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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 #ifdef __FreeBSD__
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD: head/sys/netinet/sctp_structs.h 255190 2013-09-03 19:31:59Z tuexen $");
36 #endif
37
38 #ifndef _NETINET_SCTP_STRUCTS_H_
39 #define _NETINET_SCTP_STRUCTS_H_
40
41 #include <netinet/sctp_os.h>
42 #include <netinet/sctp_header.h>
43 #include <netinet/sctp_auth.h>
44
45 struct sctp_timer {
46 sctp_os_timer_t timer;
47
48 int type;
49 /*
50 * Depending on the timer type these will be setup and cast with the
51 * appropriate entity.
52 */
53 void *ep;
54 void *tcb;
55 void *net;
56 #if defined(__FreeBSD__) && __FreeBSD_version >= 800000
57 void *vnet;
58 #endif
59
60 /* for sanity checking */
61 void *self;
62 uint32_t ticks;
63 uint32_t stopped_from;
64 };
65
66
67 struct sctp_foo_stuff {
68 struct sctp_inpcb *inp;
69 uint32_t lineno;
70 uint32_t ticks;
71 int updown;
72 };
73
74
75 /*
76 * This is the information we track on each interface that we know about from
77 * the distant end.
78 */
79 TAILQ_HEAD(sctpnetlisthead, sctp_nets);
80
81 struct sctp_stream_reset_list {
82 TAILQ_ENTRY(sctp_stream_reset_list) next_resp;
83 uint32_t tsn;
84 uint32_t number_entries;
85 uint16_t list_of_streams[];
86 };
87
88 TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list);
89
90 /*
91 * Users of the iterator need to malloc a iterator with a call to
92 * sctp_initiate_iterator(inp_func, assoc_func, inp_func, pcb_flags, pcb_features,
93 * asoc_state, void-ptr-arg, uint32-arg, end_func, inp);
94 *
95 * Use the following two defines if you don't care what pcb flags are on the EP
96 * and/or you don't care what state the association is in.
97 *
98 * Note that if you specify an INP as the last argument then ONLY each
99 * association of that single INP will be executed upon. Note that the pcb
100 * flags STILL apply so if the inp you specify has different pcb_flags then
101 * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to
102 * assure the inp you specify gets treated.
103 */
104 #define SCTP_PCB_ANY_FLAGS 0x00000000
105 #define SCTP_PCB_ANY_FEATURES 0x00000000
106 #define SCTP_ASOC_ANY_STATE 0x00000000
107
108 typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr,
109 uint32_t val);
110 typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val);
111 typedef void (*end_func) (void *ptr, uint32_t val);
112
113 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
114 /* whats on the mcore control struct */
115 struct sctp_mcore_queue {
116 TAILQ_ENTRY(sctp_mcore_queue) next;
117 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
118 struct vnet *vn;
119 #endif
120 struct mbuf *m;
121 int off;
122 int v6;
123 };
124
125 TAILQ_HEAD(sctp_mcore_qhead, sctp_mcore_queue);
126
127 struct sctp_mcore_ctrl {
128 SCTP_PROCESS_STRUCT thread_proc;
129 struct sctp_mcore_qhead que;
130 struct mtx core_mtx;
131 struct mtx que_mtx;
132 int running;
133 int cpuid;
134 };
135
136
137 #endif
138
139
140 struct sctp_iterator {
141 TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr;
142 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000
143 struct vnet *vn;
144 #endif
145 struct sctp_timer tmr;
146 struct sctp_inpcb *inp; /* current endpoint */
147 struct sctp_tcb *stcb; /* current* assoc */
148 struct sctp_inpcb *next_inp; /* special hook to skip to */
149 asoc_func function_assoc; /* per assoc function */
150 inp_func function_inp; /* per endpoint function */
151 inp_func function_inp_end; /* end INP function */
152 end_func function_atend; /* iterator completion function */
153 void *pointer; /* pointer for apply func to use */
154 uint32_t val; /* value for apply func to use */
155 uint32_t pcb_flags; /* endpoint flags being checked */
156 uint32_t pcb_features; /* endpoint features being checked */
157 uint32_t asoc_state; /* assoc state being checked */
158 uint32_t iterator_flags;
159 uint8_t no_chunk_output;
160 uint8_t done_current_ep;
161 };
162 /* iterator_flags values */
163 #define SCTP_ITERATOR_DO_ALL_INP 0x00000001
164 #define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002
165
166
167 TAILQ_HEAD(sctpiterators, sctp_iterator);
168
169 struct sctp_copy_all {
170 struct sctp_inpcb *inp; /* ep */
171 struct mbuf *m;
172 struct sctp_sndrcvinfo sndrcv;
173 int sndlen;
174 int cnt_sent;
175 int cnt_failed;
176 };
177
178 struct sctp_asconf_iterator {
179 struct sctpladdr list_of_work;
180 int cnt;
181 };
182
183 struct iterator_control {
184 #if defined(__FreeBSD__)
185 struct mtx ipi_iterator_wq_mtx;
186 struct mtx it_mtx;
187 #elif defined(__APPLE__)
188 lck_mtx_t *ipi_iterator_wq_mtx;
189 lck_mtx_t *it_mtx;
190 #elif defined(SCTP_PROCESS_LEVEL_LOCKS)
191 #if defined(__Userspace__)
192 userland_mutex_t ipi_iterator_wq_mtx;
193 userland_mutex_t it_mtx;
194 userland_cond_t iterator_wakeup;
195 #else
196 pthread_mutex_t ipi_iterator_wq_mtx;
197 pthread_mutex_t it_mtx;
198 pthread_cond_t iterator_wakeup;
199 #endif
200 #elif defined(__Windows__)
201 struct spinlock it_lock;
202 struct spinlock ipi_iterator_wq_lock;
