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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;
147 struct sctp_net_route {
148 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 uint16_t alpha; /* Fixed point arith, << 7 */
156 uint8_t beta; /* Fixed point arith, << 7 */
157 uint8_t modeswitch; /* Delay modeswitch until we had at least one
158 * congestion event */
159 uint32_t last_cong; /* Time since last congestion event end */
160 uint32_t undo_last_cong;
161 uint16_t bytes_acked;
166 uint32_t undo_maxRTT;
167 uint32_t undo_old_maxB;
169 /* Bandwidth estimation */
179 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */
182 * Things on the top half may be able to be split into a common
183 * structure shared by all.
185 struct sctp_timer pmtu_timer;
188 * The following two in combination equate to a route entry for v6
191 struct sctp_net_route ro;
193 /* mtu discovered so far */
195 uint32_t ssthresh; /* not sure about this one for split */
197 /* smoothed average things for RTT and RTO itself */
200 int rtt; /* last measured rtt value in ms */
203 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */
204 struct sctp_timer rxt_timer;
205 struct sctp_timer fr_timer; /* for early fr */
207 /* last time in seconds I sent to it */
208 struct timeval last_sent_time;
211 /* Congestion stats per destination */
213 * flight size variables and such, sorry Vern, I could not avoid
214 * this if I wanted performance :>
216 uint32_t flight_size;
217 uint32_t cwnd; /* actual cwnd */
218 uint32_t prev_cwnd; /* cwnd before any processing */
219 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */
221 /* tracking variables to avoid the aloc/free in sack processing */
222 unsigned int net_ack;
223 unsigned int net_ack2;
226 * JRS - 5/8/07 - Variable to track last time a destination was
229 uint32_t last_active;
232 * CMT variables (iyengar@cis.udel.edu)
234 uint32_t this_sack_highest_newack; /* tracks highest TSN newly
235 * acked for a given dest in
236 * the current SACK. Used in
237 * SFR and HTNA algos */
238 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected
239 * pseudo-cumack for this destination */
240 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next
241 * expected pseudo-cumack for this
244 /* CMT fast recovery variables */
245 uint32_t fast_recovery_tsn;
246 uint32_t heartbeat_random1;
247 uint32_t heartbeat_random2;
248 uint32_t tos_flowlabel;
250 struct timeval start_time; /* time when this net was created */
252 uint32_t marked_retrans;/* number or DATA chunks marked for timer
253 * based retransmissions */
254 uint32_t marked_fastretrans;
256 /* if this guy is ok or not ... status */
258 /* number of transmit failures to down this guy */
259 uint16_t failure_threshold;
260 /* error stats on destination */
261 uint16_t error_count;
262 /* UDP port number in case of UDP tunneling */
265 uint8_t fast_retran_loss_recovery;
266 uint8_t will_exit_fast_recovery;
267 /* Flags that probably can be combined into dest_state */
268 uint8_t fast_retran_ip; /* fast retransmit in progress */
269 uint8_t hb_responded;
270 uint8_t saw_newack; /* CMT's SFR algorithm flag */
271 uint8_t src_addr_selected; /* if we split we move */
272 uint8_t indx_of_eligible_next_to_use;
273 uint8_t addr_is_local; /* its a local address (if known) could move
277 * CMT variables (iyengar@cis.udel.edu)
279 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to
280 * find a new pseudocumack. This flag
281 * is set after a new pseudo-cumack
282 * has been received and indicates
283 * that the sender should find the
284 * next pseudo-cumack expected for
285 * this destination */
286 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to
287 * find a new rtx-pseudocumack. This
288 * flag is set after a new
289 * rtx-pseudo-cumack has been received
290 * and indicates that the sender
291 * should find the next
292 * rtx-pseudo-cumack expected for this
294 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to
295 * indicate if a new pseudo-cumack or
296 * rtx-pseudo-cumack has been received */
297 uint8_t window_probe; /* Doing a window probe? */
298 uint8_t RTO_measured; /* Have we done the first measure */
299 uint8_t last_hs_used; /* index into the last HS table entry we used */
300 /* JRS - struct used in HTCP algorithm */
305 struct sctp_data_chunkrec {
306 uint32_t TSN_seq; /* the TSN of this transmit */
307 uint16_t stream_seq; /* the stream sequence number of this transmit */
308 uint16_t stream_number; /* the stream number of this guy */
309 uint32_t payloadtype;
310 uint32_t context; /* from send */
312 /* ECN Nonce: Nonce Value for this chunk */
316 * part of the Highest sacked algorithm to be able to stroke counts
317 * on ones that are FR'd.
