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, vlib_buffer_t * b0,
431 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 /* remote_tag to be placed in the VERIFICATION_TAG field of the COOKIE_ECHO chunk */
454 sctp_conn->remote_tag = init_ack_chunk->initiate_tag;
455 sctp_conn->remote_initial_tsn =
456 clib_net_to_host_u32 (init_ack_chunk->initial_tsn);
457 sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn;
458 sctp_conn->next_tsn_expected = sctp_conn->remote_initial_tsn + 1;
459 SCTP_CONN_TRACKING_DBG ("sctp_conn->remote_initial_tsn = %u",
460 sctp_conn->remote_initial_tsn);
461 sctp_conn->snd_opts.a_rwnd = clib_net_to_host_u32 (init_ack_chunk->a_rwnd);
463 u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr);
465 if (length > sizeof (sctp_init_ack_chunk_t))
467 * There are optional parameters in the INIT ACK chunk
470 u16 pointer_offset = sizeof (sctp_init_ack_chunk_t);
472 while (pointer_offset < length)
474 sctp_opt_params_hdr_t *opt_params_hdr =
475 (sctp_opt_params_hdr_t *) ((char *) init_ack_chunk +
478 switch (clib_net_to_host_u16 (opt_params_hdr->type))
480 case SCTP_IPV4_ADDRESS_TYPE:
482 sctp_ipv4_addr_param_t *ipv4 =
483 (sctp_ipv4_addr_param_t *) opt_params_hdr;
484 clib_memcpy (ip4_addr, &ipv4->address,
485 sizeof (ip4_address_t));
487 sctp_sub_connection_add_ip4 (vlib_get_thread_index (), ipv4);
491 case SCTP_IPV6_ADDRESS_TYPE:
493 sctp_ipv6_addr_param_t *ipv6 =
494 (sctp_ipv6_addr_param_t *) opt_params_hdr;
495 clib_memcpy (ip6_addr, &ipv6->address,
496 sizeof (ip6_address_t));
498 sctp_sub_connection_add_ip6 (vlib_get_thread_index (), ipv6);
502 case SCTP_STATE_COOKIE_TYPE:
504 sctp_state_cookie_param_t *state_cookie_param =
505 (sctp_state_cookie_param_t *) opt_params_hdr;
507 clib_memcpy (&state_cookie, state_cookie_param,
508 sizeof (sctp_state_cookie_param_t));
511 case SCTP_HOSTNAME_ADDRESS_TYPE:
513 sctp_hostname_param_t *hostname_addr =
514 (sctp_hostname_param_t *) opt_params_hdr;
515 clib_memcpy (hostname, hostname_addr->hostname,
519 case SCTP_UNRECOGNIZED_TYPE:
524 u16 increment = clib_net_to_host_u16 (opt_params_hdr->length);
525 /* This indicates something really bad happened */
528 return SCTP_ERROR_INVALID_TAG;
530 pointer_offset += increment;
534 sctp_prepare_cookie_echo_chunk (sctp_conn, b0, &state_cookie);
536 /* Start the T1_COOKIE timer */
537 sctp_timer_set (sctp_conn, sctp_pick_conn_idx_on_chunk (COOKIE_ECHO),
538 SCTP_TIMER_T1_COOKIE, SCTP_RTO_INIT);
540 return SCTP_ERROR_NONE;
543 /** Enqueue data out-of-order for delivery to application */
545 sctp_session_enqueue_data_ooo (sctp_connection_t * sctp_conn,
546 vlib_buffer_t * b, u16 data_len, u8 conn_idx)
548 int written, error = SCTP_ERROR_ENQUEUED;
551 session_enqueue_stream_connection (&sctp_conn->
552 sub_conn[conn_idx].connection, b, 0,
553 1 /* queue event */ ,
556 /* Update next_tsn_expected */
557 if (PREDICT_TRUE (written == data_len))
559 sctp_conn->next_tsn_expected += written;
561 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
562 sctp_conn->sub_conn[conn_idx].connection.c_index,
565 /* If more data written than expected, account for out-of-order bytes. */
566 else if (written > data_len)
568 sctp_conn->next_tsn_expected += written;
570 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
571 sctp_conn->sub_conn[conn_idx].connection.c_index,
574 else if (written > 0)
576 /* We've written something but FIFO is probably full now */
577 sctp_conn->next_tsn_expected += written;
579 error = SCTP_ERROR_PARTIALLY_ENQUEUED;
582 ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
583 sctp_conn->sub_conn[conn_idx].connection.c_index, written);
587 SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
588 sctp_conn->sub_conn[conn_idx].connection.c_index);
590 return SCTP_ERROR_FIFO_FULL;
593 /* TODO: Update out_of_order_map & SACK list */
598 /** Enqueue data for delivery to application */
600 sctp_session_enqueue_data (sctp_connection_t * sctp_conn, vlib_buffer_t * b,
601 u16 data_len, u8 conn_idx)
603 int written, error = SCTP_ERROR_ENQUEUED;
606 session_enqueue_stream_connection (&sctp_conn->
607 sub_conn[conn_idx].connection, b, 0,
608 1 /* queue event */ ,
611 /* Update next_tsn_expected */
612 if (PREDICT_TRUE (written == data_len))
614 sctp_conn->next_tsn_expected += written;
616 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
617 sctp_conn->sub_conn[conn_idx].connection.c_index,
620 /* If more data written than expected, account for out-of-order bytes. */
621 else if (written > data_len)
623 sctp_conn->next_tsn_expected += written;
625 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
626 sctp_conn->sub_conn[conn_idx].connection.c_index,
629 else if (written > 0)
631 /* We've written something but FIFO is probably full now */
632 sctp_conn->next_tsn_expected += written;
634 error = SCTP_ERROR_PARTIALLY_ENQUEUED;
637 ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
638 sctp_conn->sub_conn[conn_idx].connection.c_index, written);
642 SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
643 sctp_conn->sub_conn[conn_idx].connection.c_index);
645 return SCTP_ERROR_FIFO_FULL;
652 sctp_is_sack_delayable (sctp_connection_t * sctp_conn, u8 gapping)
656 SCTP_CONN_TRACKING_DBG
657 ("gapping != 0: CONN_INDEX = %u, sctp_conn->ack_state = %u",
658 sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
662 if (sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS)
664 SCTP_CONN_TRACKING_DBG
