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 MAIN_SCTP_SUB_CONN_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 MAIN_SCTP_SUB_CONN_IDX,
349 b0, ip4_addr, ip6_addr);
351 sctp_prepare_abort_for_collision (sctp_conn,
352 MAIN_SCTP_SUB_CONN_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->snd_opts.a_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 [MAIN_SCTP_SUB_CONN_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 [MAIN_SCTP_SUB_CONN_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, MAIN_SCTP_SUB_CONN_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 sctp_calculate_rto (sctp_conn, idx);
505 /* remote_tag to be placed in the VERIFICATION_TAG field of the COOKIE_ECHO chunk */
506 sctp_conn->remote_tag = init_ack_chunk->initiate_tag;
507 sctp_conn->remote_initial_tsn =
508 clib_net_to_host_u32 (init_ack_chunk->initial_tsn);
509 sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn;
510 sctp_conn->next_tsn_expected = sctp_conn->remote_initial_tsn + 1;
511 SCTP_CONN_TRACKING_DBG ("sctp_conn->remote_initial_tsn = %u",
512 sctp_conn->remote_initial_tsn);
513 sctp_conn->snd_opts.a_rwnd = clib_net_to_host_u32 (init_ack_chunk->a_rwnd);
515 u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr);
517 if (length > sizeof (sctp_init_ack_chunk_t))
519 * There are optional parameters in the INIT ACK chunk
522 u16 pointer_offset = sizeof (sctp_init_ack_chunk_t);
524 while (pointer_offset < length)
526 sctp_opt_params_hdr_t *opt_params_hdr =
527 (sctp_opt_params_hdr_t *) ((char *) init_ack_chunk +
530 switch (clib_net_to_host_u16 (opt_params_hdr->type))
532 case SCTP_IPV4_ADDRESS_TYPE:
534 sctp_ipv4_addr_param_t *ipv4 =
535 (sctp_ipv4_addr_param_t *) opt_params_hdr;
537 sctp_sub_connection_add_ip4 (vlib_get_main (),
539 [MAIN_SCTP_SUB_CONN_IDX].connection.
540 lcl_ip.ip4, &ipv4->address);
544 case SCTP_IPV6_ADDRESS_TYPE:
546 sctp_ipv6_addr_param_t *ipv6 =
547 (sctp_ipv6_addr_param_t *) opt_params_hdr;
549 sctp_sub_connection_add_ip6 (vlib_get_main (),
551 [MAIN_SCTP_SUB_CONN_IDX].connection.
552 lcl_ip.ip6, &ipv6->address);
556 case SCTP_STATE_COOKIE_TYPE:
558 sctp_state_cookie_param_t *state_cookie_param =
559 (sctp_state_cookie_param_t *) opt_params_hdr;
561 clib_memcpy (&state_cookie, state_cookie_param,
562 sizeof (sctp_state_cookie_param_t));
565 case SCTP_HOSTNAME_ADDRESS_TYPE:
567 sctp_hostname_param_t *hostname_addr =
568 (sctp_hostname_param_t *) opt_params_hdr;
569 clib_memcpy (hostname, hostname_addr->hostname,
573 case SCTP_UNRECOGNIZED_TYPE:
578 u16 increment = clib_net_to_host_u16 (opt_params_hdr->length);
579 /* This indicates something really bad happened */
582 return SCTP_ERROR_INVALID_TAG;
584 pointer_offset += increment;
588 sctp_prepare_cookie_echo_chunk (sctp_conn, idx, b0, &state_cookie);
590 /* Start the T1_COOKIE timer */
591 sctp_timer_set (sctp_conn, idx,
592 SCTP_TIMER_T1_COOKIE, sctp_conn->sub_conn[idx].RTO);
594 return SCTP_ERROR_NONE;
597 /** Enqueue data out-of-order for delivery to application */
599 sctp_session_enqueue_data_ooo (sctp_connection_t * sctp_conn,
600 vlib_buffer_t * b, u16 data_len, u8 conn_idx)
602 int written, error = SCTP_ERROR_ENQUEUED;
605 session_enqueue_stream_connection (&sctp_conn->
606 sub_conn[conn_idx].connection, b, 0,
607 1 /* queue event */ ,
610 /* Update next_tsn_expected */
611 if (PREDICT_TRUE (written == data_len))
613 sctp_conn->next_tsn_expected += written;
615 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
616 sctp_conn->sub_conn[conn_idx].connection.c_index,
619 /* If more data written than expected, account for out-of-order bytes. */
620 else if (written > data_len)
622 sctp_conn->next_tsn_expected += written;
624 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
625 sctp_conn->sub_conn[conn_idx].connection.c_index,
628 else if (written > 0)
630 /* We've written something but FIFO is probably full now */
631 sctp_conn->next_tsn_expected += written;
633 error = SCTP_ERROR_PARTIALLY_ENQUEUED;
636 ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
637 sctp_conn->sub_conn[conn_idx].connection.c_index, written);
641 SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
642 sctp_conn->sub_conn[conn_idx].connection.c_index);
644 return SCTP_ERROR_FIFO_FULL;
647 /* TODO: Update out_of_order_map & SACK list */
652 /** Enqueue data for delivery to application */
654 sctp_session_enqueue_data (sctp_connection_t * sctp_conn, vlib_buffer_t * b,
655 u16 data_len, u8 conn_idx)
657 int written, error = SCTP_ERROR_ENQUEUED;
660 session_enqueue_stream_connection (&sctp_conn->
661 sub_conn[conn_idx].connection, b, 0,
662 1 /* queue event */ ,
665 /* Update next_tsn_expected */
666 if (PREDICT_TRUE (written == data_len))
668 sctp_conn->next_tsn_expected += written;
670 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
671 sctp_conn->sub_conn[conn_idx].connection.c_index,
674 /* If more data written than expected, account for out-of-order bytes. */
675 else if (written > data_len)
677 sctp_conn->next_tsn_expected += written;
679 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
680 sctp_conn->sub_conn[conn_idx].connection.c_index,
683 else if (written > 0)
685 /* We've written something but FIFO is probably full now */
686 sctp_conn->next_tsn_expected += written;
688 error = SCTP_ERROR_PARTIALLY_ENQUEUED;
691 ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
692 sctp_conn->sub_conn[conn_idx].connection.c_index, written);
696 SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
697 sctp_conn->sub_conn[conn_idx].connection.c_index);
699 return SCTP_ERROR_FIFO_FULL;
706 sctp_is_sack_delayable (sctp_connection_t * sctp_conn, u8 idx, u8 is_gapping)
710 SCTP_CONN_TRACKING_DBG
711 ("gapping != 0: CONN_INDEX = %u, sctp_conn->ack_state = %u",
712 sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
716 if (sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS)
718 SCTP_CONN_TRACKING_DBG
719 ("sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS: CONN_INDEX = %u, sctp_conn->ack_state = %u",
720 sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
724 sctp_conn->ack_state += 1;
730 sctp_is_connection_gapping (sctp_connection_t * sctp_conn, u32 tsn,
733 if (sctp_conn->next_tsn_expected != tsn) // It means data transmission is GAPPING
735 SCTP_CONN_TRACKING_DBG
736 ("GAPPING: CONN_INDEX = %u, sctp_conn->next_tsn_expected = %u, tsn = %u, diff = %u",
737 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.c_index,
738 sctp_conn->next_tsn_expected, tsn,
739 sctp_conn->next_tsn_expected - tsn);
746 sctp_handle_data (sctp_payload_data_chunk_t * sctp_data_chunk,
747 sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b,
750 u32 error = 0, n_data_bytes;
753 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
754 if (sctp_conn->local_tag != sctp_data_chunk->sctp_hdr.verification_tag)
756 return SCTP_ERROR_INVALID_TAG;
759 vnet_buffer (b)->sctp.sid = sctp_data_chunk->stream_id;
760 vnet_buffer (b)->sctp.ssn = sctp_data_chunk->stream_seq;
