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);
412 * Convert buffer to INIT
415 sctp_prepare_init_chunk (sctp_connection_t * sctp_conn, u8 idx,
418 u32 random_seed = random_default_seed ();
419 u16 alloc_bytes = sizeof (sctp_init_chunk_t);
420 sctp_sub_connection_t *sub_conn = &sctp_conn->sub_conn[idx];
422 sctp_ipv4_addr_param_t *ip4_param = 0;
423 sctp_ipv6_addr_param_t *ip6_param = 0;
425 if (sub_conn->c_is_ip4)
426 alloc_bytes += sizeof (sctp_ipv4_addr_param_t);
428 alloc_bytes += sizeof (sctp_ipv6_addr_param_t);
430 /* As per RFC 4960 the chunk_length value does NOT contemplate
431 * the size of the first header (see sctp_header_t) and any padding
433 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
435 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
437 sctp_init_chunk_t *init_chunk = vlib_buffer_push_uninit (b, alloc_bytes);
439 u16 pointer_offset = sizeof (init_chunk);
440 if (sub_conn->c_is_ip4)
442 ip4_param = (sctp_ipv4_addr_param_t *) init_chunk + pointer_offset;
443 ip4_param->address.as_u32 = sub_conn->c_lcl_ip.ip4.as_u32;
445 pointer_offset += sizeof (sctp_ipv4_addr_param_t);
449 ip6_param = (sctp_ipv6_addr_param_t *) init_chunk + pointer_offset;
450 ip6_param->address.as_u64[0] = sub_conn->c_lcl_ip.ip6.as_u64[0];
451 ip6_param->address.as_u64[1] = sub_conn->c_lcl_ip.ip6.as_u64[1];
453 pointer_offset += sizeof (sctp_ipv6_addr_param_t);
456 init_chunk->sctp_hdr.src_port = sub_conn->c_lcl_port; /* No need of host_to_net conversion, already in net-byte order */
457 init_chunk->sctp_hdr.dst_port = sub_conn->c_rmt_port; /* No need of host_to_net conversion, already in net-byte order */
458 init_chunk->sctp_hdr.checksum = 0;
459 /* The sender of an INIT must set the VERIFICATION_TAG to 0 as per RFC 4960 Section 8.5.1 */
460 init_chunk->sctp_hdr.verification_tag = 0x0;
462 vnet_sctp_set_chunk_type (&init_chunk->chunk_hdr, INIT);
463 vnet_sctp_set_chunk_length (&init_chunk->chunk_hdr, chunk_len);
464 vnet_sctp_common_hdr_params_host_to_net (&init_chunk->chunk_hdr);
466 sctp_init_cwnd (sctp_conn);
468 init_chunk->a_rwnd = clib_host_to_net_u32 (sctp_conn->sub_conn[idx].cwnd);
469 init_chunk->initiate_tag = clib_host_to_net_u32 (random_u32 (&random_seed));
470 init_chunk->inboud_streams_count =
471 clib_host_to_net_u16 (INBOUND_STREAMS_COUNT);
472 init_chunk->outbound_streams_count =
473 clib_host_to_net_u16 (OUTBOUND_STREAMS_COUNT);
475 init_chunk->initial_tsn =
476 clib_host_to_net_u32 (sctp_conn->local_initial_tsn);
477 SCTP_CONN_TRACKING_DBG ("sctp_conn->local_initial_tsn = %u",
478 sctp_conn->local_initial_tsn);
480 sctp_conn->local_tag = init_chunk->initiate_tag;
482 vnet_buffer (b)->sctp.connection_index = sub_conn->c_c_index;
483 vnet_buffer (b)->sctp.subconn_idx = idx;
485 SCTP_DBG_STATE_MACHINE ("CONN_INDEX = %u, CURR_CONN_STATE = %u (%s), "
487 "SRC_PORT = %u, DST_PORT = %u",
488 sub_conn->connection.c_index,
490 sctp_state_to_string (sctp_conn->state),
491 sctp_chunk_to_string (INIT),
492 init_chunk->sctp_hdr.src_port,
493 init_chunk->sctp_hdr.dst_port);
497 sctp_compute_mac (sctp_connection_t * sctp_conn,
498 sctp_state_cookie_param_t * state_cookie)
500 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
505 unsigned int len = 0;
506 const EVP_MD *md = EVP_sha1 ();
507 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
508 ctx = HMAC_CTX_new ();
509 HMAC_Init_ex (ctx, &state_cookie->creation_time,
510 sizeof (state_cookie->creation_time), md, NULL);
511 HMAC_Update (ctx, (const unsigned char *) &sctp_conn, sizeof (sctp_conn));
512 HMAC_Final (ctx, state_cookie->mac, &len);
514 HMAC_CTX_init (&ctx);
515 HMAC_Init_ex (&ctx, &state_cookie->creation_time,
516 sizeof (state_cookie->creation_time), md, NULL);
517 HMAC_Update (&ctx, (const unsigned char *) &sctp_conn, sizeof (sctp_conn));
518 HMAC_Final (&ctx, state_cookie->mac, &len);
519 HMAC_CTX_cleanup (&ctx);
522 ENDIANESS_SWAP (state_cookie->mac);
526 sctp_prepare_cookie_ack_chunk (sctp_connection_t * sctp_conn, u8 idx,
529 vlib_main_t *vm = vlib_get_main ();
531 sctp_reuse_buffer (vm, b);
533 u16 alloc_bytes = sizeof (sctp_cookie_ack_chunk_t);
535 /* As per RFC 4960 the chunk_length value does NOT contemplate
536 * the size of the first header (see sctp_header_t) and any padding
538 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
540 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
542 sctp_cookie_ack_chunk_t *cookie_ack_chunk =
543 vlib_buffer_push_uninit (b, alloc_bytes);
545 cookie_ack_chunk->sctp_hdr.checksum = 0;
546 cookie_ack_chunk->sctp_hdr.src_port =
547 sctp_conn->sub_conn[idx].connection.lcl_port;
548 cookie_ack_chunk->sctp_hdr.dst_port =
549 sctp_conn->sub_conn[idx].connection.rmt_port;
550 cookie_ack_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag;
551 vnet_sctp_set_chunk_type (&cookie_ack_chunk->chunk_hdr, COOKIE_ACK);
552 vnet_sctp_set_chunk_length (&cookie_ack_chunk->chunk_hdr, chunk_len);
554 vnet_buffer (b)->sctp.connection_index =
555 sctp_conn->sub_conn[idx].connection.c_index;
556 vnet_buffer (b)->sctp.subconn_idx = idx;
560 sctp_prepare_cookie_echo_chunk (sctp_connection_t * sctp_conn, u8 idx,
561 vlib_buffer_t * b, u8 reuse_buffer)
563 vlib_main_t *vm = vlib_get_main ();
566 sctp_reuse_buffer (vm, b);
568 /* The minimum size of the message is given by the sctp_init_ack_chunk_t */
569 u16 alloc_bytes = sizeof (sctp_cookie_echo_chunk_t);
570 /* As per RFC 4960 the chunk_length value does NOT contemplate
571 * the size of the first header (see sctp_header_t) and any padding
573 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
574 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
