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 65 struct sctp_foo_stuff { 66 struct sctp_inpcb *inp; 67 uint32_t lineno; 68 uint32_t ticks; 69 int updown; 70 }; 71 72 73 /* 74 * This is the information we track on each interface that we know about from 75 * the distant end. 76 */ 77 TAILQ_HEAD(sctpnetlisthead, sctp_nets); 78 79 struct sctp_stream_reset_list { 80 TAILQ_ENTRY(sctp_stream_reset_list) next_resp; 81 uint32_t seq; 82 uint32_t tsn; 83 uint32_t number_entries; 84 uint16_t list_of_streams[]; 85 }; 86 87 TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list); 88 89 /* 90 * Users of the iterator need to malloc a iterator with a call to 91 * sctp_initiate_iterator(inp_func, assoc_func, inp_func, pcb_flags, pcb_features, 92 * asoc_state, void-ptr-arg, uint32-arg, end_func, inp); 93 * 94 * Use the following two defines if you don't care what pcb flags are on the EP 95 * and/or you don't care what state the association is in. 96 * 97 * Note that if you specify an INP as the last argument then ONLY each 98 * association of that single INP will be executed upon. Note that the pcb 99 * flags STILL apply so if the inp you specify has different pcb_flags then 100 * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to 101 * assure the inp you specify gets treated. 102 */ 103 #define SCTP_PCB_ANY_FLAGS 0x00000000 104 #define SCTP_PCB_ANY_FEATURES 0x00000000 105 #define SCTP_ASOC_ANY_STATE 0x00000000 106 107 typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr, 108 uint32_t val); 109 typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val); 110 typedef void (*end_func) (void *ptr, uint32_t val); 111 112 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 113 /* whats on the mcore control struct */ 114 struct sctp_mcore_queue { 115 TAILQ_ENTRY(sctp_mcore_queue) next; 116 struct vnet *vn; 117 struct mbuf *m; 118 int off; 119 int v6; 120 }; 121 122 TAILQ_HEAD(sctp_mcore_qhead, sctp_mcore_queue); 123 124 struct sctp_mcore_ctrl { 125 SCTP_PROCESS_STRUCT thread_proc; 126 struct sctp_mcore_qhead que; 127 struct mtx core_mtx; 128 struct mtx que_mtx; 129 int running; 130 int cpuid; 131 }; 132 133 134 #endif 135 136 137 struct sctp_iterator { 138 TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr; 139 struct vnet *vn; 140 struct sctp_timer tmr; 141 struct sctp_inpcb *inp; /* current endpoint */ 142 struct sctp_tcb *stcb; /* current* assoc */ 143 struct sctp_inpcb *next_inp; /* special hook to skip to */ 144 asoc_func function_assoc; /* per assoc function */ 145 inp_func function_inp; /* per endpoint function */ 146 inp_func function_inp_end; /* end INP function */ 147 end_func function_atend; /* iterator completion function */ 148 void *pointer; /* pointer for apply func to use */ 149 uint32_t val; /* value for apply func to use */ 150 uint32_t pcb_flags; /* endpoint flags being checked */ 151 uint32_t pcb_features; /* endpoint features being checked */ 152 uint32_t asoc_state; /* assoc state being checked */ 153 uint32_t iterator_flags; 154 uint8_t no_chunk_output; 155 uint8_t done_current_ep; 156 }; 157 158 /* iterator_flags values */ 159 #define SCTP_ITERATOR_DO_ALL_INP 0x00000001 160 #define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002 161 162 163 TAILQ_HEAD(sctpiterators, sctp_iterator); 164 165 struct sctp_copy_all { 166 struct sctp_inpcb *inp; /* ep */ 167 struct mbuf *m; 168 struct sctp_sndrcvinfo sndrcv; 169 ssize_t sndlen; 170 int cnt_sent; 171 int cnt_failed; 172 }; 173 174 struct sctp_asconf_iterator { 175 struct sctpladdr list_of_work; 176 int cnt; 177 }; 178 179 struct iterator_control { 180 struct mtx ipi_iterator_wq_mtx; 181 struct mtx it_mtx; 182 SCTP_PROCESS_STRUCT thread_proc; 183 struct sctpiterators iteratorhead; 184 struct sctp_iterator *cur_it; 185 uint32_t iterator_running; 186 uint32_t iterator_flags; 187 }; 188 #define SCTP_ITERATOR_STOP_CUR_IT 0x00000004 189 #define SCTP_ITERATOR_STOP_CUR_INP 0x00000008 190 191 struct sctp_net_route { 192 sctp_rtentry_t *ro_rt; 193 struct llentry *ro_lle; 194 char *ro_prepend; 195 uint16_t ro_plen; 196 uint16_t ro_flags; 197 uint16_t ro_mtu; 198 uint16_t spare; 199 union sctp_sockstore _l_addr; /* remote peer addr */ 200 struct sctp_ifa *_s_addr; /* our selected src addr */ 201 }; 202 203 struct htcp { 204 uint16_t alpha; /* Fixed point arith, << 7 */ 205 uint8_t beta; /* Fixed point arith, << 7 */ 206 uint8_t modeswitch; /* Delay modeswitch until we had at least one 207 * congestion event */ 208 uint32_t last_cong; /* Time since last congestion event end */ 209 uint32_t undo_last_cong; 210 uint16_t bytes_acked; 211 uint32_t bytecount; 212 uint32_t minRTT; 213 uint32_t maxRTT; 214 215 uint32_t undo_maxRTT; 216 uint32_t undo_old_maxB; 217 218 /* Bandwidth estimation */ 219 uint32_t minB; 220 uint32_t maxB; 221 uint32_t old_maxB; 222 uint32_t Bi; 223 uint32_t lasttime; 224 }; 225 226 struct rtcc_cc { 227 struct timeval tls; /* The time we started the sending */ 228 uint64_t lbw; /* Our last estimated bw */ 229 uint64_t lbw_rtt; /* RTT at bw estimate */ 230 