1/*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: stable/11/sys/netinet/sctp_structs.h 364651 2020-08-24 09:46:36Z tuexen $"); 35 36#ifndef _NETINET_SCTP_STRUCTS_H_ 37#define _NETINET_SCTP_STRUCTS_H_ 38 39#include <netinet/sctp_os.h> 40#include <netinet/sctp_header.h> 41#include <netinet/sctp_auth.h> 42 43struct sctp_timer { 44 sctp_os_timer_t timer; 45 46 int type; 47 /* 48 * Depending on the timer type these will be setup and cast with the 49 * appropriate entity. 50 */ 51 void *ep; 52 void *tcb; 53 void *net; 54 void *vnet; 55 56 /* for sanity checking */ 57 void *self; 58 uint32_t ticks; 59 uint32_t stopped_from; 60}; 61 62 63struct sctp_foo_stuff { 64 struct sctp_inpcb *inp; 65 uint32_t lineno; 66 uint32_t ticks; 67 int updown; 68}; 69 70 71/* 72 * This is the information we track on each interface that we know about from 73 * the distant end. 74 */ 75TAILQ_HEAD(sctpnetlisthead, sctp_nets); 76 77struct sctp_stream_reset_list { 78 TAILQ_ENTRY(sctp_stream_reset_list) next_resp; 79 uint32_t seq; 80 uint32_t tsn; 81 uint32_t number_entries; 82 uint16_t list_of_streams[]; 83}; 84 85TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list); 86 87/* 88 * Users of the iterator need to malloc a iterator with a call to 89 * sctp_initiate_iterator(inp_func, assoc_func, inp_func, pcb_flags, pcb_features, 90 * asoc_state, void-ptr-arg, uint32-arg, end_func, inp); 91 * 92 * Use the following two defines if you don't care what pcb flags are on the EP 93 * and/or you don't care what state the association is in. 94 * 95 * Note that if you specify an INP as the last argument then ONLY each 96 * association of that single INP will be executed upon. Note that the pcb 97 * flags STILL apply so if the inp you specify has different pcb_flags then 98 * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to 99 * assure the inp you specify gets treated. 100 */ 101#define SCTP_PCB_ANY_FLAGS 0x00000000 102#define SCTP_PCB_ANY_FEATURES 0x00000000 103#define SCTP_ASOC_ANY_STATE 0x00000000 104 105typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr, 106 uint32_t val); 107typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val); 108typedef void (*end_func) (void *ptr, uint32_t val); 109 110#if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 111/* whats on the mcore control struct */ 112struct sctp_mcore_queue { 113 TAILQ_ENTRY(sctp_mcore_queue) next; 114 struct vnet *vn; 115 struct mbuf *m; 116 int off; 117 int v6; 118}; 119 120TAILQ_HEAD(sctp_mcore_qhead, sctp_mcore_queue); 121 122struct sctp_mcore_ctrl { 123 SCTP_PROCESS_STRUCT thread_proc; 124 struct sctp_mcore_qhead que; 125 struct mtx core_mtx; 126 struct mtx que_mtx; 127 int running; 128 int cpuid; 129}; 130 131 132#endif 133 134 135struct sctp_iterator { 136 TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr; 137 struct vnet *vn; 138 struct sctp_timer tmr; 139 struct sctp_inpcb *inp; /* current endpoint */ 140 struct sctp_tcb *stcb; /* current* assoc */ 141 struct sctp_inpcb *next_inp; /* special hook to skip to */ 142 asoc_func function_assoc; /* per assoc function */ 143 inp_func function_inp; /* per endpoint function */ 144 inp_func function_inp_end; /* end INP function */ 145 end_func function_atend; /* iterator completion function */ 146 void *pointer; /* pointer for apply func to use */ 147 uint32_t val; /* value for apply func to use */ 148 uint32_t pcb_flags; /* endpoint flags being checked */ 149 uint32_t pcb_features; /* endpoint features being checked */ 150 uint32_t asoc_state; /* assoc state being checked */ 151 uint32_t iterator_flags; 152 uint8_t no_chunk_output; 153 uint8_t done_current_ep; 154}; 155 156/* iterator_flags values */ 157#define SCTP_ITERATOR_DO_ALL_INP 0x00000001 158#define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002 159 160 161TAILQ_HEAD(sctpiterators, sctp_iterator); 162 163struct sctp_copy_all { 164 struct sctp_inpcb *inp; /* ep */ 165 struct mbuf *m; 166 struct sctp_sndrcvinfo sndrcv; 167 ssize_t sndlen; 168 int cnt_sent; 169 int cnt_failed; 170}; 171 172struct sctp_asconf_iterator { 173 struct sctpladdr list_of_work; 174 int cnt; 175}; 176 177struct iterator_control { 178 struct mtx ipi_iterator_wq_mtx; 179 struct mtx it_mtx; 180 SCTP_PROCESS_STRUCT thread_proc; 181 struct sctpiterators iteratorhead; 182 struct sctp_iterator *cur_it; 183 uint32_t iterator_running; 184 uint32_t iterator_flags; 185}; 186#define SCTP_ITERATOR_STOP_CUR_IT 0x00000004 187#define SCTP_ITERATOR_STOP_CUR_INP 0x00000008 188 189struct sctp_net_route { 190 sctp_rtentry_t *ro_rt; 191 struct llentry *ro_lle; 192 char *ro_prepend; 193 uint16_t ro_plen; 194 uint16_t ro_flags; 195 uint16_t ro_mtu; 196 uint16_t spare; 197 union sctp_sockstore _l_addr; /* remote peer addr */ 198 struct sctp_ifa *_s_addr; /* our selected src addr */ 199}; 200 201struct htcp { 202 uint16_t alpha; /* Fixed point arith, << 7 */ 203 uint8_t beta; /* Fixed point arith, << 7 */ 204 uint8_t modeswitch; /* Delay modeswitch until we had at least one 205 * congestion event */ 206 uint32_t last_cong; /* Time since last congestion event end */ 207 