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 #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 struct sctp_foo_stuff { 63 struct sctp_inpcb *inp; 64 uint32_t lineno; 65 uint32_t ticks; 66 int updown; 67 }; 68 69 /* 70 * This is the information we track on each interface that we know about from 71 * the distant end. 72 */ 73 TAILQ_HEAD(sctpnetlisthead, sctp_nets); 74 75 struct sctp_stream_reset_list { 76 TAILQ_ENTRY(sctp_stream_reset_list) next_resp; 77 uint32_t seq; 78 uint32_t tsn; 79 uint32_t number_entries; 80 uint16_t list_of_streams[]; 81 }; 82 83 TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list); 84 85 /* 86 * Users of the iterator need to malloc a iterator with a call to 87 * sctp_initiate_iterator(inp_func, assoc_func, inp_func, pcb_flags, pcb_features, 88 * asoc_state, void-ptr-arg, uint32-arg, end_func, inp); 89 * 90 * Use the following two defines if you don't care what pcb flags are on the EP 91 * and/or you don't care what state the association is in. 92 * 93 * Note that if you specify an INP as the last argument then ONLY each 94 * association of that single INP will be executed upon. Note that the pcb 95 * flags STILL apply so if the inp you specify has different pcb_flags then 96 * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to 97 * assure the inp you specify gets treated. 98 */ 99 #define SCTP_PCB_ANY_FLAGS 0x00000000 100 #define SCTP_PCB_ANY_FEATURES 0x00000000 101 #define SCTP_ASOC_ANY_STATE 0x00000000 102 103 typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr, 104 uint32_t val); 105 typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val); 106 typedef void (*end_func) (void *ptr, uint32_t val); 107 108 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 109 /* whats on the mcore control struct */ 110 struct sctp_mcore_queue { 111 TAILQ_ENTRY(sctp_mcore_queue) next; 112 struct vnet *vn; 113 struct mbuf *m; 114 int off; 115 int v6; 116 }; 117 118 TAILQ_HEAD(sctp_mcore_qhead, sctp_mcore_queue); 119 120 struct sctp_mcore_ctrl { 121 SCTP_PROCESS_STRUCT thread_proc; 122 struct sctp_mcore_qhead que; 123 struct mtx core_mtx; 124 struct mtx que_mtx; 125 int running; 126 int cpuid; 127 }; 128 #endif 129 130 /* This struct is here to cut out the compatiabilty 131 * pad that bulks up both the inp and stcb. The non 132 * pad portion MUST stay in complete sync with 133 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added 134 * this must be done here too. 135 */ 136 struct sctp_nonpad_sndrcvinfo { 137 uint16_t sinfo_stream; 138 uint16_t sinfo_ssn; 139 uint16_t sinfo_flags; 140 uint32_t sinfo_ppid; 141 uint32_t sinfo_context; 142 uint32_t sinfo_timetolive; 143 uint32_t sinfo_tsn; 144 uint32_t sinfo_cumtsn; 145 sctp_assoc_t sinfo_assoc_id; 146 uint16_t sinfo_keynumber; 147 uint16_t sinfo_keynumber_valid; 148 }; 149 150 struct sctp_iterator { 151 TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr; 152 struct vnet *vn; 153 struct sctp_timer tmr; 154 struct sctp_inpcb *inp; /* current endpoint */ 155 struct sctp_tcb *stcb; /* current* assoc */ 156 struct sctp_inpcb *next_inp; /* special hook to skip to */ 157 asoc_func function_assoc; /* per assoc function */ 158 inp_func function_inp; /* per endpoint function */ 159 inp_func function_inp_end; /* end INP function */ 160 end_func function_atend; /* iterator completion function */ 161 void *pointer; /* pointer for apply func to use */ 162 uint32_t val; /* value for apply func to use */ 163 uint32_t pcb_flags; /* endpoint flags being checked */ 164 uint32_t pcb_features; /* endpoint features being checked */ 165 uint32_t asoc_state; /* assoc state being checked */ 166 uint32_t iterator_flags; 167 uint8_t no_chunk_output; 168 uint8_t done_current_ep; 169 }; 170 171 /* iterator_flags values */ 172 #define SCTP_ITERATOR_DO_ALL_INP 0x00000001 173 #define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002 174 175 TAILQ_HEAD(sctpiterators, sctp_iterator); 176 177 struct sctp_copy_all { 178 struct sctp_inpcb *inp; /* ep */ 179 struct mbuf *m; 180 struct sctp_nonpad_sndrcvinfo sndrcv; 181 ssize_t sndlen; 182 int cnt_sent; 183 int cnt_failed; 184 }; 185 186 struct sctp_asconf_iterator { 187 struct sctpladdr list_of_work; 188 int cnt; 189 }; 190 191 struct iterator_control { 192 struct mtx ipi_iterator_wq_mtx; 193 struct mtx it_mtx; 194 SCTP_PROCESS_STRUCT thread_proc; 195 struct sctpiterators iteratorhead; 196 struct sctp_iterator *cur_it; 197 uint32_t iterator_running; 198 uint32_t iterator_flags; 199 }; 200 #define SCTP_ITERATOR_STOP_CUR_IT 0x00000004 201 #define SCTP_ITERATOR_STOP_CUR_INP 0x00000008 202 203 struct sctp_net_route { 204 struct nhop_object *ro_nh; 205 struct llentry *ro_lle; 206 char *ro_prepend; 207 uint16_t ro_plen; 208 uint16_t ro_flags; 209 uint16_t ro_mtu; 210 uint16_t spare; 211 union sctp_sockstore _l_addr; /* remote peer addr */ 212 struct sctp_ifa *_s_addr; /* our selected src addr */ 213 }; 214 215 struct htcp { 216 uint16_t alpha; /* Fixed point arith, << 7 */ 217 uint8_t beta; /* Fixed point arith, << 7 */ 218 uint8_t modeswitch; /* Delay