uint64_t bw_bytes; /* The total bytes since this sending began */ 231 uint64_t bw_tot_time; /* The total time since sending began */ 232 uint64_t new_tot_time; /* temp holding the new value */ 233 uint64_t bw_bytes_at_last_rttc; /* What bw_bytes was at last rtt calc */ 234 uint32_t cwnd_at_bw_set; /* Cwnd at last bw saved - lbw */ 235 uint32_t vol_reduce; /* cnt of voluntary reductions */ 236 uint16_t steady_step; /* The number required to be in steady state */ 237 uint16_t step_cnt; /* The current number */ 238 uint8_t ret_from_eq; /* When all things are equal what do I return 239 * 0/1 - 1 no cc advance */ 240 uint8_t use_dccc_ecn; /* Flag to enable DCCC ECN */ 241 uint8_t tls_needs_set; /* Flag to indicate we need to set tls 0 or 1 242 * means set at send 2 not */ 243 uint8_t last_step_state; /* Last state if steady state stepdown 244 * is on */ 245 uint8_t rtt_set_this_sack; /* Flag saying this sack had RTT calc 246 * on it */ 247 uint8_t last_inst_ind; /* Last saved inst indication */ 248 }; 249 250 251 struct sctp_nets { 252 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */ 253 254 /* 255 * Things on the top half may be able to be split into a common 256 * structure shared by all. 257 */ 258 struct sctp_timer pmtu_timer; 259 struct sctp_timer hb_timer; 260 261 /* 262 * The following two in combination equate to a route entry for v6 263 * or v4. 264 */ 265 struct sctp_net_route ro; 266 267 /* mtu discovered so far */ 268 uint32_t mtu; 269 uint32_t ssthresh; /* not sure about this one for split */ 270 uint32_t last_cwr_tsn; 271 uint32_t cwr_window_tsn; 272 uint32_t ecn_ce_pkt_cnt; 273 uint32_t lost_cnt; 274 /* smoothed average things for RTT and RTO itself */ 275 int lastsa; 276 int lastsv; 277 uint64_t rtt; /* last measured rtt value in us */ 278 unsigned int RTO; 279 280 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */ 281 struct sctp_timer rxt_timer; 282 283 /* last time in seconds I sent to it */ 284 struct timeval last_sent_time; 285 union cc_control_data { 286 struct htcp htcp_ca; /* JRS - struct used in HTCP algorithm */ 287 struct rtcc_cc rtcc; /* rtcc module cc stuff */ 288 } cc_mod; 289 int ref_count; 290 291 /* Congestion stats per destination */ 292 /* 293 * flight size variables and such, sorry Vern, I could not avoid 294 * this if I wanted performance :> 295 */ 296 uint32_t flight_size; 297 uint32_t cwnd; /* actual cwnd */ 298 uint32_t prev_cwnd; /* cwnd before any processing */ 299 uint32_t ecn_prev_cwnd; /* ECN prev cwnd at first ecn_echo seen in new 300 * window */ 301 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */ 302 /* tracking variables to avoid the aloc/free in sack processing */ 303 unsigned int net_ack; 304 unsigned int net_ack2; 305 306 /* 307 * JRS - 5/8/07 - Variable to track last time a destination was 308 * active for CMT PF 309 */ 310 uint32_t last_active; 311 312 /* 313 * CMT variables ([email protected]) 314 */ 315 uint32_t this_sack_highest_newack; /* tracks highest TSN newly 316 * acked for a given dest in 317 * the current SACK. Used in 318 * SFR and HTNA algos */ 319 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected 320 * pseudo-cumack for this destination */ 321 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next 322 * expected pseudo-cumack for this 323 * destination */ 324 325 /* CMT fast recovery variables */ 326 uint32_t fast_recovery_tsn; 327 uint32_t heartbeat_random1; 328 uint32_t heartbeat_random2; 329 #ifdef INET6 330 uint32_t flowlabel; 331 #endif 332 uint8_t dscp; 333 334 struct timeval start_time; /* time when this net was created */ 335 uint32_t marked_retrans; /* number or DATA chunks marked for 336 * timer based retransmissions */ 337 uint32_t marked_fastretrans; 338 uint32_t heart_beat_delay; /* Heart Beat delay in ms */ 339 340 /* if this guy is ok or not ... status */ 341 uint16_t dest_state; 342 /* number of timeouts to consider the destination unreachable */ 343 uint16_t failure_threshold; 344 /* number of timeouts to consider the destination potentially failed */ 345 uint16_t pf_threshold; 346 /* error stats on the destination */ 347 uint16_t error_count; 348 /* UDP port number in case of UDP tunneling */ 349 uint16_t port; 350 351 uint8_t fast_retran_loss_recovery; 352 uint8_t will_exit_fast_recovery; 353 /* Flags that probably can be combined into dest_state */ 354 uint8_t fast_retran_ip; /* fast retransmit in progress */ 355 uint8_t hb_responded; 356 uint8_t saw_newack; /* CMT's SFR algorithm flag */ 357 uint8_t src_addr_selected; /* if we split we move */ 358 uint8_t indx_of_eligible_next_to_use; 359 uint8_t addr_is_local; /* its a local address (if known) could move 360 * in split */ 361 362 /* 363 * CMT variables ([email protected]) 364 */ 365 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to 366 * find a new pseudocumack. This flag 367 * is set after a new pseudo-cumack 368 * has been received and indicates 369 * that the sender should find the 370 * next pseudo-cumack expected for 371 * this destination */ 372 