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 #if defined(__FreeBSD__) && !defined(__Userspace__) 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD: head/sys/netinet/sctp_structs.h 362106 2020-06-12 16:31:13Z tuexen $"); 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__) && !defined(__Userspace__) 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(__Userspace__) 117 #if defined(SCTP_MCORE_INPUT) && defined(SMP) 118 /* whats on the mcore control struct */ 119 struct sctp_mcore_queue { 120 TAILQ_ENTRY(sctp_mcore_queue) next; 121 struct vnet *vn; 122 struct mbuf *m; 123 int off; 124 int v6; 125 }; 126 127 TAILQ_HEAD(sctp_mcore_qhead, sctp_mcore_queue); 128 129 struct sctp_mcore_ctrl { 130 SCTP_PROCESS_STRUCT thread_proc; 131 struct sctp_mcore_qhead que; 132 struct mtx core_mtx; 133 struct mtx que_mtx; 134 int running; 135 int cpuid; 136 }; 137 #endif 138 #endif 139 140 struct sctp_iterator { 141 TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr; 142 #if defined(__FreeBSD__) && !defined(__Userspace__) 143 struct vnet *vn; 144 #endif 145 struct sctp_timer tmr; 146 struct sctp_inpcb *inp; /* current endpoint */ 147 struct sctp_tcb *stcb; /* current* assoc */ 148 struct sctp_inpcb *next_inp; /* special hook to skip to */ 149 asoc_func function_assoc; /* per assoc function */ 150 inp_func function_inp; /* per endpoint function */ 151 inp_func function_inp_end; /* end INP function */ 152 end_func function_atend; /* iterator completion function */ 153 void *pointer; /* pointer for apply func to use */ 154 uint32_t val; /* value for apply func to use */ 155 uint32_t pcb_flags; /* endpoint flags being checked */ 156 uint32_t pcb_features; /* endpoint features being checked */ 157 uint32_t asoc_state; /* assoc state being checked */ 158 uint32_t iterator_flags; 159 uint8_t no_chunk_output; 160 uint8_t done_current_ep; 161 }; 162 /* iterator_flags values */ 163 #define SCTP_ITERATOR_DO_ALL_INP 0x00000001 164 #define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002 165 166 167 TAILQ_HEAD(sctpiterators, sctp_iterator); 168 169 struct sctp_copy_all { 170 struct sctp_inpcb *inp; /* ep */ 171 struct mbuf *m; 172 struct sctp_sndrcvinfo sndrcv; 173 ssize_t sndlen; 174 int cnt_sent; 175 int cnt_failed; 176 }; 177 178 struct sctp_asconf_iterator { 179 struct sctpladdr list_of_work; 180 int cnt; 181 }; 182 183 struct iterator_control { 184 #if defined(__FreeBSD__) && !defined(__Userspace__) 185 struct mtx ipi_iterator_wq_mtx; 186 struct mtx it_mtx; 187 #elif defined(__APPLE__) && !defined(__Userspace__) 188 lck_mtx_t *ipi_iterator_wq_mtx; 189 lck_mtx_t *it_mtx; 190 #elif defined(SCTP_PROCESS_LEVEL_LOCKS) 191 #if defined(__Userspace__) 192 userland_mutex_t ipi_iterator_wq_mtx; 193 userland_mutex_t it_mtx; 194 userland_cond_t iterator_wakeup; 195 #else 196 pthread_mutex_t ipi_iterator_wq_mtx; 197 pthread_mutex_t it_mtx; 198 pthread_cond_t iterator_wakeup; 199 #endif 200 #elif defined(_WIN32) && !defined(__Userspace__) 201 struct spinlock it_lock; 202 struct spinlock ipi_iterator_wq_lock; 203 KEVENT iterator_wakeup[2]; 204 PFILE_OBJECT iterator_thread_obj; 205 #else 206 void *it_mtx; 207 #endif 208 #if !(defined(_WIN32) && !defined(__Userspace__)) 209 #if !defined(__Userspace__) 210 SCTP_PROCESS_STRUCT thread_proc; 211 #else 212 userland_thread_t thread_proc; 213 #endif 214 #endif 215 struct sctpiterators iteratorhead; 216 struct sctp_iterator *cur_it; 217 uint32_t iterator_running; 218 uint32_t iterator_flags; 219 }; 220 #if !