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_init (sctp_header_t * sctp_hdr,
287 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
288 sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
289 u16 sctp_implied_length)
291 sctp_init_chunk_t *init_chunk = (sctp_init_chunk_t *) (sctp_hdr);
292 ip4_address_t *ip4_addr = 0;
293 ip6_address_t *ip6_addr = 0;
294 char hostname[FQDN_MAX_LENGTH];
296 /* Check the current state of the connection
298 * The logic required by the RFC4960 Section 5.2.2 is already taken care of
299 * in the code below and by the "sctp_prepare_initack_chunk" function.
300 * However, for debugging purposes it is nice to have a message printed out
301 * for these corner-case scenarios.
303 if (sctp_conn->state != SCTP_STATE_CLOSED)
304 { /* UNEXPECTED scenario */
305 switch (sctp_conn->state)
307 case SCTP_STATE_COOKIE_WAIT: /* TODO */
308 SCTP_ADV_DBG ("Received INIT chunk while in COOKIE_WAIT state");
310 case SCTP_STATE_COOKIE_ECHOED: /* TODO */
311 SCTP_ADV_DBG ("Received INIT chunk while in COOKIE_ECHOED state");
316 if (sctp_hdr->verification_tag != 0x0)
317 return SCTP_ERROR_INVALID_TAG_FOR_INIT;
320 * It is not possible to bundle any other CHUNK with the INIT chunk
322 if (sctp_is_bundling (sctp_implied_length, &init_chunk->chunk_hdr))
323 return SCTP_ERROR_BUNDLING_VIOLATION;
325 /* Save the INITIATE_TAG of the remote peer for this connection:
326 * it MUST be used for the VERIFICATION_TAG parameter in the SCTP HEADER */
327 sctp_conn->remote_tag = init_chunk->initiate_tag;
328 sctp_conn->remote_initial_tsn =
329 clib_net_to_host_u32 (init_chunk->initial_tsn);
330 sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn;
331 sctp_conn->next_tsn_expected = sctp_conn->remote_initial_tsn + 1;
332 SCTP_CONN_TRACKING_DBG ("sctp_conn->remote_initial_tsn = %u",
333 sctp_conn->remote_initial_tsn);
335 sctp_conn->snd_opts.a_rwnd = clib_net_to_host_u32 (init_chunk->a_rwnd);
338 * If the length specified in the INIT message is bigger than the size in bytes of our structure it means that
339 * optional parameters have been sent with the INIT chunk and we need to parse them.
341 u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr);
342 if (length > sizeof (sctp_init_chunk_t))
344 /* There are optional parameters in the INIT chunk */
345 u16 pointer_offset = sizeof (sctp_init_chunk_t);
346 while (pointer_offset < length)
348 sctp_opt_params_hdr_t *opt_params_hdr =
349 (sctp_opt_params_hdr_t *) init_chunk + pointer_offset;
351 switch (clib_net_to_host_u16 (opt_params_hdr->type))
353 case SCTP_IPV4_ADDRESS_TYPE:
355 sctp_ipv4_addr_param_t *ipv4 =
356 (sctp_ipv4_addr_param_t *) opt_params_hdr;
357 clib_memcpy (ip4_addr, &ipv4->address,
358 sizeof (ip4_address_t));
360 sctp_sub_connection_add_ip4 (vlib_get_thread_index (), ipv4);
364 case SCTP_IPV6_ADDRESS_TYPE:
366 sctp_ipv6_addr_param_t *ipv6 =
367 (sctp_ipv6_addr_param_t *) opt_params_hdr;
368 clib_memcpy (ip6_addr, &ipv6->address,
369 sizeof (ip6_address_t));
371 sctp_sub_connection_add_ip6 (vlib_get_thread_index (), ipv6);
375 case SCTP_COOKIE_PRESERVATIVE_TYPE:
377 sctp_cookie_preservative_param_t *cookie_pres =
378 (sctp_cookie_preservative_param_t *) opt_params_hdr;
379 sctp_conn->peer_cookie_life_span_increment =
380 cookie_pres->life_span_inc;
383 case SCTP_HOSTNAME_ADDRESS_TYPE:
385 sctp_hostname_param_t *hostname_addr =
386 (sctp_hostname_param_t *) opt_params_hdr;
387 clib_memcpy (hostname, hostname_addr->hostname,
391 case SCTP_SUPPORTED_ADDRESS_TYPES:
397 pointer_offset += clib_net_to_host_u16 (opt_params_hdr->length);
401 /* Reuse buffer to make init-ack and send */
402 sctp_prepare_initack_chunk (sctp_conn, MAIN_SCTP_SUB_CONN_IDX, b0, ip4_addr,
404 return SCTP_ERROR_NONE;
408 sctp_is_valid_init_ack (sctp_header_t * sctp_hdr,
409 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
410 sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
411 u16 sctp_implied_length)
413 sctp_init_ack_chunk_t *init_ack_chunk =
414 (sctp_init_ack_chunk_t *) (sctp_hdr);
416 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
417 if (sctp_conn->local_tag != init_ack_chunk->sctp_hdr.verification_tag)
419 return SCTP_ERROR_INVALID_TAG;
423 * It is not possible to bundle any other CHUNK with the INIT_ACK chunk
425 if (sctp_is_bundling (sctp_implied_length, &init_ack_chunk->chunk_hdr))
426 return SCTP_ERROR_BUNDLING_VIOLATION;
428 return SCTP_ERROR_NONE;
432 sctp_handle_init_ack (sctp_header_t * sctp_hdr,
433 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
434 sctp_connection_t * sctp_conn, u8 idx,
435 vlib_buffer_t * b0, u16 sctp_implied_length)
437 sctp_init_ack_chunk_t *init_ack_chunk =
438 (sctp_init_ack_chunk_t *) (sctp_hdr);
439 sctp_state_cookie_param_t state_cookie;
441 char hostname[FQDN_MAX_LENGTH];
443 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
444 if (sctp_conn->local_tag != init_ack_chunk->sctp_hdr.verification_tag)
446 return SCTP_ERROR_INVALID_TAG;
450 * It is not possible to bundle any other CHUNK with the INIT chunk
452 if (sctp_is_bundling (sctp_implied_length, &init_ack_chunk->chunk_hdr))
453 return SCTP_ERROR_BUNDLING_VIOLATION;
455 sctp_calculate_rto (sctp_conn, idx);
457 /* remote_tag to be placed in the VERIFICATION_TAG field of the COOKIE_ECHO chunk */
458 sctp_conn->remote_tag = init_ack_chunk->initiate_tag;
459 sctp_conn->remote_initial_tsn =
460 clib_net_to_host_u32 (init_ack_chunk->initial_tsn);
461 sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn;
462 sctp_conn->next_tsn_expected = sctp_conn->remote_initial_tsn + 1;
463 SCTP_CONN_TRACKING_DBG ("sctp_conn->remote_initial_tsn = %u",
464 sctp_conn->remote_initial_tsn);
465 sctp_conn->snd_opts.a_rwnd = clib_net_to_host_u32 (init_ack_chunk->a_rwnd);
467 u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr);
469 if (length > sizeof (sctp_init_ack_chunk_t))
471 * There are optional parameters in the INIT ACK chunk
474 u16 pointer_offset = sizeof (sctp_init_ack_chunk_t);
476 while (pointer_offset < length)
478 sctp_opt_params_hdr_t *opt_params_hdr =
479 (sctp_opt_params_hdr_t *) ((char *) init_ack_chunk +
482 switch (clib_net_to_host_u16 (opt_params_hdr->type))