319 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */
320 struct timeval timetodrop; /* time we drop it from queue */
321 uint8_t doing_fast_retransmit;
322 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for
323 * outbound holds sending flags for PR-SCTP. */
325 uint8_t chunk_was_revoked;
328 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk);
330 /* The lower byte is used to enumerate PR_SCTP policies */
331 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL
332 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF
333 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX
335 /* The upper byte is used a a bit mask */
336 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100
340 uint16_t can_take_data;
344 struct sctp_tmit_chunk {
346 struct sctp_data_chunkrec data;
347 struct chk_id chunk_id;
349 struct sctp_association *asoc; /* bp to asoc this belongs to */
350 struct timeval sent_rcv_time; /* filled in if RTT being calculated */
351 struct mbuf *data; /* pointer to mbuf chain of data */
352 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */
353 struct sctp_nets *whoTo;
354 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */
355 int32_t sent; /* the send status */
356 uint16_t snd_count; /* number of times I sent */
357 uint16_t flags; /* flags, such as FRAGMENT_OK */
362 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */
365 uint8_t book_size_scale;
366 uint8_t addr_over; /* flag which is set if the dest address for
367 * this chunk is overridden by user. Used for
368 * CMT (iyengar@cis.udel.edu, 2005/06/21) */
369 uint8_t no_fr_allowed;
372 uint8_t window_probe;
376 * The first part of this structure MUST be the entire sinfo structure. Maybe
377 * I should have made it a sub structure... we can circle back later and do
380 struct sctp_queued_to_read { /* sinfo structure Pluse more */
381 uint16_t sinfo_stream; /* off the wire */
382 uint16_t sinfo_ssn; /* off the wire */
383 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for
385 uint32_t sinfo_ppid; /* off the wire */
386 uint32_t sinfo_context; /* pick this up from assoc def context? */
387 uint32_t sinfo_timetolive; /* not used by kernel */
388 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */
389 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */
390 sctp_assoc_t sinfo_assoc_id; /* our assoc id */
391 /* Non sinfo stuff */
392 uint32_t length; /* length of data */
393 uint32_t held_length; /* length held in sb */
394 struct sctp_nets *whoFrom; /* where it came from */
395 struct mbuf *data; /* front of the mbuf chain of data with
397 struct mbuf *tail_mbuf; /* used for multi-part data */
398 struct mbuf *aux_data; /* used to hold/cache control if o/s does not
400 struct sctp_tcb *stcb; /* assoc, used for window update */
401 TAILQ_ENTRY(sctp_queued_to_read) next;
403 uint16_t spec_flags; /* Flags to hold the notification field */
404 uint8_t do_not_ref_stcb;
406 uint8_t pdapi_aborted;
410 /* This data structure will be on the outbound
411 * stream queues. Data will be pulled off from
412 * the front of the mbuf data and chunk-ified
413 * by the output routines. We will custom
414 * fit every chunk we pull to the send/sent
415 * queue to make up the next full packet
416 * if we can. An entry cannot be removed
417 * from the stream_out queue until
418 * the msg_is_complete flag is set. This
419 * means at times data/tail_mbuf MIGHT
420 * be NULL.. If that occurs it happens
421 * for one of two reasons. Either the user
422 * is blocked on a send() call and has not
423 * awoken to copy more data down... OR
424 * the user is in the explict MSG_EOR mode
425 * and wrote some data, but has not completed
428 struct sctp_stream_queue_pending {
430 struct mbuf *tail_mbuf;
432 struct sctp_nets *net;
433 TAILQ_ENTRY(sctp_stream_queue_pending) next;
438 uint16_t sinfo_flags;
443 uint8_t holds_key_ref;
444 uint8_t msg_is_complete;
448 uint8_t sender_all_done;
449 uint8_t put_last_out;
450 uint8_t discard_rest;
454 * this struct contains info that is used to track inbound stream data and
455 * help with ordering.