uint32_t undo_last_cong; 208 uint16_t bytes_acked; 209 uint32_t bytecount; 210 uint32_t minRTT; 211 uint32_t maxRTT; 212 213 uint32_t undo_maxRTT; 214 uint32_t undo_old_maxB; 215 216 /* Bandwidth estimation */ 217 uint32_t minB; 218 uint32_t maxB; 219 uint32_t old_maxB; 220 uint32_t Bi; 221 uint32_t lasttime; 222}; 223 224struct rtcc_cc { 225 struct timeval tls; /* The time we started the sending */ 226 uint64_t lbw; /* Our last estimated bw */ 227 uint64_t lbw_rtt; /* RTT at bw estimate */ 228 uint64_t bw_bytes; /* The total bytes since this sending began */ 229 uint64_t bw_tot_time; /* The total time since sending began */ 230 uint64_t new_tot_time; /* temp holding the new value */ 231 uint64_t bw_bytes_at_last_rttc; /* What bw_bytes was at last rtt calc */ 232 uint32_t cwnd_at_bw_set; /* Cwnd at last bw saved - lbw */ 233 uint32_t vol_reduce; /* cnt of voluntary reductions */ 234 uint16_t steady_step; /* The number required to be in steady state */ 235 uint16_t step_cnt; /* The current number */ 236 uint8_t ret_from_eq; /* When all things are equal what do I return 237 * 0/1 - 1 no cc advance */ 238 uint8_t use_dccc_ecn; /* Flag to enable DCCC ECN */ 239 uint8_t tls_needs_set; /* Flag to indicate we need to set tls 0 or 1 240 * means set at send 2 not */ 241 uint8_t last_step_state; /* Last state if steady state stepdown 242 * is on */ 243 uint8_t rtt_set_this_sack; /* Flag saying this sack had RTT calc 244 * on it */ 245 uint8_t last_inst_ind; /* Last saved inst indication */ 246}; 247 248 249struct sctp_nets { 250 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */ 251 252 /* 253 * Things on the top half may be able to be split into a common 254 * structure shared by all. 255 */ 256 struct sctp_timer pmtu_timer; 257 struct sctp_timer hb_timer; 258 259 /* 260 * The following two in combination equate to a route entry for v6 261 * or v4. 262 */ 263 struct sctp_net_route ro; 264 265 /* mtu discovered so far */ 266 uint32_t mtu; 267 uint32_t ssthresh; /* not sure about this one for split */ 268 uint32_t last_cwr_tsn; 269 uint32_t cwr_window_tsn; 270 uint32_t ecn_ce_pkt_cnt; 271 uint32_t lost_cnt; 272 /* smoothed average things for RTT and RTO itself */ 273 int lastsa; 274 int lastsv; 275 uint64_t rtt; /* last measured rtt value in us */ 276 unsigned int RTO; 277 278 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */ 279 struct sctp_timer rxt_timer; 280 281 /* last time in seconds I sent to it */ 282 struct timeval last_sent_time; 283 union cc_control_data { 284 struct htcp htcp_ca; /* JRS - struct used in HTCP algorithm */ 285 struct rtcc_cc rtcc; /* rtcc module cc stuff */ 286 } cc_mod; 287 int ref_count; 288 289 /* Congestion stats per destination */ 290 /* 291 * flight size variables and such, sorry Vern, I could not avoid 292 * this if I wanted performance :> 293 */ 294 uint32_t flight_size; 295 uint32_t cwnd; /* actual cwnd */ 296 uint32_t prev_cwnd; /* cwnd before any processing */ 297 uint32_t ecn_prev_cwnd; /* ECN prev cwnd at first ecn_echo seen in new 298 * window */ 299 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */ 300 /* tracking variables to avoid the aloc/free in sack processing */ 301 unsigned int net_ack; 302 unsigned int net_ack2; 303 304 /* 305 * JRS - 5/8/07 - Variable to track last time a destination was 306 * active for CMT PF 307 */ 308 uint32_t last_active; 309 310 /* 311 * CMT variables (iyengar@cis.udel.edu) 312 */ 313 uint32_t this_sack_highest_newack; /* tracks highest TSN newly 314 * acked for a given dest in 315 * the current SACK. Used in 316 * SFR and HTNA algos */ 317 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected 318 * pseudo-cumack for this destination */ 319 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next 320 * expected pseudo-cumack for this 321 * destination */ 322 323 /* CMT fast recovery variables */ 324 uint32_t fast_recovery_tsn; 325 uint32_t heartbeat_random1; 326 uint32_t heartbeat_random2; 327#ifdef INET6 328 uint32_t flowlabel; 329#endif 330 uint8_t dscp; 331 332 struct timeval start_time; /* time when this net was created */ 333 uint32_t marked_retrans; /* number or DATA chunks marked for 334 * timer based retransmissions */ 335 uint32_t marked_fastretrans; 336 uint32_t heart_beat_delay; /* Heart Beat delay in ms */ 337 338 /* if this guy is ok or not ... status */ 339 uint16_t dest_state; 340 /* number of timeouts to consider the destination unreachable */ 341 uint16_t failure_threshold; 342 /* number of timeouts to consider the destination potentially failed */ 343 uint16_t pf_threshold; 344 /* error stats on the destination */ 345 uint16_t error_count; 346 /* UDP port number in case of UDP tunneling */ 347 uint16_t port; 348 349 uint8_t fast_retran_loss_recovery; 350 uint8_t will_exit_fast_recovery; 351 /* Flags that probably can be combined into dest_state */ 352 uint8_t fast_retran_ip; /* fast retransmit in progress */ 353 uint8_t hb_responded; 354 uint8_t saw_newack; /* CMT's SFR algorithm flag */ 355 uint8_t src_addr_selected; /* if we split we move */ 356 uint8_t indx_of_eligible_next_to_use; 357 