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("$FreeBSD$"); 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 int 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}; 186 187#define SCTP_ITERATOR_STOP_CUR_IT 0x00000004 188#define SCTP_ITERATOR_STOP_CUR_INP 0x00000008 189 190struct sctp_net_route { 191 sctp_rtentry_t *ro_rt; 192 void *ro_lle; 193 void *ro_ia; 194 int ro_flags; 195 union sctp_sockstore _l_addr; /* remote peer addr */ 196 struct sctp_ifa *_s_addr; /* our selected src addr */ 197}; 198 199struct 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 222struct 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 246struct 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 struct sctp_timer hb_timer; 255 256 /* 257 * The following two in combination equate to a route entry for v6 258 * or v4. 259 */ 260 struct sctp_net_route ro; 261 262 /* mtu discovered so far */ 263 uint32_t mtu; 264 uint32_t ssthresh; /* not sure about this one for split */ 265 uint32_t last_cwr_tsn; 266 uint32_t cwr_window_tsn; 267 uint32_t ecn_ce_pkt_cnt; 268 uint32_t lost_cnt; 269 /* smoothed average things for RTT and RTO itself */ 270 int lastsa; 271 int lastsv; 272 uint64_t rtt; /* last measured rtt value in us */ 273 unsigned int RTO; 274 275 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */ 276 struct sctp_timer rxt_timer; 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#ifdef INET6 325 uint32_t flowlabel; 326#endif 327 uint8_t dscp; 328 329 struct timeval start_time; /* time when this net was created */ 330 uint32_t marked_retrans;/* number or DATA chunks marked for timer 331 * based retransmissions */ 332 uint32_t marked_fastretrans; 333 uint32_t heart_beat_delay; /* Heart Beat delay in ms */ 334 335 /* if this guy is ok or not ... status */ 336 uint16_t dest_state; 337 /* number of timeouts to consider the destination unreachable */ 338 uint16_t failure_threshold; 339 /* number of timeouts to consider the destination potentially failed */ 340 uint16_t pf_threshold; 341 /* error stats on the destination */ 342 uint16_t error_count; 343 /* UDP port number in case of UDP tunneling */ 344 uint16_t port; 345 346 uint8_t fast_retran_loss_recovery; 347 uint8_t will_exit_fast_recovery; 348 /* Flags that probably can be combined into dest_state */ 349 uint8_t fast_retran_ip; /* fast retransmit in progress */ 350 uint8_t hb_responded; 351 uint8_t saw_newack; /* CMT's SFR algorithm flag */ 352 uint8_t src_addr_selected; /* if we split we move */ 353 uint8_t indx_of_eligible_next_to_use; 354 uint8_t addr_is_local; /* its a local address (if known) could move 355 * in split */ 356 357 /* 358 * CMT variables (iyengar@cis.udel.edu) 359 */ 360 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to 361 * find a new pseudocumack. This flag 362 * is set after a new pseudo-cumack 363 * has been received and indicates 364 * that the sender should find the 365 * next pseudo-cumack expected for 366 * this destination */ 367 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to 368 * find a new rtx-pseudocumack. This 369 * flag is set after a new 370 * rtx-pseudo-cumack has been received 371 * and indicates that the sender 372 * should find the next 373 * rtx-pseudo-cumack expected for this 374 * destination */ 375 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to 376 * indicate if a new pseudo-cumack or 377 * rtx-pseudo-cumack has been received */ 378 uint8_t window_probe; /* Doing a window probe? */ 379 uint8_t RTO_measured; /* Have we done the first measure */ 380 uint8_t last_hs_used; /* index into the last HS table entry we used */ 381 uint8_t lan_type; 382 uint8_t rto_needed; 383 uint32_t flowid; 384 uint8_t flowtype; 385}; 386 387 388struct sctp_data_chunkrec { 389 uint32_t TSN_seq; /* the TSN of this transmit */ 390 uint16_t stream_seq; /* the stream sequence number of this transmit */ 391 uint16_t