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)
44 typedef enum _sctp_error
46 #define sctp_error(n,s) SCTP_ERROR_##n,
47 #include <vnet/sctp/sctp_error.def>
54 #define IS_T_BIT_SET(var) ((var) & (1))
55 #define IS_E_BIT_SET(var) ((var) & (1))
56 #define IS_B_BIT_SET(var) ((var) & (1<<1))
57 #define IS_U_BIT_SET(var) ((var) & (1<<2))
59 #define MAX_SCTP_CONNECTIONS 32
60 #define MAIN_SCTP_SUB_CONN_IDX 0
62 #if (VLIB_BUFFER_TRACE_TRAJECTORY)
63 #define sctp_trajectory_add_start(b, start) \
65 (*vlib_buffer_trace_trajectory_cb) (b, start); \
68 #define sctp_trajectory_add_start(b, start)
71 typedef struct _sctp_sub_connection
73 transport_connection_t connection; /**< Common transport data. First! */
74 void *parent; /**< Link to the parent-super connection */
76 u32 error_count; /**< The current error count for this destination. */
77 u32 error_threshold; /**< Current error threshold for this destination,
78 i.e. what value marks the destination down if error count reaches this value. */
79 u32 cwnd; /**< The current congestion window. */
80 u32 ssthresh; /**< The current ssthresh value. */
82 u32 rtt_ts; /**< USED to hold the timestamp of when the packet has been sent */
84 u32 RTO; /**< The current retransmission timeout value. */
85 u32 SRTT; /**< The current smoothed round-trip time. */
86 f32 RTTVAR; /**< The current RTT variation. */
88 u32 partially_acked_bytes; /**< The tracking method for increase of cwnd when in
89 congestion avoidance mode (see Section 7.2.2).*/
91 u8 state; /**< The current state of this destination, i.e., DOWN, UP, ALLOW-HB, NO-HEARTBEAT, etc. */
93 u16 PMTU; /**< The current known path MTU. */
95 u32 timers[SCTP_N_TIMERS]; /**< A timer used by each destination. */
97 u8 RTO_pending; /**< A flag used to track if one of the DATA chunks sent to
98 this address is currently being used to compute an RTT.
99 If this flag is 0, the next DATA chunk sent to this destination
100 should be used to compute an RTT and this flag should be set.
101 Every time the RTT calculation completes (i.e., the DATA chunk is SACK'd),
104 u32 last_time; /**< The time to which this destination was last sent a packet to.
105 This can be used to determine if a HEARTBEAT is needed. */
107 } sctp_sub_connection_t;
111 u32 a_rwnd; /**< Maximum segment size advertised */
115 /* Useful macros to deal with the out_of_order_map (array of bit) */
116 #define SET_BIT(A,k) ( A[(k/32)] |= (1 << (k%32)) )
117 #define CLEAR_BIT(A,k) ( A[(k/32)] &= ~(1 << (k%32)) )
118 #define TEST_BIT(A,k) ( A[(k/32)] & (1 << (k%32)) )
121 _bytes_swap (void *pv, size_t n)
125 for (lo = 0, hi = n - 1; hi > lo; lo++, hi--)
133 #define ENDIANESS_SWAP(x) _bytes_swap(&x, sizeof(x));
135 #define MAX_INFLIGHT_PACKETS 128
136 #define MAX_ENQUEABLE_SACKS 2
138 /* This parameter indicates to the receiver how much increment in
139 * milliseconds the sender wishes the receiver to add to its default
142 #define SUGGESTED_COOKIE_LIFE_SPAN_INCREMENT 1000
144 typedef struct _sctp_connection
146 sctp_sub_connection_t sub_conn[MAX_SCTP_CONNECTIONS]; /**< Common transport data. First! */
148 u8 state; /**< SCTP state as per sctp_state_t */
149 u16 flags; /**< Chunk flag (see sctp_chunks_common_hdr_t) */
151 u32 local_tag; /**< INIT_TAG generated locally */
152 u32 remote_tag; /**< INIT_TAG generated by the remote peer */
154 u32 local_initial_tsn; /**< Initial TSN generated locally */
155 u32 remote_initial_tsn; /**< Initial TSN generated by the remote-peer */
157 u32 peer_cookie_life_span_increment;
159 u32 overall_err_count; /**< The overall association error count. */
160 u32 overall_err_treshold; /**< The threshold for this association that if the Overall Error Count
161 reaches will cause this association to be torn down. */
163 u32 peer_rwnd; /**< Current calculated value of the peer's rwnd. */
165 u32 next_tsn; /**< The next TSN number to be assigned to a new DATA chunk.