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to 373 * find a new rtx-pseudocumack. This 374 * flag is set after a new 375 * rtx-pseudo-cumack has been received 376 * and indicates that the sender 377 * should find the next 378 * rtx-pseudo-cumack expected for this 379 * destination */ 380 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to 381 * indicate if a new pseudo-cumack or 382 * rtx-pseudo-cumack has been received */ 383 uint8_t window_probe; /* Doing a window probe? */ 384 uint8_t RTO_measured; /* Have we done the first measure */ 385 uint8_t last_hs_used; /* index into the last HS table entry we used */ 386 uint8_t lan_type; 387 uint8_t rto_needed; 388 uint32_t flowid; 389 uint8_t flowtype; 390 }; 391 392 393 struct sctp_data_chunkrec { 394 uint32_t tsn; /* the TSN of this transmit */ 395 uint32_t mid; /* the message identifier of this transmit */ 396 uint16_t sid; /* the stream number of this guy */ 397 uint32_t ppid; 398 uint32_t context; /* from send */ 399 uint32_t cwnd_at_send; 400 /* 401 * part of the Highest sacked algorithm to be able to stroke counts 402 * on ones that are FR'd. 403 */ 404 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 405 struct timeval timetodrop; /* time we drop it from queue */ 406 uint32_t fsn; /* Fragment Sequence Number */ 407 uint8_t doing_fast_retransmit; 408 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 409 * outbound holds sending flags for PR-SCTP. */ 410 uint8_t state_flags; 411 uint8_t chunk_was_revoked; 412 uint8_t fwd_tsn_cnt; 413 }; 414 415 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 416 417 /* The lower byte is used to enumerate PR_SCTP policies */ 418 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 419 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 420 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 421 422 /* The upper byte is used as a bit mask */ 423 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100 424 425 struct chk_id { 426 uint8_t id; 427 uint8_t can_take_data; 428 }; 429 430 431 struct sctp_tmit_chunk { 432 union { 433 struct sctp_data_chunkrec data; 434 struct chk_id chunk_id; 435 } rec; 436 struct sctp_association *asoc; /* bp to asoc this belongs to */ 437 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 438 struct mbuf *data; /* pointer to mbuf chain of data */ 439 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 440 struct sctp_nets *whoTo; 441 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 442 int32_t sent; /* the send status */ 443 uint16_t snd_count; /* number of times I sent */ 444 uint16_t flags; /* flags, such as FRAGMENT_OK */ 445 uint16_t send_size; 446 uint16_t book_size; 447 uint16_t mbcnt; 448 uint16_t auth_keyid; 449 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */ 450 uint8_t pad_inplace; 451 uint8_t do_rtt; 452 uint8_t book_size_scale; 453 uint8_t no_fr_allowed; 454 uint8_t copy_by_ref; 455 uint8_t window_probe; 456 }; 457 458 struct sctp_queued_to_read { /* sinfo structure Pluse more */ 459 uint16_t sinfo_stream; /* off the wire */ 460 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for 461 * EOR */ 462 uint32_t sinfo_ppid; /* off the wire */ 463 uint32_t sinfo_context; /* pick this up from assoc def context? */ 464 uint32_t sinfo_timetolive; /* not used by kernel */ 465 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */ 466 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */ 467 sctp_assoc_t sinfo_assoc_id; /* our assoc id */ 468 /* Non sinfo stuff */ 469 uint32_t mid; /* Fragment Index */ 470 uint32_t length; /* length of data */ 471 uint32_t held_length; /* length held in sb */ 472 uint32_t top_fsn; /* Highest FSN in queue */ 473 uint32_t fsn_included; /* Highest FSN in *data portion */ 474 struct sctp_nets *whoFrom; /* where it came from */ 475 struct mbuf *data; /* front of the mbuf chain of data with 476 * PKT_HDR */ 477 struct mbuf *tail_mbuf; /* used for multi-part data */ 478 struct mbuf *aux_data; /* used to hold/cache control if o/s does not 479 * take it from us */ 480 struct sctp_tcb *stcb; /* assoc, used for window update */ 481 TAILQ_ENTRY(sctp_queued_to_read) next; 482 TAILQ_ENTRY(sctp_queued_to_read) next_instrm; 483 struct sctpchunk_listhead reasm; 484 uint16_t port_from; 485 uint16_t spec_flags; /* Flags to hold the notification field */ 486 uint8_t do_not_ref_stcb; 487 uint8_t end_added; 488 uint8_t pdapi_aborted; 489 uint8_t pdapi_started; 490 uint8_t some_taken; 491 uint8_t last_frag_seen; 492 uint8_t first_frag_seen; 493 uint8_t on_read_q; 494 uint8_t on_strm_q; 495 }; 496 497 #define SCTP_ON_ORDERED 1 498 #define SCTP_ON_UNORDERED 2 499 500 /* This data structure will be on the outbound 501 * stream queues. Data will be pulled off from 502 * the front of the mbuf data and chunk-ified 503 * by the output routines. We will custom 504 * fit every chunk we pull to the send/sent 505 * queue to make up the next full packet 506 * if we can. An entry cannot be removed 507 * from the stream_out queue until 508 * the msg_is_complete flag is set. This 509 * means at times data/tail_mbuf MIGHT 510 * be NULL.. If that occurs it happens 511 * for one of two reasons. Either the user 512 * is blocked on a send() call and has not 513 * awoken to copy more data down... OR 514 * the user is in the explict MSG_EOR mode 515 * and wrote some data, but has not completed 516 * sending. 