stream_number; /* the stream number of this guy */ 392 uint32_t payloadtype; 393 uint32_t context; /* from send */ 394 uint32_t cwnd_at_send; 395 /* 396 * part of the Highest sacked algorithm to be able to stroke counts 397 * on ones that are FR'd. 398 */ 399 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 400 struct timeval timetodrop; /* time we drop it from queue */ 401 uint8_t doing_fast_retransmit; 402 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 403 * outbound holds sending flags for PR-SCTP. */ 404 uint8_t state_flags; 405 uint8_t chunk_was_revoked; 406 uint8_t fwd_tsn_cnt; 407}; 408 409TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 410 411/* The lower byte is used to enumerate PR_SCTP policies */ 412#define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 413#define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 414#define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 415 416/* The upper byte is used as a bit mask */ 417#define CHUNK_FLAGS_FRAGMENT_OK 0x0100 418 419struct chk_id { 420 uint8_t id; 421 uint8_t can_take_data; 422}; 423 424 425struct sctp_tmit_chunk { 426 union { 427 struct sctp_data_chunkrec data; 428 struct chk_id chunk_id; 429 } rec; 430 struct sctp_association *asoc; /* bp to asoc this belongs to */ 431 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 432 struct mbuf *data; /* pointer to mbuf chain of data */ 433 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 434 struct sctp_nets *whoTo; 435 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 436 int32_t sent; /* the send status */ 437 uint16_t snd_count; /* number of times I sent */ 438 uint16_t flags; /* flags, such as FRAGMENT_OK */ 439 uint16_t send_size; 440 uint16_t book_size; 441 uint16_t mbcnt; 442 uint16_t auth_keyid; 443 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */ 444 uint8_t pad_inplace; 445 uint8_t do_rtt; 446 uint8_t book_size_scale; 447 uint8_t no_fr_allowed; 448 uint8_t copy_by_ref; 449 uint8_t window_probe; 450}; 451 452/* 453 * The first part of this structure MUST be the entire sinfo structure. Maybe 454 * I should have made it a sub structure... we can circle back later and do 455 * that if we want. 456 */ 457struct sctp_queued_to_read { /* sinfo structure Pluse more */ 458 uint16_t sinfo_stream; /* off the wire */ 459 uint16_t sinfo_ssn; /* off the wire */ 460 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for 461 * EOR */ 462 uint32_t sinfo_ppid; /* off the wire */ 463 uint32_t sinfo_context; /* pick this up from assoc def context? */ 464 uint32_t sinfo_timetolive; /* not used by kernel */ 465 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */ 466 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */ 467 sctp_assoc_t sinfo_assoc_id; /* our assoc id */ 468 /* Non sinfo stuff */ 469 uint32_t length; /* length of data */ 470 uint32_t held_length; /* length held in sb */ 471 struct sctp_nets *whoFrom; /* where it came from */ 472 struct mbuf *data; /* front of the mbuf chain of data with 473 * PKT_HDR */ 474 struct mbuf *tail_mbuf; /* used for multi-part data */ 475 struct mbuf *aux_data; /* used to hold/cache control if o/s does not 476 * take it from us */ 477 struct sctp_tcb *stcb; /* assoc, used for window update */ 478 TAILQ_ENTRY(sctp_queued_to_read) next; 479 uint16_t port_from; 480 uint16_t spec_flags; /* Flags to hold the notification field */ 481 uint8_t do_not_ref_stcb; 482 uint8_t end_added; 483 uint8_t pdapi_aborted; 484 uint8_t some_taken; 485}; 486 487/* This data structure will be on the outbound 488 * stream queues. Data will be pulled off from 489 * the front of the mbuf data and chunk-ified 490 * by the output routines. We will custom 491 * fit every chunk we pull to the send/sent 492 * queue to make up the next full packet 493 * if we can. An entry cannot be removed 494 * from the stream_out queue until 495 * the msg_is_complete flag is set. This 496 * means at times data/tail_mbuf MIGHT 497 * be NULL.. If that occurs it happens 498 * for one of two reasons. Either the user 499 * is blocked on a send() call and has not 500 * awoken to copy more data down... OR 501 * the user is in the explict MSG_EOR mode 502 * and wrote some data, but has not completed 503 * sending. 