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 tsn; 80 uint32_t number_entries; 81 uint16_t list_of_streams[]; 82}; 83 84TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list); 85 86/* 87 * Users of the iterator need to malloc a iterator with a call to 88 * sctp_initiate_iterator(inp_func, assoc_func, inp_func, pcb_flags, pcb_features, 89 * asoc_state, void-ptr-arg, uint32-arg, end_func, inp); 90 * 91 * Use the following two defines if you don't care what pcb flags are on the EP 92 * and/or you don't care what state the association is in. 93 * 94 * Note that if you specify an INP as the last argument then ONLY each 95 * association of that single INP will be executed upon. Note that the pcb 96 * flags STILL apply so if the inp you specify has different pcb_flags then 97 * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to 98 * assure the inp you specify gets treated. 99 */ 100#define SCTP_PCB_ANY_FLAGS 0x00000000 101#define SCTP_PCB_ANY_FEATURES 0x00000000 102#define SCTP_ASOC_ANY_STATE 0x00000000 103 104typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr, 105 uint32_t val); 106typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val); 107typedef void (*end_func) (void *ptr, uint32_t val); 108 109#if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 110/* whats on the mcore control struct */ 111struct sctp_mcore_queue { 112 TAILQ_ENTRY(sctp_mcore_queue) next; 113 struct vnet *vn; 114 struct mbuf *m; 115 int off; 116 int v6; 117}; 118 119TAILQ_HEAD(sctp_mcore_qhead, sctp_mcore_queue); 120 121struct sctp_mcore_ctrl { 122 SCTP_PROCESS_STRUCT thread_proc; 123 struct sctp_mcore_qhead que; 124 struct mtx core_mtx; 125 struct mtx que_mtx; 126 int running; 127 int cpuid; 128}; 129 130 131#endif 132 133 134struct sctp_iterator { 135 TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr; 136 struct vnet *vn; 137 struct sctp_timer tmr; 138 struct sctp_inpcb *inp; /* current endpoint */ 139 struct sctp_tcb *stcb; /* current* assoc */ 140 struct sctp_inpcb *next_inp; /* special hook to skip to */ 141 asoc_func function_assoc; /* per assoc function */ 142 inp_func function_inp; /* per endpoint function */ 143 inp_func function_inp_end; /* end INP function */ 144 end_func function_atend;/* iterator completion function */ 145 void *pointer; /* pointer for apply func to use */ 146 uint32_t val; /* value for apply func to use */ 147 uint32_t pcb_flags; /* endpoint flags being checked */ 148 uint32_t pcb_features; /* endpoint features being checked */ 149 uint32_t asoc_state; /* assoc state being checked */ 150 uint32_t iterator_flags; 151 uint8_t no_chunk_output; 152 uint8_t done_current_ep; 153}; 154 155/* iterator_flags values */ 156#define SCTP_ITERATOR_DO_ALL_INP 0x00000001 157#define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002 158 159 160TAILQ_HEAD(sctpiterators, sctp_iterator); 161 162struct sctp_copy_all { 163 struct sctp_inpcb *inp; /* ep */ 164 struct mbuf *m; 165 struct sctp_sndrcvinfo sndrcv; 166 int sndlen; 167 int cnt_sent; 168 int cnt_failed; 169}; 170 171struct sctp_asconf_iterator { 172 struct sctpladdr list_of_work; 173 int cnt; 174}; 175 176struct iterator_control { 177 struct mtx ipi_iterator_wq_mtx; 178 struct mtx it_mtx; 179 SCTP_PROCESS_STRUCT thread_proc; 180 struct sctpiterators iteratorhead; 181 struct sctp_iterator *cur_it; 182 uint32_t iterator_running; 183 uint32_t iterator_flags; 184}; 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 void *ro_lle; 192 void *ro_ia; 193 int ro_flags; 194 union sctp_sockstore _l_addr; /* remote peer addr */ 195 struct sctp_ifa *_s_addr; /* our selected src addr */ 196}; 197 198struct htcp { 199 uint16_t alpha; /* Fixed point arith, << 7 */ 200 uint8_t beta; /* Fixed point arith, << 7 */ 201 uint8_t modeswitch; /* Delay modeswitch until we had at least one 202 * congestion event */ 203 uint32_t last_cong; /* Time since last congestion event end */ 204 uint32_t undo_last_cong; 205 uint16_t bytes_acked; 206 uint32_t bytecount; 207 uint32_t minRTT; 208 uint32_t maxRTT; 209 210 uint32_t undo_maxRTT; 211 uint32_t undo_old_maxB; 212 213 /* Bandwidth estimation */ 214 uint32_t minB; 215 uint32_t maxB; 216 uint32_t old_maxB; 217 uint32_t Bi; 218 uint32_t lasttime; 219}; 220 221struct rtcc_cc { 222 struct timeval tls; /* The time we started the sending */ 223 uint64_t lbw; /* Our last estimated bw */ 224 uint64_t lbw_rtt; /* RTT at bw estimate */ 225 uint64_t bw_bytes; /* The total bytes since this sending began */ 226 uint64_t bw_tot_time; /* The total time since sending began */ 227 uint64_t new_tot_time; /* temp holding the new value */ 228 uint64_t bw_bytes_at_last_rttc; /* What bw_bytes was at last rtt calc */ 229 uint32_t cwnd_at_bw_set;/* Cwnd at last bw saved - lbw */ 230 uint32_t