(defined(__FreeBSD__) && !defined(__Userspace__)) 221 #define SCTP_ITERATOR_MUST_EXIT 0x00000001 222 #define SCTP_ITERATOR_EXITED 0x00000002 223 #endif 224 #define SCTP_ITERATOR_STOP_CUR_IT 0x00000004 225 #define SCTP_ITERATOR_STOP_CUR_INP 0x00000008 226 227 struct sctp_net_route { 228 #if defined(__FreeBSD__) && !defined(__Userspace__) 229 struct nhop_object *ro_nh; 230 struct llentry *ro_lle; 231 char *ro_prepend; 232 uint16_t ro_plen; 233 uint16_t ro_flags; 234 uint16_t ro_mtu; 235 uint16_t spare; 236 #else 237 sctp_rtentry_t *ro_rt; 238 #endif 239 #if defined(__APPLE__) && !defined(__Userspace__) 240 #if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION) && !defined(APPLE_ELCAPITAN) 241 struct llentry *ro_lle; 242 #endif 243 #if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION) 244 struct ifaddr *ro_srcia; 245 #endif 246 #if !defined(APPLE_LEOPARD) 247 uint32_t ro_flags; 248 #endif 249 #endif 250 union sctp_sockstore _l_addr; /* remote peer addr */ 251 struct sctp_ifa *_s_addr; /* our selected src addr */ 252 }; 253 254 struct htcp { 255 uint16_t alpha; /* Fixed point arith, << 7 */ 256 uint8_t beta; /* Fixed point arith, << 7 */ 257 uint8_t modeswitch; /* Delay modeswitch until we had at least one congestion event */ 258 uint32_t last_cong; /* Time since last congestion event end */ 259 uint32_t undo_last_cong; 260 uint16_t bytes_acked; 261 uint32_t bytecount; 262 uint32_t minRTT; 263 uint32_t maxRTT; 264 265 uint32_t undo_maxRTT; 266 uint32_t undo_old_maxB; 267 268 /* Bandwidth estimation */ 269 uint32_t minB; 270 uint32_t maxB; 271 uint32_t old_maxB; 272 uint32_t Bi; 273 uint32_t lasttime; 274 }; 275 276 struct rtcc_cc { 277 struct timeval tls; /* The time we started the sending */ 278 uint64_t lbw; /* Our last estimated bw */ 279 uint64_t lbw_rtt; /* RTT at bw estimate */ 280 uint64_t bw_bytes; /* The total bytes since this sending began */ 281 uint64_t bw_tot_time; /* The total time since sending began */ 282 uint64_t new_tot_time; /* temp holding the new value */ 283 uint64_t bw_bytes_at_last_rttc; /* What bw_bytes was at last rtt calc */ 284 uint32_t cwnd_at_bw_set; /* Cwnd at last bw saved - lbw */ 285 uint32_t vol_reduce; /* cnt of voluntary reductions */ 286 uint16_t steady_step; /* The number required to be in steady state*/ 287 uint16_t step_cnt; /* The current number */ 288 uint8_t ret_from_eq; /* When all things are equal what do I return 0/1 - 1 no cc advance */ 289 uint8_t use_dccc_ecn; /* Flag to enable DCCC ECN */ 290 uint8_t tls_needs_set; /* Flag to indicate we need to set tls 0 or 1 means set at send 2 not */ 291 uint8_t last_step_state; /* Last state if steady state stepdown is on */ 292 uint8_t rtt_set_this_sack; /* Flag saying this sack had RTT calc on it */ 293 uint8_t last_inst_ind; /* Last saved inst indication */ 294 }; 295 296 297 struct sctp_nets { 298 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */ 299 300 /* 301 * Things on the top half may be able to be split into a common 302 * structure shared by all. 303 */ 304 struct sctp_timer pmtu_timer; 305 struct sctp_timer hb_timer; 306 307 /* 308 * The following two in combination equate to a route entry for v6 309 * or v4. 