_conn[idx].PMTU;
1428 sctp_conn->sub_conn[idx].partially_acked_bytes -=
1429 sctp_conn->sub_conn[idx].cwnd;
1432 sctp_conn->sub_conn[idx].last_data_ts = sctp_time_now ();
1434 vnet_buffer (b)->sctp.connection_index =
1435 sctp_conn->sub_conn[idx].connection.c_index;
1437 vnet_buffer (b)->sctp.subconn_idx = idx;
1441 sctp_push_header (transport_connection_t * trans_conn, vlib_buffer_t * b)
1443 sctp_connection_t *sctp_conn =
1444 sctp_get_connection_from_transport (trans_conn);
1446 SCTP_DBG_OUTPUT ("TRANS_CONN = %p, SCTP_CONN = %p, "
1447 "S_INDEX = %u, C_INDEX = %u,"
1448 "trans_conn->LCL_PORT = %u, trans_conn->RMT_PORT = %u",
1451 trans_conn->s_index,
1452 trans_conn->c_index,
1453 trans_conn->lcl_port, trans_conn->rmt_port);
1455 sctp_push_hdr_i (sctp_conn, b, SCTP_STATE_ESTABLISHED);
1457 sctp_trajectory_add_start (b, 3);
1463 sctp_prepare_data_retransmit (sctp_connection_t * sctp_conn,
1466 u32 max_deq_bytes, vlib_buffer_t ** b)
1468 sctp_main_t *tm = vnet_get_sctp_main ();
1469 vlib_main_t *vm = vlib_get_main ();
1471 u32 bi, available_bytes, seg_size;
1474 ASSERT (sctp_conn->state >= SCTP_STATE_ESTABLISHED);
1475 ASSERT (max_deq_bytes != 0);
1478 * Make sure we can retransmit something
1481 session_tx_fifo_max_dequeue (&sctp_conn->sub_conn[idx].connection);
1482 ASSERT (available_bytes >= offset);
1483 available_bytes -= offset;
1484 if (!available_bytes)
1486 max_deq_bytes = clib_min (sctp_conn->sub_conn[idx].cwnd, max_deq_bytes);
1487 max_deq_bytes = clib_min (available_bytes, max_deq_bytes);
1489 seg_size = max_deq_bytes;
1492 * Allocate and fill in buffer(s)
1495 if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi)))
1497 *b = vlib_get_buffer (vm, bi);
1498 data = sctp_init_buffer (vm, *b);
1500 /* Easy case, buffer size greater than mss */
1501 if (PREDICT_TRUE (seg_size <= tm->bytes_per_buffer))
1504 stream_session_peek_bytes (&sctp_conn->sub_conn[idx].connection, data,
1505 offset, max_deq_bytes);
1506 ASSERT (n_bytes == max_deq_bytes);
1507 b[0]->current_length = n_bytes;
1508 sctp_push_hdr_i (sctp_conn, *b, sctp_conn->state);
1515 sctp_data_retransmit (sctp_connection_t * sctp_conn)
1517 vlib_main_t *vm = vlib_get_main ();
1518 vlib_buffer_t *b = 0;
1519 u32 bi, n_bytes = 0;
1522 ("SCTP_CONN = %p, IDX = %u, S_INDEX = %u, C_INDEX = %u, sctp_conn->[...].LCL_PORT = %u, sctp_conn->[...].RMT_PORT = %u",
1523 sctp_conn, idx, sctp_conn->sub_conn[idx].connection.s_index,
1524 sctp_conn->sub_conn[idx].connection.c_index,
1525 sctp_conn->sub_conn[idx].connection.lcl_port,
1526 sctp_conn->sub_conn[idx].connection.rmt_port);
1528 if (sctp_conn->state >= SCTP_STATE_ESTABLISHED)
1533 u8 idx = sctp_data_subconn_select (sctp_conn);
1536 sctp_prepare_data_retransmit (sctp_conn, idx, 0,
1537 sctp_conn->sub_conn[idx].cwnd, &b);
1539 SCTP_DBG_OUTPUT ("We have data (%u bytes) to retransmit", n_bytes);
1541 bi = vlib_get_buffer_index (vm, b);
