1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * a) Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * b) Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #ifndef _NETINET_SCTP_STRUCTS_H_ 39 #define _NETINET_SCTP_STRUCTS_H_ 40 41 #include <netinet/sctp_os.h> 42 #include <netinet/sctp_header.h> 43 #include <netinet/sctp_auth.h> 44 45 struct sctp_timer { 46 sctp_os_timer_t timer; 47 48 int type; 49 /* 50 * Depending on the timer type these will be setup and cast with the 51 * appropriate entity. 52 */ 53 void *ep; 54 void *tcb; 55 void *net; 56 void *vnet; 57 58 /* for sanity checking */ 59 void *self; 60 uint32_t ticks; 61 uint32_t stopped_from; 62 }; 63 64 struct sctp_foo_stuff { 65 struct sctp_inpcb *inp; 66 uint32_t lineno; 67 uint32_t ticks; 68 int updown; 69 }; 70 71 /* 72 * This is the information we track on each interface that we know about from 73 * the distant end. 74 */ 75 TAILQ_HEAD(sctpnetlisthead, sctp_nets); 76 77 struct sctp_stream_reset_list { 78 TAILQ_ENTRY(sctp_stream_reset_list) next_resp; 79 uint32_t seq; 80 uint32_t tsn; 81 uint32_t number_entries; 82 uint16_t list_of_streams[]; 83 }; 84 85 TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list); 86 87 /* 88 * Users of the iterator need to malloc a iterator with a call to 89 * sctp_initiate_iterator(inp_func, assoc_func, inp_func, pcb_flags, pcb_features, 90 * asoc_state, void-ptr-arg, uint32-arg, end_func, inp); 91 * 92 * Use the following two defines if you don't care what pcb flags are on the EP 93 * and/or you don't care what state the association is in. 94 * 95 * Note that if you specify an INP as the last argument then ONLY each 96 * association of that single INP will be executed upon. Note that the pcb 97 * flags STILL apply so if the inp you specify has different pcb_flags then 98 * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to 99 * assure the inp you specify gets treated. 100 */ 101 #define SCTP_PCB_ANY_FLAGS 0x00000000 102 #define SCTP_PCB_ANY_FEATURES 0x00000000 103 #define SCTP_ASOC_ANY_STATE 0x00000000 104 105 typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr, 106 uint32_t val); 107 typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val); 108 typedef void (*end_func) (void *ptr, uint32_t val); 109 110 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 111 /* whats on the mcore control struct */ 112 struct sctp_mcore_queue { 113 TAILQ_ENTRY(sctp_mcore_queue) next; 114 struct vnet *vn; 115 struct mbuf *m; 116 int off; 117 int v6; 118 }; 119 120 TAILQ_HEAD(sctp_mcore_qhead, sctp_mcore_queue); 121 122 struct sctp_mcore_ctrl { 123 SCTP_PROCESS_STRUCT thread_proc; 124 struct sctp_mcore_qhead que; 125 struct mtx core_mtx; 126 struct mtx que_mtx; 127 int running; 128 int cpuid; 129 }; 130 #endif 131 132 struct sctp_iterator { 133 TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr; 134 struct vnet *vn; 135 struct sctp_timer tmr; 136 struct sctp_inpcb *inp; /* current endpoint */ 137 struct sctp_tcb *stcb; /* current* assoc */ 138 struct sctp_inpcb *next_inp; /* special hook to skip to */ 139 asoc_func function_assoc; /* per assoc function */ 140 inp_func function_inp; /* per endpoint function */ 141 inp_func function_inp_end; /* end INP function */ 142 end_func function_atend; /* iterator completion function */ 143 void *pointer; /* pointer for apply func to use */ 144 uint32_t val; /* value for apply func to use */ 145 uint32_t pcb_flags; /* endpoint flags being checked */ 146 uint32_t pcb_features; /* endpoint features being checked */ 147 uint32_t asoc_state; /* assoc state being checked */ 148 uint32_t iterator_flags; 149 uint8_t no_chunk_output; 150 uint8_t done_current_ep; 151 }; 152 153 /* iterator_flags values */ 154 #define SCTP_ITERATOR_DO_ALL_INP 0x00000001 155 #define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002 156 157 TAILQ_HEAD(sctpiterators, sctp_iterator); 158 159 struct sctp_copy_all { 160 struct sctp_inpcb *inp; /* ep */ 161 struct mbuf *m; 162 struct sctp_sndrcvinfo sndrcv; 163 ssize_t sndlen; 164 int cnt_sent; 165 int cnt_failed; 166 }; 167 168 struct sctp_asconf_iterator { 169 struct sctpladdr list_of_work; 170 int cnt; 171 }; 172 173 struct iterator_control { 174 struct mtx ipi_iterator_wq_mtx; 175 struct mtx it_mtx; 176 SCTP_PROCESS_STRUCT thread_proc; 177 struct sctpiterators iteratorhead; 178 struct sctp_iterator *cur_it; 179 uint32_t iterator_running; 180 uint32_t iterator_flags; 181 }; 182 #define SCTP_ITERATOR_STOP_CUR_IT 0x00000004 183 #define SCTP_ITERATOR_STOP_CUR_INP 0x00000008 184 185 struct sctp_net_route { 186 struct nhop_object *ro_nh; 187 struct llentry *ro_lle; 188 char *ro_prepend; 189 uint16_t ro_plen; 190 uint16_t ro_flags; 191 uint16_t ro_mtu; 192 uint16_t spare; 193 union sctp_sockstore _l_addr; /* remote peer addr */ 194 struct sctp_ifa *_s_addr; /* our selected src addr */ 195 }; 196 197 struct htcp { 198 uint16_t alpha; /* Fixed point arith, << 7 */ 199 uint8_t beta; /* Fixed point arith, << 7 */ 200 uint8_t modeswitch; /* Delay modeswitch until we had at least one 201 * congestion event */ 202 uint32_t last_cong; /* Time