575 sctp_cookie_echo_chunk_t *cookie_echo_chunk =
576 vlib_buffer_push_uninit (b, alloc_bytes);
577 cookie_echo_chunk->sctp_hdr.checksum = 0;
578 cookie_echo_chunk->sctp_hdr.src_port =
579 sctp_conn->sub_conn[idx].connection.lcl_port;
580 cookie_echo_chunk->sctp_hdr.dst_port =
581 sctp_conn->sub_conn[idx].connection.rmt_port;
582 cookie_echo_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag;
583 vnet_sctp_set_chunk_type (&cookie_echo_chunk->chunk_hdr, COOKIE_ECHO);
584 vnet_sctp_set_chunk_length (&cookie_echo_chunk->chunk_hdr, chunk_len);
585 clib_memcpy (&(cookie_echo_chunk->cookie), &sctp_conn->cookie_param,
586 sizeof (sctp_state_cookie_param_t));
588 vnet_buffer (b)->sctp.connection_index =
589 sctp_conn->sub_conn[idx].connection.c_index;
590 vnet_buffer (b)->sctp.subconn_idx = idx;
598 sctp_send_cookie_echo (sctp_connection_t * sctp_conn)
602 sctp_main_t *tm = vnet_get_sctp_main ();
603 vlib_main_t *vm = vlib_get_main ();
605 if (PREDICT_FALSE (sctp_conn->init_retransmit_err > SCTP_MAX_INIT_RETRANS))
607 clib_warning ("Reached MAX_INIT_RETRANS times. Aborting connection.");
609 session_stream_connect_notify (&sctp_conn->sub_conn
610 [SCTP_PRIMARY_PATH_IDX].connection, 1);
612 sctp_connection_timers_reset (sctp_conn);
614 sctp_connection_cleanup (sctp_conn);
617 if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi)))
620 b = vlib_get_buffer (vm, bi);
621 u8 idx = SCTP_PRIMARY_PATH_IDX;
623 sctp_init_buffer (vm, b);
624 sctp_prepare_cookie_echo_chunk (sctp_conn, idx, b, 0);
625 sctp_enqueue_to_output_now (vm, b, bi, sctp_conn->sub_conn[idx].c_is_ip4);
627 /* Start the T1_INIT timer */
628 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T1_INIT,
629 sctp_conn->sub_conn[idx].RTO);
631 /* Change state to COOKIE_WAIT */
632 sctp_conn->state = SCTP_STATE_COOKIE_WAIT;
634 /* Measure RTT with this */
635 sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
640 * Convert buffer to ERROR
643 sctp_prepare_operation_error (sctp_connection_t * sctp_conn, u8 idx,
644 vlib_buffer_t * b, u8 err_cause)
646 vlib_main_t *vm = vlib_get_main ();
648 sctp_reuse_buffer (vm, b);
650 /* The minimum size of the message is given by the sctp_operation_error_t */
652 sizeof (sctp_operation_error_t) + sizeof (sctp_err_cause_param_t);
654 /* As per RFC 4960 the chunk_length value does NOT contemplate
655 * the size of the first header (see sctp_header_t) and any padding
657 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
659 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
661 sctp_operation_error_t *err_chunk =
662 vlib_buffer_push_uninit (b, alloc_bytes);
664 /* src_port & dst_port are already in network byte-order */
665 err_chunk->sctp_hdr.checksum = 0;
666 err_chunk->sctp_hdr.src_port = sctp_conn->sub_conn[idx].connection.lcl_port;
667 err_chunk->sctp_hdr.dst_port = sctp_conn->sub_conn[idx].connection.rmt_port;
668 /* As per RFC4960 Section 5.2.2: copy the INITIATE_TAG into the VERIFICATION_TAG of the ABORT chunk */
669 err_chunk->sctp_hdr.verification_tag = sctp_conn->local_tag;
671 err_chunk->err_causes[0].param_hdr.length =
672 clib_host_to_net_u16 (sizeof (err_chunk->err_causes[0].param_hdr.type) +
673 sizeof (err_chunk->err_causes[0].param_hdr.length));
674 err_chunk->err_causes[0].param_hdr.type = clib_host_to_net_u16 (err_cause);
676 vnet_sctp_set_chunk_type (&err_chunk->chunk_hdr, OPERATION_ERROR);
677 vnet_sctp_set_chunk_length (&err_chunk->chunk_hdr, chunk_len);
679 vnet_buffer (b)->sctp.connection_index =
680 sctp_conn->sub_conn[idx].connection.c_index;
681 vnet_buffer (b)->sctp.subconn_idx = idx;
685 * Convert buffer to ABORT
688 sctp_prepare_abort_for_collision (sctp_connection_t * sctp_conn, u8 idx,
689 vlib_buffer_t * b, ip4_address_t * ip4_addr,
690 ip6_address_t * ip6_addr)
692 vlib_main_t *vm = vlib_get_main ();
694 sctp_reuse_buffer (vm, b);
696 /* The minimum size of the message is given by the sctp_abort_chunk_t */
697 u16 alloc_bytes = sizeof (sctp_abort_chunk_t);
699 /* As per RFC 4960 the chunk_length value does NOT contemplate
700 * the size of the first header (see sctp_header_t) and any padding
702 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
704 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
706 sctp_abort_chunk_t *abort_chunk = vlib_buffer_push_uninit (b, alloc_bytes);
708 /* src_port & dst_port are already in network byte-order */
709 abort_chunk->sctp_hdr.checksum = 0;
710 abort_chunk->sctp_hdr.src_port =
711 sctp_conn->sub_conn[idx].connection.lcl_port;
712 abort_chunk->sctp_hdr.dst_port =
713 sctp_conn->sub_conn[idx].connection.rmt_port;
714 /* As per RFC4960 Section 5.2.2: copy the INITIATE_TAG into the VERIFICATION_TAG of the ABORT chunk */
715 abort_chunk->sctp_hdr.verification_tag = sctp_conn->local_tag;
717 vnet_sctp_set_chunk_type (&abort_chunk->chunk_hdr, ABORT);
718 vnet_sctp_set_chunk_length (&abort_chunk->chunk_hdr, chunk_len);
720 vnet_buffer (b)->sctp.connection_index =
721 sctp_conn->sub_conn[idx].connection.c_index;
722 vnet_buffer (b)->sctp.subconn_idx = idx;
726 * Convert buffer to INIT-ACK
729 sctp_prepare_initack_chunk_for_collision (sctp_connection_t * sctp_conn,
730 u8 idx, vlib_buffer_t * b,
731 ip4_address_t * ip4_addr,
732 ip6_address_t * ip6_addr)
734 vlib_main_t *vm = vlib_get_main ();
735 sctp_ipv4_addr_param_t *ip4_param = 0;
736 sctp_ipv6_addr_param_t *ip6_param = 0;
738 sctp_reuse_buffer (vm, b);
740 /* The minimum size of the message is given by the sctp_init_ack_chunk_t */
742 sizeof (sctp_init_ack_chunk_t) + sizeof (sctp_state_cookie_param_t);
744 if (PREDICT_TRUE (ip4_addr != NULL))