762 u32 tsn = clib_net_to_host_u32 (sctp_data_chunk->tsn);
764 vlib_buffer_advance (b, vnet_buffer (b)->sctp.data_offset);
765 n_data_bytes = vnet_buffer (b)->sctp.data_len;
766 ASSERT (n_data_bytes);
768 sctp_is_connection_gapping (sctp_conn, tsn, &is_gapping);
770 sctp_conn->last_rcvd_tsn = tsn;
772 SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
774 u8 bbit = vnet_sctp_get_bbit (&sctp_data_chunk->chunk_hdr);
775 u8 ebit = vnet_sctp_get_ebit (&sctp_data_chunk->chunk_hdr);
777 if (bbit == 1 && ebit == 1) /* Unfragmented message */
779 /* In order data, enqueue. Fifo figures out by itself if any out-of-order
780 * segments can be enqueued after fifo tail offset changes. */
781 if (PREDICT_FALSE (is_gapping == 1))
783 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
785 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
787 else if (bbit == 1 && ebit == 0) /* First piece of a fragmented user message */
789 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
791 else if (bbit == 0 && ebit == 1) /* Last piece of a fragmented user message */
793 if (PREDICT_FALSE (is_gapping == 1))
795 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
797 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
799 else /* Middle piece of a fragmented user message */
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 sctp_conn->last_rcvd_tsn = tsn;
809 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
811 SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
813 if (!sctp_is_sack_delayable (sctp_conn, idx, is_gapping))
814 sctp_prepare_sack_chunk (sctp_conn, idx, b);
816 sctp_conn->sub_conn[idx].enqueue_state = error;
822 sctp_handle_cookie_echo (sctp_header_t * sctp_hdr,
823 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
824 sctp_connection_t * sctp_conn, u8 idx,
825 vlib_buffer_t * b0, u16 * next0)
827 u32 now = sctp_time_now ();
829 sctp_cookie_echo_chunk_t *cookie_echo =
830 (sctp_cookie_echo_chunk_t *) sctp_hdr;
832 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
833 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
835 return SCTP_ERROR_INVALID_TAG;
838 sctp_calculate_rto (sctp_conn, idx);
841 clib_net_to_host_u32 (cookie_echo->cookie.creation_time);
842 u32 cookie_lifespan =
843 clib_net_to_host_u32 (cookie_echo->cookie.cookie_lifespan);
844 if (now > creation_time + cookie_lifespan)
846 SCTP_DBG ("now (%u) > creation_time (%u) + cookie_lifespan (%u)",
847 now, creation_time, cookie_lifespan);
848 return SCTP_ERROR_COOKIE_ECHO_VIOLATION;
851 sctp_prepare_cookie_ack_chunk (sctp_conn, idx, b0);
854 sctp_conn->state = SCTP_STATE_ESTABLISHED;
855 sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_STATE_UP;
856 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
858 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
859 sctp_conn->sub_conn[idx].RTO);
861 stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
863 return SCTP_ERROR_NONE;
868 sctp_handle_cookie_ack (sctp_header_t * sctp_hdr,
869 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
870 sctp_connection_t * sctp_conn, u8 idx,
871 vlib_buffer_t * b0, u16 * next0)
873 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
874 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
876 return SCTP_ERROR_INVALID_TAG;
879 sctp_calculate_rto (sctp_conn, idx);
881 sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T1_COOKIE);
883 sctp_conn->state = SCTP_STATE_ESTABLISHED;
884 sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_STATE_UP;
886 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
888 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
889 sctp_conn->sub_conn[idx].RTO);
891 stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
893 return SCTP_ERROR_NONE;
898 sctp46_rcv_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
899 vlib_frame_t * from_frame, int is_ip4)
901 sctp_main_t *tm = vnet_get_sctp_main ();
903 u32 n_left_from, next_index, *from, *to_next;
904 u32 my_thread_index = vm->thread_index;
906 from = vlib_frame_vector_args (from_frame);
907 n_left_from = from_frame->n_vectors;
909 next_index = node->cached_next_index;
911 while (n_left_from > 0)
915 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
917 while (n_left_from > 0 && n_left_to_next > 0)
921 sctp_header_t *sctp_hdr = 0;
922 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
923 ip4_header_t *ip4_hdr = 0;
924 ip6_header_t *ip6_hdr = 0;
925 sctp_connection_t *sctp_conn, *new_sctp_conn;
926 u16 sctp_implied_length = 0;
927 u16 error0 = SCTP_ERROR_NONE, next0 = sctp_next_drop (is_ip4);
937 b0 = vlib_get_buffer (vm, bi0);
939 /* If we are in SCTP_COOKIE_WAIT_STATE then the connection
940 * will come from the half-open connections pool.
943 sctp_half_open_connection_get (vnet_buffer (b0)->
944 sctp.connection_index);
946 if (PREDICT_FALSE (sctp_conn == 0))
949 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
950 error0 = SCTP_ERROR_INVALID_CONNECTION;
955 ip4_hdr = vlib_buffer_get_current (b0);
956 sctp_hdr = ip4_next_header (ip4_hdr);
957 idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
961 ip6_hdr = vlib_buffer_get_current (b0);
962 sctp_hdr = ip6_next_header (ip6_hdr);
963 idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
966 sctp_conn->sub_conn[idx].subconn_idx = idx;
967 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
970 (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
972 sctp_implied_length =
973 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
975 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
981 sctp_is_valid_init_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
982 b0, sctp_implied_length);
984 if (error0 == SCTP_ERROR_NONE)
986 pool_get (tm->connections[my_thread_index], new_sctp_conn);
987 clib_memcpy (new_sctp_conn, sctp_conn,
988 sizeof (*new_sctp_conn));
989 new_sctp_conn->sub_conn[idx].c_c_index =
990 new_sctp_conn - tm->connections[my_thread_index];
991 new_sctp_conn->sub_conn[idx].c_thread_index =
993 new_sctp_conn->sub_conn[idx].PMTU =
994 sctp_conn->sub_conn[idx].PMTU;
995 new_sctp_conn->sub_conn[idx].subconn_idx = idx;
997 if (sctp_half_open_connection_cleanup (sctp_conn))
1000 ("Cannot cleanup half-open connection; not the owning thread");
1003 sctp_connection_timers_init (new_sctp_conn);
1006 sctp_handle_init_ack (sctp_hdr, sctp_chunk_hdr,
1007 new_sctp_conn, idx, b0,
1008 sctp_implied_length);
1010 sctp_init_cwnd (new_sctp_conn);
1012 if (session_stream_connect_notify
1013 (&new_sctp_conn->sub_conn[idx].connection, 0))
1016 ("conn_index = %u: session_stream_connect_notify error; cleaning up connection",
1017 new_sctp_conn->sub_conn[idx].connection.c_index);
1018 sctp_connection_cleanup (new_sctp_conn);
1021 next0 = sctp_next_output (is_ip4);
1025 case OPERATION_ERROR:
1027 sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0,
1031 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1032 * are handled by the input-dispatcher function using the table-lookup
1033 * hence we should never get to the "default" case below.