uint8_t addr_is_local; /* its a local address (if known) could move 358 * in split */ 359 360 /* 361 * CMT variables (iyengar@cis.udel.edu) 362 */ 363 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to 364 * find a new pseudocumack. This flag 365 * is set after a new pseudo-cumack 366 * has been received and indicates 367 * that the sender should find the 368 * next pseudo-cumack expected for 369 * this destination */ 370 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to 371 * find a new rtx-pseudocumack. This 372 * flag is set after a new 373 * rtx-pseudo-cumack has been received 374 * and indicates that the sender 375 * should find the next 376 * rtx-pseudo-cumack expected for this 377 * destination */ 378 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to 379 * indicate if a new pseudo-cumack or 380 * rtx-pseudo-cumack has been received */ 381 uint8_t window_probe; /* Doing a window probe? */ 382 uint8_t RTO_measured; /* Have we done the first measure */ 383 uint8_t last_hs_used; /* index into the last HS table entry we used */ 384 uint8_t lan_type; 385 uint8_t rto_needed; 386 uint32_t flowid; 387 uint8_t flowtype; 388}; 389 390 391struct sctp_data_chunkrec { 392 uint32_t tsn; /* the TSN of this transmit */ 393 uint32_t mid; /* the message identifier of this transmit */ 394 uint16_t sid; /* the stream number of this guy */ 395 uint32_t ppid; 396 uint32_t context; /* from send */ 397 uint32_t cwnd_at_send; 398 /* 399 * part of the Highest sacked algorithm to be able to stroke counts 400 * on ones that are FR'd. 401 */ 402 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 403 struct timeval timetodrop; /* time we drop it from queue */ 404 uint32_t fsn; /* Fragment Sequence Number */ 405 uint8_t doing_fast_retransmit; 406 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 407 * outbound holds sending flags for PR-SCTP. */ 408 uint8_t state_flags; 409 uint8_t chunk_was_revoked; 410 uint8_t fwd_tsn_cnt; 411}; 412 413TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 414 415/* The lower byte is used to enumerate PR_SCTP policies */ 416#define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 417#define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 418#define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 419 420/* The upper byte is used as a bit mask */ 421#define CHUNK_FLAGS_FRAGMENT_OK 0x0100 422 423struct chk_id { 424 uint8_t id; 425 uint8_t can_take_data; 426}; 427 428 429struct sctp_tmit_chunk { 430 union { 431 struct sctp_data_chunkrec data; 432 struct chk_id chunk_id; 433 } rec; 434 struct sctp_association *asoc; /* bp to asoc this belongs to */ 435 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 436 struct mbuf *data; /* pointer to mbuf chain of data */ 437 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 438 struct sctp_nets *whoTo; 439 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 440 int32_t sent; /* the send status */ 441 uint16_t snd_count; /* number of times I sent */ 442 uint16_t flags; /* flags, such as FRAGMENT_OK */ 443 uint16_t send_size; 444 uint16_t book_size; 445 uint16_t mbcnt; 446 uint16_t auth_keyid; 447 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */ 448 uint8_t pad_inplace; 449 uint8_t do_rtt; 450 uint8_t book_size_scale; 451 uint8_t no_fr_allowed; 452 uint8_t copy_by_ref; 453 uint8_t window_probe; 454}; 455 456struct sctp_queued_to_read { /* sinfo structure Pluse more */ 457 uint16_t sinfo_stream; /* off the wire */ 458 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for 459 * EOR */ 460 uint32_t sinfo_ppid; /* off the wire */ 461 uint32_t sinfo_context; /* pick this up from assoc def context? */ 462 uint32_t sinfo_timetolive; /* not used by kernel */ 463 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */ 464 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */ 465 sctp_assoc_t sinfo_assoc_id; /* our assoc id */ 466 /* Non sinfo stuff */ 467 uint32_t mid; /* Fragment Index */ 468 uint32_t length; /* length of data */ 469 uint32_t held_length; /* length held in sb */ 470 uint32_t top_fsn; /* Highest FSN in queue */ 471 uint32_t fsn_included; /* Highest FSN in *data portion */ 472 struct sctp_nets *whoFrom; /* where it came from */ 473 struct mbuf *data; /* front of the mbuf chain of data with 474 * PKT_HDR */ 475 struct mbuf *tail_mbuf; /* used for multi-part data */ 476 struct mbuf *aux_data; /* used to hold/cache control if o/s does not 477 * take it from us */ 478 struct sctp_tcb *stcb; /* assoc, used for window update */ 479 TAILQ_ENTRY(sctp_queued_to_read) next; 480 TAILQ_ENTRY(sctp_queued_to_read) next_instrm; 481 struct sctpchunk_listhead reasm; 482 uint16_t port_from; 483 uint16_t spec_flags; /* Flags to hold the notification field */ 484 uint8_t do_not_ref_stcb; 485 uint8_t end_added; 486 uint8_t pdapi_aborted; 487 uint8_t pdapi_started; 488 uint8_t some_taken; 489 uint8_t last_frag_seen; 490 uint8_t first_frag_seen; 491 uint8_t on_read_q; 492 uint8_t on_strm_q; 493}; 494 495#define SCTP_ON_ORDERED 1 496#define SCTP_ON_UNORDERED 2 497 498/* This data structure will be on the outbound 499 * stream queues. Data will be pulled off from 500 * the front of the mbuf data and chunk-ified 501 * by the output routines. We will custom 502 * fit every chunk we pull to the send/sent 503 * queue to make up the next full packet 504 * if we can. An entry cannot be removed 505 * from the stream_out queue until 506 * the msg_is_complete flag is set. This 507 * means at times data/tail_mbuf MIGHT 508 * be NULL.. If that occurs it happens 509 * for one of two reasons. Either the user 510 * is blocked on a send() call and has not 511 * awoken to copy more data down... OR 512 * the user is in the explict MSG_EOR mode 513 * and wrote some data, but has not completed 514 * sending. 