166 This is sent in the INIT or INIT ACK chunk to the peer
167 and incremented each time a DATA chunk is assigned a
168 TSN (normally just prior to transmit or during
171 u32 next_tsn_expected; /**< The next TSN number expected to be received. */
173 u32 last_rcvd_tsn; /**< This is the last TSN received in sequence. This value
174 is set initially by taking the peer's initial TSN,
175 received in the INIT or INIT ACK chunk, and
176 subtracting one from it. */
178 u32 out_of_order_map[MAX_INFLIGHT_PACKETS]; /**< An array of bits or bytes indicating which out-of-order
179 TSNs have been received (relative to the Last Rcvd TSN).
180 If no gaps exist, i.e., no out-of-order packets have been received,
181 this array will be set to all zero. */
183 u8 ack_state; /**< This flag indicates if the next received packet is set to be responded to with a SACK.
184 This is initialized to 0. When a packet is received it is incremented.
185 If this value reaches 2 or more, a SACK is sent and the value is reset to 0.
186 Note: This is used only when no DATA chunks are received out-of-order.
187 When DATA chunks are out-of-order, SACKs are not delayed (see Section 6). */
189 u32 a_rwnd; /** This value represents the dedicated buffer space, in number of bytes,
190 the sender of the INIT has reserved in association with this window.
191 During the life of the association, this buffer space SHOULD NOT be lessened
192 (i.e., dedicated buffers taken away from this association);
193 however, an endpoint MAY change the value of a_rwnd it sends in SACK chunks. */
195 u32 smallest_PMTU; /** The smallest PMTU discovered for all of the peer's transport addresses. */
197 u32 rcv_a_rwnd; /**< LOCAL max seg size that includes options. To be updated by congestion algos, etc. */
198 u32 snd_a_rwnd; /**< REMOTE max seg size that includes options. To be updated if peer pushes back on window, etc.*/
200 u8 overall_sending_status; /**< 0 indicates first fragment of a user message
201 1 indicates normal stream
202 2 indicates last fragment of a user message */
204 sctp_options_t rcv_opts;
205 sctp_options_t snd_opts;
207 u32 snd_hdr_length; /**< BASE HEADER LENGTH for the DATA chunk when sending */
208 u8 next_avail_sub_conn; /**< Represent the index of the next free slot in sub_conn */
212 typedef void (sctp_timer_expiration_handler) (u32 conn_index, u32 timer_id);
214 sctp_connection_t *sctp_connection_new (u8 thread_index);
215 void sctp_sub_connection_add_ip4 (u8 thread_index,
216 sctp_ipv4_addr_param_t * ipv4_addr);
217 void sctp_sub_connection_add_ip6 (u8 thread_index,
218 sctp_ipv6_addr_param_t * ipv6_addr);
219 void sctp_connection_close (sctp_connection_t * tc);
220 void sctp_connection_cleanup (sctp_connection_t * tc);
221 void sctp_connection_del (sctp_connection_t * tc);
223 u32 sctp_push_header (transport_connection_t * tconn, vlib_buffer_t * b);
224 void sctp_send_init (sctp_connection_t * tc);
225 void sctp_send_shutdown (sctp_connection_t * tc);
226 void sctp_send_shutdown_ack (sctp_connection_t * tc);
227 void sctp_send_shutdown_complete (sctp_connection_t * tc);
228 void sctp_flush_frame_to_output (vlib_main_t * vm, u8 thread_index,
230 void sctp_flush_frames_to_output (u8 thread_index);
231 void sctp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add);
233 format_function_t format_sctp_state;