modeswitch until we had at least one 219 * congestion event */ 220 uint32_t last_cong; /* Time since last congestion event end */ 221 uint32_t undo_last_cong; 222 uint16_t bytes_acked; 223 uint32_t bytecount; 224 uint32_t minRTT; 225 uint32_t maxRTT; 226 227 uint32_t undo_maxRTT; 228 uint32_t undo_old_maxB; 229 230 /* Bandwidth estimation */ 231 uint32_t minB; 232 uint32_t maxB; 233 uint32_t old_maxB; 234 uint32_t Bi; 235 uint32_t lasttime; 236 }; 237 238 struct rtcc_cc { 239 struct timeval tls; /* The time we started the sending */ 240 uint64_t lbw; /* Our last estimated bw */ 241 uint64_t lbw_rtt; /* RTT at bw estimate */ 242 uint64_t bw_bytes; /* The total bytes since this sending began */ 243 uint64_t bw_tot_time; /* The total time since sending began */ 244 uint64_t new_tot_time; /* temp holding the new value */ 245 uint64_t bw_bytes_at_last_rttc; /* What bw_bytes was at last rtt calc */ 246 uint32_t cwnd_at_bw_set; /* Cwnd at last bw saved - lbw */ 247 uint32_t vol_reduce; /* cnt of voluntary reductions */ 248 uint16_t steady_step; /* The number required to be in steady state */ 249 uint16_t step_cnt; /* The current number */ 250 uint8_t ret_from_eq; /* When all things are equal what do I return 251 * 0/1 - 1 no cc advance */ 252 uint8_t use_dccc_ecn; /* Flag to enable DCCC ECN */ 253 uint8_t tls_needs_set; /* Flag to indicate we need to set tls 0 or 1 254 * means set at send 2 not */ 255 uint8_t last_step_state; /* Last state if steady state stepdown 256 * is on */ 257 uint8_t rtt_set_this_sack; /* Flag saying this sack had RTT calc 258 * on it */ 259 uint8_t last_inst_ind; /* Last saved inst indication */ 260 }; 261 262 struct sctp_nets { 263 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */ 264 265 /* 266 * Things on the top half may be able to be split into a common 267 * structure shared by all. 268 */ 269 struct sctp_timer pmtu_timer; 270 struct sctp_timer hb_timer; 271 272 /* 273 * The following two in combination equate to a route entry for v6 274 * or v4. 275 */ 276 struct sctp_net_route ro; 277 278 /* mtu discovered so far */ 279 uint32_t mtu; 280 uint32_t ssthresh; /* not sure about this one for split */ 281 uint32_t last_cwr_tsn; 282 uint32_t cwr_window_tsn; 283 uint32_t ecn_ce_pkt_cnt; 284 uint32_t lost_cnt; 285 /* smoothed average things for RTT and RTO itself */ 286 int lastsa; 287 int lastsv; 288 uint64_t rtt; /* last measured rtt value in us */ 289 uint32_t RTO; 290 291 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */ 292 struct sctp_timer rxt_timer; 293 294 /* last time in seconds I sent to it */ 295 struct timeval last_sent_time; 296 union cc_control_data { 297 struct htcp htcp_ca; /* JRS - struct used in HTCP algorithm */ 298 struct rtcc_cc rtcc; /* rtcc module cc stuff */ 299 } cc_mod; 300 int ref_count; 301 302 /* Congestion stats per destination */ 303 /* 304 * flight size variables and such, sorry Vern, I could not avoid 305 * this if I wanted performance :> 306 */ 307 uint32_t flight_size; 308 uint32_t cwnd; /* actual cwnd */ 309 uint32_t prev_cwnd; /* cwnd before any processing */ 310 uint32_t ecn_prev_cwnd; /* ECN prev cwnd at first ecn_echo seen in new 311 * window */ 312 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */ 313 /* tracking variables to avoid the aloc/free in sack processing */ 314 unsigned int net_ack; 315 unsigned int net_ack2; 316 317 /* 318 * JRS - 5/8/07 - Variable to track last time a destination was 319 * active for CMT PF 320 */ 321 uint32_t last_active; 322 323 /* 324 * CMT variables (iyengar@cis.udel.edu) 325 */ 326 uint32_t this_sack_highest_newack; /* tracks highest TSN newly 327 * acked for a given dest in 328 * the current SACK. Used in 329 * SFR and HTNA algos */ 330 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected 331 * pseudo-cumack for this destination */ 332 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next 333 * expected pseudo-cumack for this 334 * destination */ 335 336 /* CMT fast recovery variables */ 337 uint32_t fast_recovery_tsn; 338 uint32_t heartbeat_random1; 339 uint32_t heartbeat_random2; 340 #ifdef INET6 341 uint32_t flowlabel; 342 #endif 343 uint8_t dscp; 344 345 struct timeval start_time; /* time when this net was created */ 346 uint32_t marked_retrans; /* number or DATA chunks marked for 347 * timer based retransmissions */ 348 uint32_t marked_fastretrans; 349 uint32_t heart_beat_delay; /* Heart Beat delay in ms */ 350 351 /* if this guy is ok or not ... status */ 352 uint16_t dest_state; 353 /* number of timeouts to consider the destination unreachable */ 354 uint16_t failure_threshold; 355 /* number of timeouts to consider the destination potentially failed */ 356 uint16_t pf_threshold; 357 /* error stats on the destination */ 358 uint16_t error_count; 359 /* UDP port number in case of UDP tunneling */ 360 uint16_t port; 361 362 uint8_t fast_retran_loss_recovery; 363 uint8_t will_exit_fast_recovery; 364 /* Flags that probably can be combined into dest_state */ 365 uint8_t fast_retran_ip; /* fast retransmit in progress */ 366 