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 #ifdef __FreeBSD__ 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD: head/sys/netinet/sctp_structs.h 360292 2020-04-25 09:06:11Z melifaro $"); 38 #endif 39 40 #ifndef _NETINET_SCTP_STRUCTS_H_ 41 #define _NETINET_SCTP_STRUCTS_H_ 42 43 #include <netinet/sctp_os.h> 44 #include <netinet/sctp_header.h> 45 #include <netinet/sctp_auth.h> 46 47 struct sctp_timer { 48 sctp_os_timer_t timer; 49 50 int type; 51 /* 52 * Depending on the timer type these will be setup and cast with the 53 * appropriate entity. 54 */ 55 void *ep; 56 void *tcb; 57 void *net; 58 #if defined(__FreeBSD__) && __FreeBSD_version >= 800000 59 void *vnet; 60 #endif 61 62 /* for sanity checking */ 63 void *self; 64 uint32_t ticks; 65 uint32_t stopped_from; 66 }; 67 68 69 struct sctp_foo_stuff { 70 struct sctp_inpcb *inp; 71 uint32_t lineno; 72 uint32_t ticks; 73 int updown; 74 }; 75 76 77 /* 78 * This is the information we track on each interface that we know about from 79 * the distant end. 80 */ 81 TAILQ_HEAD(sctpnetlisthead, sctp_nets); 82 83 struct sctp_stream_reset_list { 84 TAILQ_ENTRY(sctp_stream_reset_list) next_resp; 85 uint32_t seq; 86 uint32_t tsn; 87 uint32_t number_entries; 88 uint16_t list_of_streams[]; 89 }; 90 91 TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list); 92 93 /* 94 * Users of the iterator need to malloc a iterator with a call to 95 * sctp_initiate_iterator(inp_func, assoc_func, inp_func, pcb_flags, pcb_features, 96 * asoc_state, void-ptr-arg, uint32-arg, end_func, inp); 97 * 98 * Use the following two defines if you don't care what pcb flags are on the EP 99 * and/or you don't care what state the association is in. 100 * 101 * Note that if you specify an INP as the last argument then ONLY each 102 * association of that single INP will be executed upon. Note that the pcb 103 * flags STILL apply so if the inp you specify has different pcb_flags then 104 * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to 105 * assure the inp you specify gets treated. 106 */ 107 #define SCTP_PCB_ANY_FLAGS 0x00000000 108 #define SCTP_PCB_ANY_FEATURES 0x00000000 109 #define SCTP_ASOC_ANY_STATE 0x00000000 110 111 typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr, 112 uint32_t val); 113 typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val); 114 typedef void (*end_func) (void *ptr, uint32_t val); 115 116 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 117 /* whats on the mcore control struct */ 118 struct sctp_mcore_queue { 119 TAILQ_ENTRY(sctp_mcore_queue) next; 120 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000 121 struct vnet *vn; 122 #endif 123 struct mbuf *m; 124 int off; 125 int v6; 126 }; 127 128 TAILQ_HEAD(sctp_mcore_qhead, sctp_mcore_queue); 129 130 struct sctp_mcore_ctrl { 131 SCTP_PROCESS_STRUCT thread_proc; 132 struct sctp_mcore_qhead que; 133 struct mtx core_mtx; 134 struct mtx que_mtx; 135 int running; 136 int cpuid; 137 }; 138 139 140 #endif 141 142 143 struct sctp_iterator { 144 TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr; 145 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000 146 struct vnet *vn; 147 #endif 148 struct sctp_timer tmr; 149 struct sctp_inpcb *inp; /* current endpoint */ 150 struct sctp_tcb *stcb; /* current* assoc */ 151 struct sctp_inpcb *next_inp; /* special hook to skip to */ 152 asoc_func function_assoc; /* per assoc function */ 153 inp_func function_inp; /* per endpoint function */ 154 inp_func function_inp_end; /* end INP function */ 155 end_func function_atend; /* iterator completion function */ 156 void *pointer; /* pointer for apply func to use */ 157 uint32_t val; /* value for apply func to use */ 158 uint32_t pcb_flags; /* endpoint flags being checked */ 159 uint32_t pcb_features; /* endpoint features being checked */ 160 uint32_t asoc_state; /* assoc state being checked */ 161 uint32_t iterator_flags; 162 uint8_t no_chunk_output; 163 uint8_t done_current_ep; 164 }; 165 /* iterator_flags values */ 166 #define SCTP_ITERATOR_DO_ALL_INP 0x00000001 167 #define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002 168 169 170 TAILQ_HEAD(sctpiterators, sctp_iterator); 171 172 struct sctp_copy_all { 173 struct sctp_inpcb *inp; /* ep */ 174 struct mbuf *m; 175 struct sctp_sndrcvinfo sndrcv; 176 ssize_t sndlen; 177 int cnt_sent; 178 int cnt_failed; 179 }; 180 181 struct sctp_asconf_iterator { 182 struct sctpladdr list_of_work; 183 int cnt; 184 }; 185 186 struct iterator_control { 187 #if defined(__FreeBSD__) 188 struct mtx ipi_iterator_wq_mtx; 189 struct mtx it_mtx; 190 #elif defined(__APPLE__) 191 lck_mtx_t *ipi_iterator_wq_mtx; 192 lck_mtx_t *it_mtx; 193 #elif defined(SCTP_PROCESS_LEVEL_LOCKS) 194 #if defined(__Userspace__) 195 userland_mutex_t ipi_iterator_wq_mtx; 196 userland_mutex_t it_mtx; 197 userland_cond_t iterator_wakeup; 198 #else 199 pthread_mutex_t ipi_iterator_wq_mtx; 200 pthread_mutex_t it_mtx; 201 pthread_cond_t iterator_wakeup; 202 #endif 203 #elif defined(__Windows__) 204 struct spinlock it_lock; 205 struct spinlock ipi_iterator_wq_lock; 206 KEVENT iterator_wakeup[2]; 207 PFILE_OBJECT iterator_thread_obj; 208 #else 209 void *it_mtx; 210 #endif 211 #if !defined(__Windows__) 212 #if !defined(__Userspace__) 213 SCTP_PROCESS_STRUCT thread_proc; 214 #else 215 userland_thread_t