235 u8 *format_sctp_connection_id (u8 * s, va_list * args);
236 u8 *format_sctp_connection (u8 * s, va_list * args);
237 u8 *format_sctp_scoreboard (u8 * s, va_list * args);
238 u8 *format_sctp_header (u8 * s, va_list * args);
239 u8 *format_sctp_tx_trace (u8 * s, va_list * args);
241 clib_error_t *sctp_init (vlib_main_t * vm);
242 void sctp_connection_timers_init (sctp_connection_t * tc);
243 void sctp_connection_timers_reset (sctp_connection_t * tc);
244 void sctp_init_snd_vars (sctp_connection_t * tc);
245 void sctp_init_mss (sctp_connection_t * tc);
247 void sctp_prepare_initack_chunk (sctp_connection_t * ts, vlib_buffer_t * b,
248 ip4_address_t * ip4_addr,
249 ip6_address_t * ip6_addr);
250 void sctp_prepare_cookie_echo_chunk (sctp_connection_t * tc,
252 sctp_state_cookie_param_t * sc);
253 void sctp_prepare_cookie_ack_chunk (sctp_connection_t * tc,
255 void sctp_prepare_sack_chunk (sctp_connection_t * tc, vlib_buffer_t * b);
257 u16 sctp_check_outstanding_data_chunks (sctp_connection_t * tc);
259 #define SCTP_TICK 0.001 /**< SCTP tick period (s) */
260 #define STHZ (u32) (1/SCTP_TICK) /**< SCTP tick frequency */
261 #define SCTP_TSTAMP_RESOLUTION SCTP_TICK /**< Time stamp resolution */
262 #define SCTP_PAWS_IDLE 24 * 24 * 60 * 60 * THZ /**< 24 days */
263 #define SCTP_FIB_RECHECK_PERIOD 1 * THZ /**< Recheck every 1s */
264 #define SCTP_MAX_OPTION_SPACE 40
266 #define SCTP_DUPACK_THRESHOLD 3
267 #define SCTP_MAX_RX_FIFO_SIZE 4 << 20
268 #define SCTP_MIN_RX_FIFO_SIZE 4 << 10
269 #define SCTP_IW_N_SEGMENTS 10
270 #define SCTP_ALWAYS_ACK 1 /**< On/off delayed acks */
271 #define SCTP_USE_SACKS 1 /**< Disable only for testing */
273 #define IP_PROTOCOL_SCTP 132
275 /** SSCTP FSM state definitions as per RFC4960. */
276 #define foreach_sctp_fsm_state \
277 _(CLOSED, "CLOSED") \
278 _(COOKIE_WAIT, "COOKIE_WAIT") \
279 _(COOKIE_ECHOED, "COOKIE_ECHOED") \
280 _(ESTABLISHED, "ESTABLISHED") \
281 _(SHUTDOWN_PENDING, "SHUTDOWN_PENDING") \
282 _(SHUTDOWN_SENT, "SHUTDOWN_SENT") \
283 _(SHUTDOWN_RECEIVED, "SHUTDOWN_RECEIVED") \
284 _(SHUTDOWN_ACK_SENT, "SHUTDOWN_ACK_SENT")
286 typedef enum _sctp_state
288 #define _(sym, str) SCTP_STATE_##sym,
289 foreach_sctp_fsm_state
295 sctp_state_to_string (u8 state)
299 case SCTP_STATE_CLOSED:
300 return "SCTP_STATE_CLOSED";
301 case SCTP_STATE_COOKIE_WAIT:
302 return "SCTP_STATE_COOKIE_WAIT";
303 case SCTP_STATE_COOKIE_ECHOED:
304 return "SCTP_STATE_COOKIE_ECHOED";
305 case SCTP_STATE_ESTABLISHED:
306 return "SCTP_STATE_ESTABLISHED";
307 case SCTP_STATE_SHUTDOWN_PENDING:
308 return "SCTP_STATE_SHUTDOWN_PENDING";
309 case SCTP_STATE_SHUTDOWN_SENT:
310 return "SCTP_STATE_SHUTDOWN_SENT";
311 case SCTP_STATE_SHUTDOWN_RECEIVED:
312 return "SCTP_STATE_SHUTDOWN_RECEIVED";
313 case SCTP_STATE_SHUTDOWN_ACK_SENT:
314 return "SCTP_STATE_SHUTDOWN_ACK_SENT";
320 sctp_chunk_to_string (u8 type)
335 return "HEARTBEAT_ACK";
341 return "SHUTDOWN_ACK";
342 case OPERATION_ERROR:
343 return "OPERATION_ERROR";
345 return "COOKIE_ECHO";
352 case SHUTDOWN_COMPLETE:
353 return "SHUTDOWN_COMPLETE";
359 sctp_optparam_type_to_string (u8 type)
363 case SCTP_IPV4_ADDRESS_TYPE:
364 return "SCTP_IPV4_ADDRESS_TYPE";
365 case SCTP_IPV6_ADDRESS_TYPE:
366 return "SCTP_IPV6_ADDRESS_TYPE";
367 case SCTP_STATE_COOKIE_TYPE:
368 return "SCTP_STATE_COOKIE_TYPE";
