1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* $KAME: sctp_structs.h,v 1.13 2005/03/06 16:04:18 itojun Exp $ */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #ifndef __sctp_structs_h__ 39 #define __sctp_structs_h__ 40 41 #include <netinet/sctp_os.h> 42 #include <netinet/sctp_header.h> 43 #include <netinet/sctp_auth.h> 44 45 struct sctp_timer { 46 sctp_os_timer_t timer; 47 48 int type; 49 /* 50 * Depending on the timer type these will be setup and cast with the 51 * appropriate entity. 52 */ 53 void *ep; 54 void *tcb; 55 void *net; 56 void *vnet; 57 58 /* for sanity checking */ 59 void *self; 60 uint32_t ticks; 61 uint32_t stopped_from; 62 }; 63 64 65 struct sctp_foo_stuff { 66 struct sctp_inpcb *inp; 67 uint32_t lineno; 68 uint32_t ticks; 69 int updown; 70 }; 71 72 73 /* 74 * This is the information we track on each interface that we know about from 75 * the distant end. 76 */ 77 TAILQ_HEAD(sctpnetlisthead, sctp_nets); 78 79 struct sctp_stream_reset_list { 80 TAILQ_ENTRY(sctp_stream_reset_list) next_resp; 81 uint32_t tsn; 82 int number_entries; 83 struct sctp_stream_reset_out_request req; 84 }; 85 86 TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list); 87 88 /* 89 * Users of the iterator need to malloc a iterator with a call to 90 * sctp_initiate_iterator(inp_func, assoc_func, inp_func, pcb_flags, pcb_features, 91 * asoc_state, void-ptr-arg, uint32-arg, end_func, inp); 92 * 93 * Use the following two defines if you don't care what pcb flags are on the EP 94 * and/or you don't care what state the association is in. 95 * 96 * Note that if you specify an INP as the last argument then ONLY each 97 * association of that single INP will be executed upon. Note that the pcb 98 * flags STILL apply so if the inp you specify has different pcb_flags then 99 * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to 100 * assure the inp you specify gets treated. 101 */ 102 #define SCTP_PCB_ANY_FLAGS 0x00000000 103 #define SCTP_PCB_ANY_FEATURES 0x00000000 104 #define SCTP_ASOC_ANY_STATE 0x00000000 105 106 typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr, 107 uint32_t val); 108 typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val); 109 typedef void (*end_func) (void *ptr, uint32_t val); 110 111 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 112 /* whats on the mcore control struct */ 113 struct sctp_mcore_queue { 114 TAILQ_ENTRY(sctp_mcore_queue) next; 115 struct vnet *vn; 116 struct mbuf *m; 117 int off; 118 int v6; 119 }; 120 121 TAILQ_HEAD(sctp_mcore_qhead, sctp_mcore_queue); 122 123 struct sctp_mcore_ctrl { 124 SCTP_PROCESS_STRUCT thread_proc; 125 struct sctp_mcore_qhead que; 126 struct mtx core_mtx; 127 struct mtx que_mtx; 128 int running; 129 int cpuid; 130 }; 131 132 133 #endif 134 135 136 struct sctp_iterator { 137 TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr; 138 struct vnet *vn; 139 struct sctp_timer tmr; 140 struct sctp_inpcb *inp; /* current endpoint */ 141 struct sctp_tcb *stcb; /* current* assoc */ 142 struct sctp_inpcb *next_inp; /* special hook to skip to */ 143 asoc_func function_assoc; /* per assoc function */ 144 inp_func function_inp; /* per endpoint function */ 145 inp_func function_inp_end; /* end INP function */ 146 end_func function_atend;/* iterator completion function */ 147 void *pointer; /* pointer for apply func to use */ 148 uint32_t val; /* value for apply func to use */ 149 uint32_t pcb_flags; /* endpoint flags being checked */ 150 uint32_t pcb_features; /* endpoint features being checked */ 151 uint32_t asoc_state; /* assoc state being checked */ 152 uint32_t iterator_flags; 153 uint8_t no_chunk_output; 154 uint8_t done_current_ep; 155 }; 156 157 /* iterator_flags values */ 158 #define SCTP_ITERATOR_DO_ALL_INP 0x00000001 159 #define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002 160 161 162 TAILQ_HEAD(sctpiterators, sctp_iterator); 163 164 struct sctp_copy_all { 165 struct sctp_inpcb *inp; /* ep */ 166 struct mbuf *m; 167 struct sctp_sndrcvinfo sndrcv; 168 int sndlen; 169 int cnt_sent; 170 int cnt_failed; 171 }; 172 173 struct sctp_asconf_iterator { 174 struct sctpladdr list_of_work; 175 int cnt; 176 }; 177 178 struct iterator_control { 179 struct mtx ipi_iterator_wq_mtx; 180 struct mtx it_mtx; 181 SCTP_PROCESS_STRUCT thread_proc; 182 struct sctpiterators iteratorhead; 183 struct sctp_iterator *cur_it; 184 uint32_t iterator_running; 185 uint32_t iterator_flags; 186 }; 187 188 #define SCTP_ITERATOR_MUST_EXIT 0x00000001 189 #define SCTP_ITERATOR_STOP_CUR_IT 0x00000002 190 #define SCTP_ITERATOR_STOP_CUR_INP 0x00000004 191 192 struct sctp_net_route { 193 sctp_rtentry_t *ro_rt; 194 void *ro_lle; 195 union sctp_sockstore _l_addr; /* remote peer addr */ 196 struct sctp_ifa *_s_addr; /* our selected src addr */ 197 }; 198 199 struct htcp { 200 uint16_t alpha; /* Fixed point arith, << 7 */ 201 uint8_t beta; /* Fixed point arith, << 7 */ 202 uint8_t modeswitch; /* Delay modeswitch until we had at least one 203 * congestion event */ 204 uint32_t