vol_reduce; /* cnt of voluntary reductions */ 231 uint16_t steady_step; /* The number required to be in steady state */ 232 uint16_t step_cnt; /* The current number */ 233 uint8_t ret_from_eq; /* When all things are equal what do I return 234 * 0/1 - 1 no cc advance */ 235 uint8_t use_dccc_ecn; /* Flag to enable DCCC ECN */ 236 uint8_t tls_needs_set; /* Flag to indicate we need to set tls 0 or 1 237 * means set at send 2 not */ 238 uint8_t last_step_state;/* Last state if steady state stepdown is on */ 239 uint8_t rtt_set_this_sack; /* Flag saying this sack had RTT calc 240 * on it */ 241 uint8_t last_inst_ind; /* Last saved inst indication */ 242}; 243 244 245struct sctp_nets { 246 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */ 247 248 /* 249 * Things on the top half may be able to be split into a common 250 * structure shared by all. 251 */ 252 struct sctp_timer pmtu_timer; 253 struct sctp_timer hb_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; 276 277 /* last time in seconds I sent to it */ 278 struct timeval last_sent_time; 279 union cc_control_data { 280 struct htcp htcp_ca; /* JRS - struct used in HTCP algorithm */ 281 struct rtcc_cc rtcc; /* rtcc module cc stuff */ 282 } cc_mod; 283 int ref_count; 284 285 /* Congestion stats per destination */ 286 /* 287 * flight size variables and such, sorry Vern, I could not avoid 288 * this if I wanted performance :> 289 */ 290 uint32_t flight_size; 291 uint32_t cwnd; /* actual cwnd */ 292 uint32_t prev_cwnd; /* cwnd before any processing */ 293 uint32_t ecn_prev_cwnd; /* ECN prev cwnd at first ecn_echo seen in new 294 * window */ 295 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */ 296 /* tracking variables to avoid the aloc/free in sack processing */ 297 unsigned int net_ack; 298 unsigned int net_ack2; 299 300 /* 301 * JRS - 5/8/07 - Variable to track last time a destination was 302 * active for CMT PF 303 */ 304 uint32_t last_active; 305 306 /* 307 * CMT variables (iyengar@cis.udel.edu) 308 */ 309 uint32_t this_sack_highest_newack; /* tracks highest TSN newly 310 * acked for a given dest in 311 * the current SACK. Used in 312 * SFR and HTNA algos */ 313 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected 314 * pseudo-cumack for this destination */ 315 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next 316 * expected pseudo-cumack for this 317 * destination */ 318 319 /* CMT fast recovery variables */ 320 uint32_t fast_recovery_tsn; 321 uint32_t heartbeat_random1; 322 uint32_t heartbeat_random2; 323#ifdef INET6 324 uint32_t flowlabel; 325#endif 326 uint8_t dscp; 327 328 struct timeval start_time; /* time when this net was created */ 329 uint32_t marked_retrans;/* number or DATA chunks marked for timer 330 * based retransmissions */ 331 uint32_t marked_fastretrans; 332 uint32_t heart_beat_delay; /* Heart Beat delay in ms */ 333 334 /* if this guy is ok or not ... status */ 335 uint16_t dest_state; 336 /* number of timeouts to consider the destination unreachable */ 337 uint16_t failure_threshold; 338 /* number of timeouts to consider the destination potentially failed */ 339 uint16_t pf_threshold; 340 /* error stats on the destination */ 341 uint16_t error_count; 342 /* UDP port number in case of UDP tunneling */ 343 uint16_t port; 344 345 uint8_t fast_retran_loss_recovery; 346 uint8_t will_exit_fast_recovery; 347 /* Flags that probably can be combined into dest_state */ 348 uint8_t fast_retran_ip; /* fast retransmit in progress */ 349 uint8_t hb_responded; 350 uint8_t saw_newack; /* CMT's SFR algorithm flag */ 351 uint8_t src_addr_selected; /* if we split we move */ 352 uint8_t indx_of_eligible_next_to_use; 353 uint8_t addr_is_local; /* its a local address (if known) could move 354 * in split */ 355 356 /* 357 * CMT variables (iyengar@cis.udel.edu) 358 */ 359 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to 360 * find a new pseudocumack. This flag 361 * is set after a new pseudo-cumack 362 * has been received and indicates 363 * that the sender should find the 364 * next pseudo-cumack expected for 365 * this destination */ 366 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to 367 * find a new rtx-pseudocumack. This 368 * flag is set after a new 369 * rtx-pseudo-cumack has been received 370 * and indicates that the sender 371 * should find the next 372 * rtx-pseudo-cumack expected for this 373 * destination */ 374 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to 375 * indicate if a new pseudo-cumack or 376 * rtx-pseudo-cumack has been received */ 377 uint8_t window_probe; /* Doing a window probe? */ 378 uint8_t RTO_measured; /* Have we done the first measure */ 379 uint8_t last_hs_used; /* index into the last HS table entry we used */ 380 uint8_t lan_type; 381 uint8_t