515 */ 516struct sctp_stream_queue_pending { 517 struct mbuf *data; 518 struct mbuf *tail_mbuf; 519 struct timeval ts; 520 struct sctp_nets *net; 521 TAILQ_ENTRY(sctp_stream_queue_pending) next; 522 TAILQ_ENTRY(sctp_stream_queue_pending) ss_next; 523 uint32_t fsn; 524 uint32_t length; 525 uint32_t timetolive; 526 uint32_t ppid; 527 uint32_t context; 528 uint16_t sinfo_flags; 529 uint16_t sid; 530 uint16_t act_flags; 531 uint16_t auth_keyid; 532 uint8_t holds_key_ref; 533 uint8_t msg_is_complete; 534 uint8_t some_taken; 535 uint8_t sender_all_done; 536 uint8_t put_last_out; 537 uint8_t discard_rest; 538 uint8_t processing; 539}; 540 541/* 542 * this struct contains info that is used to track inbound stream data and 543 * help with ordering. 544 */ 545TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 546struct sctp_stream_in { 547 struct sctp_readhead inqueue; 548 struct sctp_readhead uno_inqueue; 549 uint32_t last_mid_delivered; /* used for re-order */ 550 uint16_t sid; 551 uint8_t delivery_started; 552 uint8_t pd_api_started; 553}; 554 555TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 556TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending); 557 558 559/* Round-robin schedulers */ 560struct ss_rr { 561 /* next link in wheel */ 562 TAILQ_ENTRY(sctp_stream_out) next_spoke; 563}; 564 565/* Priority scheduler */ 566struct ss_prio { 567 /* next link in wheel */ 568 TAILQ_ENTRY(sctp_stream_out) next_spoke; 569 /* priority id */ 570 uint16_t priority; 571}; 572 573/* Fair Bandwidth scheduler */ 574struct ss_fb { 575 /* next link in wheel */ 576 TAILQ_ENTRY(sctp_stream_out) next_spoke; 577 /* stores message size */ 578 int32_t rounds; 579}; 580 581/* 582 * This union holds all data necessary for 583 * different stream schedulers. 584 */ 585struct scheduling_data { 586 struct sctp_stream_out *locked_on_sending; 587 /* circular looking for output selection */ 588 struct sctp_stream_out *last_out_stream; 589 union { 590 struct sctpwheel_listhead wheel; 591 struct sctplist_listhead list; 592 } out; 593}; 594 595/* 596 * This union holds all parameters per stream 597 * necessary for different stream schedulers. 598 */ 599union scheduling_parameters { 600 struct ss_rr rr; 601 struct ss_prio prio; 602 struct ss_fb fb; 603}; 604 605/* States for outgoing streams */ 606#define SCTP_STREAM_CLOSED 0x00 607#define SCTP_STREAM_OPENING 0x01 608#define SCTP_STREAM_OPEN 0x02 609#define SCTP_STREAM_RESET_PENDING 0x03 610#define SCTP_STREAM_RESET_IN_FLIGHT 0x04 611 612#define SCTP_MAX_STREAMS_AT_ONCE_RESET 200 613 614/* This struct is used to track the traffic on outbound streams */ 615struct sctp_stream_out { 616 struct sctp_streamhead outqueue; 617 union scheduling_parameters ss_params; 618 uint32_t chunks_on_queues; /* send queue and sent queue */ 619#if defined(SCTP_DETAILED_STR_STATS) 620 uint32_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 621 uint32_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 622#else 623 /* Only the aggregation */ 624 uint32_t abandoned_unsent[1]; 625 uint32_t abandoned_sent[1]; 626#endif 627 /* 628 * For associations using DATA chunks, the lower 16-bit of 629 * next_mid_ordered are used as the next SSN. 630 */ 631 uint32_t next_mid_ordered; 632 uint32_t next_mid_unordered; 633 uint16_t sid; 634 uint8_t last_msg_incomplete; 635 uint8_t state; 636}; 637 638/* used to keep track of the addresses yet to try to add/delete */ 639TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 640struct sctp_asconf_addr { 641 TAILQ_ENTRY(sctp_asconf_addr) next; 642 struct sctp_asconf_addr_param ap; 643 struct sctp_ifa *ifa; /* save the ifa for add/del ip */ 644 uint8_t sent; /* has this been sent yet? */ 645 uint8_t special_del; /* not to be used in lookup */ 646}; 647 648struct sctp_scoping { 649 uint8_t ipv4_addr_legal; 650 uint8_t ipv6_addr_legal; 651 uint8_t loopback_scope; 652 uint8_t ipv4_local_scope; 653 uint8_t local_scope; 654 uint8_t site_scope; 655}; 656 657#define SCTP_TSN_LOG_SIZE 40 658 659struct sctp_tsn_log { 660 void *stcb; 661 uint32_t tsn; 662 uint32_t seq; 663 uint16_t strm; 664 uint16_t sz; 665 uint16_t flgs; 666 uint16_t in_pos; 667 uint16_t in_out; 668 uint16_t resv; 669}; 670 671#define SCTP_FS_SPEC_LOG_SIZE 200 672struct sctp_fs_spec_log { 673 uint32_t sent; 674 uint32_t total_flight; 675 uint32_t tsn; 676 uint16_t book; 677 uint8_t incr; 678 uint8_t decr; 679}; 680 681/* This struct is here to cut out the compatiabilty 682 * pad that bulks up both the inp and stcb. The non 683 * pad portion MUST stay in complete sync with 684 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added 685 * this must be done here too. 686 */ 687struct sctp_nonpad_sndrcvinfo { 688 uint16_t sinfo_stream; 689 uint16_t sinfo_ssn; 690 uint16_t sinfo_flags; 691 uint32_t sinfo_ppid; 692 uint32_t sinfo_context; 693 uint32_t sinfo_timetolive; 694 uint32_t sinfo_tsn; 695 uint32_t sinfo_cumtsn; 696 sctp_assoc_t sinfo_assoc_id; 697 uint16_t sinfo_keynumber; 698 uint16_t sinfo_keynumber_valid; 699}; 700 701/* 702 * JRS - Structure to hold function pointers to the functions responsible 703 * for congestion control. 