1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 *
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
17 *
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35#ifndef _NETINET_SCTP_STRUCTS_H_
36#define _NETINET_SCTP_STRUCTS_H_
37
38#include <netinet/sctp_os.h>
39#include <netinet/sctp_header.h>
40#include <netinet/sctp_auth.h>
41
42struct sctp_timer {
43 sctp_os_timer_t timer;
44
45 int type;
46 /*
47 * Depending on the timer type these will be setup and cast with the
48 * appropriate entity.
49 */
50 void *ep;
51 void *tcb;
52 void *net;
53 void *vnet;
54
55 /* for sanity checking */
56 void *self;
57 uint32_t ticks;
58 uint32_t stopped_from;
59};
60
61struct sctp_foo_stuff {
62 struct sctp_inpcb *inp;
63 uint32_t lineno;
64 uint32_t ticks;
65 int updown;
66};
67
68/*
69 * This is the information we track on each interface that we know about from
70 * the distant end.
71 */
72TAILQ_HEAD(sctpnetlisthead, sctp_nets);
73
74struct sctp_stream_reset_list {
75 TAILQ_ENTRY(sctp_stream_reset_list) next_resp;
76 uint32_t seq;
77 uint32_t tsn;
78 uint32_t number_entries;
79 uint16_t list_of_streams[];
80};
81
82TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list);
83
84/*
85 * Users of the iterator need to malloc a iterator with a call to
86 * sctp_initiate_iterator(inp_func, assoc_func, inp_func, pcb_flags, pcb_features,
87 * asoc_state, void-ptr-arg, uint32-arg, end_func, inp);
88 *
89 * Use the following two defines if you don't care what pcb flags are on the EP
90 * and/or you don't care what state the association is in.
91 *
92 * Note that if you specify an INP as the last argument then ONLY each
93 * association of that single INP will be executed upon. Note that the pcb
94 * flags STILL apply so if the inp you specify has different pcb_flags then
95 * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to
96 * assure the inp you specify gets treated.
97 */
98#define SCTP_PCB_ANY_FLAGS 0x00000000
99#define SCTP_PCB_ANY_FEATURES 0x00000000
100#define SCTP_ASOC_ANY_STATE 0x00000000
101
102typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr,
103 uint32_t val);
104typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val);
105typedef void (*end_func) (void *ptr, uint32_t val);
106
107#if defined(SCTP_MCORE_INPUT) && defined(SMP)
108/* whats on the mcore control struct */
109struct sctp_mcore_queue {
110 TAILQ_ENTRY(sctp_mcore_queue) next;
111 struct vnet *vn;
112 struct mbuf *m;
113 int off;
114 int v6;
115};
116
117TAILQ_HEAD(sctp_mcore_qhead, sctp_mcore_queue);
118
119struct sctp_mcore_ctrl {
120 SCTP_PROCESS_STRUCT thread_proc;
121 struct sctp_mcore_qhead que;
122 struct mtx core_mtx;
123 struct mtx que_mtx;
124 int running;
125 int cpuid;
126};
127#endif
128
129/* This struct is here to cut out the compatiabilty
130 * pad that bulks up both the inp and stcb. The non
131 * pad portion MUST stay in complete sync with
132 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added
133 * this must be done here too.
134 */
135struct sctp_nonpad_sndrcvinfo {
136 uint16_t sinfo_stream;
137 uint16_t sinfo_ssn;
138 uint16_t sinfo_flags;
139 uint32_t sinfo_ppid;
140 uint32_t sinfo_context;
141 uint32_t sinfo_timetolive;
142 uint32_t sinfo_tsn;
143 uint32_t sinfo_cumtsn;
144 sctp_assoc_t sinfo_assoc_id;
145 uint16_t sinfo_keynumber;
146 uint16_t sinfo_keynumber_valid;
147};
148
149struct sctp_iterator {
150 TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr;
151 struct vnet *vn;
152 struct sctp_timer tmr;
153 struct sctp_inpcb *inp; /* current endpoint */
154 struct sctp_tcb *stcb; /* current* assoc */
155 struct sctp_inpcb *next_inp; /* special hook to skip to */
156 asoc_func function_assoc; /* per assoc function */
157 inp_func function_inp; /* per endpoint function */
158 inp_func function_inp_end; /* end INP function */
159 end_func function_atend; /* iterator completion function */
160 void *pointer; /* pointer for apply func to use */
161 uint32_t val; /* value for apply func to use */
162 uint32_t pcb_flags; /* endpoint flags being checked */
163 uint32_t pcb_features; /* endpoint features being checked */
164 uint32_t asoc_state; /* assoc state being checked */
165 uint32_t iterator_flags;
166 uint8_t no_chunk_output;
167 uint8_t done_current_ep;
168};
169
170/* iterator_flags values */
171#define SCTP_ITERATOR_DO_ALL_INP 0x00000001
172#define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002
173
174TAILQ_HEAD(sctpiterators, sctp_iterator);
175
176struct sctp_copy_all {
177 struct sctp_inpcb *inp; /* ep */
178 struct mbuf *m;
179 struct sctp_nonpad_sndrcvinfo sndrcv;
180 ssize_t sndlen;
181 int cnt_sent;
182 int cnt_failed;
183};
184
185struct sctp_asconf_iterator {
186 struct sctpladdr list_of_work;
187 int cnt;
188};
189
190struct iterator_control {
191 struct mtx ipi_iterator_wq_mtx;
192 struct mtx it_mtx;
193 SCTP_PROCESS_STRUCT thread_proc;
194 struct sctpiterators iteratorhead;
195 struct sctp_iterator *cur_it;
196 uint32_t iterator_running;
197 uint32_t iterator_flags;
198};
199#define SCTP_ITERATOR_STOP_CUR_IT 0x00000004
200#define SCTP_ITERATOR_STOP_CUR_INP 0x00000008
201
202struct sctp_net_route {
203 struct nhop_object *ro_nh;
204 struct llentry *ro_lle;
205 char *ro_prepend;
206 uint16_t ro_plen;
207 uint16_t ro_flags;
208 uint16_t ro_mtu;
209 uint16_t spare;
210 union sctp_sockstore _l_addr; /* remote peer addr */
211 struct sctp_ifa *_s_addr; /* our selected src addr */
212};
213
214struct htcp {
215 uint16_t alpha; /* Fixed point arith, << 7 */
216 uint8_t beta; /* Fixed point arith, << 7 */