rto_needed; 382 uint32_t flowid; 383#ifdef INVARIANTS 384 uint8_t flowidset; 385#endif 386}; 387 388 389struct sctp_data_chunkrec { 390 uint32_t TSN_seq; /* the TSN of this transmit */ 391 uint16_t stream_seq; /* the stream sequence number of this transmit */ 392 uint16_t stream_number; /* the stream number of this guy */ 393 uint32_t payloadtype; 394 uint32_t context; /* from send */ 395 uint32_t cwnd_at_send; 396 /* 397 * part of the Highest sacked algorithm to be able to stroke counts 398 * on ones that are FR'd. 399 */ 400 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 401 struct timeval timetodrop; /* time we drop it from queue */ 402 uint8_t doing_fast_retransmit; 403 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 404 * outbound holds sending flags for PR-SCTP. */ 405 uint8_t state_flags; 406 uint8_t chunk_was_revoked; 407 uint8_t fwd_tsn_cnt; 408}; 409 410TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 411 412/* The lower byte is used to enumerate PR_SCTP policies */ 413#define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 414#define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 415#define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 416 417/* The upper byte is used as a bit mask */ 418#define CHUNK_FLAGS_FRAGMENT_OK 0x0100 419 420struct chk_id { 421 uint16_t id; 422 uint16_t can_take_data; 423}; 424 425 426struct sctp_tmit_chunk { 427 union { 428 struct sctp_data_chunkrec data; 429 struct chk_id chunk_id; 430 } rec; 431 struct sctp_association *asoc; /* bp to asoc this belongs to */ 432 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 433 struct mbuf *data; /* pointer to mbuf chain of data */ 434 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 435 struct sctp_nets *whoTo; 436 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 437 int32_t sent; /* the send status */ 438 uint16_t snd_count; /* number of times I sent */ 439 uint16_t flags; /* flags, such as FRAGMENT_OK */ 440 uint16_t send_size; 441 uint16_t book_size; 442 uint16_t mbcnt; 443 uint16_t auth_keyid; 444 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */ 445 uint8_t pad_inplace; 446 uint8_t do_rtt; 447 uint8_t book_size_scale; 448 uint8_t no_fr_allowed; 449 uint8_t copy_by_ref; 450 uint8_t window_probe; 451}; 452 453/* 454 * The first part of this structure MUST be the entire sinfo structure. Maybe 455 * I should have made it a sub structure... we can circle back later and do 456 * that if we want. 457 */ 458struct sctp_queued_to_read { /* sinfo structure Pluse more */ 459 uint16_t sinfo_stream; /* off the wire */ 460 uint16_t sinfo_ssn; /* off the wire */ 461 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for 462 * EOR */ 463 uint32_t sinfo_ppid; /* off the wire */ 464 uint32_t sinfo_context; /* pick this up from assoc def context? */ 465 uint32_t sinfo_timetolive; /* not used by kernel */ 466 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */ 467 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */ 468 sctp_assoc_t sinfo_assoc_id; /* our assoc id */ 469 /* Non sinfo stuff */ 470 uint32_t length; /* length of data */ 471 uint32_t held_length; /* length held in sb */ 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 uint16_t port_from; 481 uint16_t spec_flags; /* Flags to hold the notification field */ 482 uint8_t do_not_ref_stcb; 483 uint8_t end_added; 484 uint8_t pdapi_aborted; 485 uint8_t some_taken; 486}; 487 488/* This data structure will be on the outbound 489 * stream queues. Data will be pulled off from 490 * the front of the mbuf data and chunk-ified 491 * by the output routines. We will custom 492 * fit every chunk we pull to the send/sent 493 * queue to make up the next full packet 494 * if we can. An entry cannot be removed 495 * from the stream_out queue until 496 * the msg_is_complete flag is set. This 497 * means at times data/tail_mbuf MIGHT 498 * be NULL.. If that occurs it happens 499 * for one of two reasons. Either the user 500 * is blocked on a send() call and has not 501 * awoken to copy more data down... OR 502 * the user is in the explict MSG_EOR mode 503 * and wrote some data, but has not completed 504 * sending. 505 */ 506struct sctp_stream_queue_pending { 507 struct mbuf *data; 508 struct mbuf *tail_mbuf; 509 struct timeval ts; 510 struct sctp_nets *net; 511 TAILQ_ENTRY(sctp_stream_queue_pending) next; 512 TAILQ_ENTRY(sctp_stream_queue_pending) ss_next; 513 uint32_t length; 514 uint32_t timetolive; 515 uint32_t ppid; 516 uint32_t context; 517 uint16_t sinfo_flags; 518 uint16_t stream; 519 uint16_t act_flags; 520 uint16_t auth_keyid; 521 uint8_t holds_key_ref; 522 uint8_t msg_is_complete; 523 uint8_t some_taken; 524 uint8_t sender_all_done; 525 uint8_t put_last_out; 526 uint8_t discard_rest; 527}; 528 529/* 530 * this struct contains info that is used to track inbound stream data and 531 * help with ordering. 