last_cong; /* Time since last congestion event end */ 205 uint32_t undo_last_cong; 206 uint16_t bytes_acked; 207 uint32_t bytecount; 208 uint32_t minRTT; 209 uint32_t maxRTT; 210 211 uint32_t undo_maxRTT; 212 uint32_t undo_old_maxB; 213 214 /* Bandwidth estimation */ 215 uint32_t minB; 216 uint32_t maxB; 217 uint32_t old_maxB; 218 uint32_t Bi; 219 uint32_t lasttime; 220 }; 221 222 struct rtcc_cc { 223 struct timeval tls; /* The time we started the sending */ 224 uint64_t lbw; /* Our last estimated bw */ 225 uint64_t lbw_rtt; /* RTT at bw estimate */ 226 uint64_t bw_bytes; /* The total bytes since this sending began */ 227 uint64_t bw_tot_time; /* The total time since sending began */ 228 uint64_t new_tot_time; /* temp holding the new value */ 229 uint64_t bw_bytes_at_last_rttc; /* What bw_bytes was at last rtt calc */ 230 uint32_t cwnd_at_bw_set;/* Cwnd at last bw saved - lbw */ 231 uint32_t vol_reduce; /* cnt of voluntary reductions */ 232 uint16_t steady_step; /* The number required to be in steady state */ 233 uint16_t step_cnt; /* The current number */ 234 uint8_t ret_from_eq; /* When all things are equal what do I return 235 * 0/1 - 1 no cc advance */ 236 uint8_t use_dccc_ecn; /* Flag to enable DCCC ECN */ 237 uint8_t tls_needs_set; /* Flag to indicate we need to set tls 0 or 1 238 * means set at send 2 not */ 239 uint8_t last_step_state;/* Last state if steady state stepdown is on */ 240 uint8_t rtt_set_this_sack; /* Flag saying this sack had RTT calc 241 * on it */ 242 uint8_t last_inst_ind; /* Last saved inst indication */ 243 }; 244 245 246 struct sctp_nets { 247 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */ 248 249 /* 250 * Things on the top half may be able to be split into a common 251 * structure shared by all. 252 */ 253 struct sctp_timer pmtu_timer; 254 255 /* 256 * The following two in combination equate to a route entry for v6 257 * or v4. 258 */ 259 struct sctp_net_route ro; 260 261 /* mtu discovered so far */ 262 uint32_t mtu; 263 uint32_t ssthresh; /* not sure about this one for split */ 264 uint32_t last_cwr_tsn; 265 uint32_t cwr_window_tsn; 266 uint32_t ecn_ce_pkt_cnt; 267 uint32_t lost_cnt; 268 /* smoothed average things for RTT and RTO itself */ 269 int lastsa; 270 int lastsv; 271 uint64_t rtt; /* last measured rtt value in us */ 272 unsigned int RTO; 273 274 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */ 275 struct sctp_timer rxt_timer; 276 struct sctp_timer fr_timer; /* for early fr */ 277 278 /* last time in seconds I sent to it */ 279 struct timeval last_sent_time; 280 union cc_control_data { 281 struct htcp htcp_ca; /* JRS - struct used in HTCP algorithm */ 282 struct rtcc_cc rtcc; /* rtcc module cc stuff */ 283 } cc_mod; 284 int ref_count; 285 286 /* Congestion stats per destination */ 287 /* 288 * flight size variables and such, sorry Vern, I could not avoid 289 * this if I wanted performance :> 290 */ 291 uint32_t flight_size; 292 uint32_t cwnd; /* actual cwnd */ 293 uint32_t prev_cwnd; /* cwnd before any processing */ 294 uint32_t ecn_prev_cwnd; /* ECN prev cwnd at first ecn_echo seen in new 295 * window */ 296 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */ 297 /* tracking variables to avoid the aloc/free in sack processing */ 298 unsigned int net_ack; 299 unsigned int net_ack2; 300 301 /* 302 * JRS - 5/8/07 - Variable to track last time a destination was 303 * active for CMT PF 304 */ 305 uint32_t last_active; 306 307 /* 308 * CMT variables (iyengar@cis.udel.edu) 309 */ 310 uint32_t this_sack_highest_newack; /* tracks highest TSN newly 311 * acked for a given dest in 312 * the current SACK. Used in 313 * SFR and HTNA algos */ 314 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected 315 * pseudo-cumack for this destination */ 316 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next 317 * expected pseudo-cumack for this 318 * destination */ 319 320 /* CMT fast recovery variables */ 321 uint32_t fast_recovery_tsn; 322 uint32_t heartbeat_random1; 323 uint32_t heartbeat_random2; 324 uint32_t tos_flowlabel; 325 326 struct timeval start_time; /* time when this net was created */ 327 uint32_t marked_retrans;/* number or DATA chunks marked for timer 328 * based retransmissions */ 329 uint32_t marked_fastretrans; 330 331 /* if this guy is ok or not ... status */ 332 uint16_t dest_state; 333 /* number of transmit failures to down this guy */ 334 uint16_t failure_threshold; 335 /* error stats on destination */ 336 uint16_t error_count; 337 /* UDP port number in case of UDP tunneling */ 338 uint16_t port; 339 340 uint8_t fast_retran_loss_recovery; 341 uint8_t will_exit_fast_recovery; 342 /* Flags that probably can be combined into dest_state */ 343 uint8_t fast_retran_ip; /* fast retransmit in progress */ 344 uint8_t hb_responded; 345 uint8_t saw_newack; /* CMT's SFR algorithm flag */ 346 uint8_t src_addr_selected; /* if we split we move */ 347 uint8_t indx_of_eligible_next_to_use; 348 uint8_t addr_is_local; /* its a local address (if known) could