FD.io VPP  v19.01.3-6-g70449b9b9
Vector Packet Processing
sctp_input.c
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1 /*
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:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
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.
14  */
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>
20 #include <math.h>
21 
22 static char *sctp_error_strings[] = {
23 #define sctp_error(n,s) s,
24 #include <vnet/sctp/sctp_error.def>
25 #undef sctp_error
26 };
27 
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")
34 
35 typedef enum _sctp_established_phase_next
36 {
37 #define _(s,n) SCTP_ESTABLISHED_PHASE_NEXT_##s,
39 #undef _
42 
43 typedef enum _sctp_rcv_phase_next
44 {
45 #define _(s,n) SCTP_RCV_PHASE_NEXT_##s,
47 #undef _
50 
51 typedef enum _sctp_listen_phase_next
52 {
53 #define _(s,n) SCTP_LISTEN_PHASE_NEXT_##s,
55 #undef _
58 
59 typedef enum _sctp_shutdown_phase_next
60 {
61 #define _(s,n) SCTP_SHUTDOWN_PHASE_NEXT_##s,
63 #undef _
66 
67 /* Generic, state independent indices */
68 typedef enum _sctp_state_next
69 {
70 #define _(s,n) SCTP_NEXT_##s,
72 #undef _
75 
76 typedef enum _sctp_input_next
77 {
86 
87 char *
89 {
90  switch (phase)
91  {
93  return "SCTP_INPUT_NEXT_DROP";
95  return "SCTP_INPUT_NEXT_LISTEN_PHASE";
97  return "SCTP_INPUT_NEXT_RCV_PHASE";
99  return "SCTP_INPUT_NEXT_ESTABLISHED_PHASE";
101  return "SCTP_INPUT_NEXT_SHUTDOWN_PHASE";
103  return "SCTP_INPUT_NEXT_PUNT_PHASE";
104  }
105  return NULL;
106 }
107 
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")
115 
116 
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")
124 
125 static u8
127  sctp_header_t * sctp_hdr)
128 {
129  sctp_connection_t *sctp_conn =
131 
132  if (!sctp_conn)
133  return 1;
134 
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));
138 
139  return is_valid;
140 }
141 
142 /**
143  * Lookup transport connection
144  */
145 static sctp_connection_t *
146 sctp_lookup_connection (u32 fib_index, vlib_buffer_t * b, u8 thread_index,
147  u8 is_ip4)
148 {
150  sctp_header_t *sctp_hdr;
151  transport_connection_t *trans_conn;
152  sctp_connection_t *sctp_conn;
153  u8 is_filtered, i;
154  if (is_ip4)
155  {
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,
162  sctp_hdr->dst_port,
163  sctp_hdr->src_port,
165  thread_index, &is_filtered);
166  if (trans_conn == 0) /* Not primary connection */
167  {
168  for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
169  {
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))
176  {
177  trans_conn =
178  &tm->connections[thread_index]->sub_conn[i].connection;
179  break;
180  }
181  }
182  }
183  ASSERT (trans_conn != 0);
184  ASSERT (sctp_lookup_is_valid (trans_conn, sctp_hdr));
185  }
186  else
187  {
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,
194  sctp_hdr->dst_port,
195  sctp_hdr->src_port,
197  thread_index, &is_filtered);
198  if (trans_conn == 0) /* Not primary connection */
199  {
200  for (i = 0; i < MAX_SCTP_CONNECTIONS; i++)
201  {
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]))
214  {
215  trans_conn =
216  &tm->connections[thread_index]->sub_conn[i].connection;
217  break;
218  }
219  }
220  }
221  ASSERT (trans_conn != 0);
222  ASSERT (sctp_lookup_is_valid (trans_conn, sctp_hdr));
223  }
224  sctp_conn = sctp_get_connection_from_transport (trans_conn);
225  return sctp_conn;
226 }
227 
228 typedef struct
229 {
233 
234 #define sctp_next_output(is_ip4) (is_ip4 ? SCTP_NEXT_SCTP4_OUTPUT \
235  : SCTP_NEXT_SCTP6_OUTPUT)
236 
237 #define sctp_next_drop(is_ip4) (is_ip4 ? SCTP_NEXT_DROP4 \
238  : SCTP_NEXT_DROP6)
239 
240 void
242  sctp_connection_t * sctp_conn,
243  sctp_header_t * sctp_hdr, vlib_buffer_t * b0,
244  u8 is_ip4)
245 {
246  if (sctp_conn)
247  {
248  clib_memcpy_fast (&rx_trace->sctp_connection, sctp_conn,
249  sizeof (rx_trace->sctp_connection));
250  }
251  else
252  {
253  sctp_hdr = sctp_buffer_hdr (b0);
254  }
255  clib_memcpy_fast (&rx_trace->sctp_header, sctp_hdr,
256  sizeof (rx_trace->sctp_header));
257 }
258 
261  int is_ip4)
262 {
263  u16 sctp_implied_packet_length = 0;
264 
265  if (is_ip4)
266  sctp_implied_packet_length =
267  clib_net_to_host_u16 (ip4_hdr->length) - ip4_header_bytes (ip4_hdr);
268  else
269  sctp_implied_packet_length =
270  clib_net_to_host_u16 (ip6_hdr->payload_length) - sizeof (ip6_hdr);
271 
272  return sctp_implied_packet_length;
273 }
274 
276 sctp_is_bundling (u16 sctp_implied_length,
277  sctp_chunks_common_hdr_t * sctp_common_hdr)
278 {
279  if (sctp_implied_length !=
280  sizeof (sctp_header_t) + vnet_sctp_get_chunk_length (sctp_common_hdr))
281  return 1;
282  return 0;
283 }
284 
287  sctp_connection_t * sctp_conn, u8 idx,
288  vlib_buffer_t * b, u16 * next0)
289 {
290  sctp_operation_error_t *op_err = (sctp_operation_error_t *) sctp_hdr;
291 
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)
294  {
295  return SCTP_ERROR_INVALID_TAG;
296  }
297 
298  if (clib_net_to_host_u16 (op_err->err_causes[0].param_hdr.type) ==
300  {
301  if (sctp_conn->state != SCTP_STATE_COOKIE_ECHOED)
302  *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
303  else
304  {
305  sctp_connection_cleanup (sctp_conn);
306 
308  sub_conn[idx].connection);
309  }
310  }
311 
312  return SCTP_ERROR_NONE;
313 }
314 
317  sctp_chunks_common_hdr_t * sctp_chunk_hdr,
318  sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
319  u16 sctp_implied_length)
320 {
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;
324  u8 add_ip4 = 0;
325  u8 add_ip6 = 0;
326  char hostname[FQDN_MAX_LENGTH];
327 
328  /* Check the current state of the connection
329  *
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.
334  */
335  if (sctp_conn->state != SCTP_STATE_CLOSED)
336  { /* UNEXPECTED scenario */
337  switch (sctp_conn->state)
338  {
339  case SCTP_STATE_COOKIE_WAIT:
340  SCTP_ADV_DBG ("Received INIT chunk while in COOKIE_WAIT state");
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)
351  b0, &ip4_addr,
352  &ip6_addr);
353  else
356  &ip4_addr, &ip6_addr);
357  return SCTP_ERROR_NONE;
358  }
359  }
360 
361  if (sctp_hdr->verification_tag != 0x0)
362  return SCTP_ERROR_INVALID_TAG_FOR_INIT;
363 
364  /*
365  * It is not possible to bundle any other CHUNK with the INIT chunk
366  */
367  if (sctp_is_bundling (sctp_implied_length, &init_chunk->chunk_hdr))
368  return SCTP_ERROR_BUNDLING_VIOLATION;
369 
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);
379 
380  sctp_conn->peer_rwnd = clib_net_to_host_u32 (init_chunk->a_rwnd);
381  /*
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.
384  */
385  u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr);
386  if (length > sizeof (sctp_init_chunk_t))
387  {
388  /* There are optional parameters in the INIT chunk */
389  u16 pointer_offset = sizeof (sctp_init_chunk_t);
390  while (pointer_offset < length)
391  {
392  sctp_opt_params_hdr_t *opt_params_hdr =
393  (sctp_opt_params_hdr_t *) init_chunk + pointer_offset;
394 
395  switch (clib_net_to_host_u16 (opt_params_hdr->type))
396  {
398  {
399  sctp_ipv4_addr_param_t *ipv4 =
400  (sctp_ipv4_addr_param_t *) opt_params_hdr;
401  clib_memcpy_fast (&ip4_addr, &ipv4->address,
402  sizeof (ip4_address_t));
403 
405  &sctp_conn->sub_conn
406  [SCTP_PRIMARY_PATH_IDX].connection.
407  lcl_ip.ip4,
408  &ipv4->address) ==
409  SCTP_ERROR_NONE)
410  add_ip4 = 1;
411 
412  break;
413  }
415  {
416  sctp_ipv6_addr_param_t *ipv6 =
417  (sctp_ipv6_addr_param_t *) opt_params_hdr;
418  clib_memcpy_fast (&ip6_addr, &ipv6->address,
419  sizeof (ip6_address_t));
420 
422  &sctp_conn->sub_conn
423  [SCTP_PRIMARY_PATH_IDX].connection.
424  lcl_ip.ip6,
425  &ipv6->address) ==
426  SCTP_ERROR_NONE)
427  add_ip6 = 1;
428 
429  break;
430  }
432  {
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;
437  break;
438  }
440  {
441  sctp_hostname_param_t *hostname_addr =
442  (sctp_hostname_param_t *) opt_params_hdr;
443  clib_memcpy_fast (hostname, hostname_addr->hostname,
445  break;
446  }
448  {
449  /* TODO */
450  break;
451  }
452  }
453  pointer_offset += clib_net_to_host_u16 (opt_params_hdr->length);
454  }
455  }
456 
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;
461 }
462 
465  sctp_chunks_common_hdr_t * sctp_chunk_hdr,
466  sctp_connection_t * sctp_conn, vlib_buffer_t * b0,
467  u16 sctp_implied_length)
468 {
469  sctp_init_ack_chunk_t *init_ack_chunk =
470  (sctp_init_ack_chunk_t *) (sctp_hdr);
471 
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)
474  {
475  return SCTP_ERROR_INVALID_TAG;
476  }
477 
478  /*
479  * It is not possible to bundle any other CHUNK with the INIT_ACK chunk
480  */
481  if (sctp_is_bundling (sctp_implied_length, &init_ack_chunk->chunk_hdr))
482  return SCTP_ERROR_BUNDLING_VIOLATION;
483 
484  return SCTP_ERROR_NONE;
485 }
486 
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)
492 {
493  sctp_init_ack_chunk_t *init_ack_chunk =
494  (sctp_init_ack_chunk_t *) (sctp_hdr);
495 
496  char hostname[FQDN_MAX_LENGTH];
497 
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)
500  {
501  return SCTP_ERROR_INVALID_TAG;
502  }
503 
504  /*
505  * It is not possible to bundle any other CHUNK with the INIT chunk
506  */
507  if (sctp_is_bundling (sctp_implied_length, &init_ack_chunk->chunk_hdr))
508  return SCTP_ERROR_BUNDLING_VIOLATION;
509 
510  /* Stop the T1_INIT timer */
511  sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T1_INIT);
512 
513  sctp_calculate_rto (sctp_conn, idx);
514 
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);
524 
525  u16 length = vnet_sctp_get_chunk_length (sctp_chunk_hdr);
526 
527  if (length > sizeof (sctp_init_ack_chunk_t))
528  /*
529  * There are optional parameters in the INIT ACK chunk
530  */
531  {
532  u16 pointer_offset = sizeof (sctp_init_ack_chunk_t);
533 
534  while (pointer_offset < length)
535  {
536  sctp_opt_params_hdr_t *opt_params_hdr =
537  (sctp_opt_params_hdr_t *) ((char *) init_ack_chunk +
538  pointer_offset);
539 
540  switch (clib_net_to_host_u16 (opt_params_hdr->type))
541  {
543  {
544  sctp_ipv4_addr_param_t *ipv4 =
545  (sctp_ipv4_addr_param_t *) opt_params_hdr;
546 
548  &sctp_conn->sub_conn
549  [SCTP_PRIMARY_PATH_IDX].connection.
550  lcl_ip.ip4, &ipv4->address);
551 
552  break;
553  }
555  {
556  sctp_ipv6_addr_param_t *ipv6 =
557  (sctp_ipv6_addr_param_t *) opt_params_hdr;
558 
560  &sctp_conn->sub_conn
561  [SCTP_PRIMARY_PATH_IDX].connection.
