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 _ (DROP4, "ip4-drop") \
31 _ (DROP6, "ip6-drop") \
32 _ (SCTP4_OUTPUT, "sctp4-output") \
33 _ (SCTP6_OUTPUT, "sctp6-output")
35 typedef enum _sctp_established_phase_next
37 #define _(s,n) SCTP_ESTABLISHED_PHASE_NEXT_##s,
38 foreach_sctp_state_next
40 SCTP_ESTABLISHED_PHASE_N_NEXT,
41 } sctp_established_phase_next_t;
43 typedef enum _sctp_rcv_phase_next
45 #define _(s,n) SCTP_RCV_PHASE_NEXT_##s,
46 foreach_sctp_state_next
48 SCTP_RCV_PHASE_N_NEXT,
49 } sctp_rcv_phase_next_t;
51 typedef enum _sctp_listen_phase_next
53 #define _(s,n) SCTP_LISTEN_PHASE_NEXT_##s,
54 foreach_sctp_state_next
56 SCTP_LISTEN_PHASE_N_NEXT,
57 } sctp_listen_phase_next_t;
59 typedef enum _sctp_shutdown_phase_next
61 #define _(s,n) SCTP_SHUTDOWN_PHASE_NEXT_##s,
62 foreach_sctp_state_next
64 SCTP_SHUTDOWN_PHASE_N_NEXT,
65 } sctp_shutdown_phase_next_t;
67 /* Generic, state independent indices */
68 typedef enum _sctp_state_next
70 #define _(s,n) SCTP_NEXT_##s,
71 foreach_sctp_state_next
76 typedef enum _sctp_input_next
79 SCTP_INPUT_NEXT_LISTEN_PHASE,
80 SCTP_INPUT_NEXT_RCV_PHASE,
81 SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
82 SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
83 SCTP_INPUT_NEXT_PUNT_PHASE,
88 phase_to_string (u8 phase)
92 case SCTP_INPUT_NEXT_DROP:
93 return "SCTP_INPUT_NEXT_DROP";
94 case SCTP_INPUT_NEXT_LISTEN_PHASE:
95 return "SCTP_INPUT_NEXT_LISTEN_PHASE";
96 case SCTP_INPUT_NEXT_RCV_PHASE:
97 return "SCTP_INPUT_NEXT_RCV_PHASE";
98 case SCTP_INPUT_NEXT_ESTABLISHED_PHASE:
99 return "SCTP_INPUT_NEXT_ESTABLISHED_PHASE";
100 case SCTP_INPUT_NEXT_SHUTDOWN_PHASE:
101 return "SCTP_INPUT_NEXT_SHUTDOWN_PHASE";
102 case SCTP_INPUT_NEXT_PUNT_PHASE:
103 return "SCTP_INPUT_NEXT_PUNT_PHASE";
108 #define foreach_sctp4_input_next \
109 _ (DROP, "error-drop") \
110 _ (RCV_PHASE, "sctp4-rcv") \
111 _ (LISTEN_PHASE, "sctp4-listen") \
112 _ (ESTABLISHED_PHASE, "sctp4-established") \
113 _ (SHUTDOWN_PHASE, "sctp4-shutdown") \
114 _ (PUNT_PHASE, "ip4-punt")
117 #define foreach_sctp6_input_next \
118 _ (DROP, "error-drop") \
119 _ (RCV_PHASE, "sctp6-rcv") \
120 _ (LISTEN_PHASE, "sctp6-listen") \
121 _ (ESTABLISHED_PHASE, "sctp6-established") \
122 _ (SHUTDOWN_PHASE, "sctp6-shutdown") \
123 _ (PUNT_PHASE, "ip6-punt")
126 sctp_lookup_is_valid (transport_connection_t * trans_conn,
127 sctp_header_t * sctp_hdr)
129 sctp_connection_t *sctp_conn =
130 sctp_get_connection_from_transport (trans_conn);
135 u8 is_valid = (trans_conn->lcl_port == sctp_hdr->dst_port
136 && (sctp_conn->state == SCTP_STATE_CLOSED
137 || trans_conn->rmt_port == sctp_hdr->src_port));
143 * Lookup transport connection
145 static sctp_connection_t *
146 sctp_lookup_connection (u32 fib_index, vlib_buffer_t * b, u8 thread_index,
149 sctp_main_t *tm = vnet_get_sctp_main ();
150 sctp_header_t *sctp_hdr;
151 transport_connection_t *trans_conn;
152 sctp_connection_t *sctp_conn;
156 ip4_header_t *ip4_hdr;
157 ip4_hdr = vlib_buffer_get_current (b);
158 sctp_hdr = ip4_next_header (ip4_hdr);
159 trans_conn = session_lookup_connection_wt4 (fib_index,
160 &ip4_hdr->dst_address,
161 &ip4_hdr->src_address,
164 TRANSPORT_PROTO_SCTP,
165 thread_index, &is_filtered);
166 if (trans_conn == 0) /* Not primary connection */
168 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
170 if ((tm->connections[thread_index]->sub_conn[i].
171 connection.lcl_ip.ip4.as_u32 ==
172 ip4_hdr->dst_address.as_u32)
173 && (tm->connections[thread_index]->sub_conn[i].
174 connection.rmt_ip.ip4.as_u32 ==
175 ip4_hdr->src_address.as_u32))
178 &tm->connections[thread_index]->sub_conn[i].connection;
183 ASSERT (trans_conn != 0);
184 ASSERT (sctp_lookup_is_valid (trans_conn, sctp_hdr));
188 ip6_header_t *ip6_hdr;
189 ip6_hdr = vlib_buffer_get_current (b);
190 sctp_hdr = ip6_next_header (ip6_hdr);
191 trans_conn = session_lookup_connection_wt6 (fib_index,
192 &ip6_hdr->dst_address,
193 &ip6_hdr->src_address,
196 TRANSPORT_PROTO_SCTP,
197 thread_index, &is_filtered);
198 if (trans_conn == 0) /* Not primary connection */
200 for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
202 if ((tm->connections[thread_index]->sub_conn[i].
203 connection.lcl_ip.ip6.as_u64[0] ==
204 ip6_hdr->dst_address.as_u64[0]
205 && tm->connections[thread_index]->sub_conn[i].
206 connection.lcl_ip.ip6.as_u64[1] ==
207 ip6_hdr->dst_address.as_u64[1])
208 && (tm->connections[thread_index]->sub_conn[i].
209 connection.rmt_ip.ip6.as_u64[0] ==
210 ip6_hdr->src_address.as_u64[0]
211 && tm->connections[thread_index]->
212 sub_conn[i].connection.rmt_ip.ip6.as_u64[1] ==
213 ip6_hdr->src_address.as_u64[1]))
216 &tm->connections[thread_index]->sub_conn[i].connection;
221 ASSERT (trans_conn != 0);
222 ASSERT (sctp_lookup_is_valid (trans_conn, sctp_hdr));
224 sctp_conn = sctp_get_connection_from_transport (trans_conn);
230 sctp_header_t sctp_header;
231 sctp_connection_t sctp_connection;
234 #define sctp_next_output(is_ip4) (is_ip4 ? SCTP_NEXT_SCTP4_OUTPUT \
235 : SCTP_NEXT_SCTP6_OUTPUT)
237 #define sctp_next_drop(is_ip4) (is_ip4 ? SCTP_NEXT_DROP4 \
241 sctp_set_rx_trace_data (sctp_rx_trace_t * rx_trace,
242 sctp_connection_t * sctp_conn,
243 sctp_header_t * sctp_hdr, vlib_buffer_t * b0,
248 clib_memcpy (&rx_trace->sctp_connection, sctp_conn,
249 sizeof (rx_trace->sctp_connection));
253 sctp_hdr = sctp_buffer_hdr (b0);
255 clib_memcpy (&rx_trace->sctp_header, sctp_hdr,
256 sizeof (rx_trace->sctp_header));
260 sctp_calculate_implied_length (ip4_header_t * ip4_hdr, ip6_header_t * ip6_hdr,
263 u16 sctp_implied_packet_length = 0;
266 sctp_implied_packet_length =
267 clib_net_to_host_u16 (ip4_hdr->length) - ip4_header_bytes (ip4_hdr);
269 sctp_implied_packet_length =
270 clib_net_to_host_u16 (ip6_hdr->payload_length) - sizeof (ip6_hdr);
272 return sctp_implied_packet_length;
276 sctp_is_bundling (u16 sctp_implied_length,
277 sctp_chunks_common_hdr_t * sctp_common_hdr)
279 if (sctp_implied_length !=
280 sizeof (sctp_header_t) + vnet_sctp_get_chunk_length (sctp_common_hdr))
286 sctp_handle_operation_err (sctp_header_t * sctp_hdr,
287 sctp_connection_t * sctp_conn, u8 idx,
288 vlib_buffer_t * b, u16 * next0)
290 sctp_operation_error_t *op_err = (sctp_operation_error_t *) sctp_hdr;
292 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
293 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
295 return SCTP_ERROR_INVALID_TAG;
298 if (clib_net_to_host_u16 (op_err->err_causes[0].param_hdr.type) ==
301 if (sctp_conn->state != SCTP_STATE_COOKIE_ECHOED)
302 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
305 sctp_connection_cleanup (sctp_conn);
307 stream_session_disconnect_notify (&sctp_conn->
308 sub_conn[idx].connection);
312 return SCTP_ERROR_NONE;
316 sctp_handle_init (sctp_header_t * sctp_hdr,
317 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
318 sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
319 u16 sctp_implied_length)
321 sctp_init_chunk_t *init_chunk = (sctp_init_chunk_t *) (sctp_hdr);
322 ip4_address_t *ip4_addr = 0;
323 ip6_address_t *ip6_addr = 0;
324 char hostname[FQDN_MAX_LENGTH];
326 /* Check the current state of the connection
328 * The logic required by the RFC4960 Section 5.2.2 is already taken care of
329 * in the code below and by the "sctp_prepare_initack_chunk" function.