1543 sctp_enqueue_to_output_now (vm, b, bi,
1544 sctp_conn->sub_conn[idx].connection.is_ip4);
1549 #if SCTP_DEBUG_STATE_MACHINE
1551 sctp_validate_output_state_machine (sctp_connection_t * sctp_conn,
1555 switch (sctp_conn->state)
1557 case SCTP_STATE_CLOSED:
1558 if (chunk_type != INIT && chunk_type != INIT_ACK)
1561 case SCTP_STATE_ESTABLISHED:
1562 if (chunk_type != DATA && chunk_type != HEARTBEAT &&
1563 chunk_type != HEARTBEAT_ACK && chunk_type != SACK &&
1564 chunk_type != COOKIE_ACK && chunk_type != SHUTDOWN)
1567 case SCTP_STATE_COOKIE_WAIT:
1568 if (chunk_type != COOKIE_ECHO)
1571 case SCTP_STATE_SHUTDOWN_SENT:
1572 if (chunk_type != SHUTDOWN_COMPLETE)
1575 case SCTP_STATE_SHUTDOWN_RECEIVED:
1576 if (chunk_type != SHUTDOWN_ACK)
1585 sctp_is_retransmitting (sctp_connection_t * sctp_conn, u8 idx)
1587 return sctp_conn->sub_conn[idx].is_retransmitting;
1591 sctp46_output_inline (vlib_main_t * vm,
1592 vlib_node_runtime_t * node,
1593 vlib_frame_t * from_frame, int is_ip4)
1595 u32 n_left_from, next_index, *from, *to_next;
1596 u32 my_thread_index = vm->thread_index;
1598 from = vlib_frame_vector_args (from_frame);
1599 n_left_from = from_frame->n_vectors;
1600 next_index = node->cached_next_index;
1601 sctp_set_time_now (my_thread_index);
1603 while (n_left_from > 0)
1607 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1609 while (n_left_from > 0 && n_left_to_next > 0)
1613 sctp_header_t *sctp_hdr = 0;
1614 sctp_connection_t *sctp_conn;
1615 sctp_tx_trace_t *t0;
1616 sctp_header_t *th0 = 0;
1617 u32 error0 = SCTP_ERROR_PKTS_SENT, next0 =
1618 SCTP_OUTPUT_NEXT_IP_LOOKUP;
1620 #if SCTP_DEBUG_STATE_MACHINE
1621 u16 packet_length = 0;
1629 n_left_to_next -= 1;
1631 b0 = vlib_get_buffer (vm, bi0);
1634 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1637 if (PREDICT_FALSE (sctp_conn == 0))
1639 error0 = SCTP_ERROR_INVALID_CONNECTION;
1640 next0 = SCTP_OUTPUT_NEXT_DROP;
1644 u8 idx = vnet_buffer (b0)->sctp.subconn_idx;
1646 th0 = vlib_buffer_get_current (b0);
1650 ip4_header_t *iph4 = vlib_buffer_push_ip4 (vm,
1652 &sctp_conn->sub_conn
1659 IP_PROTOCOL_SCTP, 1);
1661 u32 checksum = ip4_sctp_compute_checksum (vm, b0, iph4);
1663 sctp_hdr = ip4_next_header (iph4);
1664 sctp_hdr->checksum = checksum;
1666 vnet_buffer (b0)->l4_hdr_offset = (u8 *) th0 - b0->data;
1668 #if SCTP_DEBUG_STATE_MACHINE
1669 packet_length = clib_net_to_host_u16 (iph4->length);
1674 ip6_header_t *iph6 = vlib_buffer_push_ip6 (vm,
1676 &sctp_conn->sub_conn
1680 &sctp_conn->sub_conn
1687 u32 checksum = ip6_sctp_compute_checksum (vm, b0, iph6, &bogus);
1690 sctp_hdr = ip6_next_header (iph6);
1691 sctp_hdr->checksum = checksum;
1693 vnet_buffer (b0)->l3_hdr_offset = (u8 *) iph6 - b0->data;
1694 vnet_buffer (b0)->l4_hdr_offset = (u8 *) th0 - b0->data;
1696 #if SCTP_DEBUG_STATE_MACHINE
1697 packet_length = clib_net_to_host_u16 (iph6->payload_length);