1036 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1037 next0 = sctp_next_drop (is_ip4);
1041 if (error0 != SCTP_ERROR_NONE)
1043 clib_warning ("error while parsing chunk");
1044 sctp_connection_cleanup (sctp_conn);
1045 next0 = sctp_next_drop (is_ip4);
1050 b0->error = node->errors[error0];
1051 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1053 sctp_rx_trace_t *t0 =
1054 vlib_add_trace (vm, node, b0, sizeof (*t0));
1055 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
1058 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1059 n_left_to_next, bi0, next0);
1062 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1064 return from_frame->n_vectors;
1068 sctp4_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1069 vlib_frame_t * from_frame)
1071 return sctp46_rcv_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1075 sctp6_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1076 vlib_frame_t * from_frame)
1078 return sctp46_rcv_phase_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1082 format_sctp_rx_trace_short (u8 * s, va_list * args)
1084 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1085 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1086 sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
1088 s = format (s, "%d -> %d (%U)",
1089 clib_net_to_host_u16 (t->sctp_header.src_port),
1090 clib_net_to_host_u16 (t->sctp_header.dst_port),
1091 format_sctp_state, t->sctp_connection.state);
1097 VLIB_REGISTER_NODE (sctp4_rcv_phase_node) =
1099 .function = sctp4_rcv_phase,
1100 .name = "sctp4-rcv",
1101 /* Takes a vector of packets. */
1102 .vector_size = sizeof (u32),
1103 .n_errors = SCTP_N_ERROR,
1104 .error_strings = sctp_error_strings,
1105 .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1108 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1109 foreach_sctp_state_next
1112 .format_trace = format_sctp_rx_trace_short,
1116 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_rcv_phase_node, sctp4_rcv_phase);
1119 VLIB_REGISTER_NODE (sctp6_init_phase_node) =
1121 .function = sctp6_rcv_phase,
1122 .name = "sctp6-rcv",
1123 /* Takes a vector of packets. */
1124 .vector_size = sizeof (u32),
1125 .n_errors = SCTP_N_ERROR,
1126 .error_strings = sctp_error_strings,
1127 .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1130 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1131 foreach_sctp_state_next
1134 .format_trace = format_sctp_rx_trace_short,
1138 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_init_phase_node, sctp6_rcv_phase);
1140 vlib_node_registration_t sctp4_shutdown_phase_node;
1141 vlib_node_registration_t sctp6_shutdown_phase_node;
1144 sctp_handle_shutdown (sctp_header_t * sctp_hdr,
1145 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1146 sctp_connection_t * sctp_conn, u8 idx,
1147 vlib_buffer_t * b0, u16 sctp_implied_length,
1150 sctp_shutdown_association_chunk_t *shutdown_chunk =
1151 (sctp_shutdown_association_chunk_t *) (sctp_hdr);
1153 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1154 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1156 return SCTP_ERROR_INVALID_TAG;
1160 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1162 if (sctp_is_bundling (sctp_implied_length, &shutdown_chunk->chunk_hdr))
1163 return SCTP_ERROR_BUNDLING_VIOLATION;
1165 switch (sctp_conn->state)
1167 case SCTP_STATE_ESTABLISHED:
1168 if (sctp_check_outstanding_data_chunks (sctp_conn) == 0)
1169 sctp_conn->state = SCTP_STATE_SHUTDOWN_RECEIVED;
1170 sctp_send_shutdown_ack (sctp_conn, idx, b0);
1173 case SCTP_STATE_SHUTDOWN_SENT:
1174 sctp_send_shutdown_ack (sctp_conn, idx, b0);
1178 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
1180 return SCTP_ERROR_NONE;
1184 sctp_handle_shutdown_ack (sctp_header_t * sctp_hdr,
1185 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1186 sctp_connection_t * sctp_conn, u8 idx,
1187 vlib_buffer_t * b0, u16 sctp_implied_length,
1190 sctp_shutdown_ack_chunk_t *shutdown_ack_chunk =
1191 (sctp_shutdown_ack_chunk_t *) (sctp_hdr);
1193 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1194 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1196 return SCTP_ERROR_INVALID_TAG;
1200 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1202 if (sctp_is_bundling (sctp_implied_length, &shutdown_ack_chunk->chunk_hdr))
1203 return SCTP_ERROR_BUNDLING_VIOLATION;
1205 /* Whether we are in SCTP_STATE_SHUTDOWN_SENT or SCTP_STATE_SHUTDOWN_ACK_SENT
1206 * the reception of a SHUTDOWN_ACK chunk leads to the same actions:
1207 * - STOP T2_SHUTDOWN timer
1208 * - SEND SHUTDOWN_COMPLETE chunk
1210 sctp_timer_reset (sctp_conn, MAIN_SCTP_SUB_CONN_IDX,
1211 SCTP_TIMER_T2_SHUTDOWN);
1213 sctp_send_shutdown_complete (sctp_conn, idx, b0);
1215 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
1217 return SCTP_ERROR_NONE;
1221 sctp_handle_shutdown_complete (sctp_header_t * sctp_hdr,
1222 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1223 sctp_connection_t * sctp_conn, u8 idx,
1224 vlib_buffer_t * b0, u16 sctp_implied_length,
1227 sctp_shutdown_complete_chunk_t *shutdown_complete =
1228 (sctp_shutdown_complete_chunk_t *) (sctp_hdr);
1230 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1231 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1233 return SCTP_ERROR_INVALID_TAG;
1237 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1239 if (sctp_is_bundling (sctp_implied_length, &shutdown_complete->chunk_hdr))
1240 return SCTP_ERROR_BUNDLING_VIOLATION;
1242 sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T2_SHUTDOWN);
1244 stream_session_disconnect_notify (&sctp_conn->sub_conn[idx].connection);
1246 sctp_conn->state = SCTP_STATE_CLOSED;
1248 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1250 return SCTP_ERROR_NONE;
1254 sctp46_shutdown_phase_inline (vlib_main_t * vm,
1255 vlib_node_runtime_t * node,
1256 vlib_frame_t * from_frame, int is_ip4)
1258 u32 n_left_from, next_index, *from, *to_next;
1259 u32 my_thread_index = vm->thread_index;
1261 from = vlib_frame_vector_args (from_frame);
1262 n_left_from = from_frame->n_vectors;
1264 next_index = node->cached_next_index;
1266 while (n_left_from > 0)
1270 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1272 while (n_left_from > 0 && n_left_to_next > 0)
1276 sctp_rx_trace_t *sctp_trace;
1277 sctp_header_t *sctp_hdr = 0;
1278 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1279 ip4_header_t *ip4_hdr = 0;
1280 ip6_header_t *ip6_hdr = 0;
1281 sctp_connection_t *sctp_conn;
1282 u16 sctp_implied_length = 0;
1283 u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_RCV_PHASE_N_NEXT;
1291 n_left_to_next -= 1;
1293 b0 = vlib_get_buffer (vm, bi0);
1295 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1298 if (PREDICT_FALSE (sctp_conn == 0))
1301 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1302 error0 = SCTP_ERROR_INVALID_CONNECTION;
1308 ip4_hdr = vlib_buffer_get_current (b0);
1309 sctp_hdr = ip4_next_header (ip4_hdr);