310 */ 311 struct sctp_net_route ro; 312 313 /* mtu discovered so far */ 314 uint32_t mtu; 315 uint32_t ssthresh; /* not sure about this one for split */ 316 uint32_t last_cwr_tsn; 317 uint32_t cwr_window_tsn; 318 uint32_t ecn_ce_pkt_cnt; 319 uint32_t lost_cnt; 320 /* smoothed average things for RTT and RTO itself */ 321 int lastsa; 322 int lastsv; 323 uint64_t rtt; /* last measured rtt value in us */ 324 uint32_t RTO; 325 326 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */ 327 struct sctp_timer rxt_timer; 328 329 /* last time in seconds I sent to it */ 330 struct timeval last_sent_time; 331 union cc_control_data { 332 struct htcp htcp_ca; /* JRS - struct used in HTCP algorithm */ 333 struct rtcc_cc rtcc; /* rtcc module cc stuff */ 334 } cc_mod; 335 int ref_count; 336 337 /* Congestion stats per destination */ 338 /* 339 * flight size variables and such, sorry Vern, I could not avoid 340 * this if I wanted performance :> 341 */ 342 uint32_t flight_size; 343 uint32_t cwnd; /* actual cwnd */ 344 uint32_t prev_cwnd; /* cwnd before any processing */ 345 uint32_t ecn_prev_cwnd; /* ECN prev cwnd at first ecn_echo seen in new window */ 346 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */ 347 /* tracking variables to avoid the aloc/free in sack processing */ 348 unsigned int net_ack; 349 unsigned int net_ack2; 350 351 /* 352 * JRS - 5/8/07 - Variable to track last time 353 * a destination was active for CMT PF 354 */ 355 uint32_t last_active; 356 357 /* 358 * CMT variables (iyengar@cis.udel.edu) 359 */ 360 uint32_t this_sack_highest_newack; /* tracks highest TSN newly 361 * acked for a given dest in 362 * the current SACK. Used in 363 * SFR and HTNA algos */ 364 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected 365 * pseudo-cumack for this destination */ 366 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next 367 * expected pseudo-cumack for this 368 * destination */ 369 370 /* CMT fast recovery variables */ 371 uint32_t fast_recovery_tsn; 372 uint32_t heartbeat_random1; 373 uint32_t heartbeat_random2; 374 #ifdef INET6 375 uint32_t flowlabel; 376 #endif 377 uint8_t dscp; 378 379 struct timeval start_time; /* time when this net was created */ 380 uint32_t marked_retrans; /* number or DATA chunks marked for 381 timer based retransmissions */ 382 uint32_t marked_fastretrans; 383 uint32_t heart_beat_delay; /* Heart Beat delay in ms */ 384 385 /* if this guy is ok or not ... status */ 386 uint16_t dest_state; 387 /* number of timeouts to consider the destination unreachable */ 388 uint16_t failure_threshold; 389 /* number of timeouts to consider the destination potentially failed */ 390 uint16_t pf_threshold; 391 /* error stats on the destination */ 392 uint16_t error_count; 393 /* UDP port number in case of UDP tunneling */ 394 uint16_t port; 395 396 uint8_t fast_retran_loss_recovery; 397 uint8_t will_exit_fast_recovery; 398 /* Flags that probably can be combined into dest_state */ 399 uint8_t fast_retran_ip; /* fast retransmit in progress */ 400 uint8_t hb_responded; 401 uint8_t saw_newack; /* CMT's SFR algorithm flag */ 402 uint8_t src_addr_selected; /* if we split we move */ 403 uint8_t indx_of_eligible_next_to_use; 404 uint8_t addr_is_local; /* its a local address (if known) could move 405 * in split */ 406 407 /* 408 * CMT variables (iyengar@cis.udel.edu) 409 */ 410 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to 411 * find a new pseudocumack. This flag 412 * is set after a new pseudo-cumack 413 * has been received and indicates 414 * that the sender should find the 415 * next pseudo-cumack expected for 416 * this destination */ 417 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to 418 * find a new rtx-pseudocumack. This 419 * flag is set after a new 420 * rtx-pseudo-cumack has been received 421 * and indicates that the sender 422 * should find the next 423 * rtx-pseudo-cumack expected for this 424 * destination */ 425 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to 