704 */ 705 706struct sctp_cc_functions { 707 void (*sctp_set_initial_cc_param) (struct sctp_tcb *stcb, struct sctp_nets *net); 708 void (*sctp_cwnd_update_after_sack) (struct sctp_tcb *stcb, 709 struct sctp_association *asoc, 710 int accum_moved, int reneged_all, int will_exit); 711 void (*sctp_cwnd_update_exit_pf) (struct sctp_tcb *stcb, struct sctp_nets *net); 712 void (*sctp_cwnd_update_after_fr) (struct sctp_tcb *stcb, 713 struct sctp_association *asoc); 714 void (*sctp_cwnd_update_after_timeout) (struct sctp_tcb *stcb, 715 struct sctp_nets *net); 716 void (*sctp_cwnd_update_after_ecn_echo) (struct sctp_tcb *stcb, 717 struct sctp_nets *net, int in_window, int num_pkt_lost); 718 void (*sctp_cwnd_update_after_packet_dropped) (struct sctp_tcb *stcb, 719 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp, 720 uint32_t *bottle_bw, uint32_t *on_queue); 721 void (*sctp_cwnd_update_after_output) (struct sctp_tcb *stcb, 722 struct sctp_nets *net, int burst_limit); 723 void (*sctp_cwnd_update_packet_transmitted) (struct sctp_tcb *stcb, 724 struct sctp_nets *net); 725 void (*sctp_cwnd_update_tsn_acknowledged) (struct sctp_nets *net, 726 struct sctp_tmit_chunk *); 727 void (*sctp_cwnd_new_transmission_begins) (struct sctp_tcb *stcb, 728 struct sctp_nets *net); 729 void (*sctp_cwnd_prepare_net_for_sack) (struct sctp_tcb *stcb, 730 struct sctp_nets *net); 731 int (*sctp_cwnd_socket_option) (struct sctp_tcb *stcb, int set, struct sctp_cc_option *); 732 void (*sctp_rtt_calculated) (struct sctp_tcb *, struct sctp_nets *, struct timeval *); 733}; 734 735/* 736 * RS - Structure to hold function pointers to the functions responsible 737 * for stream scheduling. 738 */ 739struct sctp_ss_functions { 740 void (*sctp_ss_init) (struct sctp_tcb *stcb, struct sctp_association *asoc, 741 int holds_lock); 742 void (*sctp_ss_clear) (struct sctp_tcb *stcb, struct sctp_association *asoc, 743 int clear_values, int holds_lock); 744 void (*sctp_ss_init_stream) (struct sctp_tcb *stcb, struct sctp_stream_out *strq, struct sctp_stream_out *with_strq); 745 void (*sctp_ss_add_to_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 746 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 747 int (*sctp_ss_is_empty) (struct sctp_tcb *stcb, struct sctp_association *asoc); 748 void (*sctp_ss_remove_from_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 749 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 750struct sctp_stream_out *(*sctp_ss_select_stream) (struct sctp_tcb *stcb, 751 struct sctp_nets *net, struct sctp_association *asoc); 752 void (*sctp_ss_scheduled) (struct sctp_tcb *stcb, struct sctp_nets *net, 753 struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much); 754 void (*sctp_ss_packet_done) (struct sctp_tcb *stcb, struct sctp_nets *net, 755 struct sctp_association *asoc); 756 int (*sctp_ss_get_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 757 struct sctp_stream_out *strq, uint16_t *value); 758 int (*sctp_ss_set_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 759 struct sctp_stream_out *strq, uint16_t value); 760 int (*sctp_ss_is_user_msgs_incomplete) (struct sctp_tcb *stcb, struct sctp_association *asoc); 761}; 762 763/* used to save ASCONF chunks for retransmission */ 764TAILQ_HEAD(sctp_asconf_head, sctp_asconf); 765struct sctp_asconf { 766 TAILQ_ENTRY(sctp_asconf) next; 767 uint32_t serial_number; 768 uint16_t snd_count; 769 struct mbuf *data; 770 uint16_t len; 771}; 772 773/* used to save ASCONF-ACK chunks for retransmission */ 774TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack); 775struct sctp_asconf_ack { 776 TAILQ_ENTRY(sctp_asconf_ack) next; 777 uint32_t serial_number; 778 struct sctp_nets *last_sent_to; 779 struct mbuf *data; 780 uint16_t len; 781}; 782 783/* 784 * Here we have information about each individual association that we track. 785 * We probably in production would be more dynamic. But for ease of 786 * implementation we will have a fixed array that we hunt for in a linear 787 * fashion. 