1 /*-
2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * a) Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * b) Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the distribution.
15 *
16 * c) Neither the name of Cisco Systems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30 * THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: releng/11.0/sys/netinet/sctp_structs.h 303956 2016-08-11 10:14:03Z tuexen $");
35
36 #ifndef _NETINET_SCTP_STRUCTS_H_
37 #define _NETINET_SCTP_STRUCTS_H_
38
39 #include <netinet/sctp_os.h>
40 #include <netinet/sctp_header.h>
41 #include <netinet/sctp_auth.h>
42
43 struct sctp_timer {
44 sctp_os_timer_t timer;
45
46 int type;
47 /*
48 * Depending on the timer type these will be setup and cast with the
49 * appropriate entity.
50 */
51 void *ep;
52 void *tcb;
53 void *net;
54 void *vnet;
55
56 /* for sanity checking */
57 void *self;
58 uint32_t ticks;
59 uint32_t stopped_from;
60 };
61
62
63 struct sctp_foo_stuff {
64 struct sctp_inpcb *inp;
65 uint32_t lineno;
66 uint32_t ticks;
67 int updown;
68 };
69
70
71 /*
72 * This is the information we track on each interface that we know about from
73 * the distant end.
74 */
75 TAILQ_HEAD(sctpnetlisthead, sctp_nets);
76
77 struct sctp_stream_reset_list {
78 TAILQ_ENTRY(sctp_stream_reset_list) next_resp;
79 uint32_t seq;
80 uint32_t tsn;
81 uint32_t number_entries;
82 uint16_t list_of_streams[];
83 };
84
85 TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list);
86
87 /*
88 * Users of the iterator need to malloc a iterator with a call to
89 * sctp_initiate_iterator(inp_func, assoc_func, inp_func, pcb_flags, pcb_features,
90 * asoc_state, void-ptr-arg, uint32-arg, end_func, inp);
91 *
92 * Use the following two defines if you don't care what pcb flags are on the EP
93 * and/or you don't care what state the association is in.
94 *
95 * Note that if you specify an INP as the last argument then ONLY each
96 * association of that single INP will be executed upon. Note that the pcb
97 * flags STILL apply so if the inp you specify has different pcb_flags then
98 * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to
99 * assure the inp you specify gets treated.
100 */
101 #define SCTP_PCB_ANY_FLAGS 0x00000000
102 #define SCTP_PCB_ANY_FEATURES 0x00000000
103 #define SCTP_ASOC_ANY_STATE 0x00000000
104
105 typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr,
106 uint32_t val);
107 typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val);
108 typedef void (*end_func) (void *ptr, uint32_t val);
109
110 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
111 /* whats on the mcore control struct */
112 struct sctp_mcore_queue {
113 TAILQ_ENTRY(sctp_mcore_queue) next;
114 struct vnet *vn;
115 struct mbuf *m;
116 int off;
117 int v6;
118 };
119
120 TAILQ_HEAD(sctp_mcore_qhead, sctp_mcore_queue);
121
122 struct sctp_mcore_ctrl {
123 SCTP_PROCESS_STRUCT thread_proc;
124 struct sctp_mcore_qhead que;
125 struct mtx core_mtx;
126 struct mtx que_mtx;
127 int running;
128 int cpuid;
129 };
130
131
132 #endif
133
134
135 struct sctp_iterator {
136 TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr;
137 struct vnet *vn;
138 struct sctp_timer tmr;
139 struct sctp_inpcb *inp; /* current endpoint */
140 struct sctp_tcb *stcb; /* current* assoc */
141 struct sctp_inpcb *next_inp; /* special hook to skip to */
142 asoc_func function_assoc; /* per assoc function */
143 inp_func function_inp; /* per endpoint function */
144 inp_func function_inp_end; /* end INP function */
145 end_func function_atend;/* iterator completion function */
146 void *pointer; /* pointer for apply func to use */
147 uint32_t val; /* value for apply func to use */
148 uint32_t pcb_flags; /* endpoint flags being checked */
149 uint32_t pcb_features; /* endpoint features being checked */
150 uint32_t asoc_state; /* assoc state being checked */
151 uint32_t iterator_flags;
152 uint8_t no_chunk_output;
153 uint8_t done_current_ep;
154 };
155
156 /* iterator_flags values */
157 #define SCTP_ITERATOR_DO_ALL_INP 0x00000001
158 #define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002
159
160
161 TAILQ_HEAD(sctpiterators, sctp_iterator);
162
163 struct sctp_copy_all {
164 struct sctp_inpcb *inp; /* ep */
165 struct mbuf *m;
166 struct sctp_sndrcvinfo sndrcv;
167 int sndlen;
168 int cnt_sent;
169 int cnt_failed;
170 };
171
172 struct sctp_asconf_iterator {
173 struct sctpladdr list_of_work;
174 int cnt;
175 };
176
177 struct iterator_control {
178 struct mtx ipi_iterator_wq_mtx;
179 struct mtx it_mtx;
180 SCTP_PROCESS_STRUCT thread_proc;
181 struct sctpiterators iteratorhead;
182 struct sctp_iterator *cur_it;
183 uint32_t iterator_running;
184 uint32_t iterator_flags;
185 };
186
187 #define SCTP_ITERATOR_STOP_CUR_IT 0x00000004
188 #define SCTP_ITERATOR_STOP_CUR_INP 0x00000008
189
190 struct sctp_net_route {
191 sctp_rtentry_t *ro_rt;
192 struct llentry *ro_lle;
193 char *ro_prepend;
194 uint16_t ro_plen;
195 uint16_t ro_flags;
196 uint16_t ro_mtu;
197 uint16_t spare;
198 union sctp_sockstore _l_addr; /* remote peer addr */
199 struct sctp_ifa *_s_addr; /* our selected src addr */
200 };
201
202 struct htcp {
203 uint16_t alpha; /* Fixed point arith, << 7 */
204 uint8_t beta; /* Fixed point arith, << 7 */
205 uint8_t modeswitch; /* Delay modeswitch until we had at least one
206 * congestion event */
207 uint32_t last_cong; /* Time since last congestion event end */
208 uint32_t undo_last_cong;
209 uint16_t bytes_acked;