330 * However, for debugging purposes it is nice to have a message printed out
331 * for these corner-case scenarios.
333 if (sctp_conn->state != SCTP_STATE_CLOSED)
334 { /* UNEXPECTED scenario */
335 switch (sctp_conn->state)
337 case SCTP_STATE_COOKIE_WAIT:
338 SCTP_ADV_DBG ("Received INIT chunk while in COOKIE_WAIT state");
339 sctp_prepare_initack_chunk_for_collision (sctp_conn,
340 SCTP_PRIMARY_PATH_IDX,
341 b0, ip4_addr, ip6_addr);
342 return SCTP_ERROR_NONE;
343 case SCTP_STATE_COOKIE_ECHOED:
344 case SCTP_STATE_SHUTDOWN_ACK_SENT:
345 SCTP_ADV_DBG ("Received INIT chunk while in COOKIE_ECHOED state");
346 if (sctp_conn->forming_association_changed == 0)
347 sctp_prepare_initack_chunk_for_collision (sctp_conn,
348 SCTP_PRIMARY_PATH_IDX,
349 b0, ip4_addr, ip6_addr);
351 sctp_prepare_abort_for_collision (sctp_conn,
352 SCTP_PRIMARY_PATH_IDX, b0,
354 return SCTP_ERROR_NONE;
358 if (sctp_hdr->verification_tag != 0x0)
359 return SCTP_ERROR_INVALID_TAG_FOR_INIT;
362 * It is not possible to bundle any other CHUNK with the INIT chunk
364 if (sctp_is_bundling (sctp_implied_length, &init_chunk->chunk_hdr))
365 return SCTP_ERROR_BUNDLING_VIOLATION;
367 /* Save the INITIATE_TAG of the remote peer for this connection:
368 * it MUST be used for the VERIFICATION_TAG parameter in the SCTP HEADER */
369 sctp_conn->remote_tag = init_chunk->initiate_tag;
370 sctp_conn->remote_initial_tsn =
371 clib_net_to_host_u32 (init_chunk->initial_tsn);
372 sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn;
373 sctp_conn->next_tsn_expected = sctp_conn->remote_initial_tsn + 1;
374 SCTP_CONN_TRACKING_DBG ("sctp_conn->remote_initial_tsn = %u",
375 sctp_conn->remote_initial_tsn);
377 sctp_conn->peer_rwnd = clib_net_to_host_u32 (init_chunk->a_rwnd);
380 * If the length specified in the INIT message is bigger than the size in bytes of our structure it means that
381 * optional parameters have been sent with the INIT chunk and we need to parse them.
383 u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr);
384 if (length > sizeof (sctp_init_chunk_t))
386 /* There are optional parameters in the INIT chunk */
387 u16 pointer_offset = sizeof (sctp_init_chunk_t);
388 while (pointer_offset < length)
390 sctp_opt_params_hdr_t *opt_params_hdr =
391 (sctp_opt_params_hdr_t *) init_chunk + pointer_offset;
393 switch (clib_net_to_host_u16 (opt_params_hdr->type))
395 case SCTP_IPV4_ADDRESS_TYPE:
397 sctp_ipv4_addr_param_t *ipv4 =
398 (sctp_ipv4_addr_param_t *) opt_params_hdr;
399 clib_memcpy (ip4_addr, &ipv4->address,
400 sizeof (ip4_address_t));
402 sctp_sub_connection_add_ip4 (vlib_get_main (),
404 [SCTP_PRIMARY_PATH_IDX].connection.
405 lcl_ip.ip4, &ipv4->address);
409 case SCTP_IPV6_ADDRESS_TYPE:
411 sctp_ipv6_addr_param_t *ipv6 =
412 (sctp_ipv6_addr_param_t *) opt_params_hdr;
413 clib_memcpy (ip6_addr, &ipv6->address,
414 sizeof (ip6_address_t));
416 sctp_sub_connection_add_ip6 (vlib_get_main (),
418 [SCTP_PRIMARY_PATH_IDX].connection.
419 lcl_ip.ip6, &ipv6->address);
423 case SCTP_COOKIE_PRESERVATIVE_TYPE:
425 sctp_cookie_preservative_param_t *cookie_pres =
426 (sctp_cookie_preservative_param_t *) opt_params_hdr;
427 sctp_conn->peer_cookie_life_span_increment =
428 cookie_pres->life_span_inc;
431 case SCTP_HOSTNAME_ADDRESS_TYPE:
433 sctp_hostname_param_t *hostname_addr =
434 (sctp_hostname_param_t *) opt_params_hdr;
435 clib_memcpy (hostname, hostname_addr->hostname,
439 case SCTP_SUPPORTED_ADDRESS_TYPES:
445 pointer_offset += clib_net_to_host_u16 (opt_params_hdr->length);
449 /* Reuse buffer to make init-ack and send */
450 sctp_prepare_initack_chunk (sctp_conn, SCTP_PRIMARY_PATH_IDX, b0, ip4_addr,
452 return SCTP_ERROR_NONE;
456 sctp_is_valid_init_ack (sctp_header_t * sctp_hdr,
457 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
458 sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
459 u16 sctp_implied_length)
461 sctp_init_ack_chunk_t *init_ack_chunk =
462 (sctp_init_ack_chunk_t *) (sctp_hdr);
464 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
465 if (sctp_conn->local_tag != init_ack_chunk->sctp_hdr.verification_tag)
467 return SCTP_ERROR_INVALID_TAG;
471 * It is not possible to bundle any other CHUNK with the INIT_ACK chunk
473 if (sctp_is_bundling (sctp_implied_length, &init_ack_chunk->chunk_hdr))
474 return SCTP_ERROR_BUNDLING_VIOLATION;
476 return SCTP_ERROR_NONE;
480 sctp_handle_init_ack (sctp_header_t * sctp_hdr,
481 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
482 sctp_connection_t * sctp_conn, u8 idx,
483 vlib_buffer_t * b0, u16 sctp_implied_length)
485 sctp_init_ack_chunk_t *init_ack_chunk =
486 (sctp_init_ack_chunk_t *) (sctp_hdr);
487 sctp_state_cookie_param_t state_cookie;
489 char hostname[FQDN_MAX_LENGTH];
491 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
492 if (sctp_conn->local_tag != init_ack_chunk->sctp_hdr.verification_tag)
494 return SCTP_ERROR_INVALID_TAG;
498 * It is not possible to bundle any other CHUNK with the INIT chunk
500 if (sctp_is_bundling (sctp_implied_length, &init_ack_chunk->chunk_hdr))
501 return SCTP_ERROR_BUNDLING_VIOLATION;
503 /* Stop the T1_INIT timer */
504 sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T1_INIT);
506 sctp_calculate_rto (sctp_conn, idx);
508 /* remote_tag to be placed in the VERIFICATION_TAG field of the COOKIE_ECHO chunk */
509 sctp_conn->remote_tag = init_ack_chunk->initiate_tag;
510 sctp_conn->remote_initial_tsn =
511 clib_net_to_host_u32 (init_ack_chunk->initial_tsn);
512 sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn;
513 sctp_conn->next_tsn_expected = sctp_conn->remote_initial_tsn + 1;
514 SCTP_CONN_TRACKING_DBG ("sctp_conn->remote_initial_tsn = %u",
515 sctp_conn->remote_initial_tsn);
516 sctp_conn->peer_rwnd = clib_net_to_host_u32 (init_ack_chunk->a_rwnd);
518 u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr);
520 if (length > sizeof (sctp_init_ack_chunk_t))
522 * There are optional parameters in the INIT ACK chunk
525 u16 pointer_offset = sizeof (sctp_init_ack_chunk_t);
527 while (pointer_offset < length)
529 sctp_opt_params_hdr_t *opt_params_hdr =
530 (sctp_opt_params_hdr_t *) ((char *) init_ack_chunk +
533 switch (clib_net_to_host_u16 (opt_params_hdr->type))
535 case SCTP_IPV4_ADDRESS_TYPE:
537 sctp_ipv4_addr_param_t *ipv4 =
538 (sctp_ipv4_addr_param_t *) opt_params_hdr;
540 sctp_sub_connection_add_ip4 (vlib_get_main (),
542 [SCTP_PRIMARY_PATH_IDX].connection.