1310 idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
1314 ip6_hdr = vlib_buffer_get_current (b0);
1315 sctp_hdr = ip6_next_header (ip6_hdr);
1316 idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
1319 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1320 sctp_chunk_hdr = &full_hdr->common_hdr;
1322 sctp_implied_length =
1323 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1325 u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
1330 sctp_handle_shutdown (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1331 idx, b0, sctp_implied_length, &next0);
1336 sctp_handle_shutdown_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1337 idx, b0, sctp_implied_length,
1341 case SHUTDOWN_COMPLETE:
1343 sctp_handle_shutdown_complete (sctp_hdr, sctp_chunk_hdr,
1345 sctp_implied_length, &next0);
1347 sctp_connection_cleanup (sctp_conn);
1351 * DATA chunks can still be transmitted/received in the SHUTDOWN-PENDING
1352 * and SHUTDOWN-SENT states (as per RFC4960 Section 6)
1356 sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
1357 sctp_conn, idx, b0, &next0);
1360 case OPERATION_ERROR:
1362 sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0,
1366 case COOKIE_ECHO: /* Cookie Received While Shutting Down */
1367 sctp_prepare_operation_error (sctp_conn, idx, b0,
1368 COOKIE_RECEIVED_WHILE_SHUTTING_DOWN);
1369 error0 = SCTP_ERROR_NONE;
1370 next0 = sctp_next_output (is_ip4);
1372 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1373 * are handled by the input-dispatcher function using the table-lookup
1374 * hence we should never get to the "default" case below.
1377 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1378 next0 = sctp_next_drop (is_ip4);
1382 if (error0 != SCTP_ERROR_NONE)
1384 clib_warning ("error while parsing chunk");
1385 sctp_connection_cleanup (sctp_conn);
1386 next0 = sctp_next_drop (is_ip4);
1391 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1394 vlib_add_trace (vm, node, b0, sizeof (*sctp_trace));
1396 if (sctp_hdr != NULL)
1397 clib_memcpy (&sctp_trace->sctp_header, sctp_hdr,
1398 sizeof (sctp_trace->sctp_header));
1400 if (sctp_conn != NULL)
1401 clib_memcpy (&sctp_trace->sctp_connection, sctp_conn,
1402 sizeof (sctp_trace->sctp_connection));
1405 b0->error = node->errors[error0];
1407 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1408 n_left_to_next, bi0, next0);
1411 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1414 return from_frame->n_vectors;
1419 sctp4_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1420 vlib_frame_t * from_frame)
1422 return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1426 sctp6_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1427 vlib_frame_t * from_frame)
1429 return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1433 VLIB_REGISTER_NODE (sctp4_shutdown_phase_node) =
1435 .function = sctp4_shutdown_phase,
1436 .name = "sctp4-shutdown",
1437 /* Takes a vector of packets. */
1438 .vector_size = sizeof (u32),
1439 .n_errors = SCTP_N_ERROR,
1440 .error_strings = sctp_error_strings,
1441 .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1444 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1445 foreach_sctp_state_next
1448 .format_trace = format_sctp_rx_trace_short,
1452 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_shutdown_phase_node,
1453 sctp4_shutdown_phase);
1456 VLIB_REGISTER_NODE (sctp6_shutdown_phase_node) =
1458 .function = sctp6_shutdown_phase,
1459 .name = "sctp6-shutdown",
1460 /* Takes a vector of packets. */
1461 .vector_size = sizeof (u32),
1462 .n_errors = SCTP_N_ERROR,
1463 .error_strings = sctp_error_strings,
1464 .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1467 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1468 foreach_sctp_state_next
1471 .format_trace = format_sctp_rx_trace_short,
1475 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_shutdown_phase_node,
1476 sctp6_shutdown_phase);
1478 vlib_node_registration_t sctp4_listen_phase_node;
1479 vlib_node_registration_t sctp6_listen_phase_node;
1481 vlib_node_registration_t sctp4_established_phase_node;
1482 vlib_node_registration_t sctp6_established_phase_node;
1485 sctp_handle_sack (sctp_selective_ack_chunk_t * sack_chunk,
1486 sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b0,
1489 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1490 if (sctp_conn->local_tag != sack_chunk->sctp_hdr.verification_tag)
1492 return SCTP_ERROR_INVALID_TAG;
1495 sctp_conn->sub_conn[idx].last_seen = sctp_time_now ();
1497 /* Section 7.2.2; point (2) */
1498 if (sctp_conn->sub_conn[idx].cwnd > sctp_conn->sub_conn[idx].ssthresh)
1499 sctp_conn->sub_conn[idx].partially_acked_bytes =
1500 sctp_conn->next_tsn - sack_chunk->cumulative_tsn_ack;
1502 /* Section 7.2.2; point (5) */
1503 if (sctp_conn->next_tsn - sack_chunk->cumulative_tsn_ack == 0)
1504 sctp_conn->sub_conn[idx].partially_acked_bytes = 0;
1506 sctp_conn->last_unacked_tsn = sack_chunk->cumulative_tsn_ack;
1508 sctp_calculate_rto (sctp_conn, idx);
1510 sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T3_RXTX,
1511 sctp_conn->sub_conn[idx].RTO);
1513 sctp_conn->sub_conn[idx].RTO_pending = 0;
1515 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1517 return SCTP_ERROR_NONE;
1521 sctp_handle_heartbeat (sctp_hb_req_chunk_t * sctp_hb_chunk,
1522 sctp_connection_t * sctp_conn, u8 idx,
1523 vlib_buffer_t * b0, u16 * next0)
1525 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1526 if (sctp_conn->local_tag != sctp_hb_chunk->sctp_hdr.verification_tag)
1528 return SCTP_ERROR_INVALID_TAG;
1531 sctp_prepare_heartbeat_ack_chunk (sctp_conn, idx, b0);
1533 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].connection.is_ip4);
1535 return SCTP_ERROR_NONE;
1539 sctp_handle_heartbeat_ack (sctp_hb_ack_chunk_t * sctp_hb_ack_chunk,
1540 sctp_connection_t * sctp_conn, u8 idx,
1541 vlib_buffer_t * b0, u16 * next0)
1543 sctp_conn->sub_conn[idx].last_seen = sctp_time_now ();
1545 sctp_conn->sub_conn[idx].unacknowledged_hb -= 1;
1547 sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
1548 sctp_conn->sub_conn[idx].RTO);
1550 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1552 return SCTP_ERROR_NONE;
1556 sctp_node_inc_counter (vlib_main_t * vm, u32 sctp4_node, u32 sctp6_node,
1557 u8 is_ip4, u8 evt, u8 val)
1559 if (PREDICT_TRUE (!val))
1563 vlib_node_increment_counter (vm, sctp4_node, evt, val);
1565 vlib_node_increment_counter (vm, sctp6_node, evt, val);
1569 sctp46_listen_process_inline (vlib_main_t * vm,
1570 vlib_node_runtime_t * node,
1571 vlib_frame_t * from_frame, int is_ip4)
1573 u32 n_left_from, next_index, *from, *to_next;
1574 u32 my_thread_index = vm->thread_index;
1576 from = vlib_frame_vector_args (from_frame);
1577 n_left_from = from_frame->n_vectors;
1579 next_index = node->cached_next_index;
1581 while (n_left_from > 0)
1585 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1587 while (n_left_from > 0 && n_left_to_next > 0)
1591 sctp_header_t *sctp_hdr = 0;