move 349 * in split */ 350 351 /* 352 * CMT variables (iyengar@cis.udel.edu) 353 */ 354 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to 355 * find a new pseudocumack. This flag 356 * is set after a new pseudo-cumack 357 * has been received and indicates 358 * that the sender should find the 359 * next pseudo-cumack expected for 360 * this destination */ 361 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to 362 * find a new rtx-pseudocumack. This 363 * flag is set after a new 364 * rtx-pseudo-cumack has been received 365 * and indicates that the sender 366 * should find the next 367 * rtx-pseudo-cumack expected for this 368 * destination */ 369 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to 370 * indicate if a new pseudo-cumack or 371 * rtx-pseudo-cumack has been received */ 372 uint8_t window_probe; /* Doing a window probe? */ 373 uint8_t RTO_measured; /* Have we done the first measure */ 374 uint8_t last_hs_used; /* index into the last HS table entry we used */ 375 uint8_t lan_type; 376 uint8_t rto_needed; 377 uint32_t flowid; 378 #ifdef INVARIANTS 379 uint8_t flowidset; 380 #endif 381 }; 382 383 384 struct sctp_data_chunkrec { 385 uint32_t TSN_seq; /* the TSN of this transmit */ 386 uint16_t stream_seq; /* the stream sequence number of this transmit */ 387 uint16_t stream_number; /* the stream number of this guy */ 388 uint32_t payloadtype; 389 uint32_t context; /* from send */ 390 uint32_t cwnd_at_send; 391 /* 392 * part of the Highest sacked algorithm to be able to stroke counts 393 * on ones that are FR'd. 394 */ 395 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 396 struct timeval timetodrop; /* time we drop it from queue */ 397 uint8_t doing_fast_retransmit; 398 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 399 * outbound holds sending flags for PR-SCTP. */ 400 uint8_t state_flags; 401 uint8_t chunk_was_revoked; 402 uint8_t fwd_tsn_cnt; 403 }; 404 405 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 406 407 /* The lower byte is used to enumerate PR_SCTP policies */ 408 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 409 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 410 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 411 412 /* The upper byte is used a a bit mask */ 413 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100 414 415 struct chk_id { 416 uint16_t id; 417 uint16_t can_take_data; 418 }; 419 420 421 struct sctp_tmit_chunk { 422 union { 423 struct sctp_data_chunkrec data; 424 struct chk_id chunk_id; 425 } rec; 426 struct sctp_association *asoc; /* bp to asoc this belongs to */ 427 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 428 struct mbuf *data; /* pointer to mbuf chain of data */ 429 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 430 struct sctp_nets *whoTo; 431 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 432 int32_t sent; /* the send status */ 433 uint16_t snd_count; /* number of times I sent */ 434 uint16_t flags; /* flags, such as FRAGMENT_OK */ 435 uint16_t send_size; 436 uint16_t book_size; 437 uint16_t mbcnt; 438 uint16_t auth_keyid; 439 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */ 440 uint8_t pad_inplace; 441 uint8_t do_rtt; 442 uint8_t book_size_scale; 443 uint8_t no_fr_allowed; 444 uint8_t pr_sctp_on; 445 uint8_t copy_by_ref; 446 uint8_t window_probe; 447 }; 448 449 /* 450 * The first part of this structure MUST be the entire sinfo structure. Maybe 451 * I should have made it a sub structure... we can circle back later and do 452 * that if we want. 453 */ 454 struct sctp_queued_to_read { /* sinfo structure Pluse more */ 455 uint16_t sinfo_stream; /* off the wire */ 456 uint16_t sinfo_ssn; /* off the wire */ 457 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for 458 * EOR */ 459 uint32_t sinfo_ppid; /* off the wire */ 460 uint32_t sinfo_context; /* pick this up from assoc def context? */ 461 uint32_t sinfo_timetolive; /* not used by kernel */ 462 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */ 463 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */ 464 sctp_assoc_t sinfo_assoc_id; /* our assoc id */ 465 /* Non sinfo stuff */ 466 uint32_t length; /* length of data */ 467 uint32_t held_length; /* length held in sb */ 468 struct sctp_nets *whoFrom; /* where it came from */ 469 struct mbuf *data; /* front of the mbuf chain of data with 470 * PKT_HDR */ 471 struct mbuf *tail_mbuf; /* used for multi-part data */ 472 struct mbuf *aux_data; /* used to hold/cache control if o/s does not 473 * take it from us */ 474 struct sctp_tcb *stcb; /* assoc, used for window update */ 475 TAILQ_ENTRY(sctp_queued_to_read) next; 476 uint16_t port_from; 477 uint16_t spec_flags; /* Flags to hold the notification field */ 478 uint8_t do_not_ref_stcb; 479 uint8_t end_added; 480 uint8_t pdapi_aborted; 481 uint8_t some_taken; 482 }; 483 484 /* This data structure will be on the outbound 485 * stream queues. Data will be pulled off from 486 * the front of the mbuf data and chunk-ified 487 * by the output routines. We will custom 488 * fit every chunk we pull to the send/sent 489 * queue to make up the next full packet 490 * if we can. An entry cannot be removed 491 * from the stream_out queue until 492 * the msg_is_complete flag is set. This 493 * means at times data/tail_mbuf MIGHT 494 * be NULL.. If that occurs it happens 495 * for one of two reasons. Either the user 496 * is blocked on a send() call and has not 497 * awoken to copy more data down... OR 498 * the user is in the explict MSG_EOR mode 499 * and wrote some data, but has not completed 500 * sending. 