217 uint8_t modeswitch; /* Delay modeswitch until we had at least one
218 * congestion event */
219 uint32_t last_cong; /* Time since last congestion event end */
220 uint32_t undo_last_cong;
221 uint16_t bytes_acked;
222 uint32_t bytecount;
223 uint32_t minRTT;
224 uint32_t maxRTT;
225
226 uint32_t undo_maxRTT;
227 uint32_t undo_old_maxB;
228
229 /* Bandwidth estimation */
230 uint32_t minB;
231 uint32_t maxB;
232 uint32_t old_maxB;
233 uint32_t Bi;
234 uint32_t lasttime;
235};
236
237struct rtcc_cc {
238 struct timeval tls; /* The time we started the sending */
239 uint64_t lbw; /* Our last estimated bw */
240 uint64_t lbw_rtt; /* RTT at bw estimate */
241 uint64_t bw_bytes; /* The total bytes since this sending began */
242 uint64_t bw_tot_time; /* The total time since sending began */
243 uint64_t new_tot_time; /* temp holding the new value */
244 uint64_t bw_bytes_at_last_rttc; /* What bw_bytes was at last rtt calc */
245 uint32_t cwnd_at_bw_set; /* Cwnd at last bw saved - lbw */
246 uint32_t vol_reduce; /* cnt of voluntary reductions */
247 uint16_t steady_step; /* The number required to be in steady state */
248 uint16_t step_cnt; /* The current number */
249 uint8_t ret_from_eq; /* When all things are equal what do I return
250 * 0/1 - 1 no cc advance */
251 uint8_t use_dccc_ecn; /* Flag to enable DCCC ECN */
252 uint8_t tls_needs_set; /* Flag to indicate we need to set tls 0 or 1
253 * means set at send 2 not */
254 uint8_t last_step_state; /* Last state if steady state stepdown
255 * is on */
256 uint8_t rtt_set_this_sack; /* Flag saying this sack had RTT calc
257 * on it */
258 uint8_t last_inst_ind; /* Last saved inst indication */
259};
260
261struct sctp_nets {
262 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */
263
264 /*
265 * Things on the top half may be able to be split into a common
266 * structure shared by all.
267 */
268 struct sctp_timer pmtu_timer;
269 struct sctp_timer hb_timer;
270
271 /*
272 * The following two in combination equate to a route entry for v6
273 * or v4.
274 */
275 struct sctp_net_route ro;
276
277 /* mtu discovered so far */
278 uint32_t mtu;
279 uint32_t ssthresh; /* not sure about this one for split */
280 uint32_t last_cwr_tsn;
281 uint32_t cwr_window_tsn;
282 uint32_t ecn_ce_pkt_cnt;
283 uint32_t lost_cnt;
284 /* smoothed average things for RTT and RTO itself */
285 int lastsa;
286 int lastsv;
287 uint64_t rtt; /* last measured rtt value in us */
288 uint32_t RTO;
289
290 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */
291 struct sctp_timer rxt_timer;
292
293 /* last time in seconds I sent to it */
294 struct timeval last_sent_time;
295 union cc_control_data {
296 struct htcp htcp_ca; /* JRS - struct used in HTCP algorithm */
297 struct rtcc_cc rtcc; /* rtcc module cc stuff */
298 } cc_mod;
299 int ref_count;
300
301 /* Congestion stats per destination */
302 /*
303 * flight size variables and such, sorry Vern, I could not avoid
304 * this if I wanted performance :>
305 */
306 uint32_t flight_size;
307 uint32_t cwnd; /* actual cwnd */
308 uint32_t prev_cwnd; /* cwnd before any processing */
309 uint32_t ecn_prev_cwnd; /* ECN prev cwnd at first ecn_echo seen in new
310 * window */
311 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */
312 /* tracking variables to avoid the aloc/free in sack processing */
313 unsigned int net_ack;
314 unsigned int net_ack2;
315
316 /*
317 * JRS - 5/8/07 - Variable to track last time a destination was
318 * active for CMT PF
319 */
320 uint32_t last_active;
321
322 /*
323 * CMT variables (iyengar@cis.udel.edu)
324 */
325 uint32_t this_sack_highest_newack; /* tracks highest TSN newly
326 * acked for a given dest in
327 * the current SACK. Used in
328 * SFR and HTNA algos */
329 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected
330 * pseudo-cumack for this destination */
331 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next
332 * expected pseudo-cumack for this
333 * destination */
334
335 /* CMT fast recovery variables */
336 uint32_t fast_recovery_tsn;
337 uint32_t heartbeat_random1;
338 uint32_t heartbeat_random2;
339#ifdef INET6
340 uint32_t flowlabel;
341#endif
342 uint8_t dscp;
343
344 struct timeval start_time; /* time when this net was created */
345 uint32_t marked_retrans; /* number or DATA chunks marked for
346 * timer based retransmissions */
347 uint32_t marked_fastretrans;
348 uint32_t heart_beat_delay; /* Heart Beat delay in ms */
349
350 /* if this guy is ok or not ... status */
351 uint16_t dest_state;
352 /* number of timeouts to consider the destination unreachable */
353 uint16_t failure_threshold;
354 /* number of timeouts to consider the destination potentially failed */
355 uint16_t pf_threshold;
356 /* error stats on the destination */
357 uint16_t error_count;
358 /* UDP port number in case of UDP tunneling */
359 uint16_t port;
360
361 uint8_t fast_retran_loss_recovery;
362 uint8_t will_exit_fast_recovery;
363 /* Flags that probably can be combined into dest_state */
364 uint8_t fast_retran_ip; /* fast retransmit in progress */
365 uint8_t hb_responded;
366 uint8_t saw_newack; /* CMT's SFR algorithm flag */
367 uint8_t src_addr_selected; /* if we split we move */
368 uint8_t indx_of_eligible_next_to_use;
369 uint8_t addr_is_local; /* its a local address (if known) could move
370 * in split */
371
372 /*
373 * CMT variables (iyengar@cis.udel.edu)
374 */
375 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to
376 * find a new pseudocumack. This flag
377 * is set after a new pseudo-cumack
