2 * Copyright (c) 2017 SUSE LLC.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #ifndef included_vnet_sctp_h
16 #define included_vnet_sctp_h
18 #include <vnet/vnet.h>
19 #include <vnet/ip/ip.h>
20 #include <vnet/sctp/sctp_timer.h>
21 #include <vnet/sctp/sctp_packet.h>
22 #include <vnet/session/transport.h>
23 #include <vnet/session/session.h>
26 #define foreach_sctp_timer \
27 _(T1_INIT, "T1_INIT") \
28 _(T1_COOKIE, "T1_COOKIE") \
29 _(T2_SHUTDOWN, "T2_SHUTDOWN") \
30 _(T3_RXTX, "T3_RXTX") \
31 _(T4_HEARTBEAT, "T4_HB") \
32 _(T5_SHUTDOWN_GUARD, "T5_SHUTDOWN_GUARD")
34 typedef enum _sctp_timers
36 #define _(sym, str) SCTP_TIMER_##sym,
42 #define SCTP_TIMER_HANDLE_INVALID ((u32) ~0)
45 sctp_timer_to_string (u8 timer_id)
49 case SCTP_TIMER_T1_INIT:
50 return "SCTP_TIMER_T1_INIT";
51 case SCTP_TIMER_T1_COOKIE:
52 return "SCTP_TIMER_T1_COOKIE";
53 case SCTP_TIMER_T2_SHUTDOWN:
54 return "SCTP_TIMER_T2_SHUTDOWN";
55 case SCTP_TIMER_T3_RXTX:
56 return "SCTP_TIMER_T3_RXTX";
57 case SCTP_TIMER_T4_HEARTBEAT:
58 return "SCTP_TIMER_T4_HEARTBEAT";
59 case SCTP_TIMER_T5_SHUTDOWN_GUARD:
60 return "SCTP_TIMER_T5_SHUTDOWN_GUARD";
65 typedef enum _sctp_error
67 #define sctp_error(n,s) SCTP_ERROR_##n,
68 #include <vnet/sctp/sctp_error.def>
75 #define IS_T_BIT_SET(var) ((var) & (1))
76 #define IS_E_BIT_SET(var) ((var) & (1))
77 #define IS_B_BIT_SET(var) ((var) & (1<<1))
78 #define IS_U_BIT_SET(var) ((var) & (1<<2))
80 #define MAX_SCTP_CONNECTIONS 32
81 #define MAIN_SCTP_SUB_CONN_IDX 0
83 #if (VLIB_BUFFER_TRACE_TRAJECTORY)
84 #define sctp_trajectory_add_start(b, start) \
86 (*vlib_buffer_trace_trajectory_cb) (b, start); \
89 #define sctp_trajectory_add_start(b, start)
92 typedef struct _sctp_sub_connection
94 transport_connection_t connection; /**< Common transport data. First! */
95 void *parent; /**< Link to the parent-super connection */
97 u32 error_count; /**< The current error count for this destination. */
98 u32 error_threshold; /**< Current error threshold for this destination,
99 i.e. what value marks the destination down if error count reaches this value. */
100 u32 cwnd; /**< The current congestion window. */
101 u32 ssthresh; /**< The current ssthresh value. */
103 u32 rtt_ts; /**< USED to hold the timestamp of when the packet has been sent */
105 u32 RTO; /**< The current retransmission timeout value. */
106 u32 SRTT; /**< The current smoothed round-trip time. */
107 f32 RTTVAR; /**< The current RTT variation. */
109 u32 partially_acked_bytes; /**< The tracking method for increase of cwnd when in
110 congestion avoidance mode (see Section 7.2.2).*/
112 u8 state; /**< The current state of this destination, i.e., DOWN, UP, ALLOW-HB, NO-HEARTBEAT, etc. */
114 u16 PMTU; /**< The current known path MTU. */
116 u32 timers[SCTP_N_TIMERS]; /**< A timer used by each destination. */
118 u8 RTO_pending; /**< A flag used to track if one of the DATA chunks sent to
119 this address is currently being used to compute an RTT.