210 uint32_t bytecount;
211 uint32_t minRTT;
212 uint32_t maxRTT;
213
214 uint32_t undo_maxRTT;
215 uint32_t undo_old_maxB;
216
217 /* Bandwidth estimation */
218 uint32_t minB;
219 uint32_t maxB;
220 uint32_t old_maxB;
221 uint32_t Bi;
222 uint32_t lasttime;
223 };
224
225 struct rtcc_cc {
226 struct timeval tls; /* The time we started the sending */
227 uint64_t lbw; /* Our last estimated bw */
228 uint64_t lbw_rtt; /* RTT at bw estimate */
229 uint64_t bw_bytes; /* The total bytes since this sending began */
230 uint64_t bw_tot_time; /* The total time since sending began */
231 uint64_t new_tot_time; /* temp holding the new value */
232 uint64_t bw_bytes_at_last_rttc; /* What bw_bytes was at last rtt calc */
233 uint32_t cwnd_at_bw_set;/* Cwnd at last bw saved - lbw */
234 uint32_t vol_reduce; /* cnt of voluntary reductions */
235 uint16_t steady_step; /* The number required to be in steady state */
236 uint16_t step_cnt; /* The current number */
237 uint8_t ret_from_eq; /* When all things are equal what do I return
238 * 0/1 - 1 no cc advance */
239 uint8_t use_dccc_ecn; /* Flag to enable DCCC ECN */
240 uint8_t tls_needs_set; /* Flag to indicate we need to set tls 0 or 1
241 * means set at send 2 not */
242 uint8_t last_step_state;/* Last state if steady state stepdown is on */
243 uint8_t rtt_set_this_sack; /* Flag saying this sack had RTT calc
244 * on it */
245 uint8_t last_inst_ind; /* Last saved inst indication */
246 };
247
248
249 struct sctp_nets {
250 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */
251
252 /*
253 * Things on the top half may be able to be split into a common
254 * structure shared by all.
255 */
256 struct sctp_timer pmtu_timer;
257 struct sctp_timer hb_timer;
258
259 /*
260 * The following two in combination equate to a route entry for v6
261 * or v4.
262 */
263 struct sctp_net_route ro;
264
265 /* mtu discovered so far */
266 uint32_t mtu;
267 uint32_t ssthresh; /* not sure about this one for split */
268 uint32_t last_cwr_tsn;
269 uint32_t cwr_window_tsn;
270 uint32_t ecn_ce_pkt_cnt;
271 uint32_t lost_cnt;
272 /* smoothed average things for RTT and RTO itself */
273 int lastsa;
274 int lastsv;
275 uint64_t rtt; /* last measured rtt value in us */
276 unsigned int RTO;
277
278 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */
279 struct sctp_timer rxt_timer;
280
281 /* last time in seconds I sent to it */
282 struct timeval last_sent_time;
283 union cc_control_data {
284 struct htcp htcp_ca; /* JRS - struct used in HTCP algorithm */
285 struct rtcc_cc rtcc; /* rtcc module cc stuff */
286 } cc_mod;
287 int ref_count;
288
289 /* Congestion stats per destination */
290 /*
291 * flight size variables and such, sorry Vern, I could not avoid
292 * this if I wanted performance :>
293 */
294 uint32_t flight_size;
295 uint32_t cwnd; /* actual cwnd */
296 uint32_t prev_cwnd; /* cwnd before any processing */
297 uint32_t ecn_prev_cwnd; /* ECN prev cwnd at first ecn_echo seen in new
298 * window */
299 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */
300 /* tracking variables to avoid the aloc/free in sack processing */
301 unsigned int net_ack;
302 unsigned int net_ack2;
303
304 /*
305 * JRS - 5/8/07 - Variable to track last time a destination was
306 * active for CMT PF
307 */
308 uint32_t last_active;
309
310 /*
311 * CMT variables (iyengar@cis.udel.edu)
312 */
313 uint32_t this_sack_highest_newack; /* tracks highest TSN newly
314 * acked for a given dest in
315 * the current SACK. Used in
316 * SFR and HTNA algos */
317 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected
318 * pseudo-cumack for this destination */
319 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next
320 * expected pseudo-cumack for this
321 * destination */
322
323 /* CMT fast recovery variables */
324 uint32_t fast_recovery_tsn;
325 uint32_t heartbeat_random1;
326 uint32_t heartbeat_random2;
327 #ifdef INET6
328 uint32_t flowlabel;
329 #endif
330 uint8_t dscp;
331
332 struct timeval start_time; /* time when this net was created */
333 uint32_t marked_retrans;/* number or DATA chunks marked for timer
334 * based retransmissions */
335 uint32_t marked_fastretrans;
336 uint32_t heart_beat_delay; /* Heart Beat delay in ms */
337
338 /* if this guy is ok or not ... status */
339 uint16_t dest_state;
340 /* number of timeouts to consider the destination unreachable */
341 uint16_t failure_threshold;
342 /* number of timeouts to consider the destination potentially failed */
343 uint16_t pf_threshold;
344 /* error stats on the destination */
345 uint16_t error_count;
346 /* UDP port number in case of UDP tunneling */
347 uint16_t port;
348
349 uint8_t fast_retran_loss_recovery;
350 uint8_t will_exit_fast_recovery;
351 /* Flags that probably can be combined into dest_state */
352 uint8_t fast_retran_ip; /* fast retransmit in progress */
353 uint8_t hb_responded;
354 uint8_t saw_newack; /* CMT's SFR algorithm flag */
355 uint8_t src_addr_selected; /* if we split we move */
356 uint8_t indx_of_eligible_next_to_use;
357 uint8_t addr_is_local; /* its a local address (if known) could move
358 * in split */
359
360 /*
361 * CMT variables (iyengar@cis.udel.edu)
362 */
363 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to
364 * find a new pseudocumack. This flag
365 * is set after a new pseudo-cumack
366 * has been received and indicates
367 * that the sender should find the
368 * next pseudo-cumack expected for
369 * this destination */