543 lcl_ip.ip4, &ipv4->address);
547 case SCTP_IPV6_ADDRESS_TYPE:
549 sctp_ipv6_addr_param_t *ipv6 =
550 (sctp_ipv6_addr_param_t *) opt_params_hdr;
552 sctp_sub_connection_add_ip6 (vlib_get_main (),
554 [SCTP_PRIMARY_PATH_IDX].connection.
555 lcl_ip.ip6, &ipv6->address);
559 case SCTP_STATE_COOKIE_TYPE:
561 sctp_state_cookie_param_t *state_cookie_param =
562 (sctp_state_cookie_param_t *) opt_params_hdr;
564 clib_memcpy (&state_cookie, state_cookie_param,
565 sizeof (sctp_state_cookie_param_t));
568 case SCTP_HOSTNAME_ADDRESS_TYPE:
570 sctp_hostname_param_t *hostname_addr =
571 (sctp_hostname_param_t *) opt_params_hdr;
572 clib_memcpy (hostname, hostname_addr->hostname,
576 case SCTP_UNRECOGNIZED_TYPE:
581 u16 increment = clib_net_to_host_u16 (opt_params_hdr->length);
582 /* This indicates something really bad happened */
585 return SCTP_ERROR_INVALID_TAG;
587 pointer_offset += increment;
591 clib_memcpy (&(sctp_conn->cookie_param), &state_cookie,
592 sizeof (sctp_state_cookie_param_t));
594 sctp_prepare_cookie_echo_chunk (sctp_conn, idx, b0, 1);
596 /* Start the T1_COOKIE timer */
597 sctp_timer_set (sctp_conn, idx,
598 SCTP_TIMER_T1_COOKIE, sctp_conn->sub_conn[idx].RTO);
600 return SCTP_ERROR_NONE;
603 /** Enqueue data out-of-order for delivery to application */
605 sctp_session_enqueue_data_ooo (sctp_connection_t * sctp_conn,
606 vlib_buffer_t * b, u16 data_len, u8 conn_idx)
608 int written, error = SCTP_ERROR_ENQUEUED;
611 session_enqueue_stream_connection (&sctp_conn->
612 sub_conn[conn_idx].connection, b, 0,
613 1 /* queue event */ ,
616 /* Update next_tsn_expected */
617 if (PREDICT_TRUE (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 /* If more data written than expected, account for out-of-order bytes. */
626 else if (written > data_len)
628 sctp_conn->next_tsn_expected += written;
630 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
631 sctp_conn->sub_conn[conn_idx].connection.c_index,
634 else if (written > 0)
636 /* We've written something but FIFO is probably full now */
637 sctp_conn->next_tsn_expected += written;
639 error = SCTP_ERROR_PARTIALLY_ENQUEUED;
642 ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
643 sctp_conn->sub_conn[conn_idx].connection.c_index, written);
647 SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
648 sctp_conn->sub_conn[conn_idx].connection.c_index);
650 return SCTP_ERROR_FIFO_FULL;
653 /* TODO: Update out_of_order_map & SACK list */
658 /** Enqueue data for delivery to application */
660 sctp_session_enqueue_data (sctp_connection_t * sctp_conn, vlib_buffer_t * b,
661 u16 data_len, u8 conn_idx)
663 int written, error = SCTP_ERROR_ENQUEUED;
666 session_enqueue_stream_connection (&sctp_conn->
667 sub_conn[conn_idx].connection, b, 0,
668 1 /* queue event */ ,
671 /* Update next_tsn_expected */
672 if (PREDICT_TRUE (written == data_len))
674 sctp_conn->next_tsn_expected += written;
676 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
677 sctp_conn->sub_conn[conn_idx].connection.c_index,
680 /* If more data written than expected, account for out-of-order bytes. */
681 else if (written > data_len)
683 sctp_conn->next_tsn_expected += written;
685 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
686 sctp_conn->sub_conn[conn_idx].connection.c_index,
689 else if (written > 0)
691 /* We've written something but FIFO is probably full now */
692 sctp_conn->next_tsn_expected += written;
694 error = SCTP_ERROR_PARTIALLY_ENQUEUED;
697 ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
698 sctp_conn->sub_conn[conn_idx].connection.c_index, written);
702 SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
703 sctp_conn->sub_conn[conn_idx].connection.c_index);
705 return SCTP_ERROR_FIFO_FULL;
712 sctp_is_sack_delayable (sctp_connection_t * sctp_conn, u8 idx, u8 is_gapping)
714 if (sctp_conn->conn_config.never_delay_sack)
716 SCTP_CONN_TRACKING_DBG ("sctp_conn->conn_config.never_delay_sack = ON");
720 /* Section 4.4 of the RFC4960 */
721 if (sctp_conn->state == SCTP_STATE_SHUTDOWN_SENT)
723 SCTP_CONN_TRACKING_DBG ("sctp_conn->state = %s; SACK not delayable",
724 sctp_state_to_string (sctp_conn->state));
730 SCTP_CONN_TRACKING_DBG
731 ("gapping != 0: CONN_INDEX = %u, sctp_conn->ack_state = %u",
732 sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
736 if (sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS)
738 SCTP_CONN_TRACKING_DBG
739 ("sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS: CONN_INDEX = %u, sctp_conn->ack_state = %u",
740 sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
744 sctp_conn->ack_state += 1;
750 sctp_is_connection_gapping (sctp_connection_t * sctp_conn, u32 tsn,
753 if (sctp_conn->next_tsn_expected != tsn) // It means data transmission is GAPPING
755 SCTP_CONN_TRACKING_DBG
756 ("GAPPING: CONN_INDEX = %u, sctp_conn->next_tsn_expected = %u, tsn = %u, diff = %u",
757 sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.c_index,
758 sctp_conn->next_tsn_expected, tsn,
759 sctp_conn->next_tsn_expected - tsn);
766 sctp_handle_data (sctp_payload_data_chunk_t * sctp_data_chunk,
767 sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b,
770 u32 error = 0, n_data_bytes;
773 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
774 if (sctp_conn->local_tag != sctp_data_chunk->sctp_hdr.verification_tag)
776 return SCTP_ERROR_INVALID_TAG;
779 vnet_buffer (b)->sctp.sid = sctp_data_chunk->stream_id;
780 vnet_buffer (b)->sctp.ssn = sctp_data_chunk->stream_seq;
782 u32 tsn = clib_net_to_host_u32 (sctp_data_chunk->tsn);
784 vlib_buffer_advance (b, vnet_buffer (b)->sctp.data_offset);
785 n_data_bytes = vnet_buffer (b)->sctp.data_len;
786 ASSERT (n_data_bytes);
788 sctp_is_connection_gapping (sctp_conn, tsn, &is_gapping);
790 sctp_conn->last_rcvd_tsn = tsn;
792 SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
794 u8 bbit = vnet_sctp_get_bbit (&sctp_data_chunk->chunk_hdr);
795 u8 ebit = vnet_sctp_get_ebit (&sctp_data_chunk->chunk_hdr);
797 if (bbit == 1 && ebit == 1) /* Unfragmented message */
799 /* In order data, enqueue. Fifo figures out by itself if any out-of-order
800 * segments can be enqueued after fifo tail offset changes. */
801 if (PREDICT_FALSE (is_gapping == 1))
803 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
805 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
807 else if (bbit == 1 && ebit == 0) /* First piece of a fragmented user message */
809 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
811 else if (bbit == 0 && ebit == 1) /* Last piece of a fragmented user message */
813 if (PREDICT_FALSE (is_gapping == 1))
815 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
817 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
819 else /* Middle piece of a fragmented user message */
821 if (PREDICT_FALSE (is_gapping == 1))
823 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
825 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
827 sctp_conn->last_rcvd_tsn = tsn;
829 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
831 SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
833 if (!sctp_is_sack_delayable (sctp_conn, idx, is_gapping))
834 sctp_prepare_sack_chunk (sctp_conn, idx, b);
836 sctp_conn->sub_conn[idx].enqueue_state = error;
842 sctp_handle_cookie_echo (sctp_header_t * sctp_hdr,
843 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
844 sctp_connection_t * sctp_conn, u8 idx,
845 vlib_buffer_t * b0, u16 * next0)
847 u32 now = sctp_time_now ();
849 sctp_cookie_echo_chunk_t *cookie_echo =
850 (sctp_cookie_echo_chunk_t *) sctp_hdr;
852 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
853 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
855 return SCTP_ERROR_INVALID_TAG;
858 sctp_calculate_rto (sctp_conn, idx);
861 clib_net_to_host_u32 (cookie_echo->cookie.creation_time);
862 u32 cookie_lifespan =
863 clib_net_to_host_u32 (cookie_echo->cookie.cookie_lifespan);
864 if (now > creation_time + cookie_lifespan)
866 SCTP_DBG ("now (%u) > creation_time (%u) + cookie_lifespan (%u)",
867 now, creation_time, cookie_lifespan);
868 return SCTP_ERROR_COOKIE_ECHO_VIOLATION;
871 sctp_prepare_cookie_ack_chunk (sctp_conn, idx, b0);
874 sctp_conn->state = SCTP_STATE_ESTABLISHED;
875 sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_STATE_UP;
876 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
878 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
879 sctp_conn->sub_conn[idx].RTO);
881 stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
883 return SCTP_ERROR_NONE;
888 sctp_handle_cookie_ack (sctp_header_t * sctp_hdr,
889 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
890 sctp_connection_t * sctp_conn, u8 idx,
891 vlib_buffer_t * b0, u16 * next0)
893 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
894 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
896 return SCTP_ERROR_INVALID_TAG;
899 sctp_calculate_rto (sctp_conn, idx);
901 sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T1_COOKIE);
903 sctp_conn->state = SCTP_STATE_ESTABLISHED;
904 sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_STATE_UP;
906 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
908 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
909 sctp_conn->sub_conn[idx].RTO);
911 stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
913 return SCTP_ERROR_NONE;
918 sctp46_rcv_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
919 vlib_frame_t * from_frame, int is_ip4)
921 sctp_main_t *tm = vnet_get_sctp_main ();
923 u32 n_left_from, next_index, *from, *to_next;
924 u32 my_thread_index = vm->thread_index;
926 from = vlib_frame_vector_args (from_frame);
927 n_left_from = from_frame->n_vectors;
929 next_index = node->cached_next_index;
931 while (n_left_from > 0)
935 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
937 while (n_left_from > 0 && n_left_to_next > 0)
941 sctp_header_t *sctp_hdr = 0;
942 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
943 ip4_header_t *ip4_hdr = 0;
944 ip6_header_t *ip6_hdr = 0;
945 sctp_connection_t *sctp_conn, *new_sctp_conn;
946 u16 sctp_implied_length = 0;
947 u16 error0 = SCTP_ERROR_NONE, next0 = sctp_next_drop (is_ip4);
957 b0 = vlib_get_buffer (vm, bi0);
959 /* If we are in SCTP_COOKIE_WAIT_STATE then the connection
960 * will come from the half-open connections pool.