378 * has been received and indicates
379 * that the sender should find the
380 * next pseudo-cumack expected for
381 * this destination */
382 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to
383 * find a new rtx-pseudocumack. This
384 * flag is set after a new
385 * rtx-pseudo-cumack has been received
386 * and indicates that the sender
387 * should find the next
388 * rtx-pseudo-cumack expected for this
389 * destination */
390 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to
391 * indicate if a new pseudo-cumack or
392 * rtx-pseudo-cumack has been received */
393 uint8_t window_probe; /* Doing a window probe? */
394 uint8_t RTO_measured; /* Have we done the first measure */
395 uint8_t last_hs_used; /* index into the last HS table entry we used */
396 uint8_t lan_type;
397 uint8_t rto_needed;
398 uint32_t flowid;
399 uint8_t flowtype;
400};
401
402struct sctp_data_chunkrec {
403 uint32_t tsn; /* the TSN of this transmit */
404 uint32_t mid; /* the message identifier of this transmit */
405 uint16_t sid; /* the stream number of this guy */
406 uint32_t ppid;
407 uint32_t context; /* from send */
408 uint32_t cwnd_at_send;
409 /*
410 * part of the Highest sacked algorithm to be able to stroke counts
411 * on ones that are FR'd.
412 */
413 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */
414 struct timeval timetodrop; /* time we drop it from queue */
415 uint32_t fsn; /* Fragment Sequence Number */
416 uint8_t doing_fast_retransmit;
417 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for
418 * outbound holds sending flags for PR-SCTP. */
419 uint8_t state_flags;
420 uint8_t chunk_was_revoked;
421 uint8_t fwd_tsn_cnt;
422};
423
424TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk);
425
426/* The lower byte is used to enumerate PR_SCTP policies */
427#define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL
428#define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF
429#define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX
430
431/* The upper byte is used as a bit mask */
432#define CHUNK_FLAGS_FRAGMENT_OK 0x0100
433
434struct chk_id {
435 uint8_t id;
436 uint8_t can_take_data;
437};
438
439struct sctp_tmit_chunk {
440 union {
441 struct sctp_data_chunkrec data;
442 struct chk_id chunk_id;
443 } rec;
444 struct sctp_association *asoc; /* bp to asoc this belongs to */
445 struct timeval sent_rcv_time; /* filled in if RTT being calculated */
446 struct mbuf *data; /* pointer to mbuf chain of data */
447 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */
448 struct sctp_nets *whoTo;
449 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */
450 int32_t sent; /* the send status */
451 uint16_t snd_count; /* number of times I sent */
452 uint16_t flags; /* flags, such as FRAGMENT_OK */
453 uint16_t send_size;
454 uint16_t book_size;
455 uint16_t mbcnt;
456 uint16_t auth_keyid;
457 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */
458 uint8_t pad_inplace;
459 uint8_t do_rtt;
460 uint8_t book_size_scale;
461 uint8_t no_fr_allowed;
462 uint8_t copy_by_ref;
463 uint8_t window_probe;
464};
465
466struct sctp_queued_to_read { /* sinfo structure Pluse more */
467 uint16_t sinfo_stream; /* off the wire */
468 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for
469 * EOR */
470 uint32_t sinfo_ppid; /* off the wire */
471 uint32_t sinfo_context; /* pick this up from assoc def context? */
472 uint32_t sinfo_timetolive; /* not used by kernel */
473 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */
474 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */
475 sctp_assoc_t sinfo_assoc_id; /* our assoc id */
476 /* Non sinfo stuff */
477 uint32_t mid; /* Fragment Index */
478 uint32_t length; /* length of data */
479 uint32_t held_length; /* length held in sb */
480 uint32_t top_fsn; /* Highest FSN in queue */
481 uint32_t fsn_included; /* Highest FSN in *data portion */
482 struct sctp_nets *whoFrom; /* where it came from */
483 struct mbuf *data; /* front of the mbuf chain of data with
484 * PKT_HDR */
485 struct mbuf *tail_mbuf; /* used for multi-part data */
486 struct mbuf *aux_data; /* used to hold/cache control if o/s does not
487 * take it from us */
488 struct sctp_tcb *stcb; /* assoc, used for window update */
489 TAILQ_ENTRY(sctp_queued_to_read) next;
490 TAILQ_ENTRY(sctp_queued_to_read) next_instrm;
491 struct sctpchunk_listhead reasm;
492 uint16_t port_from;
493 uint16_t spec_flags; /* Flags to hold the notification field */
494 uint8_t do_not_ref_stcb;
495 uint8_t end_added;
496 uint8_t pdapi_aborted;
497 uint8_t pdapi_started;
498 uint8_t some_taken;
499 uint8_t last_frag_seen;
500 uint8_t first_frag_seen;
501 uint8_t on_read_q;
502 uint8_t on_strm_q;
503};
504
505#define SCTP_ON_ORDERED 1
506#define SCTP_ON_UNORDERED 2
507
508/* This data structure will be on the outbound
509 * stream queues. Data will be pulled off from
510 * the front of the mbuf data and chunk-ified
511 * by the output routines. We will custom
512 * fit every chunk we pull to the send/sent
513 * queue to make up the next full packet
514 * if we can. An entry cannot be removed
515 * from the stream_out queue until
516 * the msg_is_complete flag is set. This
517 * means at times data/tail_mbuf MIGHT
518 * be NULL.. If that occurs it happens
519 * for one of two reasons. Either the user
520 * is blocked on a send() call and has not
521 * awoken to copy more data down... OR
522 * the user is in the explict MSG_EOR mode
523 * and wrote some data, but has not completed
524 * sending.