746 /* Create room for variable-length fields in the INIT_ACK chunk */
747 alloc_bytes += SCTP_IPV4_ADDRESS_TYPE_LENGTH;
749 if (PREDICT_TRUE (ip6_addr != NULL))
751 /* Create room for variable-length fields in the INIT_ACK chunk */
752 alloc_bytes += SCTP_IPV6_ADDRESS_TYPE_LENGTH;
755 if (sctp_conn->sub_conn[idx].connection.is_ip4)
756 alloc_bytes += sizeof (sctp_ipv4_addr_param_t);
758 alloc_bytes += sizeof (sctp_ipv6_addr_param_t);
760 /* As per RFC 4960 the chunk_length value does NOT contemplate
761 * the size of the first header (see sctp_header_t) and any padding
763 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
765 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
767 sctp_init_ack_chunk_t *init_ack_chunk =
768 vlib_buffer_push_uninit (b, alloc_bytes);
770 u16 pointer_offset = sizeof (sctp_init_ack_chunk_t);
772 /* Create State Cookie parameter */
773 sctp_state_cookie_param_t *state_cookie_param =
774 (sctp_state_cookie_param_t *) ((char *) init_ack_chunk + pointer_offset);
776 state_cookie_param->param_hdr.type =
777 clib_host_to_net_u16 (SCTP_STATE_COOKIE_TYPE);
778 state_cookie_param->param_hdr.length =
779 clib_host_to_net_u16 (sizeof (sctp_state_cookie_param_t));
780 state_cookie_param->creation_time = clib_host_to_net_u32 (sctp_time_now ());
781 state_cookie_param->cookie_lifespan =
782 clib_host_to_net_u32 (SCTP_VALID_COOKIE_LIFE);
784 sctp_compute_mac (sctp_conn, state_cookie_param);
786 pointer_offset += sizeof (sctp_state_cookie_param_t);
788 if (PREDICT_TRUE (ip4_addr != NULL))
790 sctp_ipv4_addr_param_t *ipv4_addr =
791 (sctp_ipv4_addr_param_t *) init_ack_chunk + pointer_offset;
793 ipv4_addr->param_hdr.type =
794 clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE);
795 ipv4_addr->param_hdr.length =
796 clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE_LENGTH);
797 ipv4_addr->address.as_u32 = ip4_addr->as_u32;
799 pointer_offset += SCTP_IPV4_ADDRESS_TYPE_LENGTH;
801 if (PREDICT_TRUE (ip6_addr != NULL))
803 sctp_ipv6_addr_param_t *ipv6_addr =
804 (sctp_ipv6_addr_param_t *) init_ack_chunk + pointer_offset;
806 ipv6_addr->param_hdr.type =
807 clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE);
808 ipv6_addr->param_hdr.length =
809 clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE_LENGTH);
810 ipv6_addr->address.as_u64[0] = ip6_addr->as_u64[0];
811 ipv6_addr->address.as_u64[1] = ip6_addr->as_u64[1];
813 pointer_offset += SCTP_IPV6_ADDRESS_TYPE_LENGTH;
816 if (sctp_conn->sub_conn[idx].connection.is_ip4)
818 ip4_param = (sctp_ipv4_addr_param_t *) init_ack_chunk + pointer_offset;
819 ip4_param->address.as_u32 =
820 sctp_conn->sub_conn[idx].connection.lcl_ip.ip4.as_u32;
822 pointer_offset += sizeof (sctp_ipv4_addr_param_t);
826 ip6_param = (sctp_ipv6_addr_param_t *) init_ack_chunk + pointer_offset;
827 ip6_param->address.as_u64[0] =
828 sctp_conn->sub_conn[idx].connection.lcl_ip.ip6.as_u64[0];
829 ip6_param->address.as_u64[1] =
830 sctp_conn->sub_conn[idx].connection.lcl_ip.ip6.as_u64[1];
832 pointer_offset += sizeof (sctp_ipv6_addr_param_t);
835 /* src_port & dst_port are already in network byte-order */
836 init_ack_chunk->sctp_hdr.checksum = 0;
837 init_ack_chunk->sctp_hdr.src_port =
838 sctp_conn->sub_conn[idx].connection.lcl_port;
839 init_ack_chunk->sctp_hdr.dst_port =
840 sctp_conn->sub_conn[idx].connection.rmt_port;
841 /* the sctp_conn->verification_tag is already in network byte-order (being a copy of the init_tag coming with the INIT chunk) */
842 init_ack_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag;
843 init_ack_chunk->initial_tsn =
844 clib_host_to_net_u32 (sctp_conn->local_initial_tsn);
845 SCTP_CONN_TRACKING_DBG ("init_ack_chunk->initial_tsn = %u",
846 init_ack_chunk->initial_tsn);
848 vnet_sctp_set_chunk_type (&init_ack_chunk->chunk_hdr, INIT_ACK);
849 vnet_sctp_set_chunk_length (&init_ack_chunk->chunk_hdr, chunk_len);
851 init_ack_chunk->initiate_tag = sctp_conn->local_tag;
853 init_ack_chunk->a_rwnd =
854 clib_host_to_net_u32 (sctp_conn->sub_conn[idx].cwnd);
855 init_ack_chunk->inboud_streams_count =
856 clib_host_to_net_u16 (INBOUND_STREAMS_COUNT);
857 init_ack_chunk->outbound_streams_count =
858 clib_host_to_net_u16 (OUTBOUND_STREAMS_COUNT);
860 vnet_buffer (b)->sctp.connection_index =
861 sctp_conn->sub_conn[idx].connection.c_index;
862 vnet_buffer (b)->sctp.subconn_idx = idx;
866 * Convert buffer to INIT-ACK
869 sctp_prepare_initack_chunk (sctp_connection_t * sctp_conn, u8 idx,
870 vlib_buffer_t * b, ip4_address_t * ip4_addr,
871 ip6_address_t * ip6_addr)
873 vlib_main_t *vm = vlib_get_main ();
874 sctp_ipv4_addr_param_t *ip4_param = 0;
875 sctp_ipv6_addr_param_t *ip6_param = 0;
876 u32 random_seed = random_default_seed ();
878 sctp_reuse_buffer (vm, b);
880 /* The minimum size of the message is given by the sctp_init_ack_chunk_t */
882 sizeof (sctp_init_ack_chunk_t) + sizeof (sctp_state_cookie_param_t);
884 if (PREDICT_TRUE (ip4_addr != NULL))
886 /* Create room for variable-length fields in the INIT_ACK chunk */
887 alloc_bytes += SCTP_IPV4_ADDRESS_TYPE_LENGTH;
889 if (PREDICT_TRUE (ip6_addr != NULL))
891 /* Create room for variable-length fields in the INIT_ACK chunk */
892 alloc_bytes += SCTP_IPV6_ADDRESS_TYPE_LENGTH;
895 if (sctp_conn->sub_conn[idx].connection.is_ip4)
896 alloc_bytes += sizeof (sctp_ipv4_addr_param_t);
898 alloc_bytes += sizeof (sctp_ipv6_addr_param_t);
900 /* As per RFC 4960 the chunk_length value does NOT contemplate
901 * the size of the first header (see sctp_header_t) and any padding
903 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
905 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
907 sctp_init_ack_chunk_t *init_ack_chunk =