562  lcl_ip.ip6, &ipv6->address);
563 
564  break;
565  }
567  {
568  sctp_state_cookie_param_t *state_cookie_param =
569  (sctp_state_cookie_param_t *) opt_params_hdr;
570 
571  clib_memcpy_fast (&(sctp_conn->cookie_param),
572  state_cookie_param,
573  sizeof (sctp_state_cookie_param_t));
574 
575  break;
576  }
578  {
579  sctp_hostname_param_t *hostname_addr =
580  (sctp_hostname_param_t *) opt_params_hdr;
581  clib_memcpy_fast (hostname, hostname_addr->hostname,
583  break;
584  }
586  {
587  break;
588  }
589  }
590  u16 increment = clib_net_to_host_u16 (opt_params_hdr->length);
591  /* This indicates something really bad happened */
592  if (increment == 0)
593  {
594  return SCTP_ERROR_INVALID_TAG;
595  }
596  pointer_offset += increment;
597  }
598  }
599 
600  sctp_prepare_cookie_echo_chunk (sctp_conn, idx, b0, 1);
601 
602  /* Start the T1_COOKIE timer */
603  sctp_timer_set (sctp_conn, idx,
604  SCTP_TIMER_T1_COOKIE, sctp_conn->sub_conn[idx].RTO);
605 
606  return SCTP_ERROR_NONE;
607 }
608 
609 /** Enqueue data out-of-order for delivery to application */
610 always_inline int
612  vlib_buffer_t * b, u16 data_len, u8 conn_idx)
613 {
614  int written, error = SCTP_ERROR_ENQUEUED;
615 
616  written =
618  sub_conn[conn_idx].connection, b, 0,
619  1 /* queue event */ ,
620  0);
621 
622  /* Update next_tsn_expected */
623  if (PREDICT_TRUE (written == data_len))
624  {
625  sctp_conn->next_tsn_expected += written;
626 
627  SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
628  sctp_conn->sub_conn[conn_idx].connection.c_index,
629  written, data_len);
630  }
631  /* If more data written than expected, account for out-of-order bytes. */
632  else if (written > data_len)
633  {
634  sctp_conn->next_tsn_expected += written;
635 
636  SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
637  sctp_conn->sub_conn[conn_idx].connection.c_index,
638  written, data_len);
639  }
640  else if (written > 0)
641  {
642  /* We've written something but FIFO is probably full now */
643  sctp_conn->next_tsn_expected += written;
644 
645  error = SCTP_ERROR_PARTIALLY_ENQUEUED;
646 
648  ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
649  sctp_conn->sub_conn[conn_idx].connection.c_index, written);
650  }
651  else
652  {
653  SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
654  sctp_conn->sub_conn[conn_idx].connection.c_index);
655 
656  return SCTP_ERROR_FIFO_FULL;
657  }
658 
659  /* TODO: Update out_of_order_map & SACK list */
660 
661  return error;
662 }
663 
664 /** Enqueue data for delivery to application */
665 always_inline int
667  u16 data_len, u8 conn_idx)
668 {
669  int written, error = SCTP_ERROR_ENQUEUED;
670 
671  written =
673  sub_conn[conn_idx].connection, b, 0,
674  1 /* queue event */ ,
675  1);
676 
677  /* Update next_tsn_expected */
678  if (PREDICT_TRUE (written == data_len))
679  {
680  sctp_conn->next_tsn_expected += written;
681 
682  SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] == DATA_LEN [%d]",
683  sctp_conn->sub_conn[conn_idx].connection.c_index,
684  written, data_len);
685  }
686  /* If more data written than expected, account for out-of-order bytes. */
687  else if (written > data_len)
688  {
689  sctp_conn->next_tsn_expected += written;
690 
691  SCTP_ADV_DBG ("CONN = %u, WRITTEN [%u] > DATA_LEN [%d]",
692  sctp_conn->sub_conn[conn_idx].connection.c_index,
693  written, data_len);
694  }
695  else if (written > 0)
696  {
697  /* We've written something but FIFO is probably full now */
698  sctp_conn->next_tsn_expected += written;
699 
700  error = SCTP_ERROR_PARTIALLY_ENQUEUED;
701 
703  ("CONN = %u, WRITTEN [%u] > 0 (SCTP_ERROR_PARTIALLY_ENQUEUED)",
704  sctp_conn->sub_conn[conn_idx].connection.c_index, written);
705  }
706  else
707  {
708  SCTP_ADV_DBG ("CONN = %u, WRITTEN == 0 (SCTP_ERROR_FIFO_FULL)",
709  sctp_conn->sub_conn[conn_idx].connection.c_index);
710 
711  return SCTP_ERROR_FIFO_FULL;
712  }
713 
714  return error;
715 }
716 
718 sctp_is_sack_delayable (sctp_connection_t * sctp_conn, u8 idx, u8 is_gapping)
719 {
720  if (sctp_conn->conn_config.never_delay_sack)
721  {
722  SCTP_CONN_TRACKING_DBG ("sctp_conn->conn_config.never_delay_sack = ON");
723  return 0;
724  }
725 
726  /* Section 4.4 of the RFC4960 */
727  if (sctp_conn->state == SCTP_STATE_SHUTDOWN_SENT)
728  {
729  SCTP_CONN_TRACKING_DBG ("sctp_conn->state = %s; SACK not delayable",
730  sctp_state_to_string (sctp_conn->state));
731  return 0;
732  }
733 
734  if (is_gapping)
735  {
737  ("gapping != 0: CONN_INDEX = %u, sctp_conn->ack_state = %u",
738  sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
739  return 0;
740  }
741 
742  sctp_conn->ack_state += 1;
743  if (sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS)
744  {
746  ("sctp_conn->ack_state >= MAX_ENQUEABLE_SACKS: CONN_INDEX = %u, sctp_conn->ack_state = %u",
747  sctp_conn->sub_conn[idx].connection.c_index, sctp_conn->ack_state);
748  return 0;
749  }
750 
751  return 1;
752 }
753 
754 always_inline void
756  u8 * gapping)
757 {
758  if (sctp_conn->next_tsn_expected != tsn) // It means data transmission is GAPPING
759  {
761  ("GAPPING: CONN_INDEX = %u, sctp_conn->next_tsn_expected = %u, tsn = %u, diff = %u",
762  sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.c_index,
763  sctp_conn->next_tsn_expected, tsn,
764  sctp_conn->next_tsn_expected - tsn);
765 
766  *gapping = 1;
767  }
768 }
769 
772  sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b,
773  u16 * next0)
774 {
775  u32 error = 0, n_data_bytes;
776  u8 is_gapping = 0;
777 
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_data_chunk->sctp_hdr.verification_tag)
780  {
781  *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
782  sctp_conn->sub_conn[idx].enqueue_state = SCTP_ERROR_INVALID_TAG;
783  return sctp_conn->sub_conn[idx].enqueue_state;
784  }
785 
786  vnet_buffer (b)->sctp.sid = sctp_data_chunk->stream_id;
787  vnet_buffer (b)->sctp.ssn = sctp_data_chunk->stream_seq;
788 
789  u32 tsn = clib_net_to_host_u32 (sctp_data_chunk->tsn);
790 
791  vlib_buffer_advance (b, vnet_buffer (b)->sctp.data_offset);
792  u32 chunk_len = vnet_sctp_get_chunk_length (&sctp_data_chunk->chunk_hdr) -
793  (sizeof (sctp_payload_data_chunk_t) - sizeof (sctp_header_t));
794 
795  ASSERT (vnet_buffer (b)->sctp.data_len);
796  ASSERT (chunk_len);
797 
798  /* Padding was added: see RFC 4096 section 3.3.1 */
799  if (vnet_buffer (b)->sctp.data_len > chunk_len)
800  {
801  /* Let's change the data_len to the right amount calculated here now.
802  * We cannot do that in the generic sctp46_input_dispatcher node since
803  * that is common to all CHUNKS handling.
804  */
805  vnet_buffer (b)->sctp.data_len = chunk_len;
806  /* We need to change b->current_length so that downstream calls to
807  * session_enqueue_stream_connection (called by sctp_session_enqueue_data)
808  * push the correct amount of data to be enqueued.
809  */
810  b->current_length = chunk_len;
811  }
812  n_data_bytes = vnet_buffer (b)->sctp.data_len;
813 
814  sctp_is_connection_gapping (sctp_conn, tsn, &is_gapping);
815 
816  sctp_conn->last_rcvd_tsn = tsn;
817 
818  SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
819 
820  u8 bbit = vnet_sctp_get_bbit (&sctp_data_chunk->chunk_hdr);
821  u8 ebit = vnet_sctp_get_ebit (&sctp_data_chunk->chunk_hdr);
822 
823  if (bbit == 1 && ebit == 1) /* Unfragmented message */
824  {
825  /* In order data, enqueue. Fifo figures out by itself if any out-of-order
826  * segments can be enqueued after fifo tail offset changes. */
827  if (PREDICT_FALSE (is_gapping == 1))
828  error =
829  sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
830  else
831  error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
832  }
833  else if (bbit == 1 && ebit == 0) /* First piece of a fragmented user message */
834  {
835  error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
836  }
837  else if (bbit == 0 && ebit == 1) /* Last piece of a fragmented user message */
838  {
839  if (PREDICT_FALSE (is_gapping == 1))
840  error =
841  sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
842  else
843  error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
844  }
845  else /* Middle piece of a fragmented user message */
846  {
847  if (PREDICT_FALSE (is_gapping == 1))
848  error =
849  sctp_session_enqueue_data_ooo (sctp_conn, b, n_data_bytes, idx);
850  else
851  error = sctp_session_enqueue_data (sctp_conn, b, n_data_bytes, idx);
852  }
853  sctp_conn->last_rcvd_tsn = tsn;
854 
855  SCTP_ADV_DBG ("POINTER_WITH_DATA = %p", b->data);
856 
857  if (!sctp_is_sack_delayable (sctp_conn, idx, is_gapping))
858  {
859  *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
860  sctp_prepare_sack_chunk (sctp_conn, idx, b);
861  }
862  else
863  *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
864 
865  sctp_conn->sub_conn[idx].enqueue_state = error;
866 
867  return error;
868 }
869 
872  sctp_chunks_common_hdr_t * sctp_chunk_hdr,
873  sctp_connection_t * sctp_conn, u8 idx,
874  vlib_buffer_t * b0, u16 * next0)
875 {
876  u64 now = sctp_time_now ();
877 
878  sctp_cookie_echo_chunk_t *cookie_echo =
879  (sctp_cookie_echo_chunk_t *) sctp_hdr;
880 
881  /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
882  if (sctp_conn->local_tag != sctp_hdr->verification_tag)
883  {
884  *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
885  return SCTP_ERROR_INVALID_TAG;
886  }
887 
888  sctp_calculate_rto (sctp_conn, idx);
889 
890  u64 creation_time =
891  clib_net_to_host_u64 (cookie_echo->cookie.creation_time);
892  u64 cookie_lifespan =
893  clib_net_to_host_u32 (cookie_echo->cookie.cookie_lifespan);
894 
895  if (now > creation_time + cookie_lifespan)
896  {
897  SCTP_DBG ("now (%u) > creation_time (%u) + cookie_lifespan (%u)",
898  now, creation_time, cookie_lifespan);
899  return SCTP_ERROR_COOKIE_ECHO_VIOLATION;
900  }
901 
902  sctp_prepare_cookie_ack_chunk (sctp_conn, idx, b0);
903 
904  /* Change state */
905  sctp_conn->state = SCTP_STATE_ESTABLISHED;
906  sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_STATE_UP;
907  *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
908 
909  sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
910  sctp_conn->sub_conn[idx].RTO);
911 
912  stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
913 
914  return SCTP_ERROR_NONE;
915 
916 }
917 
920  sctp_chunks_common_hdr_t * sctp_chunk_hdr,
921  sctp_connection_t * sctp_conn, u8 idx,
922  vlib_buffer_t * b0, u16 * next0)
923 {
924  /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
925  if (sctp_conn->local_tag != sctp_hdr->verification_tag)
926  {
927  *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
928  return SCTP_ERROR_INVALID_TAG;
929  }
930 
931  sctp_calculate_rto (sctp_conn, idx);
932 
933  sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T1_COOKIE);
934  /* Change state */
935  sctp_conn->state = SCTP_STATE_ESTABLISHED;
936  sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_STATE_UP;
937 
938  *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
939 
940  sctp_timer_set (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
941  sctp_conn->sub_conn[idx].RTO);
942 
943  stream_session_accept_notify (&sctp_conn->sub_conn[idx].connection);
944 
945  return SCTP_ERROR_NONE;
946 
947 }
948 
951  vlib_frame_t * from_frame, int is_ip4)
952 {
954 
955  u32 n_left_from, next_index, *from, *to_next;
956  u32 my_thread_index = vm->thread_index;
957 
958  from = vlib_frame_vector_args (from_frame);
959  n_left_from = from_frame->n_vectors;
960 
961  next_index = node->cached_next_index;
962 
963  while (n_left_from > 0)
964  {
965  u32 n_left_to_next;
966 
967  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
968 
969  while (n_left_from > 0 && n_left_to_next > 0)
970  {
971  u32 bi0;
972  vlib_buffer_t *b0;
973  sctp_header_t *sctp_hdr = 0;
974  sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
975  ip4_header_t *ip4_hdr = 0;
976  ip6_header_t *ip6_hdr = 0;
977  sctp_connection_t *sctp_conn, *new_sctp_conn;
978  u16 sctp_implied_length = 0;
979  u16 error0 = SCTP_ERROR_NONE, next0 = sctp_next_drop (is_ip4);
980  u8 idx;
981 
982  bi0 = from[0];
983  to_next[0] = bi0;
984  from += 1;
985  to_next += 1;
986  n_left_from -= 1;
987  n_left_to_next -= 1;
988 
989  b0 = vlib_get_buffer (vm, bi0);
990 
991  /* If we are in SCTP_COOKIE_WAIT_STATE then the connection
992  * will come from the half-open connections pool.
