2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
7 * a) Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
10 * b) Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the distribution.
14 * c) Neither the name of Cisco Systems, Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28 * THE POSSIBILITY OF SUCH DAMAGE.
31 /* $KAME: sctp_structs.h,v 1.13 2005/03/06 16:04:18 itojun Exp $ */
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #ifndef __sctp_structs_h__
37 #define __sctp_structs_h__
39 #include <netinet/sctp_os.h>
40 #include <netinet/sctp_header.h>
41 #include <netinet/sctp_auth.h>
44 sctp_os_timer_t timer;
48 * Depending on the timer type these will be setup and cast with the
55 /* for sanity checking */
58 uint32_t stopped_from;
62 struct sctp_foo_stuff {
63 struct sctp_inpcb *inp;
71 * This is the information we track on each interface that we know about from
74 TAILQ_HEAD(sctpnetlisthead, sctp_nets);
76 struct sctp_stream_reset_list {
77 TAILQ_ENTRY(sctp_stream_reset_list) next_resp;
80 struct sctp_stream_reset_out_request req;
83 TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list);
86 * Users of the iterator need to malloc a iterator with a call to
87 * sctp_initiate_iterator(inp_func, assoc_func, inp_func, pcb_flags, pcb_features,
88 * asoc_state, void-ptr-arg, uint32-arg, end_func, inp);
90 * Use the following two defines if you don't care what pcb flags are on the EP
91 * and/or you don't care what state the association is in.
93 * Note that if you specify an INP as the last argument then ONLY each
94 * association of that single INP will be executed upon. Note that the pcb
95 * flags STILL apply so if the inp you specify has different pcb_flags then
96 * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to
97 * assure the inp you specify gets treated.
99 #define SCTP_PCB_ANY_FLAGS 0x00000000
100 #define SCTP_PCB_ANY_FEATURES 0x00000000
101 #define SCTP_ASOC_ANY_STATE 0x00000000
103 typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr,
105 typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val);
106 typedef void (*end_func) (void *ptr, uint32_t val);
108 struct sctp_iterator {
109 TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr;
110 struct sctp_timer tmr;
111 struct sctp_inpcb *inp; /* current endpoint */
112 struct sctp_tcb *stcb; /* current* assoc */
113 asoc_func function_assoc; /* per assoc function */
114 inp_func function_inp; /* per endpoint function */
115 inp_func function_inp_end; /* end INP function */
116 end_func function_atend;/* iterator completion function */
117 void *pointer; /* pointer for apply func to use */
118 uint32_t val; /* value for apply func to use */
119 uint32_t pcb_flags; /* endpoint flags being checked */
120 uint32_t pcb_features; /* endpoint features being checked */
121 uint32_t asoc_state; /* assoc state being checked */
122 uint32_t iterator_flags;
123 uint8_t no_chunk_output;
124 uint8_t done_current_ep;
127 /* iterator_flags values */
128 #define SCTP_ITERATOR_DO_ALL_INP 0x00000001
129 #define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002
131 TAILQ_HEAD(sctpiterators, sctp_iterator);
133 struct sctp_copy_all {
134 struct sctp_inpcb *inp; /* ep */
136 struct sctp_sndrcvinfo sndrcv;
142 struct sctp_asconf_iterator {
143 struct sctpladdr list_of_work;
148 struct sctp_net_route {
149 sctp_rtentry_t *ro_rt;
150 union sctp_sockstore _l_addr; /* remote peer addr */
151 struct sctp_ifa *_s_addr; /* our selected src addr */
155 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */
158 * Things on the top half may be able to be split into a common
159 * structure shared by all.