484 case SCTP_IPV4_ADDRESS_TYPE:
486 sctp_ipv4_addr_param_t *ipv4 =
487 (sctp_ipv4_addr_param_t *) opt_params_hdr;
489 sctp_sub_connection_add_ip4 (vlib_get_thread_index (), ipv4);
493 case SCTP_IPV6_ADDRESS_TYPE:
495 sctp_ipv6_addr_param_t *ipv6 =
496 (sctp_ipv6_addr_param_t *) opt_params_hdr;
498 sctp_sub_connection_add_ip6 (vlib_get_thread_index (), ipv6);
502 case SCTP_STATE_COOKIE_TYPE:
504 sctp_state_cookie_param_t *state_cookie_param =
505 (sctp_state_cookie_param_t *) opt_params_hdr;
507 clib_memcpy (&state_cookie, state_cookie_param,
508 sizeof (sctp_state_cookie_param_t));
511 case SCTP_HOSTNAME_ADDRESS_TYPE:
513 sctp_hostname_param_t *hostname_addr =
514 (sctp_hostname_param_t *) opt_params_hdr;
515 clib_memcpy (hostname, hostname_addr->hostname,
519 case SCTP_UNRECOGNIZED_TYPE:
524 u16 increment = clib_net_to_host_u16 (opt_params_hdr->length);
525 /* This indicates something really bad happened */
528 return SCTP_ERROR_INVALID_TAG;
530 pointer_offset += increment;
534 sctp_prepare_cookie_echo_chunk (sctp_conn, idx, b0, &state_cookie);
536 /* Start the T1_COOKIE timer */
537 sctp_timer_set (sctp_conn, idx,
538 SCTP_TIMER_T1_COOKIE, sctp_conn->sub_conn[idx].RTO);
540 return SCTP_ERROR_NONE;
543 /** Enqueue data out-of-order for delivery to application */
545 sctp_session_enqueue_data_ooo (sctp_connection_t * sctp_conn,
546 vlib_buffer_t * b, u16 data_len, u8 conn_idx)
548 int written, error = SCTP_ERROR_ENQUEUED;
551 session_enqueue_stream_connection (&sctp_conn->
552 sub_conn[conn_idx].connection, b, 0,
553 1 /* queue event */ ,
556 /* Update next_tsn_expected */
557 if (PREDICT_TRUE (written == data_len))
559 sctp_conn->next_tsn_expected += written;
561 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
562 sctp_conn->sub_conn[conn_idx].connection.c_index,
565 /* If more data written than expected, account for out-of-order bytes. */
566 else if (written > data_len)
568 sctp_conn->next_tsn_expected += written;
570 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
571 sctp_conn->sub_conn[conn_idx].connection.c_index,
574 else if (written > 0)
576 /* We've written something but FIFO is probably full now */
577 sctp_conn->next_tsn_expected += written;
579 error = SCTP_ERROR_PARTIALLY_ENQUEUED;
582 ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
583 sctp_conn->sub_conn[conn_idx].connection.c_index, written);
587 SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
588 sctp_conn->sub_conn[conn_idx].connection.c_index);
590 return SCTP_ERROR_FIFO_FULL;
593 /* TODO: Update out_of_order_map & SACK list */
598 /** Enqueue data for delivery to application */
600 sctp_session_enqueue_data (sctp_connection_t * sctp_conn, vlib_buffer_t * b,
601 u16 data_len, u8 conn_idx)
603 int written, error = SCTP_ERROR_ENQUEUED;
606 session_enqueue_stream_connection (&sctp_conn->
607 sub_conn[conn_idx].connection, b, 0,
608 1 /* queue event */ ,
611 /* Update next_tsn_expected */
612 if (PREDICT_TRUE (written == data_len))
614 sctp_conn->next_tsn_expected += written;
616 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
617 sctp_conn->sub_conn[conn_idx].connection.c_index,
620 /* If more data written than expected, account for out-of-order bytes. */
621 else if (written > data_len)
623 sctp_conn->next_tsn_expected += written;
625 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
626 sctp_conn->sub_conn[conn_idx].connection.c_index,
629 else if (written > 0)
631 /* We've written something but FIFO is probably full now */
632 sctp_conn->next_tsn_expected += written;
634 error = SCTP_ERROR_PARTIALLY_ENQUEUED;
637 ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
638 sctp_conn->sub_conn[conn_idx].connection.c_index, written);
642 SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
643 sctp_conn->sub_conn[conn_idx].connection.c_index);
645 return SCTP_ERROR_FIFO_FULL;
652 sctp_is_sack_delayable (sctp_connection_t * sctp_conn, u8 idx, u8 is_gapping)
656 SCTP_CONN_TRACKING_DBG
657 ("gapping != 0: CONN_INDEX = %u, sctp_conn->ack_state = %u",
658 sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
662 if (sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS)
664 SCTP_CONN_TRACKING_DBG
665 ("sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS: CONN_INDEX = %u, sctp_conn->ack_state = %u",
666 sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
670 sctp_conn->ack_state += 1;
676 sctp_is_connection_gapping (sctp_connection_t * sctp_conn, u32 tsn,
679 if (sctp_conn->next_tsn_expected != tsn) // It means data transmission is GAPPING
681 SCTP_CONN_TRACKING_DBG
682 ("GAPPING: CONN_INDEX = %u, sctp_conn->next_tsn_expected = %u, tsn = %u, diff = %u",
683 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.c_index,
684 sctp_conn->next_tsn_expected, tsn,
685 sctp_conn->next_tsn_expected - tsn);
692 sctp_handle_data (sctp_payload_data_chunk_t * sctp_data_chunk,
693 sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b,
696 u32 error = 0, n_data_bytes;
699 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
700 if (sctp_conn->local_tag != sctp_data_chunk->sctp_hdr.verification_tag)
702 return SCTP_ERROR_INVALID_TAG;
705 vnet_buffer (b)->sctp.sid = sctp_data_chunk->stream_id;
706 vnet_buffer (b)->sctp.ssn = sctp_data_chunk->stream_seq;
708 u32 tsn = clib_net_to_host_u32 (sctp_data_chunk->tsn);
710 vlib_buffer_advance (b, vnet_buffer (b)->sctp.data_offset);
711 n_data_bytes = vnet_buffer (b)->sctp.data_len;
712 ASSERT (n_data_bytes);
714 sctp_is_connection_gapping (sctp_conn, tsn, &is_gapping);
716 sctp_conn->last_rcvd_tsn = tsn;
718 SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
720 u8 bbit = vnet_sctp_get_bbit (&sctp_data_chunk->chunk_hdr);
721 u8 ebit = vnet_sctp_get_ebit (&sctp_data_chunk->chunk_hdr);
723 if (bbit == 1 && ebit == 1) /* Unfragmented message */
725 /* In order data, enqueue. Fifo figures out by itself if any out-of-order
726 * segments can be enqueued after fifo tail offset changes. */
727 if (PREDICT_FALSE (is_gapping == 1))
729 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
731 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