since last congestion event end */ 203 uint32_t undo_last_cong; 204 uint16_t bytes_acked; 205 uint32_t bytecount; 206 uint32_t minRTT; 207 uint32_t maxRTT; 208 209 uint32_t undo_maxRTT; 210 uint32_t undo_old_maxB; 211 212 /* Bandwidth estimation */ 213 uint32_t minB; 214 uint32_t maxB; 215 uint32_t old_maxB; 216 uint32_t Bi; 217 uint32_t lasttime; 218 }; 219 220 struct rtcc_cc { 221 struct timeval tls; /* The time we started the sending */ 222 uint64_t lbw; /* Our last estimated bw */ 223 uint64_t lbw_rtt; /* RTT at bw estimate */ 224 uint64_t bw_bytes; /* The total bytes since this sending began */ 225 uint64_t bw_tot_time; /* The total time since sending began */ 226 uint64_t new_tot_time; /* temp holding the new value */ 227 uint64_t bw_bytes_at_last_rttc; /* What bw_bytes was at last rtt calc */ 228 uint32_t cwnd_at_bw_set; /* Cwnd at last bw saved - lbw */ 229 uint32_t vol_reduce; /* cnt of voluntary reductions */ 230 uint16_t steady_step; /* The number required to be in steady state */ 231 uint16_t step_cnt; /* The current number */ 232 uint8_t ret_from_eq; /* When all things are equal what do I return 233 * 0/1 - 1 no cc advance */ 234 uint8_t use_dccc_ecn; /* Flag to enable DCCC ECN */ 235 uint8_t tls_needs_set; /* Flag to indicate we need to set tls 0 or 1 236 * means set at send 2 not */ 237 uint8_t last_step_state; /* Last state if steady state stepdown 238 * is on */ 239 uint8_t rtt_set_this_sack; /* Flag saying this sack had RTT calc 240 * on it */ 241 uint8_t last_inst_ind; /* Last saved inst indication */ 242 }; 243 244 struct sctp_nets { 245 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */ 246 247 /* 248 * Things on the top half may be able to be split into a common 249 * structure shared by all. 250 */ 251 struct sctp_timer pmtu_timer; 252 struct sctp_timer hb_timer; 253 254 /* 255 * The following two in combination equate to a route entry for v6 256 * or v4. 257 */ 258 struct sctp_net_route ro; 259 260 /* mtu discovered so far */ 261 uint32_t mtu; 262 uint32_t ssthresh; /* not sure about this one for split */ 263 uint32_t last_cwr_tsn; 264 uint32_t cwr_window_tsn; 265 uint32_t ecn_ce_pkt_cnt; 266 uint32_t lost_cnt; 267 /* smoothed average things for RTT and RTO itself */ 268 int lastsa; 269 int lastsv; 270 uint64_t rtt; /* last measured rtt value in us */ 271 uint32_t RTO; 272 273 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */ 274 struct sctp_timer rxt_timer; 275 276 /* last time in seconds I sent to it */ 277 struct timeval last_sent_time; 278 union cc_control_data { 279 struct htcp htcp_ca; /* JRS - struct used in HTCP algorithm */ 280 struct rtcc_cc rtcc; /* rtcc module cc stuff */ 281 } cc_mod; 282 int ref_count; 283 284 /* Congestion stats per destination */ 285 /* 286 * flight size variables and such, sorry Vern, I could not avoid 287 * this if I wanted performance :> 288 */ 289 uint32_t flight_size; 290 uint32_t cwnd; /* actual cwnd */ 291 uint32_t prev_cwnd; /* cwnd before any processing */ 292 uint32_t ecn_prev_cwnd; /* ECN prev cwnd at first ecn_echo seen in new 293 * window */ 294 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */ 295 /* tracking variables to avoid the aloc/free in sack processing */ 296 unsigned int net_ack; 297 unsigned int net_ack2; 298 299 /* 300 * JRS - 5/8/07 - Variable to track last time a destination was 301 * active for CMT PF 302 */ 303 uint32_t last_active; 304 305 /* 306 * CMT variables (iyengar@cis.udel.edu) 307 */ 308 uint32_t this_sack_highest_newack; /* tracks highest TSN newly 309 * acked for a given dest in 310 * the current SACK. Used in 311 * SFR and HTNA algos */ 312 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected 313 * pseudo-cumack for this destination */ 314 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next 315 * expected pseudo-cumack for this 316 * destination */ 317 318 /* CMT fast recovery variables */ 319 uint32_t fast_recovery_tsn; 320 uint32_t heartbeat_random1; 321 uint32_t heartbeat_random2; 322 #ifdef INET6 323 uint32_t flowlabel; 324 #endif 325 uint8_t dscp; 326 327 struct timeval start_time; /* time when this net was created */ 328 uint32_t marked_retrans; /* number or DATA chunks marked for 329 * timer based retransmissions */ 330 uint32_t marked_fastretrans; 331 uint32_t heart_beat_delay; /* Heart Beat delay in ms */ 332 333 /* if this guy is ok or not ... status */ 334 uint16_t dest_state; 335 /* number of timeouts to consider the destination unreachable */ 336 uint16_t failure_threshold; 337 /* number of timeouts to consider the destination potentially failed */ 338 uint16_t pf_threshold; 339 /* error stats on the destination */ 340 uint16_t error_count; 341 /* UDP port number in case of UDP tunneling */ 342 uint16_t port; 343 344 uint8_t fast_retran_loss_recovery; 345 uint8_t will_exit_fast_recovery; 346 /* Flags that probably can be combined into dest_state */ 347 uint8_t fast_retran_ip; /* fast retransmit in progress */ 348 uint8_t hb_responded; 349 uint8_t saw_newack; /* CMT's SFR algorithm flag */ 350 uint8_t src_addr_selected; /* if we split we move */ 351 uint8_t