161 struct sctp_timer pmtu_timer;
164 * The following two in combination equate to a route entry for v6
167 struct sctp_net_route ro;
169 /* mtu discovered so far */
171 uint32_t ssthresh; /* not sure about this one for split */
173 /* smoothed average things for RTT and RTO itself */
178 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */
179 struct sctp_timer rxt_timer;
180 struct sctp_timer fr_timer; /* for early fr */
182 /* last time in seconds I sent to it */
183 struct timeval last_sent_time;
186 /* Congestion stats per destination */
188 * flight size variables and such, sorry Vern, I could not avoid
189 * this if I wanted performance :>
191 uint32_t flight_size;
192 uint32_t cwnd; /* actual cwnd */
193 uint32_t prev_cwnd; /* cwnd before any processing */
194 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */
196 /* tracking variables to avoid the aloc/free in sack processing */
197 unsigned int net_ack;
198 unsigned int net_ack2;
201 * CMT variables (iyengar@cis.udel.edu)
203 uint32_t this_sack_highest_newack; /* tracks highest TSN newly
204 * acked for a given dest in
205 * the current SACK. Used in
206 * SFR and HTNA algos */
207 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected
208 * pseudo-cumack for this destination */
209 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next
210 * expected pseudo-cumack for this
213 /* CMT fast recovery variables */
214 uint32_t fast_recovery_tsn;
215 uint32_t heartbeat_random1;
216 uint32_t heartbeat_random2;
217 uint32_t tos_flowlabel;
219 struct timeval start_time; /* time when this net was created */
221 uint32_t marked_retrans;/* number or DATA chunks marked for timer
222 * based retransmissions */
223 uint32_t marked_fastretrans;
225 /* if this guy is ok or not ... status */
227 /* number of transmit failures to down this guy */
228 uint16_t failure_threshold;
229 /* error stats on destination */
230 uint16_t error_count;
232 uint8_t fast_retran_loss_recovery;
233 uint8_t will_exit_fast_recovery;
234 /* Flags that probably can be combined into dest_state */
235 uint8_t fast_retran_ip; /* fast retransmit in progress */
236 uint8_t hb_responded;
237 uint8_t saw_newack; /* CMT's SFR algorithm flag */
238 uint8_t src_addr_selected; /* if we split we move */
239 uint8_t indx_of_eligible_next_to_use;
240 uint8_t addr_is_local; /* its a local address (if known) could move
244 * CMT variables (iyengar@cis.udel.edu)
246 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to
247 * find a new pseudocumack. This flag
248 * is set after a new pseudo-cumack
249 * has been received and indicates
250 * that the sender should find the
251 * next pseudo-cumack expected for
252 * this destination */
253 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to
254 * find a new rtx-pseudocumack. This
255 * flag is set after a new
256 * rtx-pseudo-cumack has been received
257 * and indicates that the sender
258 * should find the next
259 * rtx-pseudo-cumack expected for this
261 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to
262 * indicate if a new pseudo-cumack or
263 * rtx-pseudo-cumack has been received */
264 uint8_t window_probe; /* Doing a window probe? */
265 uint8_t RTO_measured; /* Have we done the first measure */
266 #ifdef SCTP_HIGH_SPEED
267 uint8_t last_hs_used; /* index into the last HS table entry we used */
272 struct sctp_data_chunkrec {
273 uint32_t TSN_seq; /* the TSN of this transmit */
274 uint16_t stream_seq; /* the stream sequence number of this transmit */
275 uint16_t stream_number; /* the stream number of this guy */
276 uint32_t payloadtype;
277 uint32_t context; /* from send */
279 /* ECN Nonce: Nonce Value for this chunk */
283 * part of the Highest sacked algorithm to be able to stroke counts
284 * on ones that are FR'd.