uint8_t hb_responded; 367 uint8_t saw_newack; /* CMT's SFR algorithm flag */ 368 uint8_t src_addr_selected; /* if we split we move */ 369 uint8_t indx_of_eligible_next_to_use; 370 uint8_t addr_is_local; /* its a local address (if known) could move 371 * in split */ 372 373 /* 374 * CMT variables (iyengar@cis.udel.edu) 375 */ 376 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to 377 * find a new pseudocumack. This flag 378 * is set after a new pseudo-cumack 379 * has been received and indicates 380 * that the sender should find the 381 * next pseudo-cumack expected for 382 * this destination */ 383 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to 384 * find a new rtx-pseudocumack. This 385 * flag is set after a new 386 * rtx-pseudo-cumack has been received 387 * and indicates that the sender 388 * should find the next 389 * rtx-pseudo-cumack expected for this 390 * destination */ 391 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to 392 * indicate if a new pseudo-cumack or 393 * rtx-pseudo-cumack has been received */ 394 uint8_t window_probe; /* Doing a window probe? */ 395 uint8_t RTO_measured; /* Have we done the first measure */ 396 uint8_t last_hs_used; /* index into the last HS table entry we used */ 397 uint8_t lan_type; 398 uint8_t rto_needed; 399 uint32_t flowid; 400 uint8_t flowtype; 401 }; 402 403 struct sctp_data_chunkrec { 404 uint32_t tsn; /* the TSN of this transmit */ 405 uint32_t mid; /* the message identifier of this transmit */ 406 uint16_t sid; /* the stream number of this guy */ 407 uint32_t ppid; 408 uint32_t context; /* from send */ 409 uint32_t cwnd_at_send; 410 /* 411 * part of the Highest sacked algorithm to be able to stroke counts 412 * on ones that are FR'd. 413 */ 414 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 415 struct timeval timetodrop; /* time we drop it from queue */ 416 uint32_t fsn; /* Fragment Sequence Number */ 417 uint8_t doing_fast_retransmit; 418 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 419 * outbound holds sending flags for PR-SCTP. */ 420 uint8_t state_flags; 421 uint8_t chunk_was_revoked; 422 uint8_t fwd_tsn_cnt; 423 }; 424 425 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 426 427 /* The lower byte is used to enumerate PR_SCTP policies */ 428 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 429 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 430 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 431 432 /* The upper byte is used as a bit mask */ 433 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100 434 435 struct chk_id { 436 uint8_t id; 437 uint8_t can_take_data; 438 }; 439 440 struct sctp_tmit_chunk { 441 union { 442 struct sctp_data_chunkrec data; 443 struct chk_id chunk_id; 444 } rec; 445 struct sctp_association *asoc; /* bp to asoc this belongs to */ 446 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 447 struct mbuf *data; /* pointer to mbuf chain of data */ 448 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 449 struct sctp_nets *whoTo; 450 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 451 int32_t sent; /* the send status */ 452 uint16_t snd_count; /* number of times I sent */ 453 uint16_t flags; /* flags, such as FRAGMENT_OK */ 454 uint16_t send_size; 455 uint16_t book_size; 456 uint16_t mbcnt; 457 uint16_t auth_keyid; 458 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */ 459 uint8_t pad_inplace; 460 uint8_t do_rtt; 461 uint8_t book_size_scale; 462 uint8_t no_fr_allowed; 463 uint8_t copy_by_ref; 464 uint8_t window_probe; 465 }; 466 467 struct sctp_queued_to_read { /* sinfo structure Pluse more */ 468 uint16_t sinfo_stream; /* off the wire */ 469 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for 470 * EOR */ 471 uint32_t sinfo_ppid; /* off the wire */ 472 uint32_t sinfo_context; /* pick this up from assoc def context? */ 473 uint32_t sinfo_timetolive; /* not used by kernel */ 474 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */ 475 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */ 476 sctp_assoc_t sinfo_assoc_id; /* our assoc id */ 477 /* Non sinfo stuff */ 478 uint32_t mid; /* Fragment Index */ 479 uint32_t length; /* length of data */ 480 uint32_t held_length; /* length held in sb */ 481 uint32_t top_fsn; /* Highest FSN in queue */ 482 uint32_t fsn_included; /* Highest FSN in *data portion */ 483 struct sctp_nets *whoFrom; /* where it came from */ 484 struct mbuf *data; /* front of the mbuf chain of data with 485 * PKT_HDR */ 486 struct mbuf *tail_mbuf; /* used for multi-part data */ 487 struct mbuf *aux_data; /* used to hold/cache control if o/s does not 488 * take it from us */ 489 struct sctp_tcb *stcb; /* assoc, used for window update */ 490 TAILQ_ENTRY(sctp_queued_to_read) next; 491 TAILQ_ENTRY(sctp_queued_to_read) next_instrm; 492 struct sctpchunk_listhead reasm; 493 uint16_t port_from; 494 uint16_t spec_flags; /* Flags to hold the notification field */ 495 uint8_t do_not_ref_stcb; 496 uint8_t end_added; 497 uint8_t pdapi_aborted; 498 uint8_t pdapi_started; 499 uint8_t some_taken; 500 