963 sctp_half_open_connection_get (vnet_buffer (b0)->
964 sctp.connection_index);
966 if (PREDICT_FALSE (sctp_conn == 0))
969 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
970 error0 = SCTP_ERROR_INVALID_CONNECTION;
975 ip4_hdr = vlib_buffer_get_current (b0);
976 sctp_hdr = ip4_next_header (ip4_hdr);
977 idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
981 ip6_hdr = vlib_buffer_get_current (b0);
982 sctp_hdr = ip6_next_header (ip6_hdr);
983 idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
986 sctp_conn->sub_conn[idx].subconn_idx = idx;
987 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
990 (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
992 sctp_implied_length =
993 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
995 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
1001 sctp_is_valid_init_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1002 b0, sctp_implied_length);
1004 if (error0 == SCTP_ERROR_NONE)
1006 pool_get (tm->connections[my_thread_index], new_sctp_conn);
1007 clib_memcpy (new_sctp_conn, sctp_conn,
1008 sizeof (*new_sctp_conn));
1009 new_sctp_conn->sub_conn[idx].c_c_index =
1010 new_sctp_conn - tm->connections[my_thread_index];
1011 new_sctp_conn->sub_conn[idx].c_thread_index =
1013 new_sctp_conn->sub_conn[idx].PMTU =
1014 sctp_conn->sub_conn[idx].PMTU;
1015 new_sctp_conn->sub_conn[idx].subconn_idx = idx;
1017 if (sctp_half_open_connection_cleanup (sctp_conn))
1020 ("Cannot cleanup half-open connection; not the owning thread");
1023 sctp_connection_timers_init (new_sctp_conn);
1026 sctp_handle_init_ack (sctp_hdr, sctp_chunk_hdr,
1027 new_sctp_conn, idx, b0,
1028 sctp_implied_length);
1030 sctp_init_cwnd (new_sctp_conn);
1032 if (session_stream_connect_notify
1033 (&new_sctp_conn->sub_conn[idx].connection, 0))
1036 ("conn_index = %u: session_stream_connect_notify error; cleaning up connection",
1037 new_sctp_conn->sub_conn[idx].connection.c_index);
1038 sctp_connection_cleanup (new_sctp_conn);
1041 next0 = sctp_next_output (is_ip4);
1045 case OPERATION_ERROR:
1047 sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0,
1051 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1052 * are handled by the input-dispatcher function using the table-lookup
1053 * hence we should never get to the "default" case below.
1056 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1057 next0 = sctp_next_drop (is_ip4);
1061 if (error0 != SCTP_ERROR_NONE)
1063 clib_warning ("error while parsing chunk");
1064 sctp_connection_cleanup (sctp_conn);
1065 next0 = sctp_next_drop (is_ip4);
1070 b0->error = node->errors[error0];
1071 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1073 sctp_rx_trace_t *t0 =
1074 vlib_add_trace (vm, node, b0, sizeof (*t0));
1075 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
1078 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1079 n_left_to_next, bi0, next0);
1082 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1084 return from_frame->n_vectors;
1088 sctp4_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1089 vlib_frame_t * from_frame)
1091 return sctp46_rcv_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1095 sctp6_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1096 vlib_frame_t * from_frame)
1098 return sctp46_rcv_phase_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1102 format_sctp_rx_trace_short (u8 * s, va_list * args)
1104 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1105 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1106 sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
1108 s = format (s, "%d -> %d (%U)",
1109 clib_net_to_host_u16 (t->sctp_header.src_port),
1110 clib_net_to_host_u16 (t->sctp_header.dst_port),
1111 format_sctp_state, t->sctp_connection.state);
1117 VLIB_REGISTER_NODE (sctp4_rcv_phase_node) =
1119 .function = sctp4_rcv_phase,
1120 .name = "sctp4-rcv",
1121 /* Takes a vector of packets. */
1122 .vector_size = sizeof (u32),
1123 .n_errors = SCTP_N_ERROR,
1124 .error_strings = sctp_error_strings,
1125 .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1128 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1129 foreach_sctp_state_next
1132 .format_trace = format_sctp_rx_trace_short,
1136 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_rcv_phase_node, sctp4_rcv_phase);
1139 VLIB_REGISTER_NODE (sctp6_init_phase_node) =
1141 .function = sctp6_rcv_phase,
1142 .name = "sctp6-rcv",
1143 /* Takes a vector of packets. */
1144 .vector_size = sizeof (u32),
1145 .n_errors = SCTP_N_ERROR,
1146 .error_strings = sctp_error_strings,
1147 .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1150 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1151 foreach_sctp_state_next
1154 .format_trace = format_sctp_rx_trace_short,
1158 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_init_phase_node, sctp6_rcv_phase);
1160 vlib_node_registration_t sctp4_shutdown_phase_node;
1161 vlib_node_registration_t sctp6_shutdown_phase_node;
1164 sctp_handle_shutdown (sctp_header_t * sctp_hdr,
1165 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1166 sctp_connection_t * sctp_conn, u8 idx,
1167 vlib_buffer_t * b0, u16 sctp_implied_length,
1170 sctp_shutdown_association_chunk_t *shutdown_chunk =
1171 (sctp_shutdown_association_chunk_t *) (sctp_hdr);
1173 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1174 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1176 return SCTP_ERROR_INVALID_TAG;
1180 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1182 if (sctp_is_bundling (sctp_implied_length, &shutdown_chunk->chunk_hdr))
1183 return SCTP_ERROR_BUNDLING_VIOLATION;
1185 switch (sctp_conn->state)
1187 case SCTP_STATE_ESTABLISHED:
1188 if (sctp_check_outstanding_data_chunks (sctp_conn) == 0)
1189 sctp_conn->state = SCTP_STATE_SHUTDOWN_RECEIVED;
1190 sctp_send_shutdown_ack (sctp_conn, idx, b0);
1193 case SCTP_STATE_SHUTDOWN_SENT:
1194 sctp_send_shutdown_ack (sctp_conn, idx, b0);
1198 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
1200 return SCTP_ERROR_NONE;
1204 sctp_handle_shutdown_ack (sctp_header_t * sctp_hdr,
1205 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1206 sctp_connection_t * sctp_conn, u8 idx,
1207 vlib_buffer_t * b0, u16 sctp_implied_length,
1210 sctp_shutdown_ack_chunk_t *shutdown_ack_chunk =
1211 (sctp_shutdown_ack_chunk_t *) (sctp_hdr);
1213 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1214 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1216 return SCTP_ERROR_INVALID_TAG;
1220 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1222 if (sctp_is_bundling (sctp_implied_length, &shutdown_ack_chunk->chunk_hdr))
1223 return SCTP_ERROR_BUNDLING_VIOLATION;
1225 /* Whether we are in SCTP_STATE_SHUTDOWN_SENT or SCTP_STATE_SHUTDOWN_ACK_SENT
1226 * the reception of a SHUTDOWN_ACK chunk leads to the same actions:
1227 * - STOP T2_SHUTDOWN timer
1228 * - SEND SHUTDOWN_COMPLETE chunk
1230 sctp_timer_reset (sctp_conn, SCTP_PRIMARY_PATH_IDX, SCTP_TIMER_T2_SHUTDOWN);
1232 sctp_send_shutdown_complete (sctp_conn, idx, b0);
1234 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
1236 return SCTP_ERROR_NONE;
1240 sctp_handle_shutdown_complete (sctp_header_t * sctp_hdr,
1241 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1242 sctp_connection_t * sctp_conn, u8 idx,
1243 vlib_buffer_t * b0, u16 sctp_implied_length,
1246 sctp_shutdown_complete_chunk_t *shutdown_complete =
1247 (sctp_shutdown_complete_chunk_t *) (sctp_hdr);
1249 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1250 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1252 return SCTP_ERROR_INVALID_TAG;
1256 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1258 if (sctp_is_bundling (sctp_implied_length, &shutdown_complete->chunk_hdr))
1259 return SCTP_ERROR_BUNDLING_VIOLATION;
1261 sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T2_SHUTDOWN);
1263 stream_session_disconnect_notify (&sctp_conn->sub_conn[idx].connection);
1265 sctp_conn->state = SCTP_STATE_CLOSED;
1267 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1269 return SCTP_ERROR_NONE;
1273 sctp46_shutdown_phase_inline (vlib_main_t * vm,
1274 vlib_node_runtime_t * node,
1275 vlib_frame_t * from_frame, int is_ip4)
1277 u32 n_left_from, next_index, *from, *to_next;
1278 u32 my_thread_index = vm->thread_index;
1280 from = vlib_frame_vector_args (from_frame);
1281 n_left_from = from_frame->n_vectors;
1283 next_index = node->cached_next_index;
1285 while (n_left_from > 0)
1289 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1291 while (n_left_from > 0 && n_left_to_next > 0)
