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