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 <vppinfra/sparse_vec.h>
16 #include <vnet/sctp/sctp.h>
17 #include <vnet/sctp/sctp_packet.h>
18 #include <vnet/sctp/sctp_debug.h>
19 #include <vnet/session/session.h>
22 static char *sctp_error_strings[] = {
23 #define sctp_error(n,s) s,
24 #include <vnet/sctp/sctp_error.def>
28 /* All SCTP nodes have the same outgoing arcs */
29 #define foreach_sctp_state_next \
30 _ (DROP, "error-drop") \
31 _ (SCTP4_OUTPUT, "sctp4-output") \
32 _ (SCTP6_OUTPUT, "sctp6-output")
34 typedef enum _sctp_established_phase_next
36 #define _(s,n) SCTP_ESTABLISHED_PHASE_NEXT_##s,
37 foreach_sctp_state_next
39 SCTP_ESTABLISHED_PHASE_N_NEXT,
40 } sctp_established_phase_next_t;
42 typedef enum _sctp_rcv_phase_next
44 #define _(s,n) SCTP_RCV_PHASE_NEXT_##s,
45 foreach_sctp_state_next
47 SCTP_RCV_PHASE_N_NEXT,
48 } sctp_rcv_phase_next_t;
50 typedef enum _sctp_listen_phase_next
52 #define _(s,n) SCTP_LISTEN_PHASE_NEXT_##s,
53 foreach_sctp_state_next
55 SCTP_LISTEN_PHASE_N_NEXT,
56 } sctp_listen_phase_next_t;
58 typedef enum _sctp_shutdown_phase_next
60 #define _(s,n) SCTP_SHUTDOWN_PHASE_NEXT_##s,
61 foreach_sctp_state_next
63 SCTP_SHUTDOWN_PHASE_N_NEXT,
64 } sctp_shutdown_phase_next_t;
66 /* Generic, state independent indices */
67 typedef enum _sctp_state_next
69 #define _(s,n) SCTP_NEXT_##s,
70 foreach_sctp_state_next
75 typedef enum _sctp_input_next
78 SCTP_INPUT_NEXT_LISTEN_PHASE,
79 SCTP_INPUT_NEXT_RCV_PHASE,
80 SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
81 SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
82 SCTP_INPUT_NEXT_PUNT_PHASE,
87 phase_to_string (u8 phase)
91 case SCTP_INPUT_NEXT_DROP:
92 return "SCTP_INPUT_NEXT_DROP";
93 case SCTP_INPUT_NEXT_LISTEN_PHASE:
94 return "SCTP_INPUT_NEXT_LISTEN_PHASE";
95 case SCTP_INPUT_NEXT_RCV_PHASE:
96 return "SCTP_INPUT_NEXT_RCV_PHASE";
97 case SCTP_INPUT_NEXT_ESTABLISHED_PHASE:
98 return "SCTP_INPUT_NEXT_ESTABLISHED_PHASE";
99 case SCTP_INPUT_NEXT_SHUTDOWN_PHASE:
100 return "SCTP_INPUT_NEXT_SHUTDOWN_PHASE";
101 case SCTP_INPUT_NEXT_PUNT_PHASE:
102 return "SCTP_INPUT_NEXT_PUNT_PHASE";
107 #define foreach_sctp4_input_next \
108 _ (DROP, "error-drop") \
109 _ (RCV_PHASE, "sctp4-rcv") \
110 _ (LISTEN_PHASE, "sctp4-listen") \
111 _ (ESTABLISHED_PHASE, "sctp4-established") \
112 _ (SHUTDOWN_PHASE, "sctp4-shutdown") \
113 _ (PUNT_PHASE, "ip4-punt")
116 #define foreach_sctp6_input_next \
117 _ (DROP, "error-drop") \
118 _ (RCV_PHASE, "sctp6-rcv") \
119 _ (LISTEN_PHASE, "sctp6-listen") \
120 _ (ESTABLISHED_PHASE, "sctp6-established") \
121 _ (SHUTDOWN_PHASE, "sctp6-shutdown") \
122 _ (PUNT_PHASE, "ip6-punt")
125 sctp_lookup_is_valid (transport_connection_t * trans_conn,
126 sctp_header_t * sctp_hdr)
128 sctp_connection_t *sctp_conn =
129 sctp_get_connection_from_transport (trans_conn);
134 u8 is_valid = (trans_conn->lcl_port == sctp_hdr->dst_port
135 && (sctp_conn->state == SCTP_STATE_CLOSED
136 || trans_conn->rmt_port == sctp_hdr->src_port));
142 * Lookup transport connection
144 static sctp_connection_t *
145 sctp_lookup_connection (u32 fib_index, vlib_buffer_t * b, u8 thread_index,
148 sctp_main_t *tm = vnet_get_sctp_main ();
149 sctp_header_t *sctp_hdr;
150 transport_connection_t *trans_conn;
151 sctp_connection_t *sctp_conn;
155 ip4_header_t *ip4_hdr;
156 ip4_hdr = vlib_buffer_get_current (b);
157 sctp_hdr = ip4_next_header (ip4_hdr);
158 trans_conn = session_lookup_connection_wt4 (fib_index,
159 &ip4_hdr->dst_address,
160 &ip4_hdr->src_address,
163 TRANSPORT_PROTO_SCTP,
164 thread_index, &is_filtered);
165 if (trans_conn == 0) /* Not primary connection */
167 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
169 if ((tm->connections[thread_index]->sub_conn[i].
170 connection.lcl_ip.ip4.as_u32 ==
171 ip4_hdr->dst_address.as_u32)
172 && (tm->connections[thread_index]->sub_conn[i].
173 connection.rmt_ip.ip4.as_u32 ==
174 ip4_hdr->src_address.as_u32))
177 &tm->connections[thread_index]->sub_conn[i].connection;
182 ASSERT (trans_conn != 0);
183 ASSERT (sctp_lookup_is_valid (trans_conn, sctp_hdr));
187 ip6_header_t *ip6_hdr;
188 ip6_hdr = vlib_buffer_get_current (b);
189 sctp_hdr = ip6_next_header (ip6_hdr);
190 trans_conn = session_lookup_connection_wt6 (fib_index,
191 &ip6_hdr->dst_address,
192 &ip6_hdr->src_address,
195 TRANSPORT_PROTO_SCTP,
196 thread_index, &is_filtered);
197 if (trans_conn == 0) /* Not primary connection */
199 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
201 if ((tm->connections[thread_index]->sub_conn[i].
202 connection.lcl_ip.ip6.as_u64[0] ==
203 ip6_hdr->dst_address.as_u64[0]
204 && tm->connections[thread_index]->sub_conn[i].
205 connection.lcl_ip.ip6.as_u64[1] ==
206 ip6_hdr->dst_address.as_u64[1])
207 && (tm->connections[thread_index]->sub_conn[i].
208 connection.rmt_ip.ip6.as_u64[0] ==
209 ip6_hdr->src_address.as_u64[0]
210 && tm->connections[thread_index]->
211 sub_conn[i].connection.rmt_ip.ip6.as_u64[1] ==
212 ip6_hdr->src_address.as_u64[1]))
215 &tm->connections[thread_index]->sub_conn[i].connection;
220 ASSERT (trans_conn != 0);
221 ASSERT (sctp_lookup_is_valid (trans_conn, sctp_hdr));
223 sctp_conn = sctp_get_connection_from_transport (trans_conn);
229 sctp_header_t sctp_header;
230 sctp_connection_t sctp_connection;
233 #define sctp_next_output(is_ip4) (is_ip4 ? SCTP_NEXT_SCTP4_OUTPUT \
234 : SCTP_NEXT_SCTP6_OUTPUT)
238 sctp_set_rx_trace_data (sctp_rx_trace_t * rx_trace,
239 sctp_connection_t * sctp_conn,
240 sctp_header_t * sctp_hdr, vlib_buffer_t * b0,
245 clib_memcpy (&rx_trace->sctp_connection, sctp_conn,
246 sizeof (rx_trace->sctp_connection));
250 sctp_hdr = sctp_buffer_hdr (b0);
252 clib_memcpy (&rx_trace->sctp_header, sctp_hdr,
253 sizeof (rx_trace->sctp_header));
257 sctp_calculate_implied_length (ip4_header_t * ip4_hdr, ip6_header_t * ip6_hdr,
260 u16 sctp_implied_packet_length = 0;
263 sctp_implied_packet_length =
264 clib_net_to_host_u16 (ip4_hdr->length) - ip4_header_bytes (ip4_hdr);
266 sctp_implied_packet_length =
267 clib_net_to_host_u16 (ip6_hdr->payload_length) - sizeof (ip6_hdr);
269 return sctp_implied_packet_length;
273 sctp_is_bundling (u16 sctp_implied_length,
274 sctp_chunks_common_hdr_t * sctp_common_hdr)
276 if (sctp_implied_length !=
277 sizeof (sctp_header_t) + vnet_sctp_get_chunk_length (sctp_common_hdr))
283 sctp_handle_init (sctp_header_t * sctp_hdr,
284 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
285 sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
286 u16 sctp_implied_length)
288 sctp_init_chunk_t *init_chunk = (sctp_init_chunk_t *) (sctp_hdr);
289 ip4_address_t *ip4_addr = 0;
290 ip6_address_t *ip6_addr = 0;
291 char hostname[FQDN_MAX_LENGTH];
293 /* Check the current state of the connection
295 * The logic required by the RFC4960 Section 5.2.2 is already taken care of
296 * in the code below and by the "sctp_prepare_initack_chunk" function.
