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;
323 ip6_address_t ip6_addr;
326 char hostname[FQDN_MAX_LENGTH];
328 /* Check the current state of the connection
330 * The logic required by the RFC4960 Section 5.2.2 is already taken care of
331 * in the code below and by the "sctp_prepare_initack_chunk" function.
332 * However, for debugging purposes it is nice to have a message printed out
333 * for these corner-case scenarios.
335 if (sctp_conn->state != SCTP_STATE_CLOSED)
336 { /* UNEXPECTED scenario */
337 switch (sctp_conn->state)
339 case SCTP_STATE_COOKIE_WAIT:
340 SCTP_ADV_DBG ("Received INIT chunk while in COOKIE_WAIT state");
341 sctp_prepare_initack_chunk_for_collision (sctp_conn,
342 SCTP_PRIMARY_PATH_IDX,
343 b0, &ip4_addr, &ip6_addr);
344 return SCTP_ERROR_NONE;
345 case SCTP_STATE_COOKIE_ECHOED:
346 case SCTP_STATE_SHUTDOWN_ACK_SENT:
347 SCTP_ADV_DBG ("Received INIT chunk while in COOKIE_ECHOED state");
348 if (sctp_conn->forming_association_changed == 0)
349 sctp_prepare_initack_chunk_for_collision (sctp_conn,
350 SCTP_PRIMARY_PATH_IDX,
354 sctp_prepare_abort_for_collision (sctp_conn,
355 SCTP_PRIMARY_PATH_IDX, b0,
356 &ip4_addr, &ip6_addr);
357 return SCTP_ERROR_NONE;
361 if (sctp_hdr->verification_tag != 0x0)
362 return SCTP_ERROR_INVALID_TAG_FOR_INIT;
365 * It is not possible to bundle any other CHUNK with the INIT chunk
367 if (sctp_is_bundling (sctp_implied_length, &init_chunk->chunk_hdr))
368 return SCTP_ERROR_BUNDLING_VIOLATION;
370 /* Save the INITIATE_TAG of the remote peer for this connection:
371 * it MUST be used for the VERIFICATION_TAG parameter in the SCTP HEADER */
372 sctp_conn->remote_tag = init_chunk->initiate_tag;
373 sctp_conn->remote_initial_tsn =
374 clib_net_to_host_u32 (init_chunk->initial_tsn);
375 sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn;
376 sctp_conn->next_tsn_expected = sctp_conn->remote_initial_tsn + 1;
377 SCTP_CONN_TRACKING_DBG ("sctp_conn->remote_initial_tsn = %u",
378 sctp_conn->remote_initial_tsn);
380 sctp_conn->peer_rwnd = clib_net_to_host_u32 (init_chunk->a_rwnd);
382 * If the length specified in the INIT message is bigger than the size in bytes of our structure it means that
383 * optional parameters have been sent with the INIT chunk and we need to parse them.
385 u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr);
386 if (length > sizeof (sctp_init_chunk_t))
388 /* There are optional parameters in the INIT chunk */
389 u16 pointer_offset = sizeof (sctp_init_chunk_t);
390 while (pointer_offset < length)
392 sctp_opt_params_hdr_t *opt_params_hdr =
393 (sctp_opt_params_hdr_t *) init_chunk + pointer_offset;
395 switch (clib_net_to_host_u16 (opt_params_hdr->type))
397 case SCTP_IPV4_ADDRESS_TYPE:
399 sctp_ipv4_addr_param_t *ipv4 =
400 (sctp_ipv4_addr_param_t *) opt_params_hdr;
401 clib_memcpy (&ip4_addr, &ipv4->address,
402 sizeof (ip4_address_t));
404 if (sctp_sub_connection_add_ip4 (vlib_get_main (),
406 [SCTP_PRIMARY_PATH_IDX].connection.
414 case SCTP_IPV6_ADDRESS_TYPE:
416 sctp_ipv6_addr_param_t *ipv6 =
417 (sctp_ipv6_addr_param_t *) opt_params_hdr;
418 clib_memcpy (&ip6_addr, &ipv6->address,
419 sizeof (ip6_address_t));
421 if (sctp_sub_connection_add_ip6 (vlib_get_main (),
423 [SCTP_PRIMARY_PATH_IDX].connection.
431 case SCTP_COOKIE_PRESERVATIVE_TYPE:
433 sctp_cookie_preservative_param_t *cookie_pres =
434 (sctp_cookie_preservative_param_t *) opt_params_hdr;
435 sctp_conn->peer_cookie_life_span_increment =
436 cookie_pres->life_span_inc;
439 case SCTP_HOSTNAME_ADDRESS_TYPE:
441 sctp_hostname_param_t *hostname_addr =
442 (sctp_hostname_param_t *) opt_params_hdr;
443 clib_memcpy (hostname, hostname_addr->hostname,
447 case SCTP_SUPPORTED_ADDRESS_TYPES:
453 pointer_offset += clib_net_to_host_u16 (opt_params_hdr->length);
457 /* Reuse buffer to make init-ack and send */
458 sctp_prepare_initack_chunk (sctp_conn, SCTP_PRIMARY_PATH_IDX, b0, &ip4_addr,
459 add_ip4, &ip6_addr, add_ip6);
460 return SCTP_ERROR_NONE;
464 sctp_is_valid_init_ack (sctp_header_t * sctp_hdr,
465 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
466 sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
467 u16 sctp_implied_length)
469 sctp_init_ack_chunk_t *init_ack_chunk =
470 (sctp_init_ack_chunk_t *) (sctp_hdr);
472 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
473 if (sctp_conn->local_tag != init_ack_chunk->sctp_hdr.verification_tag)
475 return SCTP_ERROR_INVALID_TAG;
479 * It is not possible to bundle any other CHUNK with the INIT_ACK chunk
481 if (sctp_is_bundling (sctp_implied_length, &init_ack_chunk->chunk_hdr))
482 return SCTP_ERROR_BUNDLING_VIOLATION;
484 return SCTP_ERROR_NONE;
488 sctp_handle_init_ack (sctp_header_t * sctp_hdr,
489 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
490 sctp_connection_t * sctp_conn, u8 idx,
491 vlib_buffer_t * b0, u16 sctp_implied_length)
493 sctp_init_ack_chunk_t *init_ack_chunk =
494 (sctp_init_ack_chunk_t *) (sctp_hdr);
496 char hostname[FQDN_MAX_LENGTH];
498 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
499 if (sctp_conn->local_tag != init_ack_chunk->sctp_hdr.verification_tag)
501 return SCTP_ERROR_INVALID_TAG;
505 * It is not possible to bundle any other CHUNK with the INIT chunk
507 if (sctp_is_bundling (sctp_implied_length, &init_ack_chunk->chunk_hdr))
508 return SCTP_ERROR_BUNDLING_VIOLATION;
510 /* Stop the T1_INIT timer */
511 sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T1_INIT);
513 sctp_calculate_rto (sctp_conn, idx);
515 /* remote_tag to be placed in the VERIFICATION_TAG field of the COOKIE_ECHO chunk */
516 sctp_conn->remote_tag = init_ack_chunk->initiate_tag;
517 sctp_conn->remote_initial_tsn =
518 clib_net_to_host_u32 (init_ack_chunk->initial_tsn);
519 sctp_conn->last_rcvd_tsn = sctp_conn->remote_initial_tsn;
520 sctp_conn->next_tsn_expected = sctp_conn->remote_initial_tsn + 1;
521 SCTP_CONN_TRACKING_DBG ("sctp_conn->remote_initial_tsn = %u",
522 sctp_conn->remote_initial_tsn);
523 sctp_conn->peer_rwnd = clib_net_to_host_u32 (init_ack_chunk->a_rwnd);
525 u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr);
527 if (length > sizeof (sctp_init_ack_chunk_t))
529 * There are optional parameters in the INIT ACK chunk
532 u16 pointer_offset = sizeof (sctp_init_ack_chunk_t);
534 while (pointer_offset < length)
536 sctp_opt_params_hdr_t *opt_params_hdr =
537 (sctp_opt_params_hdr_t *) ((char *) init_ack_chunk +
540 switch (clib_net_to_host_u16 (opt_params_hdr->type))
542 case SCTP_IPV4_ADDRESS_TYPE:
544 sctp_ipv4_addr_param_t *ipv4 =
545 (sctp_ipv4_addr_param_t *) opt_params_hdr;
547 sctp_sub_connection_add_ip4 (vlib_get_main (),
549 [SCTP_PRIMARY_PATH_IDX].connection.