thread_proc; 216 #endif 217 #endif 218 struct sctpiterators iteratorhead; 219 struct sctp_iterator *cur_it; 220 uint32_t iterator_running; 221 uint32_t iterator_flags; 222 }; 223 #if !defined(__FreeBSD__) 224 #define SCTP_ITERATOR_MUST_EXIT 0x00000001 225 #define SCTP_ITERATOR_EXITED 0x00000002 226 #endif 227 #define SCTP_ITERATOR_STOP_CUR_IT 0x00000004 228 #define SCTP_ITERATOR_STOP_CUR_INP 0x00000008 229 230 struct sctp_net_route { 231 #if defined(__FreeBSD__) 232 struct nhop_object *ro_nh; 233 struct llentry *ro_lle; 234 char *ro_prepend; 235 uint16_t ro_plen; 236 uint16_t ro_flags; 237 uint16_t ro_mtu; 238 uint16_t spare; 239 #else 240 sctp_rtentry_t *ro_rt; 241 #endif 242 #if defined(__APPLE__) 243 #if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION) && !defined(APPLE_ELCAPITAN) 244 struct llentry *ro_lle; 245 #endif 246 #if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION) 247 struct ifaddr *ro_srcia; 248 #endif 249 #if !defined(APPLE_LEOPARD) 250 uint32_t ro_flags; 251 #endif 252 #endif 253 union sctp_sockstore _l_addr; /* remote peer addr */ 254 struct sctp_ifa *_s_addr; /* our selected src addr */ 255 }; 256 257 struct htcp { 258 uint16_t alpha; /* Fixed point arith, << 7 */ 259 uint8_t beta; /* Fixed point arith, << 7 */ 260 uint8_t modeswitch; /* Delay modeswitch until we had at least one congestion event */ 261 uint32_t last_cong; /* Time since last congestion event end */ 262 uint32_t undo_last_cong; 263 uint16_t bytes_acked; 264 uint32_t bytecount; 265 uint32_t minRTT; 266 uint32_t maxRTT; 267 268 uint32_t undo_maxRTT; 269 uint32_t undo_old_maxB; 270 271 /* Bandwidth estimation */ 272 uint32_t minB; 273 uint32_t maxB; 274 uint32_t old_maxB; 275 uint32_t Bi; 276 uint32_t lasttime; 277 }; 278 279 struct rtcc_cc { 280 struct timeval tls; /* The time we started the sending */ 281 uint64_t lbw; /* Our last estimated bw */ 282 uint64_t lbw_rtt; /* RTT at bw estimate */ 283 uint64_t bw_bytes; /* The total bytes since this sending began */ 284 uint64_t bw_tot_time; /* The total time since sending began */ 285 uint64_t new_tot_time; /* temp holding the new value */ 286 uint64_t bw_bytes_at_last_rttc; /* What bw_bytes was at last rtt calc */ 287 uint32_t cwnd_at_bw_set; /* Cwnd at last bw saved - lbw */ 288 uint32_t vol_reduce; /* cnt of voluntary reductions */ 289 uint16_t steady_step; /* The number required to be in steady state*/ 290 uint16_t step_cnt; /* The current number */ 291 uint8_t ret_from_eq; /* When all things are equal what do I return 0/1 - 1 no cc advance */ 292 uint8_t use_dccc_ecn; /* Flag to enable DCCC ECN */ 293 uint8_t tls_needs_set; /* Flag to indicate we need to set tls 0 or 1 means set at send 2 not */ 294 uint8_t last_step_state; /* Last state if steady state stepdown is on */ 295 uint8_t rtt_set_this_sack; /* Flag saying this sack had RTT calc on it */ 296 uint8_t last_inst_ind; /* Last saved inst indication */ 297 }; 298 299 300 struct sctp_nets { 301 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */ 302 303 /* 304 * Things on the top half may be able to be split into a common 305 * structure shared by all. 306 */ 307 struct sctp_timer pmtu_timer; 308 struct sctp_timer hb_timer; 309 310 /* 311 * The following two in combination equate to a route entry for v6 312 * or v4. 313 */ 314 struct sctp_net_route ro; 315 316 /* mtu discovered so far */ 317 uint32_t mtu; 318 uint32_t ssthresh; /* not sure about this one for split */ 319 uint32_t last_cwr_tsn; 320 uint32_t cwr_window_tsn; 321 uint32_t ecn_ce_pkt_cnt; 322 uint32_t lost_cnt; 323 /* smoothed average things for RTT and RTO itself */ 324 int lastsa; 325 int lastsv; 326 uint64_t rtt; /* last measured rtt value in us */ 327 uint32_t RTO; 328 329 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */ 330 struct sctp_timer rxt_timer; 331 332 /* last time in seconds I sent to it */ 333 struct timeval last_sent_time; 334 union cc_control_data { 335 struct htcp htcp_ca; /* JRS - struct used in HTCP algorithm */ 336 struct rtcc_cc rtcc; /* rtcc module cc stuff */ 337 } cc_mod; 338 int ref_count; 339 340 /* Congestion stats per destination */ 341 /* 342 * flight size variables and such, sorry Vern, I could not avoid 343 * this if I wanted performance :> 344 */ 345 uint32_t flight_size; 346 uint32_t cwnd; /* actual cwnd */ 347 uint32_t prev_cwnd; /* cwnd before any processing */ 348 uint32_t ecn_prev_cwnd; /* ECN prev cwnd at first ecn_echo seen in new window */ 349 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */ 350 /* tracking variables to avoid the aloc/free in sack processing */ 351 unsigned int net_ack; 352 unsigned int net_ack2; 353 354 /* 355 * JRS - 5/8/07 - Variable to track last time 356 * a destination was active for CMT PF 357 */ 358 uint32_t last_active; 359 360 /* 361 * CMT variables (iyengar@cis.udel.edu) 362 */ 363 uint32_t this_sack_highest_newack; /* tracks highest TSN newly 364 * acked for a given dest in 365 * the current SACK. Used in 366 * SFR and HTNA algos */ 367 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected 368 * pseudo-cumack for this destination */ 369 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next 370 * expected pseudo-cumack for this 371 * destination */ 372 373 /* CMT fast recovery variables */ 374 uint32_t fast_recovery_tsn; 375 uint32_t heartbeat_random1; 