908 vlib_buffer_push_uninit (b, alloc_bytes);
910 u16 pointer_offset = sizeof (sctp_init_ack_chunk_t);
912 /* Create State Cookie parameter */
913 sctp_state_cookie_param_t *state_cookie_param =
914 (sctp_state_cookie_param_t *) ((char *) init_ack_chunk + pointer_offset);
916 state_cookie_param->param_hdr.type =
917 clib_host_to_net_u16 (SCTP_STATE_COOKIE_TYPE);
918 state_cookie_param->param_hdr.length =
919 clib_host_to_net_u16 (sizeof (sctp_state_cookie_param_t));
920 state_cookie_param->creation_time = clib_host_to_net_u32 (sctp_time_now ());
921 state_cookie_param->cookie_lifespan =
922 clib_host_to_net_u32 (SCTP_VALID_COOKIE_LIFE);
924 sctp_compute_mac (sctp_conn, state_cookie_param);
926 pointer_offset += sizeof (sctp_state_cookie_param_t);
928 if (PREDICT_TRUE (ip4_addr != NULL))
930 sctp_ipv4_addr_param_t *ipv4_addr =
931 (sctp_ipv4_addr_param_t *) init_ack_chunk + pointer_offset;
933 ipv4_addr->param_hdr.type =
934 clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE);
935 ipv4_addr->param_hdr.length =
936 clib_host_to_net_u16 (SCTP_IPV4_ADDRESS_TYPE_LENGTH);
937 ipv4_addr->address.as_u32 = ip4_addr->as_u32;
939 pointer_offset += SCTP_IPV4_ADDRESS_TYPE_LENGTH;
941 if (PREDICT_TRUE (ip6_addr != NULL))
943 sctp_ipv6_addr_param_t *ipv6_addr =
944 (sctp_ipv6_addr_param_t *) init_ack_chunk + pointer_offset;
946 ipv6_addr->param_hdr.type =
947 clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE);
948 ipv6_addr->param_hdr.length =
949 clib_host_to_net_u16 (SCTP_IPV6_ADDRESS_TYPE_LENGTH);
950 ipv6_addr->address.as_u64[0] = ip6_addr->as_u64[0];
951 ipv6_addr->address.as_u64[1] = ip6_addr->as_u64[1];
953 pointer_offset += SCTP_IPV6_ADDRESS_TYPE_LENGTH;
956 if (sctp_conn->sub_conn[idx].connection.is_ip4)
958 ip4_param = (sctp_ipv4_addr_param_t *) init_ack_chunk + pointer_offset;
959 ip4_param->address.as_u32 =
960 sctp_conn->sub_conn[idx].connection.lcl_ip.ip4.as_u32;
962 pointer_offset += sizeof (sctp_ipv4_addr_param_t);
966 ip6_param = (sctp_ipv6_addr_param_t *) init_ack_chunk + pointer_offset;
967 ip6_param->address.as_u64[0] =
968 sctp_conn->sub_conn[idx].connection.lcl_ip.ip6.as_u64[0];
969 ip6_param->address.as_u64[1] =
970 sctp_conn->sub_conn[idx].connection.lcl_ip.ip6.as_u64[1];
972 pointer_offset += sizeof (sctp_ipv6_addr_param_t);
975 /* src_port & dst_port are already in network byte-order */
976 init_ack_chunk->sctp_hdr.checksum = 0;
977 init_ack_chunk->sctp_hdr.src_port =
978 sctp_conn->sub_conn[idx].connection.lcl_port;
979 init_ack_chunk->sctp_hdr.dst_port =
980 sctp_conn->sub_conn[idx].connection.rmt_port;
981 /* the sctp_conn->verification_tag is already in network byte-order (being a copy of the init_tag coming with the INIT chunk) */
982 init_ack_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag;
983 init_ack_chunk->initial_tsn =
984 clib_host_to_net_u32 (sctp_conn->local_initial_tsn);
985 SCTP_CONN_TRACKING_DBG ("init_ack_chunk->initial_tsn = %u",
986 init_ack_chunk->initial_tsn);
988 vnet_sctp_set_chunk_type (&init_ack_chunk->chunk_hdr, INIT_ACK);
989 vnet_sctp_set_chunk_length (&init_ack_chunk->chunk_hdr, chunk_len);
991 init_ack_chunk->initiate_tag =
992 clib_host_to_net_u32 (random_u32 (&random_seed));
994 init_ack_chunk->a_rwnd =
995 clib_host_to_net_u32 (sctp_conn->sub_conn[idx].cwnd);
996 init_ack_chunk->inboud_streams_count =
997 clib_host_to_net_u16 (INBOUND_STREAMS_COUNT);
998 init_ack_chunk->outbound_streams_count =
999 clib_host_to_net_u16 (OUTBOUND_STREAMS_COUNT);
1001 sctp_conn->local_tag = init_ack_chunk->initiate_tag;
1003 vnet_buffer (b)->sctp.connection_index =
1004 sctp_conn->sub_conn[idx].connection.c_index;
1005 vnet_buffer (b)->sctp.subconn_idx = idx;
1009 * Convert buffer to SHUTDOWN
1012 sctp_prepare_shutdown_chunk (sctp_connection_t * sctp_conn, u8 idx,
1015 u16 alloc_bytes = sizeof (sctp_shutdown_association_chunk_t);
1017 /* As per RFC 4960 the chunk_length value does NOT contemplate
1018 * the size of the first header (see sctp_header_t) and any padding
1020 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
1022 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
1024 sctp_shutdown_association_chunk_t *shutdown_chunk =
1025 vlib_buffer_push_uninit (b, alloc_bytes);
1027 shutdown_chunk->sctp_hdr.checksum = 0;
1028 /* No need of host_to_net conversion, already in net-byte order */
1029 shutdown_chunk->sctp_hdr.src_port =
1030 sctp_conn->sub_conn[idx].connection.lcl_port;
1031 shutdown_chunk->sctp_hdr.dst_port =
1032 sctp_conn->sub_conn[idx].connection.rmt_port;
1033 shutdown_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag;
1034 vnet_sctp_set_chunk_type (&shutdown_chunk->chunk_hdr, SHUTDOWN);
1035 vnet_sctp_set_chunk_length (&shutdown_chunk->chunk_hdr, chunk_len);
1037 shutdown_chunk->cumulative_tsn_ack = sctp_conn->last_rcvd_tsn;
1039 vnet_buffer (b)->sctp.connection_index =
1040 sctp_conn->sub_conn[idx].connection.c_index;
1041 vnet_buffer (b)->sctp.subconn_idx = idx;
1048 sctp_send_shutdown (sctp_connection_t * sctp_conn)
1052 sctp_main_t *tm = vnet_get_sctp_main ();
1053 vlib_main_t *vm = vlib_get_main ();
1055 if (sctp_check_outstanding_data_chunks (sctp_conn) > 0)
1058 if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi)))
1061 u8 idx = SCTP_PRIMARY_PATH_IDX;
1063 b = vlib_get_buffer (vm, bi);
1064 sctp_init_buffer (vm, b);
1065 sctp_prepare_shutdown_chunk (sctp_conn, idx, b);
1067 sctp_enqueue_to_output_now (vm, b, bi,
1068 sctp_conn->sub_conn[idx].connection.is_ip4);
1072 * Convert buffer to SHUTDOWN_ACK
1075 sctp_prepare_shutdown_ack_chunk (sctp_connection_t * sctp_conn, u8 idx,