550 lcl_ip.ip4, &ipv4->address);
554 case SCTP_IPV6_ADDRESS_TYPE:
556 sctp_ipv6_addr_param_t *ipv6 =
557 (sctp_ipv6_addr_param_t *) opt_params_hdr;
559 sctp_sub_connection_add_ip6 (vlib_get_main (),
561 [SCTP_PRIMARY_PATH_IDX].connection.
562 lcl_ip.ip6, &ipv6->address);
566 case SCTP_STATE_COOKIE_TYPE:
568 sctp_state_cookie_param_t *state_cookie_param =
569 (sctp_state_cookie_param_t *) opt_params_hdr;
571 clib_memcpy (&(sctp_conn->cookie_param), state_cookie_param,
572 sizeof (sctp_state_cookie_param_t));
576 case SCTP_HOSTNAME_ADDRESS_TYPE:
578 sctp_hostname_param_t *hostname_addr =
579 (sctp_hostname_param_t *) opt_params_hdr;
580 clib_memcpy (hostname, hostname_addr->hostname,
584 case SCTP_UNRECOGNIZED_TYPE:
589 u16 increment = clib_net_to_host_u16 (opt_params_hdr->length);
590 /* This indicates something really bad happened */
593 return SCTP_ERROR_INVALID_TAG;
595 pointer_offset += increment;
599 sctp_prepare_cookie_echo_chunk (sctp_conn, idx, b0, 1);
601 /* Start the T1_COOKIE timer */
602 sctp_timer_set (sctp_conn, idx,
603 SCTP_TIMER_T1_COOKIE, sctp_conn->sub_conn[idx].RTO);
605 return SCTP_ERROR_NONE;
608 /** Enqueue data out-of-order for delivery to application */
610 sctp_session_enqueue_data_ooo (sctp_connection_t * sctp_conn,
611 vlib_buffer_t * b, u16 data_len, u8 conn_idx)
613 int written, error = SCTP_ERROR_ENQUEUED;
616 session_enqueue_stream_connection (&sctp_conn->
617 sub_conn[conn_idx].connection, b, 0,
618 1 /* queue event */ ,
621 /* Update next_tsn_expected */
622 if (PREDICT_TRUE (written == data_len))
624 sctp_conn->next_tsn_expected += written;
626 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
627 sctp_conn->sub_conn[conn_idx].connection.c_index,
630 /* If more data written than expected, account for out-of-order bytes. */
631 else if (written > data_len)
633 sctp_conn->next_tsn_expected += written;
635 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
636 sctp_conn->sub_conn[conn_idx].connection.c_index,
639 else if (written > 0)
641 /* We've written something but FIFO is probably full now */
642 sctp_conn->next_tsn_expected += written;
644 error = SCTP_ERROR_PARTIALLY_ENQUEUED;
647 ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
648 sctp_conn->sub_conn[conn_idx].connection.c_index, written);
652 SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
653 sctp_conn->sub_conn[conn_idx].connection.c_index);
655 return SCTP_ERROR_FIFO_FULL;
658 /* TODO: Update out_of_order_map & SACK list */
663 /** Enqueue data for delivery to application */
665 sctp_session_enqueue_data (sctp_connection_t * sctp_conn, vlib_buffer_t * b,
666 u16 data_len, u8 conn_idx)
668 int written, error = SCTP_ERROR_ENQUEUED;
671 session_enqueue_stream_connection (&sctp_conn->
672 sub_conn[conn_idx].connection, b, 0,
673 1 /* queue event */ ,
676 /* Update next_tsn_expected */
677 if (PREDICT_TRUE (written == data_len))
679 sctp_conn->next_tsn_expected += written;
681 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
682 sctp_conn->sub_conn[conn_idx].connection.c_index,
685 /* If more data written than expected, account for out-of-order bytes. */
686 else if (written > data_len)
688 sctp_conn->next_tsn_expected += written;
690 SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
691 sctp_conn->sub_conn[conn_idx].connection.c_index,
694 else if (written > 0)
696 /* We've written something but FIFO is probably full now */
697 sctp_conn->next_tsn_expected += written;
699 error = SCTP_ERROR_PARTIALLY_ENQUEUED;
702 ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
703 sctp_conn->sub_conn[conn_idx].connection.c_index, written);
707 SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
708 sctp_conn->sub_conn[conn_idx].connection.c_index);
710 return SCTP_ERROR_FIFO_FULL;
717 sctp_is_sack_delayable (sctp_connection_t * sctp_conn, u8 idx, u8 is_gapping)
719 if (sctp_conn->conn_config.never_delay_sack)
721 SCTP_CONN_TRACKING_DBG ("sctp_conn->conn_config.never_delay_sack = ON");
725 /* Section 4.4 of the RFC4960 */
726 if (sctp_conn->state == SCTP_STATE_SHUTDOWN_SENT)
728 SCTP_CONN_TRACKING_DBG ("sctp_conn->state = %s; SACK not delayable",
729 sctp_state_to_string (sctp_conn->state));
735 SCTP_CONN_TRACKING_DBG
736 ("gapping != 0: CONN_INDEX = %u, sctp_conn->ack_state = %u",
737 sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
741 sctp_conn->ack_state += 1;
742 if (sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS)
744 SCTP_CONN_TRACKING_DBG
745 ("sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS: CONN_INDEX = %u, sctp_conn->ack_state = %u",
746 sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
754 sctp_is_connection_gapping (sctp_connection_t * sctp_conn, u32 tsn,
757 if (sctp_conn->next_tsn_expected != tsn) // It means data transmission is GAPPING
759 SCTP_CONN_TRACKING_DBG
760 ("GAPPING: CONN_INDEX = %u, sctp_conn->next_tsn_expected = %u, tsn = %u, diff = %u",
761 sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.c_index,
762 sctp_conn->next_tsn_expected, tsn,
763 sctp_conn->next_tsn_expected - tsn);
770 sctp_handle_data (sctp_payload_data_chunk_t * sctp_data_chunk,
771 sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b,
774 u32 error = 0, n_data_bytes;
777 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
778 if (sctp_conn->local_tag != sctp_data_chunk->sctp_hdr.verification_tag)
780 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
781 sctp_conn->sub_conn[idx].enqueue_state = SCTP_ERROR_INVALID_TAG;
782 return sctp_conn->sub_conn[idx].enqueue_state;
785 vnet_buffer (b)->sctp.sid = sctp_data_chunk->stream_id;
786 vnet_buffer (b)->sctp.ssn = sctp_data_chunk->stream_seq;
788 u32 tsn = clib_net_to_host_u32 (sctp_data_chunk->tsn);
790 vlib_buffer_advance (b, vnet_buffer (b)->sctp.data_offset);
791 u32 chunk_len = vnet_sctp_get_chunk_length (&sctp_data_chunk->chunk_hdr) -
792 (sizeof (sctp_payload_data_chunk_t) - sizeof (sctp_header_t));
794 ASSERT (vnet_buffer (b)->sctp.data_len);
797 /* Padding was added: see RFC 4096 section 3.3.1 */
798 if (vnet_buffer (b)->sctp.data_len > chunk_len)
800 /* Let's change the data_len to the right amount calculated here now.
801 * We cannot do that in the generic sctp46_input_dispatcher node since
802 * that is common to all CHUNKS handling.
804 vnet_buffer (b)->sctp.data_len = chunk_len;
805 /* We need to change b->current_length so that downstream calls to
806 * session_enqueue_stream_connection (called by sctp_session_enqueue_data)
807 * push the correct amount of data to be enqueued.