297 * However, for debugging purposes it is nice to have a message printed out
298 * for these corner-case scenarios.
300 if (sctp_conn->state != SCTP_STATE_CLOSED)
301 { /* UNEXPECTED scenario */
302 switch (sctp_conn->state)
304 case SCTP_STATE_COOKIE_WAIT: /* TODO */
305 SCTP_ADV_DBG ("Received INIT chunk while in COOKIE_WAIT state");
307 case SCTP_STATE_COOKIE_ECHOED: /* TODO */
308 SCTP_ADV_DBG ("Received INIT chunk while in COOKIE_ECHOED state");
313 if (sctp_hdr->verification_tag != 0x0)
314 return SCTP_ERROR_INVALID_TAG_FOR_INIT;
317 * It is not possible to bundle any other CHUNK with the INIT chunk
319 if (sctp_is_bundling (sctp_implied_length, &init_chunk->chunk_hdr))
320 return SCTP_ERROR_BUNDLING_VIOLATION;
322 /* Save the INITIATE_TAG of the remote peer for this connection:
323 * it MUST be used for the VERIFICATION_TAG parameter in the SCTP HEADER */
324 sctp_conn->remote_tag = init_chunk->initiate_tag;
325 sctp_conn->remote_initial_tsn =
326 clib_net_to_host_u32 (init_chunk->initial_tsn);
327 sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn;
328 sctp_conn->next_tsn_expected = sctp_conn->remote_initial_tsn + 1;
329 SCTP_CONN_TRACKING_DBG ("sctp_conn->remote_initial_tsn = %u",
330 sctp_conn->remote_initial_tsn);
332 sctp_conn->snd_opts.a_rwnd = clib_net_to_host_u32 (init_chunk->a_rwnd);
335 * If the length specified in the INIT message is bigger than the size in bytes of our structure it means that
336 * optional parameters have been sent with the INIT chunk and we need to parse them.
338 u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr);
339 if (length > sizeof (sctp_init_chunk_t))
341 /* There are optional parameters in the INIT chunk */
342 u16 pointer_offset = sizeof (sctp_init_chunk_t);
343 while (pointer_offset < length)
345 sctp_opt_params_hdr_t *opt_params_hdr =
346 (sctp_opt_params_hdr_t *) init_chunk + pointer_offset;
348 switch (clib_net_to_host_u16 (opt_params_hdr->type))
350 case SCTP_IPV4_ADDRESS_TYPE:
352 sctp_ipv4_addr_param_t *ipv4 =
353 (sctp_ipv4_addr_param_t *) opt_params_hdr;
354 clib_memcpy (ip4_addr, &ipv4->address,
355 sizeof (ip4_address_t));
357 sctp_sub_connection_add_ip4 (vlib_get_thread_index (), ipv4);
361 case SCTP_IPV6_ADDRESS_TYPE:
363 sctp_ipv6_addr_param_t *ipv6 =
364 (sctp_ipv6_addr_param_t *) opt_params_hdr;
365 clib_memcpy (ip6_addr, &ipv6->address,
366 sizeof (ip6_address_t));
368 sctp_sub_connection_add_ip6 (vlib_get_thread_index (), ipv6);
372 case SCTP_COOKIE_PRESERVATIVE_TYPE:
374 sctp_cookie_preservative_param_t *cookie_pres =
375 (sctp_cookie_preservative_param_t *) opt_params_hdr;
376 sctp_conn->peer_cookie_life_span_increment =
377 cookie_pres->life_span_inc;
380 case SCTP_HOSTNAME_ADDRESS_TYPE:
382 sctp_hostname_param_t *hostname_addr =
383 (sctp_hostname_param_t *) opt_params_hdr;
384 clib_memcpy (hostname, hostname_addr->hostname,
388 case SCTP_SUPPORTED_ADDRESS_TYPES:
394 pointer_offset += clib_net_to_host_u16 (opt_params_hdr->length);
398 /* Reuse buffer to make init-ack and send */
399 sctp_prepare_initack_chunk (sctp_conn, b0, ip4_addr, ip6_addr);
400 return SCTP_ERROR_NONE;
404 sctp_is_valid_init_ack (sctp_header_t * sctp_hdr,
405 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
406 sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
407 u16 sctp_implied_length)
409 sctp_init_ack_chunk_t *init_ack_chunk =
410 (sctp_init_ack_chunk_t *) (sctp_hdr);
412 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
413 if (sctp_conn->local_tag != init_ack_chunk->sctp_hdr.verification_tag)
415 return SCTP_ERROR_INVALID_TAG;
419 * It is not possible to bundle any other CHUNK with the INIT_ACK chunk
421 if (sctp_is_bundling (sctp_implied_length, &init_ack_chunk->chunk_hdr))
422 return SCTP_ERROR_BUNDLING_VIOLATION;
424 return SCTP_ERROR_NONE;
428 sctp_handle_init_ack (sctp_header_t * sctp_hdr,
429 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
430 sctp_connection_t * sctp_conn, u8 idx,
431 vlib_buffer_t * b0, u16 sctp_implied_length)
433 sctp_init_ack_chunk_t *init_ack_chunk =
434 (sctp_init_ack_chunk_t *) (sctp_hdr);
435 ip4_address_t *ip4_addr = 0;
436 ip6_address_t *ip6_addr = 0;
437 sctp_state_cookie_param_t state_cookie;
439 char hostname[FQDN_MAX_LENGTH];
441 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
442 if (sctp_conn->local_tag != init_ack_chunk->sctp_hdr.verification_tag)
444 return SCTP_ERROR_INVALID_TAG;
448 * It is not possible to bundle any other CHUNK with the INIT chunk
450 if (sctp_is_bundling (sctp_implied_length, &init_ack_chunk->chunk_hdr))
451 return SCTP_ERROR_BUNDLING_VIOLATION;
453 sctp_calculate_rto (sctp_conn, idx);
455 /* remote_tag to be placed in the VERIFICATION_TAG field of the COOKIE_ECHO chunk */
456 sctp_conn->remote_tag = init_ack_chunk->initiate_tag;
457 sctp_conn->remote_initial_tsn =
458 clib_net_to_host_u32 (init_ack_chunk->initial_tsn);
459 sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn;
460 sctp_conn->next_tsn_expected = sctp_conn->remote_initial_tsn + 1;
461 SCTP_CONN_TRACKING_DBG ("sctp_conn->remote_initial_tsn = %u",
462 sctp_conn->remote_initial_tsn);
463 sctp_conn->snd_opts.a_rwnd = clib_net_to_host_u32 (init_ack_chunk->a_rwnd);
465 u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr);
467 if (length > sizeof (sctp_init_ack_chunk_t))
469 * There are optional parameters in the INIT ACK chunk
472 u16 pointer_offset = sizeof (sctp_init_ack_chunk_t);
474 while (pointer_offset < length)
476 sctp_opt_params_hdr_t *opt_params_hdr =
477 (sctp_opt_params_hdr_t *) ((char *) init_ack_chunk +
480 switch (clib_net_to_host_u16 (opt_params_hdr->type))
482 case SCTP_IPV4_ADDRESS_TYPE:
484 sctp_ipv4_addr_param_t *ipv4 =
485 (sctp_ipv4_addr_param_t *) opt_params_hdr;
486 clib_memcpy (ip4_addr, &ipv4->address,
487 sizeof (ip4_address_t));
489 sctp_sub_connection_add_ip4 (vlib_get_thread_index (), ipv4);
493 case SCTP_IPV6_ADDRESS_TYPE:
495 sctp_ipv6_addr_param_t *ipv6 =
496 (sctp_ipv6_addr_param_t *) opt_params_hdr;
497 clib_memcpy (ip6_addr, &ipv6->address,
498 sizeof (ip6_address_t));
500 sctp_sub_connection_add_ip6 (vlib_get_thread_index (), ipv6);
504 case SCTP_STATE_COOKIE_TYPE:
506 sctp_state_cookie_param_t *state_cookie_param =
507 (sctp_state_cookie_param_t *) opt_params_hdr;
509 clib_memcpy (&state_cookie, state_cookie_param,
510 sizeof (sctp_state_cookie_param_t));
513 case SCTP_HOSTNAME_ADDRESS_TYPE:
515 sctp_hostname_param_t *hostname_addr =
516 (sctp_hostname_param_t *) opt_params_hdr;
517 clib_memcpy (hostname, hostname_addr->hostname,
521 case SCTP_UNRECOGNIZED_TYPE:
526 u16 increment = clib_net_to_host_u16 (opt_params_hdr->length);
527 /* This indicates something really bad happened */
530 return SCTP_ERROR_INVALID_TAG;
532 pointer_offset += increment;
536 sctp_prepare_cookie_echo_chunk (sctp_conn, b0, &state_cookie);
538 /* Start the T1_COOKIE timer */
539 sctp_timer_set (sctp_conn, sctp_pick_conn_idx_on_chunk (COOKIE_ECHO),
540 SCTP_TIMER_T1_COOKIE, sctp_conn->sub_conn[idx].RTO);
542 return SCTP_ERROR_NONE;
545 /** Enqueue data out-of-order for delivery to application */
547 sctp_session_enqueue_data_ooo (sctp_connection_t * sctp_conn,
548 vlib_buffer_t * b, u16 data_len, u8 conn_idx)
550 int written, error = SCTP_ERROR_ENQUEUED;
553 session_enqueue_stream_connection (&sctp_conn->
554 sub_conn[conn_idx].connection, b, 0,
555 1 /* queue event */ ,
558 /* Update next_tsn_expected */
559 if (PREDICT_TRUE (written == data_len))
561 sctp_conn->next_tsn_expected += written;
563 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
564 sctp_conn->sub_conn[conn_idx].connection.c_index,
567 /* If more data written than expected, account for out-of-order bytes. */
568 else if (written > data_len)
570 sctp_conn->next_tsn_expected += written;
572 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