uint8_t last_frag_seen; 501 uint8_t first_frag_seen; 502 uint8_t on_read_q; 503 uint8_t on_strm_q; 504 }; 505 506 #define SCTP_ON_ORDERED 1 507 #define SCTP_ON_UNORDERED 2 508 509 /* This data structure will be on the outbound 510 * stream queues. Data will be pulled off from 511 * the front of the mbuf data and chunk-ified 512 * by the output routines. We will custom 513 * fit every chunk we pull to the send/sent 514 * queue to make up the next full packet 515 * if we can. An entry cannot be removed 516 * from the stream_out queue until 517 * the msg_is_complete flag is set. This 518 * means at times data/tail_mbuf MIGHT 519 * be NULL.. If that occurs it happens 520 * for one of two reasons. Either the user 521 * is blocked on a send() call and has not 522 * awoken to copy more data down... OR 523 * the user is in the explict MSG_EOR mode 524 * and wrote some data, but has not completed 525 * sending. 526 * ss_next and scheduled are only used by the FCFS stream scheduler. 527 */ 528 struct sctp_stream_queue_pending { 529 struct mbuf *data; 530 struct mbuf *tail_mbuf; 531 struct timeval ts; 532 struct sctp_nets *net; 533 TAILQ_ENTRY(sctp_stream_queue_pending) next; 534 TAILQ_ENTRY(sctp_stream_queue_pending) ss_next; 535 uint32_t fsn; 536 uint32_t length; 537 uint32_t timetolive; 538 uint32_t ppid; 539 uint32_t context; 540 uint16_t sinfo_flags; 541 uint16_t sid; 542 uint16_t act_flags; 543 uint16_t auth_keyid; 544 uint8_t holds_key_ref; 545 uint8_t msg_is_complete; 546 uint8_t some_taken; 547 uint8_t sender_all_done; 548 uint8_t put_last_out; 549 uint8_t discard_rest; 550 uint8_t processing; 551 bool scheduled; 552 }; 553 554 /* 555 * this struct contains info that is used to track inbound stream data and 556 * help with ordering. 557 */ 558 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 559 struct sctp_stream_in { 560 struct sctp_readhead inqueue; 561 struct sctp_readhead uno_inqueue; 562 uint32_t last_mid_delivered; /* used for re-order */ 563 uint16_t sid; 564 uint8_t delivery_started; 565 uint8_t pd_api_started; 566 }; 567 568 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 569 TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending); 570 571 /* 572 * This union holds all data necessary for 573 * different stream schedulers. 574 */ 575 struct scheduling_data { 576 struct sctp_stream_out *locked_on_sending; 577 /* circular looking for output selection */ 578 struct sctp_stream_out *last_out_stream; 579 union { 580 struct sctpwheel_listhead wheel; 581 struct sctplist_listhead list; 582 } out; 583 }; 584 585 /* Round-robin schedulers */ 586 struct ss_rr { 587 /* next link in wheel */ 588 TAILQ_ENTRY(sctp_stream_out) next_spoke; 589 }; 590 591 /* Priority scheduler */ 592 struct ss_prio { 593 /* next link in wheel */ 594 TAILQ_ENTRY(sctp_stream_out) next_spoke; 595 /* priority id */ 596 uint16_t priority; 597 }; 598 599 /* Fair Bandwidth scheduler */ 600 struct ss_fb { 601 /* next link in wheel */ 602 TAILQ_ENTRY(sctp_stream_out) next_spoke; 603 /* stores message size */ 604 int32_t rounds; 605 }; 606 607 /* 608 * This union holds all parameters per stream 609 * necessary for different stream schedulers. 610 */ 611 struct scheduling_parameters { 612 union { 613 struct ss_rr rr; 614 struct ss_prio prio; 615 struct ss_fb fb; 616 } ss; 617 bool scheduled; 618 }; 619 620 /* States for outgoing streams */ 621 #define SCTP_STREAM_CLOSED 0x00 622 #define SCTP_STREAM_OPENING 0x01 623 #define SCTP_STREAM_OPEN 0x02 624 #define SCTP_STREAM_RESET_PENDING 0x03 625 #define SCTP_STREAM_RESET_IN_FLIGHT 0x04 626 627 /* This struct is used to track the traffic on outbound streams */ 628 struct sctp_stream_out { 629 struct sctp_streamhead outqueue; 630 struct scheduling_parameters ss_params; 631 uint32_t chunks_on_queues; /* send queue and sent queue */ 632 #if defined(SCTP_DETAILED_STR_STATS) 633 uint32_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 634 uint32_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 635 #else 636 /* Only the aggregation */ 637 uint32_t abandoned_unsent[1]; 638 uint32_t abandoned_sent[1]; 639 #endif 640 /* 641 * For associations using DATA chunks, the lower 16-bit of 642 * next_mid_ordered are used as the next SSN. 643 */ 644 uint32_t next_mid_ordered; 645 uint32_t next_mid_unordered; 646 uint16_t sid; 647 uint8_t last_msg_incomplete; 648 uint8_t state; 649 }; 650 651 #define SCTP_MAX_STREAMS_AT_ONCE_RESET 200 652 653 /* used to keep track of the addresses yet to try to add/delete */ 654 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 655 struct sctp_asconf_addr { 656 TAILQ_ENTRY(sctp_asconf_addr) next; 657 struct sctp_asconf_addr_param ap; 658 struct sctp_ifa *ifa; /* save the ifa for add/del ip */ 659 uint8_t sent; /* has this been sent yet? */ 660 uint8_t special_del; /* not to be used in lookup */ 661 }; 662 663 struct sctp_scoping { 664 uint8_t ipv4_addr_legal; 665 uint8_t ipv6_addr_legal; 666 uint8_t loopback_scope; 667 uint8_t ipv4_local_scope; 668 uint8_t local_scope; 669 uint8_t site_scope; 670 }; 671 672 #define SCTP_TSN_LOG_SIZE 40 673 674 struct sctp_tsn_log { 675 void *stcb; 676 uint32_t tsn; 677 uint32_t seq; 678 uint16_t strm; 679 uint16_t sz; 680 uint16_t flgs; 681 uint16_t in_pos; 682 uint16_t in_out; 683 uint16_t resv; 684 }; 685 686 #define SCTP_FS_SPEC_LOG_SIZE 200 687 struct sctp_fs_spec_log { 688 uint32_t sent; 689 uint32_t total_flight; 690 uint32_t tsn; 691 uint16_t book; 692 uint8_t incr; 693 uint8_t decr; 694 }; 695 696 /* 697 * JRS - Structure to hold function pointers to the functions responsible 698 * for congestion control. 