1295 sctp_rx_trace_t *sctp_trace;
1296 sctp_header_t *sctp_hdr = 0;
1297 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1298 ip4_header_t *ip4_hdr = 0;
1299 ip6_header_t *ip6_hdr = 0;
1300 sctp_connection_t *sctp_conn;
1301 u16 sctp_implied_length = 0;
1302 u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_RCV_PHASE_N_NEXT;
1310 n_left_to_next -= 1;
1312 b0 = vlib_get_buffer (vm, bi0);
1314 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1317 if (PREDICT_FALSE (sctp_conn == 0))
1320 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1321 error0 = SCTP_ERROR_INVALID_CONNECTION;
1327 ip4_hdr = vlib_buffer_get_current (b0);
1328 sctp_hdr = ip4_next_header (ip4_hdr);
1329 idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
1333 ip6_hdr = vlib_buffer_get_current (b0);
1334 sctp_hdr = ip6_next_header (ip6_hdr);
1335 idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
1338 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1339 sctp_chunk_hdr = &full_hdr->common_hdr;
1341 sctp_implied_length =
1342 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1344 u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
1349 sctp_handle_shutdown (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1350 idx, b0, sctp_implied_length, &next0);
1355 sctp_handle_shutdown_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1356 idx, b0, sctp_implied_length,
1360 case SHUTDOWN_COMPLETE:
1362 sctp_handle_shutdown_complete (sctp_hdr, sctp_chunk_hdr,
1364 sctp_implied_length, &next0);
1366 sctp_connection_cleanup (sctp_conn);
1370 * DATA chunks can still be transmitted/received in the SHUTDOWN-PENDING
1371 * and SHUTDOWN-SENT states (as per RFC4960 Section 6)
1375 sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
1376 sctp_conn, idx, b0, &next0);
1379 case OPERATION_ERROR:
1381 sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0,
1385 case COOKIE_ECHO: /* Cookie Received While Shutting Down */
1386 sctp_prepare_operation_error (sctp_conn, idx, b0,
1387 COOKIE_RECEIVED_WHILE_SHUTTING_DOWN);
1388 error0 = SCTP_ERROR_NONE;
1389 next0 = sctp_next_output (is_ip4);
1391 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1392 * are handled by the input-dispatcher function using the table-lookup
1393 * hence we should never get to the "default" case below.
1396 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1397 next0 = sctp_next_drop (is_ip4);
1401 if (error0 != SCTP_ERROR_NONE)
1403 clib_warning ("error while parsing chunk");
1404 sctp_connection_cleanup (sctp_conn);
1405 next0 = sctp_next_drop (is_ip4);
1410 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1413 vlib_add_trace (vm, node, b0, sizeof (*sctp_trace));
1415 if (sctp_hdr != NULL)
1416 clib_memcpy (&sctp_trace->sctp_header, sctp_hdr,
1417 sizeof (sctp_trace->sctp_header));
1419 if (sctp_conn != NULL)
1420 clib_memcpy (&sctp_trace->sctp_connection, sctp_conn,
1421 sizeof (sctp_trace->sctp_connection));
1424 b0->error = node->errors[error0];
1426 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1427 n_left_to_next, bi0, next0);
1430 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1433 return from_frame->n_vectors;
1438 sctp4_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1439 vlib_frame_t * from_frame)
1441 return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1445 sctp6_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1446 vlib_frame_t * from_frame)
1448 return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1452 VLIB_REGISTER_NODE (sctp4_shutdown_phase_node) =
1454 .function = sctp4_shutdown_phase,
1455 .name = "sctp4-shutdown",
1456 /* Takes a vector of packets. */
1457 .vector_size = sizeof (u32),
1458 .n_errors = SCTP_N_ERROR,
1459 .error_strings = sctp_error_strings,
1460 .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1463 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1464 foreach_sctp_state_next
1467 .format_trace = format_sctp_rx_trace_short,
1471 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_shutdown_phase_node,
1472 sctp4_shutdown_phase);
1475 VLIB_REGISTER_NODE (sctp6_shutdown_phase_node) =
1477 .function = sctp6_shutdown_phase,
1478 .name = "sctp6-shutdown",
1479 /* Takes a vector of packets. */
1480 .vector_size = sizeof (u32),
1481 .n_errors = SCTP_N_ERROR,
1482 .error_strings = sctp_error_strings,
1483 .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1486 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1487 foreach_sctp_state_next
1490 .format_trace = format_sctp_rx_trace_short,
1494 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_shutdown_phase_node,
1495 sctp6_shutdown_phase);
1497 vlib_node_registration_t sctp4_listen_phase_node;
1498 vlib_node_registration_t sctp6_listen_phase_node;
1500 vlib_node_registration_t sctp4_established_phase_node;
1501 vlib_node_registration_t sctp6_established_phase_node;
1504 sctp_handle_sack (sctp_selective_ack_chunk_t * sack_chunk,
1505 sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b0,
1508 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1509 if (sctp_conn->local_tag != sack_chunk->sctp_hdr.verification_tag)
1511 return SCTP_ERROR_INVALID_TAG;
1514 sctp_conn->sub_conn[idx].last_seen = sctp_time_now ();
1516 /* Section 7.2.2; point (2) */
1517 if (sctp_conn->sub_conn[idx].cwnd > sctp_conn->sub_conn[idx].ssthresh)
1518 sctp_conn->sub_conn[idx].partially_acked_bytes =
1519 sctp_conn->next_tsn - sack_chunk->cumulative_tsn_ack;
1521 /* Section 7.2.2; point (5) */
1522 if (sctp_conn->next_tsn - sack_chunk->cumulative_tsn_ack == 0)
1523 sctp_conn->sub_conn[idx].partially_acked_bytes = 0;
1525 sctp_conn->last_unacked_tsn = sack_chunk->cumulative_tsn_ack;
1527 sctp_calculate_rto (sctp_conn, idx);
1529 sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T3_RXTX,
1530 sctp_conn->sub_conn[idx].RTO);
1532 sctp_conn->sub_conn[idx].RTO_pending = 0;
1534 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1536 return SCTP_ERROR_NONE;
1540 sctp_handle_heartbeat (sctp_hb_req_chunk_t * sctp_hb_chunk,
1541 sctp_connection_t * sctp_conn, u8 idx,
1542 vlib_buffer_t * b0, u16 * next0)
1544 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1545 if (sctp_conn->local_tag != sctp_hb_chunk->sctp_hdr.verification_tag)
1547 return SCTP_ERROR_INVALID_TAG;
1550 sctp_prepare_heartbeat_ack_chunk (sctp_conn, idx, b0);
1552 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].connection.is_ip4);
1554 return SCTP_ERROR_NONE;
1558 sctp_handle_heartbeat_ack (sctp_hb_ack_chunk_t * sctp_hb_ack_chunk,
1559 sctp_connection_t * sctp_conn, u8 idx,
1560 vlib_buffer_t * b0, u16 * next0)
1562 sctp_conn->sub_conn[idx].last_seen = sctp_time_now ();
1564 sctp_conn->sub_conn[idx].unacknowledged_hb -= 1;
1566 sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
1567 sctp_conn->sub_conn[idx].RTO);
1569 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1571 return SCTP_ERROR_NONE;
1575 sctp_node_inc_counter (vlib_main_t * vm, u32 sctp4_node, u32 sctp6_node,
1576 u8 is_ip4, u8 evt, u8 val)
1578 if (PREDICT_TRUE (!val))
1582 vlib_node_increment_counter (vm, sctp4_node, evt, val);
1584 vlib_node_increment_counter (vm, sctp6_node, evt, val);
1588 sctp46_listen_process_inline (vlib_main_t * vm,
1589 vlib_node_runtime_t * node,
1590 vlib_frame_t * from_frame, int is_ip4)
1592 u32 n_left_from, next_index, *from, *to_next;
1593 u32 my_thread_index = vm->thread_index;
1595 from = vlib_frame_vector_args (from_frame);
1596 n_left_from = from_frame->n_vectors;
1598 next_index = node->cached_next_index;
1600 while (n_left_from > 0)
1604 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1606 while (n_left_from > 0 && n_left_to_next > 0)
1610 sctp_header_t *sctp_hdr = 0;
1611 ip4_header_t *ip4_hdr;
1612 ip6_header_t *ip6_hdr;
1613 sctp_connection_t *child_conn;
1614 sctp_connection_t *sctp_listener;
1615 u16 next0 = sctp_next_drop (is_ip4), error0 = SCTP_ERROR_ENQUEUED;
1622 n_left_to_next -= 1;
1624 b0 = vlib_get_buffer (vm, bi0);
1626 sctp_listener_get (vnet_buffer (b0)->sctp.connection_index);
1630 ip4_hdr = vlib_buffer_get_current (b0);
1631 sctp_hdr = ip4_next_header (ip4_hdr);
1635 ip6_hdr = vlib_buffer_get_current (b0);
1636 sctp_hdr = ip6_next_header (ip6_hdr);
1640 sctp_lookup_connection (sctp_listener->sub_conn
1641 [SCTP_PRIMARY_PATH_IDX].c_fib_index, b0,
1642 my_thread_index, is_ip4);
1644 if (PREDICT_FALSE (child_conn->state != SCTP_STATE_CLOSED))
1647 ("conn_index = %u: child_conn->state != SCTP_STATE_CLOSED.... STATE=%s",
1648 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].