504 */ 505struct sctp_stream_queue_pending { 506 struct mbuf *data; 507 struct mbuf *tail_mbuf; 508 struct timeval ts; 509 struct sctp_nets *net; 510 TAILQ_ENTRY(sctp_stream_queue_pending) next; 511 TAILQ_ENTRY(sctp_stream_queue_pending) ss_next; 512 uint32_t length; 513 uint32_t timetolive; 514 uint32_t ppid; 515 uint32_t context; 516 uint16_t sinfo_flags; 517 uint16_t stream; 518 uint16_t act_flags; 519 uint16_t auth_keyid; 520 uint8_t holds_key_ref; 521 uint8_t msg_is_complete; 522 uint8_t some_taken; 523 uint8_t sender_all_done; 524 uint8_t put_last_out; 525 uint8_t discard_rest; 526}; 527 528/* 529 * this struct contains info that is used to track inbound stream data and 530 * help with ordering. 531 */ 532TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 533struct sctp_stream_in { 534 struct sctp_readhead inqueue; 535 uint16_t stream_no; 536 uint16_t last_sequence_delivered; /* used for re-order */ 537 uint8_t delivery_started; 538}; 539 540TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 541TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending); 542 543/* Round-robin schedulers */ 544struct ss_rr { 545 /* next link in wheel */ 546 TAILQ_ENTRY(sctp_stream_out) next_spoke; 547}; 548 549/* Priority scheduler */ 550struct ss_prio { 551 /* next link in wheel */ 552 TAILQ_ENTRY(sctp_stream_out) next_spoke; 553 /* priority id */ 554 uint16_t priority; 555}; 556 557/* Fair Bandwidth scheduler */ 558struct ss_fb { 559 /* next link in wheel */ 560 TAILQ_ENTRY(sctp_stream_out) next_spoke; 561 /* stores message size */ 562 int32_t rounds; 563}; 564 565/* 566 * This union holds all data necessary for 567 * different stream schedulers. 568 */ 569union scheduling_data { 570 struct sctpwheel_listhead out_wheel; 571 struct sctplist_listhead out_list; 572}; 573 574/* 575 * This union holds all parameters per stream 576 * necessary for different stream schedulers. 577 */ 578union scheduling_parameters { 579 struct ss_rr rr; 580 struct ss_prio prio; 581 struct ss_fb fb; 582}; 583 584/* States for outgoing streams */ 585#define SCTP_STREAM_CLOSED 0x00 586#define SCTP_STREAM_OPENING 0x01 587#define SCTP_STREAM_OPEN 0x02 588#define SCTP_STREAM_RESET_PENDING 0x03 589#define SCTP_STREAM_RESET_IN_FLIGHT 0x04 590 591#define SCTP_MAX_STREAMS_AT_ONCE_RESET 200 592 593/* This struct is used to track the traffic on outbound streams */ 594struct sctp_stream_out { 595 struct sctp_streamhead outqueue; 596 union scheduling_parameters ss_params; 597 uint32_t chunks_on_queues; /* send queue and sent queue */ 598#if defined(SCTP_DETAILED_STR_STATS) 599 uint32_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 600 uint32_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 601#else 602 /* Only the aggregation */ 603 uint32_t abandoned_unsent[1]; 604 uint32_t abandoned_sent[1]; 605#endif 606 uint16_t stream_no; 607 uint16_t next_sequence_send; /* next one I expect to send out */ 608 uint8_t last_msg_incomplete; 609 uint8_t state; 610}; 611 612/* used to keep track of the addresses yet to try to add/delete */ 613TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 614struct sctp_asconf_addr { 615 TAILQ_ENTRY(sctp_asconf_addr) next; 616 struct sctp_asconf_addr_param ap; 617 struct sctp_ifa *ifa; /* save the ifa for add/del ip */ 618 uint8_t sent; /* has this been sent yet? */ 619 uint8_t special_del; /* not to be used in lookup */ 620}; 621 622struct sctp_scoping { 623 uint8_t ipv4_addr_legal; 624 uint8_t ipv6_addr_legal; 625 uint8_t loopback_scope; 626 uint8_t ipv4_local_scope; 627 uint8_t