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 43 struct 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 63 struct 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 */ 75 TAILQ_HEAD(sctpnetlisthead, sctp_nets); 76 77 struct 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 84 TAILQ_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 103 104 typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr, 105 uint32_t val); 106 typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val); 107 typedef 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 */ 111 struct 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 }; 118 119 TAILQ_HEAD(sctp_mcore_qhead, sctp_mcore_queue); 120 121 struct 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 132 133 134 struct 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 158 159 160 TAILQ_HEAD(sctpiterators, sctp_iterator); 161 162 struct 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 }; 170 171 struct sctp_asconf_iterator { 172 struct sctpladdr list_of_work; 173 int cnt; 174 }; 175 176 struct 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 188 189 struct 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 }; 197 198 struct 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 }; 220 221 struct 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 }; 243 244 245 struct 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 uint8_t flowtype; 384 }; 385 386 387 struct sctp_data_chunkrec { 388 uint32_t TSN_seq; /* the TSN of this transmit */ 389 uint16_t stream_seq; /* the stream sequence number of this transmit */ 390 uint16_t stream_number; /* the stream number of this guy */ 391 uint32_t payloadtype; 392 uint32_t context; /* from send */ 393 uint32_t cwnd_at_send; 394 /* 395 * part of the Highest sacked algorithm to be able to stroke counts 396 * on ones that are FR'd. 397 */ 398 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 399 struct timeval timetodrop; /* time we drop it from queue */ 400 uint8_t doing_fast_retransmit; 401 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 402 * outbound holds sending flags for PR-SCTP. */ 403 uint8_t state_flags; 404 uint8_t chunk_was_revoked; 405 uint8_t fwd_tsn_cnt; 406 }; 407 408 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 409 410 /* The lower byte is used to enumerate PR_SCTP policies */ 411 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 412 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 413 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 414 415 /* The upper byte is used as a bit mask */ 416 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100 417 418 struct chk_id { 419 uint8_t id; 420 uint8_t can_take_data; 421 }; 422 423 424 struct sctp_tmit_chunk { 425 union { 426 struct sctp_data_chunkrec data; 427 struct chk_id chunk_id; 428 } rec; 429 struct sctp_association *asoc; /* bp to asoc this belongs to */ 430 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 431 struct mbuf *data; /* pointer to mbuf chain of data */ 432 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 433 struct sctp_nets *whoTo; 434 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 435 int32_t sent; /* the send status */ 436 uint16_t snd_count; /* number of times I sent */ 437 uint16_t flags; /* flags, such as FRAGMENT_OK */ 438 uint16_t send_size; 439 uint16_t book_size; 440 uint16_t mbcnt; 441 uint16_t auth_keyid; 442 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */ 443 uint8_t pad_inplace; 444 uint8_t do_rtt; 445 uint8_t book_size_scale; 446 uint8_t no_fr_allowed; 447 uint8_t copy_by_ref; 448 uint8_t window_probe; 449 }; 450 451 /* 452 * The first part of this structure MUST be the entire sinfo structure. Maybe 453 * I should have made it a sub structure... we can circle