376 uint32_t heartbeat_random2; 377 #ifdef INET6 378 uint32_t flowlabel; 379 #endif 380 uint8_t dscp; 381 382 struct timeval start_time; /* time when this net was created */ 383 uint32_t marked_retrans; /* number or DATA chunks marked for 384 timer based retransmissions */ 385 uint32_t marked_fastretrans; 386 uint32_t heart_beat_delay; /* Heart Beat delay in ms */ 387 388 /* if this guy is ok or not ... status */ 389 uint16_t dest_state; 390 /* number of timeouts to consider the destination unreachable */ 391 uint16_t failure_threshold; 392 /* number of timeouts to consider the destination potentially failed */ 393 uint16_t pf_threshold; 394 /* error stats on the destination */ 395 uint16_t error_count; 396 /* UDP port number in case of UDP tunneling */ 397 uint16_t port; 398 399 uint8_t fast_retran_loss_recovery; 400 uint8_t will_exit_fast_recovery; 401 /* Flags that probably can be combined into dest_state */ 402 uint8_t fast_retran_ip; /* fast retransmit in progress */ 403 uint8_t hb_responded; 404 uint8_t saw_newack; /* CMT's SFR algorithm flag */ 405 uint8_t src_addr_selected; /* if we split we move */ 406 uint8_t indx_of_eligible_next_to_use; 407 uint8_t addr_is_local; /* its a local address (if known) could move 408 * in split */ 409 410 /* 411 * CMT variables (iyengar@cis.udel.edu) 412 */ 413 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to 414 * find a new pseudocumack. This flag 415 * is set after a new pseudo-cumack 416 * has been received and indicates 417 * that the sender should find the 418 * next pseudo-cumack expected for 419 * this destination */ 420 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to 421 * find a new rtx-pseudocumack. This 422 * flag is set after a new 423 * rtx-pseudo-cumack has been received 424 * and indicates that the sender 425 * should find the next 426 * rtx-pseudo-cumack expected for this 427 * destination */ 428 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to 429 * indicate if a new pseudo-cumack or 430 * rtx-pseudo-cumack has been received */ 431 uint8_t window_probe; /* Doing a window probe? */ 432 uint8_t RTO_measured; /* Have we done the first measure */ 433 uint8_t last_hs_used; /* index into the last HS table entry we used */ 434 uint8_t lan_type; 435 uint8_t rto_needed; 436 #if defined(__FreeBSD__) 437 uint32_t flowid; 438 uint8_t flowtype; 439 #endif 440 }; 441 442 443 struct sctp_data_chunkrec { 444 uint32_t tsn; /* the TSN of this transmit */ 445 uint32_t mid; /* the message identifier of this transmit */ 446 uint16_t sid; /* the stream number of this guy */ 447 uint32_t ppid; 448 uint32_t context; /* from send */ 449 uint32_t cwnd_at_send; 450 /* 451 * part of the Highest sacked algorithm to be able to stroke counts 452 * on ones that are FR'd. 453 */ 454 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 455 struct timeval timetodrop; /* time we drop it from queue */ 456 uint32_t fsn; /* Fragment Sequence Number */ 457 uint8_t doing_fast_retransmit; 458 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 459 * outbound holds sending flags for PR-SCTP. 460 */ 461 uint8_t state_flags; 462 uint8_t chunk_was_revoked; 463 uint8_t fwd_tsn_cnt; 464 }; 465 466 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 467 468 /* The lower byte is used to enumerate PR_SCTP policies */ 469 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 470 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 471 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 472 473 /* The upper byte is used as a bit mask */ 474 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100 475 476 struct chk_id { 477 uint8_t id; 478 uint8_t can_take_data; 479 }; 480 481 482 struct sctp_tmit_chunk { 483 union { 484 struct sctp_data_chunkrec data; 485 struct chk_id chunk_id; 486 } rec; 487 struct sctp_association *asoc; /* bp to asoc this belongs to */ 488 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 489 struct mbuf *data; /* pointer to mbuf chain of data */ 490 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 491 struct sctp_nets *whoTo; 492 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 493 int32_t sent; /* the send status */ 494 uint16_t snd_count; /* number of times I sent */ 495 uint16_t flags; /* flags, such as FRAGMENT_OK */ 496 uint16_t send_size; 497 uint16_t book_size; 498 uint16_t mbcnt; 499 uint16_t auth_keyid; 500 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */ 501 uint8_t pad_inplace; 502 uint8_t do_rtt; 503 uint8_t book_size_scale; 504 uint8_t no_fr_allowed; 505 uint8_t copy_by_ref; 506 uint8_t window_probe; 507 }; 508 509 struct sctp_queued_to_read { /* sinfo structure Pluse more */ 510 uint16_t sinfo_stream; /* off the wire */ 511 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for 512 * EOR */ 513 uint32_t sinfo_ppid; /* off the wire */ 514 uint32_t sinfo_context; /* pick this up from assoc def context? */ 515 uint32_t sinfo_timetolive; /* not used by kernel */ 516 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */ 517 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */ 518 sctp_assoc_t sinfo_assoc_id; /* our assoc id */ 519 /* Non sinfo stuff */ 520 uint32_t mid; /* Fragment Index */ 521 uint32_t length; /* length of data */ 522 uint32_t held_length; /* length held in sb */ 523 uint32_t top_fsn; /* Highest FSN