501 */ 502 struct sctp_stream_queue_pending { 503 struct mbuf *data; 504 struct mbuf *tail_mbuf; 505 struct timeval ts; 506 struct sctp_nets *net; 507 TAILQ_ENTRY(sctp_stream_queue_pending) next; 508 TAILQ_ENTRY(sctp_stream_queue_pending) ss_next; 509 uint32_t length; 510 uint32_t timetolive; 511 uint32_t ppid; 512 uint32_t context; 513 uint16_t sinfo_flags; 514 uint16_t stream; 515 uint16_t strseq; 516 uint16_t act_flags; 517 uint16_t auth_keyid; 518 uint8_t holds_key_ref; 519 uint8_t msg_is_complete; 520 uint8_t some_taken; 521 uint8_t pr_sctp_on; 522 uint8_t sender_all_done; 523 uint8_t put_last_out; 524 uint8_t discard_rest; 525 }; 526 527 /* 528 * this struct contains info that is used to track inbound stream data and 529 * help with ordering. 530 */ 531 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 532 struct sctp_stream_in { 533 struct sctp_readhead inqueue; 534 uint16_t stream_no; 535 uint16_t last_sequence_delivered; /* used for re-order */ 536 uint8_t delivery_started; 537 }; 538 539 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 540 TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending); 541 542 /* Round-robin schedulers */ 543 struct ss_rr { 544 /* next link in wheel */ 545 TAILQ_ENTRY(sctp_stream_out) next_spoke; 546 }; 547 548 /* Priority scheduler */ 549 struct ss_prio { 550 /* next link in wheel */ 551 TAILQ_ENTRY(sctp_stream_out) next_spoke; 552 /* priority id */ 553 uint16_t priority; 554 }; 555 556 /* Fair Bandwidth scheduler */ 557 struct ss_fb { 558 /* next link in wheel */ 559 TAILQ_ENTRY(sctp_stream_out) next_spoke; 560 /* stores message size */ 561 int32_t rounds; 562 }; 563 564 /* 565 * This union holds all data necessary for 566 * different stream schedulers. 567 */ 568 union scheduling_data { 569 struct sctpwheel_listhead out_wheel; 570 struct sctplist_listhead out_list; 571 }; 572 573 /* 574 * This union holds all parameters per stream 575 * necessary for different stream schedulers. 576 */ 577 union scheduling_parameters { 578 struct ss_rr rr; 579 struct ss_prio prio; 580 struct ss_fb fb; 581 }; 582 583 /* This struct is used to track the traffic on outbound streams */ 584 struct sctp_stream_out { 585 struct sctp_streamhead outqueue; 586 union scheduling_parameters ss_params; 587 uint16_t stream_no; 588 uint16_t next_sequence_sent; /* next one I expect to send out */ 589 uint8_t last_msg_incomplete; 590 }; 591 592 /* used to keep track of the addresses yet to try to add/delete */ 593 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 594 struct sctp_asconf_addr { 595 TAILQ_ENTRY(sctp_asconf_addr) next; 596 struct sctp_asconf_addr_param ap; 597 struct sctp_ifa *ifa; /* save the ifa for add/del ip */ 598 uint8_t sent; /* has this been sent yet? */ 599 uint8_t special_del; /* not to be used in lookup */ 600 }; 601 602 struct sctp_scoping { 603 uint8_t ipv4_addr_legal; 604 uint8_t ipv6_addr_legal; 605 uint8_t loopback_scope; 606 uint8_t ipv4_local_scope; 607 uint8_t local_scope; 608 uint8_t site_scope; 609 }; 610 611 #define SCTP_TSN_LOG_SIZE 40 612 613 struct sctp_tsn_log { 614 void *stcb; 615 uint32_t tsn; 616 uint16_t strm; 617 uint16_t seq; 618 uint16_t sz; 619 uint16_t flgs; 620 uint16_t in_pos; 621 uint16_t in_out; 622 }; 623 624 #define SCTP_FS_SPEC_LOG_SIZE 200 625 struct sctp_fs_spec_log { 626 uint32_t sent; 627 uint32_t total_flight; 628 uint32_t tsn; 629 uint16_t book; 630 uint8_t incr; 631 uint8_t decr; 632 }; 633 634 /* This struct is here to cut out the compatiabilty 635 * pad that bulks up both the inp and stcb. The non 636 * pad portion MUST stay in complete sync with 637 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added 638 * this must be done here too. 639 */ 640 struct sctp_nonpad_sndrcvinfo { 641 uint16_t sinfo_stream; 642 uint16_t sinfo_ssn; 643 uint16_t sinfo_flags; 644 uint32_t sinfo_ppid; 645 uint32_t sinfo_context; 646 uint32_t sinfo_timetolive; 647 uint32_t sinfo_tsn; 648 uint32_t sinfo_cumtsn; 649 sctp_assoc_t sinfo_assoc_id; 650 }; 651 652 /* 653 * JRS - Structure to hold function pointers to the functions responsible 654 * for congestion control. 