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 sctp_state_cookie_param_t state_cookie;
437 char hostname[FQDN_MAX_LENGTH];
439 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
440 if (sctp_conn->local_tag != init_ack_chunk->sctp_hdr.verification_tag)
442 return SCTP_ERROR_INVALID_TAG;
446 * It is not possible to bundle any other CHUNK with the INIT chunk
448 if (sctp_is_bundling (sctp_implied_length, &init_ack_chunk->chunk_hdr))
449 return SCTP_ERROR_BUNDLING_VIOLATION;
451 sctp_calculate_rto (sctp_conn, idx);
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;
485 sctp_sub_connection_add_ip4 (vlib_get_thread_index (), ipv4);
489 case SCTP_IPV6_ADDRESS_TYPE:
491 sctp_ipv6_addr_param_t *ipv6 =
492 (sctp_ipv6_addr_param_t *) opt_params_hdr;
494 sctp_sub_connection_add_ip6 (vlib_get_thread_index (), ipv6);
498 case SCTP_STATE_COOKIE_TYPE:
500 sctp_state_cookie_param_t *state_cookie_param =
501 (sctp_state_cookie_param_t *) opt_params_hdr;
503 clib_memcpy (&state_cookie, state_cookie_param,
504 sizeof (sctp_state_cookie_param_t));
507 case SCTP_HOSTNAME_ADDRESS_TYPE:
509 sctp_hostname_param_t *hostname_addr =
510 (sctp_hostname_param_t *) opt_params_hdr;
511 clib_memcpy (hostname, hostname_addr->hostname,
515 case SCTP_UNRECOGNIZED_TYPE:
520 u16 increment = clib_net_to_host_u16 (opt_params_hdr->length);
521 /* This indicates something really bad happened */
524 return SCTP_ERROR_INVALID_TAG;
526 pointer_offset += increment;
530 sctp_prepare_cookie_echo_chunk (sctp_conn, b0, &state_cookie);
532 /* Start the T1_COOKIE timer */
533 sctp_timer_set (sctp_conn, sctp_pick_conn_idx_on_chunk (COOKIE_ECHO),
534 SCTP_TIMER_T1_COOKIE, sctp_conn->sub_conn[idx].RTO);
536 return SCTP_ERROR_NONE;
539 /** Enqueue data out-of-order for delivery to application */
541 sctp_session_enqueue_data_ooo (sctp_connection_t * sctp_conn,
542 vlib_buffer_t * b, u16 data_len, u8 conn_idx)
544 int written, error = SCTP_ERROR_ENQUEUED;
547 session_enqueue_stream_connection (&sctp_conn->
548 sub_conn[conn_idx].connection, b, 0,
549 1 /* queue event */ ,
552 /* Update next_tsn_expected */
553 if (PREDICT_TRUE (written == data_len))
555 sctp_conn->next_tsn_expected += written;
557 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
558 sctp_conn->sub_conn[conn_idx].connection.c_index,
561 /* If more data written than expected, account for out-of-order bytes. */
562 else if (written > data_len)
564 sctp_conn->next_tsn_expected += written;
566 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
567 sctp_conn->sub_conn[conn_idx].connection.c_index,
570 else if (written > 0)
572 /* We've written something but FIFO is probably full now */
573 sctp_conn->next_tsn_expected += written;
575 error = SCTP_ERROR_PARTIALLY_ENQUEUED;
578 ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
579 sctp_conn->sub_conn[conn_idx].connection.c_index, written);
583 SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
584 sctp_conn->sub_conn[conn_idx].connection.c_index);
586 return SCTP_ERROR_FIFO_FULL;
589 /* TODO: Update out_of_order_map & SACK list */
594 /** Enqueue data for delivery to application */
596 sctp_session_enqueue_data (sctp_connection_t * sctp_conn, vlib_buffer_t * b,
597 u16 data_len, u8 conn_idx)
599 int written, error = SCTP_ERROR_ENQUEUED;
602 session_enqueue_stream_connection (&sctp_conn->
603 sub_conn[conn_idx].connection, b, 0,
604 1 /* queue event */ ,
607 /* Update next_tsn_expected */
608 if (PREDICT_TRUE (written == data_len))
610 sctp_conn->next_tsn_expected += written;
612 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
613 sctp_conn->sub_conn[conn_idx].connection.c_index,
616 /* If more data written than expected, account for out-of-order bytes. */
617 else if (written > data_len)
619 sctp_conn->next_tsn_expected += written;
621 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
622 sctp_conn->sub_conn[conn_idx].connection.c_index,
625 else if (written > 0)
627 /* We've written something but FIFO is probably full now */
628 sctp_conn->next_tsn_expected += written;
630 error = SCTP_ERROR_PARTIALLY_ENQUEUED;
633 ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
634 sctp_conn->sub_conn[conn_idx].connection.c_index, written);
638 SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
639 sctp_conn->sub_conn[conn_idx].connection.c_index);
641 return SCTP_ERROR_FIFO_FULL;
648 sctp_is_sack_delayable (sctp_connection_t * sctp_conn, u8 gapping)
652 SCTP_CONN_TRACKING_DBG
653 ("gapping != 0: CONN_INDEX = %u, sctp_conn->ack_state = %u",
654 sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
658 if (sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS)
660 SCTP_CONN_TRACKING_DBG
661 ("sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS: CONN_INDEX = %u, sctp_conn->ack_state = %u",
662 sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
666 sctp_conn->ack_state += 1;
672 sctp_is_connection_gapping (sctp_connection_t * sctp_conn, u32 tsn,
675 if (sctp_conn->next_tsn_expected != tsn) // It means data transmission is GAPPING
677 SCTP_CONN_TRACKING_DBG
678 ("GAPPING: CONN_INDEX = %u, sctp_conn->next_tsn_expected = %u, tsn = %u, diff = %u",
679 sctp_conn->sub_conn[idx].connection.c_index,
680 sctp_conn->next_tsn_expected, tsn,
681 sctp_conn->next_tsn_expected - tsn);
688 sctp_handle_data (sctp_payload_data_chunk_t * sctp_data_chunk,
689 sctp_connection_t * sctp_conn, vlib_buffer_t * b,
692 u32 error = 0, n_data_bytes;
693 u8 idx = sctp_pick_conn_idx_on_state (sctp_conn->state);
696 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
697 if (sctp_conn->local_tag != sctp_data_chunk->sctp_hdr.verification_tag)
699 return SCTP_ERROR_INVALID_TAG;
702 vnet_buffer (b)->sctp.sid = sctp_data_chunk->stream_id;
703 vnet_buffer (b)->sctp.ssn = sctp_data_chunk->stream_seq;
705 u32 tsn = clib_net_to_host_u32 (sctp_data_chunk->tsn);
707 vlib_buffer_advance (b, vnet_buffer (b)->sctp.data_offset);
708 n_data_bytes = vnet_buffer (b)->sctp.data_len;
709 ASSERT (n_data_bytes);
711 sctp_is_connection_gapping (sctp_conn, tsn, &is_gapping);
713 sctp_conn->last_rcvd_tsn = tsn;
715 SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
717 u8 bbit = vnet_sctp_get_bbit (&sctp_data_chunk->chunk_hdr);
718 u8 ebit = vnet_sctp_get_ebit (&sctp_data_chunk->chunk_hdr);
720 if (bbit == 1 && ebit == 1) /* Unfragmented message */
722 /* In order data, enqueue. Fifo figures out by itself if any out-of-order