370 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to
371 * find a new rtx-pseudocumack. This
372 * flag is set after a new
373 * rtx-pseudo-cumack has been received
374 * and indicates that the sender
375 * should find the next
376 * rtx-pseudo-cumack expected for this
377 * destination */
378 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to
379 * indicate if a new pseudo-cumack or
380 * rtx-pseudo-cumack has been received */
381 uint8_t window_probe; /* Doing a window probe? */
382 uint8_t RTO_measured; /* Have we done the first measure */
383 uint8_t last_hs_used; /* index into the last HS table entry we used */
384 uint8_t lan_type;
385 uint8_t rto_needed;
386 uint32_t flowid;
387 uint8_t flowtype;
388 };
389
390
391 struct sctp_data_chunkrec {
392 uint32_t TSN_seq; /* the TSN of this transmit */
393 uint32_t stream_seq; /* the stream sequence number of this transmit */
394 uint16_t stream_number; /* the stream number of this guy */
395 uint32_t payloadtype;
396 uint32_t context; /* from send */
397 uint32_t cwnd_at_send;
398 /*
399 * part of the Highest sacked algorithm to be able to stroke counts
400 * on ones that are FR'd.
401 */
402 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */
403 struct timeval timetodrop; /* time we drop it from queue */
404 uint32_t fsn_num; /* Fragment Sequence Number */
405 uint8_t doing_fast_retransmit;
406 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for
407 * outbound holds sending flags for PR-SCTP. */
408 uint8_t state_flags;
409 uint8_t chunk_was_revoked;
410 uint8_t fwd_tsn_cnt;
411 };
412
413 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk);
414
415 /* The lower byte is used to enumerate PR_SCTP policies */
416 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL
417 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF
418 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX
419
420 /* The upper byte is used as a bit mask */
421 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100
422
423 struct chk_id {
424 uint8_t id;
425 uint8_t can_take_data;
426 };
427
428
429 struct sctp_tmit_chunk {
430 union {
431 struct sctp_data_chunkrec data;
432 struct chk_id chunk_id;
433 } rec;
434 struct sctp_association *asoc; /* bp to asoc this belongs to */
435 struct timeval sent_rcv_time; /* filled in if RTT being calculated */
436 struct mbuf *data; /* pointer to mbuf chain of data */
437 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */
438 struct sctp_nets *whoTo;
439 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */
440 int32_t sent; /* the send status */
441 uint16_t snd_count; /* number of times I sent */
442 uint16_t flags; /* flags, such as FRAGMENT_OK */
443 uint16_t send_size;
444 uint16_t book_size;
445 uint16_t mbcnt;
446 uint16_t auth_keyid;
447 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */
448 uint8_t pad_inplace;
449 uint8_t do_rtt;
450 uint8_t book_size_scale;
451 uint8_t no_fr_allowed;
452 uint8_t copy_by_ref;
453 uint8_t window_probe;
454 };
455
456 struct sctp_queued_to_read { /* sinfo structure Pluse more */
457 uint16_t sinfo_stream; /* off the wire */
458 uint32_t sinfo_ssn; /* off the wire */
459 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for
460 * EOR */
461 uint32_t sinfo_ppid; /* off the wire */
462 uint32_t sinfo_context; /* pick this up from assoc def context? */
463 uint32_t sinfo_timetolive; /* not used by kernel */
464 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */
465 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */
466 sctp_assoc_t sinfo_assoc_id; /* our assoc id */
467 /* Non sinfo stuff */
468 uint32_t msg_id; /* Fragment Index */
469 uint32_t length; /* length of data */
470 uint32_t held_length; /* length held in sb */
471 uint32_t top_fsn; /* Highest FSN in queue */
472 uint32_t fsn_included; /* Highest FSN in *data portion */
473 struct sctp_nets *whoFrom; /* where it came from */
474 struct mbuf *data; /* front of the mbuf chain of data with
475 * PKT_HDR */
476 struct mbuf *tail_mbuf; /* used for multi-part data */
477 struct mbuf *aux_data; /* used to hold/cache control if o/s does not
478 * take it from us */
479 struct sctp_tcb *stcb; /* assoc, used for window update */
480 TAILQ_ENTRY(sctp_queued_to_read) next;
481 TAILQ_ENTRY(sctp_queued_to_read) next_instrm;
482 struct sctpchunk_listhead reasm;
483 uint16_t port_from;
484 uint16_t spec_flags; /* Flags to hold the notification field */
485 uint8_t do_not_ref_stcb;
486 uint8_t end_added;
487 uint8_t pdapi_aborted;
488 uint8_t pdapi_started;
489 uint8_t some_taken;
490 uint8_t last_frag_seen;
491 uint8_t first_frag_seen;
492 uint8_t on_read_q;
493 uint8_t on_strm_q;
494 };
495
496 #define SCTP_ON_ORDERED 1
497 #define SCTP_ON_UNORDERED 2
498
499 /* This data structure will be on the outbound
500 * stream queues. Data will be pulled off from
501 * the front of the mbuf data and chunk-ified
502 * by the output routines. We will custom
503 * fit every chunk we pull to the send/sent
504 * queue to make up the next full packet
505 * if we can. An entry cannot be removed
506 * from the stream_out queue until
507 * the msg_is_complete flag is set. This
508 * means at times data/tail_mbuf MIGHT
509 * be NULL.. If that occurs it happens
510 * for one of two reasons. Either the user
511 * is blocked on a send() call and has not
512 * awoken to copy more data down... OR
513 * the user is in the explict MSG_EOR mode
514 * and wrote some data, but has not completed
515 * sending.