369 case SCTP_UNRECOGNIZED_TYPE:
370 return "SCTP_UNRECOGNIZED_TYPE";
371 case SCTP_COOKIE_PRESERVATIVE_TYPE:
372 return "SCTP_COOKIE_PRESERVATIVE_TYPE";
373 case SCTP_HOSTNAME_ADDRESS_TYPE:
374 return "SCTP_HOSTNAME_ADDRESS_TYPE";
375 case SCTP_SUPPORTED_ADDRESS_TYPES:
376 return "SCTP_SUPPORTED_ADDRESS_TYPES";
381 #define SCTP_TICK 0.001 /**< SCTP tick period (s) */
382 #define SHZ (u32) (1/SCTP_TICK) /**< SCTP tick frequency */
384 /* As per RFC4960, page 83 */
385 #define SCTP_RTO_INIT 3 * SHZ /* 3 seconds */
386 #define SCTP_RTO_MIN 1 * SHZ /* 1 second */
387 #define SCTP_RTO_MAX 60 * SHZ /* 60 seconds */
388 #define SCTP_RTO_BURST 4
389 #define SCTP_RTO_ALPHA 1/8
390 #define SCTP_RTO_BETA 1/4
391 #define SCTP_VALID_COOKIE_LIFE 60 * SHZ /* 60 seconds */
392 #define SCTP_ASSOCIATION_MAX_RETRANS 10
394 #define SCTP_TO_TIMER_TICK SCTP_TICK*10 /* Period for converting from SCTP_TICK */
396 typedef struct _sctp_lookup_dispatch
399 } sctp_lookup_dispatch_t;
401 typedef struct _sctp_main
403 /* Per-worker thread SCTP connection pools */
404 sctp_connection_t **connections;
406 /* Pool of listeners. */
407 sctp_connection_t *listener_pool;
409 /** Dispatch table by state and flags */
410 sctp_lookup_dispatch_t dispatch_table[SCTP_N_STATES][64];
412 u8 log2_tstamp_clocks_per_tick;
413 f64 tstamp_ticks_per_clock;
416 /** per-worker tx buffer free lists */
418 /** per-worker tx frames to SCTP 4/6 output nodes */
419 vlib_frame_t **tx_frames[2];
420 /** per-worker tx frames to ip 4/6 lookup nodes */
421 vlib_frame_t **ip_lookup_tx_frames[2];
423 /* Per worker-thread timer wheel for connections timers */
424 tw_timer_wheel_16t_2w_512sl_t *timer_wheels;
426 /* Pool of half-open connections on which we've sent a SYN */
427 sctp_connection_t *half_open_connections;
428 clib_spinlock_t half_open_lock;
430 /* TODO: Congestion control algorithms registered */
431 /* sctp_cc_algorithm_t *cc_algos; */
433 /* Flag that indicates if stack is on or off */
436 /** Number of preallocated connections */
437 u32 preallocated_connections;
439 /** Transport table (preallocation) size parameters */
440 u32 local_endpoints_table_memory;
441 u32 local_endpoints_table_buckets;
443 /** Vectors of src addresses. Optional unless one needs > 63K active-opens */
444 ip4_address_t *ip4_src_addresses;
445 u32 last_v4_address_rotor;
446 u32 last_v6_address_rotor;
447 ip6_address_t *ip6_src_addresses;
449 /** vlib buffer size */
450 u32 bytes_per_buffer;
457 extern sctp_main_t sctp_main;
458 extern vlib_node_registration_t sctp4_input_node;
459 extern vlib_node_registration_t sctp6_input_node;
460 extern vlib_node_registration_t sctp4_output_node;
461 extern vlib_node_registration_t sctp6_output_node;
463 always_inline sctp_main_t *
464 vnet_get_sctp_main ()
469 always_inline sctp_header_t *
470 sctp_buffer_hdr (vlib_buffer_t * b)
472 ASSERT ((signed) b->current_data >= (signed) -VLIB_BUFFER_PRE_DATA_SIZE);
473 return (sctp_header_t *) (b->data + b->current_data
474 + vnet_buffer (b)->sctp.hdr_offset);
477 clib_error_t *vnet_sctp_enable_disable (vlib_main_t * vm, u8 is_en);
479 always_inline sctp_connection_t *
480 sctp_half_open_connection_get (u32 conn_index)
482 sctp_connection_t *tc = 0;
483 clib_spinlock_lock_if_init (&sctp_main.half_open_lock);
484 if (!pool_is_free_index (sctp_main.half_open_connections, conn_index))