665 ("sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS: CONN_INDEX = %u, sctp_conn->ack_state = %u",
666 sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
670 sctp_conn->ack_state += 1;
676 sctp_is_connection_gapping (sctp_connection_t * sctp_conn, u32 tsn,
679 if (sctp_conn->next_tsn_expected != tsn) // It means data transmission is GAPPING
681 SCTP_CONN_TRACKING_DBG
682 ("GAPPING: CONN_INDEX = %u, sctp_conn->next_tsn_expected = %u, tsn = %u, diff = %u",
683 sctp_conn->sub_conn[idx].connection.c_index,
684 sctp_conn->next_tsn_expected, tsn,
685 sctp_conn->next_tsn_expected - tsn);
692 sctp_handle_data (sctp_payload_data_chunk_t * sctp_data_chunk,
693 sctp_connection_t * sctp_conn, vlib_buffer_t * b,
696 u32 error = 0, n_data_bytes;
697 u8 idx = sctp_pick_conn_idx_on_state (sctp_conn->state);
700 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
701 if (sctp_conn->local_tag != sctp_data_chunk->sctp_hdr.verification_tag)
703 return SCTP_ERROR_INVALID_TAG;
706 vnet_buffer (b)->sctp.sid = sctp_data_chunk->stream_id;
707 vnet_buffer (b)->sctp.ssn = sctp_data_chunk->stream_seq;
709 u32 tsn = clib_net_to_host_u32 (sctp_data_chunk->tsn);
711 vlib_buffer_advance (b, vnet_buffer (b)->sctp.data_offset);
712 n_data_bytes = vnet_buffer (b)->sctp.data_len;
713 ASSERT (n_data_bytes);
715 sctp_is_connection_gapping (sctp_conn, tsn, &is_gapping);
717 sctp_conn->last_rcvd_tsn = tsn;
719 SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
721 u8 bbit = vnet_sctp_get_bbit (&sctp_data_chunk->chunk_hdr);
722 u8 ebit = vnet_sctp_get_ebit (&sctp_data_chunk->chunk_hdr);
724 if (bbit == 1 && ebit == 1) /* Unfragmented message */
726 /* In order data, enqueue. Fifo figures out by itself if any out-of-order
727 * segments can be enqueued after fifo tail offset changes. */
728 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
730 else if (bbit == 1 && ebit == 0) /* First piece of a fragmented user message */
732 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
734 else if (bbit == 0 && ebit == 1) /* Last piece of a fragmented user message */
736 if (PREDICT_FALSE (is_gapping == 1))
738 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
740 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
742 else /* Middle piece of a fragmented user message */
744 if (PREDICT_FALSE (is_gapping == 1))
746 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
748 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
750 sctp_conn->last_rcvd_tsn = tsn;
752 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
754 SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
756 if (sctp_is_sack_delayable (sctp_conn, is_gapping) != 0)
757 sctp_prepare_sack_chunk (sctp_conn, b);
763 sctp_handle_cookie_echo (sctp_header_t * sctp_hdr,
764 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
765 sctp_connection_t * sctp_conn, vlib_buffer_t * b0)
769 u8 idx = sctp_pick_conn_idx_on_chunk (COOKIE_ECHO);
771 sctp_cookie_echo_chunk_t *cookie_echo =
772 (sctp_cookie_echo_chunk_t *) sctp_hdr;
774 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
775 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
777 return SCTP_ERROR_INVALID_TAG;
780 u32 now = sctp_time_now ();
782 clib_net_to_host_u32 (cookie_echo->cookie.creation_time);
783 u32 cookie_lifespan =
784 clib_net_to_host_u32 (cookie_echo->cookie.cookie_lifespan);
785 if (now > creation_time + cookie_lifespan)
787 SCTP_DBG ("now (%u) > creation_time (%u) + cookie_lifespan (%u)",
788 now, creation_time, cookie_lifespan);
789 return SCTP_ERROR_COOKIE_ECHO_VIOLATION;
792 sctp_prepare_cookie_ack_chunk (sctp_conn, b0);
795 sctp_conn->state = SCTP_STATE_ESTABLISHED;
797 stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
799 return SCTP_ERROR_NONE;
804 sctp_handle_cookie_ack (sctp_header_t * sctp_hdr,
805 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
806 sctp_connection_t * sctp_conn, vlib_buffer_t * b0)
809 /* Stop T1_COOKIE timer */
810 u8 idx = sctp_pick_conn_idx_on_chunk (COOKIE_ACK);
812 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
813 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
815 return SCTP_ERROR_INVALID_TAG;
818 sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T1_COOKIE);
820 sctp_conn->state = SCTP_STATE_ESTABLISHED;
822 stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
824 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T3_RXTX, SCTP_RTO_INIT);
826 return SCTP_ERROR_NONE;
831 sctp46_rcv_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
832 vlib_frame_t * from_frame, int is_ip4)
834 sctp_main_t *tm = vnet_get_sctp_main ();
836 u32 n_left_from, next_index, *from, *to_next;
837 u32 my_thread_index = vm->thread_index;
839 from = vlib_frame_vector_args (from_frame);
840 n_left_from = from_frame->n_vectors;
842 next_index = node->cached_next_index;
844 while (n_left_from > 0)
848 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
850 while (n_left_from > 0 && n_left_to_next > 0)
854 sctp_header_t *sctp_hdr = 0;
855 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
856 ip4_header_t *ip4_hdr = 0;
857 ip6_header_t *ip6_hdr = 0;
858 sctp_connection_t *sctp_conn, *new_sctp_conn;
859 u16 sctp_implied_length = 0;
860 u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_RCV_PHASE_N_NEXT;
870 b0 = vlib_get_buffer (vm, bi0);
872 /* If we are in SCTP_COOKIE_WAIT_STATE then the connection
873 * will come from the half-open connections pool.