699 */ 700 701 struct sctp_cc_functions { 702 void (*sctp_set_initial_cc_param) (struct sctp_tcb *stcb, struct sctp_nets *net); 703 void (*sctp_cwnd_update_after_sack) (struct sctp_tcb *stcb, 704 struct sctp_association *asoc, 705 int accum_moved, int reneged_all, int will_exit); 706 void (*sctp_cwnd_update_exit_pf) (struct sctp_tcb *stcb, struct sctp_nets *net); 707 void (*sctp_cwnd_update_after_fr) (struct sctp_tcb *stcb, 708 struct sctp_association *asoc); 709 void (*sctp_cwnd_update_after_timeout) (struct sctp_tcb *stcb, 710 struct sctp_nets *net); 711 void (*sctp_cwnd_update_after_ecn_echo) (struct sctp_tcb *stcb, 712 struct sctp_nets *net, int in_window, int num_pkt_lost); 713 void (*sctp_cwnd_update_after_packet_dropped) (struct sctp_tcb *stcb, 714 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp, 715 uint32_t *bottle_bw, uint32_t *on_queue); 716 void (*sctp_cwnd_update_after_output) (struct sctp_tcb *stcb, 717 struct sctp_nets *net, int burst_limit); 718 void (*sctp_cwnd_update_packet_transmitted) (struct sctp_tcb *stcb, 719 struct sctp_nets *net); 720 void (*sctp_cwnd_update_tsn_acknowledged) (struct sctp_nets *net, 721 struct sctp_tmit_chunk *); 722 void (*sctp_cwnd_new_transmission_begins) (struct sctp_tcb *stcb, 723 struct sctp_nets *net); 724 void (*sctp_cwnd_prepare_net_for_sack) (struct sctp_tcb *stcb, 725 struct sctp_nets *net); 726 int (*sctp_cwnd_socket_option) (struct sctp_tcb *stcb, int set, struct sctp_cc_option *); 727 void (*sctp_rtt_calculated) (struct sctp_tcb *, struct sctp_nets *, struct timeval *); 728 }; 729 730 /* 731 * RS - Structure to hold function pointers to the functions responsible 732 * for stream scheduling. 733 */ 734 struct sctp_ss_functions { 735 void (*sctp_ss_init) (struct sctp_tcb *stcb, struct sctp_association *asoc); 736 void (*sctp_ss_clear) (struct sctp_tcb *stcb, struct sctp_association *asoc, 737 bool clear_values); 738 void (*sctp_ss_init_stream) (struct sctp_tcb *stcb, struct sctp_stream_out *strq, struct sctp_stream_out *with_strq); 739 void (*sctp_ss_add_to_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 740 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp); 741 bool (*sctp_ss_is_empty) (struct sctp_tcb *stcb, struct sctp_association *asoc); 742 void (*sctp_ss_remove_from_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 743 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp); 744 struct sctp_stream_out *(*sctp_ss_select_stream) (struct sctp_tcb *stcb, 745 struct sctp_nets *net, struct sctp_association *asoc); 746 void (*sctp_ss_scheduled) (struct sctp_tcb *stcb, struct sctp_nets *net, 747 struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much); 748 void (*sctp_ss_packet_done) (struct sctp_tcb *stcb, struct sctp_nets *net, 749 struct sctp_association *asoc); 750 int (*sctp_ss_get_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 751 struct sctp_stream_out *strq, uint16_t *value); 752 int (*sctp_ss_set_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 753 struct sctp_stream_out *strq, uint16_t value); 754 bool (*sctp_ss_is_user_msgs_incomplete) (struct sctp_tcb *stcb, struct sctp_association *asoc); 755 }; 756 757 /* used to save ASCONF chunks for retransmission */ 758 TAILQ_HEAD(sctp_asconf_head, sctp_asconf); 759 struct sctp_asconf { 760 TAILQ_ENTRY(sctp_asconf) next; 761 uint32_t serial_number; 762 uint16_t snd_count; 763 struct mbuf *data; 764 uint16_t len; 765 }; 766 767 /* used to save ASCONF-ACK chunks for retransmission */ 768 TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack); 769 struct sctp_asconf_ack { 770 TAILQ_ENTRY(sctp_asconf_ack) next; 771 uint32_t serial_number; 772 struct sctp_nets *last_sent_to; 773 struct mbuf *data; 774 uint16_t len; 775 }; 776 777 /* 778 * Here we have information about each individual association that we track. 779 * We probably in production would be more dynamic. But for ease of 780 * implementation we will have a fixed array that we hunt for in a linear 781 * fashion. 