809 b->current_length = chunk_len;
811 n_data_bytes = vnet_buffer (b)->sctp.data_len;
813 sctp_is_connection_gapping (sctp_conn, tsn, &is_gapping);
815 sctp_conn->last_rcvd_tsn = tsn;
817 SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
819 u8 bbit = vnet_sctp_get_bbit (&sctp_data_chunk->chunk_hdr);
820 u8 ebit = vnet_sctp_get_ebit (&sctp_data_chunk->chunk_hdr);
822 if (bbit == 1 && ebit == 1) /* Unfragmented message */
824 /* In order data, enqueue. Fifo figures out by itself if any out-of-order
825 * segments can be enqueued after fifo tail offset changes. */
826 if (PREDICT_FALSE (is_gapping == 1))
828 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
830 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
832 else if (bbit == 1 && ebit == 0) /* First piece of a fragmented user message */
834 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
836 else if (bbit == 0 && ebit == 1) /* Last piece of a fragmented user message */
838 if (PREDICT_FALSE (is_gapping == 1))
840 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
842 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
844 else /* Middle piece of a fragmented user message */
846 if (PREDICT_FALSE (is_gapping == 1))
848 sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
850 error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
852 sctp_conn->last_rcvd_tsn = tsn;
854 SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
856 if (!sctp_is_sack_delayable (sctp_conn, idx, is_gapping))
858 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
859 sctp_prepare_sack_chunk (sctp_conn, idx, b);
862 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
864 sctp_conn->sub_conn[idx].enqueue_state = error;
870 sctp_handle_cookie_echo (sctp_header_t * sctp_hdr,
871 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
872 sctp_connection_t * sctp_conn, u8 idx,
873 vlib_buffer_t * b0, u16 * next0)
875 u64 now = sctp_time_now ();
877 sctp_cookie_echo_chunk_t *cookie_echo =
878 (sctp_cookie_echo_chunk_t *) sctp_hdr;
880 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
881 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
883 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
884 return SCTP_ERROR_INVALID_TAG;
887 sctp_calculate_rto (sctp_conn, idx);
890 clib_net_to_host_u64 (cookie_echo->cookie.creation_time);
891 u64 cookie_lifespan =
892 clib_net_to_host_u32 (cookie_echo->cookie.cookie_lifespan);
894 if (now > creation_time + cookie_lifespan)
896 SCTP_DBG ("now (%u) > creation_time (%u) + cookie_lifespan (%u)",
897 now, creation_time, cookie_lifespan);
898 return SCTP_ERROR_COOKIE_ECHO_VIOLATION;
901 sctp_prepare_cookie_ack_chunk (sctp_conn, idx, b0);
904 sctp_conn->state = SCTP_STATE_ESTABLISHED;
905 sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_STATE_UP;
906 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
908 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
909 sctp_conn->sub_conn[idx].RTO);
911 stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
913 return SCTP_ERROR_NONE;
918 sctp_handle_cookie_ack (sctp_header_t * sctp_hdr,
919 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
920 sctp_connection_t * sctp_conn, u8 idx,
921 vlib_buffer_t * b0, u16 * next0)
923 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
924 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
926 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
927 return SCTP_ERROR_INVALID_TAG;
930 sctp_calculate_rto (sctp_conn, idx);
932 sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T1_COOKIE);
934 sctp_conn->state = SCTP_STATE_ESTABLISHED;
935 sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_STATE_UP;
937 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
939 sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
940 sctp_conn->sub_conn[idx].RTO);
942 stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
944 return SCTP_ERROR_NONE;
949 sctp46_rcv_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
950 vlib_frame_t * from_frame, int is_ip4)
952 sctp_main_t *tm = vnet_get_sctp_main ();
954 u32 n_left_from, next_index, *from, *to_next;
955 u32 my_thread_index = vm->thread_index;
957 from = vlib_frame_vector_args (from_frame);
958 n_left_from = from_frame->n_vectors;
960 next_index = node->cached_next_index;
962 while (n_left_from > 0)
966 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
968 while (n_left_from > 0 && n_left_to_next > 0)
972 sctp_header_t *sctp_hdr = 0;
973 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
974 ip4_header_t *ip4_hdr = 0;
975 ip6_header_t *ip6_hdr = 0;
976 sctp_connection_t *sctp_conn, *new_sctp_conn;
977 u16 sctp_implied_length = 0;
978 u16 error0 = SCTP_ERROR_NONE, next0 = sctp_next_drop (is_ip4);
988 b0 = vlib_get_buffer (vm, bi0);
990 /* If we are in SCTP_COOKIE_WAIT_STATE then the connection
991 * will come from the half-open connections pool.
994 sctp_half_open_connection_get (vnet_buffer (b0)->
995 sctp.connection_index);
997 if (PREDICT_FALSE (sctp_conn == 0))
1000 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1001 error0 = SCTP_ERROR_INVALID_CONNECTION;
1006 ip4_hdr = vlib_buffer_get_current (b0);
1007 sctp_hdr = ip4_next_header (ip4_hdr);
1008 idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
1012 ip6_hdr = vlib_buffer_get_current (b0);
1013 sctp_hdr = ip6_next_header (ip6_hdr);
1014 idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
1017 sctp_conn->sub_conn[idx].subconn_idx = idx;
1018 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1021 (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
1023 sctp_implied_length =
1024 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1026 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
1032 sctp_is_valid_init_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1033 b0, sctp_implied_length);
1035 if (error0 == SCTP_ERROR_NONE)
1037 pool_get (tm->connections[my_thread_index], new_sctp_conn);
1038 clib_memcpy (new_sctp_conn, sctp_conn,
1039 sizeof (*new_sctp_conn));
1040 new_sctp_conn->sub_conn[idx].c_c_index =
1041 new_sctp_conn - tm->connections[my_thread_index];
1042 new_sctp_conn->sub_conn[idx].c_thread_index =
1044 new_sctp_conn->sub_conn[idx].PMTU =
1045 sctp_conn->sub_conn[idx].PMTU;
1046 new_sctp_conn->sub_conn[idx].subconn_idx = idx;
1048 if (sctp_half_open_connection_cleanup (sctp_conn))
1051 ("Cannot cleanup half-open connection; not the owning thread");
1054 sctp_connection_timers_init (new_sctp_conn);
1056 sctp_init_cwnd (new_sctp_conn);
1059 sctp_handle_init_ack (sctp_hdr, sctp_chunk_hdr,
1060 new_sctp_conn, idx, b0,
1061 sctp_implied_length);
1063 if (session_stream_connect_notify
1064 (&new_sctp_conn->sub_conn[idx].connection, 0))
1067 ("conn_index = %u: session_stream_connect_notify error; cleaning up connection",
1068 new_sctp_conn->sub_conn[idx].connection.c_index);
1069 sctp_connection_cleanup (new_sctp_conn);
1072 next0 = sctp_next_output (is_ip4);
1076 case OPERATION_ERROR:
1078 sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0,
1082 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1083 * are handled by the input-dispatcher function using the table-lookup
1084 * hence we should never get to the "default" case below.