in queue */ 524 uint32_t fsn_included; /* Highest FSN in *data portion */ 525 struct sctp_nets *whoFrom; /* where it came from */ 526 struct mbuf *data; /* front of the mbuf chain of data with 527 * PKT_HDR */ 528 struct mbuf *tail_mbuf; /* used for multi-part data */ 529 struct mbuf *aux_data; /* used to hold/cache control if o/s does not take it from us */ 530 struct sctp_tcb *stcb; /* assoc, used for window update */ 531 TAILQ_ENTRY(sctp_queued_to_read) next; 532 TAILQ_ENTRY(sctp_queued_to_read) next_instrm; 533 struct sctpchunk_listhead reasm; 534 uint16_t port_from; 535 uint16_t spec_flags; /* Flags to hold the notification field */ 536 uint8_t do_not_ref_stcb; 537 uint8_t end_added; 538 uint8_t pdapi_aborted; 539 uint8_t pdapi_started; 540 uint8_t some_taken; 541 uint8_t last_frag_seen; 542 uint8_t first_frag_seen; 543 uint8_t on_read_q; 544 uint8_t on_strm_q; 545 }; 546 547 #define SCTP_ON_ORDERED 1 548 #define SCTP_ON_UNORDERED 2 549 550 /* This data structure will be on the outbound 551 * stream queues. Data will be pulled off from 552 * the front of the mbuf data and chunk-ified 553 * by the output routines. We will custom 554 * fit every chunk we pull to the send/sent 555 * queue to make up the next full packet 556 * if we can. An entry cannot be removed 557 * from the stream_out queue until 558 * the msg_is_complete flag is set. This 559 * means at times data/tail_mbuf MIGHT 560 * be NULL.. If that occurs it happens 561 * for one of two reasons. Either the user 562 * is blocked on a send() call and has not 563 * awoken to copy more data down... OR 564 * the user is in the explict MSG_EOR mode 565 * and wrote some data, but has not completed 566 * sending. 567 */ 568 struct sctp_stream_queue_pending { 569 struct mbuf *data; 570 struct mbuf *tail_mbuf; 571 struct timeval ts; 572 struct sctp_nets *net; 573 TAILQ_ENTRY (sctp_stream_queue_pending) next; 574 TAILQ_ENTRY (sctp_stream_queue_pending) ss_next; 575 uint32_t fsn; 576 uint32_t length; 577 uint32_t timetolive; 578 uint32_t ppid; 579 uint32_t context; 580 uint16_t sinfo_flags; 581 uint16_t sid; 582 uint16_t act_flags; 583 uint16_t auth_keyid; 584 uint8_t holds_key_ref; 585 uint8_t msg_is_complete; 586 uint8_t some_taken; 587 uint8_t sender_all_done; 588 uint8_t put_last_out; 589 uint8_t discard_rest; 590 }; 591 592 /* 593 * this struct contains info that is used to track inbound stream data and 594 * help with ordering. 595 */ 596 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 597 struct sctp_stream_in { 598 struct sctp_readhead inqueue; 599 struct sctp_readhead uno_inqueue; 600 uint32_t last_mid_delivered; /* used for re-order */ 601 uint16_t sid; 602 uint8_t delivery_started; 603 uint8_t pd_api_started; 604 }; 605 606 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 607 TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending); 608 609 610 /* Round-robin schedulers */ 611 struct ss_rr { 612 /* next link in wheel */ 613 TAILQ_ENTRY(sctp_stream_out) next_spoke; 614 }; 615 616 /* Priority scheduler */ 617 struct ss_prio { 618 /* next link in wheel */ 619 TAILQ_ENTRY(sctp_stream_out) next_spoke; 620 /* priority id */ 621 uint16_t priority; 622 }; 623 624 /* Fair Bandwidth scheduler */ 625 struct ss_fb { 626 /* next link in wheel */ 627 TAILQ_ENTRY(sctp_stream_out) next_spoke; 628 /* stores message size */ 629 int32_t rounds; 630 }; 631 632 /* 633 * This union holds all data necessary for 634 * different stream schedulers. 635 */ 636 struct scheduling_data { 637 struct sctp_stream_out *locked_on_sending; 638 /* circular looking for output selection */ 639 struct sctp_stream_out *last_out_stream; 640 union { 641 struct sctpwheel_listhead wheel; 642 struct sctplist_listhead list; 643 } out; 644 }; 645 646 /* 647 * This union holds all parameters per stream 648 * necessary for different stream schedulers. 649 */ 650 union scheduling_parameters { 651 struct ss_rr rr; 652 struct ss_prio prio; 653 struct ss_fb fb; 654 }; 655 656 /* States for outgoing streams */ 657 #define SCTP_STREAM_CLOSED 0x00 658 #define SCTP_STREAM_OPENING 0x01 659 #define SCTP_STREAM_OPEN 0x02 660 #define SCTP_STREAM_RESET_PENDING 0x03 661 #define SCTP_STREAM_RESET_IN_FLIGHT 0x04 662 663 #define SCTP_MAX_STREAMS_AT_ONCE_RESET 200 664 665 /* This struct is used to track the traffic on outbound streams */ 666 struct sctp_stream_out { 667 struct sctp_streamhead outqueue; 668 union scheduling_parameters ss_params; 669 uint32_t chunks_on_queues; /* send queue and sent queue */ 670 #if defined(SCTP_DETAILED_STR_STATS) 671 uint32_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 672 uint32_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 673 #else 674 /* Only the aggregation */ 675 uint32_t abandoned_unsent[1]; 676 uint32_t abandoned_sent[1]; 677 #endif 678 /* For associations using DATA chunks, the lower 16-bit of 679 * next_mid_ordered are used as the next SSN. 680 */ 681 uint32_t next_mid_ordered; 682 uint32_t next_mid_unordered; 683 uint16_t sid; 684 uint8_t last_msg_incomplete; 685 uint8_t state; 686 }; 687 688 /* used to keep track of the addresses yet to try to add/delete */ 689 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 690 struct sctp_asconf_addr { 691 TAILQ_ENTRY(sctp_asconf_addr) next; 692 struct sctp_asconf_addr_param ap; 693 struct sctp_ifa *ifa; /* save the ifa for add/del ip */ 694 uint8_t sent; /* has this been sent yet? */ 695 uint8_t special_del; /* not to be used in lookup */ 696 }; 697 698 struct sctp_scoping { 699 uint8_t ipv4_addr_legal; 700 uint8_t ipv6_addr_legal; 701 #if defined(__Userspace__) 702 uint8_t conn_addr_legal; 703 #endif 704 uint8_t loopback_scope; 705 uint8_t ipv4_local_scope; 706 uint8_t local_scope; 707 uint8_t site_scope; 708 }; 709 710 #define SCTP_TSN_LOG_SIZE 40 711 712 struct sctp_tsn_log { 713 void *stcb; 714 uint32_t tsn; 715 uint32_t seq; 716 uint16_t strm; 717 uint16_t sz; 718 uint16_t flgs; 719 uint16_t in_pos; 720 uint16_t in_out; 721 uint16_t resv; 722 }; 723 724 #define SCTP_FS_SPEC_LOG_SIZE 200 725 struct sctp_fs_spec_log { 726 uint32_t sent; 727 uint32_t total_flight; 728 uint32_t tsn; 729 uint16_t book; 730 uint8_t incr; 731 uint8_t decr; 732 }; 733 734 /* This struct is here to cut out the compatiabilty 735 * pad that bulks up both the inp and stcb. The non 736 * pad portion MUST stay in complete sync with 737 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added 738 * this must be done here too. 739 */ 740 struct sctp_nonpad_sndrcvinfo { 741 uint16_t sinfo_stream; 742 uint16_t sinfo_ssn; 743 uint16_t sinfo_flags; 744 uint32_t sinfo_ppid; 745 uint32_t sinfo_context; 746 uint32_t sinfo_timetolive; 747 uint32_t sinfo_tsn; 748 uint32_t sinfo_cumtsn; 749 sctp_assoc_t sinfo_assoc_id; 750 uint16_t sinfo_keynumber; 751 uint16_t sinfo_keynumber_valid; 752 }; 753 754 /* 755 * JRS - Structure to hold function pointers to the functions responsible 756 * for congestion control. 757 */ 758 759 struct sctp_cc_functions { 760 void (*sctp_set_initial_cc_param)(struct sctp_tcb *stcb, struct sctp_nets *net); 761 void (*sctp_cwnd_update_after_sack)(struct sctp_tcb *stcb, 762 struct sctp_association *asoc, 763 int accum_moved ,int reneged_all, int will_exit); 764 void (*sctp_cwnd_update_exit_pf)(struct sctp_tcb *stcb, struct sctp_nets *net); 765 void (*sctp_cwnd_update_after_fr)(struct sctp_tcb *stcb, 766 struct sctp_association *asoc); 767 void (*sctp_cwnd_update_after_timeout)(struct sctp_tcb *stcb, 768 struct sctp_nets *net); 769 void (*sctp_cwnd_update_after_ecn_echo)(struct sctp_tcb *stcb, 770 struct sctp_nets *net, int in_window, int num_pkt_lost); 771 void (*sctp_cwnd_update_after_packet_dropped)(struct sctp_tcb *stcb, 772 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp, 773 uint32_t *bottle_bw, uint32_t *on_queue); 774 void (*sctp_cwnd_update_after_output)(struct sctp_tcb *stcb, 775 struct sctp_nets *net, int burst_limit); 776 void (*sctp_cwnd_update_packet_transmitted)(struct sctp_tcb *stcb, 777 struct sctp_nets *net); 778 void (*sctp_cwnd_update_tsn_acknowledged)(struct sctp_nets *net, 779 struct sctp_tmit_chunk *); 780 void (*sctp_cwnd_new_transmission_begins)(struct sctp_tcb *stcb, 781 struct sctp_nets *net); 782 void (*sctp_cwnd_prepare_net_for_sack)(struct sctp_tcb *stcb, 783 struct sctp_nets *net); 784 int (*sctp_cwnd_socket_option)(struct sctp_tcb *stcb, int set, struct sctp_cc_option *); 785 void (*sctp_rtt_calculated)(struct sctp_tcb *, struct sctp_nets *, struct timeval *); 786 }; 787 788 /* 789 * RS - Structure to hold function pointers to the functions responsible 790 * for stream scheduling. 791 */ 792 struct sctp_ss_functions { 793 void (*sctp_ss_init)(struct sctp_tcb *stcb, struct sctp_association *asoc, 794 int holds_lock); 795 void (*sctp_ss_clear)(struct sctp_tcb *stcb, struct sctp_association *asoc, 796 int clear_values, int holds_lock); 797 void (*sctp_ss_init_stream)(struct sctp_tcb *stcb, struct sctp_stream_out *strq, struct sctp_stream_out *with_strq); 798 void (*sctp_ss_add_to_stream)(struct sctp_tcb *stcb, struct sctp_association *asoc, 799 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 800 int (*sctp_ss_is_empty)(struct sctp_tcb *stcb, struct sctp_association *asoc); 801 void (*sctp_ss_remove_from_stream)(struct sctp_tcb *stcb, struct sctp_association *asoc, 802 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 803 struct sctp_stream_out* (*sctp_ss_select_stream)(struct sctp_tcb *stcb, 804 struct sctp_nets *net, struct sctp_association *asoc); 805 void (*sctp_ss_scheduled)(struct sctp_tcb *stcb, struct sctp_nets *net, 806 struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much); 807 void (*sctp_ss_packet_done)(struct sctp_tcb *stcb, struct sctp_nets *net, 808 struct sctp_association *asoc); 809 int (*sctp_ss_get_value)(struct sctp_tcb *stcb, struct sctp_association *asoc, 810 struct sctp_stream_out *strq, uint16_t *value); 811 int (*sctp_ss_set_value)(struct sctp_tcb *stcb, struct sctp_association *asoc, 812 struct sctp_stream_out *strq, uint16_t value); 813 int (*sctp_ss_is_user_msgs_incomplete)(struct sctp_tcb *stcb, struct sctp_association *asoc); 814 }; 815 816 /* used to save ASCONF chunks for retransmission */ 817 TAILQ_HEAD(sctp_asconf_head, sctp_asconf); 818 struct sctp_asconf { 819 TAILQ_ENTRY(sctp_asconf) next; 820 uint32_t serial_number; 821 uint16_t snd_count; 822 struct mbuf *data; 823 uint16_t len; 824 }; 825 826 /* used to save ASCONF-ACK chunks for retransmission */ 827 TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack); 828 struct sctp_asconf_ack { 829 TAILQ_ENTRY(sctp_asconf_ack) next; 830 uint32_t serial_number; 831 struct sctp_nets *last_sent_to; 832 struct mbuf *data; 833 uint16_t len; 834 }; 835 836 /* 837 * Here we have information about each individual association that we track. 