indx_of_eligible_next_to_use; 352 uint8_t addr_is_local; /* its a local address (if known) could move 353 * in split */ 354 355 /* 356 * CMT variables (iyengar@cis.udel.edu) 357 */ 358 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to 359 * find a new pseudocumack. This flag 360 * is set after a new pseudo-cumack 361 * has been received and indicates 362 * that the sender should find the 363 * next pseudo-cumack expected for 364 * this destination */ 365 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to 366 * find a new rtx-pseudocumack. This 367 * flag is set after a new 368 * rtx-pseudo-cumack has been received 369 * and indicates that the sender 370 * should find the next 371 * rtx-pseudo-cumack expected for this 372 * destination */ 373 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to 374 * indicate if a new pseudo-cumack or 375 * rtx-pseudo-cumack has been received */ 376 uint8_t window_probe; /* Doing a window probe? */ 377 uint8_t RTO_measured; /* Have we done the first measure */ 378 uint8_t last_hs_used; /* index into the last HS table entry we used */ 379 uint8_t lan_type; 380 uint8_t rto_needed; 381 uint32_t flowid; 382 uint8_t flowtype; 383 }; 384 385 struct sctp_data_chunkrec { 386 uint32_t tsn; /* the TSN of this transmit */ 387 uint32_t mid; /* the message identifier of this transmit */ 388 uint16_t sid; /* the stream number of this guy */ 389 uint32_t ppid; 390 uint32_t context; /* from send */ 391 uint32_t cwnd_at_send; 392 /* 393 * part of the Highest sacked algorithm to be able to stroke counts 394 * on ones that are FR'd. 395 */ 396 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 397 struct timeval timetodrop; /* time we drop it from queue */ 398 uint32_t fsn; /* Fragment Sequence Number */ 399 uint8_t doing_fast_retransmit; 400 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 401 * outbound holds sending flags for PR-SCTP. */ 402 uint8_t state_flags; 403 uint8_t chunk_was_revoked; 404 uint8_t fwd_tsn_cnt; 405 }; 406 407 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 408 409 /* The lower byte is used to enumerate PR_SCTP policies */ 410 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 411 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 412 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 413 414 /* The upper byte is used as a bit mask */ 415 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100 416 417 struct chk_id { 418 uint8_t id; 419 uint8_t can_take_data; 420 }; 421 422 struct sctp_tmit_chunk { 423 union { 424 struct sctp_data_chunkrec data; 425 struct chk_id chunk_id; 426 } rec; 427 struct sctp_association *asoc; /* bp to asoc this belongs to */ 428 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 429 struct mbuf *data; /* pointer to mbuf chain of data */ 430 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 431 struct sctp_nets *whoTo; 432 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 433 int32_t sent; /* the send status */ 434 uint16_t snd_count; /* number of times I sent */ 435 uint16_t flags; /* flags, such as FRAGMENT_OK */ 436 uint16_t send_size; 437 uint16_t book_size; 438 uint16_t mbcnt; 439 uint16_t auth_keyid; 440 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */ 441 uint8_t pad_inplace; 442 uint8_t do_rtt; 443 uint8_t book_size_scale; 444 uint8_t no_fr_allowed; 445 uint8_t copy_by_ref; 446 uint8_t window_probe; 447 }; 448 449 struct sctp_queued_to_read { /* sinfo structure Pluse more */ 450 uint16_t sinfo_stream; /* off the wire */ 451 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for 452 * EOR */ 453 uint32_t sinfo_ppid; /* off the wire */ 454 uint32_t sinfo_context; /* pick this up from assoc def context? */ 455 uint32_t sinfo_timetolive; /* not used by kernel */ 456 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */ 457 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */ 458 sctp_assoc_t sinfo_assoc_id; /* our assoc id */ 459 /* Non sinfo stuff */ 460 uint32_t mid; /* Fragment Index */ 461 uint32_t length; /* length of data */ 462 uint32_t held_length; /* length held in sb */ 463 uint32_t top_fsn; /* Highest FSN in queue */ 464 uint32_t fsn_included; /* Highest FSN in *data portion */ 465 struct sctp_nets *whoFrom; /* where it came from */ 466 struct mbuf *data; /* front of the mbuf chain of data with 467 * PKT_HDR */ 468 struct mbuf *tail_mbuf; /* used for multi-part data */ 469 struct mbuf *aux_data; /* used to hold/cache control if o/s does not 470 * take it from us */ 471 struct sctp_tcb *stcb; /* assoc, used for window update */ 472 TAILQ_ENTRY(sctp_queued_to_read) next; 473 TAILQ_ENTRY(sctp_queued_to_read) next_instrm; 474 struct sctpchunk_listhead reasm; 475 uint16_t port_from; 476 uint16_t spec_flags; /* Flags to hold the notification field */ 477 uint8_t do_not_ref_stcb; 478 uint8_t end_added; 479 uint8_t pdapi_aborted; 480 uint8_t pdapi_started; 481 uint8_t some_taken; 482 uint8_t last_frag_seen; 483 uint8_t first_frag_seen; 484 uint8_t on_read_q; 485 uint8_t on_strm_q; 486 }; 487 488 #define SCTP_ON_ORDERED 1 489 #define SCTP_ON_UNORDERED 2 490 491 /* This data structure will be on the outbound 492 * stream queues. Data will be pulled off from 493 * the front of the mbuf data and chunk-ified 494 * by the output routines. We will custom 495 * fit every chunk we pull to the send/sent 496 * queue to make up the next full packet 497 * if we can. An entry cannot be removed 498 * from the stream_out queue until 499 * the msg_is_complete flag is set. This 500 * means at times data/tail_mbuf MIGHT 501 * be NULL.. If that occurs it happens 502 * for one of two reasons. Either the user 503 * is blocked on a send() call and has not 504 * awoken to copy more data down... OR 505 * the user is in the explict MSG_EOR mode 506 * and wrote some data, but has not completed 507 * sending. 