1078 u16 alloc_bytes = sizeof (sctp_shutdown_association_chunk_t);
1079 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
1081 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
1083 sctp_shutdown_ack_chunk_t *shutdown_ack_chunk =
1084 vlib_buffer_push_uninit (b, alloc_bytes);
1086 shutdown_ack_chunk->sctp_hdr.checksum = 0;
1087 /* No need of host_to_net conversion, already in net-byte order */
1088 shutdown_ack_chunk->sctp_hdr.src_port =
1089 sctp_conn->sub_conn[idx].connection.lcl_port;
1090 shutdown_ack_chunk->sctp_hdr.dst_port =
1091 sctp_conn->sub_conn[idx].connection.rmt_port;
1092 shutdown_ack_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag;
1094 vnet_sctp_set_chunk_type (&shutdown_ack_chunk->chunk_hdr, SHUTDOWN_ACK);
1095 vnet_sctp_set_chunk_length (&shutdown_ack_chunk->chunk_hdr, chunk_len);
1097 vnet_buffer (b)->sctp.connection_index =
1098 sctp_conn->sub_conn[idx].connection.c_index;
1099 vnet_buffer (b)->sctp.subconn_idx = idx;
1106 sctp_send_shutdown_ack (sctp_connection_t * sctp_conn, u8 idx,
1109 vlib_main_t *vm = vlib_get_main ();
1111 if (sctp_check_outstanding_data_chunks (sctp_conn) > 0)
1114 sctp_reuse_buffer (vm, b);
1116 sctp_prepare_shutdown_ack_chunk (sctp_conn, idx, b);
1120 * Convert buffer to SACK
1123 sctp_prepare_sack_chunk (sctp_connection_t * sctp_conn, u8 idx,
1126 vlib_main_t *vm = vlib_get_main ();
1128 sctp_reuse_buffer (vm, b);
1130 u16 alloc_bytes = sizeof (sctp_selective_ack_chunk_t);
1132 /* As per RFC 4960 the chunk_length value does NOT contemplate
1133 * the size of the first header (see sctp_header_t) and any padding
1135 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
1137 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
1139 sctp_selective_ack_chunk_t *sack = vlib_buffer_push_uninit (b, alloc_bytes);
1141 sack->sctp_hdr.checksum = 0;
1142 sack->sctp_hdr.src_port = sctp_conn->sub_conn[idx].connection.lcl_port;
1143 sack->sctp_hdr.dst_port = sctp_conn->sub_conn[idx].connection.rmt_port;
1144 sack->sctp_hdr.verification_tag = sctp_conn->remote_tag;
1145 vnet_sctp_set_chunk_type (&sack->chunk_hdr, SACK);
1146 vnet_sctp_set_chunk_length (&sack->chunk_hdr, chunk_len);
1148 sack->cumulative_tsn_ack = sctp_conn->next_tsn_expected;
1150 sctp_conn->ack_state = 0;
1152 vnet_buffer (b)->sctp.connection_index =
1153 sctp_conn->sub_conn[idx].connection.c_index;
1154 vnet_buffer (b)->sctp.subconn_idx = idx;
1158 * Convert buffer to HEARTBEAT_ACK
1161 sctp_prepare_heartbeat_ack_chunk (sctp_connection_t * sctp_conn, u8 idx,
1164 vlib_main_t *vm = vlib_get_main ();
1166 u16 alloc_bytes = sizeof (sctp_hb_ack_chunk_t);
1168 sctp_reuse_buffer (vm, b);
1170 /* As per RFC 4960 the chunk_length value does NOT contemplate
1171 * the size of the first header (see sctp_header_t) and any padding
1173 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
1175 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
1177 sctp_hb_ack_chunk_t *hb_ack = vlib_buffer_push_uninit (b, alloc_bytes);
1179 hb_ack->sctp_hdr.checksum = 0;
1180 /* No need of host_to_net conversion, already in net-byte order */
1181 hb_ack->sctp_hdr.src_port = sctp_conn->sub_conn[idx].connection.lcl_port;
1182 hb_ack->sctp_hdr.dst_port = sctp_conn->sub_conn[idx].connection.rmt_port;
1183 hb_ack->sctp_hdr.verification_tag = sctp_conn->remote_tag;
1184 hb_ack->hb_info.param_hdr.type = clib_host_to_net_u16 (1);
1185 hb_ack->hb_info.param_hdr.length =
1186 clib_host_to_net_u16 (sizeof (hb_ack->hb_info.hb_info));
1188 vnet_sctp_set_chunk_type (&hb_ack->chunk_hdr, HEARTBEAT_ACK);
1189 vnet_sctp_set_chunk_length (&hb_ack->chunk_hdr, chunk_len);
1191 vnet_buffer (b)->sctp.connection_index =
1192 sctp_conn->sub_conn[idx].connection.c_index;
1193 vnet_buffer (b)->sctp.subconn_idx = idx;
1197 * Convert buffer to HEARTBEAT
1200 sctp_prepare_heartbeat_chunk (sctp_connection_t * sctp_conn, u8 idx,
1203 u16 alloc_bytes = sizeof (sctp_hb_req_chunk_t);
1205 /* As per RFC 4960 the chunk_length value does NOT contemplate
1206 * the size of the first header (see sctp_header_t) and any padding
1208 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
1210 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
1212 sctp_hb_req_chunk_t *hb_req = vlib_buffer_push_uninit (b, alloc_bytes);
1214 hb_req->sctp_hdr.checksum = 0;
1215 /* No need of host_to_net conversion, already in net-byte order */
1216 hb_req->sctp_hdr.src_port = sctp_conn->sub_conn[idx].connection.lcl_port;
1217 hb_req->sctp_hdr.dst_port = sctp_conn->sub_conn[idx].connection.rmt_port;
1218 hb_req->sctp_hdr.verification_tag = sctp_conn->remote_tag;
1219 hb_req->hb_info.param_hdr.type = clib_host_to_net_u16 (1);
1220 hb_req->hb_info.param_hdr.length =
1221 clib_host_to_net_u16 (sizeof (hb_req->hb_info.hb_info));
1223 vnet_sctp_set_chunk_type (&hb_req->chunk_hdr, HEARTBEAT);
1224 vnet_sctp_set_chunk_length (&hb_req->chunk_hdr, chunk_len);
1226 vnet_buffer (b)->sctp.connection_index =
1227 sctp_conn->sub_conn[idx].connection.c_index;
1228 vnet_buffer (b)->sctp.subconn_idx = idx;
1232 sctp_send_heartbeat (sctp_connection_t * sctp_conn)
1236 sctp_main_t *tm = vnet_get_sctp_main ();
1237 vlib_main_t *vm = vlib_get_main ();
1240 u32 now = sctp_time_now ();
1242 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
1244 if (sctp_conn->sub_conn[i].state == SCTP_SUBCONN_STATE_DOWN)
1247 if (now > (sctp_conn->sub_conn[i].last_seen + SCTP_HB_INTERVAL))
1249 if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi)))
1252 b = vlib_get_buffer (vm, bi);
1253 sctp_init_buffer (vm, b);
1254 sctp_prepare_heartbeat_chunk (sctp_conn, i, b);
1256 sctp_enqueue_to_output_now (vm, b, bi,
1257 sctp_conn->sub_conn[i].