993  */
994  sctp_conn =
996  sctp.connection_index);
997 
998  if (PREDICT_FALSE (sctp_conn == 0))
999  {
1000  SCTP_ADV_DBG
1001  ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1002  error0 = SCTP_ERROR_INVALID_CONNECTION;
1003  goto drop;
1004  }
1005  if (is_ip4)
1006  {
1007  ip4_hdr = vlib_buffer_get_current (b0);
1008  sctp_hdr = ip4_next_header (ip4_hdr);
1009  idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
1010  }
1011  else
1012  {
1013  ip6_hdr = vlib_buffer_get_current (b0);
1014  sctp_hdr = ip6_next_header (ip6_hdr);
1015  idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
1016  }
1017 
1018  sctp_conn->sub_conn[idx].subconn_idx = idx;
1019  sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1020 
1021  sctp_chunk_hdr =
1022  (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
1023 
1024  sctp_implied_length =
1025  sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1026 
1027  u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
1028 
1029  switch (chunk_type)
1030  {
1031  case INIT_ACK:
1032  error0 =
1033  sctp_is_valid_init_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1034  b0, sctp_implied_length);
1035 
1036  if (error0 == SCTP_ERROR_NONE)
1037  {
1038  pool_get (tm->connections[my_thread_index], new_sctp_conn);
1039  clib_memcpy_fast (new_sctp_conn, sctp_conn,
1040  sizeof (*new_sctp_conn));
1041  new_sctp_conn->sub_conn[idx].c_c_index =
1042  new_sctp_conn - tm->connections[my_thread_index];
1043  new_sctp_conn->sub_conn[idx].c_thread_index =
1044  my_thread_index;
1045  new_sctp_conn->sub_conn[idx].PMTU =
1046  sctp_conn->sub_conn[idx].PMTU;
1047  new_sctp_conn->sub_conn[idx].subconn_idx = idx;
1048 
1049  if (sctp_half_open_connection_cleanup (sctp_conn))
1050  {
1051  SCTP_DBG
1052  ("Cannot cleanup half-open connection; not the owning thread");
1053  }
1054 
1055  sctp_connection_timers_init (new_sctp_conn);
1056 
1057  sctp_init_cwnd (new_sctp_conn);
1058 
1059  error0 =
1060  sctp_handle_init_ack (sctp_hdr, sctp_chunk_hdr,
1061  new_sctp_conn, idx, b0,
1062  sctp_implied_length);
1063 
1065  (&new_sctp_conn->sub_conn[idx].connection, 0))
1066  {
1067  SCTP_DBG
1068  ("conn_index = %u: session_stream_connect_notify error; cleaning up connection",
1069  new_sctp_conn->sub_conn[idx].connection.c_index);
1070  sctp_connection_cleanup (new_sctp_conn);
1071  goto drop;
1072  }
1073  next0 = sctp_next_output (is_ip4);
1074  }
1075  break;
1076 
1077  case OPERATION_ERROR:
1078  error0 =
1079  sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0,
1080  &next0);
1081  break;
1082 
1083  /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1084  * are handled by the input-dispatcher function using the table-lookup
1085  * hence we should never get to the "default" case below.
1086  */
1087  default:
1088  error0 = SCTP_ERROR_UNKNOWN_CHUNK;
1089  next0 = sctp_next_drop (is_ip4);
1090  goto drop;
1091  }
1092 
1093  if (error0 != SCTP_ERROR_NONE)
1094  {
1095  clib_warning ("error while parsing chunk");
1096  sctp_connection_cleanup (sctp_conn);
1097  next0 = sctp_next_drop (is_ip4);
1098  goto drop;
1099  }
1100 
1101  drop:
1102  b0->error = node->errors[error0];
1103  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1104  {
1105  sctp_rx_trace_t *t0 =
1106  vlib_add_trace (vm, node, b0, sizeof (*t0));
1107  sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
1108  }
1109 
1110  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1111  n_left_to_next, bi0, next0);
1112  }
1113 
1114  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1115  }
1116  return from_frame->n_vectors;
1117 }
1118 
1119 static uword
1121  vlib_frame_t * from_frame)
1122 {
1123  return sctp46_rcv_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1124 }
1125 
1126 static uword
1128  vlib_frame_t * from_frame)
1129 {
1130  return sctp46_rcv_phase_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1131 }
1132 
1133 u8 *
1134 format_sctp_rx_trace_short (u8 * s, va_list * args)
1135 {
1136  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1137  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1138  sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
1139 
1140  s = format (s, "%d -> %d (%U)",
1141  clib_net_to_host_u16 (t->sctp_header.src_port),
1142  clib_net_to_host_u16 (t->sctp_header.dst_port),
1144 
1145  return s;
1146 }
1147 
1148 /* *INDENT-OFF* */
1150 {
1151  .function = sctp4_rcv_phase,
1152  .name = "sctp4-rcv",
1153  /* Takes a vector of packets. */
1154  .vector_size = sizeof (u32),
1155  .n_errors = SCTP_N_ERROR,
1156  .error_strings = sctp_error_strings,
1157  .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1158  .next_nodes =
1159  {
1160 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1162 #undef _
1163  },
1164  .format_trace = format_sctp_rx_trace_short,
1165 };
1166 /* *INDENT-ON* */
1167 
1169 
1170 /* *INDENT-OFF* */
1172 {
1173  .function = sctp6_rcv_phase,
1174  .name = "sctp6-rcv",
1175  /* Takes a vector of packets. */
1176  .vector_size = sizeof (u32),
1177  .n_errors = SCTP_N_ERROR,
1178  .error_strings = sctp_error_strings,
1179  .n_next_nodes = SCTP_RCV_PHASE_N_NEXT,
1180  .next_nodes =
1181  {
1182 #define _(s,n) [SCTP_RCV_PHASE_NEXT_##s] = n,
1184 #undef _
1185  },
1186  .format_trace = format_sctp_rx_trace_short,
1187 };
1188 /* *INDENT-ON* */
1189 
1191 
1194 
1197  sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1198  sctp_connection_t * sctp_conn, u8 idx,
1199  vlib_buffer_t * b0, u16 sctp_implied_length,
1200  u16 * next0)
1201 {
1202  sctp_shutdown_association_chunk_t *shutdown_chunk =
1203  (sctp_shutdown_association_chunk_t *) (sctp_hdr);
1204 
1205  /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1206  if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1207  {
1208  *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1209  return SCTP_ERROR_INVALID_TAG;
1210  }
1211 
1212  /*
1213  * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1214  */
1215  if (sctp_is_bundling (sctp_implied_length, &shutdown_chunk->chunk_hdr))
1216  return SCTP_ERROR_BUNDLING_VIOLATION;
1217 
1218  switch (sctp_conn->state)
1219  {
1220  case SCTP_STATE_ESTABLISHED:
1221  if (sctp_check_outstanding_data_chunks (sctp_conn) == 0)
1222  sctp_conn->state = SCTP_STATE_SHUTDOWN_RECEIVED;
1223  sctp_send_shutdown_ack (sctp_conn, idx, b0);
1224  break;
1225 
1226  case SCTP_STATE_SHUTDOWN_SENT:
1227  sctp_send_shutdown_ack (sctp_conn, idx, b0);
1228  break;
1229  }
1230 
1231  *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
1232 
1233  return SCTP_ERROR_NONE;
1234 }
1235 
1238  sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1239  sctp_connection_t * sctp_conn, u8 idx,
1240  vlib_buffer_t * b0, u16 sctp_implied_length,
1241  u16 * next0)
1242 {
1243  sctp_shutdown_ack_chunk_t *shutdown_ack_chunk =
1244  (sctp_shutdown_ack_chunk_t *) (sctp_hdr);
1245 
1246  /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1247  if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1248  {
1249  *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1250  return SCTP_ERROR_INVALID_TAG;
1251  }
1252 
1253  /*
1254  * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1255  */
1256  if (sctp_is_bundling (sctp_implied_length, &shutdown_ack_chunk->chunk_hdr))
1257  return SCTP_ERROR_BUNDLING_VIOLATION;
1258 
1259  /* Whether we are in SCTP_STATE_SHUTDOWN_SENT or SCTP_STATE_SHUTDOWN_ACK_SENT
1260  * the reception of a SHUTDOWN_ACK chunk leads to the same actions:
1261  * - STOP T2_SHUTDOWN timer
1262  * - SEND SHUTDOWN_COMPLETE chunk
1263  */
1264  sctp_timer_reset (sctp_conn, SCTP_PRIMARY_PATH_IDX, SCTP_TIMER_T2_SHUTDOWN);
1265 
1266  sctp_send_shutdown_complete (sctp_conn, idx, b0);
1267 
1268  *next0 = sctp_next_output (sctp_conn->sub_conn[idx].c_is_ip4);
1269 
1270  return SCTP_ERROR_NONE;
1271 }
1272 
1275  sctp_chunks_common_hdr_t * sctp_chunk_hdr,
1276  sctp_connection_t * sctp_conn, u8 idx,
1277  vlib_buffer_t * b0, u16 sctp_implied_length,
1278  u16 * next0)
1279 {
1280  sctp_shutdown_complete_chunk_t *shutdown_complete =
1281  (sctp_shutdown_complete_chunk_t *) (sctp_hdr);
1282 
1283  /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1284  if (sctp_conn->local_tag != sctp_hdr->verification_tag)
1285  {
1286  *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1287  return SCTP_ERROR_INVALID_TAG;
1288  }
1289 
1290  /*
1291  * It is not possible to bundle any other CHUNK with the SHUTDOWN chunk
1292  */
1293  if (sctp_is_bundling (sctp_implied_length, &shutdown_complete->chunk_hdr))
1294  return SCTP_ERROR_BUNDLING_VIOLATION;
1295 
1296  sctp_timer_reset (sctp_conn, idx, SCTP_TIMER_T2_SHUTDOWN);
1297 
1298  session_transport_closing_notify (&sctp_conn->sub_conn[idx].connection);
1299 
1300  sctp_conn->state = SCTP_STATE_CLOSED;
1301 
1302  *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1303 
1304  return SCTP_ERROR_NONE;
1305 }
1306 
1309  vlib_node_runtime_t * node,
1310  vlib_frame_t * from_frame, int is_ip4)
1311 {
1312  u32 n_left_from, next_index, *from, *to_next;
1313  u32 my_thread_index = vm->thread_index;
1314 
1315  from = vlib_frame_vector_args (from_frame);
1316  n_left_from = from_frame->n_vectors;
1317 
1318  next_index = node->cached_next_index;
1319 
1320  while (n_left_from > 0)
1321  {
1322  u32 n_left_to_next;
1323 
1324  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1325 
1326  while (n_left_from > 0 && n_left_to_next > 0)
1327  {
1328  u32 bi0;
1329  vlib_buffer_t *b0;
1330  sctp_rx_trace_t *sctp_trace;
1331  sctp_header_t *sctp_hdr = 0;
1332  sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1333  ip4_header_t *ip4_hdr = 0;
1334  ip6_header_t *ip6_hdr = 0;
1335  sctp_connection_t *sctp_conn;
1336  u16 sctp_implied_length = 0;
1337  u16 error0 = SCTP_ERROR_NONE, next0 = SCTP_RCV_PHASE_N_NEXT;
1338  u8 idx = 0;
1339 
1340  bi0 = from[0];
1341  to_next[0] = bi0;
1342  from += 1;
1343  to_next += 1;
1344  n_left_from -= 1;
1345  n_left_to_next -= 1;
1346 
1347  b0 = vlib_get_buffer (vm, bi0);
1348  sctp_conn =
1349  sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1350  my_thread_index);
1351 
1352  if (PREDICT_FALSE (sctp_conn == 0))
1353  {
1354  SCTP_DBG
1355  ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1356  error0 = SCTP_ERROR_INVALID_CONNECTION;
1357  goto drop;
1358  }
1359 
1360  if (is_ip4)
1361  {
1362  ip4_hdr = vlib_buffer_get_current (b0);
1363  sctp_hdr = ip4_next_header (ip4_hdr);
1364  idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
1365  }
1366  else
1367  {
1368  ip6_hdr = vlib_buffer_get_current (b0);
1369  sctp_hdr = ip6_next_header (ip6_hdr);
1370  idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
1371  }
1372 
1373  sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1374  sctp_chunk_hdr = &full_hdr->common_hdr;
1375 
1376  sctp_implied_length =
1377  sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1378 
1379  u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
1380  switch (chunk_type)
1381  {
1382  case SHUTDOWN:
1383  error0 =
1384  sctp_handle_shutdown (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1385  idx, b0, sctp_implied_length, &next0);
1386  break;
1387 
1388  case SHUTDOWN_ACK:
1389  error0 =
1390  sctp_handle_shutdown_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1391  idx, b0, sctp_implied_length,
1392  &next0);
1393  break;
1394 
1395  case SHUTDOWN_COMPLETE:
1396  error0 =
1397  sctp_handle_shutdown_complete (sctp_hdr, sctp_chunk_hdr,
1398  sctp_conn, idx, b0,
1399  sctp_implied_length, &next0);
1400 
1401  sctp_connection_cleanup (sctp_conn);
1402  break;
1403 
1404  /*
1405  * DATA chunks can still be transmitted/received in the SHUTDOWN-PENDING
1406  * and SHUTDOWN-SENT states (as per RFC4960 Section 6)
1407  */
1408  case DATA:
1409  error0 =
1411  sctp_conn, idx, b0, &next0);
1412  break;
1413 
1414  case OPERATION_ERROR:
1415  error0 =
1416  sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0,
1417  &next0);
1418  break;
1419 
1420  case COOKIE_ECHO: /* Cookie Received While Shutting Down */
1421  sctp_prepare_operation_error (sctp_conn, idx, b0,
1423  error0 = SCTP_ERROR_NONE;
1424  next0 = sctp_next_output (is_ip4);
1425  break;
1426  /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1427  * are handled by the input-dispatcher function using the table-lookup
1428  * hence we should never get to the "default" case below.