1592 ip4_header_t *ip4_hdr;
1593 ip6_header_t *ip6_hdr;
1594 sctp_connection_t *child_conn;
1595 sctp_connection_t *sctp_listener;
1596 u16 next0 = sctp_next_drop (is_ip4), error0 = SCTP_ERROR_ENQUEUED;
1603 n_left_to_next -= 1;
1605 b0 = vlib_get_buffer (vm, bi0);
1607 sctp_listener_get (vnet_buffer (b0)->sctp.connection_index);
1611 ip4_hdr = vlib_buffer_get_current (b0);
1612 sctp_hdr = ip4_next_header (ip4_hdr);
1616 ip6_hdr = vlib_buffer_get_current (b0);
1617 sctp_hdr = ip6_next_header (ip6_hdr);
1621 sctp_lookup_connection (sctp_listener->sub_conn
1622 [MAIN_SCTP_SUB_CONN_IDX].c_fib_index, b0,
1623 my_thread_index, is_ip4);
1625 if (PREDICT_FALSE (child_conn->state != SCTP_STATE_CLOSED))
1628 ("conn_index = %u: child_conn->state != SCTP_STATE_CLOSED.... STATE=%s",
1629 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
1631 sctp_state_to_string (child_conn->state));
1632 error0 = SCTP_ERROR_CREATE_EXISTS;
1636 /* Create child session and send SYN-ACK */
1637 child_conn = sctp_connection_new (my_thread_index);
1638 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].subconn_idx =
1639 MAIN_SCTP_SUB_CONN_IDX;
1640 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_port =
1642 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_port =
1644 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_is_ip4 = is_ip4;
1645 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.proto =
1646 sctp_listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.proto;
1647 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].PMTU =
1648 sctp_listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].PMTU;
1649 child_conn->state = SCTP_STATE_CLOSED;
1653 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_ip4.as_u32 =
1654 ip4_hdr->dst_address.as_u32;
1655 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_ip4.as_u32 =
1656 ip4_hdr->src_address.as_u32;
1660 clib_memcpy (&child_conn->
1661 sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_ip6,
1662 &ip6_hdr->dst_address, sizeof (ip6_address_t));
1663 clib_memcpy (&child_conn->
1664 sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_ip6,
1665 &ip6_hdr->src_address, sizeof (ip6_address_t));
1668 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1669 sctp_chunks_common_hdr_t *sctp_chunk_hdr = &full_hdr->common_hdr;
1671 u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
1672 if (chunk_type != INIT)
1675 ("conn_index = %u: chunk_type != INIT... chunk_type=%s",
1676 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
1677 connection.c_index, sctp_chunk_to_string (chunk_type));
1679 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1680 next0 = sctp_next_drop (is_ip4);
1684 u16 sctp_implied_length =
1685 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1690 sctp_connection_timers_init (child_conn);
1692 sctp_init_snd_vars (child_conn);
1695 sctp_handle_init (sctp_hdr, sctp_chunk_hdr, child_conn, b0,
1696 sctp_implied_length);
1698 sctp_init_cwnd (child_conn);
1700 if (error0 == SCTP_ERROR_NONE)
1702 if (stream_session_accept
1704 sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection,
1706 sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_s_index, 0))
1708 clib_warning ("session accept fail");
1709 sctp_connection_cleanup (child_conn);
1710 error0 = SCTP_ERROR_CREATE_SESSION_FAIL;
1713 next0 = sctp_next_output (is_ip4);
1717 /* Reception of a DATA chunk whilst in the CLOSED state is called
1718 * "Out of the Blue" packet and handling of the chunk needs special treatment
1719 * as per RFC4960 section 8.4
1724 case OPERATION_ERROR:
1726 sctp_handle_operation_err (sctp_hdr, child_conn,
1727 MAIN_SCTP_SUB_CONN_IDX, b0,
1733 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1735 sctp_rx_trace_t *t0 =
1736 vlib_add_trace (vm, node, b0, sizeof (*t0));
1737 clib_memcpy (&t0->sctp_header, sctp_hdr,
1738 sizeof (t0->sctp_header));
1739 clib_memcpy (&t0->sctp_connection, sctp_listener,
1740 sizeof (t0->sctp_connection));
1743 b0->error = node->errors[error0];
1745 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1746 n_left_to_next, bi0, next0);
1748 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1751 return from_frame->n_vectors;
1755 sctp4_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1756 vlib_frame_t * from_frame)
1758 return sctp46_listen_process_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1762 sctp6_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1763 vlib_frame_t * from_frame)
1765 return sctp46_listen_process_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1769 sctp46_established_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1770 vlib_frame_t * from_frame, int is_ip4)
1772 u32 n_left_from, next_index, *from, *to_next;
1773 u32 my_thread_index = vm->thread_index, errors = 0;
1775 from = vlib_frame_vector_args (from_frame);
1776 n_left_from = from_frame->n_vectors;
1778 next_index = node->cached_next_index;
1780 while (n_left_from > 0)
1784 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1786 while (n_left_from > 0 && n_left_to_next > 0)
1790 sctp_header_t *sctp_hdr = 0;
1791 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1792 ip4_header_t *ip4_hdr = 0;
1793 ip6_header_t *ip6_hdr = 0;
1794 sctp_connection_t *sctp_conn;
1795 u16 error0 = SCTP_ERROR_ENQUEUED, next0 =
1796 SCTP_ESTABLISHED_PHASE_N_NEXT;
1804 n_left_to_next -= 1;
1806 b0 = vlib_get_buffer (vm, bi0);
1808 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1811 if (PREDICT_FALSE (sctp_conn == 0))
1814 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1815 error0 = SCTP_ERROR_INVALID_CONNECTION;
1820 ip4_hdr = vlib_buffer_get_current (b0);
1821 sctp_hdr = ip4_next_header (ip4_hdr);
1822 idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
1826 ip6_hdr = vlib_buffer_get_current (b0);
1827 sctp_hdr = ip6_next_header (ip6_hdr);
1828 idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
1831 sctp_conn->sub_conn[idx].subconn_idx = idx;
1833 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1835 (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
1837 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
1843 sctp_handle_cookie_echo (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1849 sctp_handle_cookie_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1855 sctp_handle_sack ((sctp_selective_ack_chunk_t *) sctp_hdr,
1856 sctp_conn, idx, b0, &next0);
1861 sctp_handle_heartbeat ((sctp_hb_req_chunk_t *) sctp_hdr,
1862 sctp_conn, idx, b0, &next0);
1867 sctp_handle_heartbeat_ack ((sctp_hb_ack_chunk_t *) sctp_hdr,
1868 sctp_conn, idx, b0, &next0);
1873 sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
1874 sctp_conn, idx, b0, &next0);
1877 case OPERATION_ERROR:
1879 sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0,
1883 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1884 * are handled by the input-dispatcher function using the table-lookup
1885 * hence we should never get to the "default" case below.