838 * We probably in production would be more dynamic. But for ease of 839 * implementation we will have a fixed array that we hunt for in a linear 840 * fashion. 841 */ 842 struct sctp_association { 843 /* association state */ 844 int state; 845 846 /* queue of pending addrs to add/delete */ 847 struct sctp_asconf_addrhead asconf_queue; 848 849 struct timeval time_entered; /* time we entered state */ 850 struct timeval time_last_rcvd; 851 struct timeval time_last_sent; 852 struct timeval time_last_sat_advance; 853 struct sctp_nonpad_sndrcvinfo def_send; 854 855 /* timers and such */ 856 struct sctp_timer dack_timer; /* Delayed ack timer */ 857 struct sctp_timer asconf_timer; /* asconf */ 858 struct sctp_timer strreset_timer; /* stream reset */ 859 struct sctp_timer shut_guard_timer; /* shutdown guard */ 860 struct sctp_timer autoclose_timer; /* automatic close timer */ 861 struct sctp_timer delete_prim_timer; /* deleting primary dst */ 862 863 /* list of restricted local addresses */ 864 struct sctpladdr sctp_restricted_addrs; 865 866 /* last local address pending deletion (waiting for an address add) */ 867 struct sctp_ifa *asconf_addr_del_pending; 868 /* Deleted primary destination (used to stop timer) */ 869 struct sctp_nets *deleted_primary; 870 871 struct sctpnetlisthead nets; /* remote address list */ 872 873 /* Free chunk list */ 874 struct sctpchunk_listhead free_chunks; 875 876 /* Control chunk queue */ 877 struct sctpchunk_listhead control_send_queue; 878 879 /* ASCONF chunk queue */ 880 struct sctpchunk_listhead asconf_send_queue; 881 882 /* 883 * Once a TSN hits the wire it is moved to the sent_queue. We 884 * maintain two counts here (don't know if any but retran_cnt is 885 * needed). The idea is that the sent_queue_retran_cnt reflects how 886 * many chunks have been marked for retranmission by either T3-rxt 887 * or FR. 888 */ 889 struct sctpchunk_listhead sent_queue; 890 struct sctpchunk_listhead send_queue; 891 892 /* Scheduling queues */ 893 struct scheduling_data ss_data; 894 895 /* If an iterator is looking at me, this is it */ 896 struct sctp_iterator *stcb_starting_point_for_iterator; 897 898 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 899 struct sctp_asconf_ackhead asconf_ack_sent; 900 901 /* 902 * pointer to last stream reset queued to control queue by us with 903 * requests. 904 */ 905 struct sctp_tmit_chunk *str_reset; 906 /* 907 * if Source Address Selection happening, this will rotate through 908 * the link list. 909 */ 910 struct sctp_laddr *last_used_address; 911 912 /* stream arrays */ 913 struct sctp_stream_in *strmin; 914 struct sctp_stream_out *strmout; 915 uint8_t *mapping_array; 916 /* primary destination to use */ 917 struct sctp_nets *primary_destination; 918 struct sctp_nets *alternate; /* If primary is down or PF */ 919 /* For CMT */ 920 struct sctp_nets *last_net_cmt_send_started; 921 /* last place I got a data chunk from */ 922 struct sctp_nets *last_data_chunk_from; 923 /* last place I got a control from */ 924 struct sctp_nets *last_control_chunk_from; 925 926 927 /* 928 * wait to the point the cum-ack passes req->send_reset_at_tsn for 929 * any req on the list. 930 */ 931 struct sctp_resethead resetHead; 932 933 /* queue of chunks waiting to be sent into the local stack */ 934 struct sctp_readhead pending_reply_queue; 935 936 /* JRS - the congestion control functions are in this struct */ 937 struct sctp_cc_functions cc_functions; 938 /* JRS - value to store the currently loaded congestion control module */ 939 uint32_t congestion_control_module; 940 /* RS - the stream scheduling functions are in this struct */ 941 struct sctp_ss_functions ss_functions; 942 /* RS - value to store the currently loaded stream scheduling module */ 943 uint32_t stream_scheduling_module; 944 945 uint32_t vrf_id; 946 uint32_t cookie_preserve_req; 947 /* ASCONF next seq I am sending out, inits at init-tsn */ 948 uint32_t asconf_seq_out; 949 uint32_t asconf_seq_out_acked; 950 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 951 uint32_t asconf_seq_in; 952 953 /* next seq I am sending in str reset messages */ 954 uint32_t str_reset_seq_out; 955 /* next seq I am expecting in str reset messages */ 956 uint32_t str_reset_seq_in; 957 958 /* various verification tag information */ 959 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 960 * by remote end, and I have unlocked this 961 * will be regenerated to a new random value. */ 962 uint32_t peer_vtag; /* The peers last tag */ 963 964 uint32_t my_vtag_nonce; 965 uint32_t peer_vtag_nonce; 966 967 uint32_t assoc_id; 968 969 /* This is the SCTP fragmentation threshold */ 970 uint32_t smallest_mtu; 971 972 /* 973 * Special hook for Fast retransmit, allows us to track the highest 974 * TSN that is NEW in this SACK if gap ack blocks are present. 975 */ 976 uint32_t this_sack_highest_gap; 977 978 /* 979 * The highest consecutive TSN that has been acked by peer on my 980 * sends 981 */ 982 uint32_t last_acked_seq; 983 984 /* The next TSN that I will use in sending. */ 985 uint32_t sending_seq; 986 987 /* Original seq number I used ??questionable to keep?? */ 988 uint32_t init_seq_number; 989 990 991 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 992 /* (A1 in Section 4.2) */ 993 uint32_t advanced_peer_ack_point; 994 995 /* 996 * The highest consequetive TSN at the bottom of the mapping array 997 * (for his sends). 