782 */ 783 struct sctp_association { 784 /* association state */ 785 int state; 786 787 /* queue of pending addrs to add/delete */ 788 struct sctp_asconf_addrhead asconf_queue; 789 790 struct timeval time_entered; /* time we entered state */ 791 struct timeval time_last_rcvd; 792 struct timeval time_last_sent; 793 struct timeval time_last_sat_advance; 794 struct sctp_nonpad_sndrcvinfo def_send; 795 796 /* timers and such */ 797 struct sctp_timer dack_timer; /* Delayed ack timer */ 798 struct sctp_timer asconf_timer; /* asconf */ 799 struct sctp_timer strreset_timer; /* stream reset */ 800 struct sctp_timer shut_guard_timer; /* shutdown guard */ 801 struct sctp_timer autoclose_timer; /* automatic close timer */ 802 struct sctp_timer delete_prim_timer; /* deleting primary dst */ 803 804 /* list of restricted local addresses */ 805 struct sctpladdr sctp_restricted_addrs; 806 807 /* last local address pending deletion (waiting for an address add) */ 808 struct sctp_ifa *asconf_addr_del_pending; 809 /* Deleted primary destination (used to stop timer) */ 810 struct sctp_nets *deleted_primary; 811 812 struct sctpnetlisthead nets; /* remote address list */ 813 814 /* Free chunk list */ 815 struct sctpchunk_listhead free_chunks; 816 817 /* Control chunk queue */ 818 struct sctpchunk_listhead control_send_queue; 819 820 /* ASCONF chunk queue */ 821 struct sctpchunk_listhead asconf_send_queue; 822 823 /* 824 * Once a TSN hits the wire it is moved to the sent_queue. We 825 * maintain two counts here (don't know if any but retran_cnt is 826 * needed). The idea is that the sent_queue_retran_cnt reflects how 827 * many chunks have been marked for retranmission by either T3-rxt 828 * or FR. 829 */ 830 struct sctpchunk_listhead sent_queue; 831 struct sctpchunk_listhead send_queue; 832 833 /* Scheduling queues */ 834 struct scheduling_data ss_data; 835 836 /* If an iterator is looking at me, this is it */ 837 struct sctp_iterator *stcb_starting_point_for_iterator; 838 839 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 840 struct sctp_asconf_ackhead asconf_ack_sent; 841 842 /* 843 * pointer to last stream reset queued to control queue by us with 844 * requests. 845 */ 846 struct sctp_tmit_chunk *str_reset; 847 /* 848 * if Source Address Selection happening, this will rotate through 849 * the link list. 850 */ 851 struct sctp_laddr *last_used_address; 852 853 /* stream arrays */ 854 struct sctp_stream_in *strmin; 855 struct sctp_stream_out *strmout; 856 uint8_t *mapping_array; 857 /* primary destination to use */ 858 struct sctp_nets *primary_destination; 859 struct sctp_nets *alternate; /* If primary is down or PF */ 860 /* For CMT */ 861 struct sctp_nets *last_net_cmt_send_started; 862 /* last place I got a data chunk from */ 863 struct sctp_nets *last_data_chunk_from; 864 /* last place I got a control from */ 865 struct sctp_nets *last_control_chunk_from; 866 867 /* 868 * wait to the point the cum-ack passes req->send_reset_at_tsn for 869 * any req on the list. 870 */ 871 struct sctp_resethead resetHead; 872 873 /* queue of chunks waiting to be sent into the local stack */ 874 struct sctp_readhead pending_reply_queue; 875 876 /* JRS - the congestion control functions are in this struct */ 877 struct sctp_cc_functions cc_functions; 878 /* 879 * JRS - value to store the currently loaded congestion control 880 * module 881 */ 882 uint32_t congestion_control_module; 883 /* RS - the stream scheduling functions are in this struct */ 884 struct sctp_ss_functions ss_functions; 885 /* RS - value to store the currently loaded stream scheduling module */ 886 uint32_t stream_scheduling_module; 887 888 uint32_t vrf_id; 889 uint32_t cookie_preserve_req; 890 /* ASCONF next seq I am sending out, inits at init-tsn */ 891 uint32_t asconf_seq_out; 892 uint32_t asconf_seq_out_acked; 893 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 894 uint32_t asconf_seq_in; 895 896 /* next seq I am sending in str reset messages */ 897 uint32_t str_reset_seq_out; 898 /* next seq I am expecting in str reset messages */ 899 uint32_t str_reset_seq_in; 900 901 /* various verification tag information */ 902 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 903 * by remote end, and I have unlocked this 904 * will be regenerated to a new random value. */ 905 uint32_t peer_vtag; /* The peers last tag */ 906 907 uint32_t my_vtag_nonce; 908 uint32_t peer_vtag_nonce; 909 910 uint32_t assoc_id; 911 912 /* This is the SCTP fragmentation threshold */ 913 uint32_t smallest_mtu; 914 915 /* 916 * Special hook for Fast retransmit, allows us to track the highest 917 * TSN that is NEW in this SACK if gap ack blocks are present. 918 */ 919 uint32_t this_sack_highest_gap; 920 921 /* 922 * The highest consecutive TSN that has been acked by peer on my 923 * sends 924 */ 925 uint32_t last_acked_seq; 926 927 /* The next TSN that I will use in sending. */ 928 uint32_t sending_seq; 929 930 /* Original seq number I used ??questionable to keep?? */ 931 uint32_t init_seq_number; 932 933 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 934 /* (A1 in Section 4.2) */ 935 uint32_t advanced_peer_ack_point; 936 937 /* 938 * The highest consequetive TSN at the bottom of the mapping array 939 * (for his sends). 940 */ 941 uint32_t cumulative_tsn; 942 /* 943 * Used to track the mapping array and its offset bits. This MAY be 944 * lower then cumulative_tsn. 945 */ 946 uint32_t mapping_array_base_tsn; 947 /* 948 * used to track highest TSN we have received and is listed in the 949 * mapping array. 