876 sctp_half_open_connection_get (vnet_buffer (b0)->
877 sctp.connection_index);
879 if (PREDICT_FALSE (sctp_conn == 0))
881 error0 = SCTP_ERROR_INVALID_CONNECTION;
885 if (PREDICT_FALSE (sctp_conn == 0))
888 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
889 error0 = SCTP_ERROR_INVALID_CONNECTION;
894 ip4_hdr = vlib_buffer_get_current (b0);
895 sctp_hdr = ip4_next_header (ip4_hdr);
899 ip6_hdr = vlib_buffer_get_current (b0);
900 sctp_hdr = ip6_next_header (ip6_hdr);
902 idx = sctp_pick_conn_idx_on_state (sctp_conn->state);
904 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
906 transport_connection_t *trans_conn =
907 &sctp_conn->sub_conn[idx].connection;
909 trans_conn->lcl_port = sctp_hdr->dst_port;
910 trans_conn->rmt_port = sctp_hdr->src_port;
911 trans_conn->is_ip4 = is_ip4;
915 trans_conn->lcl_ip.ip4.as_u32 = ip4_hdr->dst_address.as_u32;
916 trans_conn->rmt_ip.ip4.as_u32 = ip4_hdr->src_address.as_u32;
920 clib_memcpy (&trans_conn->lcl_ip.ip6, &ip6_hdr->dst_address,
921 sizeof (ip6_address_t));
922 clib_memcpy (&trans_conn->rmt_ip.ip6, &ip6_hdr->src_address,
923 sizeof (ip6_address_t));
927 (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
929 sctp_implied_length =
930 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
932 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
938 sctp_is_valid_init_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
939 b0, sctp_implied_length);
941 if (error0 == SCTP_ERROR_NONE)
943 pool_get (tm->connections[my_thread_index], new_sctp_conn);
944 clib_memcpy (new_sctp_conn, sctp_conn,
945 sizeof (*new_sctp_conn));
946 new_sctp_conn->sub_conn[idx].c_c_index =
947 new_sctp_conn - tm->connections[my_thread_index];
948 new_sctp_conn->sub_conn[idx].c_thread_index =
950 new_sctp_conn->sub_conn[idx].parent = new_sctp_conn;
952 if (sctp_half_open_connection_cleanup (sctp_conn))
955 ("Cannot cleanup half-open connection; not the owning thread");
958 sctp_connection_timers_init (new_sctp_conn);
961 sctp_handle_init_ack (sctp_hdr, sctp_chunk_hdr,
963 sctp_implied_length);
965 sctp_init_mss (new_sctp_conn);
966 //sctp_init_snd_vars (new_sctp_conn);
968 if (session_stream_connect_notify
969 (&new_sctp_conn->sub_conn[idx].connection, 0))
972 ("conn_index = %u: session_stream_connect_notify error; cleaning up connection",
973 new_sctp_conn->sub_conn[idx].connection.c_index);
974 sctp_connection_cleanup (new_sctp_conn);
978 next0 = sctp_next_output (is_ip4);
981 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
982 * are handled by the input-dispatcher function using the table-lookup
983 * hence we should never get to the "default" case below.
986 error0 = SCTP_ERROR_UNKOWN_CHUNK;
987 next0 = SCTP_NEXT_DROP;
991 if (error0 != SCTP_ERROR_NONE)
993 clib_warning ("error while parsing chunk");
994 sctp_connection_cleanup (sctp_conn);
995 next0 = SCTP_NEXT_DROP;
1000 b0->error = node->errors[error0];
1001 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1003 sctp_rx_trace_t *t0 =
1004 vlib_add_trace (vm, node, b0, sizeof (*t0));
1005 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
1008 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1009 n_left_to_next, bi0, next0);
1012 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1014 return from_frame->n_vectors;
1018 sctp4_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1019 vlib_frame_t * from_frame)
1021 return sctp46_rcv_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1025 sctp6_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1026 vlib_frame_t * from_frame)
1028 return sctp46_rcv_phase_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1032 format_sctp_rx_trace_short (u8 * s, va_list * args)
1034 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1035 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1036 sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
1038 s = format (s, "%d -> %d (%U)",
1039 clib_net_to_host_u16 (t->sctp_header.src_port),
1040 clib_net_to_host_u16 (t->sctp_header.dst_port),
1041 format_sctp_state, t->sctp_connection.state);
1047 VLIB_REGISTER_NODE (sctp4_rcv_phase_node) =
1049 .function = sctp4_rcv_phase,
1050 .name = "sctp4-rcv",
1051 /* Takes a vector of packets. */
1052 .vector_size = sizeof (u32),
1053 .n_errors = SCTP_N_ERROR,
1054 .error_strings = sctp_error_strings,
1055 .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1058 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1059 foreach_sctp_state_next
1062 .format_trace = format_sctp_rx_trace_short,
1066 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_rcv_phase_node, sctp4_rcv_phase);
1069 VLIB_REGISTER_NODE (sctp6_init_phase_node) =
1071 .function = sctp6_rcv_phase,
1072 .name = "sctp6-rcv",
1073 /* Takes a vector of packets. */
1074 .vector_size = sizeof (u32),
1075 .n_errors = SCTP_N_ERROR,
1076 .error_strings = sctp_error_strings,
1077 .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1080 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1081 foreach_sctp_state_next
1084 .format_trace = format_sctp_rx_trace_short,
1088 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_init_phase_node, sctp6_rcv_phase);
1090 vlib_node_registration_t sctp4_shutdown_phase_node;
1091 vlib_node_registration_t sctp6_shutdown_phase_node;
1094 sctp_handle_shutdown (sctp_header_t * sctp_hdr,
1095 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1096 sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
1097 u16 sctp_implied_length)
1099 sctp_shutdown_association_chunk_t *shutdown_chunk =
1100 (sctp_shutdown_association_chunk_t *) (sctp_hdr);
1102 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1103 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1105 return SCTP_ERROR_INVALID_TAG;
1109 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1111 if (sctp_is_bundling (sctp_implied_length, &shutdown_chunk->chunk_hdr))
1112 return SCTP_ERROR_BUNDLING_VIOLATION;
1114 switch (sctp_conn->state)
1116 case SCTP_STATE_ESTABLISHED:
1117 if (sctp_check_outstanding_data_chunks (sctp_conn) == 0)
1118 sctp_conn->state = SCTP_STATE_SHUTDOWN_RECEIVED;
1121 case SCTP_STATE_SHUTDOWN_SENT:
1122 sctp_send_shutdown_ack (sctp_conn);
1126 return SCTP_ERROR_NONE;
1130 sctp_handle_shutdown_ack (sctp_header_t * sctp_hdr,
1131 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1132 sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
1133 u16 sctp_implied_length)
1135 sctp_shutdown_ack_chunk_t *shutdown_ack_chunk =
1136 (sctp_shutdown_ack_chunk_t *) (sctp_hdr);
1138 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1139 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1141 return SCTP_ERROR_INVALID_TAG;
1145 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1147 if (sctp_is_bundling (sctp_implied_length, &shutdown_ack_chunk->chunk_hdr))
1148 return SCTP_ERROR_BUNDLING_VIOLATION;
1150 /* Whether we are in SCTP_STATE_SHUTDOWN_SENT or SCTP_STATE_SHUTDOWN_ACK_SENT
1151 * the reception of a SHUTDOWN_ACK chunk leads to the same actions:
1152 * - STOP T2_SHUTDOWN timer
1153 * - SEND SHUTDOWN_COMPLETE chunk
1155 sctp_timer_reset (sctp_conn, MAIN_SCTP_SUB_CONN_IDX,
1156 SCTP_TIMER_T2_SHUTDOWN);
1157 sctp_send_shutdown_complete (sctp_conn);
1159 return SCTP_ERROR_NONE;
1163 sctp_handle_shutdown_complete (sctp_header_t * sctp_hdr,