723 * segments can be enqueued after fifo tail offset changes. */
724 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
726 else if (bbit == 1 && ebit == 0) /* First piece of a fragmented user message */
728 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
730 else if (bbit == 0 && ebit == 1) /* Last piece of a fragmented user message */
732 if (PREDICT_FALSE (is_gapping == 1))
734 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
736 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
738 else /* Middle piece of a fragmented user message */
740 if (PREDICT_FALSE (is_gapping == 1))
742 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
744 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
746 sctp_conn->last_rcvd_tsn = tsn;
748 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
750 SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
752 if (sctp_is_sack_delayable (sctp_conn, is_gapping) != 0)
753 sctp_prepare_sack_chunk (sctp_conn, b);
759 sctp_handle_cookie_echo (sctp_header_t * sctp_hdr,
760 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
761 sctp_connection_t * sctp_conn, vlib_buffer_t * b0)
763 u32 now = sctp_time_now ();
766 u8 idx = sctp_pick_conn_idx_on_chunk (COOKIE_ECHO);
768 sctp_cookie_echo_chunk_t *cookie_echo =
769 (sctp_cookie_echo_chunk_t *) sctp_hdr;
771 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
772 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
774 return SCTP_ERROR_INVALID_TAG;
777 sctp_calculate_rto (sctp_conn, idx);
780 clib_net_to_host_u32 (cookie_echo->cookie.creation_time);
781 u32 cookie_lifespan =
782 clib_net_to_host_u32 (cookie_echo->cookie.cookie_lifespan);
783 if (now > creation_time + cookie_lifespan)
785 SCTP_DBG ("now (%u) > creation_time (%u) + cookie_lifespan (%u)",
786 now, creation_time, cookie_lifespan);
787 return SCTP_ERROR_COOKIE_ECHO_VIOLATION;
790 sctp_prepare_cookie_ack_chunk (sctp_conn, b0);
793 sctp_conn->state = SCTP_STATE_ESTABLISHED;
795 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
796 sctp_conn->sub_conn[idx].RTO);
798 stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
800 return SCTP_ERROR_NONE;
805 sctp_handle_cookie_ack (sctp_header_t * sctp_hdr,
806 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
807 sctp_connection_t * sctp_conn, vlib_buffer_t * b0)
810 /* Stop T1_COOKIE timer */
811 u8 idx = sctp_pick_conn_idx_on_chunk (COOKIE_ACK);
813 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
814 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
816 return SCTP_ERROR_INVALID_TAG;
819 sctp_calculate_rto (sctp_conn, idx);
821 sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T1_COOKIE);
823 sctp_conn->state = SCTP_STATE_ESTABLISHED;
825 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
826 sctp_conn->sub_conn[idx].RTO);
828 stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
830 return SCTP_ERROR_NONE;
835 sctp46_rcv_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
836 vlib_frame_t * from_frame, int is_ip4)
838 sctp_main_t *tm = vnet_get_sctp_main ();
840 u32 n_left_from, next_index, *from, *to_next;
841 u32 my_thread_index = vm->thread_index;
843 from = vlib_frame_vector_args (from_frame);
844 n_left_from = from_frame->n_vectors;
846 next_index = node->cached_next_index;
848 while (n_left_from > 0)
852 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
854 while (n_left_from > 0 && n_left_to_next > 0)
858 sctp_header_t *sctp_hdr = 0;
859 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
860 ip4_header_t *ip4_hdr = 0;
861 ip6_header_t *ip6_hdr = 0;
862 sctp_connection_t *sctp_conn, *new_sctp_conn;
863 u16 sctp_implied_length = 0;
864 u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_RCV_PHASE_N_NEXT;
874 b0 = vlib_get_buffer (vm, bi0);
876 /* If we are in SCTP_COOKIE_WAIT_STATE then the connection
877 * will come from the half-open connections pool.
880 sctp_half_open_connection_get (vnet_buffer (b0)->
881 sctp.connection_index);
883 if (PREDICT_FALSE (sctp_conn == 0))
886 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
887 error0 = SCTP_ERROR_INVALID_CONNECTION;
892 ip4_hdr = vlib_buffer_get_current (b0);
893 sctp_hdr = ip4_next_header (ip4_hdr);
897 ip6_hdr = vlib_buffer_get_current (b0);
898 sctp_hdr = ip6_next_header (ip6_hdr);
900 idx = sctp_pick_conn_idx_on_state (sctp_conn->state);
902 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
904 transport_connection_t *trans_conn =
905 &sctp_conn->sub_conn[idx].connection;
907 trans_conn->lcl_port = sctp_hdr->dst_port;
908 trans_conn->rmt_port = sctp_hdr->src_port;
909 trans_conn->is_ip4 = is_ip4;
913 trans_conn->lcl_ip.ip4.as_u32 = ip4_hdr->dst_address.as_u32;
914 trans_conn->rmt_ip.ip4.as_u32 = ip4_hdr->src_address.as_u32;
918 clib_memcpy (&trans_conn->lcl_ip.ip6, &ip6_hdr->dst_address,
919 sizeof (ip6_address_t));
920 clib_memcpy (&trans_conn->rmt_ip.ip6, &ip6_hdr->src_address,
921 sizeof (ip6_address_t));
925 (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
927 sctp_implied_length =
928 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
930 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
936 sctp_is_valid_init_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
937 b0, sctp_implied_length);
939 if (error0 == SCTP_ERROR_NONE)
941 pool_get (tm->connections[my_thread_index], new_sctp_conn);
942 clib_memcpy (new_sctp_conn, sctp_conn,
943 sizeof (*new_sctp_conn));
944 new_sctp_conn->sub_conn[idx].c_c_index =
945 new_sctp_conn - tm->connections[my_thread_index];
946 new_sctp_conn->sub_conn[idx].c_thread_index =
948 new_sctp_conn->sub_conn[idx].parent = new_sctp_conn;
950 if (sctp_half_open_connection_cleanup (sctp_conn))
953 ("Cannot cleanup half-open connection; not the owning thread");
956 sctp_connection_timers_init (new_sctp_conn);
959 sctp_handle_init_ack (sctp_hdr, sctp_chunk_hdr,
960 new_sctp_conn, idx, b0,
961 sctp_implied_length);
963 sctp_init_mss (new_sctp_conn);
965 if (session_stream_connect_notify
966 (&new_sctp_conn->sub_conn[idx].connection, 0))
969 ("conn_index = %u: session_stream_connect_notify error; cleaning up connection",
970 new_sctp_conn->sub_conn[idx].connection.c_index);
971 sctp_connection_cleanup (new_sctp_conn);
975 next0 = sctp_next_output (is_ip4);
978 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
979 * are handled by the input-dispatcher function using the table-lookup
980 * hence we should never get to the "default" case below.