457 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in);
458 struct sctp_stream_in {
459 struct sctp_readhead inqueue;
461 uint16_t last_sequence_delivered; /* used for re-order */
462 uint8_t delivery_started;
465 /* This struct is used to track the traffic on outbound streams */
466 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out);
467 struct sctp_stream_out {
468 struct sctp_streamhead outqueue;
469 TAILQ_ENTRY(sctp_stream_out) next_spoke; /* next link in wheel */
471 uint16_t next_sequence_sent; /* next one I expect to send out */
472 uint8_t last_msg_incomplete;
475 /* used to keep track of the addresses yet to try to add/delete */
476 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr);
477 struct sctp_asconf_addr {
478 TAILQ_ENTRY(sctp_asconf_addr) next;
479 struct sctp_asconf_addr_param ap;
480 struct sctp_ifa *ifa; /* save the ifa for add/del ip */
481 uint8_t sent; /* has this been sent yet? */
482 uint8_t special_del; /* not to be used in lookup */
486 struct sctp_scoping {
487 uint8_t ipv4_addr_legal;
488 uint8_t ipv6_addr_legal;
489 uint8_t loopback_scope;
490 uint8_t ipv4_local_scope;
495 #define SCTP_TSN_LOG_SIZE 40
497 struct sctp_tsn_log {
508 #define SCTP_FS_SPEC_LOG_SIZE 200
509 struct sctp_fs_spec_log {
511 uint32_t total_flight;
518 /* This struct is here to cut out the compatiabilty
519 * pad that bulks up both the inp and stcb. The non
520 * pad portion MUST stay in complete sync with
521 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added
522 * this must be done here too.
524 struct sctp_nonpad_sndrcvinfo {
525 uint16_t sinfo_stream;
527 uint16_t sinfo_flags;
529 uint32_t sinfo_context;
530 uint32_t sinfo_timetolive;
532 uint32_t sinfo_cumtsn;
533 sctp_assoc_t sinfo_assoc_id;
537 * JRS - Structure to hold function pointers to the functions responsible
538 * for congestion control.
541 struct sctp_cc_functions {
542 void (*sctp_set_initial_cc_param) (struct sctp_tcb *stcb, struct sctp_nets *net);
543 void (*sctp_cwnd_update_after_sack) (struct sctp_tcb *stcb,
544 struct sctp_association *asoc,
545 int accum_moved, int reneged_all, int will_exit);
546 void (*sctp_cwnd_update_after_fr) (struct sctp_tcb *stcb,
547 struct sctp_association *asoc);
548 void (*sctp_cwnd_update_after_timeout) (struct sctp_tcb *stcb,
549 struct sctp_nets *net);
550 void (*sctp_cwnd_update_after_ecn_echo) (struct sctp_tcb *stcb,
551 struct sctp_nets *net);
552 void (*sctp_cwnd_update_after_packet_dropped) (struct sctp_tcb *stcb,
553 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp,
554 uint32_t * bottle_bw, uint32_t * on_queue);
555 void (*sctp_cwnd_update_after_output) (struct sctp_tcb *stcb,
556 struct sctp_nets *net, int burst_limit);
557 void (*sctp_cwnd_update_after_fr_timer) (struct sctp_inpcb *inp,
558 struct sctp_tcb *stcb, struct sctp_nets *net);
561 /* used to save ASCONF chunks for retransmission */
562 TAILQ_HEAD(sctp_asconf_head, sctp_asconf);
564 TAILQ_ENTRY(sctp_asconf) next;
565 uint32_t serial_number;
571 /* used to save ASCONF-ACK chunks for retransmission */
572 TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack);
573 struct sctp_asconf_ack {
574 TAILQ_ENTRY(sctp_asconf_ack) next;
575 uint32_t serial_number;
576 struct sctp_nets *last_sent_to;
582 * Here we have information about each individual association that we track.