733 else if (bbit == 1 && ebit == 0) /* First piece of a fragmented user message */
735 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
737 else if (bbit == 0 && ebit == 1) /* Last piece of a fragmented user message */
739 if (PREDICT_FALSE (is_gapping == 1))
741 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
743 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
745 else /* Middle piece of a fragmented user message */
747 if (PREDICT_FALSE (is_gapping == 1))
749 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
751 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
753 sctp_conn->last_rcvd_tsn = tsn;
755 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
757 SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
759 if (!sctp_is_sack_delayable (sctp_conn, idx, is_gapping))
760 sctp_prepare_sack_chunk (sctp_conn, idx, b);
762 sctp_conn->sub_conn[idx].enqueue_state = error;
768 sctp_handle_cookie_echo (sctp_header_t * sctp_hdr,
769 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
770 sctp_connection_t * sctp_conn, u8 idx,
771 vlib_buffer_t * b0, u16 * next0)
773 u32 now = sctp_time_now ();
775 sctp_cookie_echo_chunk_t *cookie_echo =
776 (sctp_cookie_echo_chunk_t *) sctp_hdr;
778 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
779 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
781 return SCTP_ERROR_INVALID_TAG;
784 sctp_calculate_rto (sctp_conn, idx);
787 clib_net_to_host_u32 (cookie_echo->cookie.creation_time);
788 u32 cookie_lifespan =
789 clib_net_to_host_u32 (cookie_echo->cookie.cookie_lifespan);
790 if (now > creation_time + cookie_lifespan)
792 SCTP_DBG ("now (%u) > creation_time (%u) + cookie_lifespan (%u)",
793 now, creation_time, cookie_lifespan);
794 return SCTP_ERROR_COOKIE_ECHO_VIOLATION;
797 sctp_prepare_cookie_ack_chunk (sctp_conn, idx, b0);
800 sctp_conn->state = SCTP_STATE_ESTABLISHED;
801 sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_STATE_UP;
802 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
804 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
805 sctp_conn->sub_conn[idx].RTO);
807 stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
809 return SCTP_ERROR_NONE;
814 sctp_handle_cookie_ack (sctp_header_t * sctp_hdr,
815 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
816 sctp_connection_t * sctp_conn, u8 idx,
817 vlib_buffer_t * b0, u16 * next0)
819 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
820 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
822 return SCTP_ERROR_INVALID_TAG;
825 sctp_calculate_rto (sctp_conn, idx);
827 sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T1_COOKIE);
829 sctp_conn->state = SCTP_STATE_ESTABLISHED;
830 sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_STATE_UP;
832 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
834 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
835 sctp_conn->sub_conn[idx].RTO);
837 stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
839 return SCTP_ERROR_NONE;
844 sctp46_rcv_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
845 vlib_frame_t * from_frame, int is_ip4)
847 sctp_main_t *tm = vnet_get_sctp_main ();
849 u32 n_left_from, next_index, *from, *to_next;
850 u32 my_thread_index = vm->thread_index;
852 from = vlib_frame_vector_args (from_frame);
853 n_left_from = from_frame->n_vectors;
855 next_index = node->cached_next_index;
857 while (n_left_from > 0)
861 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
863 while (n_left_from > 0 && n_left_to_next > 0)
867 sctp_header_t *sctp_hdr = 0;
868 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
869 ip4_header_t *ip4_hdr = 0;
870 ip6_header_t *ip6_hdr = 0;
871 sctp_connection_t *sctp_conn, *new_sctp_conn;
872 u16 sctp_implied_length = 0;
873 u16 error0 = SCTP_ERROR_NONE, next0 = sctp_next_drop (is_ip4);
883 b0 = vlib_get_buffer (vm, bi0);
885 /* If we are in SCTP_COOKIE_WAIT_STATE then the connection
886 * will come from the half-open connections pool.
889 sctp_half_open_connection_get (vnet_buffer (b0)->
890 sctp.connection_index);
892 if (PREDICT_FALSE (sctp_conn == 0))
895 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
896 error0 = SCTP_ERROR_INVALID_CONNECTION;
901 ip4_hdr = vlib_buffer_get_current (b0);
902 sctp_hdr = ip4_next_header (ip4_hdr);
903 idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
907 ip6_hdr = vlib_buffer_get_current (b0);
908 sctp_hdr = ip6_next_header (ip6_hdr);
909 idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
912 sctp_conn->sub_conn[idx].subconn_idx = idx;
913 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
916 (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
918 sctp_implied_length =
919 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
921 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
927 sctp_is_valid_init_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
928 b0, sctp_implied_length);
930 if (error0 == SCTP_ERROR_NONE)
932 pool_get (tm->connections[my_thread_index], new_sctp_conn);
933 clib_memcpy (new_sctp_conn, sctp_conn,
934 sizeof (*new_sctp_conn));
935 new_sctp_conn->sub_conn[idx].c_c_index =
936 new_sctp_conn - tm->connections[my_thread_index];
937 new_sctp_conn->sub_conn[idx].c_thread_index =
939 new_sctp_conn->sub_conn[idx].PMTU =
940 sctp_conn->sub_conn[idx].PMTU;
941 new_sctp_conn->sub_conn[idx].subconn_idx = idx;
943 if (sctp_half_open_connection_cleanup (sctp_conn))
946 ("Cannot cleanup half-open connection; not the owning thread");
949 sctp_connection_timers_init (new_sctp_conn);
952 sctp_handle_init_ack (sctp_hdr, sctp_chunk_hdr,
953 new_sctp_conn, idx, b0,
954 sctp_implied_length);
956 sctp_init_cwnd (new_sctp_conn);
958 if (session_stream_connect_notify
959 (&new_sctp_conn->sub_conn[idx].connection, 0))
962 ("conn_index = %u: session_stream_connect_notify error; cleaning up connection",
963 new_sctp_conn->sub_conn[idx].connection.c_index);
964 sctp_connection_cleanup (new_sctp_conn);
967 next0 = sctp_next_output (is_ip4);
971 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
972 * are handled by the input-dispatcher function using the table-lookup
973 * hence we should never get to the "default" case below.