655 */ 656 657 struct sctp_cc_functions { 658 void (*sctp_set_initial_cc_param) (struct sctp_tcb *stcb, struct sctp_nets *net); 659 void (*sctp_cwnd_update_after_sack) (struct sctp_tcb *stcb, 660 struct sctp_association *asoc, 661 int accum_moved, int reneged_all, int will_exit); 662 void (*sctp_cwnd_update_after_fr) (struct sctp_tcb *stcb, 663 struct sctp_association *asoc); 664 void (*sctp_cwnd_update_after_timeout) (struct sctp_tcb *stcb, 665 struct sctp_nets *net); 666 void (*sctp_cwnd_update_after_ecn_echo) (struct sctp_tcb *stcb, 667 struct sctp_nets *net, int in_window, int num_pkt_lost); 668 void (*sctp_cwnd_update_after_packet_dropped) (struct sctp_tcb *stcb, 669 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp, 670 uint32_t * bottle_bw, uint32_t * on_queue); 671 void (*sctp_cwnd_update_after_output) (struct sctp_tcb *stcb, 672 struct sctp_nets *net, int burst_limit); 673 void (*sctp_cwnd_update_after_fr_timer) (struct sctp_inpcb *inp, 674 struct sctp_tcb *stcb, struct sctp_nets *net); 675 void (*sctp_cwnd_update_packet_transmitted) (struct sctp_tcb *stcb, 676 struct sctp_nets *net); 677 void (*sctp_cwnd_update_tsn_acknowledged) (struct sctp_nets *net, 678 struct sctp_tmit_chunk *); 679 void (*sctp_cwnd_new_transmission_begins) (struct sctp_tcb *stcb, 680 struct sctp_nets *net); 681 void (*sctp_cwnd_prepare_net_for_sack) (struct sctp_tcb *stcb, 682 struct sctp_nets *net); 683 int (*sctp_cwnd_socket_option) (struct sctp_tcb *stcb, int set, struct sctp_cc_option *); 684 void (*sctp_rtt_calculated) (struct sctp_tcb *, struct sctp_nets *, struct timeval *); 685 }; 686 687 /* 688 * RS - Structure to hold function pointers to the functions responsible 689 * for stream scheduling. 690 */ 691 struct sctp_ss_functions { 692 void (*sctp_ss_init) (struct sctp_tcb *stcb, struct sctp_association *asoc, 693 int holds_lock); 694 void (*sctp_ss_clear) (struct sctp_tcb *stcb, struct sctp_association *asoc, 695 int clear_values, int holds_lock); 696 void (*sctp_ss_init_stream) (struct sctp_stream_out *strq, struct sctp_stream_out *with_strq); 697 void (*sctp_ss_add_to_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 698 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 699 int (*sctp_ss_is_empty) (struct sctp_tcb *stcb, struct sctp_association *asoc); 700 void (*sctp_ss_remove_from_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 701 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 702 struct sctp_stream_out *(*sctp_ss_select_stream) (struct sctp_tcb *stcb, 703 struct sctp_nets *net, struct sctp_association *asoc); 704 void (*sctp_ss_scheduled) (struct sctp_tcb *stcb, struct sctp_nets *net, 705 struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much); 706 void (*sctp_ss_packet_done) (struct sctp_tcb *stcb, struct sctp_nets *net, 707 struct sctp_association *asoc); 708 int (*sctp_ss_get_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 709 struct sctp_stream_out *strq, uint16_t * value); 710 int (*sctp_ss_set_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 711 struct sctp_stream_out *strq, uint16_t value); 712 }; 713 714 /* used to save ASCONF chunks for retransmission */ 715 TAILQ_HEAD(sctp_asconf_head, sctp_asconf); 716 struct sctp_asconf { 717 TAILQ_ENTRY(sctp_asconf) next; 718 uint32_t serial_number; 719 uint16_t snd_count; 720 struct mbuf *data; 721 uint16_t len; 722 }; 723 724 /* used to save ASCONF-ACK chunks for retransmission */ 725 TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack); 726 struct sctp_asconf_ack { 727 TAILQ_ENTRY(sctp_asconf_ack) next; 728 uint32_t serial_number; 729 struct sctp_nets *last_sent_to; 730 struct mbuf *data; 731 uint16_t len; 732 }; 733 734 /* 735 * Here we have information about each individual association that we track. 736 * We probably in production would be more dynamic. But for ease of 737 * implementation we will have a fixed array that we hunt for in a linear 738 * fashion. 739 */ 740 struct sctp_association { 741 /* association state */ 742 int state; 743 744 /* queue of pending addrs to add/delete */ 745 struct sctp_asconf_addrhead asconf_queue; 746 747 struct timeval time_entered; /* time we entered state */ 748 struct timeval time_last_rcvd; 749 struct timeval time_last_sent; 750 struct timeval time_last_sat_advance; 751 struct sctp_nonpad_sndrcvinfo def_send; 752 753 /* timers and such */ 754 struct sctp_timer hb_timer; /* hb timer */ 755 struct sctp_timer dack_timer; /* Delayed ack timer */ 756 struct sctp_timer asconf_timer; /* asconf */ 757 struct sctp_timer strreset_timer; /* stream reset */ 758 struct sctp_timer shut_guard_timer; /* shutdown guard */ 759 struct sctp_timer autoclose_timer; /* automatic close timer */ 760 struct sctp_timer delayed_event_timer; /* timer for delayed events */ 761 struct sctp_timer delete_prim_timer; /* deleting primary dst */ 762 763 /* list of restricted local addresses */ 764 struct sctpladdr sctp_restricted_addrs; 765 766 /* last local address pending deletion (waiting for an address add) */ 767 struct sctp_ifa *asconf_addr_del_pending; 768 /* Deleted primary destination (used to stop timer) */ 769 struct sctp_nets *deleted_primary; 770 771 struct sctpnetlisthead nets; /* remote address list */ 772 773 /* Free chunk list */ 774 struct sctpchunk_listhead free_chunks; 775 776 /* Control chunk queue */ 