532 */ 533TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 534struct sctp_stream_in { 535 struct sctp_readhead inqueue; 536 uint16_t stream_no; 537 uint16_t last_sequence_delivered; /* used for re-order */ 538 uint8_t delivery_started; 539}; 540 541TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 542TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending); 543 544/* Round-robin schedulers */ 545struct ss_rr { 546 /* next link in wheel */ 547 TAILQ_ENTRY(sctp_stream_out) next_spoke; 548}; 549 550/* Priority scheduler */ 551struct ss_prio { 552 /* next link in wheel */ 553 TAILQ_ENTRY(sctp_stream_out) next_spoke; 554 /* priority id */ 555 uint16_t priority; 556}; 557 558/* Fair Bandwidth scheduler */ 559struct ss_fb { 560 /* next link in wheel */ 561 TAILQ_ENTRY(sctp_stream_out) next_spoke; 562 /* stores message size */ 563 int32_t rounds; 564}; 565 566/* 567 * This union holds all data necessary for 568 * different stream schedulers. 569 */ 570union scheduling_data { 571 struct sctpwheel_listhead out_wheel; 572 struct sctplist_listhead out_list; 573}; 574 575/* 576 * This union holds all parameters per stream 577 * necessary for different stream schedulers. 578 */ 579union scheduling_parameters { 580 struct ss_rr rr; 581 struct ss_prio prio; 582 struct ss_fb fb; 583}; 584 585/* This struct is used to track the traffic on outbound streams */ 586struct sctp_stream_out { 587 struct sctp_streamhead outqueue; 588 union scheduling_parameters ss_params; 589 uint32_t chunks_on_queues; 590 uint16_t stream_no; 591 uint16_t next_sequence_send; /* next one I expect to send out */ 592 uint8_t last_msg_incomplete; 593}; 594 595/* used to keep track of the addresses yet to try to add/delete */ 596TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 597struct sctp_asconf_addr { 598 TAILQ_ENTRY(sctp_asconf_addr) next; 599 struct sctp_asconf_addr_param ap; 600 struct sctp_ifa *ifa; /* save the ifa for add/del ip */ 601 uint8_t sent; /* has this been sent yet? */ 602 uint8_t special_del; /* not to be used in lookup */ 603}; 604 605struct sctp_scoping { 606 uint8_t ipv4_addr_legal; 607 uint8_t ipv6_addr_legal; 608 uint8_t loopback_scope; 609 uint8_t ipv4_local_scope; 610 uint8_t local_scope; 611 uint8_t site_scope; 612}; 613 614#define SCTP_TSN_LOG_SIZE 40 615 616struct sctp_tsn_log { 617 void *stcb; 618 uint32_t tsn; 619 uint16_t strm; 620 uint16_t seq; 621 uint16_t sz; 622 uint16_t flgs; 623 uint16_t in_pos; 624 uint16_t in_out; 625}; 626 627#define SCTP_FS_SPEC_LOG_SIZE 200 628struct sctp_fs_spec_log { 629 uint32_t sent; 630 uint32_t total_flight; 631 uint32_t tsn; 632 uint16_t book; 633 uint8_t incr; 634 uint8_t decr; 635}; 636 637/* This struct is here to cut out the compatiabilty 638 * pad that bulks up both the inp and stcb. The non 639 * pad portion MUST stay in complete sync with 640 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added 641 * this must be done here too. 642 */ 643struct sctp_nonpad_sndrcvinfo { 644 uint16_t sinfo_stream; 645 uint16_t sinfo_ssn; 646 uint16_t sinfo_flags; 647 uint32_t sinfo_ppid; 648 uint32_t sinfo_context; 649 uint32_t sinfo_timetolive; 650 uint32_t sinfo_tsn; 651 uint32_t sinfo_cumtsn; 652 sctp_assoc_t sinfo_assoc_id; 653 uint16_t sinfo_keynumber; 654 uint16_t sinfo_keynumber_valid; 655}; 656 657/* 658 * JRS - Structure to hold function pointers to the functions responsible 659 * for congestion control. 660 */ 661 662struct sctp_cc_functions { 663 void (*sctp_set_initial_cc_param) (struct sctp_tcb *stcb, struct sctp_nets *net); 664 void (*sctp_cwnd_update_after_sack) (struct sctp_tcb *stcb, 665 struct sctp_association *asoc, 666 int accum_moved, int reneged_all, int will_exit); 667 void (*sctp_cwnd_update_exit_pf) (struct sctp_tcb *stcb, struct sctp_nets *net); 668 void (*sctp_cwnd_update_after_fr) (struct sctp_tcb *stcb, 669 struct sctp_association *asoc); 670 void (*sctp_cwnd_update_after_timeout) (struct sctp_tcb *stcb, 671 struct sctp_nets *net); 672 void (*sctp_cwnd_update_after_ecn_echo) (struct sctp_tcb *stcb, 673 struct sctp_nets *net, int in_window, int num_pkt_lost); 674 void (*sctp_cwnd_update_after_packet_dropped) (struct sctp_tcb *stcb, 675 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp, 676 uint32_t * bottle_bw, uint32_t * on_queue); 677 void (*sctp_cwnd_update_after_output) (struct sctp_tcb *stcb, 678 struct sctp_nets *net, int burst_limit); 679 void (*sctp_cwnd_update_packet_transmitted) (struct sctp_tcb *stcb, 680 struct sctp_nets *net); 681 void (*sctp_cwnd_update_tsn_acknowledged) (struct sctp_nets *net, 682 struct sctp_tmit_chunk *); 683 void (*sctp_cwnd_new_transmission_begins) (struct sctp_tcb *stcb, 684 struct sctp_nets *net); 685 void (*sctp_cwnd_prepare_net_for_sack) (struct sctp_tcb *stcb, 686 struct sctp_nets *net); 687 int (*sctp_cwnd_socket_option) (struct sctp_tcb *stcb, int set, struct sctp_cc_option *); 688 void (*sctp_rtt_calculated) (struct sctp_tcb *, struct sctp_nets *, struct timeval *); 689}; 690 691/* 692 * RS - Structure to hold function pointers to the functions responsible 693 * for stream scheduling. 