1260 sctp_conn->sub_conn[i].unacknowledged_hb += 1;
1266 * Convert buffer to SHUTDOWN_COMPLETE
1269 sctp_prepare_shutdown_complete_chunk (sctp_connection_t * sctp_conn, u8 idx,
1272 u16 alloc_bytes = sizeof (sctp_shutdown_association_chunk_t);
1273 alloc_bytes += vnet_sctp_calculate_padding (alloc_bytes);
1275 u16 chunk_len = alloc_bytes - sizeof (sctp_header_t);
1277 sctp_shutdown_complete_chunk_t *shutdown_complete =
1278 vlib_buffer_push_uninit (b, alloc_bytes);
1280 shutdown_complete->sctp_hdr.checksum = 0;
1281 /* No need of host_to_net conversion, already in net-byte order */
1282 shutdown_complete->sctp_hdr.src_port =
1283 sctp_conn->sub_conn[idx].connection.lcl_port;
1284 shutdown_complete->sctp_hdr.dst_port =
1285 sctp_conn->sub_conn[idx].connection.rmt_port;
1286 shutdown_complete->sctp_hdr.verification_tag = sctp_conn->remote_tag;
1288 vnet_sctp_set_chunk_type (&shutdown_complete->chunk_hdr, SHUTDOWN_COMPLETE);
1289 vnet_sctp_set_chunk_length (&shutdown_complete->chunk_hdr, chunk_len);
1291 vnet_buffer (b)->sctp.connection_index =
1292 sctp_conn->sub_conn[idx].connection.c_index;
1293 vnet_buffer (b)->sctp.subconn_idx = idx;
1297 sctp_send_shutdown_complete (sctp_connection_t * sctp_conn, u8 idx,
1300 vlib_main_t *vm = vlib_get_main ();
1302 if (sctp_check_outstanding_data_chunks (sctp_conn) > 0)
1305 sctp_reuse_buffer (vm, b0);
1307 sctp_prepare_shutdown_complete_chunk (sctp_conn, idx, b0);
1314 sctp_send_init (sctp_connection_t * sctp_conn)
1318 sctp_main_t *tm = vnet_get_sctp_main ();
1319 vlib_main_t *vm = vlib_get_main ();
1321 if (PREDICT_FALSE (sctp_conn->init_retransmit_err > SCTP_MAX_INIT_RETRANS))
1323 clib_warning ("Reached MAX_INIT_RETRANS times. Aborting connection.");
1325 session_stream_connect_notify (&sctp_conn->sub_conn
1326 [SCTP_PRIMARY_PATH_IDX].connection, 1);
1328 sctp_connection_timers_reset (sctp_conn);
1330 sctp_connection_cleanup (sctp_conn);
1335 if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi)))
1338 b = vlib_get_buffer (vm, bi);
1339 u8 idx = SCTP_PRIMARY_PATH_IDX;
1341 sctp_init_buffer (vm, b);
1342 sctp_prepare_init_chunk (sctp_conn, idx, b);
1344 sctp_push_ip_hdr (tm, &sctp_conn->sub_conn[idx], b);
1345 sctp_enqueue_to_ip_lookup (vm, b, bi, sctp_conn->sub_conn[idx].c_is_ip4,
1346 sctp_conn->sub_conn[idx].c_fib_index);
1348 /* Start the T1_INIT timer */
1349 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T1_INIT,
1350 sctp_conn->sub_conn[idx].RTO);
1352 /* Change state to COOKIE_WAIT */
1353 sctp_conn->state = SCTP_STATE_COOKIE_WAIT;
1355 /* Measure RTT with this */
1356 sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
1360 * Push SCTP header and update connection variables
1363 sctp_push_hdr_i (sctp_connection_t * sctp_conn, vlib_buffer_t * b,
1364 sctp_state_t next_state)
1367 b->current_length + b->total_length_not_including_first_buffer;
1368 ASSERT (!b->total_length_not_including_first_buffer
1369 || (b->flags & VLIB_BUFFER_NEXT_PRESENT));
1371 SCTP_ADV_DBG_OUTPUT ("b->current_length = %u, "
1372 "b->current_data = %p "
1374 b->current_length, b->current_data, data_len);
1376 u16 bytes_to_add = sizeof (sctp_payload_data_chunk_t);
1377 u16 chunk_length = data_len + bytes_to_add - sizeof (sctp_header_t);
1379 bytes_to_add += vnet_sctp_calculate_padding (bytes_to_add + data_len);
1381 sctp_payload_data_chunk_t *data_chunk =
1382 vlib_buffer_push_uninit (b, bytes_to_add);
1384 u8 idx = sctp_data_subconn_select (sctp_conn);
1386 ("SCTP_CONN = %p, IDX = %u, S_INDEX = %u, C_INDEX = %u, sctp_conn->[...].LCL_PORT = %u, sctp_conn->[...].RMT_PORT = %u",
1387 sctp_conn, idx, sctp_conn->sub_conn[idx].connection.s_index,
1388 sctp_conn->sub_conn[idx].connection.c_index,
1389 sctp_conn->sub_conn[idx].connection.lcl_port,
1390 sctp_conn->sub_conn[idx].connection.rmt_port);
1391 data_chunk->sctp_hdr.checksum = 0;
1392 data_chunk->sctp_hdr.src_port =
1393 sctp_conn->sub_conn[idx].connection.lcl_port;
1394 data_chunk->sctp_hdr.dst_port =
1395 sctp_conn->sub_conn[idx].connection.rmt_port;
1396 data_chunk->sctp_hdr.verification_tag = sctp_conn->remote_tag;
1398 data_chunk->tsn = clib_host_to_net_u32 (sctp_conn->next_tsn);
1399 data_chunk->stream_id = clib_host_to_net_u16 (0);
1400 data_chunk->stream_seq = clib_host_to_net_u16 (0);
1402 vnet_sctp_set_chunk_type (&data_chunk->chunk_hdr, DATA);
1403 vnet_sctp_set_chunk_length (&data_chunk->chunk_hdr, chunk_length);
1405 vnet_sctp_set_bbit (&data_chunk->chunk_hdr);
1406 vnet_sctp_set_ebit (&data_chunk->chunk_hdr);
1408 SCTP_ADV_DBG_OUTPUT ("POINTER_WITH_DATA = %p, DATA_OFFSET = %u",
1409 b->data, b->current_data);
1411 if (sctp_conn->sub_conn[idx].state != SCTP_SUBCONN_AWAITING_SACK)
1413 sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_AWAITING_SACK;
1414 sctp_conn->last_unacked_tsn = sctp_conn->next_tsn;
1417 sctp_conn->next_tsn += data_len;
1419 u32 inflight = sctp_conn->next_tsn - sctp_conn->last_unacked_tsn;
1420 /* Section 7.2.2; point (3) */
1421 if (sctp_conn->sub_conn[idx].partially_acked_bytes >=
1422 sctp_conn->sub_conn[idx].cwnd
1423 && inflight >= sctp_conn->sub_conn[idx].cwnd)
1425 sctp_conn->sub_conn[idx].cwnd += sctp_conn->sub_conn[idx].PMTU;
1426 sctp_conn->sub_conn[idx].partially_acked_bytes -=
1427 sctp_conn->sub_conn[idx].cwnd;
1430 sctp_conn->sub_conn[idx].last_data_ts = sctp_time_now ();
1432 vnet_buffer (b)->sctp.connection_index =
1433 sctp_conn->sub_conn[idx].connection.c_index;
1435 vnet_buffer (b)->sctp.subconn_idx = idx;
1439 sctp_push_header (transport_connection_t * trans_conn, vlib_buffer_t * b)
1441 sctp_connection_t *sctp_conn =
1442 sctp_get_connection_from_transport (trans_conn);
1444 SCTP_DBG_OUTPUT ("TRANS_CONN = %p, SCTP_CONN = %p, "
1445 "S_INDEX = %u, C_INDEX = %u,"
1446 "trans_conn->LCL_PORT = %u, trans_conn->RMT_PORT = %u",
1449 trans_conn->s_index,
1450 trans_conn->c_index,
1451 trans_conn->lcl_port, trans_conn->rmt_port);