1087 error0 = SCTP_ERROR_UNKNOWN_CHUNK;
1088 next0 = sctp_next_drop (is_ip4);
1092 if (error0 != SCTP_ERROR_NONE)
1094 clib_warning ("error while parsing chunk");
1095 sctp_connection_cleanup (sctp_conn);
1096 next0 = sctp_next_drop (is_ip4);
1101 b0->error = node->errors[error0];
1102 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1104 sctp_rx_trace_t *t0 =
1105 vlib_add_trace (vm, node, b0, sizeof (*t0));
1106 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
1109 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1110 n_left_to_next, bi0, next0);
1113 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1115 return from_frame->n_vectors;
1119 sctp4_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1120 vlib_frame_t * from_frame)
1122 return sctp46_rcv_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1126 sctp6_rcv_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1127 vlib_frame_t * from_frame)
1129 return sctp46_rcv_phase_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1133 format_sctp_rx_trace_short (u8 * s, va_list * args)
1135 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1136 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1137 sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
1139 s = format (s, "%d -> %d (%U)",
1140 clib_net_to_host_u16 (t->sctp_header.src_port),
1141 clib_net_to_host_u16 (t->sctp_header.dst_port),
1142 format_sctp_state, t->sctp_connection.state);
1148 VLIB_REGISTER_NODE (sctp4_rcv_phase_node) =
1150 .function = sctp4_rcv_phase,
1151 .name = "sctp4-rcv",
1152 /* Takes a vector of packets. */
1153 .vector_size = sizeof (u32),
1154 .n_errors = SCTP_N_ERROR,
1155 .error_strings = sctp_error_strings,
1156 .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1159 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1160 foreach_sctp_state_next
1163 .format_trace = format_sctp_rx_trace_short,
1167 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_rcv_phase_node, sctp4_rcv_phase);
1170 VLIB_REGISTER_NODE (sctp6_init_phase_node) =
1172 .function = sctp6_rcv_phase,
1173 .name = "sctp6-rcv",
1174 /* Takes a vector of packets. */
1175 .vector_size = sizeof (u32),
1176 .n_errors = SCTP_N_ERROR,
1177 .error_strings = sctp_error_strings,
1178 .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1181 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1182 foreach_sctp_state_next
1185 .format_trace = format_sctp_rx_trace_short,
1189 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_init_phase_node, sctp6_rcv_phase);
1191 vlib_node_registration_t sctp4_shutdown_phase_node;
1192 vlib_node_registration_t sctp6_shutdown_phase_node;
1195 sctp_handle_shutdown (sctp_header_t * sctp_hdr,
1196 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1197 sctp_connection_t * sctp_conn, u8 idx,
1198 vlib_buffer_t * b0, u16 sctp_implied_length,
1201 sctp_shutdown_association_chunk_t *shutdown_chunk =
1202 (sctp_shutdown_association_chunk_t *) (sctp_hdr);
1204 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1205 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1207 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1208 return SCTP_ERROR_INVALID_TAG;
1212 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1214 if (sctp_is_bundling (sctp_implied_length, &shutdown_chunk->chunk_hdr))
1215 return SCTP_ERROR_BUNDLING_VIOLATION;
1217 switch (sctp_conn->state)
1219 case SCTP_STATE_ESTABLISHED:
1220 if (sctp_check_outstanding_data_chunks (sctp_conn) == 0)
1221 sctp_conn->state = SCTP_STATE_SHUTDOWN_RECEIVED;
1222 sctp_send_shutdown_ack (sctp_conn, idx, b0);
1225 case SCTP_STATE_SHUTDOWN_SENT:
1226 sctp_send_shutdown_ack (sctp_conn, idx, b0);
1230 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
1232 return SCTP_ERROR_NONE;
1236 sctp_handle_shutdown_ack (sctp_header_t * sctp_hdr,
1237 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1238 sctp_connection_t * sctp_conn, u8 idx,
1239 vlib_buffer_t * b0, u16 sctp_implied_length,
1242 sctp_shutdown_ack_chunk_t *shutdown_ack_chunk =
1243 (sctp_shutdown_ack_chunk_t *) (sctp_hdr);
1245 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1246 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1248 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1249 return SCTP_ERROR_INVALID_TAG;
1253 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1255 if (sctp_is_bundling (sctp_implied_length, &shutdown_ack_chunk->chunk_hdr))
1256 return SCTP_ERROR_BUNDLING_VIOLATION;
1258 /* Whether we are in SCTP_STATE_SHUTDOWN_SENT or SCTP_STATE_SHUTDOWN_ACK_SENT
1259 * the reception of a SHUTDOWN_ACK chunk leads to the same actions:
1260 * - STOP T2_SHUTDOWN timer
1261 * - SEND SHUTDOWN_COMPLETE chunk
1263 sctp_timer_reset (sctp_conn, SCTP_PRIMARY_PATH_IDX, SCTP_TIMER_T2_SHUTDOWN);
1265 sctp_send_shutdown_complete (sctp_conn, idx, b0);
1267 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
1269 return SCTP_ERROR_NONE;
1273 sctp_handle_shutdown_complete (sctp_header_t * sctp_hdr,
1274 sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1275 sctp_connection_t * sctp_conn, u8 idx,
1276 vlib_buffer_t * b0, u16 sctp_implied_length,
1279 sctp_shutdown_complete_chunk_t *shutdown_complete =
1280 (sctp_shutdown_complete_chunk_t *) (sctp_hdr);
1282 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1283 if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1285 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1286 return SCTP_ERROR_INVALID_TAG;
1290 * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1292 if (sctp_is_bundling (sctp_implied_length, &shutdown_complete->chunk_hdr))
1293 return SCTP_ERROR_BUNDLING_VIOLATION;
1295 sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T2_SHUTDOWN);
1297 stream_session_disconnect_notify (&sctp_conn->sub_conn[idx].connection);
1299 sctp_conn->state = SCTP_STATE_CLOSED;
1301 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1303 return SCTP_ERROR_NONE;
1307 sctp46_shutdown_phase_inline (vlib_main_t * vm,
1308 vlib_node_runtime_t * node,
1309 vlib_frame_t * from_frame, int is_ip4)
1311 u32 n_left_from, next_index, *from, *to_next;
1312 u32 my_thread_index = vm->thread_index;
1314 from = vlib_frame_vector_args (from_frame);
1315 n_left_from = from_frame->n_vectors;
1317 next_index = node->cached_next_index;
1319 while (n_left_from > 0)
1323 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1325 while (n_left_from > 0 && n_left_to_next > 0)
1329 sctp_rx_trace_t *sctp_trace;
1330 sctp_header_t *sctp_hdr = 0;
1331 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1332 ip4_header_t *ip4_hdr = 0;
1333 ip6_header_t *ip6_hdr = 0;
1334 sctp_connection_t *sctp_conn;
1335 u16 sctp_implied_length = 0;
1336 u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_RCV_PHASE_N_NEXT;
1344 n_left_to_next -= 1;
1346 b0 = vlib_get_buffer (vm, bi0);
1348 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1351 if (PREDICT_FALSE (sctp_conn == 0))
1354 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1355 error0 = SCTP_ERROR_INVALID_CONNECTION;
1361 ip4_hdr = vlib_buffer_get_current (b0);
1362 sctp_hdr = ip4_next_header (ip4_hdr);
1363 idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
1367 ip6_hdr = vlib_buffer_get_current (b0);
1368 sctp_hdr = ip6_next_header (ip6_hdr);
1369 idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
1372 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1373 sctp_chunk_hdr = &full_hdr->common_hdr;
1375 sctp_implied_length =
1376 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1378 u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
1383 sctp_handle_shutdown (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1384 idx, b0, sctp_implied_length, &next0);
1389 sctp_handle_shutdown_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1390 idx, b0, sctp_implied_length,
1394 case SHUTDOWN_COMPLETE:
1396 sctp_handle_shutdown_complete (sctp_hdr, sctp_chunk_hdr,
1398 sctp_implied_length, &next0);
1400 sctp_connection_cleanup (sctp_conn);
1404 * DATA chunks can still be transmitted/received in the SHUTDOWN-PENDING
1405 * and SHUTDOWN-SENT states (as per RFC4960 Section 6)
1409 sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
1410 sctp_conn, idx, b0, &next0);
1413 case OPERATION_ERROR:
1415 sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0,
1419 case COOKIE_ECHO: /* Cookie Received While Shutting Down */
1420 sctp_prepare_operation_error (sctp_conn, idx, b0,
1421 COOKIE_RECEIVED_WHILE_SHUTTING_DOWN);
1422 error0 = SCTP_ERROR_NONE;
1423 next0 = sctp_next_output (is_ip4);
1425 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1426 * are handled by the input-dispatcher function using the table-lookup
1427 * hence we should never get to the "default" case below.