573 sctp_conn->sub_conn[conn_idx].connection.c_index,
576 else if (written > 0)
578 /* We've written something but FIFO is probably full now */
579 sctp_conn->next_tsn_expected += written;
581 error = SCTP_ERROR_PARTIALLY_ENQUEUED;
584 ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
585 sctp_conn->sub_conn[conn_idx].connection.c_index, written);
589 SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
590 sctp_conn->sub_conn[conn_idx].connection.c_index);
592 return SCTP_ERROR_FIFO_FULL;
595 /* TODO: Update out_of_order_map & SACK list */
600 /** Enqueue data for delivery to application */
602 sctp_session_enqueue_data (sctp_connection_t * sctp_conn, vlib_buffer_t * b,
603 u16 data_len, u8 conn_idx)
605 int written, error = SCTP_ERROR_ENQUEUED;
608 session_enqueue_stream_connection (&sctp_conn->
609 sub_conn[conn_idx].connection, b, 0,
610 1 /* queue event */ ,
613 /* Update next_tsn_expected */
614 if (PREDICT_TRUE (written == data_len))
616 sctp_conn->next_tsn_expected += written;
618 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
619 sctp_conn->sub_conn[conn_idx].connection.c_index,
622 /* If more data written than expected, account for out-of-order bytes. */
623 else if (written > data_len)
625 sctp_conn->next_tsn_expected += written;
627 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
628 sctp_conn->sub_conn[conn_idx].connection.c_index,
631 else if (written > 0)
633 /* We've written something but FIFO is probably full now */
634 sctp_conn->next_tsn_expected += written;
636 error = SCTP_ERROR_PARTIALLY_ENQUEUED;
639 ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
640 sctp_conn->sub_conn[conn_idx].connection.c_index, written);
644 SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
645 sctp_conn->sub_conn[conn_idx].connection.c_index);
647 return SCTP_ERROR_FIFO_FULL;
654 sctp_is_sack_delayable (sctp_connection_t * sctp_conn, u8 gapping)
658 SCTP_CONN_TRACKING_DBG
659 ("gapping != 0: CONN_INDEX = %u, sctp_conn->ack_state = %u",
660 sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
664 if (sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS)
666 SCTP_CONN_TRACKING_DBG
667 ("sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS: CONN_INDEX = %u, sctp_conn->ack_state = %u",
668 sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
672 sctp_conn->ack_state += 1;
678 sctp_is_connection_gapping (sctp_connection_t * sctp_conn, u32 tsn,
681 if (sctp_conn->next_tsn_expected != tsn) // It means data transmission is GAPPING
683 SCTP_CONN_TRACKING_DBG
684 ("GAPPING: CONN_INDEX = %u, sctp_conn->next_tsn_expected = %u, tsn = %u, diff = %u",
685 sctp_conn->sub_conn[idx].connection.c_index,
686 sctp_conn->next_tsn_expected, tsn,
687 sctp_conn->next_tsn_expected - tsn);
694 sctp_handle_data (sctp_payload_data_chunk_t * sctp_data_chunk,
695 sctp_connection_t * sctp_conn, vlib_buffer_t * b,
698 u32 error = 0, n_data_bytes;
699 u8 idx = sctp_pick_conn_idx_on_state (sctp_conn->state);
702 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
703 if (sctp_conn->local_tag != sctp_data_chunk->sctp_hdr.verification_tag)
705 return SCTP_ERROR_INVALID_TAG;
708 vnet_buffer (b)->sctp.sid = sctp_data_chunk->stream_id;
709 vnet_buffer (b)->sctp.ssn = sctp_data_chunk->stream_seq;
711 u32 tsn = clib_net_to_host_u32 (sctp_data_chunk->tsn);
713 vlib_buffer_advance (b, vnet_buffer (b)->sctp.data_offset);
714 n_data_bytes = vnet_buffer (b)->sctp.data_len;
715 ASSERT (n_data_bytes);
717 sctp_is_connection_gapping (sctp_conn, tsn, &is_gapping);
719 sctp_conn->last_rcvd_tsn = tsn;
721 SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
723 u8 bbit = vnet_sctp_get_bbit (&sctp_data_chunk->chunk_hdr);
724 u8 ebit = vnet_sctp_get_ebit (&sctp_data_chunk->chunk_hdr);
726 if (bbit == 1 && ebit == 1) /* Unfragmented message */
728 /* In order data, enqueue. Fifo figures out by itself if any out-of-order
729 * segments can be enqueued after fifo tail offset changes. */
730 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
732 else if (bbit == 1 && ebit == 0) /* First piece of a fragmented user message */
734 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
736 else if (bbit == 0 && ebit == 1) /* Last piece of a fragmented user message */
738 if (PREDICT_FALSE (is_gapping == 1))
740 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
742 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
744 else /* Middle piece of a fragmented user message */
746 if (PREDICT_FALSE (is_gapping == 1))
748 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
750 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
752 sctp_conn->last_rcvd_tsn = tsn;
754 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
756 SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
758 if (sctp_is_sack_delayable (sctp_conn, is_gapping) != 0)
759 sctp_prepare_sack_chunk (sctp_conn, b);
765 sctp_handle_cookie_echo (sctp_header_t * sctp_hdr,
766 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
767 sctp_connection_t * sctp_conn, vlib_buffer_t * b0)
769 u32 now = sctp_time_now ();
772 u8 idx = sctp_pick_conn_idx_on_chunk (COOKIE_ECHO);
774 sctp_cookie_echo_chunk_t *cookie_echo =
775 (sctp_cookie_echo_chunk_t *) sctp_hdr;
777 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
778 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
780 return SCTP_ERROR_INVALID_TAG;
783 sctp_calculate_rto (sctp_conn, idx);
786 clib_net_to_host_u32 (cookie_echo->cookie.creation_time);
787 u32 cookie_lifespan =
788 clib_net_to_host_u32 (cookie_echo->cookie.cookie_lifespan);
789 if (now > creation_time + cookie_lifespan)
791 SCTP_DBG ("now (%u) > creation_time (%u) + cookie_lifespan (%u)",
792 now, creation_time, cookie_lifespan);
793 return SCTP_ERROR_COOKIE_ECHO_VIOLATION;
796 sctp_prepare_cookie_ack_chunk (sctp_conn, b0);
799 sctp_conn->state = SCTP_STATE_ESTABLISHED;
801 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
802 sctp_conn->sub_conn[idx].RTO);
804 stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
806 return SCTP_ERROR_NONE;
811 sctp_handle_cookie_ack (sctp_header_t * sctp_hdr,
812 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
813 sctp_connection_t * sctp_conn, vlib_buffer_t * b0)
816 /* Stop T1_COOKIE timer */
817 u8 idx = sctp_pick_conn_idx_on_chunk (COOKIE_ACK);
819 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
820 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
822 return SCTP_ERROR_INVALID_TAG;
825 sctp_calculate_rto (sctp_conn, idx);
827 sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T1_COOKIE);
829 sctp_conn->state = SCTP_STATE_ESTABLISHED;
831 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
832 sctp_conn->sub_conn[idx].RTO);
834 stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
836 return SCTP_ERROR_NONE;
841 sctp46_rcv_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
842 vlib_frame_t * from_frame, int is_ip4)
844 sctp_main_t *tm = vnet_get_sctp_main ();
846 u32 n_left_from, next_index, *from, *to_next;
847 u32 my_thread_index = vm->thread_index;
849 from = vlib_frame_vector_args (from_frame);
850 n_left_from = from_frame->n_vectors;
852 next_index = node->cached_next_index;
854 while (n_left_from > 0)
858 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
860 while (n_left_from > 0 && n_left_to_next > 0)
864 sctp_header_t *sctp_hdr = 0;
865 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
866 ip4_header_t *ip4_hdr = 0;
867 ip6_header_t *ip6_hdr = 0;
868 sctp_connection_t *sctp_conn, *new_sctp_conn;
869 u16 sctp_implied_length = 0;
870 u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_RCV_PHASE_N_NEXT;
880 b0 = vlib_get_buffer (vm, bi0);
882 /* If we are in SCTP_COOKIE_WAIT_STATE then the connection
883 * will come from the half-open connections pool.