1650 sctp_state_to_string (child_conn->state));
1651 error0 = SCTP_ERROR_CREATE_EXISTS;
1655 /* Create child session and send SYN-ACK */
1656 child_conn = sctp_connection_new (my_thread_index);
1657 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].subconn_idx =
1658 SCTP_PRIMARY_PATH_IDX;
1659 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_lcl_port =
1661 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_rmt_port =
1663 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_is_ip4 = is_ip4;
1664 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.proto =
1665 sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.proto;
1666 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].PMTU =
1667 sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX].PMTU;
1668 child_conn->state = SCTP_STATE_CLOSED;
1672 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_lcl_ip4.as_u32 =
1673 ip4_hdr->dst_address.as_u32;
1674 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_rmt_ip4.as_u32 =
1675 ip4_hdr->src_address.as_u32;
1679 clib_memcpy (&child_conn->
1680 sub_conn[SCTP_PRIMARY_PATH_IDX].c_lcl_ip6,
1681 &ip6_hdr->dst_address, sizeof (ip6_address_t));
1682 clib_memcpy (&child_conn->
1683 sub_conn[SCTP_PRIMARY_PATH_IDX].c_rmt_ip6,
1684 &ip6_hdr->src_address, sizeof (ip6_address_t));
1687 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1688 sctp_chunks_common_hdr_t *sctp_chunk_hdr = &full_hdr->common_hdr;
1690 u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
1691 if (chunk_type != INIT)
1694 ("conn_index = %u: chunk_type != INIT... chunk_type=%s",
1695 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].
1696 connection.c_index, sctp_chunk_to_string (chunk_type));
1698 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1699 next0 = sctp_next_drop (is_ip4);
1703 u16 sctp_implied_length =
1704 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1709 sctp_connection_timers_init (child_conn);
1711 sctp_init_snd_vars (child_conn);
1714 sctp_handle_init (sctp_hdr, sctp_chunk_hdr, child_conn, b0,
1715 sctp_implied_length);
1717 sctp_init_cwnd (child_conn);
1719 if (error0 == SCTP_ERROR_NONE)
1721 if (stream_session_accept
1723 sub_conn[SCTP_PRIMARY_PATH_IDX].connection,
1725 sub_conn[SCTP_PRIMARY_PATH_IDX].c_s_index, 0))
1727 clib_warning ("session accept fail");
1728 sctp_connection_cleanup (child_conn);
1729 error0 = SCTP_ERROR_CREATE_SESSION_FAIL;
1732 next0 = sctp_next_output (is_ip4);
1736 /* Reception of a DATA chunk whilst in the CLOSED state is called
1737 * "Out of the Blue" packet and handling of the chunk needs special treatment
1738 * as per RFC4960 section 8.4
1743 case OPERATION_ERROR:
1745 sctp_handle_operation_err (sctp_hdr, child_conn,
1746 SCTP_PRIMARY_PATH_IDX, b0, &next0);
1751 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1753 sctp_rx_trace_t *t0 =
1754 vlib_add_trace (vm, node, b0, sizeof (*t0));
1755 clib_memcpy (&t0->sctp_header, sctp_hdr,
1756 sizeof (t0->sctp_header));
1757 clib_memcpy (&t0->sctp_connection, sctp_listener,
1758 sizeof (t0->sctp_connection));
1761 b0->error = node->errors[error0];
1763 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1764 n_left_to_next, bi0, next0);
1766 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1769 return from_frame->n_vectors;
1773 sctp4_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1774 vlib_frame_t * from_frame)
1776 return sctp46_listen_process_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1780 sctp6_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1781 vlib_frame_t * from_frame)
1783 return sctp46_listen_process_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1787 sctp46_established_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1788 vlib_frame_t * from_frame, int is_ip4)
1790 u32 n_left_from, next_index, *from, *to_next;
1791 u32 my_thread_index = vm->thread_index, errors = 0;
1793 from = vlib_frame_vector_args (from_frame);
1794 n_left_from = from_frame->n_vectors;
1796 next_index = node->cached_next_index;
1798 while (n_left_from > 0)
1802 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1804 while (n_left_from > 0 && n_left_to_next > 0)
1808 sctp_header_t *sctp_hdr = 0;
1809 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1810 ip4_header_t *ip4_hdr = 0;
1811 ip6_header_t *ip6_hdr = 0;
1812 sctp_connection_t *sctp_conn;
1813 u16 error0 = SCTP_ERROR_ENQUEUED, next0 =
1814 SCTP_ESTABLISHED_PHASE_N_NEXT;
1822 n_left_to_next -= 1;
1824 b0 = vlib_get_buffer (vm, bi0);
1826 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1829 if (PREDICT_FALSE (sctp_conn == 0))
1832 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1833 error0 = SCTP_ERROR_INVALID_CONNECTION;
1838 ip4_hdr = vlib_buffer_get_current (b0);
1839 sctp_hdr = ip4_next_header (ip4_hdr);
1840 idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
1844 ip6_hdr = vlib_buffer_get_current (b0);
1845 sctp_hdr = ip6_next_header (ip6_hdr);
1846 idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
1849 sctp_conn->sub_conn[idx].subconn_idx = idx;
1851 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1853 (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
1855 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
1861 sctp_handle_cookie_echo (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1867 sctp_handle_cookie_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1873 sctp_handle_sack ((sctp_selective_ack_chunk_t *) sctp_hdr,
1874 sctp_conn, idx, b0, &next0);
1879 sctp_handle_heartbeat ((sctp_hb_req_chunk_t *) sctp_hdr,
1880 sctp_conn, idx, b0, &next0);
1885 sctp_handle_heartbeat_ack ((sctp_hb_ack_chunk_t *) sctp_hdr,
1886 sctp_conn, idx, b0, &next0);
1891 sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
1892 sctp_conn, idx, b0, &next0);
1895 case OPERATION_ERROR:
1897 sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0,
1901 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1902 * are handled by the input-dispatcher function using the table-lookup
1903 * hence we should never get to the "default" case below.