local_scope; 628 uint8_t site_scope; 629}; 630 631#define SCTP_TSN_LOG_SIZE 40 632 633struct sctp_tsn_log { 634 void *stcb; 635 uint32_t tsn; 636 uint16_t strm; 637 uint16_t seq; 638 uint16_t sz; 639 uint16_t flgs; 640 uint16_t in_pos; 641 uint16_t in_out; 642}; 643 644#define SCTP_FS_SPEC_LOG_SIZE 200 645struct sctp_fs_spec_log { 646 uint32_t sent; 647 uint32_t total_flight; 648 uint32_t tsn; 649 uint16_t book; 650 uint8_t incr; 651 uint8_t decr; 652}; 653 654/* This struct is here to cut out the compatiabilty 655 * pad that bulks up both the inp and stcb. The non 656 * pad portion MUST stay in complete sync with 657 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added 658 * this must be done here too. 659 */ 660struct sctp_nonpad_sndrcvinfo { 661 uint16_t sinfo_stream; 662 uint16_t sinfo_ssn; 663 uint16_t sinfo_flags; 664 uint32_t sinfo_ppid; 665 uint32_t sinfo_context; 666 uint32_t sinfo_timetolive; 667 uint32_t sinfo_tsn; 668 uint32_t sinfo_cumtsn; 669 sctp_assoc_t sinfo_assoc_id; 670 uint16_t sinfo_keynumber; 671 uint16_t sinfo_keynumber_valid; 672}; 673 674/* 675 * JRS - Structure to hold function pointers to the functions responsible 676 * for congestion control. 677 */ 678 679struct sctp_cc_functions { 680 void (*sctp_set_initial_cc_param) (struct sctp_tcb *stcb, struct sctp_nets *net); 681 void (*sctp_cwnd_update_after_sack) (struct sctp_tcb *stcb, 682 struct sctp_association *asoc, 683 int accum_moved, int reneged_all, int will_exit); 684 void (*sctp_cwnd_update_exit_pf) (struct sctp_tcb *stcb, struct sctp_nets *net); 685 void (*sctp_cwnd_update_after_fr) (struct sctp_tcb *stcb, 686 struct sctp_association *asoc); 687 void (*sctp_cwnd_update_after_timeout) (struct sctp_tcb *stcb, 688 struct sctp_nets *net); 689 void (*sctp_cwnd_update_after_ecn_echo) (struct sctp_tcb *stcb, 690 struct sctp_nets *net, int in_window, int num_pkt_lost); 691 void (*sctp_cwnd_update_after_packet_dropped) (struct sctp_tcb *stcb, 692 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp, 693 uint32_t * bottle_bw, uint32_t * on_queue); 694 void (*sctp_cwnd_update_after_output) (struct sctp_tcb *stcb, 695 struct sctp_nets *net, int burst_limit); 696 void (*sctp_cwnd_update_packet_transmitted) (struct sctp_tcb *stcb, 697 struct sctp_nets *net); 698 void (*sctp_cwnd_update_tsn_acknowledged) (struct sctp_nets *net, 699 struct sctp_tmit_chunk *); 700 void (*sctp_cwnd_new_transmission_begins) (struct sctp_tcb *stcb, 701 struct sctp_nets *net); 702 void (*sctp_cwnd_prepare_net_for_sack) (struct sctp_tcb *stcb, 703 struct sctp_nets *net); 704 int (*sctp_cwnd_socket_option) (struct sctp_tcb *stcb, int set, struct sctp_cc_option *); 705 void (*sctp_rtt_calculated) (struct sctp_tcb *, struct sctp_nets *, struct timeval *); 706}; 707 708/* 709 * RS - Structure to hold function pointers to the functions responsible 710 * for stream scheduling. 711 */ 712struct sctp_ss_functions { 713 void (*sctp_ss_init) (struct sctp_tcb *stcb, struct sctp_association *asoc, 714 int holds_lock); 715 void (*sctp_ss_clear) (struct sctp_tcb *stcb, struct sctp_association *asoc, 716 int clear_values, int holds_lock); 717 void (*sctp_ss_init_stream) (struct sctp_stream_out *strq, struct sctp_stream_out *with_strq); 718 void (*sctp_ss_add_to_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 719 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 720 int (*sctp_ss_is_empty) (struct sctp_tcb *stcb, struct sctp_association *asoc); 721 void (*sctp_ss_remove_from_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 722 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 723 struct sctp_stream_out *(*sctp_ss_select_stream) (struct sctp_tcb *stcb, 724 struct sctp_nets *net, struct sctp_association *asoc); 725 void (*sctp_ss_scheduled) (struct sctp_tcb *stcb, struct sctp_nets *net, 726 struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much); 727 void (*sctp_ss_packet_done) (struct sctp_tcb *stcb, struct sctp_nets *net, 728 struct sctp_association *asoc); 729 int (*sctp_ss_get_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 730 struct sctp_stream_out *strq, uint16_t * value); 731 int (*sctp_ss_set_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 732 struct sctp_stream_out *strq, uint16_t value); 733}; 734 735/* used to save ASCONF chunks for retransmission */ 736TAILQ_HEAD(sctp_asconf_head, sctp_asconf); 737struct sctp_asconf { 738 TAILQ_ENTRY(sctp_asconf) next; 739 uint32_t serial_number; 740 uint16_t snd_count; 741 struct mbuf *data; 742 uint16_t len; 743}; 744 745/* used to save ASCONF-ACK chunks for retransmission */ 746TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack); 747struct sctp_asconf_ack { 748 TAILQ_ENTRY(sctp_asconf_ack) next; 749 uint32_t serial_number; 750 struct sctp_nets *last_sent_to; 751 struct mbuf *data; 752 uint16_t len; 753}; 754 755/* 756 * Here we have information about each individual association that we track. 757 * We probably in production would be more dynamic. But for ease of 758 * implementation we will have a fixed array that we hunt for in a linear 759 * fashion. 760 */ 761struct sctp_association { 762 /* association state */ 763 int state; 764 765 /* queue of pending addrs to add/delete */ 766 struct sctp_asconf_addrhead asconf_queue; 767 768 struct timeval time_entered; /* time we entered state */ 769 struct timeval time_last_rcvd; 770 struct timeval time_last_sent; 771 struct timeval time_last_sat_advance; 772 struct sctp_nonpad_sndrcvinfo def_send; 773 774 /* timers and such */ 775 struct sctp_timer dack_timer; /* Delayed ack timer */ 776 struct sctp_timer asconf_timer; /* asconf */ 777 struct sctp_timer strreset_timer; /* stream reset */ 778 struct sctp_timer shut_guard_timer; /* shutdown guard */ 779 struct sctp_timer autoclose_timer; /* automatic close timer */ 780 struct sctp_timer delayed_event_timer; /* timer for delayed events */ 781 struct sctp_timer delete_prim_timer; /* deleting primary dst */ 782 783 /* list of restricted local addresses */ 784 struct sctpladdr sctp_restricted_addrs; 785 786 /* last local address pending deletion (waiting for an address add) */ 787 struct sctp_ifa *asconf_addr_del_pending; 788 /* Deleted primary destination (used to stop timer) */ 789 struct sctp_nets *deleted_primary; 790 791 struct sctpnetlisthead nets; /* remote address list */ 792 793 /* Free chunk list */ 794 struct sctpchunk_listhead free_chunks; 795 796 /* Control chunk queue */ 797 struct sctpchunk_listhead control_send_queue; 798 799 /* ASCONF chunk queue */ 800 struct sctpchunk_listhead asconf_send_queue; 801 802 /* 803 * Once a TSN hits the wire it is moved to the sent_queue. We 804 * maintain two counts here (don't know if any but retran_cnt is 805 * needed). The idea is that the sent_queue_retran_cnt reflects how 806 * many chunks have been marked for retranmission by either T3-rxt 807 * or FR. 808 */ 809 struct sctpchunk_listhead sent_queue; 810 struct sctpchunk_listhead send_queue; 811 812 /* re-assembly queue for fragmented chunks on the inbound path */ 813 struct sctpchunk_listhead reasmqueue; 814 815 /* Scheduling queues */ 816 union scheduling_data ss_data; 817 818 /* 819 * This pointer will be set to NULL most of the time. But when we 820 * have a fragmented message, where we could not get out all of the 821 * message at the last send then this will point to the stream to go 822 * get data from. 823 */ 824 struct sctp_stream_out *locked_on_sending; 825 826 /* If an iterator is looking at me, this is it */ 827 struct sctp_iterator *stcb_starting_point_for_iterator; 828 829 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 830 struct sctp_asconf_ackhead asconf_ack_sent; 831 832 /* 833 * pointer to last stream reset queued to control queue by us with 834 * requests. 