525 * ss_next and scheduled are only used by the FCFS stream scheduler.
526 */
527struct sctp_stream_queue_pending {
528 struct mbuf *data;
529 struct mbuf *tail_mbuf;
530 struct timeval ts;
531 struct sctp_nets *net;
532 TAILQ_ENTRY(sctp_stream_queue_pending) next;
533 TAILQ_ENTRY(sctp_stream_queue_pending) ss_next;
534 uint32_t fsn;
535 uint32_t length;
536 uint32_t timetolive;
537 uint32_t ppid;
538 uint32_t context;
539 uint16_t sinfo_flags;
540 uint16_t sid;
541 uint16_t act_flags;
542 uint16_t auth_keyid;
543 uint8_t holds_key_ref;
544 uint8_t msg_is_complete;
545 uint8_t some_taken;
546 uint8_t sender_all_done;
547 uint8_t put_last_out;
548 uint8_t discard_rest;
549 uint8_t processing;
550 bool scheduled;
551};
552
553/*
554 * this struct contains info that is used to track inbound stream data and
555 * help with ordering.
556 */
557TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in);
558struct sctp_stream_in {
559 struct sctp_readhead inqueue;
560 struct sctp_readhead uno_inqueue;
561 uint32_t last_mid_delivered; /* used for re-order */
562 uint16_t sid;
563 uint8_t delivery_started;
564 uint8_t pd_api_started;
565};
566
567TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out);
568TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending);
569
570/*
571 * This union holds all data necessary for
572 * different stream schedulers.
573 */
574struct scheduling_data {
575 struct sctp_stream_out *locked_on_sending;
576 /* circular looking for output selection */
577 struct sctp_stream_out *last_out_stream;
578 union {
579 struct sctpwheel_listhead wheel;
580 struct sctplist_listhead list;
581 } out;
582};
583
584/* Round-robin schedulers */
585struct ss_rr {
586 /* next link in wheel */
587 TAILQ_ENTRY(sctp_stream_out) next_spoke;
588};
589
590/* Priority scheduler */
591struct ss_prio {
592 /* next link in wheel */
593 TAILQ_ENTRY(sctp_stream_out) next_spoke;
594 /* priority id */
595 uint16_t priority;
596};
597
598/* Fair Bandwidth scheduler */
599struct ss_fb {
600 /* next link in wheel */
601 TAILQ_ENTRY(sctp_stream_out) next_spoke;
602 /* stores message size */
603 int32_t rounds;
604};
605
606/*
607 * This union holds all parameters per stream
608 * necessary for different stream schedulers.
609 */
610struct scheduling_parameters {
611 union {
612 struct ss_rr rr;
613 struct ss_prio prio;
614 struct ss_fb fb;
615 } ss;
616 bool scheduled;
617};
618
619/* States for outgoing streams */
620#define SCTP_STREAM_CLOSED 0x00
621#define SCTP_STREAM_OPENING 0x01
622#define SCTP_STREAM_OPEN 0x02
623#define SCTP_STREAM_RESET_PENDING 0x03
624#define SCTP_STREAM_RESET_IN_FLIGHT 0x04
625
626/* This struct is used to track the traffic on outbound streams */
627struct sctp_stream_out {
628 struct sctp_streamhead outqueue;
629 struct scheduling_parameters ss_params;
630 uint32_t chunks_on_queues; /* send queue and sent queue */
631#if defined(SCTP_DETAILED_STR_STATS)
632 uint32_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1];
633 uint32_t abandoned_sent[SCTP_PR_SCTP_MAX + 1];
634#else
635 /* Only the aggregation */
636 uint32_t abandoned_unsent[1];
637 uint32_t abandoned_sent[1];
638#endif
639 /*
640 * For associations using DATA chunks, the lower 16-bit of
641 * next_mid_ordered are used as the next SSN.