517 */ 518 struct sctp_stream_queue_pending { 519 struct mbuf *data; 520 struct mbuf *tail_mbuf; 521 struct timeval ts; 522 struct sctp_nets *net; 523 TAILQ_ENTRY(sctp_stream_queue_pending) next; 524 TAILQ_ENTRY(sctp_stream_queue_pending) ss_next; 525 uint32_t fsn; 526 uint32_t length; 527 uint32_t timetolive; 528 uint32_t ppid; 529 uint32_t context; 530 uint16_t sinfo_flags; 531 uint16_t sid; 532 uint16_t act_flags; 533 uint16_t auth_keyid; 534 uint8_t holds_key_ref; 535 uint8_t msg_is_complete; 536 uint8_t some_taken; 537 uint8_t sender_all_done; 538 uint8_t put_last_out; 539 uint8_t discard_rest; 540 uint8_t processing; 541 }; 542 543 /* 544 * this struct contains info that is used to track inbound stream data and 545 * help with ordering. 546 */ 547 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 548 struct sctp_stream_in { 549 struct sctp_readhead inqueue; 550 struct sctp_readhead uno_inqueue; 551 uint32_t last_mid_delivered; /* used for re-order */ 552 uint16_t sid; 553 uint8_t delivery_started; 554 uint8_t pd_api_started; 555 }; 556 557 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 558 TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending); 559 560 561 /* Round-robin schedulers */ 562 struct ss_rr { 563 /* next link in wheel */ 564 TAILQ_ENTRY(sctp_stream_out) next_spoke; 565 }; 566 567 /* Priority scheduler */ 568 struct ss_prio { 569 /* next link in wheel */ 570 TAILQ_ENTRY(sctp_stream_out) next_spoke; 571 /* priority id */ 572 uint16_t priority; 573 }; 574 575 /* Fair Bandwidth scheduler */ 576 struct ss_fb { 577 /* next link in wheel */ 578 TAILQ_ENTRY(sctp_stream_out) next_spoke; 579 /* stores message size */ 580 int32_t rounds; 581 }; 582 583 /* 584 * This union holds all data necessary for 585 * different stream schedulers. 586 */ 587 struct scheduling_data { 588 struct sctp_stream_out *locked_on_sending; 589 /* circular looking for output selection */ 590 struct sctp_stream_out *last_out_stream; 591 union { 592 struct sctpwheel_listhead wheel; 593 struct sctplist_listhead list; 594 } out; 595 }; 596 597 /* 598 * This union holds all parameters per stream 599 * necessary for different stream schedulers. 600 */ 601 union scheduling_parameters { 602 struct ss_rr rr; 603 struct ss_prio prio; 604 struct ss_fb fb; 605 }; 606 607 /* States for outgoing streams */ 608 #define SCTP_STREAM_CLOSED 0x00 609 #define SCTP_STREAM_OPENING 0x01 610 #define SCTP_STREAM_OPEN 0x02 611 #define SCTP_STREAM_RESET_PENDING 0x03 612 #define SCTP_STREAM_RESET_IN_FLIGHT 0x04 613 614 #define SCTP_MAX_STREAMS_AT_ONCE_RESET 200 615 616 /* This struct is used to track the traffic on outbound streams */ 617 struct sctp_stream_out { 618 struct sctp_streamhead outqueue; 619 union scheduling_parameters ss_params; 620 uint32_t chunks_on_queues; /* send queue and sent queue */ 621 #if defined(SCTP_DETAILED_STR_STATS) 622 uint32_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 623 uint32_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 624 #else 625 /* Only the aggregation */ 626 uint32_t abandoned_unsent[1]; 627 uint32_t abandoned_sent[1]; 628 #endif 629 /* 630 * For associations using DATA chunks, the lower 16-bit of 631 * next_mid_ordered are used as the next SSN. 632 */ 633 uint32_t next_mid_ordered; 634 uint32_t next_mid_unordered; 635 uint16_t sid; 636 uint8_t last_msg_incomplete; 637 uint8_t state; 638 }; 639 640 /* used to keep track of the addresses yet to try to add/delete */ 641 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 642 struct sctp_asconf_addr { 643 TAILQ_ENTRY(sctp_asconf_addr) next; 644 struct sctp_asconf_addr_param ap; 645 struct sctp_ifa *ifa; /* save the ifa for add/del ip */ 646 uint8_t sent; /* has this been sent yet? */ 647 uint8_t special_del; /* not to be used in lookup */ 648 }; 649 650 struct sctp_scoping { 651 uint8_t ipv4_addr_legal; 652 uint8_t ipv6_addr_legal; 653 uint8_t loopback_scope; 654 uint8_t ipv4_local_scope; 655 uint8_t local_scope; 656 uint8_t site_scope; 657 }; 658 659 #define SCTP_TSN_LOG_SIZE 40 660 661 struct sctp_tsn_log { 662 void *stcb; 663 uint32_t tsn; 664 uint32_t seq; 665 uint16_t strm; 666 uint16_t sz; 667 uint16_t flgs; 668 uint16_t in_pos; 669 uint16_t in_out; 670 uint16_t resv; 671 }; 672 673 #define SCTP_FS_SPEC_LOG_SIZE 200 674 struct sctp_fs_spec_log { 675 uint32_t sent; 676 uint32_t total_flight; 677 uint32_t tsn; 678 uint16_t book; 679 uint8_t incr; 680 uint8_t decr; 681 }; 682 683 /* This struct is here to cut out the compatiabilty 684 * pad that bulks up both the inp and stcb. The non 685 * pad portion MUST stay in complete sync with 686 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added 687 * this must be done here too. 688 */ 689 struct sctp_nonpad_sndrcvinfo { 690 uint16_t sinfo_stream; 691 uint16_t sinfo_ssn; 692 uint16_t sinfo_flags; 693 uint32_t sinfo_ppid; 694 uint32_t sinfo_context; 695 uint32_t sinfo_timetolive; 696 uint32_t sinfo_tsn; 697 uint32_t sinfo_cumtsn; 698 sctp_assoc_t sinfo_assoc_id; 699 uint16_t sinfo_keynumber; 700 uint16_t sinfo_keynumber_valid; 701 }; 702 703 /* 704 * JRS - Structure to hold function pointers to the functions responsible 705 * for congestion control. 