1906 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1907 next0 = sctp_next_drop (is_ip4);
1912 b0->error = node->errors[error0];
1913 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1915 sctp_rx_trace_t *t0 =
1916 vlib_add_trace (vm, node, b0, sizeof (*t0));
1917 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
1920 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1921 n_left_to_next, bi0, next0);
1924 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1927 errors = session_manager_flush_enqueue_events (TRANSPORT_PROTO_SCTP,
1930 sctp_node_inc_counter (vm, is_ip4, sctp4_established_phase_node.index,
1931 sctp6_established_phase_node.index,
1932 SCTP_ERROR_EVENT_FIFO_FULL, errors);
1933 sctp_flush_frame_to_output (vm, my_thread_index, is_ip4);
1935 return from_frame->n_vectors;
1939 sctp4_established_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1940 vlib_frame_t * from_frame)
1942 return sctp46_established_phase_inline (vm, node, from_frame,
1947 sctp6_established_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1948 vlib_frame_t * from_frame)
1950 return sctp46_established_phase_inline (vm, node, from_frame,
1955 format_sctp_rx_trace (u8 * s, va_list * args)
1957 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1958 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1959 sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
1960 u32 indent = format_get_indent (s);
1962 s = format (s, "%U\n%U%U",
1963 format_sctp_header, &t->sctp_header, 128,
1964 format_white_space, indent,
1965 format_sctp_connection, &t->sctp_connection, 1);
1971 VLIB_REGISTER_NODE (sctp4_listen_phase_node) =
1973 .function = sctp4_listen_phase,
1974 .name = "sctp4-listen",
1975 /* Takes a vector of packets. */
1976 .vector_size = sizeof (u32),
1977 .n_errors = SCTP_N_ERROR,
1978 .error_strings = sctp_error_strings,
1979 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
1982 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
1983 foreach_sctp_state_next
1986 .format_trace = format_sctp_rx_trace_short,
1990 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_listen_phase_node, sctp4_listen_phase);
1993 VLIB_REGISTER_NODE (sctp6_listen_phase_node) =
1995 .function = sctp6_listen_phase,
1996 .name = "sctp6-listen",
1997 /* Takes a vector of packets. */
1998 .vector_size = sizeof (u32),
1999 .n_errors = SCTP_N_ERROR,
2000 .error_strings = sctp_error_strings,
2001 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
2004 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
2005 foreach_sctp_state_next
2008 .format_trace = format_sctp_rx_trace_short,
2012 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_listen_phase_node, sctp6_listen_phase);
2015 VLIB_REGISTER_NODE (sctp4_established_phase_node) =
2017 .function = sctp4_established_phase,
2018 .name = "sctp4-established",
2019 /* Takes a vector of packets. */
2020 .vector_size = sizeof (u32),
2021 .n_errors = SCTP_N_ERROR,
2022 .error_strings = sctp_error_strings,
2023 .n_next_nodes = SCTP_ESTABLISHED_PHASE_N_NEXT,
2026 #define _(s,n) [SCTP_ESTABLISHED_PHASE_NEXT_##s] = n,
2027 foreach_sctp_state_next
2030 .format_trace = format_sctp_rx_trace_short,
2034 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_established_phase_node,
2035 sctp4_established_phase);
2038 VLIB_REGISTER_NODE (sctp6_established_phase_node) =
2040 .function = sctp6_established_phase,
2041 .name = "sctp6-established",
2042 /* Takes a vector of packets. */
2043 .vector_size = sizeof (u32),
2044 .n_errors = SCTP_N_ERROR,
2045 .error_strings = sctp_error_strings,
2046 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
2049 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
2050 foreach_sctp_state_next
2053 .format_trace = format_sctp_rx_trace_short,
2057 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_established_phase_node,
2058 sctp6_established_phase);
2061 * This is the function executed first for the SCTP graph.
2062 * It takes care of doing the initial message parsing and
2063 * dispatch to the specialized function.
2066 sctp46_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2067 vlib_frame_t * from_frame, int is_ip4)
2069 u32 n_left_from, next_index, *from, *to_next;
2070 u32 my_thread_index = vm->thread_index;
2072 sctp_main_t *tm = vnet_get_sctp_main ();
2074 from = vlib_frame_vector_args (from_frame);
2075 n_left_from = from_frame->n_vectors;
2076 next_index = node->cached_next_index;
2077 sctp_set_time_now (my_thread_index);
2079 while (n_left_from > 0)
2083 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2085 while (n_left_from > 0 && n_left_to_next > 0)
2087 int n_advance_bytes0, n_data_bytes0;
2088 u32 bi0, fib_index0;
2090 sctp_header_t *sctp_hdr = 0;
2091 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
2092 sctp_connection_t *sctp_conn;
2093 transport_connection_t *trans_conn;
2094 ip4_header_t *ip4_hdr;
2095 ip6_header_t *ip6_hdr;
2096 u32 error0 = SCTP_ERROR_NO_LISTENER, next0 = SCTP_INPUT_NEXT_DROP;
2103 n_left_to_next -= 1;
2105 b0 = vlib_get_buffer (vm, bi0);
2106 vnet_buffer (b0)->sctp.flags = 0;
2107 fib_index0 = vnet_buffer (b0)->ip.fib_index;
2109 /* Checksum computed by ipx_local no need to compute again */
2113 ip4_hdr = vlib_buffer_get_current (b0);
2114 sctp_hdr = ip4_next_header (ip4_hdr);
2116 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
2117 sctp_chunk_hdr = &full_hdr->common_hdr;
2120 (ip4_header_bytes (ip4_hdr) +
2121 sizeof (sctp_payload_data_chunk_t));
2123 clib_net_to_host_u16 (ip4_hdr->length) - n_advance_bytes0;
2125 trans_conn = session_lookup_connection_wt4 (fib_index0,
2126 &ip4_hdr->dst_address,
2127 &ip4_hdr->src_address,
2130 TRANSPORT_PROTO_SCTP,
2136 ip6_hdr = vlib_buffer_get_current (b0);
2137 sctp_hdr = ip6_next_header (ip6_hdr);
2139 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
2140 sctp_chunk_hdr = &full_hdr->common_hdr;
2142 n_advance_bytes0 = sctp_header_bytes ();
2144 clib_net_to_host_u16 (ip6_hdr->payload_length) -
2146 n_advance_bytes0 += sizeof (ip6_hdr[0]);
2148 trans_conn = session_lookup_connection_wt6 (fib_index0,
2149 &ip6_hdr->dst_address,
2150 &ip6_hdr->src_address,
2153 TRANSPORT_PROTO_SCTP,
2159 if (PREDICT_FALSE (n_advance_bytes0 < 0))
2161 error0 = SCTP_ERROR_LENGTH;
2165 sctp_conn = sctp_get_connection_from_transport (trans_conn);
2166 vnet_sctp_common_hdr_params_net_to_host (sctp_chunk_hdr);
2168 u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
2169 if (chunk_type >= UNKNOWN)
2172 ("Received an unrecognized chunk; sending back OPERATION_ERROR chunk");
2174 sctp_prepare_operation_error (sctp_conn, SCTP_PRIMARY_PATH_IDX,
2175 b0, UNRECOGNIZED_CHUNK_TYPE);
2177 error0 = SCTP_ERROR_UNKOWN_CHUNK;
2178 next0 = sctp_next_output (is_ip4);
2182 vnet_buffer (b0)->sctp.hdr_offset =
2183 (u8 *) sctp_hdr - (u8 *) vlib_buffer_get_current (b0);
2185 /* Session exists */
2186 if (PREDICT_TRUE (0 != sctp_conn))
2188 /* Save connection index */
2189 vnet_buffer (b0)->sctp.connection_index = trans_conn->c_index;
2190 vnet_buffer (b0)->sctp.data_offset = n_advance_bytes0;
2191 vnet_buffer (b0)->sctp.data_len = n_data_bytes0;
2193 next0 = tm->dispatch_table[sctp_conn->state][chunk_type].next;
2194 error0 = tm->dispatch_table[sctp_conn->state][chunk_type].error;
2196 SCTP_DBG_STATE_MACHINE
2197 ("S_INDEX = %u, C_INDEX = %u, TRANS_CONN = %p, SCTP_CONN = %p, CURRENT_CONNECTION_STATE = %s,"
2198 "CHUNK_TYPE_RECEIVED = %s " "NEXT_PHASE = %s",
2199 sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].
2201 sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].