976 error0 = SCTP_ERROR_UNKOWN_CHUNK;
977 next0 = sctp_next_drop (is_ip4);
981 if (error0 != SCTP_ERROR_NONE)
983 clib_warning ("error while parsing chunk");
984 sctp_connection_cleanup (sctp_conn);
985 next0 = sctp_next_drop (is_ip4);
990 b0->error = node->errors[error0];
991 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
993 sctp_rx_trace_t *t0 =
994 vlib_add_trace (vm, node, b0, sizeof (*t0));
995 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
998 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
999 n_left_to_next, bi0, next0);
1002 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1004 return from_frame->n_vectors;
1008 sctp4_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1009 vlib_frame_t * from_frame)
1011 return sctp46_rcv_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1015 sctp6_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1016 vlib_frame_t * from_frame)
1018 return sctp46_rcv_phase_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1022 format_sctp_rx_trace_short (u8 * s, va_list * args)
1024 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1025 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1026 sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
1028 s = format (s, "%d -> %d (%U)",
1029 clib_net_to_host_u16 (t->sctp_header.src_port),
1030 clib_net_to_host_u16 (t->sctp_header.dst_port),
1031 format_sctp_state, t->sctp_connection.state);
1037 VLIB_REGISTER_NODE (sctp4_rcv_phase_node) =
1039 .function = sctp4_rcv_phase,
1040 .name = "sctp4-rcv",
1041 /* Takes a vector of packets. */
1042 .vector_size = sizeof (u32),
1043 .n_errors = SCTP_N_ERROR,
1044 .error_strings = sctp_error_strings,
1045 .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1048 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1049 foreach_sctp_state_next
1052 .format_trace = format_sctp_rx_trace_short,
1056 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_rcv_phase_node, sctp4_rcv_phase);
1059 VLIB_REGISTER_NODE (sctp6_init_phase_node) =
1061 .function = sctp6_rcv_phase,
1062 .name = "sctp6-rcv",
1063 /* Takes a vector of packets. */
1064 .vector_size = sizeof (u32),
1065 .n_errors = SCTP_N_ERROR,
1066 .error_strings = sctp_error_strings,
1067 .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1070 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1071 foreach_sctp_state_next
1074 .format_trace = format_sctp_rx_trace_short,
1078 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_init_phase_node, sctp6_rcv_phase);
1080 vlib_node_registration_t sctp4_shutdown_phase_node;
1081 vlib_node_registration_t sctp6_shutdown_phase_node;
1084 sctp_handle_shutdown (sctp_header_t * sctp_hdr,
1085 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1086 sctp_connection_t * sctp_conn, u8 idx,
1087 vlib_buffer_t * b0, u16 sctp_implied_length,
1090 sctp_shutdown_association_chunk_t *shutdown_chunk =
1091 (sctp_shutdown_association_chunk_t *) (sctp_hdr);
1093 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1094 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1096 return SCTP_ERROR_INVALID_TAG;
1100 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1102 if (sctp_is_bundling (sctp_implied_length, &shutdown_chunk->chunk_hdr))
1103 return SCTP_ERROR_BUNDLING_VIOLATION;
1105 switch (sctp_conn->state)
1107 case SCTP_STATE_ESTABLISHED:
1108 if (sctp_check_outstanding_data_chunks (sctp_conn) == 0)
1109 sctp_conn->state = SCTP_STATE_SHUTDOWN_RECEIVED;
1110 sctp_send_shutdown_ack (sctp_conn, idx, b0);
1113 case SCTP_STATE_SHUTDOWN_SENT:
1114 sctp_send_shutdown_ack (sctp_conn, idx, b0);
1118 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
1120 return SCTP_ERROR_NONE;
1124 sctp_handle_shutdown_ack (sctp_header_t * sctp_hdr,
1125 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1126 sctp_connection_t * sctp_conn, u8 idx,
1127 vlib_buffer_t * b0, u16 sctp_implied_length,
1130 sctp_shutdown_ack_chunk_t *shutdown_ack_chunk =
1131 (sctp_shutdown_ack_chunk_t *) (sctp_hdr);
1133 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1134 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1136 return SCTP_ERROR_INVALID_TAG;
1140 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1142 if (sctp_is_bundling (sctp_implied_length, &shutdown_ack_chunk->chunk_hdr))
1143 return SCTP_ERROR_BUNDLING_VIOLATION;
1145 /* Whether we are in SCTP_STATE_SHUTDOWN_SENT or SCTP_STATE_SHUTDOWN_ACK_SENT
1146 * the reception of a SHUTDOWN_ACK chunk leads to the same actions:
1147 * - STOP T2_SHUTDOWN timer
1148 * - SEND SHUTDOWN_COMPLETE chunk
1150 sctp_timer_reset (sctp_conn, MAIN_SCTP_SUB_CONN_IDX,
1151 SCTP_TIMER_T2_SHUTDOWN);
1153 sctp_send_shutdown_complete (sctp_conn, idx, b0);
1155 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
1157 return SCTP_ERROR_NONE;
1161 sctp_handle_shutdown_complete (sctp_header_t * sctp_hdr,
1162 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1163 sctp_connection_t * sctp_conn, u8 idx,
1164 vlib_buffer_t * b0, u16 sctp_implied_length,
1167 sctp_shutdown_complete_chunk_t *shutdown_complete =
1168 (sctp_shutdown_complete_chunk_t *) (sctp_hdr);
1170 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1171 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1173 return SCTP_ERROR_INVALID_TAG;
1177 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1179 if (sctp_is_bundling (sctp_implied_length, &shutdown_complete->chunk_hdr))
1180 return SCTP_ERROR_BUNDLING_VIOLATION;
1182 sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T2_SHUTDOWN);
1184 stream_session_disconnect_notify (&sctp_conn->sub_conn[idx].connection);
1186 sctp_conn->state = SCTP_STATE_CLOSED;
1188 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1190 return SCTP_ERROR_NONE;
1194 sctp46_shutdown_phase_inline (vlib_main_t * vm,
1195 vlib_node_runtime_t * node,
1196 vlib_frame_t * from_frame, int is_ip4)
1198 u32 n_left_from, next_index, *from, *to_next;
1199 u32 my_thread_index = vm->thread_index;
1201 from = vlib_frame_vector_args (from_frame);
1202 n_left_from = from_frame->n_vectors;
1204 next_index = node->cached_next_index;
1206 while (n_left_from > 0)
1210 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1212 while (n_left_from > 0 && n_left_to_next > 0)
1216 sctp_rx_trace_t *sctp_trace;
1217 sctp_header_t *sctp_hdr = 0;
1218 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1219 ip4_header_t *ip4_hdr = 0;
1220 ip6_header_t *ip6_hdr = 0;
1221 sctp_connection_t *sctp_conn;
1222 u16 sctp_implied_length = 0;
1223 u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_RCV_PHASE_N_NEXT;
1231 n_left_to_next -= 1;
1233 b0 = vlib_get_buffer (vm, bi0);
1235 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1238 if (PREDICT_FALSE (sctp_conn == 0))
1241 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1242 error0 = SCTP_ERROR_INVALID_CONNECTION;
1248 ip4_hdr = vlib_buffer_get_current (b0);
1249 sctp_hdr = ip4_next_header (ip4_hdr);
1250 idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
1254 ip6_hdr = vlib_buffer_get_current (b0);
1255 sctp_hdr = ip6_next_header (ip6_hdr);
1256 idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
1259 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1260 sctp_chunk_hdr = &full_hdr->common_hdr;
1262 sctp_implied_length =
1263 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1265 u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
1270 sctp_handle_shutdown (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1271 idx, b0, sctp_implied_length, &next0);
1276 sctp_handle_shutdown_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1277 idx, b0, sctp_implied_length,
1281 case SHUTDOWN_COMPLETE:
1283 sctp_handle_shutdown_complete (sctp_hdr, sctp_chunk_hdr,
1285 sctp_implied_length, &next0);
1287 sctp_connection_cleanup (sctp_conn);
1291 * DATA chunks can still be transmitted/received in the SHUTDOWN-PENDING
1292 * and SHUTDOWN-SENT states (as per RFC4960 Section 6)
1296 sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
1297 sctp_conn, idx, b0, &next0);
1300 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1301 * are handled by the input-dispatcher function using the table-lookup
1302 * hence we should never get to the "default" case below.