1888 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1889 next0 = sctp_next_drop (is_ip4);
1894 b0->error = node->errors[error0];
1895 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1897 sctp_rx_trace_t *t0 =
1898 vlib_add_trace (vm, node, b0, sizeof (*t0));
1899 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
1902 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1903 n_left_to_next, bi0, next0);
1906 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1909 errors = session_manager_flush_enqueue_events (TRANSPORT_PROTO_SCTP,
1912 sctp_node_inc_counter (vm, is_ip4, sctp4_established_phase_node.index,
1913 sctp6_established_phase_node.index,
1914 SCTP_ERROR_EVENT_FIFO_FULL, errors);
1915 sctp_flush_frame_to_output (vm, my_thread_index, is_ip4);
1917 return from_frame->n_vectors;
1921 sctp4_established_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1922 vlib_frame_t * from_frame)
1924 return sctp46_established_phase_inline (vm, node, from_frame,
1929 sctp6_established_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1930 vlib_frame_t * from_frame)
1932 return sctp46_established_phase_inline (vm, node, from_frame,
1937 format_sctp_rx_trace (u8 * s, va_list * args)
1939 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1940 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1941 sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
1942 u32 indent = format_get_indent (s);
1944 s = format (s, "%U\n%U%U",
1945 format_sctp_header, &t->sctp_header, 128,
1946 format_white_space, indent,
1947 format_sctp_connection, &t->sctp_connection, 1);
1953 VLIB_REGISTER_NODE (sctp4_listen_phase_node) =
1955 .function = sctp4_listen_phase,
1956 .name = "sctp4-listen",
1957 /* Takes a vector of packets. */
1958 .vector_size = sizeof (u32),
1959 .n_errors = SCTP_N_ERROR,
1960 .error_strings = sctp_error_strings,
1961 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
1964 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
1965 foreach_sctp_state_next
1968 .format_trace = format_sctp_rx_trace_short,
1972 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_listen_phase_node, sctp4_listen_phase);
1975 VLIB_REGISTER_NODE (sctp6_listen_phase_node) =
1977 .function = sctp6_listen_phase,
1978 .name = "sctp6-listen",
1979 /* Takes a vector of packets. */
1980 .vector_size = sizeof (u32),
1981 .n_errors = SCTP_N_ERROR,
1982 .error_strings = sctp_error_strings,
1983 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
1986 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
1987 foreach_sctp_state_next
1990 .format_trace = format_sctp_rx_trace_short,
1994 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_listen_phase_node, sctp6_listen_phase);
1997 VLIB_REGISTER_NODE (sctp4_established_phase_node) =
1999 .function = sctp4_established_phase,
2000 .name = "sctp4-established",
2001 /* Takes a vector of packets. */
2002 .vector_size = sizeof (u32),
2003 .n_errors = SCTP_N_ERROR,
2004 .error_strings = sctp_error_strings,
2005 .n_next_nodes = SCTP_ESTABLISHED_PHASE_N_NEXT,
2008 #define _(s,n) [SCTP_ESTABLISHED_PHASE_NEXT_##s] = n,
2009 foreach_sctp_state_next
2012 .format_trace = format_sctp_rx_trace_short,
2016 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_established_phase_node,
2017 sctp4_established_phase);
2020 VLIB_REGISTER_NODE (sctp6_established_phase_node) =
2022 .function = sctp6_established_phase,
2023 .name = "sctp6-established",
2024 /* Takes a vector of packets. */
2025 .vector_size = sizeof (u32),
2026 .n_errors = SCTP_N_ERROR,
2027 .error_strings = sctp_error_strings,
2028 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
2031 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
2032 foreach_sctp_state_next
2035 .format_trace = format_sctp_rx_trace_short,
2039 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_established_phase_node,
2040 sctp6_established_phase);
2043 * This is the function executed first for the SCTP graph.
2044 * It takes care of doing the initial message parsing and
2045 * dispatch to the specialized function.