583 * We probably in production would be more dynamic. But for ease of
584 * implementation we will have a fixed array that we hunt for in a linear
587 struct sctp_association {
588 /* association state */
591 /* queue of pending addrs to add/delete */
592 struct sctp_asconf_addrhead asconf_queue;
594 struct timeval time_entered; /* time we entered state */
595 struct timeval time_last_rcvd;
596 struct timeval time_last_sent;
597 struct timeval time_last_sat_advance;
598 struct sctp_nonpad_sndrcvinfo def_send;
600 /* timers and such */
601 struct sctp_timer hb_timer; /* hb timer */
602 struct sctp_timer dack_timer; /* Delayed ack timer */
603 struct sctp_timer asconf_timer; /* asconf */
604 struct sctp_timer strreset_timer; /* stream reset */
605 struct sctp_timer shut_guard_timer; /* shutdown guard */
606 struct sctp_timer autoclose_timer; /* automatic close timer */
607 struct sctp_timer delayed_event_timer; /* timer for delayed events */
608 struct sctp_timer delete_prim_timer; /* deleting primary dst */
610 /* list of restricted local addresses */
611 struct sctpladdr sctp_restricted_addrs;
613 /* last local address pending deletion (waiting for an address add) */
614 struct sctp_ifa *asconf_addr_del_pending;
615 /* Deleted primary destination (used to stop timer) */
616 struct sctp_nets *deleted_primary;
618 struct sctpnetlisthead nets; /* remote address list */
620 /* Free chunk list */
621 struct sctpchunk_listhead free_chunks;
623 /* Control chunk queue */
624 struct sctpchunk_listhead control_send_queue;
626 /* ASCONF chunk queue */
627 struct sctpchunk_listhead asconf_send_queue;
630 * Once a TSN hits the wire it is moved to the sent_queue. We
631 * maintain two counts here (don't know if any but retran_cnt is
632 * needed). The idea is that the sent_queue_retran_cnt reflects how
633 * many chunks have been marked for retranmission by either T3-rxt
636 struct sctpchunk_listhead sent_queue;
637 struct sctpchunk_listhead send_queue;
639 /* re-assembly queue for fragmented chunks on the inbound path */
640 struct sctpchunk_listhead reasmqueue;
643 * this queue is used when we reach a condition that we can NOT put
644 * data into the socket buffer. We track the size of this queue and
645 * set our rwnd to the space in the socket minus also the
646 * size_on_delivery_queue.
648 struct sctpwheel_listhead out_wheel;
651 * This pointer will be set to NULL most of the time. But when we
652 * have a fragmented message, where we could not get out all of the
653 * message at the last send then this will point to the stream to go
656 struct sctp_stream_out *locked_on_sending;
658 /* If an iterator is looking at me, this is it */
659 struct sctp_iterator *stcb_starting_point_for_iterator;
661 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */
662 struct sctp_asconf_ackhead asconf_ack_sent;
665 * pointer to last stream reset queued to control queue by us with
668 struct sctp_tmit_chunk *str_reset;
670 * if Source Address Selection happening, this will rotate through
673 struct sctp_laddr *last_used_address;
676 struct sctp_stream_in *strmin;
677 struct sctp_stream_out *strmout;
678 uint8_t *mapping_array;
679 /* primary destination to use */
680 struct sctp_nets *primary_destination;
682 struct sctp_nets *last_net_cmt_send_started;
683 /* last place I got a data chunk from */
684 struct sctp_nets *last_data_chunk_from;
685 /* last place I got a control from */
686 struct sctp_nets *last_control_chunk_from;
688 /* circular looking for output selection */
689 struct sctp_stream_out *last_out_stream;
692 * wait to the point the cum-ack passes req->send_reset_at_tsn for
693 * any req on the list.