508 */ 509 struct sctp_stream_queue_pending { 510 struct mbuf *data; 511 struct mbuf *tail_mbuf; 512 struct timeval ts; 513 struct sctp_nets *net; 514 TAILQ_ENTRY(sctp_stream_queue_pending) next; 515 TAILQ_ENTRY(sctp_stream_queue_pending) ss_next; 516 uint32_t fsn; 517 uint32_t length; 518 uint32_t timetolive; 519 uint32_t ppid; 520 uint32_t context; 521 uint16_t sinfo_flags; 522 uint16_t sid; 523 uint16_t act_flags; 524 uint16_t auth_keyid; 525 uint8_t holds_key_ref; 526 uint8_t msg_is_complete; 527 uint8_t some_taken; 528 uint8_t sender_all_done; 529 uint8_t put_last_out; 530 uint8_t discard_rest; 531 uint8_t processing; 532 }; 533 534 /* 535 * this struct contains info that is used to track inbound stream data and 536 * help with ordering. 537 */ 538 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 539 struct sctp_stream_in { 540 struct sctp_readhead inqueue; 541 struct sctp_readhead uno_inqueue; 542 uint32_t last_mid_delivered; /* used for re-order */ 543 uint16_t sid; 544 uint8_t delivery_started; 545 uint8_t pd_api_started; 546 }; 547 548 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 549 TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending); 550 551 /* Round-robin schedulers */ 552 struct ss_rr { 553 /* next link in wheel */ 554 TAILQ_ENTRY(sctp_stream_out) next_spoke; 555 }; 556 557 /* Priority scheduler */ 558 struct ss_prio { 559 /* next link in wheel */ 560 TAILQ_ENTRY(sctp_stream_out) next_spoke; 561 /* priority id */ 562 uint16_t priority; 563 }; 564 565 /* Fair Bandwidth scheduler */ 566 struct ss_fb { 567 /* next link in wheel */ 568 TAILQ_ENTRY(sctp_stream_out) next_spoke; 569 /* stores message size */ 570 int32_t rounds; 571 }; 572 573 /* 574 * This union holds all data necessary for 575 * different stream schedulers. 576 */ 577 struct scheduling_data { 578 struct sctp_stream_out *locked_on_sending; 579 /* circular looking for output selection */ 580 struct sctp_stream_out *last_out_stream; 581 union { 582 struct sctpwheel_listhead wheel; 583 struct sctplist_listhead list; 584 } out; 585 }; 586 587 /* 588 * This union holds all parameters per stream 589 * necessary for different stream schedulers. 590 */ 591 union scheduling_parameters { 592 struct ss_rr rr; 593 struct ss_prio prio; 594 struct ss_fb fb; 595 }; 596 597 /* States for outgoing streams */ 598 #define SCTP_STREAM_CLOSED 0x00 599 #define SCTP_STREAM_OPENING 0x01 600 #define SCTP_STREAM_OPEN 0x02 601 #define SCTP_STREAM_RESET_PENDING 0x03 602 #define SCTP_STREAM_RESET_IN_FLIGHT 0x04 603 604 #define SCTP_MAX_STREAMS_AT_ONCE_RESET 200 605 606 /* This struct is used to track the traffic on outbound streams */ 607 struct sctp_stream_out { 608 struct sctp_streamhead outqueue; 609 union scheduling_parameters ss_params; 610 uint32_t chunks_on_queues; /* send queue and sent queue */ 611 #if defined(SCTP_DETAILED_STR_STATS) 612 uint32_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 613 uint32_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 614 #else 615 /* Only the aggregation */ 616 uint32_t abandoned_unsent[1]; 617 uint32_t abandoned_sent[1]; 618 #endif 619 /* 620 * For associations using DATA chunks, the lower 16-bit of 621 * next_mid_ordered are used as the next SSN. 622 */ 623 uint32_t next_mid_ordered; 624 uint32_t next_mid_unordered; 625 uint16_t sid; 626 uint8_t last_msg_incomplete; 627 uint8_t state; 628 }; 629 630 /* used to keep track of the addresses yet to try to add/delete */ 631 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 632 struct sctp_asconf_addr { 633 TAILQ_ENTRY(sctp_asconf_addr) next; 634 struct sctp_asconf_addr_param ap; 635 struct sctp_ifa *ifa; /* save the ifa for add/del ip */ 636 uint8_t sent; /* has this been sent yet? */ 637 uint8_t special_del; /* not to be used in lookup */ 638 }; 639 640 struct sctp_scoping { 641 uint8_t ipv4_addr_legal; 642 uint8_t ipv6_addr_legal; 643 uint8_t loopback_scope; 644 uint8_t ipv4_local_scope; 645 uint8_t local_scope; 646 uint8_t site_scope; 647 }; 648 649 #define SCTP_TSN_LOG_SIZE 40 650 651 struct sctp_tsn_log { 652 void *stcb; 653 uint32_t tsn; 654 uint32_t seq; 655 uint16_t strm; 656 uint16_t sz; 657 uint16_t flgs; 658 uint16_t in_pos; 659 uint16_t in_out; 660 uint16_t resv; 661 }; 662 663 #define SCTP_FS_SPEC_LOG_SIZE 200 664 struct sctp_fs_spec_log { 665 uint32_t sent; 666 uint32_t total_flight; 667 uint32_t tsn; 