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