426 * indicate if a new pseudo-cumack or 427 * rtx-pseudo-cumack has been received */ 428 uint8_t window_probe; /* Doing a window probe? */ 429 uint8_t RTO_measured; /* Have we done the first measure */ 430 uint8_t last_hs_used; /* index into the last HS table entry we used */ 431 uint8_t lan_type; 432 uint8_t rto_needed; 433 #if defined(__FreeBSD__) && !defined(__Userspace__) 434 uint32_t flowid; 435 uint8_t flowtype; 436 #endif 437 }; 438 439 440 struct sctp_data_chunkrec { 441 uint32_t tsn; /* the TSN of this transmit */ 442 uint32_t mid; /* the message identifier of this transmit */ 443 uint16_t sid; /* the stream number of this guy */ 444 uint32_t ppid; 445 uint32_t context; /* from send */ 446 uint32_t cwnd_at_send; 447 /* 448 * part of the Highest sacked algorithm to be able to stroke counts 449 * on ones that are FR'd. 450 */ 451 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 452 struct timeval timetodrop; /* time we drop it from queue */ 453 uint32_t fsn; /* Fragment Sequence Number */ 454 uint8_t doing_fast_retransmit; 455 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 456 * outbound holds sending flags for PR-SCTP. 457 */ 458 uint8_t state_flags; 459 uint8_t chunk_was_revoked; 460 uint8_t fwd_tsn_cnt; 461 }; 462 463 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 464 465 /* The lower byte is used to enumerate PR_SCTP policies */ 466 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 467 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 468 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 469 470 /* The upper byte is used as a bit mask */ 471 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100 472 473 struct chk_id { 474 uint8_t id; 475 uint8_t can_take_data; 476 }; 477 478 479 struct sctp_tmit_chunk { 480 union { 481 struct sctp_data_chunkrec data; 482 struct chk_id chunk_id; 483 } rec; 484 struct sctp_association *asoc; /* bp to asoc this belongs to */ 485 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 486 struct mbuf *data; /* pointer to mbuf chain of data */ 487 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 488 struct sctp_nets *whoTo; 489 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 490 int32_t sent; /* the send status */ 491 uint16_t snd_count; /* number of times I sent */ 492 uint16_t flags; /* flags, such as FRAGMENT_OK */ 493 uint16_t send_size; 494 uint16_t book_size; 495 uint16_t mbcnt; 496 uint16_t auth_keyid; 497 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */ 498 uint8_t pad_inplace; 499 uint8_t do_rtt; 500 uint8_t book_size_scale; 501 uint8_t no_fr_allowed; 502 uint8_t copy_by_ref; 503 uint8_t window_probe; 504 }; 505 506 struct sctp_queued_to_read { /* sinfo structure Pluse more */ 507 uint16_t sinfo_stream; /* off the wire */ 508 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for 509 * EOR */ 510 uint32_t sinfo_ppid; /* off the wire */ 511 uint32_t sinfo_context; /* pick this up from assoc def context? */ 512 uint32_t sinfo_timetolive; /* not used by kernel */ 513 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */ 514 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */ 515 sctp_assoc_t sinfo_assoc_id; /* our assoc id */ 516 /* Non sinfo stuff */ 517 uint32_t mid; /* Fragment Index */ 518 uint32_t length; /* length of data */ 519 uint32_t held_length; /* length held in sb */ 520 uint32_t top_fsn; /* Highest FSN in queue */ 521 uint32_t fsn_included; /* Highest FSN in *data portion */ 522 struct sctp_nets *whoFrom; /* where it came from */ 523 struct mbuf *data; /* front of