668 uint16_t book; 669 uint8_t incr; 670 uint8_t decr; 671 }; 672 673 /* This struct is here to cut out the compatiabilty 674 * pad that bulks up both the inp and stcb. The non 675 * pad portion MUST stay in complete sync with 676 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added 677 * this must be done here too. 678 */ 679 struct sctp_nonpad_sndrcvinfo { 680 uint16_t sinfo_stream; 681 uint16_t sinfo_ssn; 682 uint16_t sinfo_flags; 683 uint32_t sinfo_ppid; 684 uint32_t sinfo_context; 685 uint32_t sinfo_timetolive; 686 uint32_t sinfo_tsn; 687 uint32_t sinfo_cumtsn; 688 sctp_assoc_t sinfo_assoc_id; 689 uint16_t sinfo_keynumber; 690 uint16_t sinfo_keynumber_valid; 691 }; 692 693 /* 694 * JRS - Structure to hold function pointers to the functions responsible 695 * for congestion control. 696 */ 697 698 struct sctp_cc_functions { 699 void (*sctp_set_initial_cc_param) (struct sctp_tcb *stcb, struct sctp_nets *net); 700 void (*sctp_cwnd_update_after_sack) (struct sctp_tcb *stcb, 701 struct sctp_association *asoc, 702 int accum_moved, int reneged_all, int will_exit); 703 void (*sctp_cwnd_update_exit_pf) (struct sctp_tcb *stcb, struct sctp_nets *net); 704 void (*sctp_cwnd_update_after_fr) (struct sctp_tcb *stcb, 705 struct sctp_association *asoc); 706 void (*sctp_cwnd_update_after_timeout) (struct sctp_tcb *stcb, 707 struct sctp_nets *net); 708 void (*sctp_cwnd_update_after_ecn_echo) (struct sctp_tcb *stcb, 709 struct sctp_nets *net, int in_window, int num_pkt_lost); 710 void (*sctp_cwnd_update_after_packet_dropped) (struct sctp_tcb *stcb, 711 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp, 712 uint32_t *bottle_bw, uint32_t *on_queue); 713 void (*sctp_cwnd_update_after_output) (struct sctp_tcb *stcb, 714 struct sctp_nets *net, int burst_limit); 715 void (*sctp_cwnd_update_packet_transmitted) (struct sctp_tcb *stcb, 716 struct sctp_nets *net); 717 void (*sctp_cwnd_update_tsn_acknowledged) (struct sctp_nets *net, 718 struct sctp_tmit_chunk *); 719 void (*sctp_cwnd_new_transmission_begins) (struct sctp_tcb *stcb, 720 struct sctp_nets *net); 721 void (*sctp_cwnd_prepare_net_for_sack) (struct sctp_tcb *stcb, 722 struct sctp_nets *net); 723 int (*sctp_cwnd_socket_option) (struct sctp_tcb *stcb, int set, struct sctp_cc_option *); 724 void (*sctp_rtt_calculated) (struct sctp_tcb *, struct sctp_nets *, struct timeval *); 725 }; 726 727 /* 728 * RS - Structure to hold function pointers to the functions responsible 729 * for stream scheduling. 730 */ 731 struct sctp_ss_functions { 732 void (*sctp_ss_init) (struct sctp_tcb *stcb, struct sctp_association *asoc, 733 int holds_lock); 734 void (*sctp_ss_clear) (struct sctp_tcb *stcb, struct sctp_association *asoc, 735 int clear_values, int holds_lock); 736 void (*sctp_ss_init_stream) (struct sctp_tcb *stcb, struct sctp_stream_out *strq, struct sctp_stream_out *with_strq); 737 void (*sctp_ss_add_to_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 738 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 739 int (*sctp_ss_is_empty) (struct sctp_tcb *stcb, struct sctp_association *asoc); 740 void (*sctp_ss_remove_from_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 741 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 742 struct sctp_stream_out *(*sctp_ss_select_stream) (struct sctp_tcb *stcb, 743 struct sctp_nets *net, struct sctp_association *asoc); 744 void (*sctp_ss_scheduled) (struct sctp_tcb *stcb, struct sctp_nets *net, 745 struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much); 746 void (*sctp_ss_packet_done) (struct sctp_tcb *stcb, struct sctp_nets *net, 747 struct sctp_association *asoc); 748 int (*sctp_ss_get_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 749 struct sctp_stream_out *strq, uint16_t *value); 750 int (*sctp_ss_set_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 751 struct sctp_stream_out *strq, uint16_t value); 752 int (*sctp_ss_is_user_msgs_incomplete) (struct sctp_tcb *stcb, struct sctp_association *asoc); 753 }; 754 755 /* used to save ASCONF chunks for retransmission */ 756 TAILQ_HEAD(sctp_asconf_head, sctp_asconf); 757 struct sctp_asconf { 758 TAILQ_ENTRY(sctp_asconf) next; 759 uint32_t serial_number; 760 uint16_t snd_count; 761 struct mbuf *data; 762 uint16_t len; 763 }; 764 765 /* used to save ASCONF-ACK chunks for retransmission */ 766 TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack); 767 struct sctp_asconf_ack { 768 TAILQ_ENTRY(sctp_asconf_ack) next; 769 uint32_t serial_number; 770 struct sctp_nets *last_sent_to; 771 struct mbuf *data; 772 uint16_t len; 773 }; 774 775 /* 776 * Here we have information about each individual association that we track. 777 * We probably in production would be more dynamic. But for ease of 778 * implementation we will have a fixed array that we hunt for in a linear 779 * fashion. 