983 error0 = SCTP_ERROR_UNKOWN_CHUNK;
984 next0 = SCTP_NEXT_DROP;
988 if (error0 != SCTP_ERROR_NONE)
990 clib_warning ("error while parsing chunk");
991 sctp_connection_cleanup (sctp_conn);
992 next0 = SCTP_NEXT_DROP;
997 b0->error = node->errors[error0];
998 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1000 sctp_rx_trace_t *t0 =
1001 vlib_add_trace (vm, node, b0, sizeof (*t0));
1002 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
1005 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1006 n_left_to_next, bi0, next0);
1009 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1011 return from_frame->n_vectors;
1015 sctp4_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1016 vlib_frame_t * from_frame)
1018 return sctp46_rcv_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1022 sctp6_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1023 vlib_frame_t * from_frame)
1025 return sctp46_rcv_phase_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1029 format_sctp_rx_trace_short (u8 * s, va_list * args)
1031 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1032 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1033 sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
1035 s = format (s, "%d -> %d (%U)",
1036 clib_net_to_host_u16 (t->sctp_header.src_port),
1037 clib_net_to_host_u16 (t->sctp_header.dst_port),
1038 format_sctp_state, t->sctp_connection.state);
1044 VLIB_REGISTER_NODE (sctp4_rcv_phase_node) =
1046 .function = sctp4_rcv_phase,
1047 .name = "sctp4-rcv",
1048 /* Takes a vector of packets. */
1049 .vector_size = sizeof (u32),
1050 .n_errors = SCTP_N_ERROR,
1051 .error_strings = sctp_error_strings,
1052 .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1055 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1056 foreach_sctp_state_next
1059 .format_trace = format_sctp_rx_trace_short,
1063 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_rcv_phase_node, sctp4_rcv_phase);
1066 VLIB_REGISTER_NODE (sctp6_init_phase_node) =
1068 .function = sctp6_rcv_phase,
1069 .name = "sctp6-rcv",
1070 /* Takes a vector of packets. */
1071 .vector_size = sizeof (u32),
1072 .n_errors = SCTP_N_ERROR,
1073 .error_strings = sctp_error_strings,
1074 .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1077 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1078 foreach_sctp_state_next
1081 .format_trace = format_sctp_rx_trace_short,
1085 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_init_phase_node, sctp6_rcv_phase);
1087 vlib_node_registration_t sctp4_shutdown_phase_node;
1088 vlib_node_registration_t sctp6_shutdown_phase_node;
1091 sctp_handle_shutdown (sctp_header_t * sctp_hdr,
1092 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1093 sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
1094 u16 sctp_implied_length)
1096 sctp_shutdown_association_chunk_t *shutdown_chunk =
1097 (sctp_shutdown_association_chunk_t *) (sctp_hdr);
1099 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1100 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1102 return SCTP_ERROR_INVALID_TAG;
1106 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1108 if (sctp_is_bundling (sctp_implied_length, &shutdown_chunk->chunk_hdr))
1109 return SCTP_ERROR_BUNDLING_VIOLATION;
1111 switch (sctp_conn->state)
1113 case SCTP_STATE_ESTABLISHED:
1114 if (sctp_check_outstanding_data_chunks (sctp_conn) == 0)
1115 sctp_conn->state = SCTP_STATE_SHUTDOWN_RECEIVED;
1118 case SCTP_STATE_SHUTDOWN_SENT:
1119 sctp_send_shutdown_ack (sctp_conn);
1123 return SCTP_ERROR_NONE;
1127 sctp_handle_shutdown_ack (sctp_header_t * sctp_hdr,
1128 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1129 sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
1130 u16 sctp_implied_length)
1132 sctp_shutdown_ack_chunk_t *shutdown_ack_chunk =
1133 (sctp_shutdown_ack_chunk_t *) (sctp_hdr);
1135 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1136 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1138 return SCTP_ERROR_INVALID_TAG;
1142 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1144 if (sctp_is_bundling (sctp_implied_length, &shutdown_ack_chunk->chunk_hdr))
1145 return SCTP_ERROR_BUNDLING_VIOLATION;
1147 /* Whether we are in SCTP_STATE_SHUTDOWN_SENT or SCTP_STATE_SHUTDOWN_ACK_SENT
1148 * the reception of a SHUTDOWN_ACK chunk leads to the same actions:
1149 * - STOP T2_SHUTDOWN timer
1150 * - SEND SHUTDOWN_COMPLETE chunk
1152 sctp_timer_reset (sctp_conn, MAIN_SCTP_SUB_CONN_IDX,
1153 SCTP_TIMER_T2_SHUTDOWN);
1154 sctp_send_shutdown_complete (sctp_conn);
1156 return SCTP_ERROR_NONE;
1160 sctp_handle_shutdown_complete (sctp_header_t * sctp_hdr,
1161 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1162 sctp_connection_t * sctp_conn,
1163 vlib_buffer_t * b0, u16 sctp_implied_length)
1165 sctp_shutdown_complete_chunk_t *shutdown_complete =
1166 (sctp_shutdown_complete_chunk_t *) (sctp_hdr);
1168 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1169 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1171 return SCTP_ERROR_INVALID_TAG;
1175 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1177 if (sctp_is_bundling (sctp_implied_length, &shutdown_complete->chunk_hdr))
1178 return SCTP_ERROR_BUNDLING_VIOLATION;
1180 sctp_timer_reset (sctp_conn, MAIN_SCTP_SUB_CONN_IDX,
1181 SCTP_TIMER_T2_SHUTDOWN);
1183 sctp_conn->state = SCTP_STATE_CLOSED;
1185 stream_session_disconnect_notify (&sctp_conn->sub_conn
1186 [MAIN_SCTP_SUB_CONN_IDX].connection);
1188 return SCTP_ERROR_NONE;
1192 sctp46_shutdown_phase_inline (vlib_main_t * vm,
1193 vlib_node_runtime_t * node,
1194 vlib_frame_t * from_frame, int is_ip4)
1196 u32 n_left_from, next_index, *from, *to_next;
1197 u32 my_thread_index = vm->thread_index;
1199 from = vlib_frame_vector_args (from_frame);
1200 n_left_from = from_frame->n_vectors;
1202 next_index = node->cached_next_index;
1204 while (n_left_from > 0)