286 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */
287 struct timeval timetodrop; /* time we drop it from queue */
288 uint8_t doing_fast_retransmit;
289 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for
290 * outbound holds sending flags for PR-SCTP. */
292 uint8_t chunk_was_revoked;
295 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk);
297 /* The lower byte is used to enumerate PR_SCTP policies */
298 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL
299 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF
300 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX
302 /* The upper byte is used a a bit mask */
303 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100
307 uint16_t can_take_data;
311 struct sctp_tmit_chunk {
313 struct sctp_data_chunkrec data;
314 struct chk_id chunk_id;
316 struct sctp_association *asoc; /* bp to asoc this belongs to */
317 struct timeval sent_rcv_time; /* filled in if RTT being calculated */
318 struct mbuf *data; /* pointer to mbuf chain of data */
319 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */
320 struct sctp_nets *whoTo;
321 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */
322 int32_t sent; /* the send status */
323 uint16_t snd_count; /* number of times I sent */
324 uint16_t flags; /* flags, such as FRAGMENT_OK */
330 uint8_t book_size_scale;
331 uint8_t addr_over; /* flag which is set if the dest address for
332 * this chunk is overridden by user. Used for
333 * CMT (iyengar@cis.udel.edu, 2005/06/21) */
334 uint8_t no_fr_allowed;
337 uint8_t window_probe;
341 * The first part of this structure MUST be the entire sinfo structure. Maybe
342 * I should have made it a sub structure... we can circle back later and do
345 struct sctp_queued_to_read { /* sinfo structure Pluse more */
346 uint16_t sinfo_stream; /* off the wire */
347 uint16_t sinfo_ssn; /* off the wire */
348 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for
350 uint32_t sinfo_ppid; /* off the wire */
351 uint32_t sinfo_context; /* pick this up from assoc def context? */
352 uint32_t sinfo_timetolive; /* not used by kernel */
353 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */
354 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */
355 sctp_assoc_t sinfo_assoc_id; /* our assoc id */
356 /* Non sinfo stuff */
357 uint32_t length; /* length of data */
358 uint32_t held_length; /* length held in sb */
359 struct sctp_nets *whoFrom; /* where it came from */
360 struct mbuf *data; /* front of the mbuf chain of data with
362 struct mbuf *tail_mbuf; /* used for multi-part data */
363 struct mbuf *aux_data; /* used to hold/cache control if o/s does not
365 struct sctp_tcb *stcb; /* assoc, used for window update */
366 TAILQ_ENTRY(sctp_queued_to_read) next;
368 uint16_t spec_flags; /* Flags to hold the notification field */
369 uint8_t do_not_ref_stcb;
371 uint8_t pdapi_aborted;
375 /* This data structure will be on the outbound
376 * stream queues. Data will be pulled off from
377 * the front of the mbuf data and chunk-ified
378 * by the output routines. We will custom
379 * fit every chunk we pull to the send/sent
380 * queue to make up the next full packet
381 * if we can. An entry cannot be removed
382 * from the stream_out queue until
383 * the msg_is_complete flag is set. This
384 * means at times data/tail_mbuf MIGHT
385 * be NULL.. If that occurs it happens
386 * for one of two reasons. Either the user
387 * is blocked on a send() call and has not
388 * awoken to copy more data down... OR
389 * the user is in the explict MSG_EOR mode
390 * and wrote some data, but has not completed
393 struct sctp_stream_queue_pending {
395 struct mbuf *tail_mbuf;
397 struct sctp_nets *net;
398 TAILQ_ENTRY(sctp_stream_queue_pending) next;
403 uint16_t sinfo_flags;
407 uint8_t msg_is_complete;
411 uint8_t sender_all_done;
412 uint8_t put_last_out;
416 * this struct contains info that is used to track inbound stream data and
417 * help with ordering.
419 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in);
420 struct sctp_stream_in {
421 struct sctp_readhead inqueue;
423 uint16_t last_sequence_delivered; /* used for re-order */
424 uint8_t delivery_started;
427 /* This struct is used to track the traffic on outbound streams */
428 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out);
429 struct sctp_stream_out {
430 struct sctp_streamhead outqueue;
431 TAILQ_ENTRY(sctp_stream_out) next_spoke; /* next link in wheel */
433 uint16_t next_sequence_sent; /* next one I expect to send out */
434 uint8_t last_msg_incomplete;
437 /* used to keep track of the addresses yet to try to add/delete */
438 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr);
439 struct sctp_asconf_addr {
440 TAILQ_ENTRY(sctp_asconf_addr) next;
441 struct sctp_asconf_addr_param ap;
442 struct sctp_ifa *ifa; /* save the ifa for add/del ip */
443 uint8_t sent; /* has this been sent yet? */
446 struct sctp_scoping {
447 uint8_t ipv4_addr_legal;
448 uint8_t ipv6_addr_legal;
449 uint8_t loopback_scope;
450 uint8_t ipv4_local_scope;
455 #define SCTP_TSN_LOG_SIZE 40
457 struct sctp_tsn_log {
467 /* This struct is here to cut out the compatiabilty
468 * pad that bulks up both the inp and stcb. The non
469 * pad portion MUST stay in complete sync with
470 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added
471 * this must be done here too.