694 */ 695struct sctp_ss_functions { 696 void (*sctp_ss_init) (struct sctp_tcb *stcb, struct sctp_association *asoc, 697 int holds_lock); 698 void (*sctp_ss_clear) (struct sctp_tcb *stcb, struct sctp_association *asoc, 699 int clear_values, int holds_lock); 700 void (*sctp_ss_init_stream) (struct sctp_stream_out *strq, struct sctp_stream_out *with_strq); 701 void (*sctp_ss_add_to_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 702 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 703 int (*sctp_ss_is_empty) (struct sctp_tcb *stcb, struct sctp_association *asoc); 704 void (*sctp_ss_remove_from_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 705 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 706 struct sctp_stream_out *(*sctp_ss_select_stream) (struct sctp_tcb *stcb, 707 struct sctp_nets *net, struct sctp_association *asoc); 708 void (*sctp_ss_scheduled) (struct sctp_tcb *stcb, struct sctp_nets *net, 709 struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much); 710 void (*sctp_ss_packet_done) (struct sctp_tcb *stcb, struct sctp_nets *net, 711 struct sctp_association *asoc); 712 int (*sctp_ss_get_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 713 struct sctp_stream_out *strq, uint16_t * value); 714 int (*sctp_ss_set_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 715 struct sctp_stream_out *strq, uint16_t value); 716}; 717 718/* used to save ASCONF chunks for retransmission */ 719TAILQ_HEAD(sctp_asconf_head, sctp_asconf); 720struct sctp_asconf { 721 TAILQ_ENTRY(sctp_asconf) next; 722 uint32_t serial_number; 723 uint16_t snd_count; 724 struct mbuf *data; 725 uint16_t len; 726}; 727 728/* used to save ASCONF-ACK chunks for retransmission */ 729TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack); 730struct sctp_asconf_ack { 731 TAILQ_ENTRY(sctp_asconf_ack) next; 732 uint32_t serial_number; 733 struct sctp_nets *last_sent_to; 734 struct mbuf *data; 735 uint16_t len; 736}; 737 738/* 739 * Here we have information about each individual association that we track. 740 * We probably in production would be more dynamic. But for ease of 741 * implementation we will have a fixed array that we hunt for in a linear 742 * fashion. 743 */ 744struct sctp_association { 745 /* association state */ 746 int state; 747 748 /* queue of pending addrs to add/delete */ 749 struct sctp_asconf_addrhead asconf_queue; 750 751 struct timeval time_entered; /* time we entered state */ 752 struct timeval time_last_rcvd; 753 struct timeval time_last_sent; 754 struct timeval time_last_sat_advance; 755 struct sctp_nonpad_sndrcvinfo def_send; 756 757 /* timers and such */ 758 struct sctp_timer dack_timer; /* Delayed ack timer */ 759 struct sctp_timer asconf_timer; /* asconf */ 760 struct sctp_timer strreset_timer; /* stream reset */ 761 struct sctp_timer shut_guard_timer; /* shutdown guard */ 762 struct sctp_timer autoclose_timer; /* automatic close timer */ 763 struct sctp_timer delayed_event_timer; /* timer for delayed events */ 764 struct sctp_timer delete_prim_timer; /* deleting primary dst */ 765 766 /* list of restricted local addresses */ 767 struct sctpladdr sctp_restricted_addrs; 768 769 /* last local address pending deletion (waiting for an address add) */ 770 struct sctp_ifa *asconf_addr_del_pending; 771 /* Deleted primary destination (used to stop timer) */ 772 struct sctp_nets *deleted_primary; 773 774 struct sctpnetlisthead nets; /* remote address list */ 775 776 /* Free chunk list */ 777 struct sctpchunk_listhead free_chunks; 778 779 /* Control chunk queue */ 780 struct sctpchunk_listhead control_send_queue; 781 782 /* ASCONF chunk queue */ 783 struct sctpchunk_listhead asconf_send_queue; 784 785 /* 786 * Once a TSN hits the wire it is moved to the sent_queue. We 787 * maintain two counts here (don't know if any but retran_cnt is 788 * needed). The idea is that the sent_queue_retran_cnt reflects how 789 * many chunks have been marked for retranmission by either T3-rxt 790 * or FR. 791 */ 792 struct sctpchunk_listhead sent_queue; 793 struct sctpchunk_listhead send_queue; 794 795 /* re-assembly queue for fragmented chunks on the inbound path */ 796 struct sctpchunk_listhead reasmqueue; 797 798 /* Scheduling queues */ 799 union scheduling_data ss_data; 800 801 /* 802 * This pointer will be set to NULL most of the time. But when we 803 * have a fragmented message, where we could not get out all of the 804 * message at the last send then this will point to the stream to go 805 * get data from. 806 */ 807 struct sctp_stream_out *locked_on_sending; 808 809 /* If an iterator is looking at me, this is it */ 810 struct sctp_iterator *stcb_starting_point_for_iterator; 811 812 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 813 struct sctp_asconf_ackhead asconf_ack_sent; 814 815 /* 816 * pointer to last stream reset queued to control queue by us with 817 * requests. 