back later and do 454 * that if we want. 455 */ 456 struct sctp_queued_to_read { /* sinfo structure Pluse more */ 457 uint16_t sinfo_stream; /* off the wire */ 458 uint16_t sinfo_ssn; /* off the wire */ 459 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for 460 * EOR */ 461 uint32_t sinfo_ppid; /* off the wire */ 462 uint32_t sinfo_context; /* pick this up from assoc def context? */ 463 uint32_t sinfo_timetolive; /* not used by kernel */ 464 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */ 465 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */ 466 sctp_assoc_t sinfo_assoc_id; /* our assoc id */ 467 /* Non sinfo stuff */ 468 uint32_t length; /* length of data */ 469 uint32_t held_length; /* length held in sb */ 470 struct sctp_nets *whoFrom; /* where it came from */ 471 struct mbuf *data; /* front of the mbuf chain of data with 472 * PKT_HDR */ 473 struct mbuf *tail_mbuf; /* used for multi-part data */ 474 struct mbuf *aux_data; /* used to hold/cache control if o/s does not 475 * take it from us */ 476 struct sctp_tcb *stcb; /* assoc, used for window update */ 477 TAILQ_ENTRY(sctp_queued_to_read) next; 478 uint16_t port_from; 479 uint16_t spec_flags; /* Flags to hold the notification field */ 480 uint8_t do_not_ref_stcb; 481 uint8_t end_added; 482 uint8_t pdapi_aborted; 483 uint8_t some_taken; 484 }; 485 486 /* This data structure will be on the outbound 487 * stream queues. Data will be pulled off from 488 * the front of the mbuf data and chunk-ified 489 * by the output routines. We will custom 490 * fit every chunk we pull to the send/sent 491 * queue to make up the next full packet 492 * if we can. An entry cannot be removed 493 * from the stream_out queue until 494 * the msg_is_complete flag is set. This 495 * means at times data/tail_mbuf MIGHT 496 * be NULL.. If that occurs it happens 497 * for one of two reasons. Either the user 498 * is blocked on a send() call and has not 499 * awoken to copy more data down... OR 500 * the user is in the explict MSG_EOR mode 501 * and wrote some data, but has not completed 502 * sending. 503 */ 504 struct sctp_stream_queue_pending { 505 struct mbuf *data; 506 struct mbuf *tail_mbuf; 507 struct timeval ts; 508 struct sctp_nets *net; 509 TAILQ_ENTRY(sctp_stream_queue_pending) next; 510 TAILQ_ENTRY(sctp_stream_queue_pending) ss_next; 511 uint32_t length; 512 uint32_t timetolive; 513 uint32_t ppid; 514 uint32_t context; 515 uint16_t sinfo_flags; 516 uint16_t stream; 517 uint16_t act_flags; 518 uint16_t auth_keyid; 519 uint8_t holds_key_ref; 520 uint8_t msg_is_complete; 521 uint8_t some_taken; 522 uint8_t sender_all_done; 523 uint8_t put_last_out; 524 uint8_t discard_rest; 525 }; 526 527 /* 528 * this struct contains info that is used to track inbound stream data and 529 * help with ordering. 530 */ 531 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 532 struct sctp_stream_in { 533 struct sctp_readhead inqueue; 534 uint16_t stream_no; 535 uint16_t last_sequence_delivered; /* used for re-order */ 536 uint8_t delivery_started; 537 }; 538 539 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 540 TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending); 541 542 /* Round-robin schedulers */ 543 struct ss_rr { 544 /* next link in wheel */ 545 TAILQ_ENTRY(sctp_stream_out) next_spoke; 546 }; 547 548 /* Priority scheduler */ 549 struct ss_prio { 550 /* next link in wheel */ 551 TAILQ_ENTRY(sctp_stream_out) next_spoke; 552 /* priority id */ 553 uint16_t priority; 554 }; 555 556 /* Fair Bandwidth scheduler */ 557 struct ss_fb { 558 /* next link in wheel */ 559 TAILQ_ENTRY(sctp_stream_out) next_spoke; 560 /* stores message size */ 561 int32_t rounds; 562 }; 563 564 /* 565 * This union holds all data necessary for 566 * different stream schedulers. 