788 */ 789struct sctp_association { 790 /* association state */ 791 int state; 792 793 /* queue of pending addrs to add/delete */ 794 struct sctp_asconf_addrhead asconf_queue; 795 796 struct timeval time_entered; /* time we entered state */ 797 struct timeval time_last_rcvd; 798 struct timeval time_last_sent; 799 struct timeval time_last_sat_advance; 800 struct sctp_nonpad_sndrcvinfo def_send; 801 802 /* timers and such */ 803 struct sctp_timer dack_timer; /* Delayed ack timer */ 804 struct sctp_timer asconf_timer; /* asconf */ 805 struct sctp_timer strreset_timer; /* stream reset */ 806 struct sctp_timer shut_guard_timer; /* shutdown guard */ 807 struct sctp_timer autoclose_timer; /* automatic close timer */ 808 struct sctp_timer delete_prim_timer; /* deleting primary dst */ 809 810 /* list of restricted local addresses */ 811 struct sctpladdr sctp_restricted_addrs; 812 813 /* last local address pending deletion (waiting for an address add) */ 814 struct sctp_ifa *asconf_addr_del_pending; 815 /* Deleted primary destination (used to stop timer) */ 816 struct sctp_nets *deleted_primary; 817 818 struct sctpnetlisthead nets; /* remote address list */ 819 820 /* Free chunk list */ 821 struct sctpchunk_listhead free_chunks; 822 823 /* Control chunk queue */ 824 struct sctpchunk_listhead control_send_queue; 825 826 /* ASCONF chunk queue */ 827 struct sctpchunk_listhead asconf_send_queue; 828 829 /* 830 * Once a TSN hits the wire it is moved to the sent_queue. We 831 * maintain two counts here (don't know if any but retran_cnt is 832 * needed). The idea is that the sent_queue_retran_cnt reflects how 833 * many chunks have been marked for retranmission by either T3-rxt 834 * or FR. 835 */ 836 struct sctpchunk_listhead sent_queue; 837 struct sctpchunk_listhead send_queue; 838 839 /* Scheduling queues */ 840 struct scheduling_data ss_data; 841 842 /* If an iterator is looking at me, this is it */ 843 struct sctp_iterator *stcb_starting_point_for_iterator; 844 845 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 846 struct sctp_asconf_ackhead asconf_ack_sent; 847 848 /* 849 * pointer to last stream reset queued to control queue by us with 850 * requests. 851 */ 852 struct sctp_tmit_chunk *str_reset; 853 /* 854 * if Source Address Selection happening, this will rotate through 855 * the link list. 856 */ 857 struct sctp_laddr *last_used_address; 858 859 /* stream arrays */ 860 struct sctp_stream_in *strmin; 861 struct sctp_stream_out *strmout; 862 uint8_t *mapping_array; 863 /* primary destination to use */ 864 struct sctp_nets *primary_destination; 865 struct sctp_nets *alternate; /* If primary is down or PF */ 866 /* For CMT */ 867 struct sctp_nets *last_net_cmt_send_started; 868 /* last place I got a data chunk from */ 869 struct sctp_nets *last_data_chunk_from; 870 /* last place I got a control from */ 871 struct sctp_nets *last_control_chunk_from; 872 873 874 /* 875 * wait to the point the cum-ack passes req->send_reset_at_tsn for 876 * any req on the list. 877 */ 878 struct sctp_resethead resetHead; 879 880 /* queue of chunks waiting to be sent into the local stack */ 881 struct sctp_readhead pending_reply_queue; 882 883 /* JRS - the congestion control functions are in this struct */ 884 struct sctp_cc_functions cc_functions; 885 /* 886 * JRS - value to store the currently loaded congestion control 887 * module 888 */ 889 uint32_t congestion_control_module; 890 /* RS - the stream scheduling functions are in this struct */ 891 struct sctp_ss_functions ss_functions; 892 /* RS - value to store the currently loaded stream scheduling module */ 893 uint32_t stream_scheduling_module; 894 895 uint32_t vrf_id; 896 uint32_t cookie_preserve_req; 897 /* ASCONF next seq I am sending out, inits at init-tsn */ 898 uint32_t asconf_seq_out; 899 uint32_t asconf_seq_out_acked; 900 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 901 uint32_t asconf_seq_in; 902 903 /* next seq I am sending in str reset messages */ 904 uint32_t str_reset_seq_out; 905 /* next seq I am expecting in str reset messages */ 906 uint32_t str_reset_seq_in; 907 908 /* various verification tag information */ 909 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 910 * by remote end, and I have unlocked this 911 * will be regenerated to a new random value. */ 912 uint32_t peer_vtag; /* The peers last tag */ 913 914 uint32_t my_vtag_nonce; 915 uint32_t peer_vtag_nonce; 916 917 uint32_t assoc_id; 918 919 /* This is the SCTP fragmentation threshold */ 920 uint32_t smallest_mtu; 921 922 /* 923 * Special hook for Fast retransmit, allows us to track the highest 924 * TSN that is NEW in this SACK if gap ack blocks are present. 925 */ 926 uint32_t this_sack_highest_gap; 927 928 /* 929 * The highest consecutive TSN that has been acked by peer on my 930 * sends 931 */ 932 uint32_t last_acked_seq; 933 934 /* The next TSN that I will use in sending. */ 935 uint32_t sending_seq; 936 937 /* Original seq number I used ??questionable to keep?? */ 938 uint32_t init_seq_number; 939 940 941 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 942 /* (A1 in Section 4.2) */ 943 uint32_t advanced_peer_ack_point; 944 945 /* 946 * The highest consequetive TSN at the bottom of the mapping array 947 * (for his sends). 948 */ 949 uint32_t cumulative_tsn; 950 /* 951 * Used to track the mapping array and its offset bits. This MAY be 952 * lower then cumulative_tsn. 953 */ 954 uint32_t mapping_array_base_tsn; 955 /* 956 * used to track highest TSN we have received and is listed in the 957 * mapping array. 