1453 sctp_push_hdr_i (sctp_conn, b, SCTP_STATE_ESTABLISHED);
1455 sctp_trajectory_add_start (b, 3);
1461 sctp_prepare_data_retransmit (sctp_connection_t * sctp_conn,
1464 u32 max_deq_bytes, vlib_buffer_t ** b)
1466 sctp_main_t *tm = vnet_get_sctp_main ();
1467 vlib_main_t *vm = vlib_get_main ();
1469 u32 bi, available_bytes, seg_size;
1472 ASSERT (sctp_conn->state >= SCTP_STATE_ESTABLISHED);
1473 ASSERT (max_deq_bytes != 0);
1476 * Make sure we can retransmit something
1479 stream_session_tx_fifo_max_dequeue (&sctp_conn->sub_conn[idx].connection);
1480 ASSERT (available_bytes >= offset);
1481 available_bytes -= offset;
1482 if (!available_bytes)
1484 max_deq_bytes = clib_min (sctp_conn->sub_conn[idx].cwnd, max_deq_bytes);
1485 max_deq_bytes = clib_min (available_bytes, max_deq_bytes);
1487 seg_size = max_deq_bytes;
1490 * Allocate and fill in buffer(s)
1493 if (PREDICT_FALSE (sctp_get_free_buffer_index (tm, &bi)))
1495 *b = vlib_get_buffer (vm, bi);
1496 data = sctp_init_buffer (vm, *b);
1498 /* Easy case, buffer size greater than mss */
1499 if (PREDICT_TRUE (seg_size <= tm->bytes_per_buffer))
1502 stream_session_peek_bytes (&sctp_conn->sub_conn[idx].connection, data,
1503 offset, max_deq_bytes);
1504 ASSERT (n_bytes == max_deq_bytes);
1505 b[0]->current_length = n_bytes;
1506 sctp_push_hdr_i (sctp_conn, *b, sctp_conn->state);
1513 sctp_data_retransmit (sctp_connection_t * sctp_conn)
1515 vlib_main_t *vm = vlib_get_main ();
1516 vlib_buffer_t *b = 0;
1517 u32 bi, n_bytes = 0;
1520 ("SCTP_CONN = %p, IDX = %u, S_INDEX = %u, C_INDEX = %u, sctp_conn->[...].LCL_PORT = %u, sctp_conn->[...].RMT_PORT = %u",
1521 sctp_conn, idx, sctp_conn->sub_conn[idx].connection.s_index,
1522 sctp_conn->sub_conn[idx].connection.c_index,
1523 sctp_conn->sub_conn[idx].connection.lcl_port,
1524 sctp_conn->sub_conn[idx].connection.rmt_port);
1526 if (sctp_conn->state >= SCTP_STATE_ESTABLISHED)
1531 u8 idx = sctp_data_subconn_select (sctp_conn);
1534 sctp_prepare_data_retransmit (sctp_conn, idx, 0,
1535 sctp_conn->sub_conn[idx].cwnd, &b);
1537 SCTP_DBG_OUTPUT ("We have data (%u bytes) to retransmit", n_bytes);
1539 bi = vlib_get_buffer_index (vm, b);
1541 sctp_enqueue_to_output_now (vm, b, bi,
1542 sctp_conn->sub_conn[idx].connection.is_ip4);
1547 #if SCTP_DEBUG_STATE_MACHINE
1549 sctp_validate_output_state_machine (sctp_connection_t * sctp_conn,
1553 switch (sctp_conn->state)
1555 case SCTP_STATE_CLOSED:
1556 if (chunk_type != INIT && chunk_type != INIT_ACK)
1559 case SCTP_STATE_ESTABLISHED:
1560 if (chunk_type != DATA && chunk_type != HEARTBEAT &&
1561 chunk_type != HEARTBEAT_ACK && chunk_type != SACK &&
1562 chunk_type != COOKIE_ACK && chunk_type != SHUTDOWN)
1565 case SCTP_STATE_COOKIE_WAIT:
1566 if (chunk_type != COOKIE_ECHO)
1569 case SCTP_STATE_SHUTDOWN_SENT:
1570 if (chunk_type != SHUTDOWN_COMPLETE)
1573 case SCTP_STATE_SHUTDOWN_RECEIVED:
1574 if (chunk_type != SHUTDOWN_ACK)
1583 sctp_is_retransmitting (sctp_connection_t * sctp_conn, u8 idx)
1585 return sctp_conn->sub_conn[idx].is_retransmitting;
1589 sctp46_output_inline (vlib_main_t * vm,
1590 vlib_node_runtime_t * node,
1591 vlib_frame_t * from_frame, int is_ip4)
1593 u32 n_left_from, next_index, *from, *to_next;
1594 u32 my_thread_index = vm->thread_index;
1596 from = vlib_frame_vector_args (from_frame);
1597 n_left_from = from_frame->n_vectors;
1598 next_index = node->cached_next_index;
1599 sctp_set_time_now (my_thread_index);
1601 while (n_left_from > 0)
1605 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1607 while (n_left_from > 0 && n_left_to_next > 0)
1611 sctp_header_t *sctp_hdr = 0;
1612 sctp_connection_t *sctp_conn;
1613 sctp_tx_trace_t *t0;
1614 sctp_header_t *th0 = 0;
1615 u32 error0 = SCTP_ERROR_PKTS_SENT, next0 =
1616 SCTP_OUTPUT_NEXT_IP_LOOKUP;
1618 #if SCTP_DEBUG_STATE_MACHINE
1619 u16 packet_length = 0;
1627 n_left_to_next -= 1;
1629 b0 = vlib_get_buffer (vm, bi0);
1632 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1635 if (PREDICT_FALSE (sctp_conn == 0))
1637 error0 = SCTP_ERROR_INVALID_CONNECTION;
1638 next0 = SCTP_OUTPUT_NEXT_DROP;
1642 u8 idx = vnet_buffer (b0)->sctp.subconn_idx;
1644 th0 = vlib_buffer_get_current (b0);
1648 ip4_header_t *iph4 = vlib_buffer_push_ip4 (vm,
1650 &sctp_conn->sub_conn
1657 IP_PROTOCOL_SCTP, 1);
1659 u32 checksum = ip4_sctp_compute_checksum (vm, b0, iph4);
1661 sctp_hdr = ip4_next_header (iph4);
1662 sctp_hdr->checksum = checksum;
1664 vnet_buffer (b0)->l4_hdr_offset = (u8 *) th0 - b0->data;
1666 #if SCTP_DEBUG_STATE_MACHINE
1667 packet_length = clib_net_to_host_u16 (iph4->length);
1672 ip6_header_t *iph6 = vlib_buffer_push_ip6 (vm,
1674 &sctp_conn->sub_conn
1678 &sctp_conn->sub_conn
1685 u32 checksum = ip6_sctp_compute_checksum (vm, b0, iph6, &bogus);
1688 sctp_hdr = ip6_next_header (iph6);
1689 sctp_hdr->checksum = checksum;
1691 vnet_buffer (b0)->l3_hdr_offset = (u8 *) iph6 - b0->data;
1692 vnet_buffer (b0)->l4_hdr_offset = (u8 *) th0 - b0->data;
1694 #if SCTP_DEBUG_STATE_MACHINE
1695 packet_length = clib_net_to_host_u16 (iph6->payload_length);
1699 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1700 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
1701 if (chunk_type >= UNKNOWN)
1704 ("Trying to send an unrecognized chunk... something is really bad.");
1705 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1706 next0 = SCTP_OUTPUT_NEXT_DROP;
1710 #if SCTP_DEBUG_STATE_MACHINE
1712 (sctp_conn->sub_conn[idx].connection.lcl_port ==
1714 || sctp_conn->sub_conn[idx].connection.lcl_port ==
1716 && (sctp_conn->sub_conn[idx].connection.rmt_port ==
1718 || sctp_conn->sub_conn[idx].connection.rmt_port ==
1719 sctp_hdr->src_port);
1723 SCTP_DBG_STATE_MACHINE ("BUFFER IS INCORRECT: conn_index = %u, "
1724 "packet_length = %u, "
1725 "chunk_type = %u [%s], "
1726 "connection.lcl_port = %u, sctp_hdr->src_port = %u, "
1727 "connection.rmt_port = %u, sctp_hdr->dst_port = %u",
1728 sctp_conn->sub_conn[idx].