516 */
517 struct sctp_stream_queue_pending {
518 struct mbuf *data;
519 struct mbuf *tail_mbuf;
520 struct timeval ts;
521 struct sctp_nets *net;
522 TAILQ_ENTRY(sctp_stream_queue_pending) next;
523 TAILQ_ENTRY(sctp_stream_queue_pending) ss_next;
524 uint32_t fsn;
525 uint32_t length;
526 uint32_t timetolive;
527 uint32_t ppid;
528 uint32_t context;
529 uint16_t sinfo_flags;
530 uint16_t stream;
531 uint16_t act_flags;
532 uint16_t auth_keyid;
533 uint8_t holds_key_ref;
534 uint8_t msg_is_complete;
535 uint8_t some_taken;
536 uint8_t sender_all_done;
537 uint8_t put_last_out;
538 uint8_t discard_rest;
539 };
540
541 /*
542 * this struct contains info that is used to track inbound stream data and
543 * help with ordering.
544 */
545 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in);
546 struct sctp_stream_in {
547 struct sctp_readhead inqueue;
548 struct sctp_readhead uno_inqueue;
549 uint32_t last_sequence_delivered; /* used for re-order */
550 uint16_t stream_no;
551 uint8_t delivery_started;
552 uint8_t pd_api_started;
553 };
554
555 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out);
556 TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending);
557
558
559 /* Round-robin schedulers */
560 struct ss_rr {
561 /* next link in wheel */
562 TAILQ_ENTRY(sctp_stream_out) next_spoke;
563 };
564
565 /* Priority scheduler */
566 struct ss_prio {
567 /* next link in wheel */
568 TAILQ_ENTRY(sctp_stream_out) next_spoke;
569 /* priority id */
570 uint16_t priority;
571 };
572
573 /* Fair Bandwidth scheduler */
574 struct ss_fb {
575 /* next link in wheel */
576 TAILQ_ENTRY(sctp_stream_out) next_spoke;
577 /* stores message size */
578 int32_t rounds;
579 };
580
581 /*
582 * This union holds all data necessary for
583 * different stream schedulers.
584 */
585 struct scheduling_data {
586 struct sctp_stream_out *locked_on_sending;
587 /* circular looking for output selection */
588 struct sctp_stream_out *last_out_stream;
589 union {
590 struct sctpwheel_listhead wheel;
591 struct sctplist_listhead list;
592 } out;
593 };
594
595 /*
596 * This union holds all parameters per stream
597 * necessary for different stream schedulers.
598 */
599 union scheduling_parameters {
600 struct ss_rr rr;
601 struct ss_prio prio;
602 struct ss_fb fb;
603 };
604
605 /* States for outgoing streams */
606 #define SCTP_STREAM_CLOSED 0x00
607 #define SCTP_STREAM_OPENING 0x01
608 #define SCTP_STREAM_OPEN 0x02
609 #define SCTP_STREAM_RESET_PENDING 0x03
610 #define SCTP_STREAM_RESET_IN_FLIGHT 0x04
611
612 #define SCTP_MAX_STREAMS_AT_ONCE_RESET 200
613
614 /* This struct is used to track the traffic on outbound streams */
615 struct sctp_stream_out {
616 struct sctp_streamhead outqueue;
617 union scheduling_parameters ss_params;
618 uint32_t chunks_on_queues; /* send queue and sent queue */
619 #if defined(SCTP_DETAILED_STR_STATS)
620 uint32_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1];
621 uint32_t abandoned_sent[SCTP_PR_SCTP_MAX + 1];
622 #else
623 /* Only the aggregation */
624 uint32_t abandoned_unsent[1];
625 uint32_t abandoned_sent[1];
626 #endif
627 /*
628 * For associations using DATA chunks, the lower 16-bit of
629 * next_mid_ordered are used as the next SSN.
630 */
631 uint32_t next_mid_ordered;
632 uint32_t next_mid_unordered;
633 uint16_t stream_no;
634 uint8_t last_msg_incomplete;
635 uint8_t state;
636 };
637
638 /* used to keep track of the addresses yet to try to add/delete */
639 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr);
640 struct sctp_asconf_addr {
641 TAILQ_ENTRY(sctp_asconf_addr) next;
642 struct sctp_asconf_addr_param ap;
643 struct sctp_ifa *ifa; /* save the ifa for add/del ip */
644 uint8_t sent; /* has this been sent yet? */
645 uint8_t special_del; /* not to be used in lookup */
646 };
647
648 struct sctp_scoping {
649 uint8_t ipv4_addr_legal;
650 uint8_t ipv6_addr_legal;
651 uint8_t loopback_scope;
652 uint8_t ipv4_local_scope;
653 uint8_t local_scope;
654 uint8_t site_scope;
655 };
656
657 #define SCTP_TSN_LOG_SIZE 40
658
659 struct sctp_tsn_log {
660 void *stcb;
661 uint32_t tsn;
662 uint32_t seq;
663 uint16_t strm;
664 uint16_t sz;
665 uint16_t flgs;
666 uint16_t in_pos;
667 uint16_t in_out;
668 uint16_t resv;
669 };
670
671 #define SCTP_FS_SPEC_LOG_SIZE 200
672 struct sctp_fs_spec_log {
673 uint32_t sent;
674 uint32_t total_flight;
675 uint32_t tsn;
676 uint16_t book;
677 uint8_t incr;
678 uint8_t decr;
679 };
680
681 /* This struct is here to cut out the compatiabilty
682 * pad that bulks up both the inp and stcb. The non
683 * pad portion MUST stay in complete sync with
684 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added
685 * this must be done here too.