950 */ 951 uint32_t highest_tsn_inside_map; 952 953 /* EY - new NR variables used for nr_sack based on mapping_array */ 954 uint8_t *nr_mapping_array; 955 uint32_t highest_tsn_inside_nr_map; 956 957 uint32_t fast_recovery_tsn; 958 uint32_t sat_t3_recovery_tsn; 959 uint32_t tsn_last_delivered; 960 /* 961 * For the pd-api we should re-write this a bit more efficient. We 962 * could have multiple sctp_queued_to_read's that we are building at 963 * once. Now we only do this when we get ready to deliver to the 964 * socket buffer. Note that we depend on the fact that the struct is 965 * "stuck" on the read queue until we finish all the pd-api. 966 */ 967 struct sctp_queued_to_read *control_pdapi; 968 969 uint32_t tsn_of_pdapi_last_delivered; 970 uint32_t pdapi_ppid; 971 uint32_t context; 972 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 973 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 974 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 975 #ifdef SCTP_ASOCLOG_OF_TSNS 976 /* 977 * special log - This adds considerable size to the asoc, but 978 * provides a log that you can use to detect problems via kgdb. 979 */ 980 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE]; 981 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE]; 982 uint32_t cumack_log[SCTP_TSN_LOG_SIZE]; 983 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE]; 984 uint16_t tsn_in_at; 985 uint16_t tsn_out_at; 986 uint16_t tsn_in_wrapped; 987 uint16_t tsn_out_wrapped; 988 uint16_t cumack_log_at; 989 uint16_t cumack_log_atsnt; 990 #endif /* SCTP_ASOCLOG_OF_TSNS */ 991 #ifdef SCTP_FS_SPEC_LOG 992 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE]; 993 uint16_t fs_index; 994 #endif 995 996 /* 997 * window state information and smallest MTU that I use to bound 998 * segmentation 999 */ 1000 uint32_t peers_rwnd; 1001 uint32_t my_rwnd; 1002 uint32_t my_last_reported_rwnd; 1003 uint32_t sctp_frag_point; 1004 1005 uint32_t total_output_queue_size; 1006 1007 uint32_t sb_cc; /* shadow of sb_cc */ 1008 uint32_t sb_send_resv; /* amount reserved on a send */ 1009 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd 1010 * control */ 1011 #ifdef INET6 1012 uint32_t default_flowlabel; 1013 #endif 1014 uint32_t pr_sctp_cnt; 1015 int ctrl_queue_cnt; /* could be removed REM - NO IT CAN'T!! RRS */ 1016 /* 1017 * All outbound datagrams queue into this list from the individual 1018 * stream queue. Here they get assigned a TSN and then await 1019 * sending. The stream seq comes when it is first put in the 1020 * individual str queue 1021 */ 1022 unsigned int stream_queue_cnt; 1023 unsigned int send_queue_cnt; 1024 unsigned int sent_queue_cnt; 1025 unsigned int sent_queue_cnt_removeable; 1026 /* 1027 * Number on sent queue that are marked for retran until this value 1028 * is 0 we only send one packet of retran'ed data. 1029 */ 1030 unsigned int sent_queue_retran_cnt; 1031 1032 unsigned int size_on_reasm_queue; 1033 unsigned int cnt_on_reasm_queue; 1034 unsigned int fwd_tsn_cnt; 1035 /* amount of data (bytes) currently in flight (on all destinations) */ 1036 unsigned int total_flight; 1037 /* Total book size in flight */ 1038 unsigned int total_flight_count; /* count of chunks used with 1039 * book total */ 1040 /* count of destinaton nets and list of destination nets */ 1041 unsigned int numnets; 1042 1043 /* Total error count on this association */ 1044 unsigned int overall_error_count; 1045 1046 unsigned int cnt_msg_on_sb; 1047 1048 /* All stream count of chunks for delivery */ 1049 unsigned int size_on_all_streams; 1050 unsigned int cnt_on_all_streams; 1051 1052 /* Heart Beat delay in ms */ 1053 uint32_t heart_beat_delay; 1054 1055 /* autoclose */ 1056 uint32_t sctp_autoclose_ticks; 1057 1058 /* how many preopen streams we have */ 1059 unsigned int pre_open_streams; 1060 1061 /* How many streams I support coming into me */ 1062 unsigned int max_inbound_streams; 1063 1064 /* the cookie life I award for any cookie, in seconds */ 1065 uint32_t cookie_life; 1066 /* time to delay acks for */ 1067 unsigned int delayed_ack; 1068 unsigned int old_delayed_ack; 1069 unsigned int sack_freq; 1070 unsigned int data_pkts_seen; 1071 1072 unsigned int numduptsns; 1073 int dup_tsns[SCTP_MAX_DUP_TSNS]; 1074 uint32_t initial_init_rto_max; /* initial RTO for INIT's */ 1075 uint32_t initial_rto; /* initial send RTO */ 1076 uint32_t minrto; /* per assoc RTO-MIN */ 1077 uint32_t maxrto; /* per assoc RTO-MAX */ 1078 1079 /* authentication fields */ 1080 sctp_auth_chklist_t *local_auth_chunks; 1081 sctp_auth_chklist_t *peer_auth_chunks; 1082 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 1083 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 1084 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 1085 sctp_authinfo_t authinfo; /* randoms, cached keys */ 1086 /* 1087 * refcnt to block freeing when a sender or receiver is off coping 1088 * user data in. 1089 */ 1090 uint32_t refcnt; 1091 uint32_t chunks_on_out_queue; /* total chunks floating around, 1092 * locked by send socket buffer */ 1093 uint32_t peers_adaptation; 1094 uint32_t default_mtu; 1095 uint16_t peer_hmac_id; /* peer HMAC id to send */ 1096 1097 /* 1098 * Being that we have no bag to collect stale cookies, and that we 1099 * really would not want to anyway.. we will count them in this 1100 * counter. We of course feed them to the pigeons right away (I have 1101 * always thought of pigeons as flying rats). 