1208 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1210 while (n_left_from > 0 && n_left_to_next > 0)
1214 sctp_rx_trace_t *sctp_trace;
1215 sctp_header_t *sctp_hdr = 0;
1216 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1217 ip4_header_t *ip4_hdr = 0;
1218 ip6_header_t *ip6_hdr = 0;
1219 sctp_connection_t *sctp_conn;
1220 u16 sctp_implied_length = 0;
1221 u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_RCV_PHASE_N_NEXT;
1228 n_left_to_next -= 1;
1230 b0 = vlib_get_buffer (vm, bi0);
1232 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1235 if (PREDICT_FALSE (sctp_conn == 0))
1238 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1239 error0 = SCTP_ERROR_INVALID_CONNECTION;
1245 ip4_hdr = vlib_buffer_get_current (b0);
1246 sctp_hdr = ip4_next_header (ip4_hdr);
1250 ip6_hdr = vlib_buffer_get_current (b0);
1251 sctp_hdr = ip6_next_header (ip6_hdr);
1254 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1255 sctp_chunk_hdr = &full_hdr->common_hdr;
1257 sctp_implied_length =
1258 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1260 switch (vnet_sctp_get_chunk_type (sctp_chunk_hdr))
1264 sctp_handle_shutdown (sctp_hdr, sctp_chunk_hdr, sctp_conn, b0,
1265 sctp_implied_length);
1266 next0 = sctp_next_output (is_ip4);
1271 sctp_handle_shutdown_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1272 b0, sctp_implied_length);
1273 next0 = sctp_next_output (is_ip4);
1276 case SHUTDOWN_COMPLETE:
1278 sctp_handle_shutdown_complete (sctp_hdr, sctp_chunk_hdr,
1280 sctp_implied_length);
1282 sctp_connection_cleanup (sctp_conn);
1283 next0 = sctp_next_output (is_ip4);
1287 * DATA chunks can still be transmitted/received in the SHUTDOWN-PENDING
1288 * and SHUTDOWN-SENT states (as per RFC4960 Section 6)
1292 sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
1293 sctp_conn, b0, &next0);
1294 next0 = sctp_next_output (is_ip4);
1297 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1298 * are handled by the input-dispatcher function using the table-lookup
1299 * hence we should never get to the "default" case below.
1302 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1303 next0 = SCTP_NEXT_DROP;
1307 if (error0 != SCTP_ERROR_NONE)
1309 clib_warning ("error while parsing chunk");
1310 sctp_connection_cleanup (sctp_conn);
1311 next0 = SCTP_NEXT_DROP;
1316 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1319 vlib_add_trace (vm, node, b0, sizeof (*sctp_trace));
1321 if (sctp_hdr != NULL)
1322 clib_memcpy (&sctp_trace->sctp_header, sctp_hdr,
1323 sizeof (sctp_trace->sctp_header));
1325 if (sctp_conn != NULL)
1326 clib_memcpy (&sctp_trace->sctp_connection, sctp_conn,
1327 sizeof (sctp_trace->sctp_connection));
1330 b0->error = node->errors[error0];
1332 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1333 n_left_to_next, bi0, next0);
1336 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1339 return from_frame->n_vectors;
1344 sctp4_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1345 vlib_frame_t * from_frame)
1347 return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1351 sctp6_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1352 vlib_frame_t * from_frame)
1354 return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1358 VLIB_REGISTER_NODE (sctp4_shutdown_phase_node) =
1360 .function = sctp4_shutdown_phase,
1361 .name = "sctp4-shutdown",
1362 /* Takes a vector of packets. */
1363 .vector_size = sizeof (u32),
1364 .n_errors = SCTP_N_ERROR,
1365 .error_strings = sctp_error_strings,
1366 .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1369 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1370 foreach_sctp_state_next
1373 .format_trace = format_sctp_rx_trace_short,
1377 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_shutdown_phase_node,
1378 sctp4_shutdown_phase);
1381 VLIB_REGISTER_NODE (sctp6_shutdown_phase_node) =
1383 .function = sctp6_shutdown_phase,
1384 .name = "sctp6-shutdown",
1385 /* Takes a vector of packets. */
1386 .vector_size = sizeof (u32),
1387 .n_errors = SCTP_N_ERROR,
1388 .error_strings = sctp_error_strings,
1389 .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1392 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1393 foreach_sctp_state_next
1396 .format_trace = format_sctp_rx_trace_short,
1400 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_shutdown_phase_node,
1401 sctp6_shutdown_phase);
1403 vlib_node_registration_t sctp4_listen_phase_node;
1404 vlib_node_registration_t sctp6_listen_phase_node;
1406 vlib_node_registration_t sctp4_established_phase_node;
1407 vlib_node_registration_t sctp6_established_phase_node;
1410 sctp_handle_sack (sctp_selective_ack_chunk_t * sack_chunk,
1411 sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b0,
1414 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1415 if (sctp_conn->local_tag != sack_chunk->sctp_hdr.verification_tag)
1417 return SCTP_ERROR_INVALID_TAG;
1420 sctp_calculate_rto (sctp_conn, idx);
1422 sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T3_RXTX,
1423 sctp_conn->sub_conn[idx].RTO);
1425 sctp_conn->sub_conn[idx].RTO_pending = 0;
1427 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].connection.is_ip4);
1429 return SCTP_ERROR_NONE;
1433 sctp_handle_heartbeat (sctp_hb_req_chunk_t * sctp_hb_chunk,
1434 sctp_connection_t * sctp_conn, u8 idx,
1435 vlib_buffer_t * b0, u16 * next0)
1437 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1438 if (sctp_conn->local_tag != sctp_hb_chunk->sctp_hdr.verification_tag)
1440 return SCTP_ERROR_INVALID_TAG;
1443 sctp_prepare_heartbeat_ack_chunk (sctp_conn, b0);
1445 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].connection.is_ip4);
1447 return SCTP_ERROR_NONE;
1451 sctp_handle_heartbeat_ack (sctp_hb_ack_chunk_t * sctp_hb_ack_chunk,
1452 sctp_connection_t * sctp_conn, u8 idx,
1453 vlib_buffer_t * b0, u16 * next0)
1455 sctp_conn->sub_conn[idx].unacknowledged_hb -= 1;
1457 sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
1458 sctp_conn->sub_conn[idx].RTO);