567 */ 568 union scheduling_data { 569 struct sctpwheel_listhead out_wheel; 570 struct sctplist_listhead out_list; 571 }; 572 573 /* 574 * This union holds all parameters per stream 575 * necessary for different stream schedulers. 576 */ 577 union scheduling_parameters { 578 struct ss_rr rr; 579 struct ss_prio prio; 580 struct ss_fb fb; 581 }; 582 583 /* This struct is used to track the traffic on outbound streams */ 584 struct sctp_stream_out { 585 struct sctp_streamhead outqueue; 586 union scheduling_parameters ss_params; 587 uint32_t chunks_on_queues; 588 #if defined(SCTP_DETAILED_STR_STATS) 589 uint32_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 590 uint32_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 591 #else 592 /* Only the aggregation */ 593 uint32_t abandoned_unsent[1]; 594 uint32_t abandoned_sent[1]; 595 #endif 596 uint16_t stream_no; 597 uint16_t next_sequence_send; /* next one I expect to send out */ 598 uint8_t last_msg_incomplete; 599 }; 600 601 /* used to keep track of the addresses yet to try to add/delete */ 602 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 603 struct sctp_asconf_addr { 604 TAILQ_ENTRY(sctp_asconf_addr) next; 605 struct sctp_asconf_addr_param ap; 606 struct sctp_ifa *ifa; /* save the ifa for add/del ip */ 607 uint8_t sent; /* has this been sent yet? */ 608 uint8_t special_del; /* not to be used in lookup */ 609 }; 610 611 struct sctp_scoping { 612 uint8_t ipv4_addr_legal; 613 uint8_t ipv6_addr_legal; 614 uint8_t loopback_scope; 615 uint8_t ipv4_local_scope; 616 uint8_t local_scope; 617 uint8_t site_scope; 618 }; 619 620 #define SCTP_TSN_LOG_SIZE 40 621 622 struct sctp_tsn_log { 623 void *stcb; 624 uint32_t tsn; 625 uint16_t strm; 626 uint16_t seq; 627 uint16_t sz; 628 uint16_t flgs; 629 uint16_t in_pos; 630 uint16_t in_out; 631 }; 632 633 #define SCTP_FS_SPEC_LOG_SIZE 200 634 struct sctp_fs_spec_log { 635 uint32_t sent; 636 uint32_t total_flight; 637 uint32_t tsn; 638 uint16_t book; 639 uint8_t incr; 640 uint8_t decr; 641 }; 642 643 /* This struct is here to cut out the compatiabilty 644 * pad that bulks up both the inp and stcb. The non 645 * pad portion MUST stay in complete sync with 646 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added 647 * this must be done here too. 648 */ 649 struct sctp_nonpad_sndrcvinfo { 650 uint16_t sinfo_stream; 651 uint16_t sinfo_ssn; 652 uint16_t sinfo_flags; 653 uint32_t sinfo_ppid; 654 uint32_t sinfo_context; 655 uint32_t sinfo_timetolive; 656 uint32_t sinfo_tsn; 657 uint32_t sinfo_cumtsn; 658 sctp_assoc_t sinfo_assoc_id; 659 uint16_t sinfo_keynumber; 660 uint16_t sinfo_keynumber_valid; 661 }; 662 663 /* 664 * JRS - Structure to hold function pointers to the functions responsible 665 * for congestion control. 666 */ 667 668 struct sctp_cc_functions { 669 void (*sctp_set_initial_cc_param) (struct sctp_tcb *stcb, struct sctp_nets *net); 670 void (*sctp_cwnd_update_after_sack) (struct sctp_tcb *stcb, 671 struct sctp_association *asoc, 672 int accum_moved, int reneged_all, int will_exit); 673 void (*sctp_cwnd_update_exit_pf) (struct sctp_tcb *stcb, struct sctp_nets *net); 674 void (*sctp_cwnd_update_after_fr) (struct sctp_tcb *stcb, 675 struct sctp_association *asoc); 676 void (*sctp_cwnd_update_after_timeout) (struct sctp_tcb *stcb, 677 struct sctp_nets *net); 678 void (*sctp_cwnd_update_after_ecn_echo) (struct sctp_tcb *stcb, 679 struct sctp_nets *net, int in_window, int num_pkt_lost); 680 void (*sctp_cwnd_update_after_packet_dropped) (struct sctp_tcb *stcb, 681 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp, 682 uint32_t * bottle_bw, uint32_t * on_queue); 683 void (*sctp_cwnd_update_after_output) (struct sctp_tcb *stcb, 684 struct sctp_nets *net, int burst_limit); 685 void (*sctp_cwnd_update_packet_transmitted) (struct sctp_tcb *stcb, 686 struct sctp_nets *net); 687 void (*sctp_cwnd_update_tsn_acknowledged) (struct sctp_nets *net, 688 struct sctp_tmit_chunk *); 689 void (*sctp_cwnd_new_transmission_begins) (struct sctp_tcb *stcb, 690 struct sctp_nets *net); 691 void (*sctp_cwnd_prepare_net_for_sack) (struct sctp_tcb *stcb, 692 struct sctp_nets *net); 693 int (*sctp_cwnd_socket_option) (struct sctp_tcb *stcb, int set, struct sctp_cc_option *); 694 void (*sctp_rtt_calculated) (struct sctp_tcb *, struct sctp_nets *, struct timeval *); 695 }; 696 697 /* 698 * RS - Structure to hold function pointers to the functions responsible 699 * for stream scheduling. 700 */ 701 struct sctp_ss_functions { 702 void (*sctp_ss_init) (struct sctp_tcb *stcb, struct sctp_association *asoc, 703 int holds_lock); 704 void (*sctp_ss_clear) (struct sctp_tcb *stcb, struct sctp_association *asoc, 705 int clear_values, int holds_lock); 706 void (*sctp_ss_init_stream) (struct sctp_stream_out *strq, struct sctp_stream_out *with_strq); 707 void (*sctp_ss_add_to_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 708 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 709 int (*sctp_ss_is_empty) (struct sctp_tcb *stcb, struct sctp_association *asoc); 710 void (*sctp_ss_remove_from_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 711 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 712 struct sctp_stream_out *(*sctp_ss_select_stream) (struct sctp_tcb *stcb, 713 struct sctp_nets *net, struct sctp_association *asoc); 714 void (*sctp_ss_scheduled) (struct sctp_tcb *stcb, struct sctp_nets *net, 715 struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much); 716 void (*sctp_ss_packet_done) (struct sctp_tcb *stcb, struct sctp_nets *net, 717 struct sctp_association *asoc); 718 int (*sctp_ss_get_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 719 struct sctp_stream_out *strq, uint16_t * value); 720 int (*sctp_ss_set_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 721 struct sctp_stream_out *strq, uint16_t value); 722 }; 723 724 /* used to save ASCONF chunks for retransmission */ 725 TAILQ_HEAD(sctp_asconf_head, sctp_asconf); 726 struct sctp_asconf { 727 TAILQ_ENTRY(sctp_asconf) next; 728 uint32_t serial_number; 729 uint16_t snd_count; 730 struct mbuf *data; 731 uint16_t len; 732 }; 733 734 /* used to save ASCONF-ACK chunks for retransmission */ 735 TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack); 736 struct sctp_asconf_ack { 737 TAILQ_ENTRY(sctp_asconf_ack) next; 738 uint32_t serial_number; 739 struct sctp_nets *last_sent_to; 740 struct mbuf *data; 741 uint16_t len; 742 }; 743 744 /* 745 * Here we have information about each individual association that we track. 746 * We probably in production would be more dynamic. But for ease of 747 * implementation we will have a fixed array that we hunt for in a linear 748 * fashion. 749 */ 750 struct sctp_association { 751 /* association state */ 752 int state; 753 754 /* queue of pending addrs to add/delete */ 755 struct sctp_asconf_addrhead asconf_queue; 756 757 struct timeval time_entered; /* time we entered state */ 758 struct timeval time_last_rcvd; 759 struct timeval time_last_sent; 760 struct timeval time_last_sat_advance; 761 struct sctp_nonpad_sndrcvinfo def_send; 762 763 /* timers and such */ 764 struct sctp_timer dack_timer; /* Delayed ack timer */ 765 struct sctp_timer asconf_timer; /* asconf */ 766 struct sctp_timer strreset_timer; /* stream reset */ 767 struct sctp_timer shut_guard_timer; /* shutdown guard */ 768 struct sctp_timer autoclose_timer; /* automatic close timer */ 769 struct sctp_timer delayed_event_timer; /* timer for delayed events */ 770 struct sctp_timer delete_prim_timer; /* deleting primary dst */ 771 772 /* list of restricted local addresses */ 773 struct sctpladdr