706 */ 707 708 struct sctp_cc_functions { 709 void (*sctp_set_initial_cc_param) (struct sctp_tcb *stcb, struct sctp_nets *net); 710 void (*sctp_cwnd_update_after_sack) (struct sctp_tcb *stcb, 711 struct sctp_association *asoc, 712 int accum_moved, int reneged_all, int will_exit); 713 void (*sctp_cwnd_update_exit_pf) (struct sctp_tcb *stcb, struct sctp_nets *net); 714 void (*sctp_cwnd_update_after_fr) (struct sctp_tcb *stcb, 715 struct sctp_association *asoc); 716 void (*sctp_cwnd_update_after_timeout) (struct sctp_tcb *stcb, 717 struct sctp_nets *net); 718 void (*sctp_cwnd_update_after_ecn_echo) (struct sctp_tcb *stcb, 719 struct sctp_nets *net, int in_window, int num_pkt_lost); 720 void (*sctp_cwnd_update_after_packet_dropped) (struct sctp_tcb *stcb, 721 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp, 722 uint32_t *bottle_bw, uint32_t *on_queue); 723 void (*sctp_cwnd_update_after_output) (struct sctp_tcb *stcb, 724 struct sctp_nets *net, int burst_limit); 725 void (*sctp_cwnd_update_packet_transmitted) (struct sctp_tcb *stcb, 726 struct sctp_nets *net); 727 void (*sctp_cwnd_update_tsn_acknowledged) (struct sctp_nets *net, 728 struct sctp_tmit_chunk *); 729 void (*sctp_cwnd_new_transmission_begins) (struct sctp_tcb *stcb, 730 struct sctp_nets *net); 731 void (*sctp_cwnd_prepare_net_for_sack) (struct sctp_tcb *stcb, 732 struct sctp_nets *net); 733 int (*sctp_cwnd_socket_option) (struct sctp_tcb *stcb, int set, struct sctp_cc_option *); 734 void (*sctp_rtt_calculated) (struct sctp_tcb *, struct sctp_nets *, struct timeval *); 735 }; 736 737 /* 738 * RS - Structure to hold function pointers to the functions responsible 739 * for stream scheduling. 740 */ 741 struct sctp_ss_functions { 742 void (*sctp_ss_init) (struct sctp_tcb *stcb, struct sctp_association *asoc, 743 int holds_lock); 744 void (*sctp_ss_clear) (struct sctp_tcb *stcb, struct sctp_association *asoc, 745 int clear_values, int holds_lock); 746 void (*sctp_ss_init_stream) (struct sctp_tcb *stcb, struct sctp_stream_out *strq, struct sctp_stream_out *with_strq); 747 void (*sctp_ss_add_to_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 748 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 749 int (*sctp_ss_is_empty) (struct sctp_tcb *stcb, struct sctp_association *asoc); 750 void (*sctp_ss_remove_from_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 751 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 752 struct sctp_stream_out *(*sctp_ss_select_stream) (struct sctp_tcb *stcb, 753 struct sctp_nets *net, struct sctp_association *asoc); 754 void (*sctp_ss_scheduled) (struct sctp_tcb *stcb, struct sctp_nets *net, 755 struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much); 756 void (*sctp_ss_packet_done) (struct sctp_tcb *stcb, struct sctp_nets *net, 757 struct sctp_association *asoc); 758 int (*sctp_ss_get_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 759 struct sctp_stream_out *strq, uint16_t *value); 760 int (*sctp_ss_set_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 761 struct sctp_stream_out *strq, uint16_t value); 762 int (*sctp_ss_is_user_msgs_incomplete) (struct sctp_tcb *stcb, struct sctp_association *asoc); 763 }; 764 765 /* used to save ASCONF chunks for retransmission */ 766 TAILQ_HEAD(sctp_asconf_head, sctp_asconf); 767 struct sctp_asconf { 768 TAILQ_ENTRY(sctp_asconf) next; 769 uint32_t serial_number; 770 uint16_t snd_count; 771 struct mbuf *data; 772 uint16_t len; 773 }; 774 775 /* used to save ASCONF-ACK chunks for retransmission */ 776 TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack); 777 struct sctp_asconf_ack { 778 TAILQ_ENTRY(sctp_asconf_ack) next; 779 uint32_t serial_number; 780 struct sctp_nets *last_sent_to; 781 struct mbuf *data; 782 uint16_t len; 783 }; 784 785 /* 786 * Here we have information about each individual association that we track. 787 * We probably in production would be more dynamic. But for ease of 788 * implementation we will have a fixed array that we hunt for in a linear 789 * fashion. 