120 If this flag is 0, the next DATA chunk sent to this destination
121 should be used to compute an RTT and this flag should be set.
122 Every time the RTT calculation completes (i.e., the DATA chunk is SACK'd),
125 u32 last_time; /**< The time to which this destination was last sent a packet to.
126 This can be used to determine if a HEARTBEAT is needed. */
128 u8 unacknowledged_hb; /**< Used to track how many unacknowledged heartbeats we had;
129 If more than Max.Retransmit then connetion is considered unreachable. */
131 u8 is_retransmitting; /**< A flag (0 = no, 1 = yes) indicating whether the connection is retransmitting a previous packet */
133 } sctp_sub_connection_t;
137 u32 a_rwnd; /**< Maximum segment size advertised */
141 /* Useful macros to deal with the out_of_order_map (array of bit) */
142 #define SET_BIT(A,k) ( A[(k/32)] |= (1 << (k%32)) )
143 #define CLEAR_BIT(A,k) ( A[(k/32)] &= ~(1 << (k%32)) )
144 #define TEST_BIT(A,k) ( A[(k/32)] & (1 << (k%32)) )
147 _bytes_swap (void *pv, size_t n)
151 for (lo = 0, hi = n - 1; hi > lo; lo++, hi--)
159 #define ENDIANESS_SWAP(x) _bytes_swap(&x, sizeof(x));
161 #define MAX_INFLIGHT_PACKETS 128
162 #define MAX_ENQUEABLE_SACKS 2
164 /* This parameter indicates to the receiver how much increment in
165 * milliseconds the sender wishes the receiver to add to its default
168 #define SUGGESTED_COOKIE_LIFE_SPAN_INCREMENT 1000
170 typedef struct _sctp_connection
172 sctp_sub_connection_t sub_conn[MAX_SCTP_CONNECTIONS]; /**< Common transport data. First! */
174 u8 state; /**< SCTP state as per sctp_state_t */
175 u16 flags; /**< Chunk flag (see sctp_chunks_common_hdr_t) */
177 u32 local_tag; /**< INIT_TAG generated locally */
178 u32 remote_tag; /**< INIT_TAG generated by the remote peer */
180 u32 local_initial_tsn; /**< Initial TSN generated locally */
181 u32 remote_initial_tsn; /**< Initial TSN generated by the remote-peer */
183 u32 peer_cookie_life_span_increment;
185 u32 overall_err_count; /**< The overall association error count. */
186 u32 overall_err_treshold; /**< The threshold for this association that if the Overall Error Count
187 reaches will cause this association to be torn down. */
189 u32 peer_rwnd; /**< Current calculated value of the peer's rwnd. */
191 u32 next_tsn; /**< The next TSN number to be assigned to a new DATA chunk.
192 This is sent in the INIT or INIT ACK chunk to the peer
193 and incremented each time a DATA chunk is assigned a
194 TSN (normally just prior to transmit or during
197 u32 next_tsn_expected; /**< The next TSN number expected to be received. */
199 u32 last_rcvd_tsn; /**< This is the last TSN received in sequence. This value
200 is set initially by taking the peer's initial TSN,
201 received in the INIT or INIT ACK chunk, and
202 subtracting one from it. */
204 u32 out_of_order_map[MAX_INFLIGHT_PACKETS]; /**< An array of bits or bytes indicating which out-of-order
205 TSNs have been received (relative to the Last Rcvd TSN).
206 If no gaps exist, i.e., no out-of-order packets have been received,
207 this array will be set to all zero. */
209 u8 ack_state; /**< This flag indicates if the next received packet is set to be responded to with a SACK.
210 This is initialized to 0. When a packet is received it is incremented.
211 If this value reaches 2 or more, a SACK is sent and the value is reset to 0.
212 Note: This is used only when no DATA chunks are received out-of-order.
213 When DATA chunks are out-of-order, SACKs are not delayed (see Section 6). */
215 u32 a_rwnd; /** This value represents the dedicated buffer space, in number of bytes,
216 the sender of the INIT has reserved in association with this window.