958 */ 959 uint32_t highest_tsn_inside_map; 960 961 /* EY - new NR variables used for nr_sack based on mapping_array */ 962 uint8_t *nr_mapping_array; 963 uint32_t highest_tsn_inside_nr_map; 964 965 uint32_t fast_recovery_tsn; 966 uint32_t sat_t3_recovery_tsn; 967 uint32_t tsn_last_delivered; 968 /* 969 * For the pd-api we should re-write this a bit more efficient. We 970 * could have multiple sctp_queued_to_read's that we are building at 971 * once. Now we only do this when we get ready to deliver to the 972 * socket buffer. Note that we depend on the fact that the struct is 973 * "stuck" on the read queue until we finish all the pd-api. 974 */ 975 struct sctp_queued_to_read *control_pdapi; 976 977 uint32_t tsn_of_pdapi_last_delivered; 978 uint32_t pdapi_ppid; 979 uint32_t context; 980 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 981 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 982 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 983#ifdef SCTP_ASOCLOG_OF_TSNS 984 /* 985 * special log - This adds considerable size to the asoc, but 986 * provides a log that you can use to detect problems via kgdb. 987 */ 988 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE]; 989 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE]; 990 uint32_t cumack_log[SCTP_TSN_LOG_SIZE]; 991 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE]; 992 uint16_t tsn_in_at; 993 uint16_t tsn_out_at; 994 uint16_t tsn_in_wrapped; 995 uint16_t tsn_out_wrapped; 996 uint16_t cumack_log_at; 997 uint16_t cumack_log_atsnt; 998#endif /* SCTP_ASOCLOG_OF_TSNS */ 999#ifdef SCTP_FS_SPEC_LOG 1000 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE]; 1001 uint16_t fs_index; 1002#endif 1003 1004 /* 1005 * window state information and smallest MTU that I use to bound 1006 * segmentation 1007 */ 1008 uint32_t peers_rwnd; 1009 uint32_t my_rwnd; 1010 uint32_t my_last_reported_rwnd; 1011 uint32_t sctp_frag_point; 1012 1013 uint32_t total_output_queue_size; 1014 1015 uint32_t sb_cc; /* shadow of sb_cc */ 1016 uint32_t sb_send_resv; /* amount reserved on a send */ 1017 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd 1018 * control */ 1019#ifdef INET6 1020 uint32_t default_flowlabel; 1021#endif 1022 uint32_t pr_sctp_cnt; 1023 int ctrl_queue_cnt; /* could be removed REM - NO IT CAN'T!! RRS */ 1024 /* 1025 * All outbound datagrams queue into this list from the individual 1026 * stream queue. Here they get assigned a TSN and then await 1027 * sending. The stream seq comes when it is first put in the 1028 * individual str queue 1029 */ 1030 unsigned int stream_queue_cnt; 1031 unsigned int send_queue_cnt; 1032 unsigned int sent_queue_cnt; 1033 unsigned int sent_queue_cnt_removeable; 1034 /* 1035 * Number on sent queue that are marked for retran until this value 1036 * is 0 we only send one packet of retran'ed data. 1037 */ 1038 unsigned int sent_queue_retran_cnt; 1039 1040 unsigned int size_on_reasm_queue; 1041 unsigned int cnt_on_reasm_queue; 1042 unsigned int fwd_tsn_cnt; 1043 /* amount of data (bytes) currently in flight (on all destinations) */ 1044 unsigned int total_flight; 1045 /* Total book size in flight */ 1046 unsigned int total_flight_count; /* count of chunks used with 1047 * book total */ 1048 /* count of destinaton nets and list of destination nets */ 1049 unsigned int numnets; 1050 1051 /* Total error count on this association */ 1052 unsigned int overall_error_count; 1053 1054 unsigned int cnt_msg_on_sb; 1055 1056 /* All stream count of chunks for delivery */ 1057 unsigned int size_on_all_streams; 1058 unsigned int cnt_on_all_streams; 1059 1060 /* Heart Beat delay in ms */ 1061 uint32_t heart_beat_delay; 1062 1063 /* autoclose */ 1064 unsigned int sctp_autoclose_ticks; 1065 1066 /* how many preopen streams we have */ 1067 unsigned int pre_open_streams; 1068 1069 /* How many streams I support coming into me */ 1070 unsigned int max_inbound_streams; 1071 1072 /* the cookie life I award for any cookie, in seconds */ 1073 unsigned int cookie_life; 1074 /* time to delay acks for */ 1075 unsigned int delayed_ack; 1076 unsigned int old_delayed_ack; 1077 unsigned int sack_freq; 1078 unsigned int data_pkts_seen; 1079 1080 unsigned int numduptsns; 1081 int dup_tsns[SCTP_MAX_DUP_TSNS]; 1082 unsigned int initial_init_rto_max; /* initial RTO for INIT's */ 1083 unsigned int initial_rto; /* initial send RTO */ 1084 unsigned int minrto; /* per assoc RTO-MIN */ 1085 unsigned int maxrto; /* per assoc RTO-MAX */ 1086 1087 /* authentication fields */ 1088 sctp_auth_chklist_t *local_auth_chunks; 1089 sctp_auth_chklist_t *peer_auth_chunks; 1090 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 1091 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 1092 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 1093 sctp_authinfo_t authinfo; /* randoms, cached keys */ 1094 /* 1095 * refcnt to block freeing when a sender or receiver is off coping 1096 * user data in. 1097 */ 1098 uint32_t refcnt; 1099 uint32_t chunks_on_out_queue; /* total chunks floating around, 1100 * locked by send socket buffer */ 1101 uint32_t peers_adaptation; 1102 uint32_t default_mtu; 1103 uint16_t peer_hmac_id; /* peer HMAC id to send */ 1104 1105 /* 1106 * Being that we have no bag to collect stale cookies, and that we 1107 * really would not want to anyway.. we will count them in this 1108 * counter. We of course feed them to the pigeons right away (I have 1109 * always thought of pigeons as flying rats). 