1460 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].connection.is_ip4);
1462 return SCTP_ERROR_NONE;
1466 sctp_node_inc_counter (vlib_main_t * vm, u32 tcp4_node, u32 tcp6_node,
1467 u8 is_ip4, u8 evt, u8 val)
1469 if (PREDICT_TRUE (!val))
1473 vlib_node_increment_counter (vm, tcp4_node, evt, val);
1475 vlib_node_increment_counter (vm, tcp6_node, evt, val);
1479 sctp46_listen_process_inline (vlib_main_t * vm,
1480 vlib_node_runtime_t * node,
1481 vlib_frame_t * from_frame, int is_ip4)
1483 u32 n_left_from, next_index, *from, *to_next;
1484 u32 my_thread_index = vm->thread_index;
1486 from = vlib_frame_vector_args (from_frame);
1487 n_left_from = from_frame->n_vectors;
1489 next_index = node->cached_next_index;
1491 while (n_left_from > 0)
1495 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1497 while (n_left_from > 0 && n_left_to_next > 0)
1501 sctp_header_t *sctp_hdr = 0;
1502 ip4_header_t *ip4_hdr;
1503 ip6_header_t *ip6_hdr;
1504 sctp_connection_t *child_conn;
1505 sctp_connection_t *sctp_listener;
1506 u16 next0 = SCTP_LISTEN_PHASE_N_NEXT, error0 = SCTP_ERROR_ENQUEUED;
1513 n_left_to_next -= 1;
1515 b0 = vlib_get_buffer (vm, bi0);
1517 sctp_listener_get (vnet_buffer (b0)->sctp.connection_index);
1521 ip4_hdr = vlib_buffer_get_current (b0);
1522 sctp_hdr = ip4_next_header (ip4_hdr);
1526 ip6_hdr = vlib_buffer_get_current (b0);
1527 sctp_hdr = ip6_next_header (ip6_hdr);
1531 sctp_lookup_connection (sctp_listener->sub_conn
1532 [MAIN_SCTP_SUB_CONN_IDX].c_fib_index, b0,
1533 my_thread_index, is_ip4);
1535 if (PREDICT_FALSE (child_conn->state != SCTP_STATE_CLOSED))
1538 ("conn_index = %u: child_conn->state != SCTP_STATE_CLOSED.... STATE=%s",
1539 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
1541 sctp_state_to_string (child_conn->state));
1542 error0 = SCTP_ERROR_CREATE_EXISTS;
1546 /* Create child session and send SYN-ACK */
1547 child_conn = sctp_connection_new (my_thread_index);
1548 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].parent = child_conn;
1549 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_port =
1551 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_port =
1553 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_is_ip4 = is_ip4;
1554 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.proto =
1555 sctp_listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.proto;
1556 child_conn->state = SCTP_STATE_CLOSED;
1560 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_ip4.as_u32 =
1561 ip4_hdr->dst_address.as_u32;
1562 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_ip4.as_u32 =
1563 ip4_hdr->src_address.as_u32;
1567 clib_memcpy (&child_conn->
1568 sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_ip6,
1569 &ip6_hdr->dst_address, sizeof (ip6_address_t));
1570 clib_memcpy (&child_conn->
1571 sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_ip6,
1572 &ip6_hdr->src_address, sizeof (ip6_address_t));
1575 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1576 sctp_chunks_common_hdr_t *sctp_chunk_hdr = &full_hdr->common_hdr;
1578 u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
1579 if (chunk_type != INIT)
1582 ("conn_index = %u: chunk_type != INIT... chunk_type=%s",
1583 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
1584 connection.c_index, sctp_chunk_to_string (chunk_type));
1586 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1587 next0 = SCTP_NEXT_DROP;
1591 u16 sctp_implied_length =
1592 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1597 sctp_connection_timers_init (child_conn);
1599 sctp_init_snd_vars (child_conn);
1602 sctp_handle_init (sctp_hdr, sctp_chunk_hdr, child_conn, b0,
1603 sctp_implied_length);
1605 sctp_init_mss (child_conn);
1607 if (error0 == SCTP_ERROR_NONE)
1609 if (stream_session_accept
1611 sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection,
1613 sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_s_index, 0))
1615 clib_warning ("session accept fail");
1616 sctp_connection_cleanup (child_conn);
1617 error0 = SCTP_ERROR_CREATE_SESSION_FAIL;
1621 next0 = sctp_next_output (is_ip4);
1624 /* Reception of a DATA chunk whilst in the CLOSED state is called
1625 * "Out of the Blue" packet and handling of the chunk needs special treatment
1626 * as per RFC4960 section 8.4
1633 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1635 sctp_rx_trace_t *t0 =
1636 vlib_add_trace (vm, node, b0, sizeof (*t0));
1637 clib_memcpy (&t0->sctp_header, sctp_hdr,
1638 sizeof (t0->sctp_header));
1639 clib_memcpy (&t0->sctp_connection, sctp_listener,
1640 sizeof (t0->sctp_connection));
1643 b0->error = node->errors[error0];
1645 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1646 n_left_to_next, bi0, next0);
1648 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1651 return from_frame->n_vectors;
1655 sctp4_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1656 vlib_frame_t * from_frame)
1658 return sctp46_listen_process_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1662 sctp6_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1663 vlib_frame_t * from_frame)
1665 return sctp46_listen_process_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1669 sctp46_established_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1670 vlib_frame_t * from_frame, int is_ip4)
1672 u32 n_left_from, next_index, *from, *to_next;
1673 u32 my_thread_index = vm->thread_index, errors = 0;
1675 from = vlib_frame_vector_args (from_frame);
1676 n_left_from = from_frame->n_vectors;
1678 next_index = node->cached_next_index;
1680 while (n_left_from > 0)
1684 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1686 while (n_left_from > 0 && n_left_to_next > 0)
1690 sctp_header_t *sctp_hdr = 0;
1691 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1692 ip4_header_t *ip4_hdr = 0;
1693 ip6_header_t *ip6_hdr = 0;
1694 sctp_connection_t *sctp_conn;
1695 u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_ESTABLISHED_PHASE_N_NEXT;