203 KEVENT iterator_wakeup[2];
204 PFILE_OBJECT iterator_thread_obj;
205 #else
206 void *it_mtx;
207 #endif
208 #if !defined(__Windows__)
209 #if !defined(__Userspace__)
210 SCTP_PROCESS_STRUCT thread_proc;
211 #else
212 userland_thread_t thread_proc;
213 #endif
214 #endif
215 struct sctpiterators iteratorhead;
216 struct sctp_iterator *cur_it;
217 uint32_t iterator_running;
218 uint32_t iterator_flags;
219 };
220 #if !defined(__FreeBSD__)
221 #define SCTP_ITERATOR_MUST_EXIT 0x00000001
222 #define SCTP_ITERATOR_EXITED 0x00000002
223 #endif
224 #define SCTP_ITERATOR_STOP_CUR_IT 0x00000004
225 #define SCTP_ITERATOR_STOP_CUR_INP 0x00000008
226
227 struct sctp_net_route {
228 sctp_rtentry_t *ro_rt;
229 #if defined(__FreeBSD__)
230 #if __FreeBSD_version >= 800000
231 void *ro_lle;
232 #endif
233 #if __FreeBSD_version >= 900000
234 void *ro_ia;
235 int ro_flags;
236 #endif
237 #endif
238 #if defined(__APPLE__)
239 #if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION)
240 struct ifaddr *ro_srcia;
241 #endif
242 #if !defined(APPLE_LEOPARD)
243 uint32_t ro_flags;
244 #endif
245 #endif
246 union sctp_sockstore _l_addr; /* remote peer addr */
247 struct sctp_ifa *_s_addr; /* our selected src addr */
248 };
249
250 struct htcp {
251 uint16_t alpha; /* Fixed point arith, << 7 */
252 uint8_t beta; /* Fixed point arith, << 7 */
253 uint8_t modeswitch; /* Delay modeswitch until we had at least one congestion event */
254 uint32_t last_cong; /* Time since last congestion event end */
255 uint32_t undo_last_cong;
256 uint16_t bytes_acked;
257 uint32_t bytecount;
258 uint32_t minRTT;
259 uint32_t maxRTT;
260
261 uint32_t undo_maxRTT;
262 uint32_t undo_old_maxB;
263
264 /* Bandwidth estimation */
265 uint32_t minB;
266 uint32_t maxB;
267 uint32_t old_maxB;
268 uint32_t Bi;
269 uint32_t lasttime;
270 };
271
272 struct rtcc_cc {
273 struct timeval tls; /* The time we started the sending */
274 uint64_t lbw; /* Our last estimated bw */
275 uint64_t lbw_rtt; /* RTT at bw estimate */
276 uint64_t bw_bytes; /* The total bytes since this sending began */
277 uint64_t bw_tot_time; /* The total time since sending began */
278 uint64_t new_tot_time; /* temp holding the new value */
279 uint64_t bw_bytes_at_last_rttc; /* What bw_bytes was at last rtt calc */
280 uint32_t cwnd_at_bw_set; /* Cwnd at last bw saved - lbw */
281 uint32_t vol_reduce; /* cnt of voluntary reductions */
282 uint16_t steady_step; /* The number required to be in steady state*/
283 uint16_t step_cnt; /* The current number */
284 uint8_t ret_from_eq; /* When all things are equal what do I return 0/1 - 1 no cc advance */
285 uint8_t use_dccc_ecn; /* Flag to enable DCCC ECN */
286 uint8_t tls_needs_set; /* Flag to indicate we need to set tls 0 or 1 means set at send 2 not */
287 uint8_t last_step_state; /* Last state if steady state stepdown is on */
288 uint8_t rtt_set_this_sack; /* Flag saying this sack had RTT calc on it */
289 uint8_t last_inst_ind; /* Last saved inst indication */
290 };
291
292
293 struct sctp_nets {
294 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */
295
296 /*
297 * Things on the top half may be able to be split into a common
298 * structure shared by all.
299 */
300 struct sctp_timer pmtu_timer;
301 struct sctp_timer hb_timer;
302
303 /*
304 * The following two in combination equate to a route entry for v6
305 * or v4.
306 */
307 struct sctp_net_route ro;
308
309 /* mtu discovered so far */
310 uint32_t mtu;
311 uint32_t ssthresh; /* not sure about this one for split */
312 uint32_t last_cwr_tsn;
313 uint32_t cwr_window_tsn;
314 uint32_t ecn_ce_pkt_cnt;
315 uint32_t lost_cnt;
316 /* smoothed average things for RTT and RTO itself */
317 int lastsa;
318 int lastsv;
319 uint64_t rtt; /* last measured rtt value in us */
320 unsigned int RTO;
321
322 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */
323 struct sctp_timer rxt_timer;
324
325 /* last time in seconds I sent to it */
326 struct timeval last_sent_time;
327 union cc_control_data {
328 struct htcp htcp_ca; /* JRS - struct used in HTCP algorithm */
329 struct rtcc_cc rtcc; /* rtcc module cc stuff */
330 } cc_mod;
331 int ref_count;
332
333 /* Congestion stats per destination */
334 /*
335 * flight size variables and such, sorry Vern, I could not avoid
336 * this if I wanted performance :>
337 */
338 uint32_t flight_size;
339 uint32_t cwnd; /* actual cwnd */
340 uint32_t prev_cwnd; /* cwnd before any processing */
341 uint32_t ecn_prev_cwnd; /* ECN prev cwnd at first ecn_echo seen in new window */
342 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */
343 /* tracking variables to avoid the aloc/free in sack processing */
344 unsigned int net_ack;
345 unsigned int net_ack2;
346
347 /*
348 * JRS - 5/8/07 - Variable to track last time
349 * a destination was active for CMT PF
350 */
351 uint32_t last_active;
352
353 /*
354 * CMT variables (iyengar@cis.udel.edu)
355 */
356 uint32_t this_sack_highest_newack; /* tracks highest TSN newly
357 * acked for a given dest in
358 * the current SACK. Used in
359 * SFR and HTNA algos */
360 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected
361 * pseudo-cumack for this destination */
362 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next
363 * expected pseudo-cumack for this
364 * destination */
365
366 /* CMT fast recovery variables */
367 uint32_t fast_recovery_tsn;
368 uint32_t heartbeat_random1;
369 uint32_t heartbeat_random2;
370 #ifdef INET6
371 uint32_t flowlabel;
372 #endif
373 uint8_t dscp;
374
375 struct timeval start_time; /* time when this net was created */
376 uint32_t marked_retrans; /* number or DATA chunks marked for
377 timer based retransmissions */
378 uint32_t marked_fastretrans;
379 uint32_t heart_beat_delay; /* Heart Beat delay in ms */
380
381 /* if this guy is ok or not ... status */
382 uint16_t dest_state;
383 /* number of timeouts to consider the destination unreachable */
384 uint16_t failure_threshold;
385 /* number of timeouts to consider the destination potentially failed */
386 uint16_t pf_threshold;
387 /* error stats on the destination */
388 uint16_t error_count;
389 /* UDP port number in case of UDP tunneling */
390 uint16_t port;
391
392 uint8_t fast_retran_loss_recovery;
393 uint8_t will_exit_fast_recovery;
394 /* Flags that probably can be combined into dest_state */
395 uint8_t fast_retran_ip; /* fast retransmit in progress */
396 uint8_t hb_responded;
397 uint8_t saw_newack; /* CMT's SFR algorithm flag */
398 uint8_t src_addr_selected; /* if we split we move */
399 uint8_t indx_of_eligible_next_to_use;
400 uint8_t addr_is_local; /* its a local address (if known) could move
401 * in split */
402
403 /*
404 * CMT variables (iyengar@cis.udel.edu)
405 */
406 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to
407 * find a new pseudocumack. This flag
408 * is set after a new pseudo-cumack
409 * has been received and indicates
410 * that the sender should find the
411 * next pseudo-cumack expected for
412 * this destination */
413 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to
414 * find a new rtx-pseudocumack. This
415 * flag is set after a new
416 * rtx-pseudo-cumack has been received
417 * and indicates that the sender
418 * should find the next
419 * rtx-pseudo-cumack expected for this
420 * destination */
421 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to
422 * indicate if a new pseudo-cumack or
423 * rtx-pseudo-cumack has been received */
424 uint8_t window_probe; /* Doing a window probe? */
425 uint8_t RTO_measured; /* Have we done the first measure */
426 uint8_t last_hs_used; /* index into the last HS table entry we used */
427 uint8_t lan_type;
428 uint8_t rto_needed;
429 #if defined(__FreeBSD__)
430 uint32_t flowid;
431 #ifdef INVARIANTS
432 uint8_t flowidset;
433 #endif
434 #endif
435 };
436
437
438 struct sctp_data_chunkrec {
439 uint32_t TSN_seq; /* the TSN of this transmit */
440 uint16_t stream_seq; /* the stream sequence number of this transmit */
441 uint16_t stream_number; /* the stream number of this guy */
442 uint32_t payloadtype;
443 uint32_t context; /* from send */
444 uint32_t cwnd_at_send;
445 /*
446 * part of the Highest sacked algorithm to be able to stroke counts
447 * on ones that are FR'd.
448 */
449 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */
450 struct timeval timetodrop; /* time we drop it from queue */
451 uint8_t doing_fast_retransmit;
452 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for
453 * outbound holds sending flags for PR-SCTP.
454 */
455 uint8_t state_flags;
456 uint8_t chunk_was_revoked;
457 uint8_t fwd_tsn_cnt;
458 };
459
460 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk);
461
462 /* The lower byte is used to enumerate PR_SCTP policies */
463 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL
464 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF
465 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX
466
467 /* The upper byte is used as a bit mask */
468 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100
469
470 struct chk_id {
471 uint16_t id;
472 uint16_t can_take_data;
473 };
474
475
476 struct sctp_tmit_chunk {
477 union {
478 struct sctp_data_chunkrec data;
479 struct chk_id chunk_id;
480 } rec;
481 struct sctp_association *asoc; /* bp to asoc this belongs to */
482 struct timeval sent_rcv_time; /* filled in if RTT being calculated */
483 struct mbuf *data; /* pointer to mbuf chain of data */
484 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */
485 struct sctp_nets *whoTo;
486 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */
487 int32_t sent; /* the send status */
488 uint16_t snd_count; /* number of times I sent */
489 uint16_t flags; /* flags, such as FRAGMENT_OK */
490 uint16_t send_size;
491 uint16_t book_size;
492 uint16_t mbcnt;
493 uint16_t auth_keyid;
494 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */
495 uint8_t pad_inplace;
496 uint8_t do_rtt;
497 uint8_t book_size_scale;
498 uint8_t no_fr_allowed;
499 uint8_t copy_by_ref;
500 uint8_t window_probe;
501 };
502
503 /*
504 * The first part of this structure MUST be the entire sinfo structure. Maybe
505 * I should have made it a sub structure... we can circle back later and do
506 * that if we want.