1164 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1165 sctp_connection_t * sctp_conn,
1166 vlib_buffer_t * b0, u16 sctp_implied_length)
1168 sctp_shutdown_complete_chunk_t *shutdown_complete =
1169 (sctp_shutdown_complete_chunk_t *) (sctp_hdr);
1171 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1172 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1174 return SCTP_ERROR_INVALID_TAG;
1178 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1180 if (sctp_is_bundling (sctp_implied_length, &shutdown_complete->chunk_hdr))
1181 return SCTP_ERROR_BUNDLING_VIOLATION;
1183 sctp_timer_reset (sctp_conn, MAIN_SCTP_SUB_CONN_IDX,
1184 SCTP_TIMER_T2_SHUTDOWN);
1186 sctp_conn->state = SCTP_STATE_CLOSED;
1188 stream_session_disconnect_notify (&sctp_conn->sub_conn
1189 [MAIN_SCTP_SUB_CONN_IDX].connection);
1191 return SCTP_ERROR_NONE;
1195 sctp46_shutdown_phase_inline (vlib_main_t * vm,
1196 vlib_node_runtime_t * node,
1197 vlib_frame_t * from_frame, int is_ip4)
1199 u32 n_left_from, next_index, *from, *to_next;
1200 u32 my_thread_index = vm->thread_index;
1202 from = vlib_frame_vector_args (from_frame);
1203 n_left_from = from_frame->n_vectors;
1205 next_index = node->cached_next_index;
1207 while (n_left_from > 0)
1211 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1213 while (n_left_from > 0 && n_left_to_next > 0)
1217 sctp_rx_trace_t *sctp_trace;
1218 sctp_header_t *sctp_hdr = 0;
1219 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1220 ip4_header_t *ip4_hdr = 0;
1221 ip6_header_t *ip6_hdr = 0;
1222 sctp_connection_t *sctp_conn;
1223 u16 sctp_implied_length = 0;
1224 u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_RCV_PHASE_N_NEXT;
1231 n_left_to_next -= 1;
1233 b0 = vlib_get_buffer (vm, bi0);
1235 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1238 if (PREDICT_FALSE (sctp_conn == 0))
1241 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1242 error0 = SCTP_ERROR_INVALID_CONNECTION;
1248 ip4_hdr = vlib_buffer_get_current (b0);
1249 sctp_hdr = ip4_next_header (ip4_hdr);
1253 ip6_hdr = vlib_buffer_get_current (b0);
1254 sctp_hdr = ip6_next_header (ip6_hdr);
1257 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1258 sctp_chunk_hdr = &full_hdr->common_hdr;
1260 sctp_implied_length =
1261 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1263 switch (vnet_sctp_get_chunk_type (sctp_chunk_hdr))
1267 sctp_handle_shutdown (sctp_hdr, sctp_chunk_hdr, sctp_conn, b0,
1268 sctp_implied_length);
1269 next0 = sctp_next_output (is_ip4);
1274 sctp_handle_shutdown_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1275 b0, sctp_implied_length);
1276 next0 = sctp_next_output (is_ip4);
1279 case SHUTDOWN_COMPLETE:
1281 sctp_handle_shutdown_complete (sctp_hdr, sctp_chunk_hdr,
1283 sctp_implied_length);
1285 sctp_connection_cleanup (sctp_conn);
1286 next0 = sctp_next_output (is_ip4);
1290 * DATA chunks can still be transmitted/received in the SHUTDOWN-PENDING
1291 * and SHUTDOWN-SENT states (as per RFC4960 Section 6)
1295 sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
1296 sctp_conn, b0, &next0);
1297 next0 = sctp_next_output (is_ip4);
1300 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1301 * are handled by the input-dispatcher function using the table-lookup
1302 * hence we should never get to the "default" case below.
1305 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1306 next0 = SCTP_NEXT_DROP;
1310 if (error0 != SCTP_ERROR_NONE)
1312 clib_warning ("error while parsing chunk");
1313 sctp_connection_cleanup (sctp_conn);
1314 next0 = SCTP_NEXT_DROP;
1319 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1322 vlib_add_trace (vm, node, b0, sizeof (*sctp_trace));
1323 clib_memcpy (&sctp_trace->sctp_header, sctp_hdr,
1324 sizeof (sctp_trace->sctp_header));
1325 clib_memcpy (&sctp_trace->sctp_connection, sctp_conn,
1326 sizeof (sctp_trace->sctp_connection));
1329 b0->error = node->errors[error0];
1331 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1332 n_left_to_next, bi0, next0);
1335 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1338 return from_frame->n_vectors;
1343 sctp4_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1344 vlib_frame_t * from_frame)
1346 return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1350 sctp6_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1351 vlib_frame_t * from_frame)
1353 return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1357 VLIB_REGISTER_NODE (sctp4_shutdown_phase_node) =
1359 .function = sctp4_shutdown_phase,
1360 .name = "sctp4-shutdown",
1361 /* Takes a vector of packets. */
1362 .vector_size = sizeof (u32),
1363 .n_errors = SCTP_N_ERROR,
1364 .error_strings = sctp_error_strings,
1365 .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1368 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1369 foreach_sctp_state_next
1372 .format_trace = format_sctp_rx_trace_short,
1376 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_shutdown_phase_node,
1377 sctp4_shutdown_phase);
1380 VLIB_REGISTER_NODE (sctp6_shutdown_phase_node) =
1382 .function = sctp6_shutdown_phase,
1383 .name = "sctp6-shutdown",
1384 /* Takes a vector of packets. */
1385 .vector_size = sizeof (u32),
1386 .n_errors = SCTP_N_ERROR,
1387 .error_strings = sctp_error_strings,
1388 .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1391 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1392 foreach_sctp_state_next
1395 .format_trace = format_sctp_rx_trace_short,
1399 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_shutdown_phase_node,
1400 sctp6_shutdown_phase);
1402 vlib_node_registration_t sctp4_listen_phase_node;
1403 vlib_node_registration_t sctp6_listen_phase_node;
1405 vlib_node_registration_t sctp4_established_phase_node;
1406 vlib_node_registration_t sctp6_established_phase_node;
1409 sctp_handle_sack (sctp_selective_ack_chunk_t * sack_chunk,
1410 sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b0,
1413 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1414 if (sctp_conn->local_tag != sack_chunk->sctp_hdr.verification_tag)
1416 return SCTP_ERROR_INVALID_TAG;
1419 sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T3_RXTX, SCTP_RTO_INIT);
1421 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].connection.is_ip4);
1423 return SCTP_ERROR_NONE;
1427 sctp_handle_heartbeat (sctp_hb_req_chunk_t * sctp_hb_chunk,
1428 sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
1431 return SCTP_ERROR_NONE;
1435 sctp_handle_heartbeat_ack (sctp_hb_ack_chunk_t * sctp_hb_ack_chunk,
1436 sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
1439 return SCTP_ERROR_NONE;
1443 sctp_node_inc_counter (vlib_main_t * vm, u32 tcp4_node, u32 tcp6_node,
1444 u8 is_ip4, u8 evt, u8 val)
1446 if (PREDICT_TRUE (!val))
1450 vlib_node_increment_counter (vm, tcp4_node, evt, val);
1452 vlib_node_increment_counter (vm, tcp6_node, evt, val);
1456 sctp46_listen_process_inline (vlib_main_t * vm,
1457 vlib_node_runtime_t * node,
1458 vlib_frame_t * from_frame, int is_ip4)
1460 u32 n_left_from, next_index, *from, *to_next;
1461 u32 my_thread_index = vm->thread_index;
1463 from = vlib_frame_vector_args (from_frame);
1464 n_left_from = from_frame->n_vectors;
1466 next_index = node->cached_next_index;
1468 while (n_left_from > 0)