686 */
687 struct sctp_nonpad_sndrcvinfo {
688 uint16_t sinfo_stream;
689 uint16_t sinfo_ssn;
690 uint16_t sinfo_flags;
691 uint32_t sinfo_ppid;
692 uint32_t sinfo_context;
693 uint32_t sinfo_timetolive;
694 uint32_t sinfo_tsn;
695 uint32_t sinfo_cumtsn;
696 sctp_assoc_t sinfo_assoc_id;
697 uint16_t sinfo_keynumber;
698 uint16_t sinfo_keynumber_valid;
699 };
700
701 /*
702 * JRS - Structure to hold function pointers to the functions responsible
703 * for congestion control.
704 */
705
706 struct sctp_cc_functions {
707 void (*sctp_set_initial_cc_param) (struct sctp_tcb *stcb, struct sctp_nets *net);
708 void (*sctp_cwnd_update_after_sack) (struct sctp_tcb *stcb,
709 struct sctp_association *asoc,
710 int accum_moved, int reneged_all, int will_exit);
711 void (*sctp_cwnd_update_exit_pf) (struct sctp_tcb *stcb, struct sctp_nets *net);
712 void (*sctp_cwnd_update_after_fr) (struct sctp_tcb *stcb,
713 struct sctp_association *asoc);
714 void (*sctp_cwnd_update_after_timeout) (struct sctp_tcb *stcb,
715 struct sctp_nets *net);
716 void (*sctp_cwnd_update_after_ecn_echo) (struct sctp_tcb *stcb,
717 struct sctp_nets *net, int in_window, int num_pkt_lost);
718 void (*sctp_cwnd_update_after_packet_dropped) (struct sctp_tcb *stcb,
719 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp,
720 uint32_t * bottle_bw, uint32_t * on_queue);
721 void (*sctp_cwnd_update_after_output) (struct sctp_tcb *stcb,
722 struct sctp_nets *net, int burst_limit);
723 void (*sctp_cwnd_update_packet_transmitted) (struct sctp_tcb *stcb,
724 struct sctp_nets *net);
725 void (*sctp_cwnd_update_tsn_acknowledged) (struct sctp_nets *net,
726 struct sctp_tmit_chunk *);
727 void (*sctp_cwnd_new_transmission_begins) (struct sctp_tcb *stcb,
728 struct sctp_nets *net);
729 void (*sctp_cwnd_prepare_net_for_sack) (struct sctp_tcb *stcb,
730 struct sctp_nets *net);
731 int (*sctp_cwnd_socket_option) (struct sctp_tcb *stcb, int set, struct sctp_cc_option *);
732 void (*sctp_rtt_calculated) (struct sctp_tcb *, struct sctp_nets *, struct timeval *);
733 };
734
735 /*
736 * RS - Structure to hold function pointers to the functions responsible
737 * for stream scheduling.
738 */
739 struct sctp_ss_functions {
740 void (*sctp_ss_init) (struct sctp_tcb *stcb, struct sctp_association *asoc,
741 int holds_lock);
742 void (*sctp_ss_clear) (struct sctp_tcb *stcb, struct sctp_association *asoc,
743 int clear_values, int holds_lock);
744 void (*sctp_ss_init_stream) (struct sctp_tcb *stcb, struct sctp_stream_out *strq, struct sctp_stream_out *with_strq);
745 void (*sctp_ss_add_to_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc,
746 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock);
747 int (*sctp_ss_is_empty) (struct sctp_tcb *stcb, struct sctp_association *asoc);
748 void (*sctp_ss_remove_from_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc,
749 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock);
750 struct sctp_stream_out *(*sctp_ss_select_stream) (struct sctp_tcb *stcb,
751 struct sctp_nets *net, struct sctp_association *asoc);
752 void (*sctp_ss_scheduled) (struct sctp_tcb *stcb, struct sctp_nets *net,
753 struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much);
754 void (*sctp_ss_packet_done) (struct sctp_tcb *stcb, struct sctp_nets *net,
755 struct sctp_association *asoc);
756 int (*sctp_ss_get_value) (struct sctp_tcb *stcb, struct sctp_association *asoc,
757 struct sctp_stream_out *strq, uint16_t * value);
758 int (*sctp_ss_set_value) (struct sctp_tcb *stcb, struct sctp_association *asoc,
759 struct sctp_stream_out *strq, uint16_t value);
760 int (*sctp_ss_is_user_msgs_incomplete) (struct sctp_tcb *stcb, struct sctp_association *asoc);
761 };
762
763 /* used to save ASCONF chunks for retransmission */
764 TAILQ_HEAD(sctp_asconf_head, sctp_asconf);
765 struct sctp_asconf {
766 TAILQ_ENTRY(sctp_asconf) next;
767 uint32_t serial_number;
768 uint16_t snd_count;
769 struct mbuf *data;
770 uint16_t len;
771 };
772
773 /* used to save ASCONF-ACK chunks for retransmission */
774 TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack);
775 struct sctp_asconf_ack {
776 TAILQ_ENTRY(sctp_asconf_ack) next;
777 uint32_t serial_number;
778 struct sctp_nets *last_sent_to;
779 struct mbuf *data;
780 uint16_t len;
781 };
782
783 /*
784 * Here we have information about each individual association that we track.
785 * We probably in production would be more dynamic. But for ease of
786 * implementation we will have a fixed array that we hunt for in a linear
787 * fashion.