507 */
508 struct sctp_queued_to_read { /* sinfo structure Pluse more */
509 uint16_t sinfo_stream; /* off the wire */
510 uint16_t sinfo_ssn; /* off the wire */
511 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for
512 * EOR */
513 uint32_t sinfo_ppid; /* off the wire */
514 uint32_t sinfo_context; /* pick this up from assoc def context? */
515 uint32_t sinfo_timetolive; /* not used by kernel */
516 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */
517 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */
518 sctp_assoc_t sinfo_assoc_id; /* our assoc id */
519 /* Non sinfo stuff */
520 uint32_t length; /* length of data */
521 uint32_t held_length; /* length held in sb */
522 struct sctp_nets *whoFrom; /* where it came from */
523 struct mbuf *data; /* front of the mbuf chain of data with
524 * PKT_HDR */
525 struct mbuf *tail_mbuf; /* used for multi-part data */
526 struct mbuf *aux_data; /* used to hold/cache control if o/s does not take it from us */
527 struct sctp_tcb *stcb; /* assoc, used for window update */
528 TAILQ_ENTRY(sctp_queued_to_read) next;
529 uint16_t port_from;
530 uint16_t spec_flags; /* Flags to hold the notification field */
531 uint8_t do_not_ref_stcb;
532 uint8_t end_added;
533 uint8_t pdapi_aborted;
534 uint8_t some_taken;
535 };
536
537 /* This data structure will be on the outbound
538 * stream queues. Data will be pulled off from
539 * the front of the mbuf data and chunk-ified
540 * by the output routines. We will custom
541 * fit every chunk we pull to the send/sent
542 * queue to make up the next full packet
543 * if we can. An entry cannot be removed
544 * from the stream_out queue until
545 * the msg_is_complete flag is set. This
546 * means at times data/tail_mbuf MIGHT
547 * be NULL.. If that occurs it happens
548 * for one of two reasons. Either the user
549 * is blocked on a send() call and has not
550 * awoken to copy more data down... OR
551 * the user is in the explict MSG_EOR mode
552 * and wrote some data, but has not completed
553 * sending.
554 */
555 struct sctp_stream_queue_pending {
556 struct mbuf *data;
557 struct mbuf *tail_mbuf;
558 struct timeval ts;
559 struct sctp_nets *net;
560 TAILQ_ENTRY (sctp_stream_queue_pending) next;
561 TAILQ_ENTRY (sctp_stream_queue_pending) ss_next;
562 uint32_t length;
563 uint32_t timetolive;
564 uint32_t ppid;
565 uint32_t context;
566 uint16_t sinfo_flags;
567 uint16_t stream;
568 uint16_t act_flags;
569 uint16_t auth_keyid;
570 uint8_t holds_key_ref;
571 uint8_t msg_is_complete;
572 uint8_t some_taken;
573 uint8_t sender_all_done;
574 uint8_t put_last_out;
575 uint8_t discard_rest;
576 };
577
578 /*
579 * this struct contains info that is used to track inbound stream data and
580 * help with ordering.
581 */
582 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in);
583 struct sctp_stream_in {
584 struct sctp_readhead inqueue;
585 uint16_t stream_no;
586 uint16_t last_sequence_delivered; /* used for re-order */
587 uint8_t delivery_started;
588 };
589
590 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out);
591 TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending);
592
593 /* Round-robin schedulers */
594 struct ss_rr {
595 /* next link in wheel */
596 TAILQ_ENTRY(sctp_stream_out) next_spoke;
597 };
598
599 /* Priority scheduler */
600 struct ss_prio {
601 /* next link in wheel */
602 TAILQ_ENTRY(sctp_stream_out) next_spoke;
603 /* priority id */
604 uint16_t priority;
605 };
606
607 /* Fair Bandwidth scheduler */
608 struct ss_fb {
609 /* next link in wheel */
610 TAILQ_ENTRY(sctp_stream_out) next_spoke;
611 /* stores message size */
612 int32_t rounds;
613 };
614
615 /*
616 * This union holds all data necessary for
617 * different stream schedulers.
618 */
619 union scheduling_data {
620 struct sctpwheel_listhead out_wheel;
621 struct sctplist_listhead out_list;
622 };
623
624 /*
625 * This union holds all parameters per stream
626 * necessary for different stream schedulers.
627 */
628 union scheduling_parameters {
629 struct ss_rr rr;
630 struct ss_prio prio;
631 struct ss_fb fb;
632 };
633
634 /* This struct is used to track the traffic on outbound streams */
635 struct sctp_stream_out {
636 struct sctp_streamhead outqueue;
637 union scheduling_parameters ss_params;
638 uint32_t chunks_on_queues;
639 uint16_t stream_no;
640 uint16_t next_sequence_send; /* next one I expect to send out */
641 uint8_t last_msg_incomplete;
642 };
643
644 /* used to keep track of the addresses yet to try to add/delete */
645 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr);
646 struct sctp_asconf_addr {
647 TAILQ_ENTRY(sctp_asconf_addr) next;
648 struct sctp_asconf_addr_param ap;
649 struct sctp_ifa *ifa; /* save the ifa for add/del ip */
650 uint8_t sent; /* has this been sent yet? */
651 uint8_t special_del; /* not to be used in lookup */
652 };
653
654 struct sctp_scoping {
655 uint8_t ipv4_addr_legal;
656 uint8_t ipv6_addr_legal;
657 #if defined(__Userspace__)
658 uint8_t conn_addr_legal;
659 #endif
660 uint8_t loopback_scope;
661 uint8_t ipv4_local_scope;
662 uint8_t local_scope;
663 uint8_t site_scope;
664 };
665
666 #define SCTP_TSN_LOG_SIZE 40
667
668 struct sctp_tsn_log {
669 void *stcb;
670 uint32_t tsn;
671 uint16_t strm;
672 uint16_t seq;
673 uint16_t sz;
674 uint16_t flgs;
675 uint16_t in_pos;
676 uint16_t in_out;
677 };
678
679 #define SCTP_FS_SPEC_LOG_SIZE 200
680 struct sctp_fs_spec_log {
681 uint32_t sent;
682 uint32_t total_flight;
683 uint32_t tsn;
684 uint16_t book;
685 uint8_t incr;
686 uint8_t decr;
687 };
688
689 /* This struct is here to cut out the compatiabilty
690 * pad that bulks up both the inp and stcb. The non
691 * pad portion MUST stay in complete sync with
692 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added
693 * this must be done here too.