790 */ 791 struct sctp_association { 792 /* association state */ 793 int state; 794 795 /* queue of pending addrs to add/delete */ 796 struct sctp_asconf_addrhead asconf_queue; 797 798 struct timeval time_entered; /* time we entered state */ 799 struct timeval time_last_rcvd; 800 struct timeval time_last_sent; 801 struct timeval time_last_sat_advance; 802 struct sctp_nonpad_sndrcvinfo def_send; 803 804 /* timers and such */ 805 struct sctp_timer dack_timer; /* Delayed ack timer */ 806 struct sctp_timer asconf_timer; /* asconf */ 807 struct sctp_timer strreset_timer; /* stream reset */ 808 struct sctp_timer shut_guard_timer; /* shutdown guard */ 809 struct sctp_timer autoclose_timer; /* automatic close timer */ 810 struct sctp_timer delayed_event_timer; /* timer for delayed events */ 811 struct sctp_timer delete_prim_timer; /* deleting primary dst */ 812 813 /* list of restricted local addresses */ 814 struct sctpladdr sctp_restricted_addrs; 815 816 /* last local address pending deletion (waiting for an address add) */ 817 struct sctp_ifa *asconf_addr_del_pending; 818 /* Deleted primary destination (used to stop timer) */ 819 struct sctp_nets *deleted_primary; 820 821 struct sctpnetlisthead nets; /* remote address list */ 822 823 /* Free chunk list */ 824 struct sctpchunk_listhead free_chunks; 825 826 /* Control chunk queue */ 827 struct sctpchunk_listhead control_send_queue; 828 829 /* ASCONF chunk queue */ 830 struct sctpchunk_listhead asconf_send_queue; 831 832 /* 833 * Once a TSN hits the wire it is moved to the sent_queue. We 834 * maintain two counts here (don't know if any but retran_cnt is 835 * needed). The idea is that the sent_queue_retran_cnt reflects how 836 * many chunks have been marked for retranmission by either T3-rxt 837 * or FR. 838 */ 839 struct sctpchunk_listhead sent_queue; 840 struct sctpchunk_listhead send_queue; 841 842 /* Scheduling queues */ 843 struct scheduling_data ss_data; 844 845 /* If an iterator is looking at me, this is it */ 846 struct sctp_iterator *stcb_starting_point_for_iterator; 847 848 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 849 struct sctp_asconf_ackhead asconf_ack_sent; 850 851 /* 852 * pointer to last stream reset queued to control queue by us with 853 * requests. 854 */ 855 struct sctp_tmit_chunk *str_reset; 856 /* 857 * if Source Address Selection happening, this will rotate through 858 * the link list. 859 */ 860 struct sctp_laddr *last_used_address; 861 862 /* stream arrays */ 863 struct sctp_stream_in *strmin; 864 struct sctp_stream_out *strmout; 865 uint8_t *mapping_array; 866 /* primary destination to use */ 867 struct sctp_nets *primary_destination; 868 struct sctp_nets *alternate; /* If primary is down or PF */ 869 /* For CMT */ 870 struct sctp_nets *last_net_cmt_send_started; 871 /* last place I got a data chunk from */ 872 struct sctp_nets *last_data_chunk_from; 873 /* last place I got a control from */ 874 struct sctp_nets *last_control_chunk_from; 875 876 877 /* 878 * wait to the point the cum-ack passes req->send_reset_at_tsn for 879 * any req on the list. 880 */ 881 struct sctp_resethead resetHead; 882 883 /* queue of chunks waiting to be sent into the local stack */ 884 struct sctp_readhead pending_reply_queue; 885 886 /* JRS - the congestion control functions are in this struct */ 887 struct sctp_cc_functions cc_functions; 888 /* 889 * JRS - value to store the currently loaded congestion control 890 * module 891 */ 892 uint32_t congestion_control_module; 893 /* RS - the stream scheduling functions are in this struct */ 894 struct sctp_ss_functions ss_functions; 895 /* RS - value to store the currently loaded stream scheduling module */ 896 uint32_t stream_scheduling_module; 897 898 uint32_t vrf_id; 899 uint32_t cookie_preserve_req; 900 /* ASCONF next seq I am sending out, inits at init-tsn */ 901 uint32_t asconf_seq_out; 902 uint32_t asconf_seq_out_acked; 903 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 904 uint32_t asconf_seq_in; 905 906 /* next seq I am sending in str reset messages */ 907 uint32_t str_reset_seq_out; 908 /* next seq I am expecting in str reset messages */ 909 uint32_t str_reset_seq_in; 910 911 /* various verification tag information */ 912 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 913 * by remote end, and I have unlocked this 914 * will be regenerated to a new random value. */ 915 uint32_t peer_vtag; /* The peers last tag */ 916 917 uint32_t my_vtag_nonce; 918 uint32_t peer_vtag_nonce; 919 920 uint32_t assoc_id; 921 922 /* This is the SCTP fragmentation threshold */ 923 uint32_t smallest_mtu; 924 925 /* 926 * Special hook for Fast retransmit, allows us to track the highest 927 * TSN that is NEW in this SACK if gap ack blocks are present. 928 */ 929 uint32_t this_sack_highest_gap; 930 931 /* 932 * The highest consecutive TSN that has been acked by peer on my 933 * sends 934 */ 935 uint32_t last_acked_seq; 936 937 /* The next TSN that I will use in sending. */ 938 uint32_t sending_seq; 939 940 /* Original seq number I used ??questionable to keep?? */ 941 uint32_t init_seq_number; 942 943 944 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 945 /* (A1 in Section 4.2) */ 946 uint32_t advanced_peer_ack_point; 947 948 /* 949 * The highest consequetive TSN at the bottom of the mapping array 950 * (for his sends). 951 */ 952 uint32_t cumulative_tsn; 953 /* 954 * Used to track the mapping array and its offset bits. This MAY be 955 * lower then cumulative_tsn. 956 */ 957 uint32_t mapping_array_base_tsn; 958 /* 959 * used to track highest TSN we have received and is listed in the 960 * mapping array. 