642 */
643 uint32_t next_mid_ordered;
644 uint32_t next_mid_unordered;
645 uint16_t sid;
646 uint8_t last_msg_incomplete;
647 uint8_t state;
648};
649
650#define SCTP_MAX_STREAMS_AT_ONCE_RESET 200
651
652/* used to keep track of the addresses yet to try to add/delete */
653TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr);
654struct sctp_asconf_addr {
655 TAILQ_ENTRY(sctp_asconf_addr) next;
656 struct sctp_asconf_addr_param ap;
657 struct sctp_ifa *ifa; /* save the ifa for add/del ip */
658 uint8_t sent; /* has this been sent yet? */
659 uint8_t special_del; /* not to be used in lookup */
660};
661
662struct sctp_scoping {
663 uint8_t ipv4_addr_legal;
664 uint8_t ipv6_addr_legal;
665 uint8_t loopback_scope;
666 uint8_t ipv4_local_scope;
667 uint8_t local_scope;
668 uint8_t site_scope;
669};
670
671#define SCTP_TSN_LOG_SIZE 40
672
673struct sctp_tsn_log {
674 void *stcb;
675 uint32_t tsn;
676 uint32_t seq;
677 uint16_t strm;
678 uint16_t sz;
679 uint16_t flgs;
680 uint16_t in_pos;
681 uint16_t in_out;
682 uint16_t resv;
683};
684
685#define SCTP_FS_SPEC_LOG_SIZE 200
686struct sctp_fs_spec_log {
687 uint32_t sent;
688 uint32_t total_flight;
689 uint32_t tsn;
690 uint16_t book;
691 uint8_t incr;
692 uint8_t decr;
693};
694
695/*
696 * JRS - Structure to hold function pointers to the functions responsible
697 * for congestion control.
698 */
699
700struct sctp_cc_functions {
701 void (*sctp_set_initial_cc_param) (struct sctp_tcb *stcb, struct sctp_nets *net);
702 void (*sctp_cwnd_update_after_sack) (struct sctp_tcb *stcb,
703 struct sctp_association *asoc,
704 int accum_moved, int reneged_all, int will_exit);
705 void (*sctp_cwnd_update_exit_pf) (struct sctp_tcb *stcb, struct sctp_nets *net);
706 void (*sctp_cwnd_update_after_fr) (struct sctp_tcb *stcb,
707 struct sctp_association *asoc);
708 void (*sctp_cwnd_update_after_timeout) (struct sctp_tcb *stcb,
709 struct sctp_nets *net);
710 void (*sctp_cwnd_update_after_ecn_echo) (struct sctp_tcb *stcb,
711 struct sctp_nets *net, int in_window, int num_pkt_lost);
712 void (*sctp_cwnd_update_after_packet_dropped) (struct sctp_tcb *stcb,
713 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp,
714 uint32_t *bottle_bw, uint32_t *on_queue);
715 void (*sctp_cwnd_update_after_output) (struct sctp_tcb *stcb,
716 struct sctp_nets *net, int burst_limit);
717 void (*sctp_cwnd_update_packet_transmitted) (struct sctp_tcb *stcb,
718 struct sctp_nets *net);
719 void (*sctp_cwnd_update_tsn_acknowledged) (struct sctp_nets *net,
720 struct sctp_tmit_chunk *);
721 void (*sctp_cwnd_new_transmission_begins) (struct sctp_tcb *stcb,
722 struct sctp_nets *net);
723 void (*sctp_cwnd_prepare_net_for_sack) (struct sctp_tcb *stcb,
724 struct sctp_nets *net);
725 int (*sctp_cwnd_socket_option) (struct sctp_tcb *stcb, int set, struct sctp_cc_option *);
726 void (*sctp_rtt_calculated) (struct sctp_tcb *, struct sctp_nets *, struct timeval *);
727};
728
729/*
730 * RS - Structure to hold function pointers to the functions responsible
731 * for stream scheduling.
732 */
733struct sctp_ss_functions {
734 void (*sctp_ss_init) (struct sctp_tcb *stcb, struct sctp_association *asoc);
735 void (*sctp_ss_clear) (struct sctp_tcb *stcb, struct sctp_association *asoc,
736 bool clear_values);
737 void (*sctp_ss_init_stream) (struct sctp_tcb *stcb, struct sctp_stream_out *strq, struct sctp_stream_out *with_strq);
738 void (*sctp_ss_add_to_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc,
739 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp);
740 bool (*sctp_ss_is_empty) (struct sctp_tcb *stcb, struct sctp_association *asoc);
741 void (*sctp_ss_remove_from_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc,
742 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp);
743struct sctp_stream_out *(*sctp_ss_select_stream) (struct sctp_tcb *stcb,
744 struct sctp_nets *net, struct sctp_association *asoc);
745 void (*sctp_ss_scheduled) (struct sctp_tcb *stcb, struct sctp_nets *net,
746 struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much);
747 void (*sctp_ss_packet_done) (struct sctp_tcb *stcb, struct sctp_nets *net,
748 struct sctp_association *asoc);
749 int (*sctp_ss_get_value) (struct sctp_tcb *stcb, struct sctp_association *asoc,
750 struct sctp_stream_out *strq, uint16_t *value);
751 int (*sctp_ss_set_value) (struct sctp_tcb *stcb, struct sctp_association *asoc,
752 struct sctp_stream_out *strq, uint16_t value);
753 bool (*sctp_ss_is_user_msgs_incomplete) (struct sctp_tcb *stcb, struct sctp_association *asoc);
754};
755
756/* used to save ASCONF chunks for retransmission */
757TAILQ_HEAD(sctp_asconf_head, sctp_asconf);
758struct sctp_asconf {
759 TAILQ_ENTRY(sctp_asconf) next;
760 uint32_t serial_number;
761 uint16_t snd_count;
762 struct mbuf *data;
763 uint16_t len;
764};
765
766/* used to save ASCONF-ACK chunks for retransmission */
767TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack);
768struct sctp_asconf_ack {
769 TAILQ_ENTRY(sctp_asconf_ack) next;
770 uint32_t serial_number;
771 struct sctp_nets *last_sent_to;
772 struct mbuf *data;
773 uint16_t len;
774};
775
776/*
777 * Here we have information about each individual association that we track.
778 * We probably in production would be more dynamic. But for ease of
779 * implementation we will have a fixed array that we hunt for in a linear
780 * fashion.