780 */ 781 struct sctp_association { 782 /* association state */ 783 int state; 784 785 /* queue of pending addrs to add/delete */ 786 struct sctp_asconf_addrhead asconf_queue; 787 788 struct timeval time_entered; /* time we entered state */ 789 struct timeval time_last_rcvd; 790 struct timeval time_last_sent; 791 struct timeval time_last_sat_advance; 792 struct sctp_nonpad_sndrcvinfo def_send; 793 794 /* timers and such */ 795 struct sctp_timer dack_timer; /* Delayed ack timer */ 796 struct sctp_timer asconf_timer; /* asconf */ 797 struct sctp_timer strreset_timer; /* stream reset */ 798 struct sctp_timer shut_guard_timer; /* shutdown guard */ 799 struct sctp_timer autoclose_timer; /* automatic close timer */ 800 struct sctp_timer delete_prim_timer; /* deleting primary dst */ 801 802 /* list of restricted local addresses */ 803 struct sctpladdr sctp_restricted_addrs; 804 805 /* last local address pending deletion (waiting for an address add) */ 806 struct sctp_ifa *asconf_addr_del_pending; 807 /* Deleted primary destination (used to stop timer) */ 808 struct sctp_nets *deleted_primary; 809 810 struct sctpnetlisthead nets; /* remote address list */ 811 812 /* Free chunk list */ 813 struct sctpchunk_listhead free_chunks; 814 815 /* Control chunk queue */ 816 struct sctpchunk_listhead control_send_queue; 817 818 /* ASCONF chunk queue */ 819 struct sctpchunk_listhead asconf_send_queue; 820 821 /* 822 * Once a TSN hits the wire it is moved to the sent_queue. We 823 * maintain two counts here (don't know if any but retran_cnt is 824 * needed). The idea is that the sent_queue_retran_cnt reflects how 825 * many chunks have been marked for retranmission by either T3-rxt 826 * or FR. 827 */ 828 struct sctpchunk_listhead sent_queue; 829 struct sctpchunk_listhead send_queue; 830 831 /* Scheduling queues */ 832 struct scheduling_data ss_data; 833 834 /* If an iterator is looking at me, this is it */ 835 struct sctp_iterator *stcb_starting_point_for_iterator; 836 837 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 838 struct sctp_asconf_ackhead asconf_ack_sent; 839 840 /* 841 * pointer to last stream reset queued to control queue by us with 842 * requests. 843 */ 844 struct sctp_tmit_chunk *str_reset; 845 /* 846 * if Source Address Selection happening, this will rotate through 847 * the link list. 848 */ 849 struct sctp_laddr *last_used_address; 850 851 /* stream arrays */ 852 struct sctp_stream_in *strmin; 853 struct sctp_stream_out *strmout; 854 uint8_t *mapping_array; 855 /* primary destination to use */ 856 struct sctp_nets *primary_destination; 857 struct sctp_nets *alternate; /* If primary is down or PF */ 858 /* For CMT */ 859 struct sctp_nets *last_net_cmt_send_started; 860 /* last place I got a data chunk from */ 861 struct sctp_nets *last_data_chunk_from; 862 /* last place I got a control from */ 863 struct sctp_nets *last_control_chunk_from; 864 865 /* 866 * wait to the point the cum-ack passes req->send_reset_at_tsn for 867 * any req on the list. 868 */ 869 struct sctp_resethead resetHead; 870 871 /* queue of chunks waiting to be sent into the local stack */ 872 struct sctp_readhead pending_reply_queue; 873 874 /* JRS - the congestion control functions are in this struct */ 875 struct sctp_cc_functions cc_functions; 876 /* 877 * JRS - value to store the currently loaded congestion control 878 * module 879 */ 880 uint32_t congestion_control_module; 881 /* RS - the stream scheduling functions are in this struct */ 882 struct sctp_ss_functions ss_functions; 883 /* RS - value to store the currently loaded stream scheduling module */ 884 uint32_t stream_scheduling_module; 885 886 uint32_t vrf_id; 887 uint32_t cookie_preserve_req; 888 /* ASCONF next seq I am sending out, inits at init-tsn */ 889 uint32_t asconf_seq_out; 890 uint32_t asconf_seq_out_acked; 891 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 892 uint32_t asconf_seq_in; 893 894 /* next seq I am sending in str reset messages */ 895 uint32_t str_reset_seq_out; 896 /* next seq I am expecting in str reset messages */ 897 uint32_t str_reset_seq_in; 898 899 /* various verification tag information */ 900 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 901 * by remote end, and I have unlocked this 902 * will be regenerated to a new random value. */ 903 uint32_t peer_vtag; /* The peers last tag */ 904 905 uint32_t my_vtag_nonce; 906 uint32_t peer_vtag_nonce; 907 908 uint32_t assoc_id; 909 910 /* This is the SCTP fragmentation threshold */ 911 uint32_t smallest_mtu; 912 913 /* 914 * Special hook for Fast retransmit, allows us to track the highest 915 * TSN that is NEW in this SACK if gap ack blocks are present. 916 */ 917 uint32_t this_sack_highest_gap; 918 919 /* 920 * The highest consecutive TSN that has been acked by peer on my 921 * sends 922 */ 923 uint32_t last_acked_seq; 924 925 /* The next TSN that I will use in sending. */ 926 uint32_t sending_seq; 927 928 /* Original seq number I used ??questionable to keep?? */ 929 uint32_t init_seq_number; 930 931 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 932 /* (A1 in Section 4.2) */ 933 uint32_t advanced_peer_ack_point; 934 935 /* 936 * The highest consequetive TSN at the bottom of the mapping array 937 * (for his sends). 