694 */
695 struct sctp_nonpad_sndrcvinfo {
696 uint16_t sinfo_stream;
697 uint16_t sinfo_ssn;
698 uint16_t sinfo_flags;
699 uint32_t sinfo_ppid;
700 uint32_t sinfo_context;
701 uint32_t sinfo_timetolive;
702 uint32_t sinfo_tsn;
703 uint32_t sinfo_cumtsn;
704 sctp_assoc_t sinfo_assoc_id;
705 uint16_t sinfo_keynumber;
706 uint16_t sinfo_keynumber_valid;
707 };
708
709 /*
710 * JRS - Structure to hold function pointers to the functions responsible
711 * for congestion control.
712 */
713
714 struct sctp_cc_functions {
715 void (*sctp_set_initial_cc_param)(struct sctp_tcb *stcb, struct sctp_nets *net);
716 void (*sctp_cwnd_update_after_sack)(struct sctp_tcb *stcb,
717 struct sctp_association *asoc,
718 int accum_moved ,int reneged_all, int will_exit);
719 void (*sctp_cwnd_update_exit_pf)(struct sctp_tcb *stcb, struct sctp_nets *net);
720 void (*sctp_cwnd_update_after_fr)(struct sctp_tcb *stcb,
721 struct sctp_association *asoc);
722 void (*sctp_cwnd_update_after_timeout)(struct sctp_tcb *stcb,
723 struct sctp_nets *net);
724 void (*sctp_cwnd_update_after_ecn_echo)(struct sctp_tcb *stcb,
725 struct sctp_nets *net, int in_window, int num_pkt_lost);
726 void (*sctp_cwnd_update_after_packet_dropped)(struct sctp_tcb *stcb,
727 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp,
728 uint32_t *bottle_bw, uint32_t *on_queue);
729 void (*sctp_cwnd_update_after_output)(struct sctp_tcb *stcb,
730 struct sctp_nets *net, int burst_limit);
731 void (*sctp_cwnd_update_packet_transmitted)(struct sctp_tcb *stcb,
732 struct sctp_nets *net);
733 void (*sctp_cwnd_update_tsn_acknowledged)(struct sctp_nets *net,
734 struct sctp_tmit_chunk *);
735 void (*sctp_cwnd_new_transmission_begins)(struct sctp_tcb *stcb,
736 struct sctp_nets *net);
737 void (*sctp_cwnd_prepare_net_for_sack)(struct sctp_tcb *stcb,
738 struct sctp_nets *net);
739 int (*sctp_cwnd_socket_option)(struct sctp_tcb *stcb, int set, struct sctp_cc_option *);
740 void (*sctp_rtt_calculated)(struct sctp_tcb *, struct sctp_nets *, struct timeval *);
741 };
742
743 /*
744 * RS - Structure to hold function pointers to the functions responsible
745 * for stream scheduling.
746 */
747 struct sctp_ss_functions {
748 void (*sctp_ss_init)(struct sctp_tcb *stcb, struct sctp_association *asoc,
749 int holds_lock);
750 void (*sctp_ss_clear)(struct sctp_tcb *stcb, struct sctp_association *asoc,
751 int clear_values, int holds_lock);
752 void (*sctp_ss_init_stream)(struct sctp_stream_out *strq, struct sctp_stream_out *with_strq);
753 void (*sctp_ss_add_to_stream)(struct sctp_tcb *stcb, struct sctp_association *asoc,
754 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock);
755 int (*sctp_ss_is_empty)(struct sctp_tcb *stcb, struct sctp_association *asoc);
756 void (*sctp_ss_remove_from_stream)(struct sctp_tcb *stcb, struct sctp_association *asoc,
757 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock);
758 struct sctp_stream_out* (*sctp_ss_select_stream)(struct sctp_tcb *stcb,
759 struct sctp_nets *net, struct sctp_association *asoc);
760 void (*sctp_ss_scheduled)(struct sctp_tcb *stcb, struct sctp_nets *net,
761 struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much);
762 void (*sctp_ss_packet_done)(struct sctp_tcb *stcb, struct sctp_nets *net,
763 struct sctp_association *asoc);
764 int (*sctp_ss_get_value)(struct sctp_tcb *stcb, struct sctp_association *asoc,
765 struct sctp_stream_out *strq, uint16_t *value);
766 int (*sctp_ss_set_value)(struct sctp_tcb *stcb, struct sctp_association *asoc,
767 struct sctp_stream_out *strq, uint16_t value);
768 };
769
770 /* used to save ASCONF chunks for retransmission */
771 TAILQ_HEAD(sctp_asconf_head, sctp_asconf);
772 struct sctp_asconf {
773 TAILQ_ENTRY(sctp_asconf) next;
774 uint32_t serial_number;
775 uint16_t snd_count;
776 struct mbuf *data;
777 uint16_t len;
778 };
779
780 /* used to save ASCONF-ACK chunks for retransmission */
781 TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack);
782 struct sctp_asconf_ack {
783 TAILQ_ENTRY(sctp_asconf_ack) next;
784 uint32_t serial_number;
785 struct sctp_nets *last_sent_to;
786 struct mbuf *data;
787 uint16_t len;
788 };
789
790 /*
791 * Here we have information about each individual association that we track.
792 * We probably in production would be more dynamic. But for ease of
793 * implementation we will have a fixed array that we hunt for in a linear
794 * fashion.