1110 */ 1111 uint16_t stale_cookie_count; 1112 1113 /* 1114 * For the partial delivery API, if up, invoked this is what last 1115 * TSN I delivered 1116 */ 1117 uint16_t str_of_pdapi; 1118 uint16_t ssn_of_pdapi; 1119 1120 /* counts of actual built streams. Allocation may be more however */ 1121 /* could re-arrange to optimize space here. */ 1122 uint16_t streamincnt; 1123 uint16_t streamoutcnt; 1124 uint16_t strm_realoutsize; 1125 uint16_t strm_pending_add_size; 1126 /* my maximum number of retrans of INIT and SEND */ 1127 /* copied from SCTP but should be individually setable */ 1128 uint16_t max_init_times; 1129 uint16_t max_send_times; 1130 1131 uint16_t def_net_failure; 1132 1133 uint16_t def_net_pf_threshold; 1134 1135 /* 1136 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 1137 * awaiting ACK 1138 */ 1139 uint16_t mapping_array_size; 1140 1141 uint16_t last_strm_seq_delivered; 1142 uint16_t last_strm_no_delivered; 1143 1144 uint16_t last_revoke_count; 1145 int16_t num_send_timers_up; 1146 1147 uint16_t stream_locked_on; 1148 uint16_t ecn_echo_cnt_onq; 1149 1150 uint16_t free_chunk_cnt; 1151 uint8_t stream_locked; 1152 uint8_t authenticated; /* packet authenticated ok */ 1153 /* 1154 * This flag indicates that a SACK need to be sent. Initially this 1155 * is 1 to send the first sACK immediately. 1156 */ 1157 uint8_t send_sack; 1158 1159 /* max burst of new packets into the network */ 1160 uint32_t max_burst; 1161 /* max burst of fast retransmit packets */ 1162 uint32_t fr_max_burst; 1163 1164 uint8_t sat_network; /* RTT is in range of sat net or greater */ 1165 uint8_t sat_network_lockout; /* lockout code */ 1166 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 1167 /* flag goes on when we are doing a partial delivery api */ 1168 uint8_t hb_random_values[4]; 1169 uint8_t fragmented_delivery_inprogress; 1170 uint8_t fragment_flags; 1171 uint8_t last_flags_delivered; 1172 uint8_t hb_ect_randombit; 1173 uint8_t hb_random_idx; 1174 uint8_t default_dscp; 1175 uint8_t asconf_del_pending; /* asconf delete last addr pending */ 1176 uint8_t trigger_reset; 1177 /* 1178 * This value, plus all other ack'd but above cum-ack is added 1179 * together to cross check against the bit that we have yet to 1180 * define (probably in the SACK). When the cum-ack is updated, this 1181 * sum is updated as well. 1182 */ 1183 1184 /* Flags whether an extension is supported or not */ 1185 uint8_t ecn_supported; 1186 uint8_t prsctp_supported; 1187 uint8_t auth_supported; 1188 uint8_t asconf_supported; 1189 uint8_t reconfig_supported; 1190 uint8_t nrsack_supported; 1191 uint8_t pktdrop_supported; 1192 uint8_t idata_supported; 1193 1194 /* Did the peer make the stream config (add out) request */ 1195 uint8_t peer_req_out; 1196 1197 uint8_t local_strreset_support; 1198 uint8_t peer_supports_nat; 1199 1200 struct sctp_scoping scope; 1201 /* flags to handle send alternate net tracking */ 1202 uint8_t used_alt_asconfack; 1203 uint8_t fast_retran_loss_recovery; 1204 uint8_t sat_t3_loss_recovery; 1205 uint8_t dropped_special_cnt; 1206 uint8_t seen_a_sack_this_pkt; 1207 uint8_t stream_reset_outstanding; 1208 uint8_t stream_reset_out_is_outstanding; 1209 uint8_t delayed_connection; 1210 uint8_t ifp_had_enobuf; 1211 uint8_t saw_sack_with_frags; 1212 uint8_t saw_sack_with_nr_frags; 1213 uint8_t in_asocid_hash; 1214 uint8_t assoc_up_sent; 1215 uint8_t adaptation_needed; 1216 uint8_t adaptation_sent; 1217 /* CMT variables */ 1218 uint8_t cmt_dac_pkts_rcvd; 1219 uint8_t sctp_cmt_on_off; 1220 uint8_t iam_blocking; 1221 uint8_t cookie_how[8]; 1222 /* JRS 5/21/07 - CMT PF variable */ 1223 uint8_t sctp_cmt_pf; 1224 uint8_t use_precise_time; 1225 uint64_t sctp_features; 1226 uint32_t max_cwnd; 1227 uint16_t port; /* remote UDP encapsulation port */ 1228 /* 1229 * The mapping array is used to track out of order sequences above 1230 * last_acked_seq. 0 indicates packet missing 1 indicates packet 1231 * rec'd. We slide it up every time we raise last_acked_seq and 0 1232 * trailing locactions out. If I get a TSN above the array 1233 * mappingArraySz, I discard the datagram and let retransmit happen. 1234 */ 1235 uint32_t marked_retrans; 1236 uint32_t timoinit; 1237 uint32_t timodata; 1238 uint32_t timosack; 1239 uint32_t timoshutdown; 1240 uint32_t timoheartbeat; 1241 uint32_t timocookie; 1242 uint32_t timoshutdownack; 1243 struct timeval start_time; 1244 struct timeval discontinuity_time; 1245 uint64_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 1246 uint64_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 1247}; 1248 1249#endif 1250