777 struct sctpchunk_listhead control_send_queue; 778 779 /* ASCONF chunk queue */ 780 struct sctpchunk_listhead asconf_send_queue; 781 782 /* 783 * Once a TSN hits the wire it is moved to the sent_queue. We 784 * maintain two counts here (don't know if any but retran_cnt is 785 * needed). The idea is that the sent_queue_retran_cnt reflects how 786 * many chunks have been marked for retranmission by either T3-rxt 787 * or FR. 788 */ 789 struct sctpchunk_listhead sent_queue; 790 struct sctpchunk_listhead send_queue; 791 792 /* re-assembly queue for fragmented chunks on the inbound path */ 793 struct sctpchunk_listhead reasmqueue; 794 795 /* Scheduling queues */ 796 union scheduling_data ss_data; 797 798 /* 799 * This pointer will be set to NULL most of the time. But when we 800 * have a fragmented message, where we could not get out all of the 801 * message at the last send then this will point to the stream to go 802 * get data from. 803 */ 804 struct sctp_stream_out *locked_on_sending; 805 806 /* If an iterator is looking at me, this is it */ 807 struct sctp_iterator *stcb_starting_point_for_iterator; 808 809 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 810 struct sctp_asconf_ackhead asconf_ack_sent; 811 812 /* 813 * pointer to last stream reset queued to control queue by us with 814 * requests. 815 */ 816 struct sctp_tmit_chunk *str_reset; 817 /* 818 * if Source Address Selection happening, this will rotate through 819 * the link list. 820 */ 821 struct sctp_laddr *last_used_address; 822 823 /* stream arrays */ 824 struct sctp_stream_in *strmin; 825 struct sctp_stream_out *strmout; 826 uint8_t *mapping_array; 827 /* primary destination to use */ 828 struct sctp_nets *primary_destination; 829 /* For CMT */ 830 struct sctp_nets *last_net_cmt_send_started; 831 /* last place I got a data chunk from */ 832 struct sctp_nets *last_data_chunk_from; 833 /* last place I got a control from */ 834 struct sctp_nets *last_control_chunk_from; 835 836 /* circular looking for output selection */ 837 struct sctp_stream_out *last_out_stream; 838 839 /* 840 * wait to the point the cum-ack passes req->send_reset_at_tsn for 841 * any req on the list. 842 */ 843 struct sctp_resethead resetHead; 844 845 /* queue of chunks waiting to be sent into the local stack */ 846 struct sctp_readhead pending_reply_queue; 847 848 /* JRS - the congestion control functions are in this struct */ 849 struct sctp_cc_functions cc_functions; 850 /* 851 * JRS - value to store the currently loaded congestion control 852 * module 853 */ 854 uint32_t congestion_control_module; 855 /* RS - the stream scheduling functions are in this struct */ 856 struct sctp_ss_functions ss_functions; 857 /* RS - value to store the currently loaded stream scheduling module */ 858 uint32_t stream_scheduling_module; 859 860 uint32_t vrf_id; 861 862 uint32_t cookie_preserve_req; 863 /* ASCONF next seq I am sending out, inits at init-tsn */ 864 uint32_t asconf_seq_out; 865 uint32_t asconf_seq_out_acked; 866 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 867 uint32_t asconf_seq_in; 868 869 /* next seq I am sending in str reset messages */ 870 uint32_t str_reset_seq_out; 871 /* next seq I am expecting in str reset messages */ 872 uint32_t str_reset_seq_in; 873 874 /* various verification tag information */ 875 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 876 * by remote end, and I have unlocked this 877 * will be regenerated to a new random value. */ 878 uint32_t peer_vtag; /* The peers last tag */ 879 880 uint32_t my_vtag_nonce; 881 uint32_t peer_vtag_nonce; 882 883 uint32_t assoc_id; 884 885 /* This is the SCTP fragmentation threshold */ 886 uint32_t smallest_mtu; 887 888 /* 889 * Special hook for Fast retransmit, allows us to track the highest 890 * TSN that is NEW in this SACK if gap ack blocks are present. 891 */ 892 uint32_t this_sack_highest_gap; 893 894 /* 895 * The highest consecutive TSN that has been acked by peer on my 896 * sends 897 */ 898 uint32_t last_acked_seq; 899 900 /* The next TSN that I will use in sending. */ 901 uint32_t sending_seq; 902 903 /* Original seq number I used ??questionable to keep?? */ 904 uint32_t init_seq_number; 905 906 907 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 908 /* (A1 in Section 4.2) */ 909 uint32_t advanced_peer_ack_point; 910 911 /* 912 * The highest consequetive TSN at the bottom of the mapping array 913 * (for his sends). 914 */ 915 uint32_t cumulative_tsn; 916 /* 917 * Used to track the mapping array and its offset bits. This MAY be 918 * lower then cumulative_tsn. 919 */ 920 uint32_t mapping_array_base_tsn; 921 /* 922 * used to track highest TSN we have received and is listed in the 923 * mapping array. 