961 */ 962 uint32_t highest_tsn_inside_map; 963 964 /* EY - new NR variables used for nr_sack based on mapping_array */ 965 uint8_t *nr_mapping_array; 966 uint32_t highest_tsn_inside_nr_map; 967 968 uint32_t fast_recovery_tsn; 969 uint32_t sat_t3_recovery_tsn; 970 uint32_t tsn_last_delivered; 971 /* 972 * For the pd-api we should re-write this a bit more efficient. We 973 * could have multiple sctp_queued_to_read's that we are building at 974 * once. Now we only do this when we get ready to deliver to the 975 * socket buffer. Note that we depend on the fact that the struct is 976 * "stuck" on the read queue until we finish all the pd-api. 977 */ 978 struct sctp_queued_to_read *control_pdapi; 979 980 uint32_t tsn_of_pdapi_last_delivered; 981 uint32_t pdapi_ppid; 982 uint32_t context; 983 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 984 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 985 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 986 #ifdef SCTP_ASOCLOG_OF_TSNS 987 /* 988 * special log - This adds considerable size to the asoc, but 989 * provides a log that you can use to detect problems via kgdb. 990 */ 991 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE]; 992 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE]; 993 uint32_t cumack_log[SCTP_TSN_LOG_SIZE]; 994 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE]; 995 uint16_t tsn_in_at; 996 uint16_t tsn_out_at; 997 uint16_t tsn_in_wrapped; 998 uint16_t tsn_out_wrapped; 999 uint16_t cumack_log_at; 1000 uint16_t cumack_log_atsnt; 1001 #endif /* SCTP_ASOCLOG_OF_TSNS */ 1002 #ifdef SCTP_FS_SPEC_LOG 1003 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE]; 1004 uint16_t fs_index; 1005 #endif 1006 1007 /* 1008 * window state information and smallest MTU that I use to bound 1009 * segmentation 1010 */ 1011 uint32_t peers_rwnd; 1012 uint32_t my_rwnd; 1013 uint32_t my_last_reported_rwnd; 1014 uint32_t sctp_frag_point; 1015 1016 uint32_t total_output_queue_size; 1017 1018 uint32_t sb_cc; /* shadow of sb_cc */ 1019 uint32_t sb_send_resv; /* amount reserved on a send */ 1020 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd 1021 * control */ 1022 #ifdef INET6 1023 uint32_t default_flowlabel; 1024 #endif 1025 uint32_t pr_sctp_cnt; 1026 int ctrl_queue_cnt; /* could be removed REM - NO IT CAN'T!! RRS */ 1027 /* 1028 * All outbound datagrams queue into this list from the individual 1029 * stream queue. Here they get assigned a TSN and then await 1030 * sending. The stream seq comes when it is first put in the 1031 * individual str queue 1032 */ 1033 unsigned int stream_queue_cnt; 1034 unsigned int send_queue_cnt; 1035 unsigned int sent_queue_cnt; 1036 unsigned int sent_queue_cnt_removeable; 1037 /* 1038 * Number on sent queue that are marked for retran until this value 1039 * is 0 we only send one packet of retran'ed data. 1040 */ 1041 unsigned int sent_queue_retran_cnt; 1042 1043 unsigned int size_on_reasm_queue; 1044 unsigned int cnt_on_reasm_queue; 1045 unsigned int fwd_tsn_cnt; 1046 /* amount of data (bytes) currently in flight (on all destinations) */ 1047 unsigned int total_flight; 1048 /* Total book size in flight */ 1049 unsigned int total_flight_count; /* count of chunks used with 1050 * book total */ 1051 /* count of destinaton nets and list of destination nets */ 1052 unsigned int numnets; 1053 1054 /* Total error count on this association */ 1055 unsigned int overall_error_count; 1056 1057 unsigned int cnt_msg_on_sb; 1058 1059 /* All stream count of chunks for delivery */ 1060 unsigned int size_on_all_streams; 1061 unsigned int cnt_on_all_streams; 1062 1063 /* Heart Beat delay in ms */ 1064 uint32_t heart_beat_delay; 1065 1066 /* autoclose */ 1067 unsigned int sctp_autoclose_ticks; 1068 1069 /* how many preopen streams we have */ 1070 unsigned int pre_open_streams; 1071 1072 /* How many streams I support coming into me */ 1073 unsigned int max_inbound_streams; 1074 1075 /* the cookie life I award for any cookie, in seconds */ 1076 unsigned int cookie_life; 1077 /* time to delay acks for */ 1078 unsigned int delayed_ack; 1079 unsigned int old_delayed_ack; 1080 unsigned int sack_freq; 1081 unsigned int data_pkts_seen; 1082 1083 unsigned int numduptsns; 1084 int dup_tsns[SCTP_MAX_DUP_TSNS]; 1085 unsigned int initial_init_rto_max; /* initial RTO for INIT's */ 1086 unsigned int initial_rto; /* initial send RTO */ 1087 unsigned int minrto; /* per assoc RTO-MIN */ 1088 unsigned int maxrto; /* per assoc RTO-MAX */ 1089 1090 /* authentication fields */ 1091 sctp_auth_chklist_t *local_auth_chunks; 1092 sctp_auth_chklist_t *peer_auth_chunks; 1093 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 1094 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 1095 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 1096 sctp_authinfo_t authinfo; /* randoms, cached keys */ 1097 /* 1098 * refcnt to block freeing when a sender or receiver is off coping 1099 * user data in. 1100 */ 1101 uint32_t refcnt; 1102 uint32_t chunks_on_out_queue; /* total chunks floating around, 1103 * locked by send socket buffer */ 1104 uint32_t peers_adaptation; 1105 uint32_t default_mtu; 1106 uint16_t peer_hmac_id; /* peer HMAC id to send */ 1107 1108 /* 1109 * Being that we have no bag to collect stale cookies, and that we 1110 * really would not want to anyway.. we will count them in this 1111 * counter. We of course feed them to the pigeons right away (I have 1112 * always thought of pigeons as flying rats). 