998 */ 999 uint32_t cumulative_tsn; 1000 /* 1001 * Used to track the mapping array and its offset bits. This MAY be 1002 * lower then cumulative_tsn. 1003 */ 1004 uint32_t mapping_array_base_tsn; 1005 /* 1006 * used to track highest TSN we have received and is listed in the 1007 * mapping array. 1008 */ 1009 uint32_t highest_tsn_inside_map; 1010 1011 /* EY - new NR variables used for nr_sack based on mapping_array*/ 1012 uint8_t *nr_mapping_array; 1013 uint32_t highest_tsn_inside_nr_map; 1014 1015 uint32_t fast_recovery_tsn; 1016 uint32_t sat_t3_recovery_tsn; 1017 uint32_t tsn_last_delivered; 1018 /* 1019 * For the pd-api we should re-write this a bit more efficient. We 1020 * could have multiple sctp_queued_to_read's that we are building at 1021 * once. Now we only do this when we get ready to deliver to the 1022 * socket buffer. Note that we depend on the fact that the struct is 1023 * "stuck" on the read queue until we finish all the pd-api. 1024 */ 1025 struct sctp_queued_to_read *control_pdapi; 1026 1027 uint32_t tsn_of_pdapi_last_delivered; 1028 uint32_t pdapi_ppid; 1029 uint32_t context; 1030 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 1031 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 1032 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 1033 #ifdef SCTP_ASOCLOG_OF_TSNS 1034 /* 1035 * special log - This adds considerable size 1036 * to the asoc, but provides a log that you 1037 * can use to detect problems via kgdb. 1038 */ 1039 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE]; 1040 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE]; 1041 uint32_t cumack_log[SCTP_TSN_LOG_SIZE]; 1042 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE]; 1043 uint16_t tsn_in_at; 1044 uint16_t tsn_out_at; 1045 uint16_t tsn_in_wrapped; 1046 uint16_t tsn_out_wrapped; 1047 uint16_t cumack_log_at; 1048 uint16_t cumack_log_atsnt; 1049 #endif /* SCTP_ASOCLOG_OF_TSNS */ 1050 #ifdef SCTP_FS_SPEC_LOG 1051 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE]; 1052 uint16_t fs_index; 1053 #endif 1054 1055 /* 1056 * window state information and smallest MTU that I use to bound 1057 * segmentation 1058 */ 1059 uint32_t peers_rwnd; 1060 uint32_t my_rwnd; 1061 uint32_t my_last_reported_rwnd; 1062 uint32_t sctp_frag_point; 1063 1064 uint32_t total_output_queue_size; 1065 1066 uint32_t sb_cc; /* shadow of sb_cc */ 1067 uint32_t sb_send_resv; /* amount reserved on a send */ 1068 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd control */ 1069 #ifdef INET6 1070 uint32_t default_flowlabel; 1071 #endif 1072 uint32_t pr_sctp_cnt; 1073 int ctrl_queue_cnt; /* could be removed REM - NO IT CAN'T!! RRS */ 1074 /* 1075 * All outbound datagrams queue into this list from the individual 1076 * stream queue. Here they get assigned a TSN and then await 1077 * sending. The stream seq comes when it is first put in the 1078 * individual str queue 1079 */ 1080 unsigned int stream_queue_cnt; 1081 unsigned int send_queue_cnt; 1082 unsigned int sent_queue_cnt; 1083 unsigned int sent_queue_cnt_removeable; 1084 /* 1085 * Number on sent queue that are marked for retran until this value 1086 * is 0 we only send one packet of retran'ed data. 1087 */ 1088 unsigned int sent_queue_retran_cnt; 1089 1090 unsigned int size_on_reasm_queue; 1091 unsigned int cnt_on_reasm_queue; 1092 unsigned int fwd_tsn_cnt; 1093 /* amount of data (bytes) currently in flight (on all destinations) */ 1094 unsigned int total_flight; 1095 /* Total book size in flight */ 1096 unsigned int total_flight_count; /* count of chunks used with 1097 * book total */ 1098 /* count of destinaton nets and list of destination nets */ 1099 unsigned int numnets; 1100 1101 /* Total error count on this association */ 1102 unsigned int overall_error_count; 1103 1104 unsigned int cnt_msg_on_sb; 1105 1106 /* All stream count of chunks for delivery */ 1107 unsigned int size_on_all_streams; 1108 unsigned int cnt_on_all_streams; 1109 1110 /* Heart Beat delay in ms */ 1111 uint32_t heart_beat_delay; 1112 1113 /* autoclose */ 1114 uint32_t sctp_autoclose_ticks; 1115 1116 /* how many preopen streams we have */ 1117 unsigned int pre_open_streams; 1118 1119 /* How many streams I support coming into me */ 1120 unsigned int max_inbound_streams; 1121 1122 /* the cookie life I award for any cookie, in seconds */ 1123 uint32_t cookie_life; 1124 /* time to delay acks for */ 1125 unsigned int delayed_ack; 1126 unsigned int old_delayed_ack; 1127 unsigned int sack_freq; 1128 unsigned int data_pkts_seen; 1129 1130 unsigned int numduptsns; 1131 int dup_tsns[SCTP_MAX_DUP_TSNS]; 1132 uint32_t initial_init_rto_max; /* initial RTO for INIT's */ 1133 uint32_t initial_rto; /* initial send RTO */ 1134 uint32_t minrto; /* per assoc RTO-MIN */ 1135 uint32_t maxrto; /* per assoc RTO-MAX */ 1136 1137 /* authentication fields */ 1138 sctp_auth_chklist_t *local_auth_chunks; 1139 sctp_auth_chklist_t *peer_auth_chunks; 1140 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 1141 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 1142 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 1143 sctp_authinfo_t authinfo; /* randoms, cached keys */ 1144 /* 1145 * refcnt to block freeing when a sender or receiver is off coping 1146 * user data in. 1147 */ 1148 uint32_t refcnt; 1149 uint32_t chunks_on_out_queue; /* total chunks floating around, 1150 * locked by send socket buffer */ 1151 uint32_t peers_adaptation; 1152 uint32_t default_mtu; 1153 uint16_t peer_hmac_id; /* peer HMAC id to send */ 1154 1155 /* 1156 * Being that we have no bag to collect stale cookies, and that we 1157 * really would not want to anyway.. we will count them in this 1158 * counter. We of course feed them to the pigeons right away (I have 1159 * always thought of pigeons as flying rats). 