the mbuf chain of data with 524 * PKT_HDR */ 525 struct mbuf *tail_mbuf; /* used for multi-part data */ 526 struct mbuf *aux_data; /* used to hold/cache control if o/s does not take it from us */ 527 struct sctp_tcb *stcb; /* assoc, used for window update */ 528 TAILQ_ENTRY(sctp_queued_to_read) next; 529 TAILQ_ENTRY(sctp_queued_to_read) next_instrm; 530 struct sctpchunk_listhead reasm; 531 uint16_t port_from; 532 uint16_t spec_flags; /* Flags to hold the notification field */ 533 uint8_t do_not_ref_stcb; 534 uint8_t end_added; 535 uint8_t pdapi_aborted; 536 uint8_t pdapi_started; 537 uint8_t some_taken; 538 uint8_t last_frag_seen; 539 uint8_t first_frag_seen; 540 uint8_t on_read_q; 541 uint8_t on_strm_q; 542 }; 543 544 #define SCTP_ON_ORDERED 1 545 #define SCTP_ON_UNORDERED 2 546 547 /* This data structure will be on the outbound 548 * stream queues. Data will be pulled off from 549 * the front of the mbuf data and chunk-ified 550 * by the output routines. We will custom 551 * fit every chunk we pull to the send/sent 552 * queue to make up the next full packet 553 * if we can. An entry cannot be removed 554 * from the stream_out queue until 555 * the msg_is_complete flag is set. This 556 * means at times data/tail_mbuf MIGHT 557 * be NULL.. If that occurs it happens 558 * for one of two reasons. Either the user 559 * is blocked on a send() call and has not 560 * awoken to copy more data down... OR 561 * the user is in the explict MSG_EOR mode 562 * and wrote some data, but has not completed 563 * sending. 564 */ 565 struct sctp_stream_queue_pending { 566 struct mbuf *data; 567 struct mbuf *tail_mbuf; 568 struct timeval ts; 569 struct sctp_nets *net; 570 TAILQ_ENTRY (sctp_stream_queue_pending) next; 571 TAILQ_ENTRY (sctp_stream_queue_pending) ss_next; 572 uint32_t fsn; 573 uint32_t length; 574 uint32_t timetolive; 575 uint32_t ppid; 576 uint32_t context; 577 uint16_t sinfo_flags; 578 uint16_t sid; 579 uint16_t act_flags; 580 uint16_t auth_keyid; 581 uint8_t holds_key_ref; 582 uint8_t msg_is_complete; 583 uint8_t some_taken; 584 uint8_t sender_all_done; 585 uint8_t put_last_out; 586 uint8_t discard_rest; 587 }; 588 589 /* 590 * this struct contains info that is used to track inbound stream data and 591 * help with ordering. 592 */ 593 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 594 struct sctp_stream_in { 595 struct sctp_readhead inqueue; 596 struct sctp_readhead uno_inqueue; 597 uint32_t last_mid_delivered; /* used for re-order */ 598 uint16_t sid; 599 uint8_t delivery_started; 600 uint8_t pd_api_started; 601 }; 602 603 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 604 TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending); 605 606 607 /* Round-robin schedulers */ 608 struct ss_rr { 609 /* next link in wheel */ 610 TAILQ_ENTRY(sctp_stream_out) next_spoke; 611 }; 612 613 /* Priority scheduler */ 614 struct ss_prio { 615 /* next link in wheel */ 616 TAILQ_ENTRY(sctp_stream_out) next_spoke; 617 /* priority id */ 618 uint16_t priority; 619 }; 620 621 /* Fair Bandwidth scheduler */ 622 struct ss_fb { 623 /* next link in wheel */ 624 TAILQ_ENTRY(sctp_stream_out) next_spoke; 625 /* stores message size */ 626 int32_t rounds; 627 }; 628 629 /* 630 * This union holds all data necessary for 631 * different stream schedulers. 632 */ 633 struct scheduling_data { 634 struct sctp_stream_out *locked_on_sending; 635 /* circular looking for output selection */ 636 struct sctp_stream_out *last_out_stream; 637 union { 638 struct sctpwheel_listhead wheel; 639 struct sctplist_listhead list; 640 } out; 641 }; 642 643 /* 644 * This union holds all parameters per stream 645 * necessary for different stream schedulers. 