1703 n_left_to_next -= 1;
1705 b0 = vlib_get_buffer (vm, bi0);
1707 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1710 if (PREDICT_FALSE (sctp_conn == 0))
1713 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1714 error0 = SCTP_ERROR_INVALID_CONNECTION;
1719 ip4_hdr = vlib_buffer_get_current (b0);
1720 sctp_hdr = ip4_next_header (ip4_hdr);
1724 ip6_hdr = vlib_buffer_get_current (b0);
1725 sctp_hdr = ip6_next_header (ip6_hdr);
1728 idx = sctp_pick_conn_idx_on_state (sctp_conn->state);
1730 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1732 transport_connection_t *trans_conn =
1733 &sctp_conn->sub_conn[idx].connection;
1735 trans_conn->lcl_port = sctp_hdr->dst_port;
1736 trans_conn->rmt_port = sctp_hdr->src_port;
1737 trans_conn->is_ip4 = is_ip4;
1739 sctp_conn->sub_conn[idx].parent = sctp_conn;
1743 trans_conn->lcl_ip.ip4.as_u32 = ip4_hdr->dst_address.as_u32;
1744 trans_conn->rmt_ip.ip4.as_u32 = ip4_hdr->src_address.as_u32;
1748 clib_memcpy (&trans_conn->lcl_ip.ip6, &ip6_hdr->dst_address,
1749 sizeof (ip6_address_t));
1750 clib_memcpy (&trans_conn->rmt_ip.ip6, &ip6_hdr->src_address,
1751 sizeof (ip6_address_t));
1755 (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
1757 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
1763 sctp_handle_cookie_echo (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1765 next0 = sctp_next_output (is_ip4);
1770 sctp_handle_cookie_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1772 next0 = sctp_next_output (is_ip4);
1777 sctp_handle_sack ((sctp_selective_ack_chunk_t *) sctp_hdr,
1778 sctp_conn, idx, b0, &next0);
1783 sctp_handle_heartbeat ((sctp_hb_req_chunk_t *) sctp_hdr,
1784 sctp_conn, idx, b0, &next0);
1789 sctp_handle_heartbeat_ack ((sctp_hb_ack_chunk_t *) sctp_hdr,
1790 sctp_conn, idx, b0, &next0);
1795 sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
1796 sctp_conn, b0, &next0);
1799 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1800 * are handled by the input-dispatcher function using the table-lookup
1801 * hence we should never get to the "default" case below.
1804 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1805 next0 = SCTP_NEXT_DROP;
1810 b0->error = node->errors[error0];
1811 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1813 sctp_rx_trace_t *t0 =
1814 vlib_add_trace (vm, node, b0, sizeof (*t0));
1815 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
1818 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1819 n_left_to_next, bi0, next0);
1822 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1825 errors = session_manager_flush_enqueue_events (TRANSPORT_PROTO_SCTP,
1828 sctp_node_inc_counter (vm, is_ip4, sctp4_established_phase_node.index,
1829 sctp6_established_phase_node.index,
1830 SCTP_ERROR_EVENT_FIFO_FULL, errors);
1831 sctp_flush_frame_to_output (vm, my_thread_index, is_ip4);
1833 return from_frame->n_vectors;
1837 sctp4_established_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1838 vlib_frame_t * from_frame)
1840 return sctp46_established_phase_inline (vm, node, from_frame,
1845 sctp6_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 format_sctp_rx_trace (u8 * s, va_list * args)
1855 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1856 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1857 sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
1858 u32 indent = format_get_indent (s);
1860 s = format (s, "%U\n%U%U",
1861 format_sctp_header, &t->sctp_header, 128,
1862 format_white_space, indent,
1863 format_sctp_connection, &t->sctp_connection, 1);
1869 VLIB_REGISTER_NODE (sctp4_listen_phase_node) =
1871 .function = sctp4_listen_phase,
1872 .name = "sctp4-listen",
1873 /* Takes a vector of packets. */
1874 .vector_size = sizeof (u32),
1875 .n_errors = SCTP_N_ERROR,
1876 .error_strings = sctp_error_strings,
1877 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
1880 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
1881 foreach_sctp_state_next
1884 .format_trace = format_sctp_rx_trace_short,
1888 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_listen_phase_node, sctp4_listen_phase);
1891 VLIB_REGISTER_NODE (sctp6_listen_phase_node) =
1893 .function = sctp6_listen_phase,
1894 .name = "sctp6-listen",
1895 /* Takes a vector of packets. */
1896 .vector_size = sizeof (u32),
1897 .n_errors = SCTP_N_ERROR,
1898 .error_strings = sctp_error_strings,
1899 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
1902 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
1903 foreach_sctp_state_next
1906 .format_trace = format_sctp_rx_trace_short,
1910 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_listen_phase_node, sctp6_listen_phase);
1913 VLIB_REGISTER_NODE (sctp4_established_phase_node) =
1915 .function = sctp4_established_phase,
1916 .name = "sctp4-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_ESTABLISHED_PHASE_N_NEXT,
1924 #define _(s,n) [SCTP_ESTABLISHED_PHASE_NEXT_##s] = n,
1925 foreach_sctp_state_next
1928 .format_trace = format_sctp_rx_trace_short,
1932 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_established_phase_node,
1933 sctp4_established_phase);
1936 VLIB_REGISTER_NODE (sctp6_established_phase_node) =
1938 .function = sctp6_established_phase,
1939 .name = "sctp6-established",
1940 /* Takes a vector of packets. */
1941 .vector_size = sizeof (u32),
1942 .n_errors = SCTP_N_ERROR,
1943 .error_strings = sctp_error_strings,
1944 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
1947 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
1948 foreach_sctp_state_next
1951 .format_trace = format_sctp_rx_trace_short,
1955 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_established_phase_node,
1956 sctp6_established_phase);
1959 * This is the function executed first for the SCTP graph.
1960 * It takes care of doing the initial message parsing and
1961 * dispatch to the specialized function.