sctp_restricted_addrs; 774 775 /* last local address pending deletion (waiting for an address add) */ 776 struct sctp_ifa *asconf_addr_del_pending; 777 /* Deleted primary destination (used to stop timer) */ 778 struct sctp_nets *deleted_primary; 779 780 struct sctpnetlisthead nets; /* remote address list */ 781 782 /* Free chunk list */ 783 struct sctpchunk_listhead free_chunks; 784 785 /* Control chunk queue */ 786 struct sctpchunk_listhead control_send_queue; 787 788 /* ASCONF chunk queue */ 789 struct sctpchunk_listhead asconf_send_queue; 790 791 /* 792 * Once a TSN hits the wire it is moved to the sent_queue. We 793 * maintain two counts here (don't know if any but retran_cnt is 794 * needed). The idea is that the sent_queue_retran_cnt reflects how 795 * many chunks have been marked for retranmission by either T3-rxt 796 * or FR. 797 */ 798 struct sctpchunk_listhead sent_queue; 799 struct sctpchunk_listhead send_queue; 800 801 /* re-assembly queue for fragmented chunks on the inbound path */ 802 struct sctpchunk_listhead reasmqueue; 803 804 /* Scheduling queues */ 805 union scheduling_data ss_data; 806 807 /* 808 * This pointer will be set to NULL most of the time. But when we 809 * have a fragmented message, where we could not get out all of the 810 * message at the last send then this will point to the stream to go 811 * get data from. 812 */ 813 struct sctp_stream_out *locked_on_sending; 814 815 /* If an iterator is looking at me, this is it */ 816 struct sctp_iterator *stcb_starting_point_for_iterator; 817 818 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 819 struct sctp_asconf_ackhead asconf_ack_sent; 820 821 /* 822 * pointer to last stream reset queued to control queue by us with 823 * requests. 824 */ 825 struct sctp_tmit_chunk *str_reset; 826 /* 827 * if Source Address Selection happening, this will rotate through 828 * the link list. 829 */ 830 struct sctp_laddr *last_used_address; 831 832 /* stream arrays */ 833 struct sctp_stream_in *strmin; 834 struct sctp_stream_out *strmout; 835 uint8_t *mapping_array; 836 /* primary destination to use */ 837 struct sctp_nets *primary_destination; 838 struct sctp_nets *alternate; /* If primary is down or PF */ 839 /* For CMT */ 840 struct sctp_nets *last_net_cmt_send_started; 841 /* last place I got a data chunk from */ 842 struct sctp_nets *last_data_chunk_from; 843 /* last place I got a control from */ 844 struct sctp_nets *last_control_chunk_from; 845 846 /* circular looking for output selection */ 847 struct sctp_stream_out *last_out_stream; 848 849 /* 850 * wait to the point the cum-ack passes req->send_reset_at_tsn for 851 * any req on the list. 852 */ 853 struct sctp_resethead resetHead; 854 855 /* queue of chunks waiting to be sent into the local stack */ 856 struct sctp_readhead pending_reply_queue; 857 858 /* JRS - the congestion control functions are in this struct */ 859 struct sctp_cc_functions cc_functions; 860 /* 861 * JRS - value to store the currently loaded congestion control 862 * module 863 */ 864 uint32_t congestion_control_module; 865 /* RS - the stream scheduling functions are in this struct */ 866 struct sctp_ss_functions ss_functions; 867 /* RS - value to store the currently loaded stream scheduling module */ 868 uint32_t stream_scheduling_module; 869 870 uint32_t vrf_id; 871 872 uint32_t cookie_preserve_req; 873 /* ASCONF next seq I am sending out, inits at init-tsn */ 874 uint32_t asconf_seq_out; 875 uint32_t asconf_seq_out_acked; 876 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 877 uint32_t asconf_seq_in; 878 879 /* next seq I am sending in str reset messages */ 880 uint32_t str_reset_seq_out; 881 /* next seq I am expecting in str reset messages */ 882 uint32_t str_reset_seq_in; 883 884 /* various verification tag information */ 885 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 886 * by remote end, and I have unlocked this 887 * will be regenerated to a new random value. */ 888 uint32_t peer_vtag; /* The peers last tag */ 889 890 uint32_t my_vtag_nonce; 891 uint32_t peer_vtag_nonce; 892 893 uint32_t assoc_id; 894 895 /* This is the SCTP fragmentation threshold */ 896 uint32_t smallest_mtu; 897 898 /* 899 * Special hook for Fast retransmit, allows us to track the highest 900 * TSN that is NEW in this SACK if gap ack blocks are present. 