1472 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1474 while (n_left_from > 0 && n_left_to_next > 0)
1478 sctp_header_t *sctp_hdr = 0;
1479 ip4_header_t *ip4_hdr;
1480 ip6_header_t *ip6_hdr;
1481 sctp_connection_t *child_conn;
1482 sctp_connection_t *sctp_listener;
1483 u16 next0 = SCTP_LISTEN_PHASE_N_NEXT, error0 = SCTP_ERROR_ENQUEUED;
1490 n_left_to_next -= 1;
1492 b0 = vlib_get_buffer (vm, bi0);
1494 sctp_listener_get (vnet_buffer (b0)->sctp.connection_index);
1498 ip4_hdr = vlib_buffer_get_current (b0);
1499 sctp_hdr = ip4_next_header (ip4_hdr);
1503 ip6_hdr = vlib_buffer_get_current (b0);
1504 sctp_hdr = ip6_next_header (ip6_hdr);
1508 sctp_lookup_connection (sctp_listener->sub_conn
1509 [MAIN_SCTP_SUB_CONN_IDX].c_fib_index, b0,
1510 my_thread_index, is_ip4);
1512 if (PREDICT_FALSE (child_conn->state != SCTP_STATE_CLOSED))
1515 ("conn_index = %u: child_conn->state != SCTP_STATE_CLOSED.... STATE=%s",
1516 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
1518 sctp_state_to_string (child_conn->state));
1519 error0 = SCTP_ERROR_CREATE_EXISTS;
1523 /* Create child session and send SYN-ACK */
1524 child_conn = sctp_connection_new (my_thread_index);
1525 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].parent = child_conn;
1526 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_port =
1528 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_port =
1530 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_is_ip4 = is_ip4;
1531 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.proto =
1532 sctp_listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.proto;
1533 child_conn->state = SCTP_STATE_CLOSED;
1537 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_ip4.as_u32 =
1538 ip4_hdr->dst_address.as_u32;
1539 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_ip4.as_u32 =
1540 ip4_hdr->src_address.as_u32;
1544 clib_memcpy (&child_conn->
1545 sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_ip6,
1546 &ip6_hdr->dst_address, sizeof (ip6_address_t));
1547 clib_memcpy (&child_conn->
1548 sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_ip6,
1549 &ip6_hdr->src_address, sizeof (ip6_address_t));
1552 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1553 sctp_chunks_common_hdr_t *sctp_chunk_hdr = &full_hdr->common_hdr;
1555 u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
1556 if (chunk_type != INIT)
1559 ("conn_index = %u: chunk_type != INIT... chunk_type=%s",
1560 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
1561 connection.c_index, sctp_chunk_to_string (chunk_type));
1563 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1564 next0 = SCTP_NEXT_DROP;
1568 u16 sctp_implied_length =
1569 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1574 sctp_connection_timers_init (child_conn);
1576 sctp_init_snd_vars (child_conn);
1579 sctp_handle_init (sctp_hdr, sctp_chunk_hdr, child_conn, b0,
1580 sctp_implied_length);
1582 sctp_init_mss (child_conn);
1584 if (error0 == SCTP_ERROR_NONE)
1586 if (stream_session_accept
1588 sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection,
1590 sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_s_index, 0))
1592 clib_warning ("session accept fail");
1593 sctp_connection_cleanup (child_conn);
1594 error0 = SCTP_ERROR_CREATE_SESSION_FAIL;
1598 next0 = sctp_next_output (is_ip4);
1601 /* Reception of a DATA chunk whilst in the CLOSED state is called
1602 * "Out of the Blue" packet and handling of the chunk needs special treatment
1603 * as per RFC4960 section 8.4
1610 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1612 sctp_rx_trace_t *t0 =
1613 vlib_add_trace (vm, node, b0, sizeof (*t0));
1614 clib_memcpy (&t0->sctp_header, sctp_hdr,
1615 sizeof (t0->sctp_header));
1616 clib_memcpy (&t0->sctp_connection, sctp_listener,
1617 sizeof (t0->sctp_connection));
1620 b0->error = node->errors[error0];
1622 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1623 n_left_to_next, bi0, next0);
1625 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1628 return from_frame->n_vectors;
1632 sctp4_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1633 vlib_frame_t * from_frame)
1635 return sctp46_listen_process_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1639 sctp6_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1640 vlib_frame_t * from_frame)
1642 return sctp46_listen_process_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1646 sctp46_established_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1647 vlib_frame_t * from_frame, int is_ip4)
1649 u32 n_left_from, next_index, *from, *to_next;
1650 u32 my_thread_index = vm->thread_index, errors = 0;
1652 from = vlib_frame_vector_args (from_frame);
1653 n_left_from = from_frame->n_vectors;
1655 next_index = node->cached_next_index;
1657 while (n_left_from > 0)
1661 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1663 while (n_left_from > 0 && n_left_to_next > 0)
1667 sctp_header_t *sctp_hdr = 0;
1668 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1669 ip4_header_t *ip4_hdr = 0;
1670 ip6_header_t *ip6_hdr = 0;
1671 sctp_connection_t *sctp_conn;
1672 u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_ESTABLISHED_PHASE_N_NEXT;
1680 n_left_to_next -= 1;
1682 b0 = vlib_get_buffer (vm, bi0);
1684 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1687 if (PREDICT_FALSE (sctp_conn == 0))
1690 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1691 error0 = SCTP_ERROR_INVALID_CONNECTION;
1696 ip4_hdr = vlib_buffer_get_current (b0);
1697 sctp_hdr = ip4_next_header (ip4_hdr);
1701 ip6_hdr = vlib_buffer_get_current (b0);
1702 sctp_hdr = ip6_next_header (ip6_hdr);
1705 idx = sctp_pick_conn_idx_on_state (sctp_conn->state);
1707 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1709 transport_connection_t *trans_conn =
1710 &sctp_conn->sub_conn[idx].connection;
1712 trans_conn->lcl_port = sctp_hdr->dst_port;
1713 trans_conn->rmt_port = sctp_hdr->src_port;
1714 trans_conn->is_ip4 = is_ip4;
1716 sctp_conn->sub_conn[idx].parent = sctp_conn;
1720 trans_conn->lcl_ip.ip4.as_u32 = ip4_hdr->dst_address.as_u32;
1721 trans_conn->rmt_ip.ip4.as_u32 = ip4_hdr->src_address.as_u32;
1725 clib_memcpy (&trans_conn->lcl_ip.ip6, &ip6_hdr->dst_address,
1726 sizeof (ip6_address_t));
1727 clib_memcpy (&trans_conn->rmt_ip.ip6, &ip6_hdr->src_address,
1728 sizeof (ip6_address_t));
1732 (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
1734 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
1740 sctp_handle_cookie_echo (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1742 next0 = sctp_next_output (is_ip4);
1747 sctp_handle_cookie_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1749 next0 = sctp_next_output (is_ip4);
1754 sctp_handle_sack ((sctp_selective_ack_chunk_t *) sctp_hdr,
1755 sctp_conn, idx, b0, &next0);
1760 sctp_handle_heartbeat ((sctp_hb_req_chunk_t *) sctp_hdr,
1761 sctp_conn, b0, &next0);
1766 sctp_handle_heartbeat_ack ((sctp_hb_ack_chunk_t *) sctp_hdr,
1767 sctp_conn, b0, &next0);
1772 sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
1773 sctp_conn, b0, &next0);
1776 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1777 * are handled by the input-dispatcher function using the table-lookup
1778 * hence we should never get to the "default" case below.