938 */ 939 uint32_t cumulative_tsn; 940 /* 941 * Used to track the mapping array and its offset bits. This MAY be 942 * lower then cumulative_tsn. 943 */ 944 uint32_t mapping_array_base_tsn; 945 /* 946 * used to track highest TSN we have received and is listed in the 947 * mapping array. 948 */ 949 uint32_t highest_tsn_inside_map; 950 951 /* EY - new NR variables used for nr_sack based on mapping_array */ 952 uint8_t *nr_mapping_array; 953 uint32_t highest_tsn_inside_nr_map; 954 955 uint32_t fast_recovery_tsn; 956 uint32_t sat_t3_recovery_tsn; 957 uint32_t tsn_last_delivered; 958 /* 959 * For the pd-api we should re-write this a bit more efficient. We 960 * could have multiple sctp_queued_to_read's that we are building at 961 * once. Now we only do this when we get ready to deliver to the 962 * socket buffer. Note that we depend on the fact that the struct is 963 * "stuck" on the read queue until we finish all the pd-api. 964 */ 965 struct sctp_queued_to_read *control_pdapi; 966 967 uint32_t tsn_of_pdapi_last_delivered; 968 uint32_t pdapi_ppid; 969 uint32_t context; 970 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 971 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 972 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 973 #ifdef SCTP_ASOCLOG_OF_TSNS 974 /* 975 * special log - This adds considerable size to the asoc, but 976 * provides a log that you can use to detect problems via kgdb. 977 */ 978 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE]; 979 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE]; 980 uint32_t cumack_log[SCTP_TSN_LOG_SIZE]; 981 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE]; 982 uint16_t tsn_in_at; 983 uint16_t tsn_out_at; 984 uint16_t tsn_in_wrapped; 985 uint16_t tsn_out_wrapped; 986 uint16_t cumack_log_at; 987 uint16_t cumack_log_atsnt; 988 #endif /* SCTP_ASOCLOG_OF_TSNS */ 989 #ifdef SCTP_FS_SPEC_LOG 990 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE]; 991 uint16_t fs_index; 992 #endif 993 994 /* 995 * window state information and smallest MTU that I use to bound 996 * segmentation 997 */ 998 uint32_t peers_rwnd; 999 uint32_t my_rwnd; 1000 uint32_t my_last_reported_rwnd; 1001 uint32_t sctp_frag_point; 1002 1003 uint32_t total_output_queue_size; 1004 1005 uint32_t sb_cc; /* shadow of sb_cc */ 1006 uint32_t sb_send_resv; /* amount reserved on a send */ 1007 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd 1008 * control */ 1009 #ifdef INET6 1010 uint32_t default_flowlabel; 1011 #endif 1012 uint32_t pr_sctp_cnt; 1013 int ctrl_queue_cnt; /* could be removed REM - NO IT CAN'T!! RRS */ 1014 /* 1015 * All outbound datagrams queue into this list from the individual 1016 * stream queue. Here they get assigned a TSN and then await 1017 * sending. The stream seq comes when it is first put in the 1018 * individual str queue 1019 */ 1020 unsigned int stream_queue_cnt; 1021 unsigned int send_queue_cnt; 1022 unsigned int sent_queue_cnt; 1023 unsigned int sent_queue_cnt_removeable; 1024 /* 1025 * Number on sent queue that are marked for retran until this value 1026 * is 0 we only send one packet of retran'ed data. 1027 */ 1028 unsigned int sent_queue_retran_cnt; 1029 1030 unsigned int size_on_reasm_queue; 1031 unsigned int cnt_on_reasm_queue; 1032 unsigned int fwd_tsn_cnt; 1033 /* amount of data (bytes) currently in flight (on all destinations) */ 1034 unsigned int total_flight; 1035 /* Total book size in flight */ 1036 unsigned int total_flight_count; /* count of chunks used with 1037 * book total */ 1038 /* count of destinaton nets and list of destination nets */ 1039 unsigned int numnets; 1040 1041 /* Total error count on this association */ 1042 unsigned int overall_error_count; 1043 1044 unsigned int cnt_msg_on_sb; 1045 1046 /* All stream count of chunks for delivery */ 1047 unsigned int size_on_all_streams; 1048 unsigned int cnt_on_all_streams; 1049 1050 /* Heart Beat delay in ms */ 1051 uint32_t heart_beat_delay; 1052 1053 /* autoclose */ 1054 uint32_t sctp_autoclose_ticks; 1055 1056 /* how many preopen streams we have */ 1057 unsigned int pre_open_streams; 1058 1059 /* How many streams I support coming into me */ 1060 unsigned int max_inbound_streams; 1061 1062 /* the cookie life I award for any cookie, in seconds */ 1063 uint32_t cookie_life; 1064 /* time to delay acks for */ 1065 unsigned int delayed_ack; 1066 unsigned int old_delayed_ack; 1067 unsigned int sack_freq; 1068 unsigned int data_pkts_seen; 1069 1070 unsigned int numduptsns; 1071 int dup_tsns[SCTP_MAX_DUP_TSNS]; 1072 uint32_t initial_init_rto_max; /* initial RTO for INIT's */ 1073 uint32_t initial_rto; /* initial send RTO */ 1074 uint32_t minrto; /* per assoc RTO-MIN */ 1075 uint32_t maxrto; /* per assoc RTO-MAX */ 1076 1077 /* authentication fields */ 1078 sctp_auth_chklist_t *local_auth_chunks; 1079 sctp_auth_chklist_t *peer_auth_chunks; 1080 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 1081 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 1082 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 1083 sctp_authinfo_t authinfo; /* randoms, cached keys */ 1084 /* 1085 * refcnt to block freeing when a sender or receiver is off coping 1086 * user data in. 1087 */ 1088 uint32_t refcnt; 1089 uint32_t chunks_on_out_queue; /* total chunks floating around, 1090 * locked by send socket buffer */ 1091 uint32_t peers_adaptation; 1092 uint32_t default_mtu; 1093 uint16_t peer_hmac_id; /* peer HMAC id to send */ 1094 1095 /* 1096 * Being that we have no bag to collect stale cookies, and that we 1097 * really would not want to anyway.. we will count them in this 1098 * counter. We of course feed them to the pigeons right away (I have 1099 * always thought of pigeons as flying rats). 