695 struct sctp_resethead resetHead;
697 /* queue of chunks waiting to be sent into the local stack */
698 struct sctp_readhead pending_reply_queue;
700 /* JRS - the congestion control functions are in this struct */
701 struct sctp_cc_functions cc_functions;
703 * JRS - value to store the currently loaded congestion control
706 uint32_t congestion_control_module;
710 uint32_t cookie_preserve_req;
711 /* ASCONF next seq I am sending out, inits at init-tsn */
712 uint32_t asconf_seq_out;
713 uint32_t asconf_seq_out_acked;
714 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */
715 uint32_t asconf_seq_in;
717 /* next seq I am sending in str reset messages */
718 uint32_t str_reset_seq_out;
719 /* next seq I am expecting in str reset messages */
720 uint32_t str_reset_seq_in;
722 /* various verification tag information */
723 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited
724 * by remote end, and I have unlocked this
725 * will be regenerated to a new random value. */
726 uint32_t peer_vtag; /* The peers last tag */
728 uint32_t my_vtag_nonce;
729 uint32_t peer_vtag_nonce;
733 /* This is the SCTP fragmentation threshold */
734 uint32_t smallest_mtu;
737 * Special hook for Fast retransmit, allows us to track the highest
738 * TSN that is NEW in this SACK if gap ack blocks are present.
740 uint32_t this_sack_highest_gap;
743 * The highest consecutive TSN that has been acked by peer on my
746 uint32_t last_acked_seq;
748 /* The next TSN that I will use in sending. */
749 uint32_t sending_seq;
751 /* Original seq number I used ??questionable to keep?? */
752 uint32_t init_seq_number;
755 /* The Advanced Peer Ack Point, as required by the PR-SCTP */
756 /* (A1 in Section 4.2) */
757 uint32_t advanced_peer_ack_point;
760 * The highest consequetive TSN at the bottom of the mapping array
763 uint32_t cumulative_tsn;
765 * Used to track the mapping array and its offset bits. This MAY be
766 * lower then cumulative_tsn.
768 uint32_t mapping_array_base_tsn;
770 * used to track highest TSN we have received and is listed in the
773 uint32_t highest_tsn_inside_map;
775 /* EY - new NR variables used for nr_sack based on mapping_array */
776 uint8_t *nr_mapping_array;
777 uint32_t nr_mapping_array_base_tsn;
778 uint32_t highest_tsn_inside_nr_map;
779 uint16_t nr_mapping_array_size;
781 uint32_t last_echo_tsn;
782 uint32_t last_cwr_tsn;
783 uint32_t fast_recovery_tsn;
784 uint32_t sat_t3_recovery_tsn;
785 uint32_t tsn_last_delivered;
787 * For the pd-api we should re-write this a bit more efficent. We
788 * could have multiple sctp_queued_to_read's that we are building at
789 * once. Now we only do this when we get ready to deliver to the
790 * socket buffer. Note that we depend on the fact that the struct is
791 * "stuck" on the read queue until we finish all the pd-api.
793 struct sctp_queued_to_read *control_pdapi;
795 uint32_t tsn_of_pdapi_last_delivered;
798 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS];
799 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS];
800 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS];
801 #ifdef SCTP_ASOCLOG_OF_TSNS
803 * special log - This adds considerable size to the asoc, but
804 * provides a log that you can use to detect problems via kgdb.
806 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE];
807 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE];
808 uint32_t cumack_log[SCTP_TSN_LOG_SIZE];
809 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE];
812 uint16_t tsn_in_wrapped;
813 uint16_t tsn_out_wrapped;
814 uint16_t cumack_log_at;
815 uint16_t cumack_log_atsnt;
816 #endif /* SCTP_ASOCLOG_OF_TSNS */
817 #ifdef SCTP_FS_SPEC_LOG
818 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE];
823 * window state information and smallest MTU that I use to bound
828 uint32_t my_last_reported_rwnd;
829 uint32_t sctp_frag_point;
831 uint32_t total_output_queue_size;
833 uint32_t sb_cc; /* shadow of sb_cc */
834 uint32_t sb_send_resv; /* amount reserved on a send */
835 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd
837 /* 32 bit nonce stuff */
838 uint32_t nonce_resync_tsn;
839 uint32_t nonce_wait_tsn;
840 uint32_t default_flowlabel;
841 uint32_t pr_sctp_cnt;
842 int ctrl_queue_cnt; /* could be removed REM */
844 * All outbound datagrams queue into this list from the individual
845 * stream queue. Here they get assigned a TSN and then await
846 * sending. The stream seq comes when it is first put in the
847 * individual str queue
849 unsigned int stream_queue_cnt;
850 unsigned int send_queue_cnt;
851 unsigned int sent_queue_cnt;
852 unsigned int sent_queue_cnt_removeable;
854 * Number on sent queue that are marked for retran until this value
855 * is 0 we only send one packet of retran'ed data.