788 */
789 struct sctp_association {
790 /* association state */
791 int state;
792
793 /* queue of pending addrs to add/delete */
794 struct sctp_asconf_addrhead asconf_queue;
795
796 struct timeval time_entered; /* time we entered state */
797 struct timeval time_last_rcvd;
798 struct timeval time_last_sent;
799 struct timeval time_last_sat_advance;
800 struct sctp_nonpad_sndrcvinfo def_send;
801
802 /* timers and such */
803 struct sctp_timer dack_timer; /* Delayed ack timer */
804 struct sctp_timer asconf_timer; /* asconf */
805 struct sctp_timer strreset_timer; /* stream reset */
806 struct sctp_timer shut_guard_timer; /* shutdown guard */
807 struct sctp_timer autoclose_timer; /* automatic close timer */
808 struct sctp_timer delayed_event_timer; /* timer for delayed events */
809 struct sctp_timer delete_prim_timer; /* deleting primary dst */
810
811 /* list of restricted local addresses */
812 struct sctpladdr sctp_restricted_addrs;
813
814 /* last local address pending deletion (waiting for an address add) */
815 struct sctp_ifa *asconf_addr_del_pending;
816 /* Deleted primary destination (used to stop timer) */
817 struct sctp_nets *deleted_primary;
818
819 struct sctpnetlisthead nets; /* remote address list */
820
821 /* Free chunk list */
822 struct sctpchunk_listhead free_chunks;
823
824 /* Control chunk queue */
825 struct sctpchunk_listhead control_send_queue;
826
827 /* ASCONF chunk queue */
828 struct sctpchunk_listhead asconf_send_queue;
829
830 /*
831 * Once a TSN hits the wire it is moved to the sent_queue. We
832 * maintain two counts here (don't know if any but retran_cnt is
833 * needed). The idea is that the sent_queue_retran_cnt reflects how
834 * many chunks have been marked for retranmission by either T3-rxt
835 * or FR.
836 */
837 struct sctpchunk_listhead sent_queue;
838 struct sctpchunk_listhead send_queue;
839
840 /* Scheduling queues */
841 struct scheduling_data ss_data;
842
843 /* If an iterator is looking at me, this is it */
844 struct sctp_iterator *stcb_starting_point_for_iterator;
845
846 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */
847 struct sctp_asconf_ackhead asconf_ack_sent;
848
849 /*
850 * pointer to last stream reset queued to control queue by us with
851 * requests.
852 */
853 struct sctp_tmit_chunk *str_reset;
854 /*
855 * if Source Address Selection happening, this will rotate through
856 * the link list.
857 */
858 struct sctp_laddr *last_used_address;
859
860 /* stream arrays */
861 struct sctp_stream_in *strmin;
862 struct sctp_stream_out *strmout;
863 uint8_t *mapping_array;
864 /* primary destination to use */
865 struct sctp_nets *primary_destination;
866 struct sctp_nets *alternate; /* If primary is down or PF */
867 /* For CMT */
868 struct sctp_nets *last_net_cmt_send_started;
869 /* last place I got a data chunk from */
870 struct sctp_nets *last_data_chunk_from;
871 /* last place I got a control from */
872 struct sctp_nets *last_control_chunk_from;
873
874
875 /*
876 * wait to the point the cum-ack passes req->send_reset_at_tsn for
877 * any req on the list.
878 */
879 struct sctp_resethead resetHead;
880
881 /* queue of chunks waiting to be sent into the local stack */
882 struct sctp_readhead pending_reply_queue;
883
884 /* JRS - the congestion control functions are in this struct */
885 struct sctp_cc_functions cc_functions;
886 /*
887 * JRS - value to store the currently loaded congestion control
888 * module
889 */
890 uint32_t congestion_control_module;
891 /* RS - the stream scheduling functions are in this struct */
892 struct sctp_ss_functions ss_functions;
893 /* RS - value to store the currently loaded stream scheduling module */
894 uint32_t stream_scheduling_module;
895
896 uint32_t vrf_id;
897 uint32_t cookie_preserve_req;
898 /* ASCONF next seq I am sending out, inits at init-tsn */
899 uint32_t asconf_seq_out;
900 uint32_t asconf_seq_out_acked;
901 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */
902 uint32_t asconf_seq_in;
903
904 /* next seq I am sending in str reset messages */
905 uint32_t str_reset_seq_out;
906 /* next seq I am expecting in str reset messages */
907 uint32_t str_reset_seq_in;
908
909 /* various verification tag information */
910 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited
911 * by remote end, and I have unlocked this
912 * will be regenerated to a new random value. */
913 uint32_t peer_vtag; /* The peers last tag */
914
915 uint32_t my_vtag_nonce;
916 uint32_t peer_vtag_nonce;
917
918 uint32_t assoc_id;
919
920 /* This is the SCTP fragmentation threshold */
921 uint32_t smallest_mtu;
922
923 /*
924 * Special hook for Fast retransmit, allows us to track the highest
925 * TSN that is NEW in this SACK if gap ack blocks are present.
926 */
927 uint32_t this_sack_highest_gap;
928
929 /*
930 * The highest consecutive TSN that has been acked by peer on my
931 * sends
932 */
933 uint32_t last_acked_seq;
934
935 /* The next TSN that I will use in sending. */
936 uint32_t sending_seq;
937
938 /* Original seq number I used ??questionable to keep?? */
939 uint32_t init_seq_number;
940
941
942 /* The Advanced Peer Ack Point, as required by the PR-SCTP */
943 /* (A1 in Section 4.2) */
944 uint32_t advanced_peer_ack_point;
945
946 /*
947 * The highest consequetive TSN at the bottom of the mapping array
948 * (for his sends).
949 */
950 uint32_t cumulative_tsn;
951 /*
952 * Used to track the mapping array and its offset bits. This MAY be
953 * lower then cumulative_tsn.