886 sctp_half_open_connection_get (vnet_buffer (b0)->
887 sctp.connection_index);
889 if (PREDICT_FALSE (sctp_conn == 0))
891 error0 = SCTP_ERROR_INVALID_CONNECTION;
895 if (PREDICT_FALSE (sctp_conn == 0))
898 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
899 error0 = SCTP_ERROR_INVALID_CONNECTION;
904 ip4_hdr = vlib_buffer_get_current (b0);
905 sctp_hdr = ip4_next_header (ip4_hdr);
909 ip6_hdr = vlib_buffer_get_current (b0);
910 sctp_hdr = ip6_next_header (ip6_hdr);
912 idx = sctp_pick_conn_idx_on_state (sctp_conn->state);
914 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
916 transport_connection_t *trans_conn =
917 &sctp_conn->sub_conn[idx].connection;
919 trans_conn->lcl_port = sctp_hdr->dst_port;
920 trans_conn->rmt_port = sctp_hdr->src_port;
921 trans_conn->is_ip4 = is_ip4;
925 trans_conn->lcl_ip.ip4.as_u32 = ip4_hdr->dst_address.as_u32;
926 trans_conn->rmt_ip.ip4.as_u32 = ip4_hdr->src_address.as_u32;
930 clib_memcpy (&trans_conn->lcl_ip.ip6, &ip6_hdr->dst_address,
931 sizeof (ip6_address_t));
932 clib_memcpy (&trans_conn->rmt_ip.ip6, &ip6_hdr->src_address,
933 sizeof (ip6_address_t));
937 (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
939 sctp_implied_length =
940 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
942 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
948 sctp_is_valid_init_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
949 b0, sctp_implied_length);
951 if (error0 == SCTP_ERROR_NONE)
953 pool_get (tm->connections[my_thread_index], new_sctp_conn);
954 clib_memcpy (new_sctp_conn, sctp_conn,
955 sizeof (*new_sctp_conn));
956 new_sctp_conn->sub_conn[idx].c_c_index =
957 new_sctp_conn - tm->connections[my_thread_index];
958 new_sctp_conn->sub_conn[idx].c_thread_index =
960 new_sctp_conn->sub_conn[idx].parent = new_sctp_conn;
962 if (sctp_half_open_connection_cleanup (sctp_conn))
965 ("Cannot cleanup half-open connection; not the owning thread");
968 sctp_connection_timers_init (new_sctp_conn);
971 sctp_handle_init_ack (sctp_hdr, sctp_chunk_hdr,
972 new_sctp_conn, idx, b0,
973 sctp_implied_length);
975 sctp_init_mss (new_sctp_conn);
977 if (session_stream_connect_notify
978 (&new_sctp_conn->sub_conn[idx].connection, 0))
981 ("conn_index = %u: session_stream_connect_notify error; cleaning up connection",
982 new_sctp_conn->sub_conn[idx].connection.c_index);
983 sctp_connection_cleanup (new_sctp_conn);
987 next0 = sctp_next_output (is_ip4);
990 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
991 * are handled by the input-dispatcher function using the table-lookup
992 * hence we should never get to the "default" case below.
995 error0 = SCTP_ERROR_UNKOWN_CHUNK;
996 next0 = SCTP_NEXT_DROP;
1000 if (error0 != SCTP_ERROR_NONE)
1002 clib_warning ("error while parsing chunk");
1003 sctp_connection_cleanup (sctp_conn);
1004 next0 = SCTP_NEXT_DROP;
1009 b0->error = node->errors[error0];
1010 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1012 sctp_rx_trace_t *t0 =
1013 vlib_add_trace (vm, node, b0, sizeof (*t0));
1014 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
1017 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1018 n_left_to_next, bi0, next0);
1021 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1023 return from_frame->n_vectors;
1027 sctp4_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1028 vlib_frame_t * from_frame)
1030 return sctp46_rcv_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1034 sctp6_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1035 vlib_frame_t * from_frame)
1037 return sctp46_rcv_phase_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1041 format_sctp_rx_trace_short (u8 * s, va_list * args)
1043 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1044 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1045 sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
1047 s = format (s, "%d -> %d (%U)",
1048 clib_net_to_host_u16 (t->sctp_header.src_port),
1049 clib_net_to_host_u16 (t->sctp_header.dst_port),
1050 format_sctp_state, t->sctp_connection.state);
1056 VLIB_REGISTER_NODE (sctp4_rcv_phase_node) =
1058 .function = sctp4_rcv_phase,
1059 .name = "sctp4-rcv",
1060 /* Takes a vector of packets. */
1061 .vector_size = sizeof (u32),
1062 .n_errors = SCTP_N_ERROR,
1063 .error_strings = sctp_error_strings,
1064 .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1067 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1068 foreach_sctp_state_next
1071 .format_trace = format_sctp_rx_trace_short,
1075 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_rcv_phase_node, sctp4_rcv_phase);
1078 VLIB_REGISTER_NODE (sctp6_init_phase_node) =
1080 .function = sctp6_rcv_phase,
1081 .name = "sctp6-rcv",
1082 /* Takes a vector of packets. */
1083 .vector_size = sizeof (u32),
1084 .n_errors = SCTP_N_ERROR,
1085 .error_strings = sctp_error_strings,
1086 .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1089 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1090 foreach_sctp_state_next
1093 .format_trace = format_sctp_rx_trace_short,
1097 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_init_phase_node, sctp6_rcv_phase);
1099 vlib_node_registration_t sctp4_shutdown_phase_node;
1100 vlib_node_registration_t sctp6_shutdown_phase_node;
1103 sctp_handle_shutdown (sctp_header_t * sctp_hdr,
1104 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1105 sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
1106 u16 sctp_implied_length)
1108 sctp_shutdown_association_chunk_t *shutdown_chunk =
1109 (sctp_shutdown_association_chunk_t *) (sctp_hdr);
1111 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1112 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1114 return SCTP_ERROR_INVALID_TAG;
1118 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1120 if (sctp_is_bundling (sctp_implied_length, &shutdown_chunk->chunk_hdr))
1121 return SCTP_ERROR_BUNDLING_VIOLATION;
1123 switch (sctp_conn->state)
1125 case SCTP_STATE_ESTABLISHED:
1126 if (sctp_check_outstanding_data_chunks (sctp_conn) == 0)
1127 sctp_conn->state = SCTP_STATE_SHUTDOWN_RECEIVED;
1130 case SCTP_STATE_SHUTDOWN_SENT:
1131 sctp_send_shutdown_ack (sctp_conn);
1135 return SCTP_ERROR_NONE;
1139 sctp_handle_shutdown_ack (sctp_header_t * sctp_hdr,
1140 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1141 sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
1142 u16 sctp_implied_length)
1144 sctp_shutdown_ack_chunk_t *shutdown_ack_chunk =
1145 (sctp_shutdown_ack_chunk_t *) (sctp_hdr);
1147 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1148 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1150 return SCTP_ERROR_INVALID_TAG;
1154 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1156 if (sctp_is_bundling (sctp_implied_length, &shutdown_ack_chunk->chunk_hdr))
1157 return SCTP_ERROR_BUNDLING_VIOLATION;
1159 /* Whether we are in SCTP_STATE_SHUTDOWN_SENT or SCTP_STATE_SHUTDOWN_ACK_SENT
1160 * the reception of a SHUTDOWN_ACK chunk leads to the same actions:
1161 * - STOP T2_SHUTDOWN timer
1162 * - SEND SHUTDOWN_COMPLETE chunk
1164 sctp_timer_reset (sctp_conn, MAIN_SCTP_SUB_CONN_IDX,
1165 SCTP_TIMER_T2_SHUTDOWN);
1166 sctp_send_shutdown_complete (sctp_conn);
1168 return SCTP_ERROR_NONE;
1172 sctp_handle_shutdown_complete (sctp_header_t * sctp_hdr,
1173 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1174 sctp_connection_t * sctp_conn,
1175 vlib_buffer_t * b0, u16 sctp_implied_length)
1177 sctp_shutdown_complete_chunk_t *shutdown_complete =