835 */ 836 struct sctp_tmit_chunk *str_reset; 837 /* 838 * if Source Address Selection happening, this will rotate through 839 * the link list. 840 */ 841 struct sctp_laddr *last_used_address; 842 843 /* stream arrays */ 844 struct sctp_stream_in *strmin; 845 struct sctp_stream_out *strmout; 846 uint8_t *mapping_array; 847 /* primary destination to use */ 848 struct sctp_nets *primary_destination; 849 struct sctp_nets *alternate; /* If primary is down or PF */ 850 /* For CMT */ 851 struct sctp_nets *last_net_cmt_send_started; 852 /* last place I got a data chunk from */ 853 struct sctp_nets *last_data_chunk_from; 854 /* last place I got a control from */ 855 struct sctp_nets *last_control_chunk_from; 856 857 /* circular looking for output selection */ 858 struct sctp_stream_out *last_out_stream; 859 860 /* 861 * wait to the point the cum-ack passes req->send_reset_at_tsn for 862 * any req on the list. 863 */ 864 struct sctp_resethead resetHead; 865 866 /* queue of chunks waiting to be sent into the local stack */ 867 struct sctp_readhead pending_reply_queue; 868 869 /* JRS - the congestion control functions are in this struct */ 870 struct sctp_cc_functions cc_functions; 871 /* 872 * JRS - value to store the currently loaded congestion control 873 * module 874 */ 875 uint32_t congestion_control_module; 876 /* RS - the stream scheduling functions are in this struct */ 877 struct sctp_ss_functions ss_functions; 878 /* RS - value to store the currently loaded stream scheduling module */ 879 uint32_t stream_scheduling_module; 880 881 uint32_t vrf_id; 882 883 uint32_t cookie_preserve_req; 884 /* ASCONF next seq I am sending out, inits at init-tsn */ 885 uint32_t asconf_seq_out; 886 uint32_t asconf_seq_out_acked; 887 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 888 uint32_t asconf_seq_in; 889 890 /* next seq I am sending in str reset messages */ 891 uint32_t str_reset_seq_out; 892 /* next seq I am expecting in str reset messages */ 893 uint32_t str_reset_seq_in; 894 895 /* various verification tag information */ 896 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 897 * by remote end, and I have unlocked this 898 * will be regenerated to a new random value. */ 899 uint32_t peer_vtag; /* The peers last tag */ 900 901 uint32_t my_vtag_nonce; 902 uint32_t peer_vtag_nonce; 903 904 uint32_t assoc_id; 905 906 /* This is the SCTP fragmentation threshold */ 907 uint32_t smallest_mtu; 908 909 /* 910 * Special hook for Fast retransmit, allows us to track the highest 911 * TSN that is NEW in this SACK if gap ack blocks are present. 912 */ 913 uint32_t this_sack_highest_gap; 914 915 /* 916 * The highest consecutive TSN that has been acked by peer on my 917 * sends 918 */ 919 uint32_t last_acked_seq; 920 921 /* The next TSN that I will use in sending. */ 922 uint32_t sending_seq; 923 924 /* Original seq number I used ??questionable to keep?? */ 925 uint32_t init_seq_number; 926 927 928 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 929 /* (A1 in Section 4.2) */ 930 uint32_t advanced_peer_ack_point; 931 932 /* 933 * The highest consequetive TSN at the bottom of the mapping array 934 * (for his sends). 935 */ 936 uint32_t cumulative_tsn; 937 /* 938 * Used to track the mapping array and its offset bits. This MAY be 939 * lower then cumulative_tsn. 940 */ 941 uint32_t mapping_array_base_tsn; 942 /* 943 * used to track highest TSN we have received and is listed in the 944 * mapping array. 