646 */ 647 union scheduling_parameters { 648 struct ss_rr rr; 649 struct ss_prio prio; 650 struct ss_fb fb; 651 }; 652 653 /* States for outgoing streams */ 654 #define SCTP_STREAM_CLOSED 0x00 655 #define SCTP_STREAM_OPENING 0x01 656 #define SCTP_STREAM_OPEN 0x02 657 #define SCTP_STREAM_RESET_PENDING 0x03 658 #define SCTP_STREAM_RESET_IN_FLIGHT 0x04 659 660 #define SCTP_MAX_STREAMS_AT_ONCE_RESET 200 661 662 /* This struct is used to track the traffic on outbound streams */ 663 struct sctp_stream_out { 664 struct sctp_streamhead outqueue; 665 union scheduling_parameters ss_params; 666 uint32_t chunks_on_queues; /* send queue and sent queue */ 667 #if defined(SCTP_DETAILED_STR_STATS) 668 uint32_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 669 uint32_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 670 #else 671 /* Only the aggregation */ 672 uint32_t abandoned_unsent[1]; 673 uint32_t abandoned_sent[1]; 674 #endif 675 /* For associations using DATA chunks, the lower 16-bit of 676 * next_mid_ordered are used as the next SSN. 677 */ 678 uint32_t next_mid_ordered; 679 uint32_t next_mid_unordered; 680 uint16_t sid; 681 uint8_t last_msg_incomplete; 682 uint8_t state; 683 }; 684 685 /* used to keep track of the addresses yet to try to add/delete */ 686 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 687 struct sctp_asconf_addr { 688 TAILQ_ENTRY(sctp_asconf_addr) next; 689 struct sctp_asconf_addr_param ap; 690 struct sctp_ifa *ifa; /* save the ifa for add/del ip */ 691 uint8_t sent; /* has this been sent yet? */ 692 uint8_t special_del; /* not to be used in lookup */ 693 }; 694 695 struct sctp_scoping { 696 uint8_t ipv4_addr_legal; 697 uint8_t ipv6_addr_legal; 698 #if defined(__Userspace__) 699 uint8_t conn_addr_legal; 700 #endif 701 uint8_t loopback_scope; 702 uint8_t ipv4_local_scope; 703 uint8_t local_scope; 704 uint8_t site_scope; 705 }; 706 707 #define SCTP_TSN_LOG_SIZE 40 708 709 struct sctp_tsn_log { 710 void *stcb; 711 uint32_t tsn; 712 uint32_t seq; 713 uint16_t strm; 714 uint16_t sz; 715 uint16_t flgs; 716 uint16_t in_pos; 717 uint16_t in_out; 718 uint16_t resv; 719 }; 720 721 #define SCTP_FS_SPEC_LOG_SIZE 200 722 struct sctp_fs_spec_log { 723 uint32_t sent; 724 uint32_t total_flight; 725 uint32_t tsn; 726 uint16_t book; 727 uint8_t incr; 728 uint8_t decr; 729 }; 730 731 /* This struct is here to cut out the compatiabilty 732 * pad that bulks up both the inp and stcb. The non 733 * pad portion MUST stay in complete sync with 734 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added 735 * this must be done here too. 736 */ 737 struct sctp_nonpad_sndrcvinfo { 738 uint16_t sinfo_stream; 739 uint16_t sinfo_ssn; 740 uint16_t sinfo_flags; 741 uint32_t sinfo_ppid; 742 uint32_t sinfo_context; 743 uint32_t sinfo_timetolive; 744 uint32_t sinfo_tsn; 745 uint32_t sinfo_cumtsn; 746 sctp_assoc_t sinfo_assoc_id; 747 uint16_t sinfo_keynumber; 748 uint16_t sinfo_keynumber_valid; 749 }; 750 751 /* 752 * JRS - Structure to hold function pointers to the functions responsible 753 * for congestion control. 