217 During the life of the association, this buffer space SHOULD NOT be lessened
218 (i.e., dedicated buffers taken away from this association);
219 however, an endpoint MAY change the value of a_rwnd it sends in SACK chunks. */
221 u32 smallest_PMTU; /** The smallest PMTU discovered for all of the peer's transport addresses. */
223 u32 rcv_a_rwnd; /**< LOCAL max seg size that includes options. To be updated by congestion algos, etc. */
224 u32 snd_a_rwnd; /**< REMOTE max seg size that includes options. To be updated if peer pushes back on window, etc.*/
226 u8 overall_sending_status; /**< 0 indicates first fragment of a user message
227 1 indicates normal stream
228 2 indicates last fragment of a user message */
230 sctp_options_t rcv_opts;
231 sctp_options_t snd_opts;
233 u32 snd_hdr_length; /**< BASE HEADER LENGTH for the DATA chunk when sending */
234 u8 next_avail_sub_conn; /**< Represent the index of the next free slot in sub_conn */
238 typedef void (sctp_timer_expiration_handler) (u32 conn_index, u32 timer_id);
240 sctp_connection_t *sctp_connection_new (u8 thread_index);
241 void sctp_sub_connection_add_ip4 (u8 thread_index,
242 sctp_ipv4_addr_param_t * ipv4_addr);
243 void sctp_sub_connection_add_ip6 (u8 thread_index,
244 sctp_ipv6_addr_param_t * ipv6_addr);
245 void sctp_connection_close (sctp_connection_t * sctp_conn);
246 void sctp_connection_cleanup (sctp_connection_t * sctp_conn);
247 void sctp_connection_del (sctp_connection_t * sctp_conn);
249 u32 sctp_push_header (transport_connection_t * tconn, vlib_buffer_t * b);
250 void sctp_send_init (sctp_connection_t * sctp_conn);
251 void sctp_send_shutdown (sctp_connection_t * sctp_conn);
252 void sctp_send_shutdown_ack (sctp_connection_t * sctp_conn,
254 void sctp_send_shutdown_complete (sctp_connection_t * sctp_conn,
256 void sctp_send_heartbeat (sctp_connection_t * sctp_conn);
257 void sctp_flush_frame_to_output (vlib_main_t * vm, u8 thread_index,
259 void sctp_flush_frames_to_output (u8 thread_index);
260 void sctp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add);
262 format_function_t format_sctp_state;
264 u8 *format_sctp_connection_id (u8 * s, va_list * args);
265 u8 *format_sctp_connection (u8 * s, va_list * args);
266 u8 *format_sctp_scoreboard (u8 * s, va_list * args);
267 u8 *format_sctp_header (u8 * s, va_list * args);
268 u8 *format_sctp_tx_trace (u8 * s, va_list * args);
270 clib_error_t *sctp_init (vlib_main_t * vm);
271 void sctp_connection_timers_init (sctp_connection_t * tc);
272 void sctp_connection_timers_reset (sctp_connection_t * tc);
273 void sctp_init_snd_vars (sctp_connection_t * tc);
274 void sctp_init_mss (sctp_connection_t * tc);
276 void sctp_prepare_initack_chunk (sctp_connection_t * ts, vlib_buffer_t * b,
277 ip4_address_t * ip4_addr,
278 ip6_address_t * ip6_addr);
279 void sctp_prepare_cookie_echo_chunk (sctp_connection_t * tc,
281 sctp_state_cookie_param_t * sc);
282 void sctp_prepare_cookie_ack_chunk (sctp_connection_t * tc,