1113 */ 1114 uint16_t stale_cookie_count; 1115 1116 /* 1117 * For the partial delivery API, if up, invoked this is what last 1118 * TSN I delivered 1119 */ 1120 uint16_t str_of_pdapi; 1121 uint16_t ssn_of_pdapi; 1122 1123 /* counts of actual built streams. Allocation may be more however */ 1124 /* could re-arrange to optimize space here. */ 1125 uint16_t streamincnt; 1126 uint16_t streamoutcnt; 1127 uint16_t strm_realoutsize; 1128 uint16_t strm_pending_add_size; 1129 /* my maximum number of retrans of INIT and SEND */ 1130 /* copied from SCTP but should be individually setable */ 1131 uint16_t max_init_times; 1132 uint16_t max_send_times; 1133 1134 uint16_t def_net_failure; 1135 1136 uint16_t def_net_pf_threshold; 1137 1138 /* 1139 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 1140 * awaiting ACK 1141 */ 1142 uint16_t mapping_array_size; 1143 1144 uint16_t last_strm_seq_delivered; 1145 uint16_t last_strm_no_delivered; 1146 1147 uint16_t last_revoke_count; 1148 int16_t num_send_timers_up; 1149 1150 uint16_t stream_locked_on; 1151 uint16_t ecn_echo_cnt_onq; 1152 1153 uint16_t free_chunk_cnt; 1154 uint8_t stream_locked; 1155 uint8_t authenticated; /* packet authenticated ok */ 1156 /* 1157 * This flag indicates that a SACK need to be sent. Initially this 1158 * is 1 to send the first sACK immediately. 1159 */ 1160 uint8_t send_sack; 1161 1162 /* max burst of new packets into the network */ 1163 uint32_t max_burst; 1164 /* max burst of fast retransmit packets */ 1165 uint32_t fr_max_burst; 1166 1167 uint8_t sat_network; /* RTT is in range of sat net or greater */ 1168 uint8_t sat_network_lockout; /* lockout code */ 1169 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 1170 /* flag goes on when we are doing a partial delivery api */ 1171 uint8_t hb_random_values[4]; 1172 uint8_t fragmented_delivery_inprogress; 1173 uint8_t fragment_flags; 1174 uint8_t last_flags_delivered; 1175 uint8_t hb_ect_randombit; 1176 uint8_t hb_random_idx; 1177 uint8_t default_dscp; 1178 uint8_t asconf_del_pending; /* asconf delete last addr pending */ 1179 uint8_t trigger_reset; 1180 /* 1181 * This value, plus all other ack'd but above cum-ack is added 1182 * together to cross check against the bit that we have yet to 1183 * define (probably in the SACK). When the cum-ack is updated, this 1184 * sum is updated as well. 1185 */ 1186 1187 /* Flags whether an extension is supported or not */ 1188 uint8_t ecn_supported; 1189 uint8_t prsctp_supported; 1190 uint8_t auth_supported; 1191 uint8_t asconf_supported; 1192 uint8_t reconfig_supported; 1193 uint8_t nrsack_supported; 1194 uint8_t pktdrop_supported; 1195 uint8_t idata_supported; 1196 1197 /* Did the peer make the stream config (add out) request */ 1198 uint8_t peer_req_out; 1199 1200 uint8_t local_strreset_support; 1201 uint8_t peer_supports_nat; 1202 1203 struct sctp_scoping scope; 1204 /* flags to handle send alternate net tracking */ 1205 uint8_t used_alt_asconfack; 1206 uint8_t fast_retran_loss_recovery; 1207 uint8_t sat_t3_loss_recovery; 1208 uint8_t dropped_special_cnt; 1209 uint8_t seen_a_sack_this_pkt; 1210 uint8_t stream_reset_outstanding; 1211 uint8_t stream_reset_out_is_outstanding; 1212 uint8_t delayed_connection; 1213 uint8_t ifp_had_enobuf; 1214 uint8_t saw_sack_with_frags; 1215 uint8_t saw_sack_with_nr_frags; 1216 uint8_t in_asocid_hash; 1217 uint8_t assoc_up_sent; 1218 uint8_t adaptation_needed; 1219 uint8_t adaptation_sent; 1220 /* CMT variables */ 1221 uint8_t cmt_dac_pkts_rcvd; 1222 uint8_t sctp_cmt_on_off; 1223 uint8_t iam_blocking; 1224 uint8_t cookie_how[8]; 1225 /* JRS 5/21/07 - CMT PF variable */ 1226 uint8_t sctp_cmt_pf; 1227 uint8_t use_precise_time; 1228 uint64_t sctp_features; 1229 uint32_t max_cwnd; 1230 uint16_t port; /* remote UDP encapsulation port */ 1231 /* 1232 * The mapping array is used to track out of order sequences above 1233 * last_acked_seq. 0 indicates packet missing 1 indicates packet 1234 * rec'd. We slide it up every time we raise last_acked_seq and 0 1235 * trailing locactions out. If I get a TSN above the array 1236 * mappingArraySz, I discard the datagram and let retransmit happen. 1237 */ 1238 uint32_t marked_retrans; 1239 uint32_t timoinit; 1240 uint32_t timodata; 1241 uint32_t timosack; 1242 uint32_t timoshutdown; 1243 uint32_t timoheartbeat; 1244 uint32_t timocookie; 1245 uint32_t timoshutdownack; 1246 struct timeval start_time; 1247 struct timeval discontinuity_time; 1248 uint64_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 1249 uint64_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 1250 }; 1251 1252 #endif 1253