754 */ 755 756 struct sctp_cc_functions { 757 void (*sctp_set_initial_cc_param)(struct sctp_tcb *stcb, struct sctp_nets *net); 758 void (*sctp_cwnd_update_after_sack)(struct sctp_tcb *stcb, 759 struct sctp_association *asoc, 760 int accum_moved ,int reneged_all, int will_exit); 761 void (*sctp_cwnd_update_exit_pf)(struct sctp_tcb *stcb, struct sctp_nets *net); 762 void (*sctp_cwnd_update_after_fr)(struct sctp_tcb *stcb, 763 struct sctp_association *asoc); 764 void (*sctp_cwnd_update_after_timeout)(struct sctp_tcb *stcb, 765 struct sctp_nets *net); 766 void (*sctp_cwnd_update_after_ecn_echo)(struct sctp_tcb *stcb, 767 struct sctp_nets *net, int in_window, int num_pkt_lost); 768 void (*sctp_cwnd_update_after_packet_dropped)(struct sctp_tcb *stcb, 769 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp, 770 uint32_t *bottle_bw, uint32_t *on_queue); 771 void (*sctp_cwnd_update_after_output)(struct sctp_tcb *stcb, 772 struct sctp_nets *net, int burst_limit); 773 void (*sctp_cwnd_update_packet_transmitted)(struct sctp_tcb *stcb, 774 struct sctp_nets *net); 775 void (*sctp_cwnd_update_tsn_acknowledged)(struct sctp_nets *net, 776 struct sctp_tmit_chunk *); 777 void (*sctp_cwnd_new_transmission_begins)(struct sctp_tcb *stcb, 778 struct sctp_nets *net); 779 void (*sctp_cwnd_prepare_net_for_sack)(struct sctp_tcb *stcb, 780 struct sctp_nets *net); 781 int (*sctp_cwnd_socket_option)(struct sctp_tcb *stcb, int set, struct sctp_cc_option *); 782 void (*sctp_rtt_calculated)(struct sctp_tcb *, struct sctp_nets *, struct timeval *); 783 }; 784 785 /* 786 * RS - Structure to hold function pointers to the functions responsible 787 * for stream scheduling. 788 */ 789 struct sctp_ss_functions { 790 void (*sctp_ss_init)(struct sctp_tcb *stcb, struct sctp_association *asoc, 791 int holds_lock); 792 void (*sctp_ss_clear)(struct sctp_tcb *stcb, struct sctp_association *asoc, 793 int clear_values, int holds_lock); 794 void (*sctp_ss_init_stream)(struct sctp_tcb *stcb, struct sctp_stream_out *strq, struct sctp_stream_out *with_strq); 795 void (*sctp_ss_add_to_stream)(struct sctp_tcb *stcb, struct sctp_association *asoc, 796 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 797 int (*sctp_ss_is_empty)(struct sctp_tcb *stcb, struct sctp_association *asoc); 798 void (*sctp_ss_remove_from_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 struct sctp_stream_out* (*sctp_ss_select_stream)(struct sctp_tcb *stcb, 801 struct sctp_nets *net, struct sctp_association *asoc); 802 void (*sctp_ss_scheduled)(struct sctp_tcb *stcb, struct sctp_nets *net, 803 struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much); 804 void (*sctp_ss_packet_done)(struct sctp_tcb *stcb, struct sctp_nets *net, 805 struct sctp_association *asoc); 806 int (*sctp_ss_get_value)(struct sctp_tcb *stcb, struct sctp_association *asoc, 807 struct sctp_stream_out *strq, uint16_t *value); 808 int (*sctp_ss_set_value)(struct sctp_tcb *stcb, struct sctp_association *asoc, 809 struct sctp_stream_out *strq, uint16_t value); 810 int (*sctp_ss_is_user_msgs_incomplete)(struct sctp_tcb *stcb, struct sctp_association *asoc); 811 }; 812 813 /* used to save ASCONF chunks for retransmission */ 814 TAILQ_HEAD(sctp_asconf_head, sctp_asconf); 815 struct sctp_asconf { 816 TAILQ_ENTRY(sctp_asconf) next; 817 uint32_t serial_number; 818 uint16_t snd_count; 819 struct mbuf *data; 820 uint16_t len; 821 }; 822 823 /* used to save ASCONF-ACK chunks for retransmission */ 824 TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack); 825 struct sctp_asconf_ack { 826 TAILQ_ENTRY(sctp_asconf_ack) next; 827 uint32_t serial_number; 828 struct sctp_nets *last_sent_to; 829 struct mbuf *data; 830 uint16_t len; 831 }; 832 833 /* 834 * Here we have information about each individual association that we track. 835 * We probably in production would be more dynamic. But for ease of 836 * implementation we will have a fixed array that we hunt for in a linear 837 * fashion. 