1964 sctp46_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
1965 vlib_frame_t * from_frame, int is_ip4)
1967 u32 n_left_from, next_index, *from, *to_next;
1968 u32 my_thread_index = vm->thread_index;
1970 sctp_main_t *tm = vnet_get_sctp_main ();
1972 from = vlib_frame_vector_args (from_frame);
1973 n_left_from = from_frame->n_vectors;
1974 next_index = node->cached_next_index;
1975 sctp_set_time_now (my_thread_index);
1977 while (n_left_from > 0)
1981 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1983 while (n_left_from > 0 && n_left_to_next > 0)
1985 int n_advance_bytes0, n_data_bytes0;
1986 u32 bi0, fib_index0;
1988 sctp_header_t *sctp_hdr = 0;
1989 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1990 sctp_connection_t *sctp_conn;
1991 transport_connection_t *trans_conn;
1992 ip4_header_t *ip4_hdr;
1993 ip6_header_t *ip6_hdr;
1994 u32 error0 = SCTP_ERROR_NO_LISTENER, next0 = SCTP_INPUT_NEXT_DROP;
2001 n_left_to_next -= 1;
2003 b0 = vlib_get_buffer (vm, bi0);
2004 vnet_buffer (b0)->tcp.flags = 0;
2005 fib_index0 = vnet_buffer (b0)->ip.fib_index;
2007 /* Checksum computed by ipx_local no need to compute again */
2011 ip4_hdr = vlib_buffer_get_current (b0);
2012 sctp_hdr = ip4_next_header (ip4_hdr);
2014 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
2015 sctp_chunk_hdr = &full_hdr->common_hdr;
2018 (ip4_header_bytes (ip4_hdr) +
2019 sizeof (sctp_payload_data_chunk_t));
2021 clib_net_to_host_u16 (ip4_hdr->length) - n_advance_bytes0;
2023 trans_conn = session_lookup_connection_wt4 (fib_index0,
2024 &ip4_hdr->dst_address,
2025 &ip4_hdr->src_address,
2028 TRANSPORT_PROTO_SCTP,
2034 ip6_hdr = vlib_buffer_get_current (b0);
2035 sctp_hdr = ip6_next_header (ip6_hdr);
2037 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
2038 sctp_chunk_hdr = &full_hdr->common_hdr;
2040 n_advance_bytes0 = sctp_header_bytes ();
2042 clib_net_to_host_u16 (ip6_hdr->payload_length) -
2044 n_advance_bytes0 += sizeof (ip6_hdr[0]);
2046 trans_conn = session_lookup_connection_wt6 (fib_index0,
2047 &ip6_hdr->dst_address,
2048 &ip6_hdr->src_address,
2051 TRANSPORT_PROTO_SCTP,
2057 if (PREDICT_FALSE (n_advance_bytes0 < 0))
2059 error0 = SCTP_ERROR_LENGTH;
2063 sctp_conn = sctp_get_connection_from_transport (trans_conn);
2064 vnet_sctp_common_hdr_params_net_to_host (sctp_chunk_hdr);
2066 u8 type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
2068 #if SCTP_DEBUG_STATE_MACHINE
2069 u8 idx = sctp_pick_conn_idx_on_state (sctp_conn->state);
2071 vnet_buffer (b0)->sctp.hdr_offset =
2072 (u8 *) sctp_hdr - (u8 *) vlib_buffer_get_current (b0);
2074 /* Session exists */
2075 if (PREDICT_TRUE (0 != sctp_conn))
2077 /* Save connection index */
2078 vnet_buffer (b0)->sctp.connection_index = trans_conn->c_index;
2079 vnet_buffer (b0)->sctp.data_offset = n_advance_bytes0;
2080 vnet_buffer (b0)->sctp.data_len = n_data_bytes0;
2082 next0 = tm->dispatch_table[sctp_conn->state][type].next;
2083 error0 = tm->dispatch_table[sctp_conn->state][type].error;
2085 SCTP_DBG_STATE_MACHINE ("CONNECTION_INDEX = %u: "
2086 "CURRENT_CONNECTION_STATE = %s,"
2087 "CHUNK_TYPE_RECEIVED = %s "
2090 [idx].connection.c_index,
2091 sctp_state_to_string (sctp_conn->state),
2092 sctp_chunk_to_string (type),
2093 phase_to_string (next0));
2096 SCTP_ADV_DBG ("n_advance_bytes0 = %u, n_data_bytes0 = %u",
2097 n_advance_bytes0, n_data_bytes0);
2104 next0 = SCTP_INPUT_NEXT_DROP;
2105 error0 = SCTP_ERROR_FILTERED;
2107 else if ((is_ip4 && tm->punt_unknown4) ||
2108 (!is_ip4 && tm->punt_unknown6))
2110 next0 = SCTP_INPUT_NEXT_PUNT_PHASE;
2111 error0 = SCTP_ERROR_PUNT;
2115 next0 = SCTP_INPUT_NEXT_DROP;
2116 error0 = SCTP_ERROR_NO_LISTENER;
2118 SCTP_DBG_STATE_MACHINE ("sctp_conn == NULL, NEXT_PHASE = %s",
2119 phase_to_string (next0));
2124 b0->error = error0 ? node->errors[error0] : 0;
2126 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2128 sctp_rx_trace_t *t0 =
2129 vlib_add_trace (vm, node, b0, sizeof (*t0));
2130 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
2132 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2133 n_left_to_next, bi0, next0);
2136 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2138 return from_frame->n_vectors;
2142 sctp4_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2143 vlib_frame_t * from_frame)
2145 return sctp46_input_dispatcher (vm, node, from_frame, 1 /* is_ip4 */ );
2149 sctp6_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2150 vlib_frame_t * from_frame)
2152 return sctp46_input_dispatcher (vm, node, from_frame, 0 /* is_ip4 */ );
2156 VLIB_REGISTER_NODE (sctp4_input_node) =
2158 .function = sctp4_input_dispatcher,
2159 .name = "sctp4-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_sctp4_input_next
2171 .format_buffer = format_sctp_header,
2172 .format_trace = format_sctp_rx_trace,
2176 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_input_node, sctp4_input_dispatcher);
2179 VLIB_REGISTER_NODE (sctp6_input_node) =
2181 .function = sctp6_input_dispatcher,
2182 .name = "sctp6-input",
2183 /* Takes a vector of packets. */
2184 .vector_size = sizeof (u32),
2185 .n_errors = SCTP_N_ERROR,
2186 .error_strings = sctp_error_strings,
2187 .n_next_nodes = SCTP_INPUT_N_NEXT,
2190 #define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
2191 foreach_sctp6_input_next
2194 .format_buffer = format_sctp_header,
2195 .format_trace = format_sctp_rx_trace,
2199 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_input_node, sctp6_input_dispatcher);
2201 vlib_node_registration_t sctp4_input_node;
2202 vlib_node_registration_t sctp6_input_node;
2205 sctp_dispatch_table_init (sctp_main_t * tm)
2208 for (i = 0; i < ARRAY_LEN (tm->dispatch_table); i++)
2209 for (j = 0; j < ARRAY_LEN (tm->dispatch_table[i]); j++)
2211 tm->dispatch_table[i][j].next = SCTP_INPUT_NEXT_DROP;
2212 tm->dispatch_table[i][j].error = SCTP_ERROR_DISPATCH;
2215 #define _(t,f,n,e) \
2217 tm->dispatch_table[SCTP_STATE_##t][f].next = (n); \
2218 tm->dispatch_table[SCTP_STATE_##t][f].error = (e); \
2222 * SCTP STATE-MACHINE states:
2224 * _(CLOSED, "CLOSED") \
2225 * _(COOKIE_WAIT, "COOKIE_WAIT") \
2226 * _(COOKIE_ECHOED, "COOKIE_ECHOED") \
2227 * _(ESTABLISHED, "ESTABLISHED") \
2228 * _(SHUTDOWN_PENDING, "SHUTDOWN_PENDING") \
2229 * _(SHUTDOWN_SENT, "SHUTDOWN_SENT") \
2230 * _(SHUTDOWN_RECEIVED, "SHUTDOWN_RECEIVED") \
2231 * _(SHUTDOWN_ACK_SENT, "SHUTDOWN_ACK_SENT")
2233 _(CLOSED, DATA, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */
2234 _(CLOSED, INIT, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2235 _(CLOSED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2236 _(CLOSED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2237 _(CLOSED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2238 _(CLOSED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2239 _(CLOSED, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2240 _(CLOSED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2241 _(CLOSED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2242 _(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2243 _(CLOSED, COOKIE_ECHO, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2244 _(CLOSED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2245 _(CLOSED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2246 _(CLOSED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2247 _(CLOSED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2249 _(COOKIE_WAIT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE);