1429  */
1430  default:
1431  error0 = SCTP_ERROR_UNKNOWN_CHUNK;
1432  next0 = sctp_next_drop (is_ip4);
1433  goto drop;
1434  }
1435 
1436  if (error0 != SCTP_ERROR_NONE)
1437  {
1438  clib_warning ("error while parsing chunk");
1439  sctp_connection_cleanup (sctp_conn);
1440  next0 = sctp_next_drop (is_ip4);
1441  goto drop;
1442  }
1443 
1444  drop:
1445  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1446  {
1447  sctp_trace =
1448  vlib_add_trace (vm, node, b0, sizeof (*sctp_trace));
1449 
1450  if (sctp_hdr != NULL)
1451  clib_memcpy_fast (&sctp_trace->sctp_header, sctp_hdr,
1452  sizeof (sctp_trace->sctp_header));
1453 
1454  if (sctp_conn != NULL)
1455  clib_memcpy_fast (&sctp_trace->sctp_connection, sctp_conn,
1456  sizeof (sctp_trace->sctp_connection));
1457  }
1458 
1459  b0->error = node->errors[error0];
1460 
1461  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1462  n_left_to_next, bi0, next0);
1463  }
1464 
1465  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1466  }
1467 
1468  return from_frame->n_vectors;
1469 
1470 }
1471 
1472 static uword
1474  vlib_frame_t * from_frame)
1475 {
1476  return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1477 }
1478 
1479 static uword
1481  vlib_frame_t * from_frame)
1482 {
1483  return sctp46_shutdown_phase_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1484 }
1485 
1486 /* *INDENT-OFF* */
1488 {
1489  .function = sctp4_shutdown_phase,
1490  .name = "sctp4-shutdown",
1491  /* Takes a vector of packets. */
1492  .vector_size = sizeof (u32),
1493  .n_errors = SCTP_N_ERROR,
1494  .error_strings = sctp_error_strings,
1495  .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1496  .next_nodes =
1497  {
1498 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1500 #undef _
1501  },
1502  .format_trace = format_sctp_rx_trace_short,
1503 };
1504 /* *INDENT-ON* */
1505 
1508 
1509 /* *INDENT-OFF* */
1511 {
1512  .function = sctp6_shutdown_phase,
1513  .name = "sctp6-shutdown",
1514  /* Takes a vector of packets. */
1515  .vector_size = sizeof (u32),
1516  .n_errors = SCTP_N_ERROR,
1517  .error_strings = sctp_error_strings,
1518  .n_next_nodes = SCTP_SHUTDOWN_PHASE_N_NEXT,
1519  .next_nodes =
1520  {
1521 #define _(s,n) [SCTP_SHUTDOWN_PHASE_NEXT_##s] = n,
1523 #undef _
1524  },
1525  .format_trace = format_sctp_rx_trace_short,
1526 };
1527 /* *INDENT-ON* */
1528 
1531 
1534 
1537 
1540  sctp_connection_t * sctp_conn, u8 idx, vlib_buffer_t * b0,
1541  u16 * next0)
1542 {
1543 
1544  /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1545  if (sctp_conn->local_tag != sack_chunk->sctp_hdr.verification_tag)
1546  {
1547  *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1548  return SCTP_ERROR_INVALID_TAG;
1549  }
1550 
1551  sctp_conn->sub_conn[idx].state = SCTP_SUBCONN_SACK_RECEIVED;
1552 
1553  sctp_conn->sub_conn[idx].last_seen = sctp_time_now ();
1554 
1555  /* Section 7.2.2; point (2) */
1556  if (sctp_conn->sub_conn[idx].cwnd > sctp_conn->sub_conn[idx].ssthresh)
1557  sctp_conn->sub_conn[idx].partially_acked_bytes =
1558  sctp_conn->next_tsn - sack_chunk->cumulative_tsn_ack;
1559 
1560  /* Section 7.2.2; point (5) */
1561  if (sctp_conn->next_tsn - sack_chunk->cumulative_tsn_ack == 0)
1562  sctp_conn->sub_conn[idx].partially_acked_bytes = 0;
1563 
1564  sctp_conn->last_unacked_tsn = sack_chunk->cumulative_tsn_ack;
1565 
1566  sctp_calculate_rto (sctp_conn, idx);
1567 
1568  sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T3_RXTX,
1569  sctp_conn->sub_conn[idx].RTO);
1570 
1571  sctp_conn->sub_conn[idx].RTO_pending = 0;
1572 
1573  *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1574 
1575  return SCTP_ERROR_NONE;
1576 }
1577 
1580  sctp_connection_t * sctp_conn, u8 idx,
1581  vlib_buffer_t * b0, u16 * next0)
1582 {
1583  /* Check that the LOCALLY generated tag is being used by the REMOTE peer as the verification tag */
1584  if (sctp_conn->local_tag != sctp_hb_chunk->sctp_hdr.verification_tag)
1585  {
1586  *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1587  return SCTP_ERROR_INVALID_TAG;
1588  }
1589 
1590  sctp_prepare_heartbeat_ack_chunk (sctp_conn, idx, b0);
1591 
1592  *next0 = sctp_next_output (sctp_conn->sub_conn[idx].connection.is_ip4);
1593 
1594  return SCTP_ERROR_NONE;
1595 }
1596 
1599  sctp_connection_t * sctp_conn, u8 idx,
1600  vlib_buffer_t * b0, u16 * next0)
1601 {
1602  sctp_conn->sub_conn[idx].last_seen = sctp_time_now ();
1603 
1604  sctp_conn->sub_conn[idx].unacknowledged_hb -= 1;
1605 
1606  sctp_timer_update (sctp_conn, idx, SCTP_TIMER_T4_HEARTBEAT,
1607  sctp_conn->sub_conn[idx].RTO);
1608 
1609  *next0 = sctp_next_drop (sctp_conn->sub_conn[idx].c_is_ip4);
1610 
1611  return SCTP_ERROR_NONE;
1612 }
1613 
1614 always_inline void
1615 sctp_node_inc_counter (vlib_main_t * vm, u32 sctp4_node, u32 sctp6_node,
1616  u8 is_ip4, u8 evt, u8 val)
1617 {
1618  if (PREDICT_TRUE (!val))
1619  return;
1620 
1621  if (is_ip4)
1622  vlib_node_increment_counter (vm, sctp4_node, evt, val);
1623  else
1624  vlib_node_increment_counter (vm, sctp6_node, evt, val);
1625 }
1626 
1629  vlib_node_runtime_t * node,
1630  vlib_frame_t * from_frame, int is_ip4)
1631 {
1632  u32 n_left_from, next_index, *from, *to_next;
1633  u32 my_thread_index = vm->thread_index;
1634 
1635  from = vlib_frame_vector_args (from_frame);
1636  n_left_from = from_frame->n_vectors;
1637 
1638  next_index = node->cached_next_index;
1639 
1640  while (n_left_from > 0)
1641  {
1642  u32 n_left_to_next;
1643 
1644  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1645 
1646  while (n_left_from > 0 && n_left_to_next > 0)
1647  {
1648  u32 bi0;
1649  vlib_buffer_t *b0;
1650  sctp_header_t *sctp_hdr = 0;
1651  ip4_header_t *ip4_hdr;
1652  ip6_header_t *ip6_hdr;
1653  sctp_connection_t *child_conn;
1654  sctp_connection_t *sctp_listener;
1655  u16 next0 = sctp_next_drop (is_ip4), error0 = SCTP_ERROR_ENQUEUED;
1656 
1657  bi0 = from[0];
1658  to_next[0] = bi0;
1659  from += 1;
1660  to_next += 1;
1661  n_left_from -= 1;
1662  n_left_to_next -= 1;
1663 
1664  b0 = vlib_get_buffer (vm, bi0);
1665  sctp_listener =
1666  sctp_listener_get (vnet_buffer (b0)->sctp.connection_index);
1667 
1668  if (is_ip4)
1669  {
1670  ip4_hdr = vlib_buffer_get_current (b0);
1671  sctp_hdr = ip4_next_header (ip4_hdr);
1672  }
1673  else
1674  {
1675  ip6_hdr = vlib_buffer_get_current (b0);
1676  sctp_hdr = ip6_next_header (ip6_hdr);
1677  }
1678 
1679  child_conn =
1680  sctp_lookup_connection (sctp_listener->sub_conn
1681  [SCTP_PRIMARY_PATH_IDX].c_fib_index, b0,
1682  my_thread_index, is_ip4);
1683 
1684  if (PREDICT_FALSE (child_conn->state != SCTP_STATE_CLOSED))
1685  {
1686  SCTP_DBG
1687  ("conn_index = %u: child_conn->state != SCTP_STATE_CLOSED.... STATE=%s",
1688  child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].
1689  connection.c_index,
1690  sctp_state_to_string (child_conn->state));
1691  error0 = SCTP_ERROR_CREATE_EXISTS;
1692  goto drop;
1693  }
1694 
1695  /* Create child session and send SYN-ACK */
1696  child_conn = sctp_connection_new (my_thread_index);
1697  child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].subconn_idx =
1699  child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_lcl_port =
1700  sctp_hdr->dst_port;
1701  child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_rmt_port =
1702  sctp_hdr->src_port;
1703  child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_is_ip4 = is_ip4;
1704  child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.proto =
1705  sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.proto;
1706  child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].PMTU =
1707  sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX].PMTU;
1708  child_conn->state = SCTP_STATE_CLOSED;
1709  child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].connection.fib_index =
1710  sctp_listener->sub_conn[SCTP_PRIMARY_PATH_IDX].
1711  connection.fib_index;
1712 
1713  if (is_ip4)
1714  {
1715  child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_lcl_ip4.as_u32 =
1716  ip4_hdr->dst_address.as_u32;
1717  child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].c_rmt_ip4.as_u32 =
1718  ip4_hdr->src_address.as_u32;
1719  }
1720  else
1721  {
1722  clib_memcpy_fast (&child_conn->
1723  sub_conn[SCTP_PRIMARY_PATH_IDX].c_lcl_ip6,
1724  &ip6_hdr->dst_address,
1725  sizeof (ip6_address_t));
1726  clib_memcpy_fast (&child_conn->
1727  sub_conn[SCTP_PRIMARY_PATH_IDX].c_rmt_ip6,
1728  &ip6_hdr->src_address,
1729  sizeof (ip6_address_t));
1730  }
1731 
1732  sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1733  sctp_chunks_common_hdr_t *sctp_chunk_hdr = &full_hdr->common_hdr;
1734 
1735  u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
1736  if (chunk_type != INIT && chunk_type != DATA
1737  && chunk_type != OPERATION_ERROR)
1738  {
1739  SCTP_DBG
1740  ("conn_index = %u: chunk_type != INIT... chunk_type=%s",
1741  child_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].