1178 (sctp_shutdown_complete_chunk_t *) (sctp_hdr);
1180 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1181 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1183 return SCTP_ERROR_INVALID_TAG;
1187 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1189 if (sctp_is_bundling (sctp_implied_length, &shutdown_complete->chunk_hdr))
1190 return SCTP_ERROR_BUNDLING_VIOLATION;
1192 sctp_timer_reset (sctp_conn, MAIN_SCTP_SUB_CONN_IDX,
1193 SCTP_TIMER_T2_SHUTDOWN);
1195 sctp_conn->state = SCTP_STATE_CLOSED;
1197 stream_session_disconnect_notify (&sctp_conn->sub_conn
1198 [MAIN_SCTP_SUB_CONN_IDX].connection);
1200 return SCTP_ERROR_NONE;
1204 sctp46_shutdown_phase_inline (vlib_main_t * vm,
1205 vlib_node_runtime_t * node,
1206 vlib_frame_t * from_frame, int is_ip4)
1208 u32 n_left_from, next_index, *from, *to_next;
1209 u32 my_thread_index = vm->thread_index;
1211 from = vlib_frame_vector_args (from_frame);
1212 n_left_from = from_frame->n_vectors;
1214 next_index = node->cached_next_index;
1216 while (n_left_from > 0)
1220 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1222 while (n_left_from > 0 && n_left_to_next > 0)
1226 sctp_rx_trace_t *sctp_trace;
1227 sctp_header_t *sctp_hdr = 0;
1228 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1229 ip4_header_t *ip4_hdr = 0;
1230 ip6_header_t *ip6_hdr = 0;
1231 sctp_connection_t *sctp_conn;
1232 u16 sctp_implied_length = 0;
1233 u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_RCV_PHASE_N_NEXT;
1240 n_left_to_next -= 1;
1242 b0 = vlib_get_buffer (vm, bi0);
1244 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1247 if (PREDICT_FALSE (sctp_conn == 0))
1250 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1251 error0 = SCTP_ERROR_INVALID_CONNECTION;
1257 ip4_hdr = vlib_buffer_get_current (b0);
1258 sctp_hdr = ip4_next_header (ip4_hdr);
1262 ip6_hdr = vlib_buffer_get_current (b0);
1263 sctp_hdr = ip6_next_header (ip6_hdr);
1266 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1267 sctp_chunk_hdr = &full_hdr->common_hdr;
1269 sctp_implied_length =
1270 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1272 switch (vnet_sctp_get_chunk_type (sctp_chunk_hdr))
1276 sctp_handle_shutdown (sctp_hdr, sctp_chunk_hdr, sctp_conn, b0,
1277 sctp_implied_length);
1278 next0 = sctp_next_output (is_ip4);
1283 sctp_handle_shutdown_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1284 b0, sctp_implied_length);
1285 next0 = sctp_next_output (is_ip4);
1288 case SHUTDOWN_COMPLETE:
1290 sctp_handle_shutdown_complete (sctp_hdr, sctp_chunk_hdr,
1292 sctp_implied_length);
1294 sctp_connection_cleanup (sctp_conn);
1295 next0 = sctp_next_output (is_ip4);
1299 * DATA chunks can still be transmitted/received in the SHUTDOWN-PENDING
1300 * and SHUTDOWN-SENT states (as per RFC4960 Section 6)
1304 sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
1305 sctp_conn, b0, &next0);
1306 next0 = sctp_next_output (is_ip4);
1309 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1310 * are handled by the input-dispatcher function using the table-lookup
1311 * hence we should never get to the "default" case below.
1314 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1315 next0 = SCTP_NEXT_DROP;
1319 if (error0 != SCTP_ERROR_NONE)
1321 clib_warning ("error while parsing chunk");
1322 sctp_connection_cleanup (sctp_conn);
1323 next0 = SCTP_NEXT_DROP;
1328 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1331 vlib_add_trace (vm, node, b0, sizeof (*sctp_trace));
1332 clib_memcpy (&sctp_trace->sctp_header, sctp_hdr,
1333 sizeof (sctp_trace->sctp_header));
1334 clib_memcpy (&sctp_trace->sctp_connection, sctp_conn,
1335 sizeof (sctp_trace->sctp_connection));
1338 b0->error = node->errors[error0];
1340 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1341 n_left_to_next, bi0, next0);
1344 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1347 return from_frame->n_vectors;
1352 sctp4_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1353 vlib_frame_t * from_frame)
1355 return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1359 sctp6_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1360 vlib_frame_t * from_frame)
1362 return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1366 VLIB_REGISTER_NODE (sctp4_shutdown_phase_node) =
1368 .function = sctp4_shutdown_phase,
1369 .name = "sctp4-shutdown",
1370 /* Takes a vector of packets. */
1371 .vector_size = sizeof (u32),
1372 .n_errors = SCTP_N_ERROR,
1373 .error_strings = sctp_error_strings,
1374 .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1377 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1378 foreach_sctp_state_next
1381 .format_trace = format_sctp_rx_trace_short,
1385 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_shutdown_phase_node,
1386 sctp4_shutdown_phase);
1389 VLIB_REGISTER_NODE (sctp6_shutdown_phase_node) =
1391 .function = sctp6_shutdown_phase,
1392 .name = "sctp6-shutdown",
1393 /* Takes a vector of packets. */
1394 .vector_size = sizeof (u32),
1395 .n_errors = SCTP_N_ERROR,
1396 .error_strings = sctp_error_strings,
1397 .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1400 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1401 foreach_sctp_state_next
1404 .format_trace = format_sctp_rx_trace_short,
1408 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_shutdown_phase_node,
1409 sctp6_shutdown_phase);
1411 vlib_node_registration_t sctp4_listen_phase_node;
1412 vlib_node_registration_t sctp6_listen_phase_node;
1414 vlib_node_registration_t sctp4_established_phase_node;
1415 vlib_node_registration_t sctp6_established_phase_node;
1418 sctp_handle_sack (sctp_selective_ack_chunk_t * sack_chunk,
1419 sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b0,
1422 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1423 if (sctp_conn->local_tag != sack_chunk->sctp_hdr.verification_tag)
1425 return SCTP_ERROR_INVALID_TAG;
1428 sctp_calculate_rto (sctp_conn, idx);
1430 sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T3_RXTX,
1431 sctp_conn->sub_conn[idx].RTO);
1433 sctp_conn->sub_conn[idx].RTO_pending = 0;
1435 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].connection.is_ip4);
1437 return SCTP_ERROR_NONE;
1441 sctp_handle_heartbeat (sctp_hb_req_chunk_t * sctp_hb_chunk,
1442 sctp_connection_t * sctp_conn, u8 idx,
1443 vlib_buffer_t * b0, u16 * next0)
1445 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1446 if (sctp_conn->local_tag != sctp_hb_chunk->sctp_hdr.verification_tag)
1448 return SCTP_ERROR_INVALID_TAG;
1451 sctp_prepare_heartbeat_ack_chunk (sctp_conn, b0);
1453 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].connection.is_ip4);
1455 return SCTP_ERROR_NONE;
1459 sctp_handle_heartbeat_ack (sctp_hb_ack_chunk_t * sctp_hb_ack_chunk,
1460 sctp_connection_t * sctp_conn, u8 idx,
1461 vlib_buffer_t * b0, u16 * next0)
1463 sctp_conn->sub_conn[idx].unacknowledged_hb -= 1;
1465 sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
1466 sctp_conn->sub_conn[idx].RTO);
1468 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].connection.is_ip4);
1470 return SCTP_ERROR_NONE;
1474 sctp_node_inc_counter (vlib_main_t * vm, u32 tcp4_node, u32 tcp6_node,
1475 u8 is_ip4, u8 evt, u8 val)
1477 if (PREDICT_TRUE (!val))
1481 vlib_node_increment_counter (vm, tcp4_node, evt, val);
1483 vlib_node_increment_counter (vm, tcp6_node, evt, val);
1487 sctp46_listen_process_inline (vlib_main_t * vm,
1488 vlib_node_runtime_t * node,
1489 vlib_frame_t * from_frame, int is_ip4)
1491 u32 n_left_from, next_index, *from, *to_next;