1100 */ 1101 uint16_t stale_cookie_count; 1102 1103 /* 1104 * For the partial delivery API, if up, invoked this is what last 1105 * TSN I delivered 1106 */ 1107 uint16_t str_of_pdapi; 1108 uint16_t ssn_of_pdapi; 1109 1110 /* counts of actual built streams. Allocation may be more however */ 1111 /* could re-arrange to optimize space here. */ 1112 uint16_t streamincnt; 1113 uint16_t streamoutcnt; 1114 uint16_t strm_realoutsize; 1115 uint16_t strm_pending_add_size; 1116 /* my maximum number of retrans of INIT and SEND */ 1117 /* copied from SCTP but should be individually setable */ 1118 uint16_t max_init_times; 1119 uint16_t max_send_times; 1120 1121 uint16_t def_net_failure; 1122 1123 uint16_t def_net_pf_threshold; 1124 1125 /* 1126 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 1127 * awaiting ACK 1128 */ 1129 uint16_t mapping_array_size; 1130 1131 uint16_t last_strm_seq_delivered; 1132 uint16_t last_strm_no_delivered; 1133 1134 uint16_t last_revoke_count; 1135 int16_t num_send_timers_up; 1136 1137 uint16_t stream_locked_on; 1138 uint16_t ecn_echo_cnt_onq; 1139 1140 uint16_t free_chunk_cnt; 1141 uint8_t stream_locked; 1142 uint8_t authenticated; /* packet authenticated ok */ 1143 /* 1144 * This flag indicates that a SACK need to be sent. Initially this 1145 * is 1 to send the first sACK immediately. 1146 */ 1147 uint8_t send_sack; 1148 1149 /* max burst of new packets into the network */ 1150 uint32_t max_burst; 1151 /* max burst of fast retransmit packets */ 1152 uint32_t fr_max_burst; 1153 1154 uint8_t sat_network; /* RTT is in range of sat net or greater */ 1155 uint8_t sat_network_lockout; /* lockout code */ 1156 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 1157 /* flag goes on when we are doing a partial delivery api */ 1158 uint8_t hb_random_values[4]; 1159 uint8_t fragmented_delivery_inprogress; 1160 uint8_t fragment_flags; 1161 uint8_t last_flags_delivered; 1162 uint8_t hb_ect_randombit; 1163 uint8_t hb_random_idx; 1164 uint8_t default_dscp; 1165 uint8_t asconf_del_pending; /* asconf delete last addr pending */ 1166 uint8_t trigger_reset; 1167 /* 1168 * This value, plus all other ack'd but above cum-ack is added 1169 * together to cross check against the bit that we have yet to 1170 * define (probably in the SACK). When the cum-ack is updated, this 1171 * sum is updated as well. 1172 */ 1173 1174 /* Flags whether an extension is supported or not */ 1175 uint8_t ecn_supported; 1176 uint8_t prsctp_supported; 1177 uint8_t auth_supported; 1178 uint8_t asconf_supported; 1179 uint8_t reconfig_supported; 1180 uint8_t nrsack_supported; 1181 uint8_t pktdrop_supported; 1182 uint8_t idata_supported; 1183 1184 /* Did the peer make the stream config (add out) request */ 1185 uint8_t peer_req_out; 1186 1187 uint8_t local_strreset_support; 1188 uint8_t peer_supports_nat; 1189 1190 struct sctp_scoping scope; 1191 /* flags to handle send alternate net tracking */ 1192 uint8_t used_alt_asconfack; 1193 uint8_t fast_retran_loss_recovery; 1194 uint8_t sat_t3_loss_recovery; 1195 uint8_t dropped_special_cnt; 1196 uint8_t seen_a_sack_this_pkt; 1197 uint8_t stream_reset_outstanding; 1198 uint8_t stream_reset_out_is_outstanding; 1199 uint8_t delayed_connection; 1200 uint8_t ifp_had_enobuf; 1201 uint8_t saw_sack_with_frags; 1202 uint8_t saw_sack_with_nr_frags; 1203 uint8_t in_asocid_hash; 1204 uint8_t assoc_up_sent; 1205 uint8_t adaptation_needed; 1206 uint8_t adaptation_sent; 1207 /* CMT variables */ 1208 uint8_t cmt_dac_pkts_rcvd; 1209 uint8_t sctp_cmt_on_off; 1210 uint8_t iam_blocking; 1211 uint8_t cookie_how[8]; 1212 /* JRS 5/21/07 - CMT PF variable */ 1213 uint8_t sctp_cmt_pf; 1214 uint8_t use_precise_time; 1215 uint64_t sctp_features; 1216 uint32_t max_cwnd; 1217 uint16_t port; /* remote UDP encapsulation port */ 1218 /* 1219 * The mapping array is used to track out of order sequences above 1220 * last_acked_seq. 0 indicates packet missing 1 indicates packet 1221 * rec'd. We slide it up every time we raise last_acked_seq and 0 1222 * trailing locactions out. If I get a TSN above the array 1223 * mappingArraySz, I discard the datagram and let retransmit happen. 1224 */ 1225 uint32_t marked_retrans; 1226 uint32_t timoinit; 1227 uint32_t timodata; 1228 uint32_t timosack; 1229 uint32_t timoshutdown; 1230 uint32_t timoheartbeat; 1231 uint32_t timocookie; 1232 uint32_t timoshutdownack; 1233 struct timeval start_time; 1234 struct timeval discontinuity_time; 1235 uint64_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 1236 uint64_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 1237 }; 1238 1239 #endif 1240