1742  connection.c_index, sctp_chunk_to_string (chunk_type));
1743 
1744  error0 = SCTP_ERROR_UNKNOWN_CHUNK;
1745  next0 = sctp_next_drop (is_ip4);
1746  goto drop;
1747  }
1748 
1749  u16 sctp_implied_length =
1750  sctp_calculate_implied_length (ip4_hdr, ip6_hdr, is_ip4);
1751 
1752  switch (chunk_type)
1753  {
1754  case INIT:
1755  sctp_connection_timers_init (child_conn);
1756 
1757  sctp_init_snd_vars (child_conn);
1758 
1759  sctp_init_cwnd (child_conn);
1760 
1761  error0 =
1762  sctp_handle_init (sctp_hdr, sctp_chunk_hdr, child_conn, b0,
1763  sctp_implied_length);
1764 
1765  if (error0 == SCTP_ERROR_NONE)
1766  {
1768  (&child_conn->
1769  sub_conn[SCTP_PRIMARY_PATH_IDX].connection,
1770  sctp_listener->
1771  sub_conn[SCTP_PRIMARY_PATH_IDX].c_s_index, 0))
1772  {
1773  clib_warning ("session accept fail");
1774  sctp_connection_cleanup (child_conn);
1775  error0 = SCTP_ERROR_CREATE_SESSION_FAIL;
1776  goto drop;
1777  }
1778  next0 = sctp_next_output (is_ip4);
1779  }
1780  break;
1781 
1782  /* Reception of a DATA chunk whilst in the CLOSED state is called
1783  * "Out of the Blue" packet and handling of the chunk needs special treatment
1784  * as per RFC4960 section 8.4
1785  */
1786  case DATA:
1787  break;
1788 
1789  case OPERATION_ERROR:
1790  error0 =
1791  sctp_handle_operation_err (sctp_hdr, child_conn,
1792  SCTP_PRIMARY_PATH_IDX, b0, &next0);
1793  break;
1794  }
1795 
1796  drop:
1797  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1798  {
1799  sctp_rx_trace_t *t0 =
1800  vlib_add_trace (vm, node, b0, sizeof (*t0));
1801  clib_memcpy_fast (&t0->sctp_header, sctp_hdr,
1802  sizeof (t0->sctp_header));
1803  clib_memcpy_fast (&t0->sctp_connection, sctp_listener,
1804  sizeof (t0->sctp_connection));
1805  }
1806 
1807  b0->error = node->errors[error0];
1808 
1809  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1810  n_left_to_next, bi0, next0);
1811  }
1812  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1813 
1814  }
1815  return from_frame->n_vectors;
1816 }
1817 
1818 static uword
1820  vlib_frame_t * from_frame)
1821 {
1822  return sctp46_listen_process_inline (vm, node, from_frame, 1 /* is_ip4 */ );
1823 }
1824 
1825 static uword
1827  vlib_frame_t * from_frame)
1828 {
1829  return sctp46_listen_process_inline (vm, node, from_frame, 0 /* is_ip4 */ );
1830 }
1831 
1834  vlib_frame_t * from_frame, int is_ip4)
1835 {
1836  u32 n_left_from, next_index, *from, *to_next;
1837  u32 my_thread_index = vm->thread_index, errors = 0;
1838 
1839  from = vlib_frame_vector_args (from_frame);
1840  n_left_from = from_frame->n_vectors;
1841 
1842  next_index = node->cached_next_index;
1843 
1844  while (n_left_from > 0)
1845  {
1846  u32 n_left_to_next;
1847 
1848  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
1849 
1850  while (n_left_from > 0 && n_left_to_next > 0)
1851  {
1852  u32 bi0;
1853  vlib_buffer_t *b0;
1854  sctp_header_t *sctp_hdr = 0;
1855  sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
1856  ip4_header_t *ip4_hdr = 0;
1857  ip6_header_t *ip6_hdr = 0;
1858  sctp_connection_t *sctp_conn;
1859  u16 error0 = SCTP_ERROR_ENQUEUED, next0 =
1861  u8 idx;
1862 
1863  bi0 = from[0];
1864  to_next[0] = bi0;
1865  from += 1;
1866  to_next += 1;
1867  n_left_from -= 1;
1868  n_left_to_next -= 1;
1869 
1870  b0 = vlib_get_buffer (vm, bi0);
1871  sctp_conn =
1872  sctp_connection_get (vnet_buffer (b0)->sctp.connection_index,
1873  my_thread_index);
1874 
1875  if (PREDICT_FALSE (sctp_conn == 0))
1876  {
1877  SCTP_DBG
1878  ("sctp_conn == NULL; return SCTP_ERROR_INVALID_CONNECTION");
1879  error0 = SCTP_ERROR_INVALID_CONNECTION;
1880  goto done;
1881  }
1882  if (is_ip4)
1883  {
1884  ip4_hdr = vlib_buffer_get_current (b0);
1885  sctp_hdr = ip4_next_header (ip4_hdr);
1886  idx = sctp_sub_conn_id_via_ip4h (sctp_conn, ip4_hdr);
1887  }
1888  else
1889  {
1890  ip6_hdr = vlib_buffer_get_current (b0);
1891  sctp_hdr = ip6_next_header (ip6_hdr);
1892  idx = sctp_sub_conn_id_via_ip6h (sctp_conn, ip6_hdr);
1893  }
1894 
1895  sctp_conn->sub_conn[idx].subconn_idx = idx;
1896 
1897  sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
1898  sctp_chunk_hdr =
1899  (sctp_chunks_common_hdr_t *) (&full_hdr->common_hdr);
1900 
1901  u8 chunk_type = vnet_sctp_get_chunk_type (&full_hdr->common_hdr);
1902 
1903  switch (chunk_type)
1904  {
1905  case COOKIE_ECHO:
1906  error0 =
1907  sctp_handle_cookie_echo (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1908  idx, b0, &next0);
1909  break;
1910 
1911  case COOKIE_ACK:
1912  error0 =
1913  sctp_handle_cookie_ack (sctp_hdr, sctp_chunk_hdr, sctp_conn,
1914  idx, b0, &next0);
1915  break;
1916 
1917  case SACK:
1918  error0 =
1920  sctp_conn, idx, b0, &next0);
1921  break;
1922 
1923  case HEARTBEAT:
1924  error0 =
1926  sctp_conn, idx, b0, &next0);
1927  break;
1928 
1929  case HEARTBEAT_ACK:
1930  error0 =
1932  sctp_conn, idx, b0, &next0);
1933  break;
1934 
1935  case DATA:
1936  error0 =
1938  sctp_conn, idx, b0, &next0);
1939  break;
1940 
1941  case OPERATION_ERROR:
1942  error0 =
1943  sctp_handle_operation_err (sctp_hdr, sctp_conn, idx, b0,
1944  &next0);
1945  break;
1946 
1947  /* All UNEXPECTED scenarios (wrong chunk received per state-machine)
1948  * are handled by the input-dispatcher function using the table-lookup
1949  * hence we should never get to the "default" case below.
1950  */
1951  default:
1952  error0 = SCTP_ERROR_UNKNOWN_CHUNK;
1953  next0 = sctp_next_drop (is_ip4);
1954  goto done;
1955  }
1956 
1957  done:
1958  b0->error = node->errors[error0];
1959  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
1960  {
1961  sctp_rx_trace_t *t0 =
1962  vlib_add_trace (vm, node, b0, sizeof (*t0));
1963  sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
1964  }
1965 
1966  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
1967  n_left_to_next, bi0, next0);
1968  }
1969 
1970  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
1971  }
1972 
1974  my_thread_index);
1975 
1978  SCTP_ERROR_EVENT_FIFO_FULL, errors);
1979  sctp_flush_frame_to_output (vm, my_thread_index, is_ip4);
1980 
1981  return from_frame->n_vectors;
1982 }
1983 
1984 static uword
1986  vlib_frame_t * from_frame)
1987 {
1988  return sctp46_established_phase_inline (vm, node, from_frame,
1989  1 /* is_ip4 */ );
1990 }
1991 
1992 static uword
1994  vlib_frame_t * from_frame)
1995 {
1996  return sctp46_established_phase_inline (vm, node, from_frame,
1997  0 /* is_ip4 */ );
1998 }
1999 
2000 u8 *
2001 format_sctp_rx_trace (u8 * s, va_list * args)
2002 {
2003  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
2004  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
2005  sctp_rx_trace_t *t = va_arg (*args, sctp_rx_trace_t *);
2006  u32 indent = format_get_indent (s);
2007 
2008  s = format (s, "%U\n%U%U",
2009  format_sctp_header, &t->sctp_header, 128,
2010  format_white_space, indent,
2012 
2013  return s;
2014 }
2015 
2016 /* *INDENT-OFF* */
2018 {
2019  .function = sctp4_listen_phase,
2020  .name = "sctp4-listen",
2021  /* Takes a vector of packets. */
2022  .vector_size = sizeof (u32),
2023  .n_errors = SCTP_N_ERROR,
2024  .error_strings = sctp_error_strings,
2025  .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
2026  .next_nodes =
2027  {
2028 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
2030 #undef _
2031  },
2032  .format_trace = format_sctp_rx_trace_short,
2033 };
2034 /* *INDENT-ON* */
2035 
2037 
2038 /* *INDENT-OFF* */
2040 {
2041  .function = sctp6_listen_phase,
2042  .name = "sctp6-listen",
2043  /* Takes a vector of packets. */
2044  .vector_size = sizeof (u32),
2045  .n_errors = SCTP_N_ERROR,
2046  .error_strings = sctp_error_strings,
2047  .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
2048  .next_nodes =
2049  {
2050 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
2052 #undef _
2053  },
2054  .format_trace = format_sctp_rx_trace_short,
2055 };
2056 /* *INDENT-ON* */
2057 
2059 
2060 /* *INDENT-OFF* */
2062 {
2063  .function = sctp4_established_phase,
2064  .name = "sctp4-established",
2065  /* Takes a vector of packets. */
2066  .vector_size = sizeof (u32),
2067  .n_errors = SCTP_N_ERROR,
2068  .error_strings = sctp_error_strings,
2069  .n_next_nodes = SCTP_ESTABLISHED_PHASE_N_NEXT,
2070  .next_nodes =
2071  {
2072 #define _(s,n) [SCTP_ESTABLISHED_PHASE_NEXT_##s] = n,
2074 #undef _
2075  },
2076  .format_trace = format_sctp_rx_trace_short,
2077 };
2078 /* *INDENT-ON* */
2079 
2082 
2083 /* *INDENT-OFF* */
2085 {
2086  .function = sctp6_established_phase,
2087  .name = "sctp6-established",
2088  /* Takes a vector of packets. */
2089  .vector_size = sizeof (u32),
2090  .n_errors = SCTP_N_ERROR,
2091  .error_strings = sctp_error_strings,
2092  .n_next_nodes = SCTP_LISTEN_PHASE_N_NEXT,
2093  .next_nodes =
2094  {
2095 #define _(s,n) [SCTP_LISTEN_PHASE_NEXT_##s] = n,
2097 #undef _
2098  },
2099  .format_trace = format_sctp_rx_trace_short,
2100 };
2101 /* *INDENT-ON* */
2102 
2105 
2106 /*
2107  * This is the function executed first for the SCTP graph.
2108  * It takes care of doing the initial message parsing and
2109  * dispatch to the specialized function.
2110  */
2113  vlib_frame_t * from_frame, int is_ip4)
2114 {
2115  u32 n_left_from, next_index, *from, *to_next;
2116  u32 my_thread_index = vm->thread_index;
2117  u8 result;
2119 
2120  from = vlib_frame_vector_args (from_frame);
2121  n_left_from = from_frame->n_vectors;
2122  next_index = node->cached_next_index;
2123  sctp_set_time_now (my_thread_index);
2124 
2125  while (n_left_from > 0)
2126  {
2127  u32 n_left_to_next;
2128 
2129  vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
2130 
2131  while (n_left_from > 0 && n_left_to_next > 0)
2132  {
2133  int n_advance_bytes0, n_data_bytes0;
2134  u32 bi0, fib_index0;
2135  vlib_buffer_t *b0;
2136  sctp_header_t *sctp_hdr = 0;
2137  sctp_chunks_common_hdr_t *sctp_chunk_hdr = 0;
2138  sctp_connection_t *sctp_conn;
2139  transport_connection_t *trans_conn;
2140  ip4_header_t *ip4_hdr;
2141  ip6_header_t *ip6_hdr;
2142  u32 error0 = SCTP_ERROR_NO_LISTENER, next0 = SCTP_INPUT_NEXT_DROP;
2143 
2144  bi0 = from[0];
2145  to_next[0] = bi0;
2146  from += 1;
2147  to_next += 1;
2148  n_left_from -= 1;
2149  n_left_to_next -= 1;
2150 
2151  b0 = vlib_get_buffer (vm, bi0);
2152  vnet_buffer (b0)->sctp.flags = 0;
2153  fib_index0 = vnet_buffer (b0)->ip.fib_index;
2154 
2155  /* Checksum computed by ipx_local no need to compute again */
2156 
2157  if (is_ip4)
2158  {
2159  ip4_hdr = vlib_buffer_get_current (b0);
2160  sctp_hdr = ip4_next_header (ip4_hdr);
2161 
2162  sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
2163  sctp_chunk_hdr = &full_hdr->common_hdr;
2164 
2165  n_advance_bytes0 =
2166  (ip4_header_bytes (ip4_hdr) +
2167  sizeof (sctp_payload_data_chunk_t));
2168  n_data_bytes0 =
2169  clib_net_to_host_u16 (ip4_hdr->length) - n_advance_bytes0;
2170 
2171  trans_conn = session_lookup_connection_wt4 (fib_index0,
2172  &ip4_hdr->dst_address,
2173  &ip4_hdr->src_address,
2174  sctp_hdr->dst_port,
2175  sctp_hdr->src_port,
2177  my_thread_index,
2178  &result);
2179  }
2180  else
2181  {
2182  ip6_hdr = vlib_buffer_get_current (b0);
2183  sctp_hdr = ip6_next_header (ip6_hdr);
2184 
2185  sctp_full_hdr_t *full_hdr = (sctp_full_hdr_t *) sctp_hdr;
2186  sctp_chunk_hdr = &full_hdr->common_hdr;
2187 
2188  n_advance_bytes0 = sctp_header_bytes ();
2189  n_data_bytes0 =
2190  clib_net_to_host_u16 (ip6_hdr->payload_length) -
2191  n_advance_bytes0;
2192  n_advance_bytes0 += sizeof (ip6_hdr[0]);
2193 
2194  trans_conn = session_lookup_connection_wt6 (fib_index0,
2195  &ip6_hdr->dst_address,
2196  &ip6_hdr->src_address,
2197  sctp_hdr->dst_port,
2198  sctp_hdr->src_port,
2200  my_thread_index,
2201  &result);
2202  }
2203 
2204  /* Length check */
2205  if (PREDICT_FALSE (n_advance_bytes0 < 0))
2206  {
2207  error0 = SCTP_ERROR_LENGTH;
2208  goto done;
2209  }
2210 
2211  sctp_conn = sctp_get_connection_from_transport (trans_conn);
2212  vnet_sctp_common_hdr_params_net_to_host (sctp_chunk_hdr);
2213 
2214  u8 chunk_type = vnet_sctp_get_chunk_type (sctp_chunk_hdr);
2215  if (chunk_type >= UNKNOWN)
2216  {
2217  clib_warning
2218  ("Received an unrecognized chunk; sending back OPERATION_ERROR chunk");
2219 
2222 
2223  error0 = SCTP_ERROR_UNKNOWN_CHUNK;
2224  next0 = sctp_next_output (is_ip4);
2225  goto done;
2226  }
2227 
2228  vnet_buffer (b0)->sctp.hdr_offset =
2229  (u8 *) sctp_hdr - (u8 *) vlib_buffer_get_current (b0);
2230 
2231  /* Session exists */
2232  if (PREDICT_TRUE (0 != sctp_conn))
2233  {
2234  /* Save connection index */
2235  vnet_buffer (b0)->sctp.connection_index = trans_conn->c_index;
2236  vnet_buffer (b0)->sctp.data_offset = n_advance_bytes0;
2237  vnet_buffer (b0)->sctp.data_len = n_data_bytes0;
2238 
2239  next0 = tm->dispatch_table[sctp_conn->state][chunk_type].next;
2240  error0 = tm->dispatch_table[sctp_conn->state][chunk_type].error;
2241 
2243  ("S_INDEX = %u, C_INDEX = %u, TRANS_CONN = %p, SCTP_CONN = %p, CURRENT_CONNECTION_STATE = %s,"
2244  "CHUNK_TYPE_RECEIVED = %s " "NEXT_PHASE = %s",
2245  sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].