485 tc = pool_elt_at_index (sctp_main.half_open_connections, conn_index);
486 tc->sub_conn[MAIN_SCTP_SUB_CONN_IDX].parent = tc;
487 clib_spinlock_unlock_if_init (&sctp_main.half_open_lock);
492 * Cleanup half-open connection
496 sctp_half_open_connection_del (sctp_connection_t * tc)
498 sctp_main_t *tm = vnet_get_sctp_main ();
499 clib_spinlock_lock_if_init (&tm->half_open_lock);
500 pool_put_index (tm->half_open_connections,
501 tc->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_c_index);
503 memset (tc, 0xFA, sizeof (*tc));
504 clib_spinlock_unlock_if_init (&tm->half_open_lock);
508 sctp_set_time_now (u32 thread_index)
510 sctp_main.time_now[thread_index] = clib_cpu_time_now ()
511 * sctp_main.tstamp_ticks_per_clock;
512 return sctp_main.time_now[thread_index];
516 sctp_timer_set (sctp_connection_t * tc, u8 conn_idx, u8 timer_id,
519 ASSERT (tc->sub_conn[conn_idx].connection.thread_index ==
520 vlib_get_thread_index ());
521 ASSERT (tc->sub_conn[conn_idx].timers[timer_id] ==
522 SCTP_TIMER_HANDLE_INVALID);
524 sctp_sub_connection_t *sub = &tc->sub_conn[conn_idx];
525 sub->timers[timer_id] =
526 tw_timer_start_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index],
527 sub->c_c_index, timer_id, interval);
531 sctp_timer_reset (sctp_connection_t * tc, u8 conn_idx, u8 timer_id)
533 ASSERT (tc->sub_conn[conn_idx].c_thread_index == vlib_get_thread_index ());
534 if (tc->sub_conn[conn_idx].timers[timer_id] == SCTP_TIMER_HANDLE_INVALID)
537 sctp_sub_connection_t *sub = &tc->sub_conn[conn_idx];
539 tw_timer_stop_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index],
540 sub->timers[timer_id]);
541 sub->timers[timer_id] = SCTP_TIMER_HANDLE_INVALID;
545 * Try to cleanup half-open connection
547 * If called from a thread that doesn't own tc, the call won't have any
550 * @param tc - connection to be cleaned up
551 * @return non-zero if cleanup failed.
554 sctp_half_open_connection_cleanup (sctp_connection_t * tc)
556 /* Make sure this is the owning thread */
557 if (tc->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_thread_index !=
558 vlib_get_thread_index ())
560 sctp_timer_reset (tc, MAIN_SCTP_SUB_CONN_IDX, SCTP_TIMER_T1_INIT);
561 sctp_half_open_connection_del (tc);
568 return sizeof (sctp_header_t);
571 always_inline sctp_connection_t *
572 sctp_get_connection_from_transport (transport_connection_t * tconn)
574 ASSERT (tconn != NULL);
576 sctp_sub_connection_t *sub = (sctp_sub_connection_t *) tconn;
579 SCTP_ADV_DBG ("sub == NULL");
580 if (sub->parent == NULL)
581 SCTP_ADV_DBG ("sub->parent == NULL");
583 return (sctp_connection_t *) sub->parent;
589 return sctp_main.time_now[vlib_get_thread_index ()];
592 #define ABS(x) ((x) > 0) ? (x) : -(x);
595 sctp_calculate_rto (sctp_connection_t * sctp_conn, u8 conn_idx)
597 /* See RFC4960, 6.3.1. RTO Calculation */
600 u32 now = sctp_time_now ();
601 u32 prev_ts = sctp_conn->sub_conn[conn_idx].rtt_ts;
602 u32 R = prev_ts - now;
604 if (sctp_conn->sub_conn[conn_idx].RTO == 0) // C1: Let's initialize our RTO
606 sctp_conn->sub_conn[conn_idx].RTO = SCTP_RTO_MIN;
610 if (sctp_conn->sub_conn[conn_idx].RTO == SCTP_RTO_MIN && sctp_conn->sub_conn[conn_idx].SRTT == 0) // C2: First RTT calculation
612 sctp_conn->sub_conn[conn_idx].SRTT = R;
616 RTTVAR = 100e-3; /* 100 ms */