795 */
796 struct sctp_association {
797 /* association state */
798 int state;
799
800 /* queue of pending addrs to add/delete */
801 struct sctp_asconf_addrhead asconf_queue;
802
803 struct timeval time_entered; /* time we entered state */
804 struct timeval time_last_rcvd;
805 struct timeval time_last_sent;
806 struct timeval time_last_sat_advance;
807 struct sctp_nonpad_sndrcvinfo def_send;
808
809 /* timers and such */
810 struct sctp_timer dack_timer; /* Delayed ack timer */
811 struct sctp_timer asconf_timer; /* asconf */
812 struct sctp_timer strreset_timer; /* stream reset */
813 struct sctp_timer shut_guard_timer; /* shutdown guard */
814 struct sctp_timer autoclose_timer; /* automatic close timer */
815 struct sctp_timer delayed_event_timer; /* timer for delayed events */
816 struct sctp_timer delete_prim_timer; /* deleting primary dst */
817
818 /* list of restricted local addresses */
819 struct sctpladdr sctp_restricted_addrs;
820
821 /* last local address pending deletion (waiting for an address add) */
822 struct sctp_ifa *asconf_addr_del_pending;
823 /* Deleted primary destination (used to stop timer) */
824 struct sctp_nets *deleted_primary;
825
826 struct sctpnetlisthead nets; /* remote address list */
827
828 /* Free chunk list */
829 struct sctpchunk_listhead free_chunks;
830
831 /* Control chunk queue */
832 struct sctpchunk_listhead control_send_queue;
833
834 /* ASCONF chunk queue */
835 struct sctpchunk_listhead asconf_send_queue;
836
837 /*
838 * Once a TSN hits the wire it is moved to the sent_queue. We
839 * maintain two counts here (don't know if any but retran_cnt is
840 * needed). The idea is that the sent_queue_retran_cnt reflects how
841 * many chunks have been marked for retranmission by either T3-rxt
842 * or FR.
843 */
844 struct sctpchunk_listhead sent_queue;
845 struct sctpchunk_listhead send_queue;
846
847 /* re-assembly queue for fragmented chunks on the inbound path */
848 struct sctpchunk_listhead reasmqueue;
849
850 /* Scheduling queues */
851 union scheduling_data ss_data;
852
853 /* This pointer will be set to NULL
854 * most of the time. But when we have
855 * a fragmented message, where we could
856 * not get out all of the message at
857 * the last send then this will point
858 * to the stream to go get data from.
859 */
860 struct sctp_stream_out *locked_on_sending;
861
862 /* If an iterator is looking at me, this is it */
863 struct sctp_iterator *stcb_starting_point_for_iterator;
864
865 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */
866 struct sctp_asconf_ackhead asconf_ack_sent;
867
868 /*
869 * pointer to last stream reset queued to control queue by us with
870 * requests.
871 */
872 struct sctp_tmit_chunk *str_reset;
873 /*
874 * if Source Address Selection happening, this will rotate through
875 * the link list.
876 */
877 struct sctp_laddr *last_used_address;
878
879 /* stream arrays */
880 struct sctp_stream_in *strmin;
881 struct sctp_stream_out *strmout;
882 uint8_t *mapping_array;
883 /* primary destination to use */
884 struct sctp_nets *primary_destination;
885 struct sctp_nets *alternate; /* If primary is down or PF */
886 /* For CMT */
887 struct sctp_nets *last_net_cmt_send_started;
888 /* last place I got a data chunk from */
889 struct sctp_nets *last_data_chunk_from;
890 /* last place I got a control from */
891 struct sctp_nets *last_control_chunk_from;
892
893 /* circular looking for output selection */
894 struct sctp_stream_out *last_out_stream;
895
896 /*
897 * wait to the point the cum-ack passes req->send_reset_at_tsn for
898 * any req on the list.
899 */
900 struct sctp_resethead resetHead;
901
902 /* queue of chunks waiting to be sent into the local stack */
903 struct sctp_readhead pending_reply_queue;
904
905 /* JRS - the congestion control functions are in this struct */
906 struct sctp_cc_functions cc_functions;
907 /* JRS - value to store the currently loaded congestion control module */
908 uint32_t congestion_control_module;
909 /* RS - the stream scheduling functions are in this struct */
910 struct sctp_ss_functions ss_functions;
911 /* RS - value to store the currently loaded stream scheduling module */
912 uint32_t stream_scheduling_module;
913
914 uint32_t vrf_id;
915
916 uint32_t cookie_preserve_req;
917 /* ASCONF next seq I am sending out, inits at init-tsn */
918 uint32_t asconf_seq_out;
919 uint32_t asconf_seq_out_acked;
920 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */
921 uint32_t asconf_seq_in;
922
923 /* next seq I am sending in str reset messages */
924 uint32_t str_reset_seq_out;
925 /* next seq I am expecting in str reset messages */
926 uint32_t str_reset_seq_in;
927
928 /* various verification tag information */
929 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited
930 * by remote end, and I have unlocked this
931 * will be regenerated to a new random value. */
932 uint32_t peer_vtag; /* The peers last tag */
933
934 uint32_t my_vtag_nonce;
935 uint32_t peer_vtag_nonce;
936
937 uint32_t assoc_id;
938
939 /* This is the SCTP fragmentation threshold */
940 uint32_t smallest_mtu;
941
942 /*
943 * Special hook for Fast retransmit, allows us to track the highest
944 * TSN that is NEW in this SACK if gap ack blocks are present.
945 */
946 uint32_t this_sack_highest_gap;
947
948 /*
949 * The highest consecutive TSN that has been acked by peer on my
950 * sends
951 */
952 uint32_t last_acked_seq;
953
954 /* The next TSN that I will use in sending. */
955 uint32_t sending_seq;
956
957 /* Original seq number I used ??questionable to keep?? */
958 uint32_t init_seq_number;
959
960
961 /* The Advanced Peer Ack Point, as required by the PR-SCTP */
962 /* (A1 in Section 4.2) */
963 uint32_t advanced_peer_ack_point;
964
965 /*
966 * The highest consequetive TSN at the bottom of the mapping array
967 * (for his sends).
968 */
969 uint32_t cumulative_tsn;
970 /*
971 * Used to track the mapping array and its offset bits. This MAY be
972 * lower then cumulative_tsn.
973 */
974 uint32_t mapping_array_base_tsn;
975 /*
976 * used to track highest TSN we have received and is listed in the
977 * mapping array.