1492 u32 my_thread_index = vm->thread_index;
1494 from = vlib_frame_vector_args (from_frame);
1495 n_left_from = from_frame->n_vectors;
1497 next_index = node->cached_next_index;
1499 while (n_left_from > 0)
1503 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1505 while (n_left_from > 0 && n_left_to_next > 0)
1509 sctp_header_t *sctp_hdr = 0;
1510 ip4_header_t *ip4_hdr;
1511 ip6_header_t *ip6_hdr;
1512 sctp_connection_t *child_conn;
1513 sctp_connection_t *sctp_listener;
1514 u16 next0 = SCTP_LISTEN_PHASE_N_NEXT, error0 = SCTP_ERROR_ENQUEUED;
1521 n_left_to_next -= 1;
1523 b0 = vlib_get_buffer (vm, bi0);
1525 sctp_listener_get (vnet_buffer (b0)->sctp.connection_index);
1529 ip4_hdr = vlib_buffer_get_current (b0);
1530 sctp_hdr = ip4_next_header (ip4_hdr);
1534 ip6_hdr = vlib_buffer_get_current (b0);
1535 sctp_hdr = ip6_next_header (ip6_hdr);
1539 sctp_lookup_connection (sctp_listener->sub_conn
1540 [MAIN_SCTP_SUB_CONN_IDX].c_fib_index, b0,
1541 my_thread_index, is_ip4);
1543 if (PREDICT_FALSE (child_conn->state != SCTP_STATE_CLOSED))
1546 ("conn_index = %u: child_conn->state != SCTP_STATE_CLOSED.... STATE=%s",
1547 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
1549 sctp_state_to_string (child_conn->state));
1550 error0 = SCTP_ERROR_CREATE_EXISTS;
1554 /* Create child session and send SYN-ACK */
1555 child_conn = sctp_connection_new (my_thread_index);
1556 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].parent = child_conn;
1557 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_port =
1559 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_port =
1561 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_is_ip4 = is_ip4;
1562 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.proto =
1563 sctp_listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.proto;
1564 child_conn->state = SCTP_STATE_CLOSED;
1568 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_ip4.as_u32 =
1569 ip4_hdr->dst_address.as_u32;
1570 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_ip4.as_u32 =
1571 ip4_hdr->src_address.as_u32;
1575 clib_memcpy (&child_conn->
1576 sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_ip6,
1577 &ip6_hdr->dst_address, sizeof (ip6_address_t));
1578 clib_memcpy (&child_conn->
1579 sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_ip6,
1580 &ip6_hdr->src_address, sizeof (ip6_address_t));
1583 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1584 sctp_chunks_common_hdr_t *sctp_chunk_hdr = &full_hdr->common_hdr;
1586 u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
1587 if (chunk_type != INIT)
1590 ("conn_index = %u: chunk_type != INIT... chunk_type=%s",
1591 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
1592 connection.c_index, sctp_chunk_to_string (chunk_type));
1594 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1595 next0 = SCTP_NEXT_DROP;
1599 u16 sctp_implied_length =
1600 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1605 sctp_connection_timers_init (child_conn);
1607 sctp_init_snd_vars (child_conn);
1610 sctp_handle_init (sctp_hdr, sctp_chunk_hdr, child_conn, b0,
1611 sctp_implied_length);
1613 sctp_init_mss (child_conn);
1615 if (error0 == SCTP_ERROR_NONE)
1617 if (stream_session_accept
1619 sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection,
1621 sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_s_index, 0))
1623 clib_warning ("session accept fail");
1624 sctp_connection_cleanup (child_conn);
1625 error0 = SCTP_ERROR_CREATE_SESSION_FAIL;
1629 next0 = sctp_next_output (is_ip4);
1632 /* Reception of a DATA chunk whilst in the CLOSED state is called
1633 * "Out of the Blue" packet and handling of the chunk needs special treatment
1634 * as per RFC4960 section 8.4
1641 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1643 sctp_rx_trace_t *t0 =
1644 vlib_add_trace (vm, node, b0, sizeof (*t0));
1645 clib_memcpy (&t0->sctp_header, sctp_hdr,
1646 sizeof (t0->sctp_header));
1647 clib_memcpy (&t0->sctp_connection, sctp_listener,
1648 sizeof (t0->sctp_connection));
1651 b0->error = node->errors[error0];
1653 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1654 n_left_to_next, bi0, next0);
1656 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1659 return from_frame->n_vectors;
1663 sctp4_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1664 vlib_frame_t * from_frame)
1666 return sctp46_listen_process_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1670 sctp6_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1671 vlib_frame_t * from_frame)
1673 return sctp46_listen_process_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1677 sctp46_established_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1678 vlib_frame_t * from_frame, int is_ip4)
1680 u32 n_left_from, next_index, *from, *to_next;
1681 u32 my_thread_index = vm->thread_index, errors = 0;
1683 from = vlib_frame_vector_args (from_frame);
1684 n_left_from = from_frame->n_vectors;
1686 next_index = node->cached_next_index;
1688 while (n_left_from > 0)
1692 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1694 while (n_left_from > 0 && n_left_to_next > 0)
1698 sctp_header_t *sctp_hdr = 0;
1699 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1700 ip4_header_t *ip4_hdr = 0;
1701 ip6_header_t *ip6_hdr = 0;
1702 sctp_connection_t *sctp_conn;
1703 u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_ESTABLISHED_PHASE_N_NEXT;
1711 n_left_to_next -= 1;
1713 b0 = vlib_get_buffer (vm, bi0);
1715 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1718 if (PREDICT_FALSE (sctp_conn == 0))
1721 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1722 error0 = SCTP_ERROR_INVALID_CONNECTION;
1727 ip4_hdr = vlib_buffer_get_current (b0);
1728 sctp_hdr = ip4_next_header (ip4_hdr);
1732 ip6_hdr = vlib_buffer_get_current (b0);
1733 sctp_hdr = ip6_next_header (ip6_hdr);
1736 idx = sctp_pick_conn_idx_on_state (sctp_conn->state);
1738 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1740 transport_connection_t *trans_conn =
1741 &sctp_conn->sub_conn[idx].connection;
1743 trans_conn->lcl_port = sctp_hdr->dst_port;
1744 trans_conn->rmt_port = sctp_hdr->src_port;
1745 trans_conn->is_ip4 = is_ip4;
1747 sctp_conn->sub_conn[idx].parent = sctp_conn;
1751 trans_conn->lcl_ip.ip4.as_u32 = ip4_hdr->dst_address.as_u32;
1752 trans_conn->rmt_ip.ip4.as_u32 = ip4_hdr->src_address.as_u32;
1756 clib_memcpy (&trans_conn->lcl_ip.ip6, &ip6_hdr->dst_address,
1757 sizeof (ip6_address_t));
1758 clib_memcpy (&trans_conn->rmt_ip.ip6, &ip6_hdr->src_address,
1759 sizeof (ip6_address_t));
1763 (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
1765 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
1771 sctp_handle_cookie_echo (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1773 next0 = sctp_next_output (is_ip4);
1778 sctp_handle_cookie_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1780 next0 = sctp_next_output (is_ip4);
1785 sctp_handle_sack ((sctp_selective_ack_chunk_t *) sctp_hdr,
1786 sctp_conn, idx, b0, &next0);
1791 sctp_handle_heartbeat ((sctp_hb_req_chunk_t *) sctp_hdr,
1792 sctp_conn, idx, b0, &next0);
1797 sctp_handle_heartbeat_ack ((sctp_hb_ack_chunk_t *) sctp_hdr,
1798 sctp_conn, idx, b0, &next0);
1803 sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
1804 sctp_conn, b0, &next0);
1807 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1808 * are handled by the input-dispatcher function using the table-lookup
1809 * hence we should never get to the "default" case below.