1305 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1306 next0 = sctp_next_drop (is_ip4);
1310 if (error0 != SCTP_ERROR_NONE)
1312 clib_warning ("error while parsing chunk");
1313 sctp_connection_cleanup (sctp_conn);
1314 next0 = sctp_next_drop (is_ip4);
1319 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1322 vlib_add_trace (vm, node, b0, sizeof (*sctp_trace));
1324 if (sctp_hdr != NULL)
1325 clib_memcpy (&sctp_trace->sctp_header, sctp_hdr,
1326 sizeof (sctp_trace->sctp_header));
1328 if (sctp_conn != NULL)
1329 clib_memcpy (&sctp_trace->sctp_connection, sctp_conn,
1330 sizeof (sctp_trace->sctp_connection));
1333 b0->error = node->errors[error0];
1335 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1336 n_left_to_next, bi0, next0);
1339 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1342 return from_frame->n_vectors;
1347 sctp4_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1348 vlib_frame_t * from_frame)
1350 return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1354 sctp6_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1355 vlib_frame_t * from_frame)
1357 return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1361 VLIB_REGISTER_NODE (sctp4_shutdown_phase_node) =
1363 .function = sctp4_shutdown_phase,
1364 .name = "sctp4-shutdown",
1365 /* Takes a vector of packets. */
1366 .vector_size = sizeof (u32),
1367 .n_errors = SCTP_N_ERROR,
1368 .error_strings = sctp_error_strings,
1369 .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1372 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1373 foreach_sctp_state_next
1376 .format_trace = format_sctp_rx_trace_short,
1380 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_shutdown_phase_node,
1381 sctp4_shutdown_phase);
1384 VLIB_REGISTER_NODE (sctp6_shutdown_phase_node) =
1386 .function = sctp6_shutdown_phase,
1387 .name = "sctp6-shutdown",
1388 /* Takes a vector of packets. */
1389 .vector_size = sizeof (u32),
1390 .n_errors = SCTP_N_ERROR,
1391 .error_strings = sctp_error_strings,
1392 .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1395 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1396 foreach_sctp_state_next
1399 .format_trace = format_sctp_rx_trace_short,
1403 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_shutdown_phase_node,
1404 sctp6_shutdown_phase);
1406 vlib_node_registration_t sctp4_listen_phase_node;
1407 vlib_node_registration_t sctp6_listen_phase_node;
1409 vlib_node_registration_t sctp4_established_phase_node;
1410 vlib_node_registration_t sctp6_established_phase_node;
1413 sctp_handle_sack (sctp_selective_ack_chunk_t * sack_chunk,
1414 sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b0,
1417 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1418 if (sctp_conn->local_tag != sack_chunk->sctp_hdr.verification_tag)
1420 return SCTP_ERROR_INVALID_TAG;
1423 sctp_conn->sub_conn[idx].last_seen = sctp_time_now ();
1425 /* Section 7.2.2; point (2) */
1426 if (sctp_conn->sub_conn[idx].cwnd > sctp_conn->sub_conn[idx].ssthresh)
1427 sctp_conn->sub_conn[idx].partially_acked_bytes =
1428 sctp_conn->next_tsn - sack_chunk->cumulative_tsn_ack;
1430 /* Section 7.2.2; point (5) */
1431 if (sctp_conn->next_tsn - sack_chunk->cumulative_tsn_ack == 0)
1432 sctp_conn->sub_conn[idx].partially_acked_bytes = 0;
1434 sctp_conn->last_unacked_tsn = sack_chunk->cumulative_tsn_ack;
1436 sctp_calculate_rto (sctp_conn, idx);
1438 sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T3_RXTX,
1439 sctp_conn->sub_conn[idx].RTO);
1441 sctp_conn->sub_conn[idx].RTO_pending = 0;
1443 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1445 return SCTP_ERROR_NONE;
1449 sctp_handle_heartbeat (sctp_hb_req_chunk_t * sctp_hb_chunk,
1450 sctp_connection_t * sctp_conn, u8 idx,
1451 vlib_buffer_t * b0, u16 * next0)
1453 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1454 if (sctp_conn->local_tag != sctp_hb_chunk->sctp_hdr.verification_tag)
1456 return SCTP_ERROR_INVALID_TAG;
1459 sctp_prepare_heartbeat_ack_chunk (sctp_conn, idx, b0);
1461 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].connection.is_ip4);
1463 return SCTP_ERROR_NONE;
1467 sctp_handle_heartbeat_ack (sctp_hb_ack_chunk_t * sctp_hb_ack_chunk,
1468 sctp_connection_t * sctp_conn, u8 idx,
1469 vlib_buffer_t * b0, u16 * next0)
1471 sctp_conn->sub_conn[idx].last_seen = sctp_time_now ();
1473 sctp_conn->sub_conn[idx].unacknowledged_hb -= 1;
1475 sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
1476 sctp_conn->sub_conn[idx].RTO);
1478 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1480 return SCTP_ERROR_NONE;
1484 sctp_node_inc_counter (vlib_main_t * vm, u32 tcp4_node, u32 tcp6_node,
1485 u8 is_ip4, u8 evt, u8 val)
1487 if (PREDICT_TRUE (!val))
1491 vlib_node_increment_counter (vm, tcp4_node, evt, val);
1493 vlib_node_increment_counter (vm, tcp6_node, evt, val);
1497 sctp46_listen_process_inline (vlib_main_t * vm,
1498 vlib_node_runtime_t * node,
1499 vlib_frame_t * from_frame, int is_ip4)
1501 u32 n_left_from, next_index, *from, *to_next;
1502 u32 my_thread_index = vm->thread_index;
1504 from = vlib_frame_vector_args (from_frame);
1505 n_left_from = from_frame->n_vectors;
1507 next_index = node->cached_next_index;
1509 while (n_left_from > 0)
1513 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1515 while (n_left_from > 0 && n_left_to_next > 0)
1519 sctp_header_t *sctp_hdr = 0;
1520 ip4_header_t *ip4_hdr;
1521 ip6_header_t *ip6_hdr;
1522 sctp_connection_t *child_conn;
1523 sctp_connection_t *sctp_listener;
1524 u16 next0 = sctp_next_drop (is_ip4), error0 = SCTP_ERROR_ENQUEUED;
1531 n_left_to_next -= 1;
1533 b0 = vlib_get_buffer (vm, bi0);
1535 sctp_listener_get (vnet_buffer (b0)->sctp.connection_index);
1539 ip4_hdr = vlib_buffer_get_current (b0);
1540 sctp_hdr = ip4_next_header (ip4_hdr);
1544 ip6_hdr = vlib_buffer_get_current (b0);
1545 sctp_hdr = ip6_next_header (ip6_hdr);
1549 sctp_lookup_connection (sctp_listener->sub_conn
1550 [MAIN_SCTP_SUB_CONN_IDX].c_fib_index, b0,
1551 my_thread_index, is_ip4);
1553 if (PREDICT_FALSE (child_conn->state != SCTP_STATE_CLOSED))
1556 ("conn_index = %u: child_conn->state != SCTP_STATE_CLOSED.... STATE=%s",
1557 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
1559 sctp_state_to_string (child_conn->state));
1560 error0 = SCTP_ERROR_CREATE_EXISTS;
1564 /* Create child session and send SYN-ACK */
1565 child_conn = sctp_connection_new (my_thread_index);
1566 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].subconn_idx =
1567 MAIN_SCTP_SUB_CONN_IDX;
1568 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_port =
1570 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_port =
1572 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_is_ip4 = is_ip4;
1573 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.proto =
1574 sctp_listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection.proto;
1575 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].PMTU =
1576 sctp_listener->sub_conn[MAIN_SCTP_SUB_CONN_IDX].PMTU;
1577 child_conn->state = SCTP_STATE_CLOSED;
1581 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_ip4.as_u32 =
1582 ip4_hdr->dst_address.as_u32;
1583 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_ip4.as_u32 =
1584 ip4_hdr->src_address.as_u32;
1588 clib_memcpy (&child_conn->
1589 sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_lcl_ip6,
1590 &ip6_hdr->dst_address, sizeof (ip6_address_t));
1591 clib_memcpy (&child_conn->
1592 sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_rmt_ip6,
1593 &ip6_hdr->src_address, sizeof (ip6_address_t));
1596 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1597 sctp_chunks_common_hdr_t *sctp_chunk_hdr = &full_hdr->common_hdr;
1599 u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
1600 if (chunk_type != INIT)
1603 ("conn_index = %u: chunk_type != INIT... chunk_type=%s",
1604 child_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
1605 connection.c_index, sctp_chunk_to_string (chunk_type));
1607 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1608 next0 = sctp_next_drop (is_ip4);