924 */ 925 uint32_t highest_tsn_inside_map; 926 927 /* EY - new NR variables used for nr_sack based on mapping_array */ 928 uint8_t *nr_mapping_array; 929 uint32_t highest_tsn_inside_nr_map; 930 931 uint32_t fast_recovery_tsn; 932 uint32_t sat_t3_recovery_tsn; 933 uint32_t tsn_last_delivered; 934 /* 935 * For the pd-api we should re-write this a bit more efficent. We 936 * could have multiple sctp_queued_to_read's that we are building at 937 * once. Now we only do this when we get ready to deliver to the 938 * socket buffer. Note that we depend on the fact that the struct is 939 * "stuck" on the read queue until we finish all the pd-api. 940 */ 941 struct sctp_queued_to_read *control_pdapi; 942 943 uint32_t tsn_of_pdapi_last_delivered; 944 uint32_t pdapi_ppid; 945 uint32_t context; 946 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 947 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 948 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 949 #ifdef SCTP_ASOCLOG_OF_TSNS 950 /* 951 * special log - This adds considerable size to the asoc, but 952 * provides a log that you can use to detect problems via kgdb. 953 */ 954 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE]; 955 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE]; 956 uint32_t cumack_log[SCTP_TSN_LOG_SIZE]; 957 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE]; 958 uint16_t tsn_in_at; 959 uint16_t tsn_out_at; 960 uint16_t tsn_in_wrapped; 961 uint16_t tsn_out_wrapped; 962 uint16_t cumack_log_at; 963 uint16_t cumack_log_atsnt; 964 #endif /* SCTP_ASOCLOG_OF_TSNS */ 965 #ifdef SCTP_FS_SPEC_LOG 966 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE]; 967 uint16_t fs_index; 968 #endif 969 970 /* 971 * window state information and smallest MTU that I use to bound 972 * segmentation 973 */ 974 uint32_t peers_rwnd; 975 uint32_t my_rwnd; 976 uint32_t my_last_reported_rwnd; 977 uint32_t sctp_frag_point; 978 979 uint32_t total_output_queue_size; 980 981 uint32_t sb_cc; /* shadow of sb_cc */ 982 uint32_t sb_send_resv; /* amount reserved on a send */ 983 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd 984 * control */ 985 uint32_t default_flowlabel; 986 uint32_t pr_sctp_cnt; 987 int ctrl_queue_cnt; /* could be removed REM - NO IT CAN'T!! RRS */ 988 /* 989 * All outbound datagrams queue into this list from the individual 990 * stream queue. Here they get assigned a TSN and then await 991 * sending. The stream seq comes when it is first put in the 992 * individual str queue 993 */ 994 unsigned int stream_queue_cnt; 995 unsigned int send_queue_cnt; 996 unsigned int sent_queue_cnt; 997 unsigned int sent_queue_cnt_removeable; 998 /* 999 * Number on sent queue that are marked for retran until this value 1000 * is 0 we only send one packet of retran'ed data. 1001 */ 1002 unsigned int sent_queue_retran_cnt; 1003 1004 unsigned int size_on_reasm_queue; 1005 unsigned int cnt_on_reasm_queue; 1006 unsigned int fwd_tsn_cnt; 1007 /* amount of data (bytes) currently in flight (on all destinations) */ 1008 unsigned int total_flight; 1009 /* Total book size in flight */ 1010 unsigned int total_flight_count; /* count of chunks used with 1011 * book total */ 1012 /* count of destinaton nets and list of destination nets */ 1013 unsigned int numnets; 1014 1015 /* Total error count on this association */ 1016 unsigned int overall_error_count; 1017 1018 unsigned int cnt_msg_on_sb; 1019 1020 /* All stream count of chunks for delivery */ 1021 unsigned int size_on_all_streams; 1022 unsigned int cnt_on_all_streams; 1023 1024 /* Heart Beat delay in ticks */ 1025 unsigned int heart_beat_delay; 1026 1027 /* autoclose */ 1028 unsigned int sctp_autoclose_ticks; 1029 1030 /* how many preopen streams we have */ 1031 unsigned int pre_open_streams; 1032 1033 /* How many streams I support coming into me */ 1034 unsigned int max_inbound_streams; 1035 1036 /* the cookie life I award for any cookie, in seconds */ 1037 unsigned int cookie_life; 1038 /* time to delay acks for */ 1039 unsigned int delayed_ack; 1040 unsigned int old_delayed_ack; 1041 unsigned int sack_freq; 1042 unsigned int data_pkts_seen; 1043 1044 unsigned int numduptsns; 1045 int dup_tsns[SCTP_MAX_DUP_TSNS]; 1046 unsigned int initial_init_rto_max; /* initial RTO for INIT's */ 1047 unsigned int initial_rto; /* initial send RTO */ 1048 unsigned int minrto; /* per assoc RTO-MIN */ 1049 unsigned int maxrto; /* per assoc RTO-MAX */ 1050 1051 /* authentication fields */ 1052 sctp_auth_chklist_t *local_auth_chunks; 1053 sctp_auth_chklist_t *peer_auth_chunks; 1054 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 1055 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 1056 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 1057 sctp_authinfo_t authinfo; /* randoms, cached keys */ 1058 /* 1059 * refcnt to block freeing when a sender or receiver is off coping 1060 * user data in. 1061 */ 1062 uint32_t refcnt; 1063 uint32_t chunks_on_out_queue; /* total chunks floating around, 1064 * locked by send socket buffer */ 1065 uint32_t peers_adaptation; 1066 uint16_t peer_hmac_id; /* peer HMAC id to send */ 1067 1068 /* 1069 * Being that we have no bag to collect stale cookies, and that we 1070 * really would not want to anyway.. we will count them in this 1071 * counter. We of course feed them to the pigeons right away (I have 1072 * always thought of pigeons as flying rats). 