901 */ 902 uint32_t this_sack_highest_gap; 903 904 /* 905 * The highest consecutive TSN that has been acked by peer on my 906 * sends 907 */ 908 uint32_t last_acked_seq; 909 910 /* The next TSN that I will use in sending. */ 911 uint32_t sending_seq; 912 913 /* Original seq number I used ??questionable to keep?? */ 914 uint32_t init_seq_number; 915 916 917 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 918 /* (A1 in Section 4.2) */ 919 uint32_t advanced_peer_ack_point; 920 921 /* 922 * The highest consequetive TSN at the bottom of the mapping array 923 * (for his sends). 924 */ 925 uint32_t cumulative_tsn; 926 /* 927 * Used to track the mapping array and its offset bits. This MAY be 928 * lower then cumulative_tsn. 929 */ 930 uint32_t mapping_array_base_tsn; 931 /* 932 * used to track highest TSN we have received and is listed in the 933 * mapping array. 934 */ 935 uint32_t highest_tsn_inside_map; 936 937 /* EY - new NR variables used for nr_sack based on mapping_array */ 938 uint8_t *nr_mapping_array; 939 uint32_t highest_tsn_inside_nr_map; 940 941 uint32_t fast_recovery_tsn; 942 uint32_t sat_t3_recovery_tsn; 943 uint32_t tsn_last_delivered; 944 /* 945 * For the pd-api we should re-write this a bit more efficent. We 946 * could have multiple sctp_queued_to_read's that we are building at 947 * once. Now we only do this when we get ready to deliver to the 948 * socket buffer. Note that we depend on the fact that the struct is 949 * "stuck" on the read queue until we finish all the pd-api. 950 */ 951 struct sctp_queued_to_read *control_pdapi; 952 953 uint32_t tsn_of_pdapi_last_delivered; 954 uint32_t pdapi_ppid; 955 uint32_t context; 956 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 957 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 958 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 959 #ifdef SCTP_ASOCLOG_OF_TSNS 960 /* 961 * special log - This adds considerable size to the asoc, but 962 * provides a log that you can use to detect problems via kgdb. 963 */ 964 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE]; 965 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE]; 966 uint32_t cumack_log[SCTP_TSN_LOG_SIZE]; 967 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE]; 968 uint16_t tsn_in_at; 969 uint16_t tsn_out_at; 970 uint16_t tsn_in_wrapped; 971 uint16_t tsn_out_wrapped; 972 uint16_t cumack_log_at; 973 uint16_t cumack_log_atsnt; 974 #endif /* SCTP_ASOCLOG_OF_TSNS */ 975 #ifdef SCTP_FS_SPEC_LOG 976 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE]; 977 uint16_t fs_index; 978 #endif 979 980 /* 981 * window state information and smallest MTU that I use to bound 982 * segmentation 983 */ 984 uint32_t peers_rwnd; 985 uint32_t my_rwnd; 986 uint32_t my_last_reported_rwnd; 987 uint32_t sctp_frag_point; 988 989 uint32_t total_output_queue_size; 990 991 uint32_t sb_cc; /* shadow of sb_cc */ 992 uint32_t sb_send_resv; /* amount reserved on a send */ 993 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd 994 * control */ 995 #ifdef INET6 996 uint32_t default_flowlabel; 997 #endif 998 uint32_t pr_sctp_cnt; 999 int ctrl_queue_cnt; /* could be removed REM - NO IT CAN'T!! RRS */ 1000 /* 1001 * All outbound datagrams queue into this list from the individual 1002 * stream