945 */ 946 uint32_t highest_tsn_inside_map; 947 948 /* EY - new NR variables used for nr_sack based on mapping_array */ 949 uint8_t *nr_mapping_array; 950 uint32_t highest_tsn_inside_nr_map; 951 952 uint32_t fast_recovery_tsn; 953 uint32_t sat_t3_recovery_tsn; 954 uint32_t tsn_last_delivered; 955 /* 956 * For the pd-api we should re-write this a bit more efficent. We 957 * could have multiple sctp_queued_to_read's that we are building at 958 * once. Now we only do this when we get ready to deliver to the 959 * socket buffer. Note that we depend on the fact that the struct is 960 * "stuck" on the read queue until we finish all the pd-api. 961 */ 962 struct sctp_queued_to_read *control_pdapi; 963 964 uint32_t tsn_of_pdapi_last_delivered; 965 uint32_t pdapi_ppid; 966 uint32_t context; 967 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 968 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 969 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 970#ifdef SCTP_ASOCLOG_OF_TSNS 971 /* 972 * special log - This adds considerable size to the asoc, but 973 * provides a log that you can use to detect problems via kgdb. 974 */ 975 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE]; 976 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE]; 977 uint32_t cumack_log[SCTP_TSN_LOG_SIZE]; 978 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE]; 979 uint16_t tsn_in_at; 980 uint16_t tsn_out_at; 981 uint16_t tsn_in_wrapped; 982 uint16_t tsn_out_wrapped; 983 uint16_t cumack_log_at; 984 uint16_t cumack_log_atsnt; 985#endif /* SCTP_ASOCLOG_OF_TSNS */ 986#ifdef SCTP_FS_SPEC_LOG 987 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE]; 988 uint16_t fs_index; 989#endif 990 991 /* 992 * window state information and smallest MTU that I use to bound 993 * segmentation 994 */ 995 uint32_t peers_rwnd; 996 uint32_t my_rwnd; 997 uint32_t my_last_reported_rwnd; 998 uint32_t sctp_frag_point; 999 1000 uint32_t total_output_queue_size; 1001 1002 uint32_t sb_cc; /* shadow of sb_cc */ 1003 uint32_t sb_send_resv; /* amount reserved on a send */ 1004 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd 1005 * control */ 1006#ifdef INET6 1007 uint32_t default_flowlabel; 1008#endif 1009 uint32_t pr_sctp_cnt; 1010 int ctrl_queue_cnt; /* could be removed REM - NO IT CAN'T!! RRS */ 1011 /* 1012 * All outbound datagrams queue into this list from the individual 1013 * stream queue. Here they get assigned a TSN and then await 1014 * sending. The stream seq comes when it is first put in the 1015 * individual str queue 1016 */ 1017 unsigned int stream_queue_cnt; 1018 unsigned int send_queue_cnt; 1019 unsigned int sent_queue_cnt; 1020 unsigned int sent_queue_cnt_removeable; 1021 /* 1022 * Number on sent queue that are marked for retran until this value 1023 * is 0 we only send one packet of retran'ed data. 1024 */ 1025 unsigned int sent_queue_retran_cnt; 1026 1027 unsigned int size_on_reasm_queue; 1028 unsigned int cnt_on_reasm_queue; 1029 unsigned int fwd_tsn_cnt; 1030 /* amount of data (bytes) currently in flight (on all destinations) */ 1031 unsigned int total_flight; 1032 /* Total book size in flight */ 1033 unsigned int total_flight_count; /* count of chunks used with 1034 * book total */ 1035 /* count of destinaton nets and list of destination nets */ 1036 unsigned int numnets; 1037 1038 /* Total error count on this association */ 1039 unsigned int overall_error_count; 1040 1041 unsigned int cnt_msg_on_sb; 1042 1043 /* All stream count of chunks for delivery */ 1044 unsigned int size_on_all_streams; 1045 unsigned int cnt_on_all_streams; 1046 1047 /* Heart Beat delay in ms */ 1048 uint32_t heart_beat_delay; 1049 1050 /* autoclose */ 1051 unsigned int sctp_autoclose_ticks; 1052 1053 /* how many preopen streams we have */ 1054 unsigned int pre_open_streams; 1055 1056 /* How many streams I support coming into me */ 1057 unsigned int max_inbound_streams; 1058 1059 /* the cookie life I award for any cookie, in seconds */ 1060 unsigned int cookie_life; 1061 /* time to delay acks for */ 1062 unsigned int delayed_ack; 1063 unsigned int old_delayed_ack; 1064 unsigned int sack_freq; 1065 unsigned int data_pkts_seen; 1066 1067 unsigned int numduptsns; 1068 int dup_tsns[SCTP_MAX_DUP_TSNS]; 1069 unsigned int initial_init_rto_max; /* initial RTO for INIT's */ 1070 unsigned int initial_rto; /* initial send RTO */ 