954 */
955 uint32_t mapping_array_base_tsn;
956 /*
957 * used to track highest TSN we have received and is listed in the
958 * mapping array.
959 */
960 uint32_t highest_tsn_inside_map;
961
962 /* EY - new NR variables used for nr_sack based on mapping_array */
963 uint8_t *nr_mapping_array;
964 uint32_t highest_tsn_inside_nr_map;
965
966 uint32_t fast_recovery_tsn;
967 uint32_t sat_t3_recovery_tsn;
968 uint32_t tsn_last_delivered;
969 /*
970 * For the pd-api we should re-write this a bit more efficient. We
971 * could have multiple sctp_queued_to_read's that we are building at
972 * once. Now we only do this when we get ready to deliver to the
973 * socket buffer. Note that we depend on the fact that the struct is
974 * "stuck" on the read queue until we finish all the pd-api.
975 */
976 struct sctp_queued_to_read *control_pdapi;
977
978 uint32_t tsn_of_pdapi_last_delivered;
979 uint32_t pdapi_ppid;
980 uint32_t context;
981 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS];
982 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS];
983 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS];
984 #ifdef SCTP_ASOCLOG_OF_TSNS
985 /*
986 * special log - This adds considerable size to the asoc, but
987 * provides a log that you can use to detect problems via kgdb.
988 */
989 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE];
990 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE];
991 uint32_t cumack_log[SCTP_TSN_LOG_SIZE];
992 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE];
993 uint16_t tsn_in_at;
994 uint16_t tsn_out_at;
995 uint16_t tsn_in_wrapped;
996 uint16_t tsn_out_wrapped;
997 uint16_t cumack_log_at;
998 uint16_t cumack_log_atsnt;
999 #endif /* SCTP_ASOCLOG_OF_TSNS */
1000 #ifdef SCTP_FS_SPEC_LOG
1001 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE];
1002 uint16_t fs_index;
1003 #endif
1004
1005 /*
1006 * window state information and smallest MTU that I use to bound
1007 * segmentation
1008 */
1009 uint32_t peers_rwnd;
1010 uint32_t my_rwnd;
1011 uint32_t my_last_reported_rwnd;
1012 uint32_t sctp_frag_point;
1013
1014 uint32_t total_output_queue_size;
1015
1016 uint32_t sb_cc; /* shadow of sb_cc */
1017 uint32_t sb_send_resv; /* amount reserved on a send */
1018 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd
1019 * control */
1020 #ifdef INET6
1021 uint32_t default_flowlabel;
1022 #endif
1023 uint32_t pr_sctp_cnt;
1024 int ctrl_queue_cnt; /* could be removed REM - NO IT CAN'T!! RRS */
1025 /*
1026 * All outbound datagrams queue into this list from the individual
1027 * stream queue. Here they get assigned a TSN and then await
1028 * sending. The stream seq comes when it is first put in the
1029 * individual str queue
1030 */
1031 unsigned int stream_queue_cnt;
1032 unsigned int send_queue_cnt;
1033 unsigned int sent_queue_cnt;
1034 unsigned int sent_queue_cnt_removeable;
1035 /*
1036 * Number on sent queue that are marked for retran until this value
1037 * is 0 we only send one packet of retran'ed data.
1038 */
1039 unsigned int sent_queue_retran_cnt;
1040
1041 unsigned int size_on_reasm_queue;
1042 unsigned int cnt_on_reasm_queue;
1043 unsigned int fwd_tsn_cnt;
1044 /* amount of data (bytes) currently in flight (on all destinations) */
1045 unsigned int total_flight;
1046 /* Total book size in flight */
1047 unsigned int total_flight_count; /* count of chunks used with
1048 * book total */
1049 /* count of destinaton nets and list of destination nets */
1050 unsigned int numnets;
1051
1052 /* Total error count on this association */
1053 unsigned int overall_error_count;
1054
1055 unsigned int cnt_msg_on_sb;
1056
1057 /* All stream count of chunks for delivery */
1058 unsigned int size_on_all_streams;
1059 unsigned int cnt_on_all_streams;
1060
1061 /* Heart Beat delay in ms */
1062 uint32_t heart_beat_delay;
1063
1064 /* autoclose */
1065 unsigned int sctp_autoclose_ticks;
1066
1067 /* how many preopen streams we have */
1068 unsigned int pre_open_streams;
1069
1070 /* How many streams I support coming into me */
1071 unsigned int max_inbound_streams;
1072
1073 /* the cookie life I award for any cookie, in seconds */
1074 unsigned int cookie_life;
1075 /* time to delay acks for */
1076 unsigned int delayed_ack;
1077 unsigned int old_delayed_ack;
1078 unsigned int sack_freq;
1079 unsigned int data_pkts_seen;
1080
1081 unsigned int numduptsns;
1082 int dup_tsns[SCTP_MAX_DUP_TSNS];
1083 unsigned int initial_init_rto_max; /* initial RTO for INIT's */
1084 unsigned int initial_rto; /* initial send RTO */
1085 unsigned int minrto; /* per assoc RTO-MIN */
1086 unsigned int maxrto; /* per assoc RTO-MAX */
1087
1088 /* authentication fields */
1089 sctp_auth_chklist_t *local_auth_chunks;
1090 sctp_auth_chklist_t *peer_auth_chunks;
1091 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */
1092 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */
1093 struct sctp_keyhead shared_keys; /* assoc's shared keys */
1094 sctp_authinfo_t authinfo; /* randoms, cached keys */
1095 /*
1096 * refcnt to block freeing when a sender or receiver is off coping
1097 * user data in.
1098 */
1099 uint32_t refcnt;
1100 uint32_t chunks_on_out_queue; /* total chunks floating around,
1101 * locked by send socket buffer */
1102 uint32_t peers_adaptation;
1103 uint16_t peer_hmac_id; /* peer HMAC id to send */
1104
1105 /*
1106 * Being that we have no bag to collect stale cookies, and that we
1107 * really would not want to anyway.. we will count them in this
1108 * counter. We of course feed them to the pigeons right away (I have
1109 * always thought of pigeons as flying rats).