1612 u16 sctp_implied_length =
1613 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1618 sctp_connection_timers_init (child_conn);
1620 sctp_init_snd_vars (child_conn);
1623 sctp_handle_init (sctp_hdr, sctp_chunk_hdr, child_conn, b0,
1624 sctp_implied_length);
1626 sctp_init_cwnd (child_conn);
1628 if (error0 == SCTP_ERROR_NONE)
1630 if (stream_session_accept
1632 sub_conn[MAIN_SCTP_SUB_CONN_IDX].connection,
1634 sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_s_index, 0))
1636 clib_warning ("session accept fail");
1637 sctp_connection_cleanup (child_conn);
1638 error0 = SCTP_ERROR_CREATE_SESSION_FAIL;
1641 next0 = sctp_next_output (is_ip4);
1645 /* Reception of a DATA chunk whilst in the CLOSED state is called
1646 * "Out of the Blue" packet and handling of the chunk needs special treatment
1647 * as per RFC4960 section 8.4
1654 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1656 sctp_rx_trace_t *t0 =
1657 vlib_add_trace (vm, node, b0, sizeof (*t0));
1658 clib_memcpy (&t0->sctp_header, sctp_hdr,
1659 sizeof (t0->sctp_header));
1660 clib_memcpy (&t0->sctp_connection, sctp_listener,
1661 sizeof (t0->sctp_connection));
1664 b0->error = node->errors[error0];
1666 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1667 n_left_to_next, bi0, next0);
1669 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1672 return from_frame->n_vectors;
1676 sctp4_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1677 vlib_frame_t * from_frame)
1679 return sctp46_listen_process_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1683 sctp6_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1684 vlib_frame_t * from_frame)
1686 return sctp46_listen_process_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1690 sctp46_established_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1691 vlib_frame_t * from_frame, int is_ip4)
1693 u32 n_left_from, next_index, *from, *to_next;
1694 u32 my_thread_index = vm->thread_index, errors = 0;
1696 from = vlib_frame_vector_args (from_frame);
1697 n_left_from = from_frame->n_vectors;
1699 next_index = node->cached_next_index;
1701 while (n_left_from > 0)
1705 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1707 while (n_left_from > 0 && n_left_to_next > 0)
1711 sctp_header_t *sctp_hdr = 0;
1712 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1713 ip4_header_t *ip4_hdr = 0;
1714 ip6_header_t *ip6_hdr = 0;
1715 sctp_connection_t *sctp_conn;
1716 u16 error0 = SCTP_ERROR_ENQUEUED, next0 =
1717 SCTP_ESTABLISHED_PHASE_N_NEXT;
1725 n_left_to_next -= 1;
1727 b0 = vlib_get_buffer (vm, bi0);
1729 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1732 if (PREDICT_FALSE (sctp_conn == 0))
1735 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1736 error0 = SCTP_ERROR_INVALID_CONNECTION;
1741 ip4_hdr = vlib_buffer_get_current (b0);
1742 sctp_hdr = ip4_next_header (ip4_hdr);
1743 idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
1747 ip6_hdr = vlib_buffer_get_current (b0);
1748 sctp_hdr = ip6_next_header (ip6_hdr);
1749 idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
1752 sctp_conn->sub_conn[idx].subconn_idx = idx;
1754 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1756 (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
1758 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
1764 sctp_handle_cookie_echo (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1770 sctp_handle_cookie_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1776 sctp_handle_sack ((sctp_selective_ack_chunk_t *) sctp_hdr,
1777 sctp_conn, idx, b0, &next0);
1782 sctp_handle_heartbeat ((sctp_hb_req_chunk_t *) sctp_hdr,
1783 sctp_conn, idx, b0, &next0);
1788 sctp_handle_heartbeat_ack ((sctp_hb_ack_chunk_t *) sctp_hdr,
1789 sctp_conn, idx, b0, &next0);
1794 sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
1795 sctp_conn, idx, b0, &next0);
1798 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1799 * are handled by the input-dispatcher function using the table-lookup
1800 * hence we should never get to the "default" case below.
1803 error0 = SCTP_ERROR_UNKOWN_CHUNK;
1804 next0 = sctp_next_drop (is_ip4);
1809 b0->error = node->errors[error0];
1810 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1812 sctp_rx_trace_t *t0 =
1813 vlib_add_trace (vm, node, b0, sizeof (*t0));
1814 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
1817 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1818 n_left_to_next, bi0, next0);
1821 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1824 errors = session_manager_flush_enqueue_events (TRANSPORT_PROTO_SCTP,
1827 sctp_node_inc_counter (vm, is_ip4, sctp4_established_phase_node.index,
1828 sctp6_established_phase_node.index,
1829 SCTP_ERROR_EVENT_FIFO_FULL, errors);
1830 sctp_flush_frame_to_output (vm, my_thread_index, is_ip4);
1832 return from_frame->n_vectors;
1836 sctp4_established_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1837 vlib_frame_t * from_frame)
1839 return sctp46_established_phase_inline (vm, node, from_frame,
1844 sctp6_established_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1845 vlib_frame_t * from_frame)
1847 return sctp46_established_phase_inline (vm, node, from_frame,
1852 format_sctp_rx_trace (u8 * s, va_list * args)
1854 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1855 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1856 sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
1857 u32 indent = format_get_indent (s);
1859 s = format (s, "%U\n%U%U",
1860 format_sctp_header, &t->sctp_header, 128,
1861 format_white_space, indent,
1862 format_sctp_connection, &t->sctp_connection, 1);
1868 VLIB_REGISTER_NODE (sctp4_listen_phase_node) =
1870 .function = sctp4_listen_phase,
1871 .name = "sctp4-listen",
1872 /* Takes a vector of packets. */
1873 .vector_size = sizeof (u32),
1874 .n_errors = SCTP_N_ERROR,
1875 .error_strings = sctp_error_strings,
1876 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
1879 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
1880 foreach_sctp_state_next
1883 .format_trace = format_sctp_rx_trace_short,
1887 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_listen_phase_node, sctp4_listen_phase);
1890 VLIB_REGISTER_NODE (sctp6_listen_phase_node) =
1892 .function = sctp6_listen_phase,
1893 .name = "sctp6-listen",
1894 /* Takes a vector of packets. */
1895 .vector_size = sizeof (u32),
1896 .n_errors = SCTP_N_ERROR,
1897 .error_strings = sctp_error_strings,
1898 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
1901 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
1902 foreach_sctp_state_next
1905 .format_trace = format_sctp_rx_trace_short,
1909 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_listen_phase_node, sctp6_listen_phase);
1912 VLIB_REGISTER_NODE (sctp4_established_phase_node) =
1914 .function = sctp4_established_phase,
1915 .name = "sctp4-established",
1916 /* Takes a vector of packets. */
1917 .vector_size = sizeof (u32),
1918 .n_errors = SCTP_N_ERROR,
1919 .error_strings = sctp_error_strings,
1920 .n_next_nodes = SCTP_ESTABLISHED_PHASE_N_NEXT,
1923 #define _(s,n) [SCTP_ESTABLISHED_PHASE_NEXT_##s] = n,
1924 foreach_sctp_state_next
1927 .format_trace = format_sctp_rx_trace_short,
1931 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_established_phase_node,
1932 sctp4_established_phase);
1935 VLIB_REGISTER_NODE (sctp6_established_phase_node) =
1937 .function = sctp6_established_phase,
1938 .name = "sctp6-established",
1939 /* Takes a vector of packets. */
1940 .vector_size = sizeof (u32),
1941 .n_errors = SCTP_N_ERROR,
1942 .error_strings = sctp_error_strings,
1943 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
1946 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
1947 foreach_sctp_state_next
1950 .format_trace = format_sctp_rx_trace_short,
1954 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_established_phase_node,
1955 sctp6_established_phase);
1958 * This is the function executed first for the SCTP graph.