1701 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1702 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
1703 if (chunk_type >= UNKNOWN)
1706 ("Trying to send an unrecognized chunk... something is really bad.");
1707 error0 = SCTP_ERROR_UNKNOWN_CHUNK;
1708 next0 = SCTP_OUTPUT_NEXT_DROP;
1712 #if SCTP_DEBUG_STATE_MACHINE
1714 (sctp_conn->sub_conn[idx].connection.lcl_port ==
1716 || sctp_conn->sub_conn[idx].connection.lcl_port ==
1718 && (sctp_conn->sub_conn[idx].connection.rmt_port ==
1720 || sctp_conn->sub_conn[idx].connection.rmt_port ==
1721 sctp_hdr->src_port);
1725 SCTP_DBG_STATE_MACHINE ("BUFFER IS INCORRECT: conn_index = %u, "
1726 "packet_length = %u, "
1727 "chunk_type = %u [%s], "
1728 "connection.lcl_port = %u, sctp_hdr->src_port = %u, "
1729 "connection.rmt_port = %u, sctp_hdr->dst_port = %u",
1730 sctp_conn->sub_conn[idx].
1731 connection.c_index, packet_length,
1733 sctp_chunk_to_string (chunk_type),
1734 sctp_conn->sub_conn[idx].
1735 connection.lcl_port, sctp_hdr->src_port,
1736 sctp_conn->sub_conn[idx].
1737 connection.rmt_port,
1738 sctp_hdr->dst_port);
1740 error0 = SCTP_ERROR_UNKNOWN_CHUNK;
1741 next0 = SCTP_OUTPUT_NEXT_DROP;
1745 SCTP_DBG_STATE_MACHINE
1746 ("SESSION_INDEX = %u, CONN_INDEX = %u, CURR_CONN_STATE = %u (%s), "
1747 "CHUNK_TYPE = %s, " "SRC_PORT = %u, DST_PORT = %u",
1748 sctp_conn->sub_conn[idx].connection.s_index,
1749 sctp_conn->sub_conn[idx].connection.c_index,
1750 sctp_conn->state, sctp_state_to_string (sctp_conn->state),
1751 sctp_chunk_to_string (chunk_type), full_hdr->hdr.src_port,
1752 full_hdr->hdr.dst_port);
1754 /* Let's make sure the state-machine does not send anything crazy */
1755 #if SCTP_DEBUG_STATE_MACHINE
1756 if (sctp_validate_output_state_machine (sctp_conn, chunk_type) != 0)
1758 SCTP_DBG_STATE_MACHINE
1759 ("Sending the wrong chunk (%s) based on state-machine status (%s)",
1760 sctp_chunk_to_string (chunk_type),
1761 sctp_state_to_string (sctp_conn->state));
1763 error0 = SCTP_ERROR_UNKNOWN_CHUNK;
1764 next0 = SCTP_OUTPUT_NEXT_DROP;
1770 /* Karn's algorithm: RTT measurements MUST NOT be made using
1771 * packets that were retransmitted
1773 if (!sctp_is_retransmitting (sctp_conn, idx))
1775 /* Measure RTT with this */
1776 if (chunk_type == DATA
1777 && sctp_conn->sub_conn[idx].RTO_pending == 0)
1779 sctp_conn->sub_conn[idx].RTO_pending = 1;
1780 sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
1783 sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
1786 /* Let's take care of TIMERS */
1791 sctp_conn->state = SCTP_STATE_COOKIE_ECHOED;
1796 SCTP_ADV_DBG_OUTPUT ("PACKET_LENGTH = %u", packet_length);
1798 sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T3_RXTX,
1799 sctp_conn->sub_conn[idx].RTO);
1804 /* Start the SCTP_TIMER_T2_SHUTDOWN timer */
1805 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T2_SHUTDOWN,
1806 sctp_conn->sub_conn[idx].RTO);
1807 sctp_conn->state = SCTP_STATE_SHUTDOWN_SENT;
1812 /* Start the SCTP_TIMER_T2_SHUTDOWN timer */