284 void sctp_prepare_sack_chunk (sctp_connection_t * tc, vlib_buffer_t * b);
285 void sctp_prepare_heartbeat_ack_chunk (sctp_connection_t * sctp_conn,
288 u16 sctp_check_outstanding_data_chunks (sctp_connection_t * tc);
290 #define IP_PROTOCOL_SCTP 132
292 /** SSCTP FSM state definitions as per RFC4960. */
293 #define foreach_sctp_fsm_state \
294 _(CLOSED, "CLOSED") \
295 _(COOKIE_WAIT, "COOKIE_WAIT") \
296 _(COOKIE_ECHOED, "COOKIE_ECHOED") \
297 _(ESTABLISHED, "ESTABLISHED") \
298 _(SHUTDOWN_PENDING, "SHUTDOWN_PENDING") \
299 _(SHUTDOWN_SENT, "SHUTDOWN_SENT") \
300 _(SHUTDOWN_RECEIVED, "SHUTDOWN_RECEIVED") \
301 _(SHUTDOWN_ACK_SENT, "SHUTDOWN_ACK_SENT")
303 typedef enum _sctp_state
305 #define _(sym, str) SCTP_STATE_##sym,
306 foreach_sctp_fsm_state
312 sctp_state_to_string (u8 state)
316 case SCTP_STATE_CLOSED:
317 return "SCTP_STATE_CLOSED";
318 case SCTP_STATE_COOKIE_WAIT:
319 return "SCTP_STATE_COOKIE_WAIT";
320 case SCTP_STATE_COOKIE_ECHOED:
321 return "SCTP_STATE_COOKIE_ECHOED";
322 case SCTP_STATE_ESTABLISHED:
323 return "SCTP_STATE_ESTABLISHED";
324 case SCTP_STATE_SHUTDOWN_PENDING:
325 return "SCTP_STATE_SHUTDOWN_PENDING";
326 case SCTP_STATE_SHUTDOWN_SENT:
327 return "SCTP_STATE_SHUTDOWN_SENT";
328 case SCTP_STATE_SHUTDOWN_RECEIVED:
329 return "SCTP_STATE_SHUTDOWN_RECEIVED";
330 case SCTP_STATE_SHUTDOWN_ACK_SENT:
331 return "SCTP_STATE_SHUTDOWN_ACK_SENT";
337 sctp_chunk_to_string (u8 type)
352 return "HEARTBEAT_ACK";
358 return "SHUTDOWN_ACK";
359 case OPERATION_ERROR:
360 return "OPERATION_ERROR";
362 return "COOKIE_ECHO";
369 case SHUTDOWN_COMPLETE:
370 return "SHUTDOWN_COMPLETE";
376 sctp_optparam_type_to_string (u8 type)
380 case SCTP_IPV4_ADDRESS_TYPE:
381 return "SCTP_IPV4_ADDRESS_TYPE";
382 case SCTP_IPV6_ADDRESS_TYPE:
383 return "SCTP_IPV6_ADDRESS_TYPE";
384 case SCTP_STATE_COOKIE_TYPE:
385 return "SCTP_STATE_COOKIE_TYPE";
386 case SCTP_UNRECOGNIZED_TYPE:
387 return "SCTP_UNRECOGNIZED_TYPE";
388 case SCTP_COOKIE_PRESERVATIVE_TYPE:
389 return "SCTP_COOKIE_PRESERVATIVE_TYPE";
390 case SCTP_HOSTNAME_ADDRESS_TYPE:
391 return "SCTP_HOSTNAME_ADDRESS_TYPE";
392 case SCTP_SUPPORTED_ADDRESS_TYPES:
393 return "SCTP_SUPPORTED_ADDRESS_TYPES";
398 #define SCTP_TICK 0.001 /**< SCTP tick period (s) */
399 #define SHZ (u32) (1/SCTP_TICK) /**< SCTP tick frequency */
400 #define SCTP_TSTAMP_RESOLUTION SCTP_TICK /**< Time stamp resolution */
402 /* As per RFC4960, page 83 */
403 #define SCTP_RTO_INIT 3 * SHZ /* 3 seconds */
404 #define SCTP_RTO_MIN 1 * SHZ /* 1 second */
405 #define SCTP_RTO_MAX 60 * SHZ /* 60 seconds */
406 #define SCTP_RTO_BURST 4
407 #define SCTP_RTO_ALPHA 1/8
408 #define SCTP_RTO_BETA 1/4
409 #define SCTP_VALID_COOKIE_LIFE 60 * SHZ /* 60 seconds */
410 #define SCTP_ASSOCIATION_MAX_RETRANS 10
412 #define SCTP_TO_TIMER_TICK SCTP_TICK*10 /* Period for converting from SCTP_TICK */
414 typedef struct _sctp_lookup_dispatch
417 } sctp_lookup_dispatch_t;
419 typedef struct _sctp_main
421 /* Per-worker thread SCTP connection pools */