1781 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1782 next0 = SCTP_NEXT_DROP;
1787 b0->error = node->errors[error0];
1788 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1790 sctp_rx_trace_t *t0 =
1791 vlib_add_trace (vm, node, b0, sizeof (*t0));
1792 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
1795 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1796 n_left_to_next, bi0, next0);
1799 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1802 errors = session_manager_flush_enqueue_events (TRANSPORT_PROTO_SCTP,
1805 sctp_node_inc_counter (vm, is_ip4, sctp4_established_phase_node.index,
1806 sctp6_established_phase_node.index,
1807 SCTP_ERROR_EVENT_FIFO_FULL, errors);
1808 sctp_flush_frame_to_output (vm, my_thread_index, is_ip4);
1810 return from_frame->n_vectors;
1814 sctp4_established_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1815 vlib_frame_t * from_frame)
1817 return sctp46_established_phase_inline (vm, node, from_frame,
1822 sctp6_established_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1823 vlib_frame_t * from_frame)
1825 return sctp46_established_phase_inline (vm, node, from_frame,
1830 format_sctp_rx_trace (u8 * s, va_list * args)
1832 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1833 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1834 sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
1835 u32 indent = format_get_indent (s);
1837 s = format (s, "%U\n%U%U",
1838 format_sctp_header, &t->sctp_header, 128,
1839 format_white_space, indent,
1840 format_sctp_connection, &t->sctp_connection, 1);
1846 VLIB_REGISTER_NODE (sctp4_listen_phase_node) =
1848 .function = sctp4_listen_phase,
1849 .name = "sctp4-listen",
1850 /* Takes a vector of packets. */
1851 .vector_size = sizeof (u32),
1852 .n_errors = SCTP_N_ERROR,
1853 .error_strings = sctp_error_strings,
1854 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
1857 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
1858 foreach_sctp_state_next
1861 .format_trace = format_sctp_rx_trace_short,
1865 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_listen_phase_node, sctp4_listen_phase);
1868 VLIB_REGISTER_NODE (sctp6_listen_phase_node) =
1870 .function = sctp6_listen_phase,
1871 .name = "sctp6-listen",
1872 /* Takes a vector of packets. */
1873 .vector_size = sizeof (u32),
1874 .n_errors = SCTP_N_ERROR,
1875 .error_strings = sctp_error_strings,
1876 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
1879 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
1880 foreach_sctp_state_next
1883 .format_trace = format_sctp_rx_trace_short,
1887 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_listen_phase_node, sctp6_listen_phase);
1890 VLIB_REGISTER_NODE (sctp4_established_phase_node) =
1892 .function = sctp4_established_phase,
1893 .name = "sctp4-established",
1894 /* Takes a vector of packets. */
1895 .vector_size = sizeof (u32),
1896 .n_errors = SCTP_N_ERROR,
1897 .error_strings = sctp_error_strings,
1898 .n_next_nodes = SCTP_ESTABLISHED_PHASE_N_NEXT,
1901 #define _(s,n) [SCTP_ESTABLISHED_PHASE_NEXT_##s] = n,
1902 foreach_sctp_state_next
1905 .format_trace = format_sctp_rx_trace_short,
1909 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_established_phase_node,
1910 sctp4_established_phase);
1913 VLIB_REGISTER_NODE (sctp6_established_phase_node) =
1915 .function = sctp6_established_phase,
1916 .name = "sctp6-established",
1917 /* Takes a vector of packets. */
1918 .vector_size = sizeof (u32),
1919 .n_errors = SCTP_N_ERROR,
1920 .error_strings = sctp_error_strings,
1921 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
1924 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
1925 foreach_sctp_state_next
1928 .format_trace = format_sctp_rx_trace_short,
1932 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_established_phase_node,
1933 sctp6_established_phase);
1936 * This is the function executed first for the SCTP graph.
1937 * It takes care of doing the initial message parsing and
1938 * dispatch to the specialized function.