1959 * It takes care of doing the initial message parsing and
1960 * dispatch to the specialized function.
1963 sctp46_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
1964 vlib_frame_t * from_frame, int is_ip4)
1966 u32 n_left_from, next_index, *from, *to_next;
1967 u32 my_thread_index = vm->thread_index;
1969 sctp_main_t *tm = vnet_get_sctp_main ();
1971 from = vlib_frame_vector_args (from_frame);
1972 n_left_from = from_frame->n_vectors;
1973 next_index = node->cached_next_index;
1974 sctp_set_time_now (my_thread_index);
1976 while (n_left_from > 0)
1980 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1982 while (n_left_from > 0 && n_left_to_next > 0)
1984 int n_advance_bytes0, n_data_bytes0;
1985 u32 bi0, fib_index0;
1987 sctp_header_t *sctp_hdr = 0;
1988 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1989 sctp_connection_t *sctp_conn;
1990 transport_connection_t *trans_conn;
1991 ip4_header_t *ip4_hdr;
1992 ip6_header_t *ip6_hdr;
1993 u32 error0 = SCTP_ERROR_NO_LISTENER, next0 = SCTP_INPUT_NEXT_DROP;
2000 n_left_to_next -= 1;
2002 b0 = vlib_get_buffer (vm, bi0);
2003 vnet_buffer (b0)->tcp.flags = 0;
2004 fib_index0 = vnet_buffer (b0)->ip.fib_index;
2006 /* Checksum computed by ipx_local no need to compute again */
2010 ip4_hdr = vlib_buffer_get_current (b0);
2011 sctp_hdr = ip4_next_header (ip4_hdr);
2013 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
2014 sctp_chunk_hdr = &full_hdr->common_hdr;
2017 (ip4_header_bytes (ip4_hdr) +
2018 sizeof (sctp_payload_data_chunk_t));
2020 clib_net_to_host_u16 (ip4_hdr->length) - n_advance_bytes0;
2022 trans_conn = session_lookup_connection_wt4 (fib_index0,
2023 &ip4_hdr->dst_address,
2024 &ip4_hdr->src_address,
2027 TRANSPORT_PROTO_SCTP,
2033 ip6_hdr = vlib_buffer_get_current (b0);
2034 sctp_hdr = ip6_next_header (ip6_hdr);
2036 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
2037 sctp_chunk_hdr = &full_hdr->common_hdr;
2039 n_advance_bytes0 = sctp_header_bytes ();
2041 clib_net_to_host_u16 (ip6_hdr->payload_length) -
2043 n_advance_bytes0 += sizeof (ip6_hdr[0]);
2045 trans_conn = session_lookup_connection_wt6 (fib_index0,
2046 &ip6_hdr->dst_address,
2047 &ip6_hdr->src_address,
2050 TRANSPORT_PROTO_SCTP,
2056 if (PREDICT_FALSE (n_advance_bytes0 < 0))
2058 error0 = SCTP_ERROR_LENGTH;
2062 sctp_conn = sctp_get_connection_from_transport (trans_conn);
2063 vnet_sctp_common_hdr_params_net_to_host (sctp_chunk_hdr);
2065 u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
2066 if (chunk_type >= UNKNOWN)
2069 ("Received an unrecognized chunk... something is really bad.");
2070 error0 = SCTP_ERROR_UNKOWN_CHUNK;
2071 next0 = SCTP_INPUT_NEXT_DROP;
2075 vnet_buffer (b0)->sctp.hdr_offset =
2076 (u8 *) sctp_hdr - (u8 *) vlib_buffer_get_current (b0);
2078 /* Session exists */
2079 if (PREDICT_TRUE (0 != sctp_conn))
2081 /* Save connection index */
2082 vnet_buffer (b0)->sctp.connection_index = trans_conn->c_index;
2083 vnet_buffer (b0)->sctp.data_offset = n_advance_bytes0;
2084 vnet_buffer (b0)->sctp.data_len = n_data_bytes0;
2086 next0 = tm->dispatch_table[sctp_conn->state][chunk_type].next;
2087 error0 = tm->dispatch_table[sctp_conn->state][chunk_type].error;
2089 SCTP_DBG_STATE_MACHINE
2090 ("S_INDEX = %u, C_INDEX = %u, TRANS_CONN = %p, SCTP_CONN = %p, CURRENT_CONNECTION_STATE = %s,"
2091 "CHUNK_TYPE_RECEIVED = %s " "NEXT_PHASE = %s",
2092 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
2094 sctp_conn->sub_conn[MAIN_SCTP_SUB_CONN_IDX].
2095 connection.c_index, trans_conn, sctp_conn,
2096 sctp_state_to_string (sctp_conn->state),
2097 sctp_chunk_to_string (chunk_type), phase_to_string (next0));
2099 if (chunk_type == DATA)
2100 SCTP_ADV_DBG ("n_advance_bytes0 = %u, n_data_bytes0 = %u",
2101 n_advance_bytes0, n_data_bytes0);
2108 next0 = SCTP_INPUT_NEXT_DROP;
2109 error0 = SCTP_ERROR_FILTERED;
2111 else if ((is_ip4 && tm->punt_unknown4) ||
2112 (!is_ip4 && tm->punt_unknown6))
2114 next0 = SCTP_INPUT_NEXT_PUNT_PHASE;
2115 error0 = SCTP_ERROR_PUNT;
2119 next0 = SCTP_INPUT_NEXT_DROP;
2120 error0 = SCTP_ERROR_NO_LISTENER;
2122 SCTP_DBG_STATE_MACHINE ("sctp_conn == NULL, NEXT_PHASE = %s",
2123 phase_to_string (next0));
2128 b0->error = error0 ? node->errors[error0] : 0;
2130 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2132 sctp_rx_trace_t *t0 =
2133 vlib_add_trace (vm, node, b0, sizeof (*t0));
2134 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
2136 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2137 n_left_to_next, bi0, next0);
2140 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2142 return from_frame->n_vectors;
2146 sctp4_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2147 vlib_frame_t * from_frame)
2149 return sctp46_input_dispatcher (vm, node, from_frame, 1 /* is_ip4 */ );
2153 sctp6_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2154 vlib_frame_t * from_frame)
2156 return sctp46_input_dispatcher (vm, node, from_frame, 0 /* is_ip4 */ );
2160 VLIB_REGISTER_NODE (sctp4_input_node) =
2162 .function = sctp4_input_dispatcher,
2163 .name = "sctp4-input",
2164 /* Takes a vector of packets. */
2165 .vector_size = sizeof (u32),
2166 .n_errors = SCTP_N_ERROR,
2167 .error_strings = sctp_error_strings,
2168 .n_next_nodes = SCTP_INPUT_N_NEXT,
2171 #define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
2172 foreach_sctp4_input_next
2175 .format_buffer = format_sctp_header,
2176 .format_trace = format_sctp_rx_trace,
2180 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_input_node, sctp4_input_dispatcher);
2183 VLIB_REGISTER_NODE (sctp6_input_node) =
2185 .function = sctp6_input_dispatcher,
2186 .name = "sctp6-input",
2187 /* Takes a vector of packets. */
2188 .vector_size = sizeof (u32),
2189 .n_errors = SCTP_N_ERROR,
2190 .error_strings = sctp_error_strings,
2191 .n_next_nodes = SCTP_INPUT_N_NEXT,
2194 #define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
2195 foreach_sctp6_input_next
2198 .format_buffer = format_sctp_header,
2199 .format_trace = format_sctp_rx_trace,
2203 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_input_node, sctp6_input_dispatcher);
2205 vlib_node_registration_t sctp4_input_node;
2206 vlib_node_registration_t sctp6_input_node;
2209 sctp_dispatch_table_init (sctp_main_t * tm)
2212 for (i = 0; i < ARRAY_LEN (tm->dispatch_table); i++)
2213 for (j = 0; j < ARRAY_LEN (tm->dispatch_table[i]); j++)
2215 tm->dispatch_table[i][j].next = SCTP_INPUT_NEXT_DROP;
2216 tm->dispatch_table[i][j].error = SCTP_ERROR_DISPATCH;
2219 #define _(t,f,n,e) \
2221 tm->dispatch_table[SCTP_STATE_##t][f].next = (n); \
2222 tm->dispatch_table[SCTP_STATE_##t][f].error = (e); \
2226 * SCTP STATE-MACHINE states:
2228 * _(CLOSED, "CLOSED") \
2229 * _(COOKIE_WAIT, "COOKIE_WAIT") \
2230 * _(COOKIE_ECHOED, "COOKIE_ECHOED") \
2231 * _(ESTABLISHED, "ESTABLISHED") \
2232 * _(SHUTDOWN_PENDING, "SHUTDOWN_PENDING") \
2233 * _(SHUTDOWN_SENT, "SHUTDOWN_SENT") \
2234 * _(SHUTDOWN_RECEIVED, "SHUTDOWN_RECEIVED") \
2235 * _(SHUTDOWN_ACK_SENT, "SHUTDOWN_ACK_SENT")
2237 //_(CLOSED, DATA, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */
2238 _(CLOSED, INIT, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2239 _(CLOSED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2240 _(CLOSED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2241 _(CLOSED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2242 _(CLOSED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2243 _(CLOSED, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2244 _(CLOSED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2245 _(CLOSED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2246 _(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2247 _(CLOSED, COOKIE_ECHO, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2248 _(CLOSED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2249 _(CLOSED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2250 _(CLOSED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2251 _(CLOSED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2253 _(COOKIE_WAIT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE);
