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