781 */
782struct sctp_association {
783 /* association state */
784 int state;
785
786 /* queue of pending addrs to add/delete */
787 struct sctp_asconf_addrhead asconf_queue;
788
789 struct timeval time_entered; /* time we entered state */
790 struct timeval time_last_rcvd;
791 struct timeval time_last_sent;
792 struct timeval time_last_sat_advance;
793 struct sctp_nonpad_sndrcvinfo def_send;
794
795 /* timers and such */
796 struct sctp_timer dack_timer; /* Delayed ack timer */
797 struct sctp_timer asconf_timer; /* asconf */
798 struct sctp_timer strreset_timer; /* stream reset */
799 struct sctp_timer shut_guard_timer; /* shutdown guard */
800 struct sctp_timer autoclose_timer; /* automatic close timer */
801 struct sctp_timer delete_prim_timer; /* deleting primary dst */
802
803 /* list of restricted local addresses */
804 struct sctpladdr sctp_restricted_addrs;
805
806 /* last local address pending deletion (waiting for an address add) */
807 struct sctp_ifa *asconf_addr_del_pending;
808 /* Deleted primary destination (used to stop timer) */
809 struct sctp_nets *deleted_primary;
810
811 struct sctpnetlisthead nets; /* remote address list */
812
813 /* Free chunk list */
814 struct sctpchunk_listhead free_chunks;
815
816 /* Control chunk queue */
817 struct sctpchunk_listhead control_send_queue;
818
819 /* ASCONF chunk queue */
820 struct sctpchunk_listhead asconf_send_queue;
821
822 /*
823 * Once a TSN hits the wire it is moved to the sent_queue. We
824 * maintain two counts here (don't know if any but retran_cnt is
825 * needed). The idea is that the sent_queue_retran_cnt reflects how
826 * many chunks have been marked for retranmission by either T3-rxt
827 * or FR.
828 */
829 struct sctpchunk_listhead sent_queue;
830 struct sctpchunk_listhead send_queue;
831
832 /* Scheduling queues */
833 struct scheduling_data ss_data;
834
835 /* If an iterator is looking at me, this is it */
836 struct sctp_iterator *stcb_starting_point_for_iterator;
837
838 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */
839 struct sctp_asconf_ackhead asconf_ack_sent;
840
841 /*
842 * pointer to last stream reset queued to control queue by us with
843 * requests.
844 */
845 struct sctp_tmit_chunk *str_reset;
846 /*
847 * if Source Address Selection happening, this will rotate through
848 * the link list.
849 */
850 struct sctp_laddr *last_used_address;
851
852 /* stream arrays */
853 struct sctp_stream_in *strmin;
854 struct sctp_stream_out *strmout;
855 uint8_t *mapping_array;
856 /* primary destination to use */
857 struct sctp_nets *primary_destination;
858 struct sctp_nets *alternate; /* If primary is down or PF */
859 /* For CMT */
860 struct sctp_nets *last_net_cmt_send_started;
861 /* last place I got a data chunk from */
862 struct sctp_nets *last_data_chunk_from;
863 /* last place I got a control from */
864 struct sctp_nets *last_control_chunk_from;
865
866 /*
867 * wait to the point the cum-ack passes req->send_reset_at_tsn for
868 * any req on the list.
869 */
870 struct sctp_resethead resetHead;
871
872 /* queue of chunks waiting to be sent into the local stack */
873 struct sctp_readhead pending_reply_queue;
874
875 /* JRS - the congestion control functions are in this struct */
876 struct sctp_cc_functions cc_functions;
877 /*
878 * JRS - value to store the currently loaded congestion control
879 * module
880 */
881 uint32_t congestion_control_module;
882 /* RS - the stream scheduling functions are in this struct */
883 struct sctp_ss_functions ss_functions;
884 /* RS - value to store the currently loaded stream scheduling module */
885 uint32_t stream_scheduling_module;
886
887 uint32_t vrf_id;
888 uint32_t cookie_preserve_req;
889 /* ASCONF next seq I am sending out, inits at init-tsn */
890 uint32_t asconf_seq_out;
891 uint32_t asconf_seq_out_acked;
892 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */
893 uint32_t asconf_seq_in;
894
895 /* next seq I am sending in str reset messages */
896 uint32_t str_reset_seq_out;
897 /* next seq I am expecting in str reset messages */
898 uint32_t str_reset_seq_in;
899
900 /* various verification tag information */
901 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited
902 * by remote end, and I have unlocked this
903 * will be regenerated to a new random value. */
904 uint32_t peer_vtag; /* The peers last tag */
905
906 uint32_t my_vtag_nonce;
907 uint32_t peer_vtag_nonce;
908
909 uint32_t assoc_id;
910
911 /* This is the SCTP fragmentation threshold */
912 uint32_t smallest_mtu;
913
914 /*
915 * Special hook for Fast retransmit, allows us to track the highest
916 * TSN that is NEW in this SACK if gap ack blocks are present.
917 */
918 uint32_t this_sack_highest_gap;
919
920 /*
921 * The highest consecutive TSN that has been acked by peer on my
922 * sends
923 */
924 uint32_t last_acked_seq;
925
926 /* The next TSN that I will use in sending. */
927 uint32_t sending_seq;
928
929 /* Original seq number I used ??questionable to keep?? */
930 uint32_t init_seq_number;
931
932 /* The Advanced Peer Ack Point, as required by the PR-SCTP */
933 /* (A1 in Section 4.2) */
934 uint32_t advanced_peer_ack_point;
935
936 /*
937 * The highest consequetive TSN at the bottom of the mapping array
938 * (for his sends).
939 */
940 uint32_t cumulative_tsn;
941 /*
942 * Used to track the mapping array and its offset bits. This MAY be
943 * lower then cumulative_tsn.