473 struct sctp_nonpad_sndrcvinfo {
474 uint16_t sinfo_stream;
476 uint16_t sinfo_flags;
478 uint32_t sinfo_context;
479 uint32_t sinfo_timetolive;
481 uint32_t sinfo_cumtsn;
482 sctp_assoc_t sinfo_assoc_id;
486 * Here we have information about each individual association that we track.
487 * We probably in production would be more dynamic. But for ease of
488 * implementation we will have a fixed array that we hunt for in a linear
491 struct sctp_association {
492 /* association state */
494 /* queue of pending addrs to add/delete */
495 struct sctp_asconf_addrhead asconf_queue;
496 struct timeval time_entered; /* time we entered state */
497 struct timeval time_last_rcvd;
498 struct timeval time_last_sent;
499 struct timeval time_last_sat_advance;
500 struct sctp_nonpad_sndrcvinfo def_send;
502 /* timers and such */
503 struct sctp_timer hb_timer; /* hb timer */
504 struct sctp_timer dack_timer; /* Delayed ack timer */
505 struct sctp_timer asconf_timer; /* Asconf */
506 struct sctp_timer strreset_timer; /* stream reset */
507 struct sctp_timer shut_guard_timer; /* guard */
508 struct sctp_timer autoclose_timer; /* automatic close timer */
509 struct sctp_timer delayed_event_timer; /* timer for delayed events */
511 /* list of local addresses when add/del in progress */
512 struct sctpladdr sctp_restricted_addrs;
514 struct sctpnetlisthead nets;
516 /* Free chunk list */
517 struct sctpchunk_listhead free_chunks;
520 /* Control chunk queue */
521 struct sctpchunk_listhead control_send_queue;
524 * Once a TSN hits the wire it is moved to the sent_queue. We
525 * maintain two counts here (don't know if any but retran_cnt is
526 * needed). The idea is that the sent_queue_retran_cnt reflects how
527 * many chunks have been marked for retranmission by either T3-rxt
530 struct sctpchunk_listhead sent_queue;
531 struct sctpchunk_listhead send_queue;
534 /* re-assembly queue for fragmented chunks on the inbound path */
535 struct sctpchunk_listhead reasmqueue;
538 * this queue is used when we reach a condition that we can NOT put
539 * data into the socket buffer. We track the size of this queue and
540 * set our rwnd to the space in the socket minus also the
541 * size_on_delivery_queue.
543 struct sctpwheel_listhead out_wheel;
546 * This pointer will be set to NULL most of the time. But when we
547 * have a fragmented message, where we could not get out all of the
548 * message at the last send then this will point to the stream to go
551 struct sctp_stream_out *locked_on_sending;
553 /* If an iterator is looking at me, this is it */
554 struct sctp_iterator *stcb_starting_point_for_iterator;
556 /* ASCONF destination address last sent to */
557 /* struct sctp_nets *asconf_last_sent_to;*/
558 /* Peter, greppign for the above shows only on strange set
559 * I don't think we need it so I have commented it out.