1941 sctp46_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
1942 vlib_frame_t * from_frame, int is_ip4)
1944 u32 n_left_from, next_index, *from, *to_next;
1945 u32 my_thread_index = vm->thread_index;
1947 sctp_main_t *tm = vnet_get_sctp_main ();
1949 from = vlib_frame_vector_args (from_frame);
1950 n_left_from = from_frame->n_vectors;
1951 next_index = node->cached_next_index;
1952 sctp_set_time_now (my_thread_index);
1954 while (n_left_from > 0)
1958 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1960 while (n_left_from > 0 && n_left_to_next > 0)
1962 int n_advance_bytes0, n_data_bytes0;
1963 u32 bi0, fib_index0;
1965 sctp_header_t *sctp_hdr = 0;
1966 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1967 sctp_connection_t *sctp_conn;
1968 transport_connection_t *trans_conn;
1969 ip4_header_t *ip4_hdr;
1970 ip6_header_t *ip6_hdr;
1971 u32 error0 = SCTP_ERROR_NO_LISTENER, next0 = SCTP_INPUT_NEXT_DROP;
1978 n_left_to_next -= 1;
1980 b0 = vlib_get_buffer (vm, bi0);
1981 vnet_buffer (b0)->tcp.flags = 0;
1982 fib_index0 = vnet_buffer (b0)->ip.fib_index;
1984 /* Checksum computed by ipx_local no need to compute again */
1988 ip4_hdr = vlib_buffer_get_current (b0);
1989 sctp_hdr = ip4_next_header (ip4_hdr);
1991 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1992 sctp_chunk_hdr = &full_hdr->common_hdr;
1995 (ip4_header_bytes (ip4_hdr) +
1996 sizeof (sctp_payload_data_chunk_t));
1998 clib_net_to_host_u16 (ip4_hdr->length) - n_advance_bytes0;
2000 trans_conn = session_lookup_connection_wt4 (fib_index0,
2001 &ip4_hdr->dst_address,
2002 &ip4_hdr->src_address,
2005 TRANSPORT_PROTO_SCTP,
2011 ip6_hdr = vlib_buffer_get_current (b0);
2012 sctp_hdr = ip6_next_header (ip6_hdr);
2014 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
2015 sctp_chunk_hdr = &full_hdr->common_hdr;
2017 n_advance_bytes0 = sctp_header_bytes ();
2019 clib_net_to_host_u16 (ip6_hdr->payload_length) -
2021 n_advance_bytes0 += sizeof (ip6_hdr[0]);
2023 trans_conn = session_lookup_connection_wt6 (fib_index0,
2024 &ip6_hdr->dst_address,
2025 &ip6_hdr->src_address,
2028 TRANSPORT_PROTO_SCTP,
2034 if (PREDICT_FALSE (n_advance_bytes0 < 0))
2036 error0 = SCTP_ERROR_LENGTH;
2040 sctp_conn = sctp_get_connection_from_transport (trans_conn);
2041 vnet_sctp_common_hdr_params_net_to_host (sctp_chunk_hdr);
2043 u8 type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
2045 #if SCTP_DEBUG_STATE_MACHINE
2046 u8 idx = sctp_pick_conn_idx_on_state (sctp_conn->state);
2048 vnet_buffer (b0)->sctp.hdr_offset =
2049 (u8 *) sctp_hdr - (u8 *) vlib_buffer_get_current (b0);
2051 /* Session exists */
2052 if (PREDICT_TRUE (0 != sctp_conn))
2054 /* Save connection index */
2055 vnet_buffer (b0)->sctp.connection_index = trans_conn->c_index;
2056 vnet_buffer (b0)->sctp.data_offset = n_advance_bytes0;
2057 vnet_buffer (b0)->sctp.data_len = n_data_bytes0;
2059 next0 = tm->dispatch_table[sctp_conn->state][type].next;
2060 error0 = tm->dispatch_table[sctp_conn->state][type].error;
2062 SCTP_DBG_STATE_MACHINE ("CONNECTION_INDEX = %u: "
2063 "CURRENT_CONNECTION_STATE = %s,"
2064 "CHUNK_TYPE_RECEIVED = %s "
2067 [idx].connection.c_index,
2068 sctp_state_to_string (sctp_conn->state),
2069 sctp_chunk_to_string (type),
2070 phase_to_string (next0));
2073 SCTP_ADV_DBG ("n_advance_bytes0 = %u, n_data_bytes0 = %u",
2074 n_advance_bytes0, n_data_bytes0);
2081 next0 = SCTP_INPUT_NEXT_DROP;
2082 error0 = SCTP_ERROR_FILTERED;
2084 else if ((is_ip4 && tm->punt_unknown4) ||
2085 (!is_ip4 && tm->punt_unknown6))
2087 next0 = SCTP_INPUT_NEXT_PUNT_PHASE;
2088 error0 = SCTP_ERROR_PUNT;
2092 next0 = SCTP_INPUT_NEXT_DROP;
2093 error0 = SCTP_ERROR_NO_LISTENER;
2095 SCTP_DBG_STATE_MACHINE ("sctp_conn == NULL, NEXT_PHASE = %s",
2096 phase_to_string (next0));
2101 b0->error = error0 ? node->errors[error0] : 0;
2103 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2105 sctp_rx_trace_t *t0 =
2106 vlib_add_trace (vm, node, b0, sizeof (*t0));
2107 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
2109 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2110 n_left_to_next, bi0, next0);
2113 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2115 return from_frame->n_vectors;
2119 sctp4_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2120 vlib_frame_t * from_frame)
2122 return sctp46_input_dispatcher (vm, node, from_frame, 1 /* is_ip4 */ );
2126 sctp6_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2127 vlib_frame_t * from_frame)
2129 return sctp46_input_dispatcher (vm, node, from_frame, 0 /* is_ip4 */ );
2133 VLIB_REGISTER_NODE (sctp4_input_node) =
2135 .function = sctp4_input_dispatcher,
2136 .name = "sctp4-input",
2137 /* Takes a vector of packets. */
2138 .vector_size = sizeof (u32),
2139 .n_errors = SCTP_N_ERROR,
2140 .error_strings = sctp_error_strings,
2141 .n_next_nodes = SCTP_INPUT_N_NEXT,
2144 #define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
2145 foreach_sctp4_input_next
2148 .format_buffer = format_sctp_header,
2149 .format_trace = format_sctp_rx_trace,
2153 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_input_node, sctp4_input_dispatcher);
2156 VLIB_REGISTER_NODE (sctp6_input_node) =
2158 .function = sctp6_input_dispatcher,
2159 .name = "sctp6-input",
2160 /* Takes a vector of packets. */
2161 .vector_size = sizeof (u32),
2162 .n_errors = SCTP_N_ERROR,
2163 .error_strings = sctp_error_strings,
2164 .n_next_nodes = SCTP_INPUT_N_NEXT,
2167 #define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
2168 foreach_sctp6_input_next
2171 .format_buffer = format_sctp_header,
2172 .format_trace = format_sctp_rx_trace,
2176 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_input_node, sctp6_input_dispatcher);
2178 vlib_node_registration_t sctp4_input_node;
2179 vlib_node_registration_t sctp6_input_node;
2182 sctp_dispatch_table_init (sctp_main_t * tm)
2185 for (i = 0; i < ARRAY_LEN (tm->dispatch_table); i++)
2186 for (j = 0; j < ARRAY_LEN (tm->dispatch_table[i]); j++)
2188 tm->dispatch_table[i][j].next = SCTP_INPUT_NEXT_DROP;
2189 tm->dispatch_table[i][j].error = SCTP_ERROR_DISPATCH;
2192 #define _(t,f,n,e) \
2194 tm->dispatch_table[SCTP_STATE_##t][f].next = (n); \
2195 tm->dispatch_table[SCTP_STATE_##t][f].error = (e); \
2199 * SCTP STATE-MACHINE states:
2201 * _(CLOSED, "CLOSED") \
2202 * _(COOKIE_WAIT, "COOKIE_WAIT") \
2203 * _(COOKIE_ECHOED, "COOKIE_ECHOED") \
2204 * _(ESTABLISHED, "ESTABLISHED") \
2205 * _(SHUTDOWN_PENDING, "SHUTDOWN_PENDING") \
2206 * _(SHUTDOWN_SENT, "SHUTDOWN_SENT") \
2207 * _(SHUTDOWN_RECEIVED, "SHUTDOWN_RECEIVED") \
2208 * _(SHUTDOWN_ACK_SENT, "SHUTDOWN_ACK_SENT")
2210 //_(CLOSED, DATA, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */
2211 _(CLOSED, INIT, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2212 _(CLOSED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2213 _(CLOSED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2214 _(CLOSED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2215 _(CLOSED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2216 _(CLOSED, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2217 _(CLOSED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2218 _(CLOSED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2219 _(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2220 _(CLOSED, COOKIE_ECHO, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2221 _(CLOSED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2222 _(CLOSED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2223 _(CLOSED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2224 _(CLOSED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2226 _(COOKIE_WAIT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE);