queue. Here they get assigned a TSN and then await 1003 * sending. The stream seq comes when it is first put in the 1004 * individual str queue 1005 */ 1006 unsigned int stream_queue_cnt; 1007 unsigned int send_queue_cnt; 1008 unsigned int sent_queue_cnt; 1009 unsigned int sent_queue_cnt_removeable; 1010 /* 1011 * Number on sent queue that are marked for retran until this value 1012 * is 0 we only send one packet of retran'ed data. 1013 */ 1014 unsigned int sent_queue_retran_cnt; 1015 1016 unsigned int size_on_reasm_queue; 1017 unsigned int cnt_on_reasm_queue; 1018 unsigned int fwd_tsn_cnt; 1019 /* amount of data (bytes) currently in flight (on all destinations) */ 1020 unsigned int total_flight; 1021 /* Total book size in flight */ 1022 unsigned int total_flight_count; /* count of chunks used with 1023 * book total */ 1024 /* count of destinaton nets and list of destination nets */ 1025 unsigned int numnets; 1026 1027 /* Total error count on this association */ 1028 unsigned int overall_error_count; 1029 1030 unsigned int cnt_msg_on_sb; 1031 1032 /* All stream count of chunks for delivery */ 1033 unsigned int size_on_all_streams; 1034 unsigned int cnt_on_all_streams; 1035 1036 /* Heart Beat delay in ms */ 1037 uint32_t heart_beat_delay; 1038 1039 /* autoclose */ 1040 unsigned int sctp_autoclose_ticks; 1041 1042 /* how many preopen streams we have */ 1043 unsigned int pre_open_streams; 1044 1045 /* How many streams I support coming into me */ 1046 unsigned int max_inbound_streams; 1047 1048 /* the cookie life I award for any cookie, in seconds */ 1049 unsigned int cookie_life; 1050 /* time to delay acks for */ 1051 unsigned int delayed_ack; 1052 unsigned int old_delayed_ack; 1053 unsigned int sack_freq; 1054 unsigned int data_pkts_seen; 1055 1056 unsigned int numduptsns; 1057 int dup_tsns[SCTP_MAX_DUP_TSNS]; 1058 unsigned int initial_init_rto_max; /* initial RTO for INIT's */ 1059 unsigned int initial_rto; /* initial send RTO */ 1060 unsigned int minrto; /* per assoc RTO-MIN */ 1061 unsigned int maxrto; /* per assoc RTO-MAX */ 1062 1063 /* authentication fields */ 1064 sctp_auth_chklist_t *local_auth_chunks; 1065 sctp_auth_chklist_t *peer_auth_chunks; 1066 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 1067 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 1068 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 1069 sctp_authinfo_t authinfo; /* randoms, cached keys */ 1070 /* 1071 * refcnt to block freeing when a sender or receiver is off coping 1072 * user data in. 1073 */ 1074 uint32_t refcnt; 1075 uint32_t chunks_on_out_queue; /* total chunks floating around, 1076 * locked by send socket buffer */ 1077 uint32_t peers_adaptation; 1078 uint16_t peer_hmac_id; /* peer HMAC id to send */ 1079 1080 /* 1081 * Being that we have no bag to collect stale cookies, and that we 1082 * really would not want to anyway.. we will count them in this 1083 * counter. We of course feed them to the pigeons right away (I have 1084 * always thought of pigeons as flying rats). 1085 */ 1086 uint16_t stale_cookie_count; 1087 1088 /* 1089 * For the partial delivery API, if up, invoked this is what last 1090 * TSN I delivered 1091 */ 1092 uint16_t str_of_pdapi; 1093 uint16_t ssn_of_pdapi; 1094 1095 /* counts of actual built streams. Allocation may be more however */ 1096 /* could re-arrange to optimize space here. */ 1097 uint16_t streamincnt; 1098 uint16_t streamoutcnt; 1099 uint16_t strm_realoutsize; 1100 uint16_t strm_pending_add_size; 1101 /* my maximum number of retrans of INIT and SEND */ 1102 /* copied from SCTP but should be individually setable */ 1103 uint16_t max_init_times; 1104 uint16_t max_send_times; 1105 1106 uint16_t def_net_failure; 1107 1108 uint16_t def_net_pf_threshold; 1109 1110 /* 1111 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 1112 * awaiting ACK 1113 */ 1114 uint16_t mapping_array_size; 1115 1116 uint16_t last_strm_seq_delivered; 1117 uint16_t last_strm_no_delivered; 1118 1119 uint16_t last_revoke_count; 1120 int16_t num_send_timers_up; 1121 1122 uint16_t stream_locked_on; 1123 uint16_t ecn_echo_cnt_onq; 1124 1125 uint16_t free_chunk_cnt; 1126 uint8_t stream_locked; 1127 uint8_t authenticated; /* packet authenticated ok */ 1128 /* 1129 * This flag indicates that a SACK need to be sent. Initially this 1130 * is 1 to send the first sACK immediately. 