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