978 */
979 uint32_t highest_tsn_inside_map;
980
981 /* EY - new NR variables used for nr_sack based on mapping_array*/
982 uint8_t *nr_mapping_array;
983 uint32_t highest_tsn_inside_nr_map;
984
985 uint32_t fast_recovery_tsn;
986 uint32_t sat_t3_recovery_tsn;
987 uint32_t tsn_last_delivered;
988 /*
989 * For the pd-api we should re-write this a bit more efficent. We
990 * could have multiple sctp_queued_to_read's that we are building at
991 * once. Now we only do this when we get ready to deliver to the
992 * socket buffer. Note that we depend on the fact that the struct is
993 * "stuck" on the read queue until we finish all the pd-api.
994 */
995 struct sctp_queued_to_read *control_pdapi;
996
997 uint32_t tsn_of_pdapi_last_delivered;
998 uint32_t pdapi_ppid;
999 uint32_t context;
1000 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS];
1001 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS];
1002 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS];
1003 #ifdef SCTP_ASOCLOG_OF_TSNS
1004 /*
1005 * special log - This adds considerable size
1006 * to the asoc, but provides a log that you
1007 * can use to detect problems via kgdb.
1008 */
1009 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE];
1010 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE];
1011 uint32_t cumack_log[SCTP_TSN_LOG_SIZE];
1012 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE];
1013 uint16_t tsn_in_at;
1014 uint16_t tsn_out_at;
1015 uint16_t tsn_in_wrapped;
1016 uint16_t tsn_out_wrapped;
1017 uint16_t cumack_log_at;
1018 uint16_t cumack_log_atsnt;
1019 #endif /* SCTP_ASOCLOG_OF_TSNS */
1020 #ifdef SCTP_FS_SPEC_LOG
1021 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE];
1022 uint16_t fs_index;
1023 #endif
1024
1025 /*
1026 * window state information and smallest MTU that I use to bound
1027 * segmentation
1028 */
1029 uint32_t peers_rwnd;
1030 uint32_t my_rwnd;
1031 uint32_t my_last_reported_rwnd;
1032 uint32_t sctp_frag_point;
1033
1034 uint32_t total_output_queue_size;
1035
1036 uint32_t sb_cc; /* shadow of sb_cc */
1037 uint32_t sb_send_resv; /* amount reserved on a send */
1038 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd control */
1039 #ifdef INET6
1040 uint32_t default_flowlabel;
1041 #endif
1042 uint32_t pr_sctp_cnt;
1043 int ctrl_queue_cnt; /* could be removed REM - NO IT CAN'T!! RRS */
1044 /*
1045 * All outbound datagrams queue into this list from the individual
1046 * stream queue. Here they get assigned a TSN and then await
1047 * sending. The stream seq comes when it is first put in the
1048 * individual str queue
1049 */
1050 unsigned int stream_queue_cnt;
1051 unsigned int send_queue_cnt;
1052 unsigned int sent_queue_cnt;
1053 unsigned int sent_queue_cnt_removeable;
1054 /*
1055 * Number on sent queue that are marked for retran until this value
1056 * is 0 we only send one packet of retran'ed data.
1057 */
1058 unsigned int sent_queue_retran_cnt;
1059
1060 unsigned int size_on_reasm_queue;
1061 unsigned int cnt_on_reasm_queue;
1062 unsigned int fwd_tsn_cnt;
1063 /* amount of data (bytes) currently in flight (on all destinations) */
1064 unsigned int total_flight;
1065 /* Total book size in flight */
1066 unsigned int total_flight_count; /* count of chunks used with
1067 * book total */
1068 /* count of destinaton nets and list of destination nets */
1069 unsigned int numnets;
1070
1071 /* Total error count on this association */
1072 unsigned int overall_error_count;
1073
1074 unsigned int cnt_msg_on_sb;
1075
1076 /* All stream count of chunks for delivery */
1077 unsigned int size_on_all_streams;
1078 unsigned int cnt_on_all_streams;
1079
1080 /* Heart Beat delay in ms */
1081 uint32_t heart_beat_delay;
1082
1083 /* autoclose */
1084 unsigned int sctp_autoclose_ticks;
1085
1086 /* how many preopen streams we have */
1087 unsigned int pre_open_streams;
1088
1089 /* How many streams I support coming into me */
1090 unsigned int max_inbound_streams;
1091
1092 /* the cookie life I award for any cookie, in seconds */
1093 unsigned int cookie_life;
1094 /* time to delay acks for */
1095 unsigned int delayed_ack;
1096 unsigned int old_delayed_ack;
1097 unsigned int sack_freq;
1098 unsigned int data_pkts_seen;
1099
1100 unsigned int numduptsns;
1101 int dup_tsns[SCTP_MAX_DUP_TSNS];
1102 unsigned int initial_init_rto_max; /* initial RTO for INIT's */
1103 unsigned int initial_rto; /* initial send RTO */
1104 unsigned int minrto; /* per assoc RTO-MIN */
1105 unsigned int maxrto; /* per assoc RTO-MAX */
1106
1107 /* authentication fields */
1108 sctp_auth_chklist_t *local_auth_chunks;
1109 sctp_auth_chklist_t *peer_auth_chunks;
1110 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */
1111 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */
1112 struct sctp_keyhead shared_keys; /* assoc's shared keys */
1113 sctp_authinfo_t authinfo; /* randoms, cached keys */
1114 /*
1115 * refcnt to block freeing when a sender or receiver is off coping
1116 * user data in.
1117 */
1118 uint32_t refcnt;
1119 uint32_t chunks_on_out_queue; /* total chunks floating around,
1120 * locked by send socket buffer */
1121 uint32_t peers_adaptation;
1122 uint16_t peer_hmac_id; /* peer HMAC id to send */
1123
1124 /*
1125 * Being that we have no bag to collect stale cookies, and that we
1126 * really would not want to anyway.. we will count them in this
1127 * counter. We of course feed them to the pigeons right away (I have
1128 * always thought of pigeons as flying rats).