1071 unsigned int minrto; /* per assoc RTO-MIN */ 1072 unsigned int maxrto; /* per assoc RTO-MAX */ 1073 1074 /* authentication fields */ 1075 sctp_auth_chklist_t *local_auth_chunks; 1076 sctp_auth_chklist_t *peer_auth_chunks; 1077 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 1078 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 1079 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 1080 sctp_authinfo_t authinfo; /* randoms, cached keys */ 1081 /* 1082 * refcnt to block freeing when a sender or receiver is off coping 1083 * user data in. 1084 */ 1085 uint32_t refcnt; 1086 uint32_t chunks_on_out_queue; /* total chunks floating around, 1087 * locked by send socket buffer */ 1088 uint32_t peers_adaptation; 1089 uint16_t peer_hmac_id; /* peer HMAC id to send */ 1090 1091 /* 1092 * Being that we have no bag to collect stale cookies, and that we 1093 * really would not want to anyway.. we will count them in this 1094 * counter. We of course feed them to the pigeons right away (I have 1095 * always thought of pigeons as flying rats). 1096 */ 1097 uint16_t stale_cookie_count; 1098 1099 /* 1100 * For the partial delivery API, if up, invoked this is what last 1101 * TSN I delivered 1102 */ 1103 uint16_t str_of_pdapi; 1104 uint16_t ssn_of_pdapi; 1105 1106 /* counts of actual built streams. Allocation may be more however */ 1107 /* could re-arrange to optimize space here. */ 1108 uint16_t streamincnt; 1109 uint16_t streamoutcnt; 1110 uint16_t strm_realoutsize; 1111 uint16_t strm_pending_add_size; 1112 /* my maximum number of retrans of INIT and SEND */ 1113 /* copied from SCTP but should be individually setable */ 1114 uint16_t max_init_times; 1115 uint16_t max_send_times; 1116 1117 uint16_t def_net_failure; 1118 1119 uint16_t def_net_pf_threshold; 1120 1121 /* 1122 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 1123 * awaiting ACK 1124 */ 1125 uint16_t mapping_array_size; 1126 1127 uint16_t last_strm_seq_delivered; 1128 uint16_t last_strm_no_delivered; 1129 1130 uint16_t last_revoke_count; 1131 int16_t num_send_timers_up; 1132 1133 uint16_t stream_locked_on; 1134 uint16_t ecn_echo_cnt_onq; 1135 1136 uint16_t free_chunk_cnt; 1137 uint8_t stream_locked; 1138 uint8_t authenticated; /* packet authenticated ok */ 1139 /* 1140 * This flag indicates that a SACK need to be sent. Initially this 1141 * is 1 to send the first sACK immediately. 1142 */ 1143 uint8_t send_sack; 1144 1145 /* max burst of new packets into the network */ 1146 uint32_t max_burst; 1147 /* max burst of fast retransmit packets */ 1148 uint32_t fr_max_burst; 1149 1150 uint8_t sat_network; /* RTT is in range of sat net or greater */ 1151 uint8_t sat_network_lockout; /* lockout code */ 1152 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 1153 /* flag goes on when we are doing a partial delivery api */ 1154 uint8_t hb_random_values[4]; 1155 uint8_t fragmented_delivery_inprogress; 1156 uint8_t fragment_flags; 1157 uint8_t last_flags_delivered; 1158 uint8_t hb_ect_randombit; 1159 uint8_t hb_random_idx; 1160 uint8_t default_dscp; 1161 uint8_t asconf_del_pending; /* asconf delete last addr pending */ 1162 uint8_t trigger_reset; 1163 /* 1164 * This value, plus all other ack'd but above cum-ack is added 1165 * together to cross check against the bit that we have yet to 1166 * define (probably in the SACK). When the cum-ack is updated, this 1167 * sum is updated as well. 1168 */ 1169 1170 /* Flags whether an extension is supported or not */ 1171 uint8_t ecn_supported; 1172 uint8_t prsctp_supported; 1173 uint8_t auth_supported; 1174 uint8_t asconf_supported; 1175 uint8_t reconfig_supported; 1176 uint8_t nrsack_supported; 1177 uint8_t pktdrop_supported; 1178 1179 /* Did the peer make the stream config (add out) request */ 1180 uint8_t peer_req_out; 1181 1182 uint8_t local_strreset_support; 1183 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