857 unsigned int sent_queue_retran_cnt;
859 unsigned int size_on_reasm_queue;
860 unsigned int cnt_on_reasm_queue;
861 /* amount of data (bytes) currently in flight (on all destinations) */
862 unsigned int total_flight;
863 /* Total book size in flight */
864 unsigned int total_flight_count; /* count of chunks used with
866 /* count of destinaton nets and list of destination nets */
867 unsigned int numnets;
869 /* Total error count on this association */
870 unsigned int overall_error_count;
872 unsigned int cnt_msg_on_sb;
874 /* All stream count of chunks for delivery */
875 unsigned int size_on_all_streams;
876 unsigned int cnt_on_all_streams;
878 /* Heart Beat delay in ticks */
879 unsigned int heart_beat_delay;
882 unsigned int sctp_autoclose_ticks;
884 /* how many preopen streams we have */
885 unsigned int pre_open_streams;
887 /* How many streams I support coming into me */
888 unsigned int max_inbound_streams;
890 /* the cookie life I award for any cookie, in seconds */
891 unsigned int cookie_life;
892 /* time to delay acks for */
893 unsigned int delayed_ack;
894 unsigned int old_delayed_ack;
895 unsigned int sack_freq;
896 unsigned int data_pkts_seen;
898 unsigned int numduptsns;
899 int dup_tsns[SCTP_MAX_DUP_TSNS];
900 unsigned int initial_init_rto_max; /* initial RTO for INIT's */
901 unsigned int initial_rto; /* initial send RTO */
902 unsigned int minrto; /* per assoc RTO-MIN */
903 unsigned int maxrto; /* per assoc RTO-MAX */
905 /* authentication fields */
906 sctp_auth_chklist_t *local_auth_chunks;
907 sctp_auth_chklist_t *peer_auth_chunks;
908 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */
909 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */
910 struct sctp_keyhead shared_keys; /* assoc's shared keys */
911 sctp_authinfo_t authinfo; /* randoms, cached keys */
913 * refcnt to block freeing when a sender or receiver is off coping
917 uint32_t chunks_on_out_queue; /* total chunks floating around,
918 * locked by send socket buffer */
919 uint32_t peers_adaptation;
920 uint16_t peer_hmac_id; /* peer HMAC id to send */
923 * Being that we have no bag to collect stale cookies, and that we
924 * really would not want to anyway.. we will count them in this
925 * counter. We of course feed them to the pigeons right away (I have
926 * always thought of pigeons as flying rats).
928 uint16_t stale_cookie_count;
931 * For the partial delivery API, if up, invoked this is what last
934 uint16_t str_of_pdapi;
935 uint16_t ssn_of_pdapi;
937 /* counts of actual built streams. Allocation may be more however */
938 /* could re-arrange to optimize space here. */
939 uint16_t streamincnt;
940 uint16_t streamoutcnt;
941 uint16_t strm_realoutsize;
942 /* my maximum number of retrans of INIT and SEND */
943 /* copied from SCTP but should be individually setable */
944 uint16_t max_init_times;
945 uint16_t max_send_times;
947 uint16_t def_net_failure;
950 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is
953 uint16_t mapping_array_size;
955 uint16_t last_strm_seq_delivered;
956 uint16_t last_strm_no_delivered;
958 uint16_t last_revoke_count;
959 int16_t num_send_timers_up;
961 uint16_t stream_locked_on;
962 uint16_t ecn_echo_cnt_onq;
964 uint16_t free_chunk_cnt;
966 uint8_t stream_locked;
967 uint8_t authenticated; /* packet authenticated ok */
969 * This flag indicates that a SACK need to be sent. Initially this
970 * is 1 to send the first sACK immediately.