2048 sctp46_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2049 vlib_frame_t * from_frame, int is_ip4)
2051 u32 n_left_from, next_index, *from, *to_next;
2052 u32 my_thread_index = vm->thread_index;
2054 sctp_main_t *tm = vnet_get_sctp_main ();
2056 from = vlib_frame_vector_args (from_frame);
2057 n_left_from = from_frame->n_vectors;
2058 next_index = node->cached_next_index;
2059 sctp_set_time_now (my_thread_index);
2061 while (n_left_from > 0)
2065 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2067 while (n_left_from > 0 && n_left_to_next > 0)
2069 int n_advance_bytes0, n_data_bytes0;
2070 u32 bi0, fib_index0;
2072 sctp_header_t *sctp_hdr = 0;
2073 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
2074 sctp_connection_t *sctp_conn;
2075 transport_connection_t *trans_conn;
2076 ip4_header_t *ip4_hdr;
2077 ip6_header_t *ip6_hdr;
2078 u32 error0 = SCTP_ERROR_NO_LISTENER, next0 = SCTP_INPUT_NEXT_DROP;
2085 n_left_to_next -= 1;
2087 b0 = vlib_get_buffer (vm, bi0);
2088 vnet_buffer (b0)->sctp.flags = 0;
2089 fib_index0 = vnet_buffer (b0)->ip.fib_index;
2091 /* Checksum computed by ipx_local no need to compute again */
2095 ip4_hdr = vlib_buffer_get_current (b0);
2096 sctp_hdr = ip4_next_header (ip4_hdr);
2098 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
2099 sctp_chunk_hdr = &full_hdr->common_hdr;
2102 (ip4_header_bytes (ip4_hdr) +
2103 sizeof (sctp_payload_data_chunk_t));
2105 clib_net_to_host_u16 (ip4_hdr->length) - n_advance_bytes0;
2107 trans_conn = session_lookup_connection_wt4 (fib_index0,
2108 &ip4_hdr->dst_address,
2109 &ip4_hdr->src_address,
2112 TRANSPORT_PROTO_SCTP,
2118 ip6_hdr = vlib_buffer_get_current (b0);
2119 sctp_hdr = ip6_next_header (ip6_hdr);
2121 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
2122 sctp_chunk_hdr = &full_hdr->common_hdr;
2124 n_advance_bytes0 = sctp_header_bytes ();
2126 clib_net_to_host_u16 (ip6_hdr->payload_length) -
2128 n_advance_bytes0 += sizeof (ip6_hdr[0]);
2130 trans_conn = session_lookup_connection_wt6 (fib_index0,
2131 &ip6_hdr->dst_address,
2132 &ip6_hdr->src_address,
2135 TRANSPORT_PROTO_SCTP,
2141 if (PREDICT_FALSE (n_advance_bytes0 < 0))
2143 error0 = SCTP_ERROR_LENGTH;
2147 sctp_conn = sctp_get_connection_from_transport (trans_conn);
2148 vnet_sctp_common_hdr_params_net_to_host (sctp_chunk_hdr);
2150 u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
2151 if (chunk_type >= UNKNOWN)
2154 ("Received an unrecognized chunk; sending back OPERATION_ERROR chunk");
2156 sctp_prepare_operation_error (sctp_conn, MAIN_SCTP_SUB_CONN_IDX,
2157 b0, UNRECOGNIZED_CHUNK_TYPE);
2159 error0 = SCTP_ERROR_UNKOWN_CHUNK;
2160 next0 = sctp_next_output (is_ip4);
2164 vnet_buffer (b0)->sctp.hdr_offset =
2165 (u8 *) sctp_hdr - (u8 *) vlib_buffer_get_current (b0);
2167 /* Session exists */
2168 if (PREDICT_TRUE (0 != sctp_conn))
2170 /* Save connection index */
2171 vnet_buffer (b0)->sctp.connection_index = trans_conn->c_index;
2172 vnet_buffer (b0)->sctp.data_offset = n_advance_bytes0;
2173 vnet_buffer (b0)->sctp.data_len = n_data_bytes0;
2175 next0 = tm->dispatch_table[sctp_conn->state][chunk_type].next;
2176 error0 = tm->dispatch_table[sctp_conn->state][chunk_type].error;
2178 SCTP_DBG_STATE_MACHINE
2179 ("S_INDEX = %u, C_INDEX = %u, TRANS_CONN = %p, SCTP_CONN = %p, CURRENT_CONNECTION_STATE = %s,"
2180 "CHUNK_TYPE_RECEIVED = %s " "NEXT_PHASE = %s",
2181 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
2183 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
2184 connection.c_index, trans_conn, sctp_conn,
2185 sctp_state_to_string (sctp_conn->state),
2186 sctp_chunk_to_string (chunk_type), phase_to_string (next0));
2188 if (chunk_type == DATA)
2189 SCTP_ADV_DBG ("n_advance_bytes0 = %u, n_data_bytes0 = %u",
2190 n_advance_bytes0, n_data_bytes0);
2197 next0 = SCTP_INPUT_NEXT_DROP;
2198 error0 = SCTP_ERROR_FILTERED;
2200 else if ((is_ip4 && tm->punt_unknown4) ||
2201 (!is_ip4 && tm->punt_unknown6))
2203 next0 = SCTP_INPUT_NEXT_PUNT_PHASE;
2204 error0 = SCTP_ERROR_PUNT;
2208 next0 = SCTP_INPUT_NEXT_DROP;
2209 error0 = SCTP_ERROR_NO_LISTENER;
2211 SCTP_DBG_STATE_MACHINE ("sctp_conn == NULL, NEXT_PHASE = %s",
2212 phase_to_string (next0));
2217 b0->error = error0 ? node->errors[error0] : 0;
2219 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2221 sctp_rx_trace_t *t0 =
2222 vlib_add_trace (vm, node, b0, sizeof (*t0));
2223 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
2225 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2226 n_left_to_next, bi0, next0);
2229 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2231 return from_frame->n_vectors;
2235 sctp4_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2236 vlib_frame_t * from_frame)
2238 return sctp46_input_dispatcher (vm, node, from_frame, 1 /* is_ip4 */ );
2242 sctp6_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2243 vlib_frame_t * from_frame)
2245 return sctp46_input_dispatcher (vm, node, from_frame, 0 /* is_ip4 */ );
2249 VLIB_REGISTER_NODE (sctp4_input_node) =
2251 .function = sctp4_input_dispatcher,
2252 .name = "sctp4-input",
2253 /* Takes a vector of packets. */
2254 .vector_size = sizeof (u32),
2255 .n_errors = SCTP_N_ERROR,
2256 .error_strings = sctp_error_strings,
2257 .n_next_nodes = SCTP_INPUT_N_NEXT,
2260 #define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
2261 foreach_sctp4_input_next
2264 .format_buffer = format_sctp_header,
2265 .format_trace = format_sctp_rx_trace,
2269 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_input_node, sctp4_input_dispatcher);
2272 VLIB_REGISTER_NODE (sctp6_input_node) =
2274 .function = sctp6_input_dispatcher,
2275 .name = "sctp6-input",
2276 /* Takes a vector of packets. */
2277 .vector_size = sizeof (u32),
2278 .n_errors = SCTP_N_ERROR,
2279 .error_strings = sctp_error_strings,
2280 .n_next_nodes = SCTP_INPUT_N_NEXT,
2283 #define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
2284 foreach_sctp6_input_next
2287 .format_buffer = format_sctp_header,
2288 .format_trace = format_sctp_rx_trace,
2292 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_input_node, sctp6_input_dispatcher);
2294 vlib_node_registration_t sctp4_input_node;
2295 vlib_node_registration_t sctp6_input_node;
2298 sctp_dispatch_table_init (sctp_main_t * tm)
2301 for (i = 0; i < ARRAY_LEN (tm->dispatch_table); i++)
2302 for (j = 0; j < ARRAY_LEN (tm->dispatch_table[i]); j++)
2304 tm->dispatch_table[i][j].next = SCTP_INPUT_NEXT_DROP;
2305 tm->dispatch_table[i][j].error = SCTP_ERROR_DISPATCH;
2308 #define _(t,f,n,e) \
2310 tm->dispatch_table[SCTP_STATE_##t][f].next = (n); \
2311 tm->dispatch_table[SCTP_STATE_##t][f].error = (e); \
2315 * SCTP STATE-MACHINE states:
2317 * _(CLOSED, "CLOSED") \
2318 * _(COOKIE_WAIT, "COOKIE_WAIT") \
2319 * _(COOKIE_ECHOED, "COOKIE_ECHOED") \
2320 * _(ESTABLISHED, "ESTABLISHED") \
2321 * _(SHUTDOWN_PENDING, "SHUTDOWN_PENDING") \
2322 * _(SHUTDOWN_SENT, "SHUTDOWN_SENT") \
2323 * _(SHUTDOWN_RECEIVED, "SHUTDOWN_RECEIVED") \
2324 * _(SHUTDOWN_ACK_SENT, "SHUTDOWN_ACK_SENT")
2326 //_(CLOSED, DATA, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */
2327 _(CLOSED, INIT, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2328 _(CLOSED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2329 _(CLOSED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2330 _(CLOSED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2331 _(CLOSED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2332 _(CLOSED, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2333 _(CLOSED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2334 _(CLOSED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2335 _(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2336 _(CLOSED, COOKIE_ECHO, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2337 _(CLOSED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2338 _(CLOSED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2339 _(CLOSED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2340 _(CLOSED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2341 _(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2343 _(COOKIE_WAIT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */
2344 _(COOKIE_WAIT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2345 _(COOKIE_WAIT, INIT_ACK, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2346 _(COOKIE_WAIT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2347 _(COOKIE_WAIT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2348 _(COOKIE_WAIT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2349 _(COOKIE_WAIT, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2350 _(COOKIE_WAIT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2351 _(COOKIE_WAIT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2352 _(COOKIE_WAIT, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2353 _(COOKIE_WAIT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2354 _(COOKIE_WAIT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2355 _(COOKIE_WAIT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2356 _(COOKIE_WAIT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2357 _(COOKIE_WAIT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2358 _(COOKIE_WAIT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2361 _(COOKIE_ECHOED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE);
2362 _(COOKIE_ECHOED, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2363 _(COOKIE_ECHOED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2364 _(COOKIE_ECHOED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2365 _(COOKIE_ECHOED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2366 _(COOKIE_ECHOED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2367 _(COOKIE_ECHOED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2368 _(COOKIE_ECHOED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2369 _(COOKIE_ECHOED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2370 _(COOKIE_ECHOED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2371 _(COOKIE_ECHOED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2372 _(COOKIE_ECHOED, COOKIE_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2374 _(COOKIE_ECHOED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2375 _(COOKIE_ECHOED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2376 _(COOKIE_ECHOED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2377 _(COOKIE_ECHOED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2380 _(ESTABLISHED, DATA, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2381 _(ESTABLISHED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2382 _(ESTABLISHED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2383 _(ESTABLISHED, SACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2384 _(ESTABLISHED, HEARTBEAT, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2386 _(ESTABLISHED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2388 _(ESTABLISHED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2389 _(ESTABLISHED, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2390 _(ESTABLISHED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2391 _(ESTABLISHED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2392 _(ESTABLISHED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2393 _(ESTABLISHED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2394 _(ESTABLISHED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2395 _(ESTABLISHED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2396 _(ESTABLISHED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2397 _(ESTABLISHED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2400 _(SHUTDOWN_PENDING, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2401 _(SHUTDOWN_PENDING, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2402 _(SHUTDOWN_PENDING, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2403 _(SHUTDOWN_PENDING, SACK, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2404 _(SHUTDOWN_PENDING, HEARTBEAT, SCTP_INPUT_NEXT_LISTEN_PHASE,
2406 _(SHUTDOWN_PENDING, HEARTBEAT_ACK, SCTP_INPUT_NEXT_LISTEN_PHASE,
2408 _(SHUTDOWN_PENDING, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2409 _(SHUTDOWN_PENDING, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2411 _(SHUTDOWN_PENDING, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2412 _(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2413 _(SHUTDOWN_PENDING, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2415 _(SHUTDOWN_PENDING, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2416 _(SHUTDOWN_PENDING, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2417 _(SHUTDOWN_PENDING, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2418 _(SHUTDOWN_PENDING, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2419 _(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2422 _(SHUTDOWN_SENT, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2423 _(SHUTDOWN_SENT, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2424 _(SHUTDOWN_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2425 _(SHUTDOWN_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2426 _(SHUTDOWN_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2427 _(SHUTDOWN_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2428 _(SHUTDOWN_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2429 _(SHUTDOWN_SENT, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2430 _(SHUTDOWN_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2432 _(SHUTDOWN_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2434 _(SHUTDOWN_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2435 _(SHUTDOWN_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2436 _(SHUTDOWN_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2437 _(SHUTDOWN_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2438 _(SHUTDOWN_SENT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2441 _(SHUTDOWN_RECEIVED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2442 _(SHUTDOWN_RECEIVED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2443 _(SHUTDOWN_RECEIVED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2444 _(SHUTDOWN_RECEIVED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2445 _(SHUTDOWN_RECEIVED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2446 _(SHUTDOWN_RECEIVED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2447 _(SHUTDOWN_RECEIVED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2448 _(SHUTDOWN_RECEIVED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2449 _(SHUTDOWN_RECEIVED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2451 _(SHUTDOWN_RECEIVED, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2453 _(SHUTDOWN_RECEIVED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2454 _(SHUTDOWN_RECEIVED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2455 _(SHUTDOWN_RECEIVED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2456 _(SHUTDOWN_RECEIVED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2457 _(SHUTDOWN_RECEIVED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2460 _(SHUTDOWN_ACK_SENT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2461 _(SHUTDOWN_ACK_SENT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk */
2462 _(SHUTDOWN_ACK_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2463 _(SHUTDOWN_ACK_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2464 _(SHUTDOWN_ACK_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2465 _(SHUTDOWN_ACK_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2466 _(SHUTDOWN_ACK_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2467 _(SHUTDOWN_ACK_SENT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2468 _(SHUTDOWN_ACK_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2469 _(SHUTDOWN_ACK_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2471 _(SHUTDOWN_ACK_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2472 _(SHUTDOWN_ACK_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2473 _(SHUTDOWN_ACK_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2474 _(SHUTDOWN_ACK_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2476 _(SHUTDOWN_ACK_SENT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2479 /* TODO: Handle COOKIE ECHO when a TCB Exists */
2485 sctp_input_init (vlib_main_t * vm)
2487 clib_error_t *error = 0;
2488 sctp_main_t *tm = vnet_get_sctp_main ();
2490 if ((error = vlib_call_init_function (vm, sctp_init)))
2493 /* Initialize dispatch table. */
2494 sctp_dispatch_table_init (tm);
2499 VLIB_INIT_FUNCTION (sctp_input_init);
2502 * fd.io coding-style-patch-verification: ON
2505 * eval: (c-set-style "gnu")