1729 connection.c_index, packet_length,
1731 sctp_chunk_to_string (chunk_type),
1732 sctp_conn->sub_conn[idx].
1733 connection.lcl_port, sctp_hdr->src_port,
1734 sctp_conn->sub_conn[idx].
1735 connection.rmt_port,
1736 sctp_hdr->dst_port);
1738 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1739 next0 = SCTP_OUTPUT_NEXT_DROP;
1743 SCTP_DBG_STATE_MACHINE
1744 ("SESSION_INDEX = %u, CONN_INDEX = %u, CURR_CONN_STATE = %u (%s), "
1745 "CHUNK_TYPE = %s, " "SRC_PORT = %u, DST_PORT = %u",
1746 sctp_conn->sub_conn[idx].connection.s_index,
1747 sctp_conn->sub_conn[idx].connection.c_index,
1748 sctp_conn->state, sctp_state_to_string (sctp_conn->state),
1749 sctp_chunk_to_string (chunk_type), full_hdr->hdr.src_port,
1750 full_hdr->hdr.dst_port);
1752 /* Let's make sure the state-machine does not send anything crazy */
1753 #if SCTP_DEBUG_STATE_MACHINE
1754 if (sctp_validate_output_state_machine (sctp_conn, chunk_type) != 0)
1756 SCTP_DBG_STATE_MACHINE
1757 ("Sending the wrong chunk (%s) based on state-machine status (%s)",
1758 sctp_chunk_to_string (chunk_type),
1759 sctp_state_to_string (sctp_conn->state));
1761 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1762 next0 = SCTP_OUTPUT_NEXT_DROP;
1768 /* Karn's algorithm: RTT measurements MUST NOT be made using
1769 * packets that were retransmitted
1771 if (!sctp_is_retransmitting (sctp_conn, idx))
1773 /* Measure RTT with this */
1774 if (chunk_type == DATA
1775 && sctp_conn->sub_conn[idx].RTO_pending == 0)
1777 sctp_conn->sub_conn[idx].RTO_pending = 1;
1778 sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
1781 sctp_conn->sub_conn[idx].rtt_ts = sctp_time_now ();
1784 /* Let's take care of TIMERS */
1789 sctp_conn->state = SCTP_STATE_COOKIE_ECHOED;
1794 SCTP_ADV_DBG_OUTPUT ("PACKET_LENGTH = %u", packet_length);
1796 sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T3_RXTX,
1797 sctp_conn->sub_conn[idx].RTO);
1802 /* Start the SCTP_TIMER_T2_SHUTDOWN timer */
1803 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T2_SHUTDOWN,
1804 sctp_conn->sub_conn[idx].RTO);
1805 sctp_conn->state = SCTP_STATE_SHUTDOWN_SENT;
1810 /* Start the SCTP_TIMER_T2_SHUTDOWN timer */
1811 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T2_SHUTDOWN,
1812 sctp_conn->sub_conn[idx].RTO);
1813 sctp_conn->state = SCTP_STATE_SHUTDOWN_ACK_SENT;
1816 case SHUTDOWN_COMPLETE:
1818 sctp_conn->state = SCTP_STATE_CLOSED;
1823 vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
1824 vnet_buffer (b0)->sw_if_index[VLIB_TX] =
1825 sctp_conn->sub_conn[idx].c_fib_index;
1827 b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
1829 SCTP_DBG_STATE_MACHINE
1830 ("SESSION_INDEX = %u, CONNECTION_INDEX = %u, " "NEW_STATE = %s, "
1831 "CHUNK_SENT = %s", sctp_conn->sub_conn[idx].connection.s_index,
1832 sctp_conn->sub_conn[idx].connection.c_index,
1833 sctp_state_to_string (sctp_conn->state),
1834 sctp_chunk_to_string (chunk_type));
1836 vnet_sctp_common_hdr_params_host_to_net (&full_hdr->common_hdr);
1839 b0->error = node->errors[error0];
1840 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1842 t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
1845 clib_memcpy (&t0->sctp_header, th0,
1846 sizeof (t0->sctp_header));
1850 memset (&t0->sctp_header, 0, sizeof (t0->sctp_header));
1852 clib_memcpy (&t0->sctp_connection, sctp_conn,
1853 sizeof (t0->sctp_connection));
1856 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1857 n_left_to_next, bi0, next0);
1860 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1863 return from_frame->n_vectors;
1867 sctp4_output (vlib_main_t * vm, vlib_node_runtime_t * node,
1868 vlib_frame_t * from_frame)
1870 return sctp46_output_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1874 sctp6_output (vlib_main_t * vm, vlib_node_runtime_t * node,
1875 vlib_frame_t * from_frame)
1877 return sctp46_output_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1881 VLIB_REGISTER_NODE (sctp4_output_node) =
1883 .function = sctp4_output,.name = "sctp4-output",
1884 /* Takes a vector of packets. */
1885 .vector_size = sizeof (u32),
1886 .n_errors = SCTP_N_ERROR,
1887 .error_strings = sctp_error_strings,
1888 .n_next_nodes = SCTP_OUTPUT_N_NEXT,
1890 #define _(s,n) [SCTP_OUTPUT_NEXT_##s] = n,
1891 foreach_sctp4_output_next
1894 .format_buffer = format_sctp_header,
1895 .format_trace = format_sctp_tx_trace,
1899 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_output_node, sctp4_output);
1902 VLIB_REGISTER_NODE (sctp6_output_node) =
1904 .function = sctp6_output,
1905 .name = "sctp6-output",
1906 /* Takes a vector of packets. */
1907 .vector_size = sizeof (u32),
1908 .n_errors = SCTP_N_ERROR,
1909 .error_strings = sctp_error_strings,
1910 .n_next_nodes = SCTP_OUTPUT_N_NEXT,
1912 #define _(s,n) [SCTP_OUTPUT_NEXT_##s] = n,
1913 foreach_sctp6_output_next
1916 .format_buffer = format_sctp_header,
1917 .format_trace = format_sctp_tx_trace,
1921 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_output_node, sctp6_output);
1924 * fd.io coding-style-patch-verification: ON
1927 * eval: (c-set-style "gnu")