974 /* max burst after fast retransmit completes */
977 uint8_t sat_network; /* RTT is in range of sat net or greater */
978 uint8_t sat_network_lockout; /* lockout code */
979 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */
980 /* flag goes on when we are doing a partial delivery api */
981 uint8_t hb_random_values[4];
982 uint8_t fragmented_delivery_inprogress;
983 uint8_t fragment_flags;
984 uint8_t last_flags_delivered;
985 uint8_t hb_ect_randombit;
986 uint8_t hb_random_idx;
987 uint8_t hb_is_disabled; /* is the hb disabled? */
989 uint8_t asconf_del_pending; /* asconf delete last addr pending */
991 /* ECN Nonce stuff */
992 uint8_t receiver_nonce_sum; /* nonce I sum and put in my sack */
993 uint8_t ecn_nonce_allowed; /* Tells us if ECN nonce is on */
994 uint8_t nonce_sum_check;/* On off switch used during re-sync */
995 uint8_t nonce_wait_for_ecne; /* flag when we expect a ECN */
996 uint8_t peer_supports_ecn_nonce;
999 * This value, plus all other ack'd but above cum-ack is added
1000 * together to cross check against the bit that we have yet to
1001 * define (probably in the SACK). When the cum-ack is updated, this
1002 * sum is updated as well.
1004 uint8_t nonce_sum_expect_base;
1005 /* Flag to tell if ECN is allowed */
1006 uint8_t ecn_allowed;
1008 /* flag to indicate if peer can do asconf */
1009 uint8_t peer_supports_asconf;
1010 /* EY - flag to indicate if peer can do nr_sack */
1011 uint8_t peer_supports_nr_sack;
1012 /* pr-sctp support flag */
1013 uint8_t peer_supports_prsctp;
1014 /* peer authentication support flag */
1015 uint8_t peer_supports_auth;
1016 /* stream resets are supported by the peer */
1017 uint8_t peer_supports_strreset;
1019 uint8_t peer_supports_nat;
1021 * packet drop's are supported by the peer, we don't really care
1022 * about this but we bookkeep it anyway.
1024 uint8_t peer_supports_pktdrop;
1026 /* Do we allow V6/V4? */
1027 uint8_t ipv4_addr_legal;
1028 uint8_t ipv6_addr_legal;
1029 /* Address scoping flags */
1030 /* scope value for IPv4 */
1031 uint8_t ipv4_local_scope;
1032 /* scope values for IPv6 */
1033 uint8_t local_scope;
1035 /* loopback scope */
1036 uint8_t loopback_scope;
1037 /* flags to handle send alternate net tracking */
1038 uint8_t used_alt_onsack;
1039 uint8_t used_alt_asconfack;
1040 uint8_t fast_retran_loss_recovery;
1041 uint8_t sat_t3_loss_recovery;
1042 uint8_t dropped_special_cnt;
1043 uint8_t seen_a_sack_this_pkt;
1044 uint8_t stream_reset_outstanding;
1045 uint8_t stream_reset_out_is_outstanding;
1046 uint8_t delayed_connection;
1047 uint8_t ifp_had_enobuf;
1048 uint8_t saw_sack_with_frags;
1050 uint8_t saw_sack_with_nr_frags;
1051 uint8_t in_asocid_hash;
1052 uint8_t assoc_up_sent;
1053 uint8_t adaptation_needed;
1054 uint8_t adaptation_sent;
1056 uint8_t cmt_dac_pkts_rcvd;
1057 uint8_t sctp_cmt_on_off;
1058 uint8_t iam_blocking;
1059 uint8_t cookie_how[8];
1060 /* EY 05/05/08 - NR_SACK variable */
1061 uint8_t sctp_nr_sack_on_off;
1062 /* JRS 5/21/07 - CMT PF variable */
1063 uint8_t sctp_cmt_pf;
1065 * The mapping array is used to track out of order sequences above
1066 * last_acked_seq. 0 indicates packet missing 1 indicates packet
1067 * rec'd. We slide it up every time we raise last_acked_seq and 0
1068 * trailing locactions out. If I get a TSN above the array
1069 * mappingArraySz, I discard the datagram and let retransmit happen.
1071 uint32_t marked_retrans;
1075 uint32_t timoshutdown;
1076 uint32_t timoheartbeat;
1077 uint32_t timocookie;
1078 uint32_t timoshutdownack;
1079 struct timeval start_time;
1080 struct timeval discontinuity_time;