618 sctp_conn->sub_conn[conn_idx].RTTVAR = RTTVAR;
620 else // C3: RTT already exists; let's recalculate
622 RTTVAR = (1 - SCTP_RTO_BETA) * sctp_conn->sub_conn[conn_idx].RTTVAR +
623 SCTP_RTO_BETA * ABS (sctp_conn->sub_conn[conn_idx].SRTT - R);
626 RTTVAR = 100e-3; /* 100 ms */
628 sctp_conn->sub_conn[conn_idx].RTTVAR = RTTVAR;
630 sctp_conn->sub_conn[conn_idx].SRTT =
631 (1 - SCTP_RTO_ALPHA) * sctp_conn->sub_conn[conn_idx].SRTT +
636 sctp_conn->sub_conn[conn_idx].SRTT +
637 4 * sctp_conn->sub_conn[conn_idx].RTTVAR;
638 if (RTO < SCTP_RTO_MIN) // C6
641 if (RTO > SCTP_RTO_MAX) // C7
644 sctp_conn->sub_conn[conn_idx].RTO = RTO;
648 sctp_timer_update (sctp_connection_t * tc, u8 conn_idx, u8 timer_id,
651 ASSERT (tc->sub_conn[conn_idx].connection.thread_index ==
652 vlib_get_thread_index ());
653 sctp_sub_connection_t *sub = &tc->sub_conn[conn_idx];
655 if (tc->sub_conn[conn_idx].timers[timer_id] != SCTP_TIMER_HANDLE_INVALID)
656 tw_timer_stop_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index],
657 sub->timers[timer_id]);
659 tc->sub_conn[conn_idx].timers[timer_id] =
660 tw_timer_start_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index],
661 sub->c_c_index, timer_id, interval);
664 always_inline sctp_connection_t *
665 sctp_listener_get (u32 tli)
667 return pool_elt_at_index (sctp_main.listener_pool, tli);
672 always_inline sctp_connection_t *
673 sctp_connection_get (u32 conn_index, u32 thread_index)
676 (pool_is_free_index (sctp_main.connections[thread_index], conn_index)))
678 return pool_elt_at_index (sctp_main.connections[thread_index], conn_index);
682 sctp_pick_conn_idx_on_chunk (sctp_chunk_type chunk_type)
684 u8 idx = MAIN_SCTP_SUB_CONN_IDX;
697 case OPERATION_ERROR:
702 case SHUTDOWN_COMPLETE:
703 idx = MAIN_SCTP_SUB_CONN_IDX;
709 sctp_pick_conn_idx_on_state (sctp_state_t state)
711 u8 idx = MAIN_SCTP_SUB_CONN_IDX;
715 case SCTP_STATE_CLOSED:
716 case SCTP_STATE_COOKIE_WAIT:
717 case SCTP_STATE_COOKIE_ECHOED:
718 case SCTP_STATE_ESTABLISHED:
719 case SCTP_STATE_SHUTDOWN_PENDING:
720 case SCTP_STATE_SHUTDOWN_SENT:
721 case SCTP_STATE_SHUTDOWN_RECEIVED:
722 case SCTP_STATE_SHUTDOWN_ACK_SENT:
723 idx = MAIN_SCTP_SUB_CONN_IDX;
725 idx = MAIN_SCTP_SUB_CONN_IDX;
731 * Push SCTP header to buffer
733 * @param vm - vlib_main
734 * @param b - buffer to write the header to
735 * @param sp_net - source port net order
736 * @param dp_net - destination port net order
737 * @param sctp_hdr_opts_len - header and options length in bytes
739 * @return - pointer to start of SCTP header
742 vlib_buffer_push_sctp_net_order (vlib_buffer_t * b, u16 sp, u16 dp,
743 u8 sctp_hdr_opts_len)
745 sctp_full_hdr_t *full_hdr;
747 full_hdr = vlib_buffer_push_uninit (b, sctp_hdr_opts_len);
749 full_hdr->hdr.src_port = sp;
750 full_hdr->hdr.dst_port = dp;
751 full_hdr->hdr.checksum = 0;
756 * Push SCTP header to buffer
758 * @param b - buffer to write the header to
759 * @param sp_net - source port net order
760 * @param dp_net - destination port net order
761 * @param sctp_hdr_opts_len - header and options length in bytes
763 * @return - pointer to start of SCTP header
766 vlib_buffer_push_sctp (vlib_buffer_t * b, u16 sp_net, u16 dp_net,
767 u8 sctp_hdr_opts_len)
769 return vlib_buffer_push_sctp_net_order (b, sp_net, dp_net,
774 * fd.io coding-style-patch-verification: ON
777 * eval: (c-set-style "gnu")