1102 */ 1103 uint16_t stale_cookie_count; 1104 1105 /* 1106 * For the partial delivery API, if up, invoked this is what last 1107 * TSN I delivered 1108 */ 1109 uint16_t str_of_pdapi; 1110 uint16_t ssn_of_pdapi; 1111 1112 /* counts of actual built streams. Allocation may be more however */ 1113 /* could re-arrange to optimize space here. */ 1114 uint16_t streamincnt; 1115 uint16_t streamoutcnt; 1116 uint16_t strm_realoutsize; 1117 uint16_t strm_pending_add_size; 1118 /* my maximum number of retrans of INIT and SEND */ 1119 /* copied from SCTP but should be individually setable */ 1120 uint16_t max_init_times; 1121 uint16_t max_send_times; 1122 1123 uint16_t def_net_failure; 1124 1125 uint16_t def_net_pf_threshold; 1126 1127 /* 1128 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 1129 * awaiting ACK 1130 */ 1131 uint16_t mapping_array_size; 1132 1133 uint16_t last_strm_seq_delivered; 1134 uint16_t last_strm_no_delivered; 1135 1136 uint16_t last_revoke_count; 1137 int16_t num_send_timers_up; 1138 1139 uint16_t stream_locked_on; 1140 uint16_t ecn_echo_cnt_onq; 1141 1142 uint16_t free_chunk_cnt; 1143 uint8_t stream_locked; 1144 uint8_t authenticated; /* packet authenticated ok */ 1145 /* 1146 * This flag indicates that a SACK need to be sent. Initially this 1147 * is 1 to send the first sACK immediately. 1148 */ 1149 uint8_t send_sack; 1150 1151 /* max burst of new packets into the network */ 1152 uint32_t max_burst; 1153 /* max burst of fast retransmit packets */ 1154 uint32_t fr_max_burst; 1155 1156 uint8_t sat_network; /* RTT is in range of sat net or greater */ 1157 uint8_t sat_network_lockout; /* lockout code */ 1158 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 1159 /* flag goes on when we are doing a partial delivery api */ 1160 uint8_t hb_random_values[4]; 1161 uint8_t fragmented_delivery_inprogress; 1162 uint8_t fragment_flags; 1163 uint8_t last_flags_delivered; 1164 uint8_t hb_ect_randombit; 1165 uint8_t hb_random_idx; 1166 uint8_t default_dscp; 1167 uint8_t asconf_del_pending; /* asconf delete last addr pending */ 1168 uint8_t trigger_reset; 1169 /* 1170 * This value, plus all other ack'd but above cum-ack is added 1171 * together to cross check against the bit that we have yet to 1172 * define (probably in the SACK). When the cum-ack is updated, this 1173 * sum is updated as well. 1174 */ 1175 1176 /* Flags whether an extension is supported or not */ 1177 uint8_t ecn_supported; 1178 uint8_t prsctp_supported; 1179 uint8_t auth_supported; 1180 uint8_t asconf_supported; 1181 uint8_t reconfig_supported; 1182 uint8_t nrsack_supported; 1183 uint8_t pktdrop_supported; 1184 uint8_t idata_supported; 1185 1186 /* Zero checksum supported information */ 1187 uint8_t rcv_edmid; 1188 uint8_t snd_edmid; 1189 1190 /* Did the peer make the stream config (add out) request */ 1191 uint8_t peer_req_out; 1192 1193 uint8_t local_strreset_support; 1194 uint8_t peer_supports_nat; 1195 1196 struct sctp_scoping scope; 1197 /* flags to handle send alternate net tracking */ 1198 uint8_t used_alt_asconfack; 1199 uint8_t fast_retran_loss_recovery; 1200 uint8_t sat_t3_loss_recovery; 1201 uint8_t dropped_special_cnt; 1202 uint8_t seen_a_sack_this_pkt; 1203 uint8_t stream_reset_outstanding; 1204 uint8_t stream_reset_out_is_outstanding; 1205 uint8_t delayed_connection; 1206 uint8_t ifp_had_enobuf; 1207 uint8_t saw_sack_with_frags; 1208 uint8_t saw_sack_with_nr_frags; 1209 uint8_t in_asocid_hash; 1210 uint8_t assoc_up_sent; 1211 uint8_t adaptation_needed; 1212 uint8_t adaptation_sent; 1213 /* CMT variables */ 1214 uint8_t cmt_dac_pkts_rcvd; 1215 uint8_t sctp_cmt_on_off; 1216 uint8_t iam_blocking; 1217 uint8_t cookie_how[8]; 1218 /* JRS 5/21/07 - CMT PF variable */ 1219 uint8_t sctp_cmt_pf; 1220 uint8_t use_precise_time; 1221 uint64_t sctp_features; 1222 uint32_t max_cwnd; 1223 uint16_t port; /* remote UDP encapsulation port */ 1224 /* 1225 * The mapping array is used to track out of order sequences above 1226 * last_acked_seq. 0 indicates packet missing 1 indicates packet 1227 * rec'd. We slide it up every time we raise last_acked_seq and 0 1228 * trailing locactions out. If I get a TSN above the array 1229 * mappingArraySz, I discard the datagram and let retransmit happen. 1230 */ 1231 uint32_t marked_retrans; 1232 uint32_t timoinit; 1233 uint32_t timodata; 1234 uint32_t timosack; 1235 uint32_t timoshutdown; 1236 uint32_t timoheartbeat; 1237 uint32_t timocookie; 1238 uint32_t timoshutdownack; 1239 struct timeval start_time; 1240 struct timeval discontinuity_time; 1241 uint64_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 1242 uint64_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 1243 }; 1244 1245 #endif 1246