1160 */ 1161 uint16_t stale_cookie_count; 1162 1163 /* 1164 * For the partial delivery API, if up, invoked this is what last 1165 * TSN I delivered 1166 */ 1167 uint16_t str_of_pdapi; 1168 uint16_t ssn_of_pdapi; 1169 1170 /* counts of actual built streams. Allocation may be more however */ 1171 /* could re-arrange to optimize space here. */ 1172 uint16_t streamincnt; 1173 uint16_t streamoutcnt; 1174 uint16_t strm_realoutsize; 1175 uint16_t strm_pending_add_size; 1176 /* my maximum number of retrans of INIT and SEND */ 1177 /* copied from SCTP but should be individually setable */ 1178 uint16_t max_init_times; 1179 uint16_t max_send_times; 1180 1181 uint16_t def_net_failure; 1182 1183 uint16_t def_net_pf_threshold; 1184 1185 /* 1186 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 1187 * awaiting ACK 1188 */ 1189 uint16_t mapping_array_size; 1190 1191 uint16_t last_strm_seq_delivered; 1192 uint16_t last_strm_no_delivered; 1193 1194 uint16_t last_revoke_count; 1195 int16_t num_send_timers_up; 1196 1197 uint16_t stream_locked_on; 1198 uint16_t ecn_echo_cnt_onq; 1199 1200 uint16_t free_chunk_cnt; 1201 uint8_t stream_locked; 1202 uint8_t authenticated; /* packet authenticated ok */ 1203 /* 1204 * This flag indicates that a SACK need to be sent. 1205 * Initially this is 1 to send the first sACK immediately. 1206 */ 1207 uint8_t send_sack; 1208 1209 /* max burst of new packets into the network */ 1210 uint32_t max_burst; 1211 /* max burst of fast retransmit packets */ 1212 uint32_t fr_max_burst; 1213 1214 uint8_t sat_network; /* RTT is in range of sat net or greater */ 1215 uint8_t sat_network_lockout; /* lockout code */ 1216 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 1217 /* flag goes on when we are doing a partial delivery api */ 1218 uint8_t hb_random_values[4]; 1219 uint8_t fragmented_delivery_inprogress; 1220 uint8_t fragment_flags; 1221 uint8_t last_flags_delivered; 1222 uint8_t hb_ect_randombit; 1223 uint8_t hb_random_idx; 1224 uint8_t default_dscp; 1225 uint8_t asconf_del_pending; /* asconf delete last addr pending */ 1226 uint8_t trigger_reset; 1227 /* 1228 * This value, plus all other ack'd but above cum-ack is added 1229 * together to cross check against the bit that we have yet to 1230 * define (probably in the SACK). When the cum-ack is updated, this 1231 * sum is updated as well. 1232 */ 1233 1234 /* Flags whether an extension is supported or not */ 1235 uint8_t ecn_supported; 1236 uint8_t prsctp_supported; 1237 uint8_t auth_supported; 1238 uint8_t asconf_supported; 1239 uint8_t reconfig_supported; 1240 uint8_t nrsack_supported; 1241 uint8_t pktdrop_supported; 1242 uint8_t idata_supported; 1243 1244 /* Did the peer make the stream config (add out) request */ 1245 uint8_t peer_req_out; 1246 1247 uint8_t local_strreset_support; 1248 uint8_t peer_supports_nat; 1249 1250 struct sctp_scoping scope; 1251 /* flags to handle send alternate net tracking */ 1252 uint8_t used_alt_asconfack; 1253 uint8_t fast_retran_loss_recovery; 1254 uint8_t sat_t3_loss_recovery; 1255 uint8_t dropped_special_cnt; 1256 uint8_t seen_a_sack_this_pkt; 1257 uint8_t stream_reset_outstanding; 1258 uint8_t stream_reset_out_is_outstanding; 1259 uint8_t delayed_connection; 1260 uint8_t ifp_had_enobuf; 1261 uint8_t saw_sack_with_frags; 1262 uint8_t saw_sack_with_nr_frags; 1263 uint8_t in_asocid_hash; 1264 uint8_t assoc_up_sent; 1265 uint8_t adaptation_needed; 1266 uint8_t adaptation_sent; 1267 /* CMT variables */ 1268 uint8_t cmt_dac_pkts_rcvd; 1269 uint8_t sctp_cmt_on_off; 1270 uint8_t iam_blocking; 1271 uint8_t cookie_how[8]; 1272 /* JRS 5/21/07 - CMT PF variable */ 1273 uint8_t sctp_cmt_pf; 1274 uint8_t use_precise_time; 1275 uint64_t sctp_features; 1276 uint32_t max_cwnd; 1277 uint16_t port; /* remote UDP encapsulation port */ 1278 /* 1279 * The mapping array is used to track out of order sequences above 1280 * last_acked_seq. 0 indicates packet missing 1 indicates packet 1281 * rec'd. We slide it up every time we raise last_acked_seq and 0 1282 * trailing locactions out. If I get a TSN above the array 1283 * mappingArraySz, I discard the datagram and let retransmit happen. 1284 */ 1285 uint32_t marked_retrans; 1286 uint32_t timoinit; 1287 uint32_t timodata; 1288 uint32_t timosack; 1289 uint32_t timoshutdown; 1290 uint32_t timoheartbeat; 1291 uint32_t timocookie; 1292 uint32_t timoshutdownack; 1293 struct timeval start_time; 1294 struct timeval discontinuity_time; 1295 uint64_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 1296 uint64_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 1297 }; 1298 1299 #endif 1300