1430 error0 = SCTP_ERROR_UNKNOWN_CHUNK;
1431 next0 = sctp_next_drop (is_ip4);
1435 if (error0 != SCTP_ERROR_NONE)
1437 clib_warning ("error while parsing chunk");
1438 sctp_connection_cleanup (sctp_conn);
1439 next0 = sctp_next_drop (is_ip4);
1444 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1447 vlib_add_trace (vm, node, b0, sizeof (*sctp_trace));
1449 if (sctp_hdr != NULL)
1450 clib_memcpy (&sctp_trace->sctp_header, sctp_hdr,
1451 sizeof (sctp_trace->sctp_header));
1453 if (sctp_conn != NULL)
1454 clib_memcpy (&sctp_trace->sctp_connection, sctp_conn,
1455 sizeof (sctp_trace->sctp_connection));
1458 b0->error = node->errors[error0];
1460 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1461 n_left_to_next, bi0, next0);
1464 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1467 return from_frame->n_vectors;
1472 sctp4_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1473 vlib_frame_t * from_frame)
1475 return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1479 sctp6_shutdown_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1480 vlib_frame_t * from_frame)
1482 return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1486 VLIB_REGISTER_NODE (sctp4_shutdown_phase_node) =
1488 .function = sctp4_shutdown_phase,
1489 .name = "sctp4-shutdown",
1490 /* Takes a vector of packets. */
1491 .vector_size = sizeof (u32),
1492 .n_errors = SCTP_N_ERROR,
1493 .error_strings = sctp_error_strings,
1494 .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1497 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1498 foreach_sctp_state_next
1501 .format_trace = format_sctp_rx_trace_short,
1505 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_shutdown_phase_node,
1506 sctp4_shutdown_phase);
1509 VLIB_REGISTER_NODE (sctp6_shutdown_phase_node) =
1511 .function = sctp6_shutdown_phase,
1512 .name = "sctp6-shutdown",
1513 /* Takes a vector of packets. */
1514 .vector_size = sizeof (u32),
1515 .n_errors = SCTP_N_ERROR,
1516 .error_strings = sctp_error_strings,
1517 .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1520 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1521 foreach_sctp_state_next
1524 .format_trace = format_sctp_rx_trace_short,
1528 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_shutdown_phase_node,
1529 sctp6_shutdown_phase);
1531 vlib_node_registration_t sctp4_listen_phase_node;
1532 vlib_node_registration_t sctp6_listen_phase_node;
1534 vlib_node_registration_t sctp4_established_phase_node;
1535 vlib_node_registration_t sctp6_established_phase_node;
1538 sctp_handle_sack (sctp_selective_ack_chunk_t * sack_chunk,
1539 sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b0,
1543 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1544 if (sctp_conn->local_tag != sack_chunk->sctp_hdr.verification_tag)
1546 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1547 return SCTP_ERROR_INVALID_TAG;
1550 sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_SACK_RECEIVED;
1552 sctp_conn->sub_conn[idx].last_seen = sctp_time_now ();
1554 /* Section 7.2.2; point (2) */
1555 if (sctp_conn->sub_conn[idx].cwnd > sctp_conn->sub_conn[idx].ssthresh)
1556 sctp_conn->sub_conn[idx].partially_acked_bytes =
1557 sctp_conn->next_tsn - sack_chunk->cumulative_tsn_ack;
1559 /* Section 7.2.2; point (5) */
1560 if (sctp_conn->next_tsn - sack_chunk->cumulative_tsn_ack == 0)
1561 sctp_conn->sub_conn[idx].partially_acked_bytes = 0;
1563 sctp_conn->last_unacked_tsn = sack_chunk->cumulative_tsn_ack;
1565 sctp_calculate_rto (sctp_conn, idx);
1567 sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T3_RXTX,
1568 sctp_conn->sub_conn[idx].RTO);
1570 sctp_conn->sub_conn[idx].RTO_pending = 0;
1572 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1574 return SCTP_ERROR_NONE;
1578 sctp_handle_heartbeat (sctp_hb_req_chunk_t * sctp_hb_chunk,
1579 sctp_connection_t * sctp_conn, u8 idx,
1580 vlib_buffer_t * b0, u16 * next0)
1582 /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1583 if (sctp_conn->local_tag != sctp_hb_chunk->sctp_hdr.verification_tag)
1585 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1586 return SCTP_ERROR_INVALID_TAG;
1589 sctp_prepare_heartbeat_ack_chunk (sctp_conn, idx, b0);
1591 *next0 = sctp_next_output (sctp_conn->sub_conn[idx].connection.is_ip4);
1593 return SCTP_ERROR_NONE;
1597 sctp_handle_heartbeat_ack (sctp_hb_ack_chunk_t * sctp_hb_ack_chunk,
1598 sctp_connection_t * sctp_conn, u8 idx,
1599 vlib_buffer_t * b0, u16 * next0)
1601 sctp_conn->sub_conn[idx].last_seen = sctp_time_now ();
1603 sctp_conn->sub_conn[idx].unacknowledged_hb -= 1;
1605 sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
1606 sctp_conn->sub_conn[idx].RTO);
1608 *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1610 return SCTP_ERROR_NONE;
1614 sctp_node_inc_counter (vlib_main_t * vm, u32 sctp4_node, u32 sctp6_node,
1615 u8 is_ip4, u8 evt, u8 val)
1617 if (PREDICT_TRUE (!val))
1621 vlib_node_increment_counter (vm, sctp4_node, evt, val);
1623 vlib_node_increment_counter (vm, sctp6_node, evt, val);
1627 sctp46_listen_process_inline (vlib_main_t * vm,
1628 vlib_node_runtime_t * node,
1629 vlib_frame_t * from_frame, int is_ip4)
1631 u32 n_left_from, next_index, *from, *to_next;
1632 u32 my_thread_index = vm->thread_index;
1634 from = vlib_frame_vector_args (from_frame);
1635 n_left_from = from_frame->n_vectors;
1637 next_index = node->cached_next_index;
1639 while (n_left_from > 0)
1643 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1645 while (n_left_from > 0 && n_left_to_next > 0)
1649 sctp_header_t *sctp_hdr = 0;
1650 ip4_header_t *ip4_hdr;
1651 ip6_header_t *ip6_hdr;
1652 sctp_connection_t *child_conn;
1653 sctp_connection_t *sctp_listener;
1654 u16 next0 = sctp_next_drop (is_ip4), error0 = SCTP_ERROR_ENQUEUED;
1661 n_left_to_next -= 1;
1663 b0 = vlib_get_buffer (vm, bi0);
1665 sctp_listener_get (vnet_buffer (b0)->sctp.connection_index);
1669 ip4_hdr = vlib_buffer_get_current (b0);
1670 sctp_hdr = ip4_next_header (ip4_hdr);
1674 ip6_hdr = vlib_buffer_get_current (b0);
1675 sctp_hdr = ip6_next_header (ip6_hdr);
1679 sctp_lookup_connection (sctp_listener->sub_conn
1680 [SCTP_PRIMARY_PATH_IDX].c_fib_index, b0,
1681 my_thread_index, is_ip4);
1683 if (PREDICT_FALSE (child_conn->state != SCTP_STATE_CLOSED))
1686 ("conn_index = %u: child_conn->state != SCTP_STATE_CLOSED.... STATE=%s",
1687 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].
1689 sctp_state_to_string (child_conn->state));
1690 error0 = SCTP_ERROR_CREATE_EXISTS;
1694 /* Create child session and send SYN-ACK */
1695 child_conn = sctp_connection_new (my_thread_index);
1696 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].subconn_idx =
1697 SCTP_PRIMARY_PATH_IDX;
1698 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_lcl_port =
1700 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_rmt_port =
1702 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_is_ip4 = is_ip4;
1703 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.proto =
1704 sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.proto;
1705 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].PMTU =
1706 sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX].PMTU;
1707 child_conn->state = SCTP_STATE_CLOSED;
1708 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.fib_index =
1709 sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX].
1710 connection.fib_index;
1714 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_lcl_ip4.as_u32 =
1715 ip4_hdr->dst_address.as_u32;
1716 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_rmt_ip4.as_u32 =
1717 ip4_hdr->src_address.as_u32;
1721 clib_memcpy (&child_conn->
1722 sub_conn[SCTP_PRIMARY_PATH_IDX].c_lcl_ip6,
1723 &ip6_hdr->dst_address, sizeof (ip6_address_t));
1724 clib_memcpy (&child_conn->
1725 sub_conn[SCTP_PRIMARY_PATH_IDX].c_rmt_ip6,
1726 &ip6_hdr->src_address, sizeof (ip6_address_t));
1729 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1730 sctp_chunks_common_hdr_t *sctp_chunk_hdr = &full_hdr->common_hdr;
1732 u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
1733 if (chunk_type != INIT && chunk_type != DATA
1734 && chunk_type != OPERATION_ERROR)
1737 ("conn_index = %u: chunk_type != INIT... chunk_type=%s",
1738 child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].