1110 */
1111 uint16_t stale_cookie_count;
1112
1113 /*
1114 * For the partial delivery API, if up, invoked this is what last
1115 * TSN I delivered
1116 */
1117 uint16_t str_of_pdapi;
1118 uint16_t ssn_of_pdapi;
1119
1120 /* counts of actual built streams. Allocation may be more however */
1121 /* could re-arrange to optimize space here. */
1122 uint16_t streamincnt;
1123 uint16_t streamoutcnt;
1124 uint16_t strm_realoutsize;
1125 uint16_t strm_pending_add_size;
1126 /* my maximum number of retrans of INIT and SEND */
1127 /* copied from SCTP but should be individually setable */
1128 uint16_t max_init_times;
1129 uint16_t max_send_times;
1130
1131 uint16_t def_net_failure;
1132
1133 uint16_t def_net_pf_threshold;
1134
1135 /*
1136 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is
1137 * awaiting ACK
1138 */
1139 uint16_t mapping_array_size;
1140
1141 uint16_t last_strm_seq_delivered;
1142 uint16_t last_strm_no_delivered;
1143
1144 uint16_t last_revoke_count;
1145 int16_t num_send_timers_up;
1146
1147 uint16_t stream_locked_on;
1148 uint16_t ecn_echo_cnt_onq;
1149
1150 uint16_t free_chunk_cnt;
1151 uint8_t stream_locked;
1152 uint8_t authenticated; /* packet authenticated ok */
1153 /*
1154 * This flag indicates that a SACK need to be sent. Initially this
1155 * is 1 to send the first sACK immediately.
1156 */
1157 uint8_t send_sack;
1158
1159 /* max burst of new packets into the network */
1160 uint32_t max_burst;
1161 /* max burst of fast retransmit packets */
1162 uint32_t fr_max_burst;
1163
1164 uint8_t sat_network; /* RTT is in range of sat net or greater */
1165 uint8_t sat_network_lockout; /* lockout code */
1166 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */
1167 /* flag goes on when we are doing a partial delivery api */
1168 uint8_t hb_random_values[4];
1169 uint8_t fragmented_delivery_inprogress;
1170 uint8_t fragment_flags;
1171 uint8_t last_flags_delivered;
1172 uint8_t hb_ect_randombit;
1173 uint8_t hb_random_idx;
1174 uint8_t default_dscp;
1175 uint8_t asconf_del_pending; /* asconf delete last addr pending */
1176 uint8_t trigger_reset;
1177 /*
1178 * This value, plus all other ack'd but above cum-ack is added
1179 * together to cross check against the bit that we have yet to
1180 * define (probably in the SACK). When the cum-ack is updated, this
1181 * sum is updated as well.
1182 */
1183
1184 /* Flags whether an extension is supported or not */
1185 uint8_t ecn_supported;
1186 uint8_t prsctp_supported;
1187 uint8_t auth_supported;
1188 uint8_t asconf_supported;
1189 uint8_t reconfig_supported;
1190 uint8_t nrsack_supported;
1191 uint8_t pktdrop_supported;
1192 uint8_t idata_supported;
1193
1194 /* Did the peer make the stream config (add out) request */
1195 uint8_t peer_req_out;
1196
1197 uint8_t local_strreset_support;
1198 uint8_t peer_supports_nat;
1199
1200 struct sctp_scoping scope;
1201 /* flags to handle send alternate net tracking */
1202 uint8_t used_alt_asconfack;
1203 uint8_t fast_retran_loss_recovery;
1204 uint8_t sat_t3_loss_recovery;
1205 uint8_t dropped_special_cnt;
1206 uint8_t seen_a_sack_this_pkt;
1207 uint8_t stream_reset_outstanding;
1208 uint8_t stream_reset_out_is_outstanding;
1209 uint8_t delayed_connection;
1210 uint8_t ifp_had_enobuf;
1211 uint8_t saw_sack_with_frags;
1212 uint8_t saw_sack_with_nr_frags;
1213 uint8_t in_asocid_hash;
1214 uint8_t assoc_up_sent;
1215 uint8_t adaptation_needed;
1216 uint8_t adaptation_sent;
1217 /* CMT variables */
1218 uint8_t cmt_dac_pkts_rcvd;
1219 uint8_t sctp_cmt_on_off;
1220 uint8_t iam_blocking;
1221 uint8_t cookie_how[8];
1222 /* JRS 5/21/07 - CMT PF variable */
1223 uint8_t sctp_cmt_pf;
1224 uint8_t use_precise_time;
1225 uint64_t sctp_features;
1226 uint32_t max_cwnd;
1227 uint16_t port; /* remote UDP encapsulation port */
1228 /*
1229 * The mapping array is used to track out of order sequences above
1230 * last_acked_seq. 0 indicates packet missing 1 indicates packet
1231 * rec'd. We slide it up every time we raise last_acked_seq and 0
1232 * trailing locactions out. If I get a TSN above the array
1233 * mappingArraySz, I discard the datagram and let retransmit happen.
1234 */
1235 uint32_t marked_retrans;
1236 uint32_t timoinit;
1237 uint32_t timodata;
1238 uint32_t timosack;
1239 uint32_t timoshutdown;
1240 uint32_t timoheartbeat;
1241 uint32_t timocookie;
1242 uint32_t timoshutdownack;
1243 struct timeval start_time;
1244 struct timeval discontinuity_time;
1245 uint64_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1];
1246 uint64_t abandoned_sent[SCTP_PR_SCTP_MAX + 1];
1247 };
1248
1249 #endif
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