2246  connection.s_index,
2247  sctp_conn->sub_conn[SCTP_PRIMARY_PATH_IDX].
2248  connection.c_index, trans_conn, sctp_conn,
2249  sctp_state_to_string (sctp_conn->state),
2250  sctp_chunk_to_string (chunk_type), phase_to_string (next0));
2251 
2252  if (chunk_type == DATA)
2253  SCTP_ADV_DBG ("n_advance_bytes0 = %u, n_data_bytes0 = %u",
2254  n_advance_bytes0, n_data_bytes0);
2255 
2256  }
2257  else
2258  {
2259  if (result)
2260  {
2261  next0 = SCTP_INPUT_NEXT_DROP;
2262  error0 = SCTP_ERROR_NONE + result;
2263  }
2264  else if ((is_ip4 && tm->punt_unknown4) ||
2265  (!is_ip4 && tm->punt_unknown6))
2266  {
2268  error0 = SCTP_ERROR_PUNT;
2269  }
2270  else
2271  {
2272  next0 = SCTP_INPUT_NEXT_DROP;
2273  error0 = SCTP_ERROR_NO_LISTENER;
2274  }
2275  SCTP_DBG_STATE_MACHINE ("sctp_conn == NULL, NEXT_PHASE = %s",
2276  phase_to_string (next0));
2277  sctp_conn = 0;
2278  }
2279 
2280  done:
2281  b0->error = error0 ? node->errors[error0] : 0;
2282 
2283  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
2284  {
2285  sctp_rx_trace_t *t0 =
2286  vlib_add_trace (vm, node, b0, sizeof (*t0));
2287  sctp_set_rx_trace_data (t0, sctp_conn, sctp_hdr, b0, is_ip4);
2288  }
2289  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
2290  n_left_to_next, bi0, next0);
2291  }
2292 
2293  vlib_put_next_frame (vm, node, next_index, n_left_to_next);
2294  }
2295  return from_frame->n_vectors;
2296 }
2297 
2298 static uword
2300  vlib_frame_t * from_frame)
2301 {
2302  return sctp46_input_dispatcher (vm, node, from_frame, 1 /* is_ip4 */ );
2303 }
2304 
2305 static uword
2307  vlib_frame_t * from_frame)
2308 {
2309  return sctp46_input_dispatcher (vm, node, from_frame, 0 /* is_ip4 */ );
2310 }
2311 
2312 /* *INDENT-OFF* */
2314 {
2315  .function = sctp4_input_dispatcher,
2316  .name = "sctp4-input",
2317  /* Takes a vector of packets. */
2318  .vector_size = sizeof (u32),
2319  .n_errors = SCTP_N_ERROR,
2320  .error_strings = sctp_error_strings,
2321  .n_next_nodes = SCTP_INPUT_N_NEXT,
2322  .next_nodes =
2323  {
2324 #define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
2326 #undef _
2327  },
2328  .format_buffer = format_sctp_header,
2329  .format_trace = format_sctp_rx_trace,
2330 };
2331 /* *INDENT-ON* */
2332 
2334 
2335 /* *INDENT-OFF* */
2337 {
2338  .function = sctp6_input_dispatcher,
2339  .name = "sctp6-input",
2340  /* Takes a vector of packets. */
2341  .vector_size = sizeof (u32),
2342  .n_errors = SCTP_N_ERROR,
2343  .error_strings = sctp_error_strings,
2344  .n_next_nodes = SCTP_INPUT_N_NEXT,
2345  .next_nodes =
2346  {
2347 #define _(s,n) [SCTP_INPUT_NEXT_##s] = n,
2349 #undef _
2350  },
2351  .format_buffer = format_sctp_header,
2352  .format_trace = format_sctp_rx_trace,
2353 };
2354 /* *INDENT-ON* */
2355 
2357 
2360 
2361 static void
2363 {
2364  int i, j;
2365  for (i = 0; i < ARRAY_LEN (tm->dispatch_table); i++)
2366  for (j = 0; j < ARRAY_LEN (tm->dispatch_table[i]); j++)
2367  {
2368  tm->dispatch_table[i][j].next = SCTP_INPUT_NEXT_DROP;
2369  tm->dispatch_table[i][j].error = SCTP_ERROR_DISPATCH;
2370  }
2371 
2372 #define _(t,f,n,e) \
2373 do { \
2374  tm->dispatch_table[SCTP_STATE_##t][f].next = (n); \
2375  tm->dispatch_table[SCTP_STATE_##t][f].error = (e); \
2376 } while (0)
2377 
2378  /*
2379  * SCTP STATE-MACHINE states:
2380  *
2381  * _(CLOSED, "CLOSED") \
2382  * _(COOKIE_WAIT, "COOKIE_WAIT") \
2383  * _(COOKIE_ECHOED, "COOKIE_ECHOED") \
2384  * _(ESTABLISHED, "ESTABLISHED") \
2385  * _(SHUTDOWN_PENDING, "SHUTDOWN_PENDING") \
2386  * _(SHUTDOWN_SENT, "SHUTDOWN_SENT") \
2387  * _(SHUTDOWN_RECEIVED, "SHUTDOWN_RECEIVED") \
2388  * _(SHUTDOWN_ACK_SENT, "SHUTDOWN_ACK_SENT")
2389  */
2390  //_(CLOSED, DATA, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */
2391  _(CLOSED, INIT, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2392  _(CLOSED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2393  _(CLOSED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2394  _(CLOSED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2395  _(CLOSED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2396  _(CLOSED, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2397  _(CLOSED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2398  _(CLOSED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2399  _(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2400  _(CLOSED, COOKIE_ECHO, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2401  _(CLOSED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2402  _(CLOSED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2403  _(CLOSED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2404  _(CLOSED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2405  _(CLOSED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2406 
2407  _(COOKIE_WAIT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE); /* UNEXPECTED DATA chunk which requires special handling */
2408  _(COOKIE_WAIT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2409  _(COOKIE_WAIT, INIT_ACK, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2410  _(COOKIE_WAIT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2411  _(COOKIE_WAIT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2412  _(COOKIE_WAIT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2413  _(COOKIE_WAIT, ABORT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE);
2414  _(COOKIE_WAIT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2415  _(COOKIE_WAIT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2416  _(COOKIE_WAIT, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2417  _(COOKIE_WAIT, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2418  _(COOKIE_WAIT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2419  _(COOKIE_WAIT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2420  _(COOKIE_WAIT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2421  _(COOKIE_WAIT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2423  SCTP_ERROR_NONE);
2424 
2425  _(COOKIE_ECHOED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_NONE);
2426  _(COOKIE_ECHOED, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk which requires special handling */
2427  _(COOKIE_ECHOED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2428  _(COOKIE_ECHOED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2429  _(COOKIE_ECHOED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2430  _(COOKIE_ECHOED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2431  _(COOKIE_ECHOED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2432  _(COOKIE_ECHOED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2433  _(COOKIE_ECHOED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2434  _(COOKIE_ECHOED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2435  _(COOKIE_ECHOED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2437  SCTP_ERROR_NONE);
2438  _(COOKIE_ECHOED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2439  _(COOKIE_ECHOED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2440  _(COOKIE_ECHOED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2442  SCTP_ERROR_NONE);
2443 
2444  _(ESTABLISHED, DATA, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2445  _(ESTABLISHED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2446  _(ESTABLISHED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2447  _(ESTABLISHED, SACK, SCTP_INPUT_NEXT_ESTABLISHED_PHASE, SCTP_ERROR_NONE);
2449  SCTP_ERROR_NONE);
2451  SCTP_ERROR_NONE);
2452  _(ESTABLISHED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2453  _(ESTABLISHED, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2454  _(ESTABLISHED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2455  _(ESTABLISHED, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2456  _(ESTABLISHED, COOKIE_ECHO, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_COOKIE_ECHO_VIOLATION); /* UNEXPECTED COOKIE_ECHO chunk */
2457  _(ESTABLISHED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2458  _(ESTABLISHED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2459  _(ESTABLISHED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2460  _(ESTABLISHED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2462  SCTP_ERROR_NONE);
2463 
2464  _(SHUTDOWN_PENDING, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2465  _(SHUTDOWN_PENDING, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2466  _(SHUTDOWN_PENDING, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2467  _(SHUTDOWN_PENDING, SACK, SCTP_INPUT_NEXT_LISTEN_PHASE, SCTP_ERROR_NONE);
2468  _(SHUTDOWN_PENDING, HEARTBEAT, SCTP_INPUT_NEXT_LISTEN_PHASE,
2469  SCTP_ERROR_NONE);
2470  _(SHUTDOWN_PENDING, HEARTBEAT_ACK, SCTP_INPUT_NEXT_LISTEN_PHASE,
2471  SCTP_ERROR_NONE);
2472  _(SHUTDOWN_PENDING, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2473  _(SHUTDOWN_PENDING, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2474  SCTP_ERROR_NONE);
2475  _(SHUTDOWN_PENDING, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2476  _(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_OPERATION_ERROR_VIOLATION); /* UNEXPECTED OPERATION_ERROR chunk */
2477  _(SHUTDOWN_PENDING, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2478  SCTP_ERROR_NONE);
2479  _(SHUTDOWN_PENDING, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2480  _(SHUTDOWN_PENDING, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2481  _(SHUTDOWN_PENDING, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2482  _(SHUTDOWN_PENDING, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2483  _(SHUTDOWN_PENDING, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2484  SCTP_ERROR_NONE);
2485 
2486  _(SHUTDOWN_SENT, DATA, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2487  _(SHUTDOWN_SENT, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2488  _(SHUTDOWN_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2489  _(SHUTDOWN_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED SACK chunk */
2490  _(SHUTDOWN_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2491  _(SHUTDOWN_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2492  _(SHUTDOWN_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2493  _(SHUTDOWN_SENT, SHUTDOWN, SCTP_INPUT_NEXT_SHUTDOWN_PHASE, SCTP_ERROR_NONE);
2494  _(SHUTDOWN_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2495  SCTP_ERROR_NONE);
2496  _(SHUTDOWN_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2497  SCTP_ERROR_NONE);
2498  _(SHUTDOWN_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2499  _(SHUTDOWN_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2500  _(SHUTDOWN_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2501  _(SHUTDOWN_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2503  SCTP_ERROR_NONE);
2504 
2505  _(SHUTDOWN_RECEIVED, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2506  _(SHUTDOWN_RECEIVED, INIT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_INIT_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2507  _(SHUTDOWN_RECEIVED, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2508  _(SHUTDOWN_RECEIVED, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2509  _(SHUTDOWN_RECEIVED, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2510  _(SHUTDOWN_RECEIVED, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2511  _(SHUTDOWN_RECEIVED, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2512  _(SHUTDOWN_RECEIVED, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2513  _(SHUTDOWN_RECEIVED, SHUTDOWN_ACK, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2514  SCTP_ERROR_NONE);
2515  _(SHUTDOWN_RECEIVED, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2516  SCTP_ERROR_NONE);
2517  _(SHUTDOWN_RECEIVED, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2518  _(SHUTDOWN_RECEIVED, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2519  _(SHUTDOWN_RECEIVED, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2520  _(SHUTDOWN_RECEIVED, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_COMPLETE_VIOLATION); /* UNEXPECTED SHUTDOWN_COMPLETE chunk */
2521  _(SHUTDOWN_RECEIVED, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2522  SCTP_ERROR_NONE);
2523 
2524  _(SHUTDOWN_ACK_SENT, DATA, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_DATA_CHUNK_VIOLATION); /* UNEXPECTED DATA chunk */
2525  _(SHUTDOWN_ACK_SENT, INIT, SCTP_INPUT_NEXT_RCV_PHASE, SCTP_ERROR_NONE); /* UNEXPECTED INIT chunk */
2526  _(SHUTDOWN_ACK_SENT, INIT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED INIT_ACK chunk */
2527  _(SHUTDOWN_ACK_SENT, SACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SACK_CHUNK_VIOLATION); /* UNEXPECTED INIT chunk */
2528  _(SHUTDOWN_ACK_SENT, HEARTBEAT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT chunk */
2529  _(SHUTDOWN_ACK_SENT, HEARTBEAT_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_HEARTBEAT_ACK_CHUNK_VIOLATION); /* UNEXPECTED HEARTBEAT_ACK chunk */
2530  _(SHUTDOWN_ACK_SENT, ABORT, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ABORT_CHUNK_VIOLATION); /* UNEXPECTED ABORT chunk */
2531  _(SHUTDOWN_ACK_SENT, SHUTDOWN, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN chunk */
2532  _(SHUTDOWN_ACK_SENT, SHUTDOWN_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_SHUTDOWN_ACK_CHUNK_VIOLATION); /* UNEXPECTED SHUTDOWN_ACK chunk */
2533  _(SHUTDOWN_ACK_SENT, COOKIE_ECHO, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2534  SCTP_ERROR_NONE);
2535  _(SHUTDOWN_ACK_SENT, COOKIE_ACK, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ACK_DUP); /* UNEXPECTED COOKIE_ACK chunk */
2536  _(SHUTDOWN_ACK_SENT, ECNE, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_ECNE_VIOLATION); /* UNEXPECTED ECNE chunk */
2537  _(SHUTDOWN_ACK_SENT, CWR, SCTP_INPUT_NEXT_DROP, SCTP_ERROR_CWR_VIOLATION); /* UNEXPECTED CWR chunk */
2538  _(SHUTDOWN_ACK_SENT, SHUTDOWN_COMPLETE, SCTP_INPUT_NEXT_SHUTDOWN_PHASE,
2539  SCTP_ERROR_NONE);
2540  _(SHUTDOWN_ACK_SENT, OPERATION_ERROR, SCTP_INPUT_NEXT_LISTEN_PHASE,
2541  SCTP_ERROR_NONE);
2542 
2543  /* TODO: Handle COOKIE ECHO when a TCB Exists */
2544 
2545 #undef _
2546 }
2547 
2548 clib_error_t *
2550 {
2551  clib_error_t *error = 0;
2553 
2554  if ((error = vlib_call_init_function (vm, sctp_init)))
2555  return error;
2556 
2557  /* Initialize dispatch table. */
2559 
2560  return error;
2561 }
2562 
2564 
2565 /*
2566  * fd.io coding-style-patch-verification: ON
2567  *
2568  * Local Variables:
2569  * eval: (c-set-style "gnu")
2570  * End:
2571  */
void sctp_flush_frame_to_output(vlib_main_t *vm, u8 thread_index, u8 is_ip4)
Flush tx frame populated by retransmits and timer pops.