1739 connection.c_index, sctp_chunk_to_string (chunk_type));
1741 error0 = SCTP_ERROR_UNKNOWN_CHUNK;
1742 next0 = sctp_next_drop (is_ip4);
1746 u16 sctp_implied_length =
1747 sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1752 sctp_connection_timers_init (child_conn);
1754 sctp_init_snd_vars (child_conn);
1756 sctp_init_cwnd (child_conn);
1759 sctp_handle_init (sctp_hdr, sctp_chunk_hdr, child_conn, b0,
1760 sctp_implied_length);
1762 if (error0 == SCTP_ERROR_NONE)
1764 if (stream_session_accept
1766 sub_conn[SCTP_PRIMARY_PATH_IDX].connection,
1768 sub_conn[SCTP_PRIMARY_PATH_IDX].c_s_index, 0))
1770 clib_warning ("session accept fail");
1771 sctp_connection_cleanup (child_conn);
1772 error0 = SCTP_ERROR_CREATE_SESSION_FAIL;
1775 next0 = sctp_next_output (is_ip4);
1779 /* Reception of a DATA chunk whilst in the CLOSED state is called
1780 * "Out of the Blue" packet and handling of the chunk needs special treatment
1781 * as per RFC4960 section 8.4
1786 case OPERATION_ERROR:
1788 sctp_handle_operation_err (sctp_hdr, child_conn,
1789 SCTP_PRIMARY_PATH_IDX, b0, &next0);
1794 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1796 sctp_rx_trace_t *t0 =
1797 vlib_add_trace (vm, node, b0, sizeof (*t0));
1798 clib_memcpy (&t0->sctp_header, sctp_hdr,
1799 sizeof (t0->sctp_header));
1800 clib_memcpy (&t0->sctp_connection, sctp_listener,
1801 sizeof (t0->sctp_connection));
1804 b0->error = node->errors[error0];
1806 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1807 n_left_to_next, bi0, next0);
1809 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1812 return from_frame->n_vectors;
1816 sctp4_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1817 vlib_frame_t * from_frame)
1819 return sctp46_listen_process_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1823 sctp6_listen_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1824 vlib_frame_t * from_frame)
1826 return sctp46_listen_process_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1830 sctp46_established_phase_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
1831 vlib_frame_t * from_frame, int is_ip4)
1833 u32 n_left_from, next_index, *from, *to_next;
1834 u32 my_thread_index = vm->thread_index, errors = 0;
1836 from = vlib_frame_vector_args (from_frame);
1837 n_left_from = from_frame->n_vectors;
1839 next_index = node->cached_next_index;
1841 while (n_left_from > 0)
1845 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1847 while (n_left_from > 0 && n_left_to_next > 0)
1851 sctp_header_t *sctp_hdr = 0;
1852 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1853 ip4_header_t *ip4_hdr = 0;
1854 ip6_header_t *ip6_hdr = 0;
1855 sctp_connection_t *sctp_conn;
1856 u16 error0 = SCTP_ERROR_ENQUEUED, next0 =
1857 SCTP_ESTABLISHED_PHASE_N_NEXT;
1865 n_left_to_next -= 1;
1867 b0 = vlib_get_buffer (vm, bi0);
1869 sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1872 if (PREDICT_FALSE (sctp_conn == 0))
1875 ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1876 error0 = SCTP_ERROR_INVALID_CONNECTION;
1881 ip4_hdr = vlib_buffer_get_current (b0);
1882 sctp_hdr = ip4_next_header (ip4_hdr);
1883 idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
1887 ip6_hdr = vlib_buffer_get_current (b0);
1888 sctp_hdr = ip6_next_header (ip6_hdr);
1889 idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
1892 sctp_conn->sub_conn[idx].subconn_idx = idx;
1894 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1896 (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
1898 u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
1904 sctp_handle_cookie_echo (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1910 sctp_handle_cookie_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1916 sctp_handle_sack ((sctp_selective_ack_chunk_t *) sctp_hdr,
1917 sctp_conn, idx, b0, &next0);
1922 sctp_handle_heartbeat ((sctp_hb_req_chunk_t *) sctp_hdr,
1923 sctp_conn, idx, b0, &next0);
1928 sctp_handle_heartbeat_ack ((sctp_hb_ack_chunk_t *) sctp_hdr,
1929 sctp_conn, idx, b0, &next0);
1934 sctp_handle_data ((sctp_payload_data_chunk_t *) sctp_hdr,
1935 sctp_conn, idx, b0, &next0);
1938 case OPERATION_ERROR:
1940 sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0,
1944 /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1945 * are handled by the input-dispatcher function using the table-lookup
1946 * hence we should never get to the "default" case below.
1949 error0 = SCTP_ERROR_UNKNOWN_CHUNK;
1950 next0 = sctp_next_drop (is_ip4);
1955 b0->error = node->errors[error0];
1956 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1958 sctp_rx_trace_t *t0 =
1959 vlib_add_trace (vm, node, b0, sizeof (*t0));
1960 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
1963 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1964 n_left_to_next, bi0, next0);
1967 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1970 errors = session_manager_flush_enqueue_events (TRANSPORT_PROTO_SCTP,
1973 sctp_node_inc_counter (vm, is_ip4, sctp4_established_phase_node.index,
1974 sctp6_established_phase_node.index,
1975 SCTP_ERROR_EVENT_FIFO_FULL, errors);
1976 sctp_flush_frame_to_output (vm, my_thread_index, is_ip4);
1978 return from_frame->n_vectors;
1982 sctp4_established_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1983 vlib_frame_t * from_frame)
1985 return sctp46_established_phase_inline (vm, node, from_frame,
1990 sctp6_established_phase (vlib_main_t * vm, vlib_node_runtime_t * node,
1991 vlib_frame_t * from_frame)
1993 return sctp46_established_phase_inline (vm, node, from_frame,
1998 format_sctp_rx_trace (u8 * s, va_list * args)
2000 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2001 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2002 sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
2003 u32 indent = format_get_indent (s);
2005 s = format (s, "%U\n%U%U",
2006 format_sctp_header, &t->sctp_header, 128,
2007 format_white_space, indent,
2008 format_sctp_connection, &t->sctp_connection, 1);
2014 VLIB_REGISTER_NODE (sctp4_listen_phase_node) =
2016 .function = sctp4_listen_phase,
2017 .name = "sctp4-listen",
2018 /* Takes a vector of packets. */
2019 .vector_size = sizeof (u32),
2020 .n_errors = SCTP_N_ERROR,
2021 .error_strings = sctp_error_strings,
2022 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
2025 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
2026 foreach_sctp_state_next
2029 .format_trace = format_sctp_rx_trace_short,
2033 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_listen_phase_node, sctp4_listen_phase);
2036 VLIB_REGISTER_NODE (sctp6_listen_phase_node) =
2038 .function = sctp6_listen_phase,
2039 .name = "sctp6-listen",
2040 /* Takes a vector of packets. */
2041 .vector_size = sizeof (u32),
2042 .n_errors = SCTP_N_ERROR,
2043 .error_strings = sctp_error_strings,
2044 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
2047 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
2048 foreach_sctp_state_next
2051 .format_trace = format_sctp_rx_trace_short,
2055 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_listen_phase_node, sctp6_listen_phase);
2058 VLIB_REGISTER_NODE (sctp4_established_phase_node) =
2060 .function = sctp4_established_phase,
2061 .name = "sctp4-established",
2062 /* Takes a vector of packets. */
2063 .vector_size = sizeof (u32),
2064 .n_errors = SCTP_N_ERROR,
2065 .error_strings = sctp_error_strings,
2066 .n_next_nodes = SCTP_ESTABLISHED_PHASE_N_NEXT,
2069 #define _(s,n) [SCTP_ESTABLISHED_PHASE_NEXT_##s] = n,
2070 foreach_sctp_state_next
2073 .format_trace = format_sctp_rx_trace_short,
2077 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_established_phase_node,
2078 sctp4_established_phase);
2081 VLIB_REGISTER_NODE (sctp6_established_phase_node) =
2083 .function = sctp6_established_phase,
2084 .name = "sctp6-established",
2085 /* Takes a vector of packets. */
2086 .vector_size = sizeof (u32),
2087 .n_errors = SCTP_N_ERROR,
2088 .error_strings = sctp_error_strings,
2089 .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
2092 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
2093 foreach_sctp_state_next
2096 .format_trace = format_sctp_rx_trace_short,
2100 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_established_phase_node,
2101 sctp6_established_phase);
2104 * This is the function executed first for the SCTP graph.