422 sctp_connection_t **connections;
424 /* Pool of listeners. */
425 sctp_connection_t *listener_pool;
427 /** Dispatch table by state and flags */
428 sctp_lookup_dispatch_t dispatch_table[SCTP_N_STATES][64];
430 u8 log2_tstamp_clocks_per_tick;
431 f64 tstamp_ticks_per_clock;
434 /** per-worker tx buffer free lists */
436 /** per-worker tx frames to SCTP 4/6 output nodes */
437 vlib_frame_t **tx_frames[2];
438 /** per-worker tx frames to ip 4/6 lookup nodes */
439 vlib_frame_t **ip_lookup_tx_frames[2];
441 /* Per worker-thread timer wheel for connections timers */
442 tw_timer_wheel_16t_2w_512sl_t *timer_wheels;
444 /* Pool of half-open connections on which we've sent a SYN */
445 sctp_connection_t *half_open_connections;
446 clib_spinlock_t half_open_lock;
448 /* TODO: Congestion control algorithms registered */
449 /* sctp_cc_algorithm_t *cc_algos; */
451 /* Flag that indicates if stack is on or off */
454 /** Number of preallocated connections */
455 u32 preallocated_connections;
457 /** Transport table (preallocation) size parameters */
458 u32 local_endpoints_table_memory;
459 u32 local_endpoints_table_buckets;
461 /** Vectors of src addresses. Optional unless one needs > 63K active-opens */
462 ip4_address_t *ip4_src_addresses;
463 u32 last_v4_address_rotor;
464 u32 last_v6_address_rotor;
465 ip6_address_t *ip6_src_addresses;
467 /** vlib buffer size */
468 u32 bytes_per_buffer;
475 extern sctp_main_t sctp_main;
476 extern vlib_node_registration_t sctp4_input_node;
477 extern vlib_node_registration_t sctp6_input_node;
478 extern vlib_node_registration_t sctp4_output_node;
479 extern vlib_node_registration_t sctp6_output_node;
481 always_inline sctp_main_t *
482 vnet_get_sctp_main ()
487 always_inline sctp_header_t *
488 sctp_buffer_hdr (vlib_buffer_t * b)
490 ASSERT ((signed) b->current_data >= (signed) -VLIB_BUFFER_PRE_DATA_SIZE);
491 return (sctp_header_t *) (b->data + b->current_data
492 + vnet_buffer (b)->sctp.hdr_offset);
495 clib_error_t *vnet_sctp_enable_disable (vlib_main_t * vm, u8 is_en);
497 always_inline sctp_connection_t *
498 sctp_half_open_connection_get (u32 conn_index)
500 sctp_connection_t *tc = 0;
501 clib_spinlock_lock_if_init (&sctp_main.half_open_lock);
502 if (!pool_is_free_index (sctp_main.half_open_connections, conn_index))
503 tc = pool_elt_at_index (sctp_main.half_open_connections, conn_index);
504 tc->sub_conn[MAIN_SCTP_SUB_CONN_IDX].parent = tc;
505 clib_spinlock_unlock_if_init (&sctp_main.half_open_lock);
510 * Cleanup half-open connection
514 sctp_half_open_connection_del (sctp_connection_t * tc)
516 sctp_main_t *tm = vnet_get_sctp_main ();
517 clib_spinlock_lock_if_init (&tm->half_open_lock);
518 pool_put_index (tm->half_open_connections,
519 tc->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_c_index);
521 memset (tc, 0xFA, sizeof (*tc));
522 clib_spinlock_unlock_if_init (&tm->half_open_lock);
526 sctp_set_time_now (u32 thread_index)
528 sctp_main.time_now[thread_index] = clib_cpu_time_now ()