818 */ 819 struct sctp_tmit_chunk *str_reset; 820 /* 821 * if Source Address Selection happening, this will rotate through 822 * the link list. 823 */ 824 struct sctp_laddr *last_used_address; 825 826 /* stream arrays */ 827 struct sctp_stream_in *strmin; 828 struct sctp_stream_out *strmout; 829 uint8_t *mapping_array; 830 /* primary destination to use */ 831 struct sctp_nets *primary_destination; 832 struct sctp_nets *alternate; /* If primary is down or PF */ 833 /* For CMT */ 834 struct sctp_nets *last_net_cmt_send_started; 835 /* last place I got a data chunk from */ 836 struct sctp_nets *last_data_chunk_from; 837 /* last place I got a control from */ 838 struct sctp_nets *last_control_chunk_from; 839 840 /* circular looking for output selection */ 841 struct sctp_stream_out *last_out_stream; 842 843 /* 844 * wait to the point the cum-ack passes req->send_reset_at_tsn for 845 * any req on the list. 846 */ 847 struct sctp_resethead resetHead; 848 849 /* queue of chunks waiting to be sent into the local stack */ 850 struct sctp_readhead pending_reply_queue; 851 852 /* JRS - the congestion control functions are in this struct */ 853 struct sctp_cc_functions cc_functions; 854 /* 855 * JRS - value to store the currently loaded congestion control 856 * module 857 */ 858 uint32_t congestion_control_module; 859 /* RS - the stream scheduling functions are in this struct */ 860 struct sctp_ss_functions ss_functions; 861 /* RS - value to store the currently loaded stream scheduling module */ 862 uint32_t stream_scheduling_module; 863 864 uint32_t vrf_id; 865 866 uint32_t cookie_preserve_req; 867 /* ASCONF next seq I am sending out, inits at init-tsn */ 868 uint32_t asconf_seq_out; 869 uint32_t asconf_seq_out_acked; 870 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 871 uint32_t asconf_seq_in; 872 873 /* next seq I am sending in str reset messages */ 874 uint32_t str_reset_seq_out; 875 /* next seq I am expecting in str reset messages */ 876 uint32_t str_reset_seq_in; 877 878 /* various verification tag information */ 879 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 880 * by remote end, and I have unlocked this 881 * will be regenerated to a new random value. */ 882 uint32_t peer_vtag; /* The peers last tag */ 883 884 uint32_t my_vtag_nonce; 885 uint32_t peer_vtag_nonce; 886 887 uint32_t assoc_id; 888 889 /* This is the SCTP fragmentation threshold */ 890 uint32_t smallest_mtu; 891 892 /* 893 * Special hook for Fast retransmit, allows us to track the highest 894 * TSN that is NEW in this SACK if gap ack blocks are present. 895 */ 896 uint32_t this_sack_highest_gap; 897 898 /* 899 * The highest consecutive TSN that has been acked by peer on my 900 * sends 901 */ 902 uint32_t last_acked_seq; 903 904 /* The next TSN that I will use in sending. */ 905 uint32_t sending_seq; 906 907 /* Original seq number I used ??questionable to keep?? */ 908 uint32_t init_seq_number; 909 910 911 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 912 /* (A1 in Section 4.2) */ 913 uint32_t advanced_peer_ack_point; 914 915 /* 916 * The highest consequetive TSN at the bottom of the mapping array 917 * (for his sends). 918 */ 919 uint32_t cumulative_tsn; 920 /* 921 * Used to track the mapping array and its offset bits. This MAY be 922 * lower then cumulative_tsn. 923 */ 924 uint32_t mapping_array_base_tsn; 925 /* 926 * used to track highest TSN we have received and is listed in the 927 * mapping array. 928 */ 929 uint32_t highest_tsn_inside_map; 930 931 /* EY - new NR variables used for nr_sack based on mapping_array */ 932 uint8_t *nr_mapping_array; 933 uint32_t highest_tsn_inside_nr_map; 934 935 uint32_t fast_recovery_tsn; 936 uint32_t sat_t3_recovery_tsn; 937 uint32_t tsn_last_delivered; 938 /* 939 * For the pd-api we should re-write this a bit more efficent. We 940 * could have multiple sctp_queued_to_read's that we are building at 941 * once. Now we only do this when we get ready to deliver to the 942 * socket buffer. Note that we depend on the fact that the struct is 943 * "stuck" on the read queue until we finish all the pd-api. 944 */ 945 struct sctp_queued_to_read *control_pdapi; 946 947 uint32_t tsn_of_pdapi_last_delivered; 948 