2105 * It takes care of doing the initial message parsing and
2106 * dispatch to the specialized function.
2109 sctp46_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2110 vlib_frame_t * from_frame, int is_ip4)
2112 u32 n_left_from, next_index, *from, *to_next;
2113 u32 my_thread_index = vm->thread_index;
2115 sctp_main_t *tm = vnet_get_sctp_main ();
2117 from = vlib_frame_vector_args (from_frame);
2118 n_left_from = from_frame->n_vectors;
2119 next_index = node->cached_next_index;
2120 sctp_set_time_now (my_thread_index);
2122 while (n_left_from > 0)
2126 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2128 while (n_left_from > 0 && n_left_to_next > 0)
2130 int n_advance_bytes0, n_data_bytes0;
2131 u32 bi0, fib_index0;
2133 sctp_header_t *sctp_hdr = 0;
2134 sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
2135 sctp_connection_t *sctp_conn;
2136 transport_connection_t *trans_conn;
2137 ip4_header_t *ip4_hdr;
2138 ip6_header_t *ip6_hdr;
2139 u32 error0 = SCTP_ERROR_NO_LISTENER, next0 = SCTP_INPUT_NEXT_DROP;
2146 n_left_to_next -= 1;
2148 b0 = vlib_get_buffer (vm, bi0);
2149 vnet_buffer (b0)->sctp.flags = 0;
2150 fib_index0 = vnet_buffer (b0)->ip.fib_index;
2152 /* Checksum computed by ipx_local no need to compute again */
2156 ip4_hdr = vlib_buffer_get_current (b0);
2157 sctp_hdr = ip4_next_header (ip4_hdr);
2159 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
2160 sctp_chunk_hdr = &full_hdr->common_hdr;
2163 (ip4_header_bytes (ip4_hdr) +
2164 sizeof (sctp_payload_data_chunk_t));
2166 clib_net_to_host_u16 (ip4_hdr->length) - n_advance_bytes0;
2168 trans_conn = session_lookup_connection_wt4 (fib_index0,
2169 &ip4_hdr->dst_address,
2170 &ip4_hdr->src_address,
2173 TRANSPORT_PROTO_SCTP,
2179 ip6_hdr = vlib_buffer_get_current (b0);
2180 sctp_hdr = ip6_next_header (ip6_hdr);
2182 sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
2183 sctp_chunk_hdr = &full_hdr->common_hdr;
2185 n_advance_bytes0 = sctp_header_bytes ();
2187 clib_net_to_host_u16 (ip6_hdr->payload_length) -
2189 n_advance_bytes0 += sizeof (ip6_hdr[0]);
2191 trans_conn = session_lookup_connection_wt6 (fib_index0,
2192 &ip6_hdr->dst_address,
2193 &ip6_hdr->src_address,
2196 TRANSPORT_PROTO_SCTP,
2202 if (PREDICT_FALSE (n_advance_bytes0 < 0))
2204 error0 = SCTP_ERROR_LENGTH;
2208 sctp_conn = sctp_get_connection_from_transport (trans_conn);
2209 vnet_sctp_common_hdr_params_net_to_host (sctp_chunk_hdr);
2211 u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
2212 if (chunk_type >= UNKNOWN)
2215 ("Received an unrecognized chunk; sending back OPERATION_ERROR chunk");
2217 sctp_prepare_operation_error (sctp_conn, SCTP_PRIMARY_PATH_IDX,
2218 b0, UNRECOGNIZED_CHUNK_TYPE);
2220 error0 = SCTP_ERROR_UNKNOWN_CHUNK;
2221 next0 = sctp_next_output (is_ip4);
2225 vnet_buffer (b0)->sctp.hdr_offset =
2226 (u8 *) sctp_hdr - (u8 *) vlib_buffer_get_current (b0);
2228 /* Session exists */
2229 if (PREDICT_TRUE (0 != sctp_conn))
2231 /* Save connection index */
2232 vnet_buffer (b0)->sctp.connection_index = trans_conn->c_index;
2233 vnet_buffer (b0)->sctp.data_offset = n_advance_bytes0;
2234 vnet_buffer (b0)->sctp.data_len = n_data_bytes0;
2236 next0 = tm->dispatch_table[sctp_conn->state][chunk_type].next;
2237 error0 = tm->dispatch_table[sctp_conn->state][chunk_type].error;
2239 SCTP_DBG_STATE_MACHINE
2240 ("S_INDEX = %u, C_INDEX = %u, TRANS_CONN = %p, SCTP_CONN = %p, CURRENT_CONNECTION_STATE = %s,"
2241 "CHUNK_TYPE_RECEIVED = %s " "NEXT_PHASE = %s",
2242 sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].
2244 sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].
2245 connection.c_index, trans_conn, sctp_conn,
2246 sctp_state_to_string (sctp_conn->state),
2247 sctp_chunk_to_string (chunk_type), phase_to_string (next0));
2249 if (chunk_type == DATA)
2250 SCTP_ADV_DBG ("n_advance_bytes0 = %u, n_data_bytes0 = %u",
2251 n_advance_bytes0, n_data_bytes0);
2258 next0 = SCTP_INPUT_NEXT_DROP;
2259 error0 = SCTP_ERROR_FILTERED;
2261 else if ((is_ip4 && tm->punt_unknown4) ||
2262 (!is_ip4 && tm->punt_unknown6))
2264 next0 = SCTP_INPUT_NEXT_PUNT_PHASE;
2265 error0 = SCTP_ERROR_PUNT;
2269 next0 = SCTP_INPUT_NEXT_DROP;
2270 error0 = SCTP_ERROR_NO_LISTENER;
2272 SCTP_DBG_STATE_MACHINE ("sctp_conn == NULL, NEXT_PHASE = %s",
2273 phase_to_string (next0));
2278 b0->error = error0 ? node->errors[error0] : 0;
2280 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2282 sctp_rx_trace_t *t0 =
2283 vlib_add_trace (vm, node, b0, sizeof (*t0));
2284 sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
2286 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2287 n_left_to_next, bi0, next0);
2290 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2292 return from_frame->n_vectors;
2296 sctp4_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2297 vlib_frame_t * from_frame)
2299 return sctp46_input_dispatcher (vm, node, from_frame, 1 /* is_ip4 */ );
2303 sctp6_input_dispatcher (vlib_main_t * vm, vlib_node_runtime_t * node,
2304 vlib_frame_t * from_frame)
2306 return sctp46_input_dispatcher (vm, node, from_frame, 0 /* is_ip4 */ );
2310 VLIB_REGISTER_NODE (sctp4_input_node) =
2312 .function = sctp4_input_dispatcher,
2313 .name = "sctp4-input",
2314 /* Takes a vector of packets. */
2315 .vector_size = sizeof (u32),
2316 .n_errors = SCTP_N_ERROR,
2317 .error_strings = sctp_error_strings,
2318 .n_next_nodes = SCTP_INPUT_N_NEXT,
2321 #define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
2322 foreach_sctp4_input_next
2325 .format_buffer = format_sctp_header,
2326 .format_trace = format_sctp_rx_trace,
2330 VLIB_NODE_FUNCTION_MULTIARCH (sctp4_input_node, sctp4_input_dispatcher);
2333 VLIB_REGISTER_NODE (sctp6_input_node) =
2335 .function = sctp6_input_dispatcher,
2336 .name = "sctp6-input",
2337 /* Takes a vector of packets. */
2338 .vector_size = sizeof (u32),
2339 .n_errors = SCTP_N_ERROR,
2340 .error_strings = sctp_error_strings,
2341 .n_next_nodes = SCTP_INPUT_N_NEXT,
2344 #define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
2345 foreach_sctp6_input_next
2348 .format_buffer = format_sctp_header,
2349 .format_trace = format_sctp_rx_trace,
2353 VLIB_NODE_FUNCTION_MULTIARCH (sctp6_input_node, sctp6_input_dispatcher);
2355 vlib_node_registration_t sctp4_input_node;
2356 vlib_node_registration_t sctp6_input_node;
2359 sctp_dispatch_table_init (sctp_main_t * tm)
2362 for (i = 0; i < ARRAY_LEN (tm->dispatch_table); i++)
2363 for (j = 0; j < ARRAY_LEN (tm->dispatch_table[i]); j++)
2365 tm->dispatch_table[i][j].next = SCTP_INPUT_NEXT_DROP;
2366 tm->dispatch_table[i][j].error = SCTP_ERROR_DISPATCH;
2369 #define _(t,f,n,e) \
2371 tm->dispatch_table[SCTP_STATE_##t][f].next = (n); \
2372 tm->dispatch_table[SCTP_STATE_##t][f].error = (e); \
2376 * SCTP STATE-MACHINE states:
2378 * _(CLOSED, "CLOSED") \
2379 * _(COOKIE_WAIT, "COOKIE_WAIT") \
2380 * _(COOKIE_ECHOED, "COOKIE_ECHOED") \
2381 * _(ESTABLISHED, "ESTABLISHED") \
2382 * _(SHUTDOWN_PENDING, "SHUTDOWN_PENDING") \
2383 * _(SHUTDOWN_SENT, "SHUTDOWN_SENT") \
2384 * _(SHUTDOWN_RECEIVED, "SHUTDOWN_RECEIVED") \
2385 * _(SHUTDOWN_ACK_SENT, "SHUTDOWN_ACK_SENT")
2387 //_(CLOSED, DATA, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */
2388 _(CLOSED, INIT, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2389 _(CLOSED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2390 _(CLOSED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2391 _(CLOSED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2392 _(CLOSED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2393 _(CLOSED, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2394 _(CLOSED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2395 _(CLOSED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2396 _(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2397 _(CLOSED, COOKIE_ECHO, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2398 _(CLOSED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2399 _(CLOSED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2400 _(CLOSED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2401 _(CLOSED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2402 _(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2404 _(COOKIE_WAIT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */
2405 _(COOKIE_WAIT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2406 _(COOKIE_WAIT, INIT_ACK, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2407 _(COOKIE_WAIT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2408 _(COOKIE_WAIT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2409 _(COOKIE_WAIT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2410 _(COOKIE_WAIT, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2411 _(COOKIE_WAIT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2412 _(COOKIE_WAIT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2413 _(COOKIE_WAIT, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2414 _(COOKIE_WAIT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2415 _(COOKIE_WAIT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2416 _(COOKIE_WAIT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2417 _(COOKIE_WAIT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2418 _(COOKIE_WAIT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2419 _(COOKIE_WAIT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2422 _(COOKIE_ECHOED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE);
2423 _(COOKIE_ECHOED, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2424 _(COOKIE_ECHOED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2425 _(COOKIE_ECHOED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2426 _(COOKIE_ECHOED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2427 _(COOKIE_ECHOED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2428 _(COOKIE_ECHOED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2429 _(COOKIE_ECHOED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2430 _(COOKIE_ECHOED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2431 _(COOKIE_ECHOED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2432 _(COOKIE_ECHOED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2433 _(COOKIE_ECHOED, COOKIE_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2435 _(COOKIE_ECHOED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2436 _(COOKIE_ECHOED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2437 _(COOKIE_ECHOED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2438 _(COOKIE_ECHOED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2441 _(ESTABLISHED, DATA, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2442 _(ESTABLISHED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2443 _(ESTABLISHED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2444 _(ESTABLISHED, SACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2445 _(ESTABLISHED, HEARTBEAT, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2447 _(ESTABLISHED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE,
2449 _(ESTABLISHED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2450 _(ESTABLISHED, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2451 _(ESTABLISHED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2452 _(ESTABLISHED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2453 _(ESTABLISHED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2454 _(ESTABLISHED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2455 _(ESTABLISHED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2456 _(ESTABLISHED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2457 _(ESTABLISHED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2458 _(ESTABLISHED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2461 _(SHUTDOWN_PENDING, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2462 _(SHUTDOWN_PENDING, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2463 _(SHUTDOWN_PENDING, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2464 _(SHUTDOWN_PENDING, SACK, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2465 _(SHUTDOWN_PENDING, HEARTBEAT, SCTP_INPUT_NEXT_LISTEN_PHASE,
2467 _(SHUTDOWN_PENDING, HEARTBEAT_ACK, SCTP_INPUT_NEXT_LISTEN_PHASE,
2469 _(SHUTDOWN_PENDING, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2470 _(SHUTDOWN_PENDING, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2472 _(SHUTDOWN_PENDING, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2473 _(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2474 _(SHUTDOWN_PENDING, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2476 _(SHUTDOWN_PENDING, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2477 _(SHUTDOWN_PENDING, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2478 _(SHUTDOWN_PENDING, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2479 _(SHUTDOWN_PENDING, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2480 _(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2483 _(SHUTDOWN_SENT, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2484 _(SHUTDOWN_SENT, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2485 _(SHUTDOWN_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2486 _(SHUTDOWN_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2487 _(SHUTDOWN_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2488 _(SHUTDOWN_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2489 _(SHUTDOWN_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2490 _(SHUTDOWN_SENT, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2491 _(SHUTDOWN_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2493 _(SHUTDOWN_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2495 _(SHUTDOWN_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2496 _(SHUTDOWN_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2497 _(SHUTDOWN_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2498 _(SHUTDOWN_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2499 _(SHUTDOWN_SENT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2502 _(SHUTDOWN_RECEIVED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2503 _(SHUTDOWN_RECEIVED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2504 _(SHUTDOWN_RECEIVED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2505 _(SHUTDOWN_RECEIVED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2506 _(SHUTDOWN_RECEIVED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2507 _(SHUTDOWN_RECEIVED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2508 _(SHUTDOWN_RECEIVED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2509 _(SHUTDOWN_RECEIVED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2510 _(SHUTDOWN_RECEIVED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2512 _(SHUTDOWN_RECEIVED, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2514 _(SHUTDOWN_RECEIVED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2515 _(SHUTDOWN_RECEIVED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2516 _(SHUTDOWN_RECEIVED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2517 _(SHUTDOWN_RECEIVED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2518 _(SHUTDOWN_RECEIVED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2521 _(SHUTDOWN_ACK_SENT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2522 _(SHUTDOWN_ACK_SENT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk */
2523 _(SHUTDOWN_ACK_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2524 _(SHUTDOWN_ACK_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2525 _(SHUTDOWN_ACK_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2526 _(SHUTDOWN_ACK_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2527 _(SHUTDOWN_ACK_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2528 _(SHUTDOWN_ACK_SENT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2529 _(SHUTDOWN_ACK_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2530 _(SHUTDOWN_ACK_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2532 _(SHUTDOWN_ACK_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2533 _(SHUTDOWN_ACK_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2534 _(SHUTDOWN_ACK_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2535 _(SHUTDOWN_ACK_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2537 _(SHUTDOWN_ACK_SENT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2540 /* TODO: Handle COOKIE ECHO when a TCB Exists */
2546 sctp_input_init (vlib_main_t * vm)
2548 clib_error_t *error = 0;
2549 sctp_main_t *tm = vnet_get_sctp_main ();
2551 if ((error = vlib_call_init_function (vm, sctp_init)))
2554 /* Initialize dispatch table. */
2555 sctp_dispatch_table_init (tm);
2560 VLIB_INIT_FUNCTION (sctp_input_init);
2563 * fd.io coding-style-patch-verification: ON
2566 * eval: (c-set-style "gnu")