1073 */ 1074 uint16_t stale_cookie_count; 1075 1076 /* 1077 * For the partial delivery API, if up, invoked this is what last 1078 * TSN I delivered 1079 */ 1080 uint16_t str_of_pdapi; 1081 uint16_t ssn_of_pdapi; 1082 1083 /* counts of actual built streams. Allocation may be more however */ 1084 /* could re-arrange to optimize space here. */ 1085 uint16_t streamincnt; 1086 uint16_t streamoutcnt; 1087 uint16_t strm_realoutsize; 1088 /* my maximum number of retrans of INIT and SEND */ 1089 /* copied from SCTP but should be individually setable */ 1090 uint16_t max_init_times; 1091 uint16_t max_send_times; 1092 1093 uint16_t def_net_failure; 1094 1095 /* 1096 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 1097 * awaiting ACK 1098 */ 1099 uint16_t mapping_array_size; 1100 1101 uint16_t last_strm_seq_delivered; 1102 uint16_t last_strm_no_delivered; 1103 1104 uint16_t last_revoke_count; 1105 int16_t num_send_timers_up; 1106 1107 uint16_t stream_locked_on; 1108 uint16_t ecn_echo_cnt_onq; 1109 1110 uint16_t free_chunk_cnt; 1111 uint8_t stream_locked; 1112 uint8_t authenticated; /* packet authenticated ok */ 1113 /* 1114 * This flag indicates that a SACK need to be sent. Initially this 1115 * is 1 to send the first sACK immediately. 1116 */ 1117 uint8_t send_sack; 1118 1119 /* max burst of new packets into the network */ 1120 uint32_t max_burst; 1121 /* max burst of fast retransmit packets */ 1122 uint32_t fr_max_burst; 1123 1124 uint8_t sat_network; /* RTT is in range of sat net or greater */ 1125 uint8_t sat_network_lockout; /* lockout code */ 1126 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 1127 /* flag goes on when we are doing a partial delivery api */ 1128 uint8_t hb_random_values[4]; 1129 uint8_t fragmented_delivery_inprogress; 1130 uint8_t fragment_flags; 1131 uint8_t last_flags_delivered; 1132 uint8_t hb_ect_randombit; 1133 uint8_t hb_random_idx; 1134 uint8_t hb_is_disabled; /* is the hb disabled? */ 1135 uint8_t default_tos; 1136 uint8_t asconf_del_pending; /* asconf delete last addr pending */ 1137 1138 /* 1139 * This value, plus all other ack'd but above cum-ack is added 1140 * together to cross check against the bit that we have yet to 1141 * define (probably in the SACK). When the cum-ack is updated, this 1142 * sum is updated as well. 1143 */ 1144 1145 /* Flag to tell if ECN is allowed */ 1146 uint8_t ecn_allowed; 1147 1148 /* flag to indicate if peer can do asconf */ 1149 uint8_t peer_supports_asconf; 1150 /* EY - flag to indicate if peer can do nr_sack */ 1151 uint8_t peer_supports_nr_sack; 1152 /* pr-sctp support flag */ 1153 uint8_t peer_supports_prsctp; 1154 /* peer authentication support flag */ 1155 uint8_t peer_supports_auth; 1156 /* stream resets are supported by the peer */ 1157 uint8_t peer_supports_strreset; 1158 1159 uint8_t peer_supports_nat; 1160 /* 1161 * packet drop's are supported by the peer, we don't really care 1162 * about this but we bookkeep it anyway. 1163 */ 1164 uint8_t peer_supports_pktdrop; 1165 1166 /* Do we allow V6/V4? */ 1167 uint8_t ipv4_addr_legal; 1168 uint8_t ipv6_addr_legal; 1169 /* Address scoping flags */ 1170 /* scope value for IPv4 */ 1171 uint8_t ipv4_local_scope; 1172 /* scope values for IPv6 */ 1173 uint8_t local_scope; 1174 uint8_t site_scope; 1175 /* loopback scope */ 1176 uint8_t loopback_scope; 1177 /* flags to handle send alternate net tracking */ 1178 uint8_t used_alt_onsack; 1179 uint8_t used_alt_asconfack; 1180 uint8_t fast_retran_loss_recovery; 1181 uint8_t sat_t3_loss_recovery; 1182 uint8_t dropped_special_cnt; 1183 uint8_t seen_a_sack_this_pkt; 1184 uint8_t stream_reset_outstanding; 1185 uint8_t stream_reset_out_is_outstanding; 1186 uint8_t delayed_connection; 1187 uint8_t ifp_had_enobuf; 1188 uint8_t saw_sack_with_frags; 1189 uint8_t saw_sack_with_nr_frags; 1190 uint8_t in_asocid_hash; 1191 uint8_t assoc_up_sent; 1192 uint8_t adaptation_needed; 1193 uint8_t adaptation_sent; 1194 /* CMT variables */ 1195 uint8_t cmt_dac_pkts_rcvd; 1196 uint8_t sctp_cmt_on_off; 1197 uint8_t iam_blocking; 1198 uint8_t cookie_how[8]; 1199 /* EY 05/05/08 - NR_SACK variable */ 1200 uint8_t sctp_nr_sack_on_off; 1201 /* JRS 5/21/07 - CMT PF variable */ 1202 uint8_t sctp_cmt_pf; 1203 uint8_t use_precise_time; 1204 /* 1205 * The mapping array is used to track out of order sequences above 1206 * last_acked_seq. 0 indicates packet missing 1 indicates packet 1207 * rec'd. We slide it up every time we raise last_acked_seq and 0 1208 * trailing locactions out. If I get a TSN above the array 1209 * mappingArraySz, I discard the datagram and let retransmit happen. 1210 */ 1211 uint32_t marked_retrans; 1212 uint32_t timoinit; 1213 uint32_t timodata; 1214 uint32_t timosack; 1215 uint32_t timoshutdown; 1216 uint32_t timoheartbeat; 1217 uint32_t timocookie; 1218 uint32_t timoshutdownack; 1219 struct timeval start_time; 1220 struct timeval discontinuity_time; 1221 }; 1222 1223 #endif 1224