2250 _(COOKIE_WAIT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2251 _(COOKIE_WAIT, INIT_ACK, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2252 _(COOKIE_WAIT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2253 _(COOKIE_WAIT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2254 _(COOKIE_WAIT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2255 _(COOKIE_WAIT, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2256 _(COOKIE_WAIT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2257 _(COOKIE_WAIT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2258 _(COOKIE_WAIT, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2259 _(COOKIE_WAIT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2260 _(COOKIE_WAIT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2261 _(COOKIE_WAIT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2262 _(COOKIE_WAIT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2263 _(COOKIE_WAIT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2265 _(COOKIE_ECHOED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE);
2266 _(COOKIE_ECHOED, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2267 _(COOKIE_ECHOED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2268 _(COOKIE_ECHOED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2269 _(COOKIE_ECHOED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2270 _(COOKIE_ECHOED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2271 _(COOKIE_ECHOED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2272 _(COOKIE_ECHOED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2273 _(COOKIE_ECHOED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2274 _(COOKIE_ECHOED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2275 _(COOKIE_ECHOED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2276 _(COOKIE_ECHOED, COOKIE_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2278 _(COOKIE_ECHOED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2279 _(COOKIE_ECHOED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2280 _(COOKIE_ECHOED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2282 _(ESTABLISHED, DATA, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2283 _(ESTABLISHED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2284 _(ESTABLISHED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2285 _(ESTABLISHED, SACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2286 _(ESTABLISHED, HEARTBEAT, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2288 _(ESTABLISHED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2290 _(ESTABLISHED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2291 _(ESTABLISHED, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2292 _(ESTABLISHED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2293 _(ESTABLISHED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2294 _(ESTABLISHED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2295 _(ESTABLISHED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2296 _(ESTABLISHED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2297 _(ESTABLISHED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2298 _(ESTABLISHED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2300 _(SHUTDOWN_PENDING, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2301 _(SHUTDOWN_PENDING, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2302 _(SHUTDOWN_PENDING, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2303 _(SHUTDOWN_PENDING, SACK, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2304 _(SHUTDOWN_PENDING, HEARTBEAT, SCTP_INPUT_NEXT_LISTEN_PHASE,
2306 _(SHUTDOWN_PENDING, HEARTBEAT_ACK, SCTP_INPUT_NEXT_LISTEN_PHASE,
2308 _(SHUTDOWN_PENDING, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2309 _(SHUTDOWN_PENDING, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2311 _(SHUTDOWN_PENDING, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2312 _(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2313 _(SHUTDOWN_PENDING, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2314 _(SHUTDOWN_PENDING, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2315 _(SHUTDOWN_PENDING, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2316 _(SHUTDOWN_PENDING, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2317 _(SHUTDOWN_PENDING, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2319 _(SHUTDOWN_SENT, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2320 _(SHUTDOWN_SENT, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2321 _(SHUTDOWN_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2322 _(SHUTDOWN_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2323 _(SHUTDOWN_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2324 _(SHUTDOWN_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2325 _(SHUTDOWN_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2326 _(SHUTDOWN_SENT, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2327 _(SHUTDOWN_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2329 _(SHUTDOWN_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2330 _(SHUTDOWN_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2331 _(SHUTDOWN_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2332 _(SHUTDOWN_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2333 _(SHUTDOWN_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2335 _(SHUTDOWN_RECEIVED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2336 _(SHUTDOWN_RECEIVED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2337 _(SHUTDOWN_RECEIVED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2338 _(SHUTDOWN_RECEIVED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2339 _(SHUTDOWN_RECEIVED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2340 _(SHUTDOWN_RECEIVED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2341 _(SHUTDOWN_RECEIVED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2342 _(SHUTDOWN_RECEIVED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2343 _(SHUTDOWN_RECEIVED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2345 _(SHUTDOWN_RECEIVED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2346 _(SHUTDOWN_RECEIVED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2347 _(SHUTDOWN_RECEIVED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2348 _(SHUTDOWN_RECEIVED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2349 _(SHUTDOWN_RECEIVED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2351 _(SHUTDOWN_ACK_SENT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2352 _(SHUTDOWN_ACK_SENT, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2353 _(SHUTDOWN_ACK_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2354 _(SHUTDOWN_ACK_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2355 _(SHUTDOWN_ACK_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2356 _(SHUTDOWN_ACK_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2357 _(SHUTDOWN_ACK_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2358 _(SHUTDOWN_ACK_SENT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2359 _(SHUTDOWN_ACK_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2360 _(SHUTDOWN_ACK_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2361 _(SHUTDOWN_ACK_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2362 _(SHUTDOWN_ACK_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2363 _(SHUTDOWN_ACK_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2364 _(SHUTDOWN_ACK_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2367 /* TODO: Handle COOKIE ECHO when a TCB Exists */
2373 sctp_input_init (vlib_main_t * vm)
2375 clib_error_t *error = 0;
2376 sctp_main_t *tm = vnet_get_sctp_main ();
2378 if ((error = vlib_call_init_function (vm, sctp_init)))
2381 /* Initialize dispatch table. */
2382 sctp_dispatch_table_init (tm);
2387 VLIB_INIT_FUNCTION (sctp_input_init);
2390 * fd.io coding-style-patch-verification: ON
2393 * eval: (c-set-style "gnu")