529 * sctp_main.tstamp_ticks_per_clock;
530 return sctp_main.time_now[thread_index];
534 sctp_timer_set (sctp_connection_t * tc, u8 conn_idx, u8 timer_id,
537 ASSERT (tc->sub_conn[conn_idx].connection.thread_index ==
538 vlib_get_thread_index ());
539 ASSERT (tc->sub_conn[conn_idx].timers[timer_id] ==
540 SCTP_TIMER_HANDLE_INVALID);
542 sctp_sub_connection_t *sub = &tc->sub_conn[conn_idx];
543 sub->timers[timer_id] =
544 tw_timer_start_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index],
545 sub->c_c_index, timer_id, interval);
549 sctp_timer_reset (sctp_connection_t * tc, u8 conn_idx, u8 timer_id)
551 ASSERT (tc->sub_conn[conn_idx].c_thread_index == vlib_get_thread_index ());
552 if (tc->sub_conn[conn_idx].timers[timer_id] == SCTP_TIMER_HANDLE_INVALID)
555 sctp_sub_connection_t *sub = &tc->sub_conn[conn_idx];
557 tw_timer_stop_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index],
558 sub->timers[timer_id]);
559 sub->timers[timer_id] = SCTP_TIMER_HANDLE_INVALID;
563 * Try to cleanup half-open connection
565 * If called from a thread that doesn't own tc, the call won't have any
568 * @param tc - connection to be cleaned up
569 * @return non-zero if cleanup failed.
572 sctp_half_open_connection_cleanup (sctp_connection_t * tc)
574 /* Make sure this is the owning thread */
575 if (tc->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_thread_index !=
576 vlib_get_thread_index ())
578 sctp_timer_reset (tc, MAIN_SCTP_SUB_CONN_IDX, SCTP_TIMER_T1_INIT);
579 sctp_half_open_connection_del (tc);
586 return sizeof (sctp_header_t);
589 always_inline sctp_connection_t *
590 sctp_get_connection_from_transport (transport_connection_t * tconn)
592 ASSERT (tconn != NULL);
594 sctp_sub_connection_t *sub = (sctp_sub_connection_t *) tconn;
597 SCTP_ADV_DBG ("sub == NULL");
598 if (sub->parent == NULL)
599 SCTP_ADV_DBG ("sub->parent == NULL");
601 return (sctp_connection_t *) sub->parent;
607 return sctp_main.time_now[vlib_get_thread_index ()];
610 #define ABS(x) ((x) > 0) ? (x) : -(x);
613 sctp_calculate_rto (sctp_connection_t * sctp_conn, u8 conn_idx)
615 /* See RFC4960, 6.3.1. RTO Calculation */
618 u32 now = sctp_time_now ();
619 u32 prev_ts = sctp_conn->sub_conn[conn_idx].rtt_ts;
620 u32 R = prev_ts - now;
622 if (sctp_conn->sub_conn[conn_idx].RTO == 0) // C1: Let's initialize our RTO
624 sctp_conn->sub_conn[conn_idx].RTO = SCTP_RTO_MIN;
628 if (sctp_conn->sub_conn[conn_idx].RTO == SCTP_RTO_MIN && sctp_conn->sub_conn[conn_idx].SRTT == 0) // C2: First RTT calculation
630 sctp_conn->sub_conn[conn_idx].SRTT = R;
634 RTTVAR = 100e-3; /* 100 ms */
636 sctp_conn->sub_conn[conn_idx].RTTVAR = RTTVAR;
638 else // C3: RTT already exists; let's recalculate
640 RTTVAR = (1 - SCTP_RTO_BETA) * sctp_conn->sub_conn[conn_idx].RTTVAR +
641 SCTP_RTO_BETA * ABS (sctp_conn->sub_conn[conn_idx].SRTT - R);
644 RTTVAR = 100e-3; /* 100 ms */
646 sctp_conn->sub_conn[conn_idx].RTTVAR = RTTVAR;
648 sctp_conn->sub_conn[conn_idx].SRTT =