1131 */ 1132 uint8_t send_sack; 1133 1134 /* max burst of new packets into the network */ 1135 uint32_t max_burst; 1136 /* max burst of fast retransmit packets */ 1137 uint32_t fr_max_burst; 1138 1139 uint8_t sat_network; /* RTT is in range of sat net or greater */ 1140 uint8_t sat_network_lockout; /* lockout code */ 1141 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 1142 /* flag goes on when we are doing a partial delivery api */ 1143 uint8_t hb_random_values[4]; 1144 uint8_t fragmented_delivery_inprogress; 1145 uint8_t fragment_flags; 1146 uint8_t last_flags_delivered; 1147 uint8_t hb_ect_randombit; 1148 uint8_t hb_random_idx; 1149 uint8_t default_dscp; 1150 uint8_t asconf_del_pending; /* asconf delete last addr pending */ 1151 1152 /* 1153 * This value, plus all other ack'd but above cum-ack is added 1154 * together to cross check against the bit that we have yet to 1155 * define (probably in the SACK). When the cum-ack is updated, this 1156 * sum is updated as well. 1157 */ 1158 1159 /* Flags whether an extension is supported or not */ 1160 uint8_t ecn_supported; 1161 uint8_t prsctp_supported; 1162 uint8_t auth_supported; 1163 uint8_t asconf_supported; 1164 uint8_t reconfig_supported; 1165 uint8_t nrsack_supported; 1166 uint8_t pktdrop_supported; 1167 1168 /* Did the peer make the stream config (add out) request */ 1169 uint8_t peer_req_out; 1170 1171 uint8_t local_strreset_support; 1172 1173 uint8_t peer_supports_nat; 1174 1175 struct sctp_scoping scope; 1176 /* flags to handle send alternate net tracking */ 1177 uint8_t used_alt_onsack; 1178 uint8_t used_alt_asconfack; 1179 uint8_t fast_retran_loss_recovery; 1180 uint8_t sat_t3_loss_recovery; 1181 uint8_t dropped_special_cnt; 1182 uint8_t seen_a_sack_this_pkt; 1183 uint8_t stream_reset_outstanding; 1184 uint8_t stream_reset_out_is_outstanding; 1185 uint8_t delayed_connection; 1186 uint8_t ifp_had_enobuf; 1187 uint8_t saw_sack_with_frags; 1188 uint8_t saw_sack_with_nr_frags; 1189 uint8_t in_asocid_hash; 1190 uint8_t assoc_up_sent; 1191 uint8_t adaptation_needed; 1192 uint8_t adaptation_sent; 1193 /* CMT variables */ 1194 uint8_t cmt_dac_pkts_rcvd; 1195 uint8_t sctp_cmt_on_off; 1196 uint8_t iam_blocking; 1197 uint8_t cookie_how[8]; 1198 /* JRS 5/21/07 - CMT PF variable */ 1199 uint8_t sctp_cmt_pf; 1200 uint8_t use_precise_time; 1201 uint64_t sctp_features; 1202 uint16_t port; /* remote UDP encapsulation port */ 1203 /* 1204 * The mapping array is used to track out of order sequences above 1205 * last_acked_seq. 0 indicates packet missing 1 indicates packet 1206 * rec'd. We slide it up every time we raise last_acked_seq and 0 1207 * trailing locactions out. If I get a TSN above the array 1208 * mappingArraySz, I discard the datagram and let retransmit happen. 1209 */ 1210 uint32_t marked_retrans; 1211 uint32_t timoinit; 1212 uint32_t timodata; 1213 uint32_t timosack; 1214 uint32_t timoshutdown; 1215 uint32_t timoheartbeat; 1216 uint32_t timocookie; 1217 uint32_t timoshutdownack; 1218 struct timeval start_time; 1219 struct timeval discontinuity_time; 1220 uint64_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 1221 uint64_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 1222 }; 1223 1224 #endif 1225