2202 connection.c_index, trans_conn, sctp_conn,
2203 sctp_state_to_string (sctp_conn->state),
2204 sctp_chunk_to_string (chunk_type), phase_to_string (next0));
2206 if (chunk_type == DATA)
2207 SCTP_ADV_DBG ("n_advance_bytes0 = %u, n_data_bytes0 = %u",
2208 n_advance_bytes0, n_data_bytes0);
2215 next0 = SCTP_INPUT_NEXT_DROP;
2216 error0 = SCTP_ERROR_FILTERED;
2218 else if ((is_ip4 && tm->punt_unknown4) ||
2219 (!is_ip4 && tm->punt_unknown6))
2221 next0 = SCTP_INPUT_NEXT_PUNT_PHASE;
2222 error0 = SCTP_ERROR_PUNT;
2226 next0 = SCTP_INPUT_NEXT_DROP;
2227 error0 = SCTP_ERROR_NO_LISTENER;
2229 SCTP_DBG_STATE_MACHINE ("sctp_conn == NULL, NEXT_PHASE = %s",
2230 phase_to_string (next0));
2235 b0->error = error0 ? node->errors[error0] : 0;
2237 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2239 sctp_rx_trace_t *t0 =
2240 vlib_add_trace (vm, node, b0, sizeof (*t0));
2241 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
2243 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2244 n_left_to_next, bi0, next0);
2247 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2249 return from_frame->n_vectors;
2253 sctp4_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2254 vlib_frame_t * from_frame)
2256 return sctp46_input_dispatcher (vm, node, from_frame, 1 /* is_ip4 */ );
2260 sctp6_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2261 vlib_frame_t * from_frame)
2263 return sctp46_input_dispatcher (vm, node, from_frame, 0 /* is_ip4 */ );
2267 VLIB_REGISTER_NODE (sctp4_input_node) =
2269 .function = sctp4_input_dispatcher,
2270 .name = "sctp4-input",
2271 /* Takes a vector of packets. */
2272 .vector_size = sizeof (u32),
2273 .n_errors = SCTP_N_ERROR,
2274 .error_strings = sctp_error_strings,
2275 .n_next_nodes = SCTP_INPUT_N_NEXT,
2278 #define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
2279 foreach_sctp4_input_next
2282 .format_buffer = format_sctp_header,
2283 .format_trace = format_sctp_rx_trace,
2287 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_input_node, sctp4_input_dispatcher);
2290 VLIB_REGISTER_NODE (sctp6_input_node) =
2292 .function = sctp6_input_dispatcher,
2293 .name = "sctp6-input",
2294 /* Takes a vector of packets. */
2295 .vector_size = sizeof (u32),
2296 .n_errors = SCTP_N_ERROR,
2297 .error_strings = sctp_error_strings,
2298 .n_next_nodes = SCTP_INPUT_N_NEXT,
2301 #define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
2302 foreach_sctp6_input_next
2305 .format_buffer = format_sctp_header,
2306 .format_trace = format_sctp_rx_trace,
2310 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_input_node, sctp6_input_dispatcher);
2312 vlib_node_registration_t sctp4_input_node;
2313 vlib_node_registration_t sctp6_input_node;
2316 sctp_dispatch_table_init (sctp_main_t * tm)
2319 for (i = 0; i < ARRAY_LEN (tm->dispatch_table); i++)
2320 for (j = 0; j < ARRAY_LEN (tm->dispatch_table[i]); j++)
2322 tm->dispatch_table[i][j].next = SCTP_INPUT_NEXT_DROP;
2323 tm->dispatch_table[i][j].error = SCTP_ERROR_DISPATCH;
2326 #define _(t,f,n,e) \
2328 tm->dispatch_table[SCTP_STATE_##t][f].next = (n); \
2329 tm->dispatch_table[SCTP_STATE_##t][f].error = (e); \
2333 * SCTP STATE-MACHINE states:
2335 * _(CLOSED, "CLOSED") \
2336 * _(COOKIE_WAIT, "COOKIE_WAIT") \
2337 * _(COOKIE_ECHOED, "COOKIE_ECHOED") \
2338 * _(ESTABLISHED, "ESTABLISHED") \
2339 * _(SHUTDOWN_PENDING, "SHUTDOWN_PENDING") \
2340 * _(SHUTDOWN_SENT, "SHUTDOWN_SENT") \
2341 * _(SHUTDOWN_RECEIVED, "SHUTDOWN_RECEIVED") \
2342 * _(SHUTDOWN_ACK_SENT, "SHUTDOWN_ACK_SENT")
2344 //_(CLOSED, DATA, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */
2345 _(CLOSED, INIT, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2346 _(CLOSED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2347 _(CLOSED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2348 _(CLOSED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2349 _(CLOSED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2350 _(CLOSED, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2351 _(CLOSED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2352 _(CLOSED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2353 _(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2354 _(CLOSED, COOKIE_ECHO, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2355 _(CLOSED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2356 _(CLOSED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2357 _(CLOSED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2358 _(CLOSED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2359 _(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2361 _(COOKIE_WAIT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */
2362 _(COOKIE_WAIT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2363 _(COOKIE_WAIT, INIT_ACK, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2364 _(COOKIE_WAIT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2365 _(COOKIE_WAIT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2366 _(COOKIE_WAIT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2367 _(COOKIE_WAIT, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2368 _(COOKIE_WAIT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2369 _(COOKIE_WAIT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2370 _(COOKIE_WAIT, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2371 _(COOKIE_WAIT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2372 _(COOKIE_WAIT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2373 _(COOKIE_WAIT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2374 _(COOKIE_WAIT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2375 _(COOKIE_WAIT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2376 _(COOKIE_WAIT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2379 _(COOKIE_ECHOED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE);
2380 _(COOKIE_ECHOED, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2381 _(COOKIE_ECHOED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2382 _(COOKIE_ECHOED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2383 _(COOKIE_ECHOED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2384 _(COOKIE_ECHOED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2385 _(COOKIE_ECHOED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2386 _(COOKIE_ECHOED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2387 _(COOKIE_ECHOED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2388 _(COOKIE_ECHOED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2389 _(COOKIE_ECHOED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2390 _(COOKIE_ECHOED, COOKIE_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2392 _(COOKIE_ECHOED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2393 _(COOKIE_ECHOED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2394 _(COOKIE_ECHOED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2395 _(COOKIE_ECHOED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2398 _(ESTABLISHED, DATA, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2399 _(ESTABLISHED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2400 _(ESTABLISHED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2401 _(ESTABLISHED, SACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2402 _(ESTABLISHED, HEARTBEAT, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2404 _(ESTABLISHED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2406 _(ESTABLISHED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2407 _(ESTABLISHED, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2408 _(ESTABLISHED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2409 _(ESTABLISHED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2410 _(ESTABLISHED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2411 _(ESTABLISHED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2412 _(ESTABLISHED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2413 _(ESTABLISHED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2414 _(ESTABLISHED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2415 _(ESTABLISHED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2418 _(SHUTDOWN_PENDING, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2419 _(SHUTDOWN_PENDING, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2420 _(SHUTDOWN_PENDING, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2421 _(SHUTDOWN_PENDING, SACK, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2422 _(SHUTDOWN_PENDING, HEARTBEAT, SCTP_INPUT_NEXT_LISTEN_PHASE,
2424 _(SHUTDOWN_PENDING, HEARTBEAT_ACK, SCTP_INPUT_NEXT_LISTEN_PHASE,
2426 _(SHUTDOWN_PENDING, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2427 _(SHUTDOWN_PENDING, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2429 _(SHUTDOWN_PENDING, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2430 _(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2431 _(SHUTDOWN_PENDING, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2433 _(SHUTDOWN_PENDING, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2434 _(SHUTDOWN_PENDING, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2435 _(SHUTDOWN_PENDING, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2436 _(SHUTDOWN_PENDING, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2437 _(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2440 _(SHUTDOWN_SENT, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2441 _(SHUTDOWN_SENT, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2442 _(SHUTDOWN_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2443 _(SHUTDOWN_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2444 _(SHUTDOWN_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2445 _(SHUTDOWN_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2446 _(SHUTDOWN_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2447 _(SHUTDOWN_SENT, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2448 _(SHUTDOWN_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2450 _(SHUTDOWN_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2452 _(SHUTDOWN_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2453 _(SHUTDOWN_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2454 _(SHUTDOWN_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2455 _(SHUTDOWN_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2456 _(SHUTDOWN_SENT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2459 _(SHUTDOWN_RECEIVED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2460 _(SHUTDOWN_RECEIVED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2461 _(SHUTDOWN_RECEIVED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2462 _(SHUTDOWN_RECEIVED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2463 _(SHUTDOWN_RECEIVED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2464 _(SHUTDOWN_RECEIVED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2465 _(SHUTDOWN_RECEIVED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2466 _(SHUTDOWN_RECEIVED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2467 _(SHUTDOWN_RECEIVED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2469 _(SHUTDOWN_RECEIVED, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2471 _(SHUTDOWN_RECEIVED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2472 _(SHUTDOWN_RECEIVED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2473 _(SHUTDOWN_RECEIVED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2474 _(SHUTDOWN_RECEIVED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2475 _(SHUTDOWN_RECEIVED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2478 _(SHUTDOWN_ACK_SENT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2479 _(SHUTDOWN_ACK_SENT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk */
2480 _(SHUTDOWN_ACK_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2481 _(SHUTDOWN_ACK_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2482 _(SHUTDOWN_ACK_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2483 _(SHUTDOWN_ACK_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2484 _(SHUTDOWN_ACK_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2485 _(SHUTDOWN_ACK_SENT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2486 _(SHUTDOWN_ACK_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2487 _(SHUTDOWN_ACK_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2489 _(SHUTDOWN_ACK_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2490 _(SHUTDOWN_ACK_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2491 _(SHUTDOWN_ACK_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2492 _(SHUTDOWN_ACK_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2494 _(SHUTDOWN_ACK_SENT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2497 /* TODO: Handle COOKIE ECHO when a TCB Exists */
2503 sctp_input_init (vlib_main_t * vm)
2505 clib_error_t *error = 0;
2506 sctp_main_t *tm = vnet_get_sctp_main ();
2508 if ((error = vlib_call_init_function (vm, sctp_init)))
2511 /* Initialize dispatch table. */
2512 sctp_dispatch_table_init (tm);
2517 VLIB_INIT_FUNCTION (sctp_input_init);
2520 * fd.io coding-style-patch-verification: ON
2523 * eval: (c-set-style "gnu")