2254 _(COOKIE_WAIT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2255 _(COOKIE_WAIT, INIT_ACK, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2256 _(COOKIE_WAIT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2257 _(COOKIE_WAIT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2258 _(COOKIE_WAIT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2259 _(COOKIE_WAIT, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2260 _(COOKIE_WAIT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2261 _(COOKIE_WAIT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2262 _(COOKIE_WAIT, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2263 _(COOKIE_WAIT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2264 _(COOKIE_WAIT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2265 _(COOKIE_WAIT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2266 _(COOKIE_WAIT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2267 _(COOKIE_WAIT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2269 _(COOKIE_ECHOED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE);
2270 _(COOKIE_ECHOED, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2271 _(COOKIE_ECHOED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2272 _(COOKIE_ECHOED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2273 _(COOKIE_ECHOED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2274 _(COOKIE_ECHOED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2275 _(COOKIE_ECHOED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2276 _(COOKIE_ECHOED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2277 _(COOKIE_ECHOED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2278 _(COOKIE_ECHOED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2279 _(COOKIE_ECHOED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2280 _(COOKIE_ECHOED, COOKIE_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2282 _(COOKIE_ECHOED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2283 _(COOKIE_ECHOED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2284 _(COOKIE_ECHOED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2286 _(ESTABLISHED, DATA, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2287 _(ESTABLISHED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2288 _(ESTABLISHED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2289 _(ESTABLISHED, SACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2290 _(ESTABLISHED, HEARTBEAT, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2292 _(ESTABLISHED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2294 _(ESTABLISHED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2295 _(ESTABLISHED, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2296 _(ESTABLISHED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2297 _(ESTABLISHED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2298 _(ESTABLISHED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2299 _(ESTABLISHED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2300 _(ESTABLISHED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2301 _(ESTABLISHED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2302 _(ESTABLISHED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2304 _(SHUTDOWN_PENDING, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2305 _(SHUTDOWN_PENDING, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2306 _(SHUTDOWN_PENDING, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2307 _(SHUTDOWN_PENDING, SACK, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2308 _(SHUTDOWN_PENDING, HEARTBEAT, SCTP_INPUT_NEXT_LISTEN_PHASE,
2310 _(SHUTDOWN_PENDING, HEARTBEAT_ACK, SCTP_INPUT_NEXT_LISTEN_PHASE,
2312 _(SHUTDOWN_PENDING, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2313 _(SHUTDOWN_PENDING, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2315 _(SHUTDOWN_PENDING, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2316 _(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2317 _(SHUTDOWN_PENDING, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2318 _(SHUTDOWN_PENDING, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2319 _(SHUTDOWN_PENDING, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2320 _(SHUTDOWN_PENDING, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2321 _(SHUTDOWN_PENDING, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2323 _(SHUTDOWN_SENT, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2324 _(SHUTDOWN_SENT, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2325 _(SHUTDOWN_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2326 _(SHUTDOWN_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2327 _(SHUTDOWN_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2328 _(SHUTDOWN_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2329 _(SHUTDOWN_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2330 _(SHUTDOWN_SENT, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2331 _(SHUTDOWN_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2333 _(SHUTDOWN_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2334 _(SHUTDOWN_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2335 _(SHUTDOWN_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2336 _(SHUTDOWN_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2337 _(SHUTDOWN_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2339 _(SHUTDOWN_RECEIVED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2340 _(SHUTDOWN_RECEIVED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2341 _(SHUTDOWN_RECEIVED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2342 _(SHUTDOWN_RECEIVED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2343 _(SHUTDOWN_RECEIVED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2344 _(SHUTDOWN_RECEIVED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2345 _(SHUTDOWN_RECEIVED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2346 _(SHUTDOWN_RECEIVED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2347 _(SHUTDOWN_RECEIVED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2349 _(SHUTDOWN_RECEIVED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2350 _(SHUTDOWN_RECEIVED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2351 _(SHUTDOWN_RECEIVED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2352 _(SHUTDOWN_RECEIVED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2353 _(SHUTDOWN_RECEIVED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2355 _(SHUTDOWN_ACK_SENT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2356 _(SHUTDOWN_ACK_SENT, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2357 _(SHUTDOWN_ACK_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2358 _(SHUTDOWN_ACK_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2359 _(SHUTDOWN_ACK_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2360 _(SHUTDOWN_ACK_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2361 _(SHUTDOWN_ACK_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2362 _(SHUTDOWN_ACK_SENT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2363 _(SHUTDOWN_ACK_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2364 _(SHUTDOWN_ACK_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2365 _(SHUTDOWN_ACK_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2366 _(SHUTDOWN_ACK_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2367 _(SHUTDOWN_ACK_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2368 _(SHUTDOWN_ACK_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2371 /* TODO: Handle COOKIE ECHO when a TCB Exists */
2377 sctp_input_init (vlib_main_t * vm)
2379 clib_error_t *error = 0;
2380 sctp_main_t *tm = vnet_get_sctp_main ();
2382 if ((error = vlib_call_init_function (vm, sctp_init)))
2385 /* Initialize dispatch table. */
2386 sctp_dispatch_table_init (tm);
2391 VLIB_INIT_FUNCTION (sctp_input_init);
2394 * fd.io coding-style-patch-verification: ON
2397 * eval: (c-set-style "gnu")