2227 _(COOKIE_WAIT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2228 _(COOKIE_WAIT, INIT_ACK, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2229 _(COOKIE_WAIT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2230 _(COOKIE_WAIT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2231 _(COOKIE_WAIT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2232 _(COOKIE_WAIT, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2233 _(COOKIE_WAIT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2234 _(COOKIE_WAIT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2235 _(COOKIE_WAIT, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2236 _(COOKIE_WAIT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2237 _(COOKIE_WAIT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2238 _(COOKIE_WAIT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2239 _(COOKIE_WAIT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2240 _(COOKIE_WAIT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2242 _(COOKIE_ECHOED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE);
2243 _(COOKIE_ECHOED, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2244 _(COOKIE_ECHOED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2245 _(COOKIE_ECHOED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2246 _(COOKIE_ECHOED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2247 _(COOKIE_ECHOED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2248 _(COOKIE_ECHOED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2249 _(COOKIE_ECHOED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2250 _(COOKIE_ECHOED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2251 _(COOKIE_ECHOED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2252 _(COOKIE_ECHOED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2253 _(COOKIE_ECHOED, COOKIE_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2255 _(COOKIE_ECHOED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2256 _(COOKIE_ECHOED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2257 _(COOKIE_ECHOED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2259 _(ESTABLISHED, DATA, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2260 _(ESTABLISHED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2261 _(ESTABLISHED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2262 _(ESTABLISHED, SACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2263 _(ESTABLISHED, HEARTBEAT, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2265 _(ESTABLISHED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2267 _(ESTABLISHED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2268 _(ESTABLISHED, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2269 _(ESTABLISHED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2270 _(ESTABLISHED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2271 _(ESTABLISHED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2272 _(ESTABLISHED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2273 _(ESTABLISHED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2274 _(ESTABLISHED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2275 _(ESTABLISHED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2277 _(SHUTDOWN_PENDING, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2278 _(SHUTDOWN_PENDING, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2279 _(SHUTDOWN_PENDING, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2280 _(SHUTDOWN_PENDING, SACK, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2281 _(SHUTDOWN_PENDING, HEARTBEAT, SCTP_INPUT_NEXT_LISTEN_PHASE,
2283 _(SHUTDOWN_PENDING, HEARTBEAT_ACK, SCTP_INPUT_NEXT_LISTEN_PHASE,
2285 _(SHUTDOWN_PENDING, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2286 _(SHUTDOWN_PENDING, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2288 _(SHUTDOWN_PENDING, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2289 _(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2290 _(SHUTDOWN_PENDING, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2291 _(SHUTDOWN_PENDING, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2292 _(SHUTDOWN_PENDING, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2293 _(SHUTDOWN_PENDING, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2294 _(SHUTDOWN_PENDING, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2296 _(SHUTDOWN_SENT, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2297 _(SHUTDOWN_SENT, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2298 _(SHUTDOWN_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2299 _(SHUTDOWN_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2300 _(SHUTDOWN_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2301 _(SHUTDOWN_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2302 _(SHUTDOWN_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2303 _(SHUTDOWN_SENT, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2304 _(SHUTDOWN_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2306 _(SHUTDOWN_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2307 _(SHUTDOWN_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2308 _(SHUTDOWN_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2309 _(SHUTDOWN_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2310 _(SHUTDOWN_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2312 _(SHUTDOWN_RECEIVED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2313 _(SHUTDOWN_RECEIVED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2314 _(SHUTDOWN_RECEIVED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2315 _(SHUTDOWN_RECEIVED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2316 _(SHUTDOWN_RECEIVED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2317 _(SHUTDOWN_RECEIVED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2318 _(SHUTDOWN_RECEIVED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2319 _(SHUTDOWN_RECEIVED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2320 _(SHUTDOWN_RECEIVED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2322 _(SHUTDOWN_RECEIVED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2323 _(SHUTDOWN_RECEIVED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2324 _(SHUTDOWN_RECEIVED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2325 _(SHUTDOWN_RECEIVED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2326 _(SHUTDOWN_RECEIVED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2328 _(SHUTDOWN_ACK_SENT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2329 _(SHUTDOWN_ACK_SENT, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2330 _(SHUTDOWN_ACK_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2331 _(SHUTDOWN_ACK_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2332 _(SHUTDOWN_ACK_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2333 _(SHUTDOWN_ACK_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2334 _(SHUTDOWN_ACK_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2335 _(SHUTDOWN_ACK_SENT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2336 _(SHUTDOWN_ACK_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2337 _(SHUTDOWN_ACK_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2338 _(SHUTDOWN_ACK_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2339 _(SHUTDOWN_ACK_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2340 _(SHUTDOWN_ACK_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2341 _(SHUTDOWN_ACK_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2344 /* TODO: Handle COOKIE ECHO when a TCB Exists */
2350 sctp_input_init (vlib_main_t * vm)
2352 clib_error_t *error = 0;
2353 sctp_main_t *tm = vnet_get_sctp_main ();
2355 if ((error = vlib_call_init_function (vm, sctp_init)))
2358 /* Initialize dispatch table. */
2359 sctp_dispatch_table_init (tm);
2364 VLIB_INIT_FUNCTION (sctp_input_init);
2367 * fd.io coding-style-patch-verification: ON
2370 * eval: (c-set-style "gnu")