649 (1 - SCTP_RTO_ALPHA) * sctp_conn->sub_conn[conn_idx].SRTT +
654 sctp_conn->sub_conn[conn_idx].SRTT +
655 4 * sctp_conn->sub_conn[conn_idx].RTTVAR;
656 if (RTO < SCTP_RTO_MIN) // C6
659 if (RTO > SCTP_RTO_MAX) // C7
662 sctp_conn->sub_conn[conn_idx].RTO = RTO;
666 sctp_timer_update (sctp_connection_t * tc, u8 conn_idx, u8 timer_id,
669 ASSERT (tc->sub_conn[conn_idx].connection.thread_index ==
670 vlib_get_thread_index ());
671 sctp_sub_connection_t *sub = &tc->sub_conn[conn_idx];
673 if (tc->sub_conn[conn_idx].timers[timer_id] != SCTP_TIMER_HANDLE_INVALID)
674 tw_timer_stop_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index],
675 sub->timers[timer_id]);
677 tc->sub_conn[conn_idx].timers[timer_id] =
678 tw_timer_start_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index],
679 sub->c_c_index, timer_id, interval);
682 always_inline sctp_connection_t *
683 sctp_listener_get (u32 tli)
685 return pool_elt_at_index (sctp_main.listener_pool, tli);
690 always_inline sctp_connection_t *
691 sctp_connection_get (u32 conn_index, u32 thread_index)
694 (pool_is_free_index (sctp_main.connections[thread_index], conn_index)))
696 return pool_elt_at_index (sctp_main.connections[thread_index], conn_index);
700 sctp_pick_conn_idx_on_chunk (sctp_chunk_type chunk_type)
702 u8 idx = MAIN_SCTP_SUB_CONN_IDX;
715 case OPERATION_ERROR:
720 case SHUTDOWN_COMPLETE:
721 idx = MAIN_SCTP_SUB_CONN_IDX;
730 sctp_pick_conn_idx_on_state (sctp_state_t state)
732 u8 idx = MAIN_SCTP_SUB_CONN_IDX;
736 case SCTP_STATE_CLOSED:
737 case SCTP_STATE_COOKIE_WAIT:
738 case SCTP_STATE_COOKIE_ECHOED:
739 case SCTP_STATE_ESTABLISHED:
740 case SCTP_STATE_SHUTDOWN_PENDING:
741 case SCTP_STATE_SHUTDOWN_SENT:
742 case SCTP_STATE_SHUTDOWN_RECEIVED:
743 case SCTP_STATE_SHUTDOWN_ACK_SENT:
744 idx = MAIN_SCTP_SUB_CONN_IDX;
746 idx = MAIN_SCTP_SUB_CONN_IDX;
752 * Push SCTP header to buffer
754 * @param vm - vlib_main
755 * @param b - buffer to write the header to
756 * @param sp_net - source port net order
757 * @param dp_net - destination port net order
758 * @param sctp_hdr_opts_len - header and options length in bytes
760 * @return - pointer to start of SCTP header
763 vlib_buffer_push_sctp_net_order (vlib_buffer_t * b, u16 sp, u16 dp,
764 u8 sctp_hdr_opts_len)
766 sctp_full_hdr_t *full_hdr;
768 full_hdr = vlib_buffer_push_uninit (b, sctp_hdr_opts_len);
770 full_hdr->hdr.src_port = sp;
771 full_hdr->hdr.dst_port = dp;
772 full_hdr->hdr.checksum = 0;
777 * Push SCTP header to buffer
779 * @param b - buffer to write the header to
780 * @param sp_net - source port net order
781 * @param dp_net - destination port net order
782 * @param sctp_hdr_opts_len - header and options length in bytes
784 * @return - pointer to start of SCTP header
787 vlib_buffer_push_sctp (vlib_buffer_t * b, u16 sp_net, u16 dp_net,
788 u8 sctp_hdr_opts_len)
790 return vlib_buffer_push_sctp_net_order (b, sp_net, dp_net,
795 * fd.io coding-style-patch-verification: ON
798 * eval: (c-set-style "gnu")