944 */
945 uint32_t mapping_array_base_tsn;
946 /*
947 * used to track highest TSN we have received and is listed in the
948 * mapping array.
949 */
950 uint32_t highest_tsn_inside_map;
951
952 /* EY - new NR variables used for nr_sack based on mapping_array */
953 uint8_t *nr_mapping_array;
954 uint32_t highest_tsn_inside_nr_map;
955
956 uint32_t fast_recovery_tsn;
957 uint32_t sat_t3_recovery_tsn;
958 uint32_t tsn_last_delivered;
959 uint32_t tsn_of_pdapi_last_delivered;
960 uint32_t pdapi_ppid;
961 uint32_t context;
962 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS];
963 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS];
964 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS];
965#ifdef SCTP_ASOCLOG_OF_TSNS
966 /*
967 * special log - This adds considerable size to the asoc, but
968 * provides a log that you can use to detect problems via kgdb.
969 */
970 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE];
971 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE];
972 uint32_t cumack_log[SCTP_TSN_LOG_SIZE];
973 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE];
974 uint16_t tsn_in_at;
975 uint16_t tsn_out_at;
976 uint16_t tsn_in_wrapped;
977 uint16_t tsn_out_wrapped;
978 uint16_t cumack_log_at;
979 uint16_t cumack_log_atsnt;
980#endif /* SCTP_ASOCLOG_OF_TSNS */
981#ifdef SCTP_FS_SPEC_LOG
982 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE];
983 uint16_t fs_index;
984#endif
985
986 /*
987 * window state information and smallest MTU that I use to bound
988 * segmentation
989 */
990 uint32_t peers_rwnd;
991 uint32_t my_rwnd;
992 uint32_t my_last_reported_rwnd;
993 uint32_t sctp_frag_point;
994
995 uint32_t total_output_queue_size;
996
997 uint32_t sb_cc; /* shadow of sb_cc */
998 uint32_t sb_send_resv; /* amount reserved on a send */
999 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd
1000 * control */
1001#ifdef INET6
1002 uint32_t default_flowlabel;
1003#endif
1004 uint32_t pr_sctp_cnt;
1005 int ctrl_queue_cnt; /* could be removed REM - NO IT CAN'T!! RRS */
1006 /*
1007 * All outbound datagrams queue into this list from the individual
1008 * stream queue. Here they get assigned a TSN and then await
1009 * sending. The stream seq comes when it is first put in the
1010 * individual str queue
1011 */
1012 unsigned int stream_queue_cnt;
1013 unsigned int send_queue_cnt;
1014 unsigned int sent_queue_cnt;
1015 unsigned int sent_queue_cnt_removeable;
1016 /*
1017 * Number on sent queue that are marked for retran until this value
1018 * is 0 we only send one packet of retran'ed data.
1019 */
1020 unsigned int sent_queue_retran_cnt;
1021
1022 unsigned int size_on_reasm_queue;
1023 unsigned int cnt_on_reasm_queue;
1024 unsigned int fwd_tsn_cnt;
1025 /* amount of data (bytes) currently in flight (on all destinations) */
1026 unsigned int total_flight;
1027 /* Total book size in flight */
1028 unsigned int total_flight_count; /* count of chunks used with
1029 * book total */
1030 /* count of destinaton nets and list of destination nets */
1031 unsigned int numnets;
1032
1033 /* Total error count on this association */
1034 unsigned int overall_error_count;
1035
1036 unsigned int cnt_msg_on_sb;
1037
1038 /* All stream count of chunks for delivery */
1039 unsigned int size_on_all_streams;
1040 unsigned int cnt_on_all_streams;
1041
1042 /* Heart Beat delay in ms */
1043 uint32_t heart_beat_delay;
1044
1045 /* autoclose */
1046 uint32_t sctp_autoclose_ticks;
1047
1048 /* how many preopen streams we have */
1049 unsigned int pre_open_streams;
1050
1051 /* How many streams I support coming into me */
1052 unsigned int max_inbound_streams;
1053
1054 /* the cookie life I award for any cookie, in seconds */
1055 uint32_t cookie_life;
1056 /* time to delay acks for */
1057 unsigned int delayed_ack;
1058 unsigned int old_delayed_ack;
1059 unsigned int sack_freq;
1060 unsigned int data_pkts_seen;
1061
1062 unsigned int numduptsns;
1063 int dup_tsns[SCTP_MAX_DUP_TSNS];
1064 uint32_t initial_init_rto_max; /* initial RTO for INIT's */
1065 uint32_t initial_rto; /* initial send RTO */
1066 uint32_t minrto; /* per assoc RTO-MIN */
1067 uint32_t maxrto; /* per assoc RTO-MAX */
1068
1069 /* authentication fields */
1070 sctp_auth_chklist_t *local_auth_chunks;
1071 sctp_auth_chklist_t *peer_auth_chunks;
1072 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */
1073 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */
1074 struct sctp_keyhead shared_keys; /* assoc's shared keys */
1075 sctp_authinfo_t authinfo; /* randoms, cached keys */
1076 /*
1077 * refcnt to block freeing when a sender or receiver is off coping
1078 * user data in.
1079 */
1080 uint32_t refcnt;
1081 uint32_t chunks_on_out_queue; /* total chunks floating around,
1082 * locked by send socket buffer */
1083 uint32_t peers_adaptation;
1084 uint32_t default_mtu;
1085 uint16_t peer_hmac_id; /* peer HMAC id to send */
1086
1087 /*
1088 * Being that we have no bag to collect stale cookies, and that we
1089 * really would not want to anyway.. we will count them in this
1090 * counter. We of course feed them to the pigeons right away (I have
1091 * always thought of pigeons as flying rats).