1129 */
1130 uint16_t stale_cookie_count;
1131
1132 /*
1133 * For the partial delivery API, if up, invoked this is what last
1134 * TSN I delivered
1135 */
1136 uint16_t str_of_pdapi;
1137 uint16_t ssn_of_pdapi;
1138
1139 /* counts of actual built streams. Allocation may be more however */
1140 /* could re-arrange to optimize space here. */
1141 uint16_t streamincnt;
1142 uint16_t streamoutcnt;
1143 uint16_t strm_realoutsize;
1144 uint16_t strm_pending_add_size;
1145 /* my maximum number of retrans of INIT and SEND */
1146 /* copied from SCTP but should be individually setable */
1147 uint16_t max_init_times;
1148 uint16_t max_send_times;
1149
1150 uint16_t def_net_failure;
1151
1152 uint16_t def_net_pf_threshold;
1153
1154 /*
1155 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is
1156 * awaiting ACK
1157 */
1158 uint16_t mapping_array_size;
1159
1160 uint16_t last_strm_seq_delivered;
1161 uint16_t last_strm_no_delivered;
1162
1163 uint16_t last_revoke_count;
1164 int16_t num_send_timers_up;
1165
1166 uint16_t stream_locked_on;
1167 uint16_t ecn_echo_cnt_onq;
1168
1169 uint16_t free_chunk_cnt;
1170 uint8_t stream_locked;
1171 uint8_t authenticated; /* packet authenticated ok */
1172 /*
1173 * This flag indicates that a SACK need to be sent.
1174 * Initially this is 1 to send the first sACK immediately.
1175 */
1176 uint8_t send_sack;
1177
1178 /* max burst of new packets into the network */
1179 uint32_t max_burst;
1180 /* max burst of fast retransmit packets */
1181 uint32_t fr_max_burst;
1182
1183 uint8_t sat_network; /* RTT is in range of sat net or greater */
1184 uint8_t sat_network_lockout; /* lockout code */
1185 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */
1186 /* flag goes on when we are doing a partial delivery api */
1187 uint8_t hb_random_values[4];
1188 uint8_t fragmented_delivery_inprogress;
1189 uint8_t fragment_flags;
1190 uint8_t last_flags_delivered;
1191 uint8_t hb_ect_randombit;
1192 uint8_t hb_random_idx;
1193 uint8_t default_dscp;
1194 uint8_t asconf_del_pending; /* asconf delete last addr pending */
1195
1196 /*
1197 * This value, plus all other ack'd but above cum-ack is added
1198 * together to cross check against the bit that we have yet to
1199 * define (probably in the SACK). When the cum-ack is updated, this
1200 * sum is updated as well.
1201 */
1202
1203 /* Flag to tell if ECN is allowed */
1204 uint8_t ecn_allowed;
1205
1206 /* Did the peer make the stream config (add out) request */
1207 uint8_t peer_req_out;
1208
1209 /* flag to indicate if peer can do asconf */
1210 uint8_t peer_supports_asconf;
1211 /* EY - flag to indicate if peer can do nr_sack*/
1212 uint8_t peer_supports_nr_sack;
1213 /* pr-sctp support flag */
1214 uint8_t peer_supports_prsctp;
1215 /* peer authentication support flag */
1216 uint8_t peer_supports_auth;
1217 /* stream resets are supported by the peer */
1218 uint8_t peer_supports_strreset;
1219 uint8_t local_strreset_support;
1220
1221 uint8_t peer_supports_nat;
1222 /*
1223 * packet drop's are supported by the peer, we don't really care
1224 * about this but we bookkeep it anyway.
1225 */
1226 uint8_t peer_supports_pktdrop;
1227
1228 struct sctp_scoping scope;
1229 /* flags to handle send alternate net tracking */
1230 uint8_t used_alt_onsack;
1231 uint8_t used_alt_asconfack;
1232 uint8_t fast_retran_loss_recovery;
1233 uint8_t sat_t3_loss_recovery;
1234 uint8_t dropped_special_cnt;
1235 uint8_t seen_a_sack_this_pkt;
1236 uint8_t stream_reset_outstanding;
1237 uint8_t stream_reset_out_is_outstanding;
1238 uint8_t delayed_connection;
1239 uint8_t ifp_had_enobuf;
1240 uint8_t saw_sack_with_frags;
1241 uint8_t saw_sack_with_nr_frags;
1242 uint8_t in_asocid_hash;
1243 uint8_t assoc_up_sent;
1244 uint8_t adaptation_needed;
1245 uint8_t adaptation_sent;
1246 /* CMT variables */
1247 uint8_t cmt_dac_pkts_rcvd;
1248 uint8_t sctp_cmt_on_off;
1249 uint8_t iam_blocking;
1250 uint8_t cookie_how[8];
1251 /* EY 05/05/08 - NR_SACK variable*/
1252 uint8_t sctp_nr_sack_on_off;
1253 /* JRS 5/21/07 - CMT PF variable */
1254 uint8_t sctp_cmt_pf;
1255 uint8_t use_precise_time;
1256 uint64_t sctp_features;
1257 uint16_t port; /* remote UDP encapsulation port */
1258 /*
1259 * The mapping array is used to track out of order sequences above
1260 * last_acked_seq. 0 indicates packet missing 1 indicates packet
1261 * rec'd. We slide it up every time we raise last_acked_seq and 0
1262 * trailing locactions out. If I get a TSN above the array
1263 * mappingArraySz, I discard the datagram and let retransmit happen.
1264 */
1265 uint32_t marked_retrans;
1266 uint32_t timoinit;
1267 uint32_t timodata;
1268 uint32_t timosack;
1269 uint32_t timoshutdown;
1270 uint32_t timoheartbeat;
1271 uint32_t timocookie;
1272 uint32_t timoshutdownack;
1273 struct timeval start_time;
1274 struct timeval discontinuity_time;
1275 };
1276
1277 #endif

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