1813 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T2_SHUTDOWN,
1814 sctp_conn->sub_conn[idx].RTO);
1815 sctp_conn->state = SCTP_STATE_SHUTDOWN_ACK_SENT;
1818 case SHUTDOWN_COMPLETE:
1820 sctp_conn->state = SCTP_STATE_CLOSED;
1825 vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
1826 vnet_buffer (b0)->sw_if_index[VLIB_TX] =
1827 sctp_conn->sub_conn[idx].c_fib_index;
1829 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
1831 SCTP_DBG_STATE_MACHINE
1832 ("SESSION_INDEX = %u, CONNECTION_INDEX = %u, " "NEW_STATE = %s, "
1833 "CHUNK_SENT = %s", sctp_conn->sub_conn[idx].connection.s_index,
1834 sctp_conn->sub_conn[idx].connection.c_index,
1835 sctp_state_to_string (sctp_conn->state),
1836 sctp_chunk_to_string (chunk_type));
1838 vnet_sctp_common_hdr_params_host_to_net (&full_hdr->common_hdr);
1841 b0->error = node->errors[error0];
1842 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1844 t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
1847 clib_memcpy (&t0->sctp_header, th0,
1848 sizeof (t0->sctp_header));
1852 memset (&t0->sctp_header, 0, sizeof (t0->sctp_header));
1854 clib_memcpy (&t0->sctp_connection, sctp_conn,
1855 sizeof (t0->sctp_connection));
1858 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1859 n_left_to_next, bi0, next0);
1862 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1865 return from_frame->n_vectors;
1869 sctp4_output (vlib_main_t * vm, vlib_node_runtime_t * node,
1870 vlib_frame_t * from_frame)
1872 return sctp46_output_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1876 sctp6_output (vlib_main_t * vm, vlib_node_runtime_t * node,
1877 vlib_frame_t * from_frame)
1879 return sctp46_output_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1883 VLIB_REGISTER_NODE (sctp4_output_node) =
1885 .function = sctp4_output,.name = "sctp4-output",
1886 /* Takes a vector of packets. */
1887 .vector_size = sizeof (u32),
1888 .n_errors = SCTP_N_ERROR,
1889 .error_strings = sctp_error_strings,
1890 .n_next_nodes = SCTP_OUTPUT_N_NEXT,
1892 #define _(s,n) [SCTP_OUTPUT_NEXT_##s] = n,
1893 foreach_sctp4_output_next
1896 .format_buffer = format_sctp_header,
1897 .format_trace = format_sctp_tx_trace,
1901 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_output_node, sctp4_output);
1904 VLIB_REGISTER_NODE (sctp6_output_node) =
1906 .function = sctp6_output,
1907 .name = "sctp6-output",
1908 /* Takes a vector of packets. */
1909 .vector_size = sizeof (u32),
1910 .n_errors = SCTP_N_ERROR,
1911 .error_strings = sctp_error_strings,
1912 .n_next_nodes = SCTP_OUTPUT_N_NEXT,
1914 #define _(s,n) [SCTP_OUTPUT_NEXT_##s] = n,
1915 foreach_sctp6_output_next
1918 .format_buffer = format_sctp_header,
1919 .format_trace = format_sctp_tx_trace,
1923 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_output_node, sctp6_output);
1926 * fd.io coding-style-patch-verification: ON
1929 * eval: (c-set-style "gnu")