562 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */
563 struct mbuf *last_asconf_ack_sent;
566 * pointer to last stream reset queued to control queue by us with
569 struct sctp_tmit_chunk *str_reset;
571 * if Source Address Selection happening, this will rotate through
574 struct sctp_laddr *last_used_address;
577 struct sctp_stream_in *strmin;
578 struct sctp_stream_out *strmout;
579 uint8_t *mapping_array;
580 /* primary destination to use */
581 struct sctp_nets *primary_destination;
583 struct sctp_nets *last_net_data_came_from;
584 /* last place I got a data chunk from */
585 struct sctp_nets *last_data_chunk_from;
586 /* last place I got a control from */
587 struct sctp_nets *last_control_chunk_from;
589 /* circular looking for output selection */
590 struct sctp_stream_out *last_out_stream;
593 * wait to the point the cum-ack passes req->send_reset_at_tsn for
594 * any req on the list.
596 struct sctp_resethead resetHead;
598 /* queue of chunks waiting to be sent into the local stack */
599 struct sctp_readhead pending_reply_queue;
603 uint32_t cookie_preserve_req;
604 /* ASCONF next seq I am sending out, inits at init-tsn */
605 uint32_t asconf_seq_out;
606 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */
607 uint32_t asconf_seq_in;
609 /* next seq I am sending in str reset messages */
610 uint32_t str_reset_seq_out;
611 /* next seq I am expecting in str reset messages */
612 uint32_t str_reset_seq_in;
614 /* various verification tag information */
615 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited
616 * by remote end, and I have unlocked this
617 * will be regenerated to a new random value. */
618 uint32_t peer_vtag; /* The peers last tag */
620 uint32_t my_vtag_nonce;
621 uint32_t peer_vtag_nonce;
625 /* This is the SCTP fragmentation threshold */
626 uint32_t smallest_mtu;
629 * Special hook for Fast retransmit, allows us to track the highest
630 * TSN that is NEW in this SACK if gap ack blocks are present.
632 uint32_t this_sack_highest_gap;
635 * The highest consecutive TSN that has been acked by peer on my
638 uint32_t last_acked_seq;
640 /* The next TSN that I will use in sending. */
641 uint32_t sending_seq;
643 /* Original seq number I used ??questionable to keep?? */
644 uint32_t init_seq_number;
647 /* The Advanced Peer Ack Point, as required by the PR-SCTP */
648 /* (A1 in Section 4.2) */
649 uint32_t advanced_peer_ack_point;
652 * The highest consequetive TSN at the bottom of the mapping array
655 uint32_t cumulative_tsn;
657 * Used to track the mapping array and its offset bits. This MAY be
658 * lower then cumulative_tsn.
660 uint32_t mapping_array_base_tsn;
662 * used to track highest TSN we have received and is listed in the
665 uint32_t highest_tsn_inside_map;
667 uint32_t last_echo_tsn;
668 uint32_t last_cwr_tsn;
669 uint32_t fast_recovery_tsn;
670 uint32_t sat_t3_recovery_tsn;
671 uint32_t tsn_last_delivered;
673 * For the pd-api we should re-write this a bit more efficent. We
674 * could have multiple sctp_queued_to_read's that we are building at
675 * once. Now we only do this when we get ready to deliver to the
676 * socket buffer. Note that we depend on the fact that the struct is
677 * "stuck" on the read queue until we finish all the pd-api.
679 struct sctp_queued_to_read *control_pdapi;
681 uint32_t tsn_of_pdapi_last_delivered;
684 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS];
685 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS];
686 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS];
687 #ifdef SCTP_ASOCLOG_OF_TSNS
689 * special log - This adds considerable size to the asoc, but
690 * provides a log that you can use to detect problems via kgdb.