1812 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1813 next0 = SCTP_NEXT_DROP;
1818 b0->error = node->errors[error0];
1819 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1821 sctp_rx_trace_t *t0 =
1822 vlib_add_trace (vm, node, b0, sizeof (*t0));
1823 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
1826 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1827 n_left_to_next, bi0, next0);
1830 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1833 errors = session_manager_flush_enqueue_events (TRANSPORT_PROTO_SCTP,
1836 sctp_node_inc_counter (vm, is_ip4, sctp4_established_phase_node.index,
1837 sctp6_established_phase_node.index,
1838 SCTP_ERROR_EVENT_FIFO_FULL, errors);
1839 sctp_flush_frame_to_output (vm, my_thread_index, is_ip4);
1841 return from_frame->n_vectors;
1845 sctp4_established_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1846 vlib_frame_t * from_frame)
1848 return sctp46_established_phase_inline (vm, node, from_frame,
1853 sctp6_established_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1854 vlib_frame_t * from_frame)
1856 return sctp46_established_phase_inline (vm, node, from_frame,
1861 format_sctp_rx_trace (u8 * s, va_list * args)
1863 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1864 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1865 sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
1866 u32 indent = format_get_indent (s);
1868 s = format (s, "%U\n%U%U",
1869 format_sctp_header, &t->sctp_header, 128,
1870 format_white_space, indent,
1871 format_sctp_connection, &t->sctp_connection, 1);
1877 VLIB_REGISTER_NODE (sctp4_listen_phase_node) =
1879 .function = sctp4_listen_phase,
1880 .name = "sctp4-listen",
1881 /* Takes a vector of packets. */
1882 .vector_size = sizeof (u32),
1883 .n_errors = SCTP_N_ERROR,
1884 .error_strings = sctp_error_strings,
1885 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
1888 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
1889 foreach_sctp_state_next
1892 .format_trace = format_sctp_rx_trace_short,
1896 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_listen_phase_node, sctp4_listen_phase);
1899 VLIB_REGISTER_NODE (sctp6_listen_phase_node) =
1901 .function = sctp6_listen_phase,
1902 .name = "sctp6-listen",
1903 /* Takes a vector of packets. */
1904 .vector_size = sizeof (u32),
1905 .n_errors = SCTP_N_ERROR,
1906 .error_strings = sctp_error_strings,
1907 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
1910 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
1911 foreach_sctp_state_next
1914 .format_trace = format_sctp_rx_trace_short,
1918 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_listen_phase_node, sctp6_listen_phase);
1921 VLIB_REGISTER_NODE (sctp4_established_phase_node) =
1923 .function = sctp4_established_phase,
1924 .name = "sctp4-established",
1925 /* Takes a vector of packets. */
1926 .vector_size = sizeof (u32),
1927 .n_errors = SCTP_N_ERROR,
1928 .error_strings = sctp_error_strings,
1929 .n_next_nodes = SCTP_ESTABLISHED_PHASE_N_NEXT,
1932 #define _(s,n) [SCTP_ESTABLISHED_PHASE_NEXT_##s] = n,
1933 foreach_sctp_state_next
1936 .format_trace = format_sctp_rx_trace_short,
1940 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_established_phase_node,
1941 sctp4_established_phase);
1944 VLIB_REGISTER_NODE (sctp6_established_phase_node) =
1946 .function = sctp6_established_phase,
1947 .name = "sctp6-established",
1948 /* Takes a vector of packets. */
1949 .vector_size = sizeof (u32),
1950 .n_errors = SCTP_N_ERROR,
1951 .error_strings = sctp_error_strings,
1952 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
1955 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
1956 foreach_sctp_state_next
1959 .format_trace = format_sctp_rx_trace_short,
1963 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_established_phase_node,
1964 sctp6_established_phase);
1967 * This is the function executed first for the SCTP graph.
1968 * It takes care of doing the initial message parsing and
1969 * dispatch to the specialized function.
1972 sctp46_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
1973 vlib_frame_t * from_frame, int is_ip4)
1975 u32 n_left_from, next_index, *from, *to_next;
1976 u32 my_thread_index = vm->thread_index;
1978 sctp_main_t *tm = vnet_get_sctp_main ();
1980 from = vlib_frame_vector_args (from_frame);
1981 n_left_from = from_frame->n_vectors;
1982 next_index = node->cached_next_index;
1983 sctp_set_time_now (my_thread_index);
1985 while (n_left_from > 0)
1989 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1991 while (n_left_from > 0 && n_left_to_next > 0)
1993 int n_advance_bytes0, n_data_bytes0;
1994 u32 bi0, fib_index0;
1996 sctp_header_t *sctp_hdr = 0;
1997 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1998 sctp_connection_t *sctp_conn;
1999 transport_connection_t *trans_conn;
2000 ip4_header_t *ip4_hdr;
2001 ip6_header_t *ip6_hdr;
2002 u32 error0 = SCTP_ERROR_NO_LISTENER, next0 = SCTP_INPUT_NEXT_DROP;
2009 n_left_to_next -= 1;
2011 b0 = vlib_get_buffer (vm, bi0);
2012 vnet_buffer (b0)->tcp.flags = 0;
2013 fib_index0 = vnet_buffer (b0)->ip.fib_index;
2015 /* Checksum computed by ipx_local no need to compute again */
2019 ip4_hdr = vlib_buffer_get_current (b0);
2020 sctp_hdr = ip4_next_header (ip4_hdr);
2022 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
2023 sctp_chunk_hdr = &full_hdr->common_hdr;
2026 (ip4_header_bytes (ip4_hdr) +
2027 sizeof (sctp_payload_data_chunk_t));
2029 clib_net_to_host_u16 (ip4_hdr->length) - n_advance_bytes0;
2031 trans_conn = session_lookup_connection_wt4 (fib_index0,
2032 &ip4_hdr->dst_address,
2033 &ip4_hdr->src_address,
2036 TRANSPORT_PROTO_SCTP,
2042 ip6_hdr = vlib_buffer_get_current (b0);
2043 sctp_hdr = ip6_next_header (ip6_hdr);
2045 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
2046 sctp_chunk_hdr = &full_hdr->common_hdr;
2048 n_advance_bytes0 = sctp_header_bytes ();
2050 clib_net_to_host_u16 (ip6_hdr->payload_length) -
2052 n_advance_bytes0 += sizeof (ip6_hdr[0]);
2054 trans_conn = session_lookup_connection_wt6 (fib_index0,
2055 &ip6_hdr->dst_address,
2056 &ip6_hdr->src_address,
2059 TRANSPORT_PROTO_SCTP,
2065 if (PREDICT_FALSE (n_advance_bytes0 < 0))
2067 error0 = SCTP_ERROR_LENGTH;
2071 sctp_conn = sctp_get_connection_from_transport (trans_conn);
2072 vnet_sctp_common_hdr_params_net_to_host (sctp_chunk_hdr);
2074 u8 type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
2076 #if SCTP_DEBUG_STATE_MACHINE
2077 u8 idx = sctp_pick_conn_idx_on_state (sctp_conn->state);
2079 vnet_buffer (b0)->sctp.hdr_offset =
2080 (u8 *) sctp_hdr - (u8 *) vlib_buffer_get_current (b0);
2082 /* Session exists */
2083 if (PREDICT_TRUE (0 != sctp_conn))
2085 /* Save connection index */
2086 vnet_buffer (b0)->sctp.connection_index = trans_conn->c_index;
2087 vnet_buffer (b0)->sctp.data_offset = n_advance_bytes0;
2088 vnet_buffer (b0)->sctp.data_len = n_data_bytes0;
2090 next0 = tm->dispatch_table[sctp_conn->state][type].next;
2091 error0 = tm->dispatch_table[sctp_conn->state][type].error;
2093 SCTP_DBG_STATE_MACHINE ("CONNECTION_INDEX = %u: "
2094 "CURRENT_CONNECTION_STATE = %s,"
2095 "CHUNK_TYPE_RECEIVED = %s "
2098 [idx].connection.c_index,
2099 sctp_state_to_string (sctp_conn->state),
2100 sctp_chunk_to_string (type),
2101 phase_to_string (next0));
2104 SCTP_ADV_DBG ("n_advance_bytes0 = %u, n_data_bytes0 = %u",
2105 n_advance_bytes0, n_data_bytes0);
2112 next0 = SCTP_INPUT_NEXT_DROP;
2113 error0 = SCTP_ERROR_FILTERED;
2115 else if ((is_ip4 && tm->punt_unknown4) ||
2116 (!is_ip4 && tm->punt_unknown6))
2118 next0 = SCTP_INPUT_NEXT_PUNT_PHASE;
2119 error0 = SCTP_ERROR_PUNT;
2123 next0 = SCTP_INPUT_NEXT_DROP;
2124 error0 = SCTP_ERROR_NO_LISTENER;
2126 SCTP_DBG_STATE_MACHINE ("sctp_conn == NULL, NEXT_PHASE = %s",
2127 phase_to_string (next0));
2132 b0->error = error0 ? node->errors[error0] : 0;
2134 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2136 sctp_rx_trace_t *t0 =
2137 vlib_add_trace (vm, node, b0, sizeof (*t0));
2138 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
2140 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2141 n_left_to_next, bi0, next0);
2144 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2146 return from_frame->n_vectors;
2150 sctp4_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2151 vlib_frame_t * from_frame)
2153 return sctp46_input_dispatcher (vm, node, from_frame, 1 /* is_ip4 */ );
2157 sctp6_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2158 vlib_frame_t * from_frame)
2160 return sctp46_input_dispatcher (vm, node, from_frame, 0 /* is_ip4 */ );
2164 VLIB_REGISTER_NODE (sctp4_input_node) =
2166 .function = sctp4_input_dispatcher,
2167 .name = "sctp4-input",
2168 /* Takes a vector of packets. */
2169 .vector_size = sizeof (u32),
2170 .n_errors = SCTP_N_ERROR,
2171 .error_strings = sctp_error_strings,
2172 .n_next_nodes = SCTP_INPUT_N_NEXT,
2175 #define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
2176 foreach_sctp4_input_next
2179 .format_buffer = format_sctp_header,
2180 .format_trace = format_sctp_rx_trace,
2184 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_input_node, sctp4_input_dispatcher);
2187 VLIB_REGISTER_NODE (sctp6_input_node) =
2189 .function = sctp6_input_dispatcher,
2190 .name = "sctp6-input",
2191 /* Takes a vector of packets. */
2192 .vector_size = sizeof (u32),
2193 .n_errors = SCTP_N_ERROR,
2194 .error_strings = sctp_error_strings,
2195 .n_next_nodes = SCTP_INPUT_N_NEXT,
2198 #define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
2199 foreach_sctp6_input_next
2202 .format_buffer = format_sctp_header,
2203 .format_trace = format_sctp_rx_trace,
2207 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_input_node, sctp6_input_dispatcher);
2209 vlib_node_registration_t sctp4_input_node;