Definition: sctp_output.c:54
static u16 sctp_handle_shutdown_complete(sctp_header_t *sctp_hdr, sctp_chunks_common_hdr_t *sctp_chunk_hdr, sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b0, u16 sctp_implied_length, u16 *next0)
Definition: sctp_input.c:1274
u16 sctp_check_outstanding_data_chunks(sctp_connection_t *sctp_conn)
Definition: sctp.c:558
static sctp_connection_t * sctp_lookup_connection(u32 fib_index, vlib_buffer_t *b, u8 thread_index, u8 is_ip4)
Lookup transport connection.
Definition: sctp_input.c:146
struct _sctp_main sctp_main_t
static void sctp_timer_set(sctp_connection_t *tc, u8 conn_idx, u8 timer_id, u32 interval)
Definition: sctp.h:594
void sctp_connection_timers_init(sctp_connection_t *sctp_conn)
Initialize all connection timers as invalid.
Definition: sctp.c:140
int stream_session_accept_notify(transport_connection_t *tc)
Definition: session.c:771
static void sctp_is_connection_gapping(sctp_connection_t *sctp_conn, u32 tsn, u8 *gapping)
Definition: sctp_input.c:755
static u8 sctp_sub_conn_id_via_ip4h(sctp_connection_t *sctp_conn, ip4_header_t *ip4h)
Definition: sctp.h:807
#define SCTP_DBG(_fmt, _args...)
Definition: sctp_debug.h:38
void sctp_init_snd_vars(sctp_connection_t *sctp_conn)
Initialize connection send variables.
Definition: sctp.c:255
#define CLIB_UNUSED(x)
Definition: clib.h:82
static u16 sctp_handle_init(sctp_header_t *sctp_hdr, sctp_chunks_common_hdr_t *sctp_chunk_hdr, sctp_connection_t *sctp_conn, vlib_buffer_t *b0, u16 sctp_implied_length)
Definition: sctp_input.c:316
static u16 sctp_is_valid_init_ack(sctp_header_t *sctp_hdr, sctp_chunks_common_hdr_t *sctp_chunk_hdr, sctp_connection_t *sctp_conn, vlib_buffer_t *b0, u16 sctp_implied_length)
Definition: sctp_input.c:464
ip4_address_t src_address
Definition: ip4_packet.h:170
transport_connection_t * session_lookup_connection_wt6(u32 fib_index, ip6_address_t *lcl, ip6_address_t *rmt, u16 lcl_port, u16 rmt_port, u8 proto, u32 thread_index, u8 *result)
Lookup connection with ip6 and transport layer information.
static u8 sctp_lookup_is_valid(transport_connection_t *trans_conn, sctp_header_t *sctp_hdr)
Definition: sctp_input.c:126
struct _transport_connection transport_connection_t
enum _sctp_listen_phase_next sctp_listen_phase_next_t
static uword sctp46_established_phase_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame, int is_ip4)
Definition: sctp_input.c:1833
#define COOKIE_RECEIVED_WHILE_SHUTTING_DOWN
Definition: sctp_packet.h:1007
#define PREDICT_TRUE(x)
Definition: clib.h:112
u64 as_u64[2]
Definition: ip6_packet.h:51
unsigned long u64
Definition: types.h:89
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
sctp_header_t sctp_header
Definition: sctp_input.c:230
#define NULL
Definition: clib.h:58
sctp_chunks_common_hdr_t chunk_hdr
Definition: sctp_packet.h:591
static u8 vnet_sctp_get_ebit(sctp_chunks_common_hdr_t *h)
Definition: sctp_packet.h:329
static u64 sctp_time_now(void)
Definition: sctp.h:669
enum _sctp_rcv_phase_next sctp_rcv_phase_next_t
u32 thread_index
Definition: main.h:179
#define SCTP_ADV_DBG(_fmt, _args...)
Definition: sctp_debug.h:45
static u16 sctp_handle_cookie_echo(sctp_header_t *sctp_hdr, sctp_chunks_common_hdr_t *sctp_chunk_hdr, sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b0, u16 *next0)
Definition: sctp_input.c:871
sctp_chunks_common_hdr_t chunk_hdr
Definition: sctp_packet.h:412
int i
#define SCTP_HOSTNAME_ADDRESS_TYPE
Definition: sctp_packet.h:784
void sctp_prepare_cookie_ack_chunk(sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b)
Definition: sctp_output.c:528
static u32 format_get_indent(u8 *s)
Definition: format.h:72
void sctp_prepare_abort_for_collision(sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b, ip4_address_t *ip4_addr, ip6_address_t *ip6_addr)
Convert buffer to ABORT.
Definition: sctp_output.c:690
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
static u16 sctp_handle_shutdown_ack(sctp_header_t *sctp_hdr, sctp_chunks_common_hdr_t *sctp_chunk_hdr, sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b0, u16 sctp_implied_length, u16 *next0)
Definition: sctp_input.c:1237
static void sctp_calculate_rto(sctp_connection_t *sctp_conn, u8 conn_idx)
Definition: sctp.h:677
int session_enqueue_stream_connection(transport_connection_t *tc, vlib_buffer_t *b, u32 offset, u8 queue_event, u8 is_in_order)
Definition: session.c:392
vlib_error_t * errors
Vector of errors for this node.
Definition: node.h:493
static char * sctp_error_strings[]
Definition: sctp_input.c:22
#define pool_get(P, E)
Allocate an object E from a pool P (unspecified alignment).
Definition: pool.h:236
ip6_address_t src_address
Definition: ip6_packet.h:378
unsigned char u8
Definition: types.h:56
static sctp_main_t * vnet_get_sctp_main()
Definition: sctp.h:542
vlib_node_registration_t sctp4_established_phase_node
(constructor) VLIB_REGISTER_NODE (sctp4_established_phase_node)
Definition: sctp_input.c:1535
static void sctp_dispatch_table_init(sctp_main_t *tm)
Definition: sctp_input.c:2362
enum _sctp_input_next sctp_input_next_t
sctp_chunks_common_hdr_t chunk_hdr
Definition: sctp_packet.h:1411
enum _sctp_shutdown_phase_next sctp_shutdown_phase_next_t
void session_transport_closing_notify(transport_connection_t *tc)
Notification from transport that connection is being closed.
Definition: session.c:794
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:163
static void sctp_init_cwnd(sctp_connection_t *sctp_conn)
Definition: sctp.h:901
#define always_inline
Definition: clib.h:98
ip4_address_t dst_address
Definition: ip4_packet.h:170
void sctp_prepare_initack_chunk_for_collision(sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b, ip4_address_t *ip4_addr, ip6_address_t *ip6_addr)
Convert buffer to INIT-ACK.
Definition: sctp_output.c:731
u8 * format_white_space(u8 *s, va_list *va)
Definition: std-formats.c:113
transport_connection_t * session_lookup_connection_wt4(u32 fib_index, ip4_address_t *lcl, ip4_address_t *rmt, u16 lcl_port, u16 rmt_port, u8 proto, u32 thread_index, u8 *result)
Lookup connection with ip4 and transport layer information.
#define FQDN_MAX_LENGTH
Definition: sctp_packet.h:914
vlib_node_registration_t sctp6_input_node
(constructor) VLIB_REGISTER_NODE (sctp6_input_node)
Definition: sctp_input.c:2336
#define STALE_COOKIE_ERROR
Definition: sctp_packet.h:1000
#define UNRECOGNIZED_CHUNK_TYPE
Definition: sctp_packet.h:1003
vlib_node_registration_t sctp4_input_node
(constructor) VLIB_REGISTER_NODE (sctp4_input_node)
Definition: sctp_input.c:2313
static void vnet_sctp_common_hdr_params_net_to_host(sctp_chunks_common_hdr_t *h)
Definition: sctp_packet.h:290
static void * ip4_next_header(ip4_header_t *i)
Definition: ip4_packet.h:241
void sctp_prepare_sack_chunk(sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b)
Convert buffer to SACK.
Definition: sctp_output.c:1125
static int sctp_half_open_connection_cleanup(sctp_connection_t *tc)
Try to cleanup half-open connection.
Definition: sctp.h:632
unsigned int u32
Definition: types.h:88
sctp_connection_t * sctp_connection_new(u8 thread_index)
Definition: sctp.c:426
#define vlib_call_init_function(vm, x)
Definition: init.h:260
#define SCTP_STATE_COOKIE_TYPE
Definition: sctp_packet.h:780
static uword sctp46_input_dispatcher(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame, int is_ip4)
Definition: sctp_input.c:2112
#define SCTP_UNRECOGNIZED_TYPE
Definition: sctp_packet.h:781
vlib_node_registration_t sctp4_shutdown_phase_node
(constructor) VLIB_REGISTER_NODE (sctp4_shutdown_phase_node)
Definition: sctp_input.c:1192
static u16 sctp_handle_shutdown(sctp_header_t *sctp_hdr, sctp_chunks_common_hdr_t *sctp_chunk_hdr, sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b0, u16 sctp_implied_length, u16 *next0)
Definition: sctp_input.c:1196
ip6_address_t address
Definition: sctp_packet.h:842
void sctp_prepare_heartbeat_ack_chunk(sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b)
Convert buffer to HEARTBEAT_ACK.
Definition: sctp_output.c:1163
static void sctp_timer_reset(sctp_connection_t *tc, u8 conn_idx, u8 timer_id)
Definition: sctp.h:609
static u16 sctp_calculate_implied_length(ip4_header_t *ip4_hdr, ip6_header_t *ip6_hdr, int is_ip4)
Definition: sctp_input.c:260
static sctp_connection_t * sctp_get_connection_from_transport(transport_connection_t *tconn)
Definition: sctp.h:650
u16 current_length
Nbytes between current data and the end of this buffer.