692 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE];
693 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE];
696 uint16_t tsn_in_wrapped;
697 uint16_t tsn_out_wrapped;
698 #endif /* SCTP_ASOCLOG_OF_TSNS */
700 * window state information and smallest MTU that I use to bound
705 uint32_t my_last_reported_rwnd;
706 uint32_t my_rwnd_control_len;
707 uint32_t sctp_frag_point;
709 uint32_t total_output_queue_size;
711 uint32_t sb_cc; /* shadow of sb_cc in one-2-one */
712 uint32_t sb_mbcnt; /* shadow of sb_mbcnt in one-2-one */
713 /* 32 bit nonce stuff */
714 uint32_t nonce_resync_tsn;
715 uint32_t nonce_wait_tsn;
716 uint32_t default_flowlabel;
717 uint32_t pr_sctp_cnt;
718 int ctrl_queue_cnt; /* could be removed REM */
720 * All outbound datagrams queue into this list from the individual
721 * stream queue. Here they get assigned a TSN and then await
722 * sending. The stream seq comes when it is first put in the
723 * individual str queue
725 unsigned int stream_queue_cnt;
726 unsigned int send_queue_cnt;
727 unsigned int sent_queue_cnt;
728 unsigned int sent_queue_cnt_removeable;
730 * Number on sent queue that are marked for retran until this value
731 * is 0 we only send one packet of retran'ed data.
733 unsigned int sent_queue_retran_cnt;
735 unsigned int size_on_reasm_queue;
736 unsigned int cnt_on_reasm_queue;
737 /* amount of data (bytes) currently in flight (on all destinations) */
738 unsigned int total_flight;
739 /* Total book size in flight */
740 unsigned int total_flight_count; /* count of chunks used with
742 /* count of destinaton nets and list of destination nets */
743 unsigned int numnets;
745 /* Total error count on this association */
746 unsigned int overall_error_count;
748 unsigned int cnt_msg_on_sb;
750 /* All stream count of chunks for delivery */
751 unsigned int size_on_all_streams;
752 unsigned int cnt_on_all_streams;
754 /* Heart Beat delay in ticks */
755 unsigned int heart_beat_delay;
758 unsigned int sctp_autoclose_ticks;
760 /* how many preopen streams we have */
761 unsigned int pre_open_streams;
763 /* How many streams I support coming into me */
764 unsigned int max_inbound_streams;
766 /* the cookie life I award for any cookie, in seconds */
767 unsigned int cookie_life;
768 /* time to delay acks for */
769 unsigned int delayed_ack;
770 unsigned int old_delayed_ack;
771 unsigned int sack_freq;
772 unsigned int data_pkts_seen;
774 unsigned int numduptsns;
775 int dup_tsns[SCTP_MAX_DUP_TSNS];
776 unsigned int initial_init_rto_max; /* initial RTO for INIT's */
777 unsigned int initial_rto; /* initial send RTO */
778 unsigned int minrto; /* per assoc RTO-MIN */
779 unsigned int maxrto; /* per assoc RTO-MAX */
781 /* authentication fields */
782 sctp_auth_chklist_t *local_auth_chunks;
783 sctp_auth_chklist_t *peer_auth_chunks;
784 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */
785 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */
786 struct sctp_keyhead shared_keys; /* assoc's shared keys */
787 sctp_authinfo_t authinfo; /* randoms, cached keys */
789 * refcnt to block freeing when a sender or receiver is off coping
793 uint32_t chunks_on_out_queue; /* total chunks floating around,
794 * locked by send socket buffer */
796 uint16_t peer_hmac_id; /* peer HMAC id to send */
799 * Being that we have no bag to collect stale cookies, and that we
800 * really would not want to anyway.. we will count them in this
801 * counter. We of course feed them to the pigeons right away (I have
802 * always thought of pigeons as flying rats).
804 uint16_t stale_cookie_count;
807 * For the partial delivery API, if up, invoked this is what last
810 uint16_t str_of_pdapi;
811 uint16_t ssn_of_pdapi;
813 /* counts of actual built streams. Allocation may be more however */
814 /* could re-arrange to optimize space here. */
815 uint16_t streamincnt;
816 uint16_t streamoutcnt;
818 /* my maximum number of retrans of INIT and SEND */
819 /* copied from SCTP but should be individually setable */
820 uint16_t max_init_times;
821 uint16_t max_send_times;
823 uint16_t def_net_failure;
826 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is
829 uint16_t asconf_sent; /* possibly removable REM */
830 uint16_t mapping_array_size;
832 uint16_t last_strm_seq_delivered;
833 uint16_t last_strm_no_delivered;
835 uint16_t last_revoke_count;
836 int16_t num_send_timers_up;
838 uint16_t stream_locked_on;
839 uint16_t ecn_echo_cnt_onq;
841 uint16_t free_chunk_cnt;
843 uint8_t stream_locked;
844 uint8_t authenticated; /* packet authenticated ok */
846 * This flag indicates that a SACK need to be sent. Initially this
847 * is 1 to send the first sACK immediately.