2210 vlib_node_registration_t sctp6_input_node;
2213 sctp_dispatch_table_init (sctp_main_t * tm)
2216 for (i = 0; i < ARRAY_LEN (tm->dispatch_table); i++)
2217 for (j = 0; j < ARRAY_LEN (tm->dispatch_table[i]); j++)
2219 tm->dispatch_table[i][j].next = SCTP_INPUT_NEXT_DROP;
2220 tm->dispatch_table[i][j].error = SCTP_ERROR_DISPATCH;
2223 #define _(t,f,n,e) \
2225 tm->dispatch_table[SCTP_STATE_##t][f].next = (n); \
2226 tm->dispatch_table[SCTP_STATE_##t][f].error = (e); \
2230 * SCTP STATE-MACHINE states:
2232 * _(CLOSED, "CLOSED") \
2233 * _(COOKIE_WAIT, "COOKIE_WAIT") \
2234 * _(COOKIE_ECHOED, "COOKIE_ECHOED") \
2235 * _(ESTABLISHED, "ESTABLISHED") \
2236 * _(SHUTDOWN_PENDING, "SHUTDOWN_PENDING") \
2237 * _(SHUTDOWN_SENT, "SHUTDOWN_SENT") \
2238 * _(SHUTDOWN_RECEIVED, "SHUTDOWN_RECEIVED") \
2239 * _(SHUTDOWN_ACK_SENT, "SHUTDOWN_ACK_SENT")
2241 //_(CLOSED, DATA, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */
2242 _(CLOSED, INIT, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2243 _(CLOSED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2244 _(CLOSED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2245 _(CLOSED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2246 _(CLOSED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2247 _(CLOSED, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2248 _(CLOSED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2249 _(CLOSED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2250 _(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2251 _(CLOSED, COOKIE_ECHO, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2252 _(CLOSED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2253 _(CLOSED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2254 _(CLOSED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2255 _(CLOSED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2257 _(COOKIE_WAIT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE);
2258 _(COOKIE_WAIT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2259 _(COOKIE_WAIT, INIT_ACK, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2260 _(COOKIE_WAIT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2261 _(COOKIE_WAIT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2262 _(COOKIE_WAIT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2263 _(COOKIE_WAIT, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2264 _(COOKIE_WAIT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2265 _(COOKIE_WAIT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2266 _(COOKIE_WAIT, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2267 _(COOKIE_WAIT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2268 _(COOKIE_WAIT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2269 _(COOKIE_WAIT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2270 _(COOKIE_WAIT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2271 _(COOKIE_WAIT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2273 _(COOKIE_ECHOED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE);
2274 _(COOKIE_ECHOED, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2275 _(COOKIE_ECHOED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2276 _(COOKIE_ECHOED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2277 _(COOKIE_ECHOED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2278 _(COOKIE_ECHOED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2279 _(COOKIE_ECHOED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2280 _(COOKIE_ECHOED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2281 _(COOKIE_ECHOED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2282 _(COOKIE_ECHOED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2283 _(COOKIE_ECHOED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2284 _(COOKIE_ECHOED, COOKIE_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2286 _(COOKIE_ECHOED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2287 _(COOKIE_ECHOED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2288 _(COOKIE_ECHOED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2290 _(ESTABLISHED, DATA, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2291 _(ESTABLISHED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2292 _(ESTABLISHED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2293 _(ESTABLISHED, SACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2294 _(ESTABLISHED, HEARTBEAT, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2296 _(ESTABLISHED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2298 _(ESTABLISHED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2299 _(ESTABLISHED, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2300 _(ESTABLISHED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2301 _(ESTABLISHED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2302 _(ESTABLISHED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2303 _(ESTABLISHED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2304 _(ESTABLISHED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2305 _(ESTABLISHED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2306 _(ESTABLISHED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2308 _(SHUTDOWN_PENDING, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2309 _(SHUTDOWN_PENDING, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2310 _(SHUTDOWN_PENDING, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2311 _(SHUTDOWN_PENDING, SACK, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2312 _(SHUTDOWN_PENDING, HEARTBEAT, SCTP_INPUT_NEXT_LISTEN_PHASE,
2314 _(SHUTDOWN_PENDING, HEARTBEAT_ACK, SCTP_INPUT_NEXT_LISTEN_PHASE,
2316 _(SHUTDOWN_PENDING, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2317 _(SHUTDOWN_PENDING, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2319 _(SHUTDOWN_PENDING, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2320 _(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2321 _(SHUTDOWN_PENDING, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2322 _(SHUTDOWN_PENDING, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2323 _(SHUTDOWN_PENDING, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2324 _(SHUTDOWN_PENDING, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2325 _(SHUTDOWN_PENDING, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2327 _(SHUTDOWN_SENT, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2328 _(SHUTDOWN_SENT, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2329 _(SHUTDOWN_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2330 _(SHUTDOWN_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2331 _(SHUTDOWN_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2332 _(SHUTDOWN_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2333 _(SHUTDOWN_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2334 _(SHUTDOWN_SENT, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2335 _(SHUTDOWN_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2337 _(SHUTDOWN_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2338 _(SHUTDOWN_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2339 _(SHUTDOWN_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2340 _(SHUTDOWN_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2341 _(SHUTDOWN_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2343 _(SHUTDOWN_RECEIVED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2344 _(SHUTDOWN_RECEIVED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2345 _(SHUTDOWN_RECEIVED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2346 _(SHUTDOWN_RECEIVED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2347 _(SHUTDOWN_RECEIVED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2348 _(SHUTDOWN_RECEIVED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2349 _(SHUTDOWN_RECEIVED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2350 _(SHUTDOWN_RECEIVED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2351 _(SHUTDOWN_RECEIVED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2353 _(SHUTDOWN_RECEIVED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2354 _(SHUTDOWN_RECEIVED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2355 _(SHUTDOWN_RECEIVED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2356 _(SHUTDOWN_RECEIVED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2357 _(SHUTDOWN_RECEIVED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2359 _(SHUTDOWN_ACK_SENT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2360 _(SHUTDOWN_ACK_SENT, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2361 _(SHUTDOWN_ACK_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2362 _(SHUTDOWN_ACK_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2363 _(SHUTDOWN_ACK_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2364 _(SHUTDOWN_ACK_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2365 _(SHUTDOWN_ACK_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2366 _(SHUTDOWN_ACK_SENT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2367 _(SHUTDOWN_ACK_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2368 _(SHUTDOWN_ACK_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2369 _(SHUTDOWN_ACK_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2370 _(SHUTDOWN_ACK_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2371 _(SHUTDOWN_ACK_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2372 _(SHUTDOWN_ACK_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2375 /* TODO: Handle COOKIE ECHO when a TCB Exists */
2381 sctp_input_init (vlib_main_t * vm)
2383 clib_error_t *error = 0;
2384 sctp_main_t *tm = vnet_get_sctp_main ();
2386 if ((error = vlib_call_init_function (vm, sctp_init)))
2389 /* Initialize dispatch table. */
2390 sctp_dispatch_table_init (tm);
2395 VLIB_INIT_FUNCTION (sctp_input_init);
2398 * fd.io coding-style-patch-verification: ON
2401 * eval: (c-set-style "gnu")