1092 */
1093 uint16_t stale_cookie_count;
1094
1095 /*
1096 * For the partial delivery API, if up, invoked this is what last
1097 * TSN I delivered
1098 */
1099 uint16_t str_of_pdapi;
1100 uint16_t ssn_of_pdapi;
1101
1102 /* counts of actual built streams. Allocation may be more however */
1103 /* could re-arrange to optimize space here. */
1104 uint16_t streamincnt;
1105 uint16_t streamoutcnt;
1106 uint16_t strm_realoutsize;
1107 uint16_t strm_pending_add_size;
1108 /* my maximum number of retrans of INIT and SEND */
1109 /* copied from SCTP but should be individually setable */
1110 uint16_t max_init_times;
1111 uint16_t max_send_times;
1112
1113 uint16_t def_net_failure;
1114
1115 uint16_t def_net_pf_threshold;
1116
1117 /*
1118 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is
1119 * awaiting ACK
1120 */
1121 uint16_t mapping_array_size;
1122
1123 uint16_t last_strm_seq_delivered;
1124 uint16_t last_strm_no_delivered;
1125
1126 uint16_t last_revoke_count;
1127 int16_t num_send_timers_up;
1128
1129 uint16_t stream_locked_on;
1130 uint16_t ecn_echo_cnt_onq;
1131
1132 uint16_t free_chunk_cnt;
1133 uint8_t stream_locked;
1134 uint8_t authenticated; /* packet authenticated ok */
1135 /*
1136 * This flag indicates that a SACK need to be sent. Initially this
1137 * is 1 to send the first sACK immediately.
1138 */
1139 uint8_t send_sack;
1140
1141 /* max burst of new packets into the network */
1142 uint32_t max_burst;
1143 /* max burst of fast retransmit packets */
1144 uint32_t fr_max_burst;
1145
1146 uint8_t sat_network; /* RTT is in range of sat net or greater */
1147 uint8_t sat_network_lockout; /* lockout code */
1148 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */
1149 /* flag goes on when we are doing a partial delivery api */
1150 uint8_t hb_random_values[4];
1151 uint8_t fragmented_delivery_inprogress;
1152 uint8_t fragment_flags;
1153 uint8_t last_flags_delivered;
1154 uint8_t hb_ect_randombit;
1155 uint8_t hb_random_idx;
1156 uint8_t default_dscp;
1157 uint8_t asconf_del_pending; /* asconf delete last addr pending */
1158 uint8_t trigger_reset;
1159 /*
1160 * This value, plus all other ack'd but above cum-ack is added
1161 * together to cross check against the bit that we have yet to
1162 * define (probably in the SACK). When the cum-ack is updated, this
1163 * sum is updated as well.
1164 */
1165
1166 /* Flags whether an extension is supported or not */
1167 uint8_t ecn_supported;
1168 uint8_t prsctp_supported;
1169 uint8_t auth_supported;
1170 uint8_t asconf_supported;
1171 uint8_t reconfig_supported;
1172 uint8_t nrsack_supported;
1173 uint8_t pktdrop_supported;
1174 uint8_t idata_supported;
1175
1176 /* Zero checksum supported information */
1177 uint8_t rcv_edmid;
1178 uint8_t snd_edmid;
1179
1180 /* Did the peer make the stream config (add out) request */
1181 uint8_t peer_req_out;
1182
1183 uint8_t local_strreset_support;
1184 uint8_t peer_supports_nat;
1185
1186 struct sctp_scoping scope;
1187 /* flags to handle send alternate net tracking */
1188 uint8_t used_alt_asconfack;
1189 uint8_t fast_retran_loss_recovery;
1190 uint8_t sat_t3_loss_recovery;
1191 uint8_t dropped_special_cnt;
1192 uint8_t seen_a_sack_this_pkt;
1193 uint8_t stream_reset_outstanding;
1194 uint8_t stream_reset_out_is_outstanding;
1195 uint8_t delayed_connection;
1196 uint8_t ifp_had_enobuf;
1197 uint8_t saw_sack_with_frags;
1198 uint8_t saw_sack_with_nr_frags;
1199 uint8_t in_asocid_hash;
1200 uint8_t assoc_up_sent;
1201 uint8_t adaptation_needed;
1202 uint8_t adaptation_sent;
1203 /* CMT variables */
1204 uint8_t cmt_dac_pkts_rcvd;
1205 uint8_t sctp_cmt_on_off;
1206 uint8_t iam_blocking;
1207 uint8_t cookie_how[8];
1208 /* JRS 5/21/07 - CMT PF variable */
1209 uint8_t sctp_cmt_pf;
1210 uint8_t use_precise_time;
1211 uint64_t sctp_features;
1212 uint32_t max_cwnd;
1213 uint16_t port; /* remote UDP encapsulation port */
1214 /*
1215 * The mapping array is used to track out of order sequences above
1216 * last_acked_seq. 0 indicates packet missing 1 indicates packet
1217 * rec'd. We slide it up every time we raise last_acked_seq and 0
1218 * trailing locactions out. If I get a TSN above the array
1219 * mappingArraySz, I discard the datagram and let retransmit happen.
1220 */
1221 uint32_t marked_retrans;
1222 uint32_t timoinit;
1223 uint32_t timodata;
1224 uint32_t timosack;
1225 uint32_t timoshutdown;
1226 uint32_t timoheartbeat;
1227 uint32_t timocookie;
1228 uint32_t timoshutdownack;
1229 struct timeval start_time;
1230 struct timeval discontinuity_time;
1231 uint64_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1];
1232 uint64_t abandoned_sent[SCTP_PR_SCTP_MAX + 1];
1233};
1234
1235#endif