851 /* max burst after fast retransmit completes */
854 uint8_t sat_network; /* RTT is in range of sat net or greater */
855 uint8_t sat_network_lockout; /* lockout code */
856 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */
857 /* flag goes on when we are doing a partial delivery api */
858 uint8_t hb_random_values[4];
859 uint8_t fragmented_delivery_inprogress;
860 uint8_t fragment_flags;
861 uint8_t last_flags_delivered;
862 uint8_t hb_ect_randombit;
863 uint8_t hb_random_idx;
864 uint8_t hb_is_disabled; /* is the hb disabled? */
867 /* ECN Nonce stuff */
868 uint8_t receiver_nonce_sum; /* nonce I sum and put in my sack */
869 uint8_t ecn_nonce_allowed; /* Tells us if ECN nonce is on */
870 uint8_t nonce_sum_check;/* On off switch used during re-sync */
871 uint8_t nonce_wait_for_ecne; /* flag when we expect a ECN */
872 uint8_t peer_supports_ecn_nonce;
875 * This value, plus all other ack'd but above cum-ack is added
876 * together to cross check against the bit that we have yet to
877 * define (probably in the SACK). When the cum-ack is updated, this
878 * sum is updated as well.
880 uint8_t nonce_sum_expect_base;
881 /* Flag to tell if ECN is allowed */
884 /* flag to indicate if peer can do asconf */
885 uint8_t peer_supports_asconf;
886 /* pr-sctp support flag */
887 uint8_t peer_supports_prsctp;
888 /* peer authentication support flag */
889 uint8_t peer_supports_auth;
890 /* stream resets are supported by the peer */
891 uint8_t peer_supports_strreset;
894 * packet drop's are supported by the peer, we don't really care
895 * about this but we bookkeep it anyway.
897 uint8_t peer_supports_pktdrop;
899 /* Do we allow V6/V4? */
900 uint8_t ipv4_addr_legal;
901 uint8_t ipv6_addr_legal;
902 /* Address scoping flags */
903 /* scope value for IPv4 */
904 uint8_t ipv4_local_scope;
905 /* scope values for IPv6 */
909 uint8_t loopback_scope;
910 /* flags to handle send alternate net tracking */
911 uint8_t used_alt_onsack;
912 uint8_t used_alt_asconfack;
913 uint8_t fast_retran_loss_recovery;
914 uint8_t sat_t3_loss_recovery;
915 uint8_t dropped_special_cnt;
916 uint8_t seen_a_sack_this_pkt;
917 uint8_t stream_reset_outstanding;
918 uint8_t stream_reset_out_is_outstanding;
919 uint8_t delayed_connection;
920 uint8_t ifp_had_enobuf;
921 uint8_t saw_sack_with_frags;
922 uint8_t in_restart_hash;
923 uint8_t assoc_up_sent;
925 uint8_t cmt_dac_pkts_rcvd;
926 uint8_t sctp_cmt_on_off;
927 uint8_t iam_blocking;
928 uint8_t cookie_how[8];
930 * The mapping array is used to track out of order sequences above
931 * last_acked_seq. 0 indicates packet missing 1 indicates packet
932 * rec'd. We slide it up every time we raise last_acked_seq and 0
933 * trailing locactions out. If I get a TSN above the array
934 * mappingArraySz, I discard the datagram and let retransmit happen.
936 uint32_t marked_retrans;
940 uint32_t timoshutdown;
941 uint32_t timoheartbeat;
943 uint32_t timoshutdownack;
944 struct timeval start_time;
945 struct timeval discontinuity_time;