uint32_t pdapi_ppid; 949 uint32_t context; 950 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 951 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 952 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 953#ifdef SCTP_ASOCLOG_OF_TSNS 954 /* 955 * special log - This adds considerable size to the asoc, but 956 * provides a log that you can use to detect problems via kgdb. 957 */ 958 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE]; 959 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE]; 960 uint32_t cumack_log[SCTP_TSN_LOG_SIZE]; 961 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE]; 962 uint16_t tsn_in_at; 963 uint16_t tsn_out_at; 964 uint16_t tsn_in_wrapped; 965 uint16_t tsn_out_wrapped; 966 uint16_t cumack_log_at; 967 uint16_t cumack_log_atsnt; 968#endif /* SCTP_ASOCLOG_OF_TSNS */ 969#ifdef SCTP_FS_SPEC_LOG 970 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE]; 971 uint16_t fs_index; 972#endif 973 974 /* 975 * window state information and smallest MTU that I use to bound 976 * segmentation 977 */ 978 uint32_t peers_rwnd; 979 uint32_t my_rwnd; 980 uint32_t my_last_reported_rwnd; 981 uint32_t sctp_frag_point; 982 983 uint32_t total_output_queue_size; 984 985 uint32_t sb_cc; /* shadow of sb_cc */ 986 uint32_t sb_send_resv; /* amount reserved on a send */ 987 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd 988 * control */ 989#ifdef INET6 990 uint32_t default_flowlabel; 991#endif 992 uint32_t pr_sctp_cnt; 993 int ctrl_queue_cnt; /* could be removed REM - NO IT CAN'T!! RRS */ 994 /* 995 * All outbound datagrams queue into this list from the individual 996 * stream queue. Here they get assigned a TSN and then await 997 * sending. The stream seq comes when it is first put in the 998 * individual str queue 999 */ 1000 unsigned int stream_queue_cnt; 1001 unsigned int send_queue_cnt; 1002 unsigned int sent_queue_cnt; 1003 unsigned int sent_queue_cnt_removeable; 1004 /* 1005 * Number on sent queue that are marked for retran until this value 1006 * is 0 we only send one packet of retran'ed data. 1007 */ 1008 unsigned int sent_queue_retran_cnt; 1009 1010 unsigned int size_on_reasm_queue; 1011 unsigned int cnt_on_reasm_queue; 1012 unsigned int fwd_tsn_cnt; 1013 /* amount of data (bytes) currently in flight (on all destinations) */ 1014 unsigned int total_flight; 1015 /* Total book size in flight */ 1016 unsigned int total_flight_count; /* count of chunks used with 1017 * book total */ 1018 /* count of destinaton nets and list of destination nets */ 1019 unsigned int numnets; 1020 1021 /* Total error count on this association */ 1022 unsigned int overall_error_count; 1023 1024 unsigned int cnt_msg_on_sb; 1025 1026 /* All stream count of chunks for delivery */ 1027 unsigned int size_on_all_streams; 1028 unsigned int cnt_on_all_streams; 1029 1030 /* Heart Beat delay in ms */ 1031 uint32_t heart_beat_delay; 1032 1033 /* autoclose */ 1034 unsigned int sctp_autoclose_ticks; 1035 1036 /* how many preopen streams we have */ 1037 unsigned int pre_open_streams; 1038 1039 /* How many streams I support coming into me */ 1040 unsigned int max_inbound_streams; 1041 1042 /* the cookie life I award for any cookie, in seconds */ 1043 unsigned int cookie_life; 1044 /* time to delay acks for */ 1045 unsigned int delayed_ack; 1046 unsigned int old_delayed_ack; 1047 unsigned int sack_freq; 1048 unsigned int data_pkts_seen; 1049 1050 unsigned int numduptsns; 1051 int dup_tsns[SCTP_MAX_DUP_TSNS]; 1052 unsigned int initial_init_rto_max; /* initial RTO for INIT's */ 1053 unsigned int initial_rto; /* initial send RTO */ 1054 unsigned int minrto; /* per assoc RTO-MIN */ 1055 unsigned int maxrto; /* per assoc RTO-MAX */ 1056 1057 /* authentication fields */ 1058 sctp_auth_chklist_t *local_auth_chunks; 1059 sctp_auth_chklist_t *peer_auth_chunks; 1060 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 1061 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 1062 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 1063 sctp_authinfo_t authinfo; /* randoms, cached keys */ 1064 /* 1065 * refcnt to block freeing when a sender or receiver is off coping 1066 * user data in. 1067 */ 1068 uint32_t refcnt; 1069 uint32_t chunks_on_out_queue; /* total chunks floating around, 1070 * locked by send socket buffer */ 1071 uint32_t peers_adaptation; 1072 uint16_t peer_hmac_id; /* peer HMAC id to send */ 1073 1074 /* 1075 * Being that we have no bag to collect stale cookies, and that we 1076 * really would not want to anyway.. we will count them in this 1077 * counter. We of course feed them to the pigeons right away (I have 1078 * always thought of pigeons as flying rats). 