Definition: buffer.h:114
VLIB_NODE_FUNCTION_MULTIARCH(sctp4_rcv_phase_node, sctp4_rcv_phase)
sctp_init_chunk_t sctp_init_ack_chunk_t
Definition: sctp_packet.h:690
vlib_node_registration_t sctp6_listen_phase_node
(constructor) VLIB_REGISTER_NODE (sctp6_listen_phase_node)
Definition: sctp_input.c:1533
unsigned short u16
Definition: types.h:57
vlib_node_registration_t sctp4_rcv_phase_node
(constructor) VLIB_REGISTER_NODE (sctp4_rcv_phase_node)
Definition: sctp_input.c:1149
vlib_node_registration_t sctp6_shutdown_phase_node
(constructor) VLIB_REGISTER_NODE (sctp6_shutdown_phase_node)
Definition: sctp_input.c:1193
static u8 vnet_sctp_get_bbit(sctp_chunks_common_hdr_t *h)
Definition: sctp_packet.h:316
u8 sctp_sub_connection_add_ip4(vlib_main_t *vm, ip4_address_t *lcl_addr, ip4_address_t *rmt_addr)
Definition: sctp.c:295
static u8 sctp_is_bundling(u16 sctp_implied_length, sctp_chunks_common_hdr_t *sctp_common_hdr)
Definition: sctp_input.c:276
static void * vlib_buffer_get_current(vlib_buffer_t *b)
Get pointer to current data to process.
Definition: buffer.h:214
static uword sctp6_established_phase(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: sctp_input.c:1993
sctp_header_t sctp_hdr
Definition: sctp_packet.h:1253
static int sctp_session_enqueue_data(sctp_connection_t *sctp_conn, vlib_buffer_t *b, u16 data_len, u8 conn_idx)
Enqueue data for delivery to application.
Definition: sctp_input.c:666
static uword sctp46_rcv_phase_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame, int is_ip4)
Definition: sctp_input.c:950
#define PREDICT_FALSE(x)
Definition: clib.h:111
static u16 sctp_handle_heartbeat(sctp_hb_req_chunk_t *sctp_hb_chunk, sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b0, u16 *next0)
Definition: sctp_input.c:1579
struct _sctp_connection sctp_connection_t
#define SCTP_IPV6_ADDRESS_TYPE
Definition: sctp_packet.h:778
static u64 sctp_set_time_now(u32 thread_index)
Definition: sctp.h:586
#define vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next, n_left_to_next, bi0, next0)
Finish enqueueing one buffer forward in the graph.
Definition: buffer_node.h:218
int stream_session_accept(transport_connection_t *tc, u32 listener_index, u8 notify)
Accept a stream session.
Definition: session.c:923
#define vlib_get_next_frame(vm, node, next_index, vectors, n_vectors_left)
Get pointer to next frame vector data by (vlib_node_runtime_t, next_index).
Definition: node_funcs.h:338
#define MAX_SCTP_CONNECTIONS
Definition: sctp.h:80
u32 verification_tag
Definition: sctp_packet.h:73
vlib_error_t error
Error code for buffers to be enqueued to error handler.
Definition: buffer.h:139
static char * sctp_state_to_string(u8 state)
Definition: sctp.h:365
static void vlib_node_increment_counter(vlib_main_t *vm, u32 node_index, u32 counter_index, u64 increment)
Definition: node_funcs.h:1150
static u16 sctp_handle_init_ack(sctp_header_t *sctp_hdr, sctp_chunks_common_hdr_t *sctp_chunk_hdr, sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b0, u16 sctp_implied_length)
Definition: sctp_input.c:488
static u8 vnet_sctp_get_chunk_type(sctp_chunks_common_hdr_t *h)
Definition: sctp_packet.h:342
static uword sctp4_listen_phase(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: sctp_input.c:1819
#define MAX_ENQUEABLE_SACKS
Definition: sctp.h:178
u8 * format_sctp_rx_trace_short(u8 *s, va_list *args)
Definition: sctp_input.c:1134
sctp_chunks_common_hdr_t common_hdr
Definition: sctp_packet.h:261
ip4_address_t address
Definition: sctp_packet.h:804
#define VLIB_REGISTER_NODE(x,...)
Definition: node.h:169
void sctp_set_rx_trace_data(sctp_rx_trace_t *rx_trace, sctp_connection_t *sctp_conn, sctp_header_t *sctp_hdr, vlib_buffer_t *b0, u8 is_ip4)
Definition: sctp_input.c:241
u16 n_vectors
Definition: node.h:420
vlib_main_t * vm
Definition: buffer.c:301
u8 * format_sctp_connection(u8 *s, va_list *args)
Definition: sctp.c:233
static uword sctp4_input_dispatcher(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: sctp_input.c:2299
#define clib_warning(format, args...)
Definition: error.h:59
#define ARRAY_LEN(x)
Definition: clib.h:62
void vlib_put_next_frame(vlib_main_t *vm, vlib_node_runtime_t *r, u32 next_index, u32 n_vectors_left)
Release pointer to next frame vector data.
Definition: main.c:452
#define foreach_sctp4_input_next
Definition: sctp_input.c:108
static u32 sctp_header_bytes()
Definition: sctp.h:644
clib_error_t * sctp_input_init(vlib_main_t *vm)
Definition: sctp_input.c:2549
#define sctp_next_drop(is_ip4)
Definition: sctp_input.c:237
static void * ip6_next_header(ip6_header_t *i)
Definition: ip6_packet.h:405
char hostname[FQDN_MAX_LENGTH]
Definition: sctp_packet.h:945
static u16 sctp_handle_heartbeat_ack(sctp_hb_ack_chunk_t *sctp_hb_ack_chunk, sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b0, u16 *next0)
Definition: sctp_input.c:1598
void sctp_send_shutdown_complete(sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b0)
Definition: sctp_output.c:1299
vlib_node_registration_t sctp6_established_phase_node
(constructor) VLIB_REGISTER_NODE (sctp6_established_phase_node)
Definition: sctp_input.c:1536
vlib_node_registration_t sctp6_init_phase_node
(constructor) VLIB_REGISTER_NODE (sctp6_init_phase_node)
Definition: sctp_input.c:1171
static uword sctp6_rcv_phase(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: sctp_input.c:1127
void sctp_prepare_operation_error(sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b, u8 err_cause)
Convert buffer to ERROR.
Definition: sctp_output.c:645
sctp_header_t sctp_hdr
Definition: sctp_packet.h:590
static sctp_connection_t * sctp_half_open_connection_get(u32 conn_index)
Definition: sctp.h:558
u16 cached_next_index
Next frame index that vector arguments were last enqueued to last time this node ran.
Definition: node.h:537
static u16 sctp_handle_operation_err(sctp_header_t *sctp_hdr, sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b, u16 *next0)
Definition: sctp_input.c:286
#define ASSERT(truth)
sctp_opt_params_hdr_t param_hdr
Definition: sctp_packet.h:1313
static int sctp_session_enqueue_data_ooo(sctp_connection_t *sctp_conn, vlib_buffer_t *b, u16 data_len, u8 conn_idx)
Enqueue data out-of-order for delivery to application.
Definition: sctp_input.c:611
#define SCTP_PRIMARY_PATH_IDX
Definition: sctp.h:81
static uword sctp46_shutdown_phase_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame, int is_ip4)
Definition: sctp_input.c:1308
#define SCTP_CONN_TRACKING_DBG(_fmt, _args...)
Definition: sctp_debug.h:66
sctp_connection_t sctp_connection
Definition: sctp_input.c:231
format_function_t format_sctp_header
Definition: format.h:101
static void vlib_buffer_advance(vlib_buffer_t *b, word l)
Advance current data pointer by the supplied (signed!) amount.
Definition: buffer.h:233
sctp_chunks_common_hdr_t chunk_hdr
Definition: sctp_packet.h:1452
void sctp_connection_cleanup(sctp_connection_t *sctp_conn)
Cleans up connection state.
Definition: sctp.c:528
enum _sctp_established_phase_next sctp_established_phase_next_t
static vlib_main_t * vlib_get_main(void)
Definition: global_funcs.h:23
void sctp_prepare_initack_chunk(sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b, ip4_address_t *ip4_addr, u8 add_ip4, ip6_address_t *ip6_addr, u8 add_ip6)
Convert buffer to INIT-ACK.
Definition: sctp_output.c:871
void sctp_prepare_cookie_echo_chunk(sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b, u8 reuse_buffer)
Definition: sctp_output.c:562
static void sctp_timer_update(sctp_connection_t *tc, u8 conn_idx, u8 timer_id, u32 interval)
Definition: sctp.h:730
static void * vlib_add_trace(vlib_main_t *vm, vlib_node_runtime_t *r, vlib_buffer_t *b, u32 n_data_bytes)
Definition: trace_funcs.h:57
static u16 sctp_handle_sack(sctp_selective_ack_chunk_t *sack_chunk, sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b0, u16 *next0)
Definition: sctp_input.c:1539
struct _vlib_node_registration vlib_node_registration_t
static sctp_connection_t * sctp_connection_get(u32 conn_index, u32 thread_index)
Definition: sctp.h:755
u16 payload_length
Definition: ip6_packet.h:369
#define SCTP_IPV4_ADDRESS_TYPE
Definition: sctp_packet.h:776
static uword sctp46_listen_process_inline(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame, int is_ip4)
Definition: sctp_input.c:1628
static u16 sctp_handle_data(sctp_payload_data_chunk_t *sctp_data_chunk, sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b, u16 *next0)
Definition: sctp_input.c:771
sctp_err_cause_param_t err_causes[]
Definition: sctp_packet.h:1340
static uword sctp4_shutdown_phase(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: sctp_input.c:1473
static u16 sctp_handle_cookie_ack(sctp_header_t *sctp_hdr, sctp_chunks_common_hdr_t *sctp_chunk_hdr, sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b0, u16 *next0)
Definition: sctp_input.c:919
u64 uword
Definition: types.h:112
static void * vlib_frame_vector_args(vlib_frame_t *f)
Get pointer to frame vector data.
Definition: node_funcs.h:244
static uword sctp4_rcv_phase(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: sctp_input.c:1120
#define sctp_next_output(is_ip4)
Definition: sctp_input.c:234
static u8 sctp_is_sack_delayable(sctp_connection_t *sctp_conn, u8 idx, u8 is_gapping)
Definition: sctp_input.c:718
clib_error_t * sctp_init(vlib_main_t *vm)
Definition: sctp.c:968
sctp_chunks_common_hdr_t chunk_hdr
Definition: sctp_packet.h:771
static uword sctp4_established_phase(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: sctp_input.c:1985
#define vnet_buffer(b)
Definition: buffer.h:368
int session_manager_flush_enqueue_events(u8 transport_proto, u32 thread_index)
Flushes queue of sessions that are to be notified of new data enqueued events.
Definition: session.c:576
static u16 vnet_sctp_get_chunk_length(sctp_chunks_common_hdr_t *h)
Definition: sctp_packet.h:355
static char * sctp_chunk_to_string(u8 type)
Definition: sctp.h:390
int session_stream_connect_notify(transport_connection_t *tc, u8 is_fail)
Definition: session.c:630
static u8 sctp_sub_conn_id_via_ip6h(sctp_connection_t *sctp_conn, ip6_header_t *ip6h)
Definition: sctp.h:785
u8 data[0]
Packet data.
Definition: buffer.h:176
u8 * format_sctp_rx_trace(u8 *s, va_list *args)
Definition: sctp_input.c:2001
#define SCTP_COOKIE_PRESERVATIVE_TYPE
Definition: sctp_packet.h:782
static sctp_connection_t * sctp_listener_get(u32 tli)
Definition: sctp.h:747
static int ip4_header_bytes(const ip4_header_t *i)
Definition: ip4_packet.h:235
vlib_node_registration_t sctp4_listen_phase_node
(constructor) VLIB_REGISTER_NODE (sctp4_listen_phase_node)
Definition: sctp_input.c:1532
u32 flags
buffer flags: VLIB_BUFFER_FREE_LIST_INDEX_MASK: bits used to store free list index, VLIB_BUFFER_IS_TRACED: trace this buffer.
Definition: buffer.h:117
#define foreach_sctp6_input_next
Definition: sctp_input.c:117
static sctp_header_t * sctp_buffer_hdr(vlib_buffer_t *b)
Definition: sctp.h:548
u8 sctp_sub_connection_add_ip6(vlib_main_t *vm, ip6_address_t *lcl_addr, ip6_address_t *rmt_addr)
Definition: sctp.c:352
enum _sctp_state_next sctp_state_next_t
static vlib_buffer_t * vlib_get_buffer(vlib_main_t *vm, u32 buffer_index)
Translate buffer index into buffer pointer.
Definition: buffer_funcs.h:62
#define foreach_sctp_state_next
Definition: sctp_input.c:29
static void sctp_node_inc_counter(vlib_main_t *vm, u32 sctp4_node, u32 sctp6_node, u8 is_ip4, u8 evt, u8 val)
Definition: sctp_input.c:1615
#define SCTP_DBG_STATE_MACHINE(_fmt, _args...)
Definition: sctp_debug.h:31
static uword sctp6_shutdown_phase(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: sctp_input.c:1480
static uword sctp6_listen_phase(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: sctp_input.c:1826
static uword sctp6_input_dispatcher(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *from_frame)
Definition: sctp_input.c:2306
void sctp_send_shutdown_ack(sctp_connection_t *sctp_conn, u8 idx, vlib_buffer_t *b)
Definition: sctp_output.c:1108
format_function_t format_sctp_state
Definition: sctp.h:302
ip6_address_t dst_address
Definition: ip6_packet.h:378
char * phase_to_string(u8 phase)
Definition: sctp_input.c:88
#define SCTP_SUPPORTED_ADDRESS_TYPES
Definition: sctp_packet.h:785