1079 */ 1080 uint16_t stale_cookie_count; 1081 1082 /* 1083 * For the partial delivery API, if up, invoked this is what last 1084 * TSN I delivered 1085 */ 1086 uint16_t str_of_pdapi; 1087 uint16_t ssn_of_pdapi; 1088 1089 /* counts of actual built streams. Allocation may be more however */ 1090 /* could re-arrange to optimize space here. */ 1091 uint16_t streamincnt; 1092 uint16_t streamoutcnt; 1093 uint16_t strm_realoutsize; 1094 uint16_t strm_pending_add_size; 1095 /* my maximum number of retrans of INIT and SEND */ 1096 /* copied from SCTP but should be individually setable */ 1097 uint16_t max_init_times; 1098 uint16_t max_send_times; 1099 1100 uint16_t def_net_failure; 1101 1102 uint16_t def_net_pf_threshold; 1103 1104 /* 1105 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 1106 * awaiting ACK 1107 */ 1108 uint16_t mapping_array_size; 1109 1110 uint16_t last_strm_seq_delivered; 1111 uint16_t last_strm_no_delivered; 1112 1113 uint16_t last_revoke_count; 1114 int16_t num_send_timers_up; 1115 1116 uint16_t stream_locked_on; 1117 uint16_t ecn_echo_cnt_onq; 1118 1119 uint16_t free_chunk_cnt; 1120 uint8_t stream_locked; 1121 uint8_t authenticated; /* packet authenticated ok */ 1122 /* 1123 * This flag indicates that a SACK need to be sent. Initially this 1124 * is 1 to send the first sACK immediately. 1125 */ 1126 uint8_t send_sack; 1127 1128 /* max burst of new packets into the network */ 1129 uint32_t max_burst; 1130 /* max burst of fast retransmit packets */ 1131 uint32_t fr_max_burst; 1132 1133 uint8_t sat_network; /* RTT is in range of sat net or greater */ 1134 uint8_t sat_network_lockout; /* lockout code */ 1135 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 1136 /* flag goes on when we are doing a partial delivery api */ 1137 uint8_t hb_random_values[4]; 1138 uint8_t fragmented_delivery_inprogress; 1139 uint8_t fragment_flags; 1140 uint8_t last_flags_delivered; 1141 uint8_t hb_ect_randombit; 1142 uint8_t hb_random_idx; 1143 uint8_t default_dscp; 1144 uint8_t asconf_del_pending; /* asconf delete last addr pending */ 1145 1146 /* 1147 * This value, plus all other ack'd but above cum-ack is added 1148 * together to cross check against the bit that we have yet to 1149 * define (probably in the SACK). When the cum-ack is updated, this 1150 * sum is updated as well. 1151 */ 1152 1153 /* Flag to tell if ECN is allowed */ 1154 uint8_t ecn_allowed; 1155 1156 /* Did the peer make the stream config (add out) request */ 1157 uint8_t peer_req_out; 1158 1159 /* flag to indicate if peer can do asconf */ 1160 uint8_t peer_supports_asconf; 1161 /* EY - flag to indicate if peer can do nr_sack */ 1162 uint8_t peer_supports_nr_sack; 1163 /* pr-sctp support flag */ 1164 uint8_t peer_supports_prsctp; 1165 /* peer authentication support flag */ 1166 uint8_t peer_supports_auth; 1167 /* stream resets are supported by the peer */ 1168 uint8_t peer_supports_strreset; 1169 uint8_t local_strreset_support; 1170 1171 uint8_t peer_supports_nat; 1172 /* 1173 * packet drop's are supported by the peer, we don't really care 1174 * about this but we bookkeep it anyway. 1175 */ 1176 uint8_t peer_supports_pktdrop; 1177 1178 struct sctp_scoping scope; 1179 /* flags to handle send alternate net tracking */ 1180 uint8_t used_alt_onsack; 1181 uint8_t used_alt_asconfack; 1182 uint8_t fast_retran_loss_recovery; 1183 uint8_t sat_t3_loss_recovery; 1184 uint8_t dropped_special_cnt; 1185 uint8_t seen_a_sack_this_pkt; 1186 uint8_t stream_reset_outstanding; 1187 uint8_t stream_reset_out_is_outstanding; 1188 uint8_t delayed_connection; 1189 uint8_t ifp_had_enobuf; 1190 uint8_t saw_sack_with_frags; 1191 uint8_t saw_sack_with_nr_frags; 1192 uint8_t in_asocid_hash; 1193 uint8_t assoc_up_sent; 1194 uint8_t adaptation_needed; 1195 uint8_t adaptation_sent; 1196 /* CMT variables */ 1197 uint8_t cmt_dac_pkts_rcvd; 1198 uint8_t sctp_cmt_on_off; 1199 uint8_t iam_blocking; 1200 uint8_t cookie_how[8]; 1201 /* EY 05/05/08 - NR_SACK variable */ 1202 uint8_t sctp_nr_sack_on_off; 1203 /* JRS 5/21/07 - CMT PF variable */ 1204 uint8_t sctp_cmt_pf; 1205 uint8_t use_precise_time; 1206 uint64_t sctp_features; 1207 uint16_t port; /* remote UDP encapsulation port */ 1208 /* 1209 * The mapping array is used to track out of order sequences above 1210 * last_acked_seq. 0 indicates packet missing 1 indicates packet 1211 * rec'd. We slide it up every time we raise last_acked_seq and 0 1212 * trailing locactions out. If I get a TSN above the array 1213 * mappingArraySz, I discard the datagram and let retransmit happen. 1214 */ 1215 uint32_t marked_retrans; 1216 uint32_t timoinit; 1217 uint32_t timodata; 1218 uint32_t timosack; 1219 uint32_t timoshutdown; 1220 uint32_t timoheartbeat; 1221 uint32_t timocookie; 1222 uint32_t timoshutdownack; 1223 struct timeval start_time; 1224 struct timeval discontinuity_time; 1225}; 1226 1227#endif 1228