838 */ 839 struct sctp_association { 840 /* association state */ 841 int state; 842 843 /* queue of pending addrs to add/delete */ 844 struct sctp_asconf_addrhead asconf_queue; 845 846 struct timeval time_entered; /* time we entered state */ 847 struct timeval time_last_rcvd; 848 struct timeval time_last_sent; 849 struct timeval time_last_sat_advance; 850 struct sctp_nonpad_sndrcvinfo def_send; 851 852 /* timers and such */ 853 struct sctp_timer dack_timer; /* Delayed ack timer */ 854 struct sctp_timer asconf_timer; /* asconf */ 855 struct sctp_timer strreset_timer; /* stream reset */ 856 struct sctp_timer shut_guard_timer; /* shutdown guard */ 857 struct sctp_timer autoclose_timer; /* automatic close timer */ 858 struct sctp_timer delete_prim_timer; /* deleting primary dst */ 859 860 /* list of restricted local addresses */ 861 struct sctpladdr sctp_restricted_addrs; 862 863 /* last local address pending deletion (waiting for an address add) */ 864 struct sctp_ifa *asconf_addr_del_pending; 865 /* Deleted primary destination (used to stop timer) */ 866 struct sctp_nets *deleted_primary; 867 868 struct sctpnetlisthead nets; /* remote address list */ 869 870 /* Free chunk list */ 871 struct sctpchunk_listhead free_chunks; 872 873 /* Control chunk queue */ 874 struct sctpchunk_listhead control_send_queue; 875 876 /* ASCONF chunk queue */ 877 struct sctpchunk_listhead asconf_send_queue; 878 879 /* 880 * Once a TSN hits the wire it is moved to the sent_queue. We 881 * maintain two counts here (don't know if any but retran_cnt is 882 * needed). The idea is that the sent_queue_retran_cnt reflects how 883 * many chunks have been marked for retranmission by either T3-rxt 884 * or FR. 885 */ 886 struct sctpchunk_listhead sent_queue; 887 struct sctpchunk_listhead send_queue; 888 889 /* Scheduling queues */ 890 struct scheduling_data ss_data; 891 892 /* If an iterator is looking at me, this is it */ 893 struct sctp_iterator *stcb_starting_point_for_iterator; 894 895 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 896 struct sctp_asconf_ackhead asconf_ack_sent; 897 898 /* 899 * pointer to last stream reset queued to control queue by us with 900 * requests. 901 */ 902 struct sctp_tmit_chunk *str_reset; 903 /* 904 * if Source Address Selection happening, this will rotate through 905 * the link list. 906 */ 907 struct sctp_laddr *last_used_address; 908 909 /* stream arrays */ 910 struct sctp_stream_in *strmin; 911 struct sctp_stream_out *strmout; 912 uint8_t *mapping_array; 913 /* primary destination to use */ 914 struct sctp_nets *primary_destination; 915 struct sctp_nets *alternate; /* If primary is down or PF */ 916 /* For CMT */ 917 struct sctp_nets *last_net_cmt_send_started; 918 /* last place I got a data chunk from */ 919 struct sctp_nets *last_data_chunk_from; 920 /* last place I got a control from */ 921 struct sctp_nets *last_control_chunk_from; 922 923 924 /* 925 * wait to the point the cum-ack passes req->send_reset_at_tsn for 926 * any req on the list. 927 */ 928 struct sctp_resethead resetHead; 929 930 /* queue of chunks waiting to be sent into the local stack */ 931 struct sctp_readhead pending_reply_queue; 932 933 /* JRS - the congestion control functions are in this struct */ 934 struct sctp_cc_functions cc_functions; 935 /* JRS - value to store the currently loaded congestion control module */ 936 uint32_t congestion_control_module; 937 /* RS - the stream scheduling functions are in this struct */ 938 struct sctp_ss_functions ss_functions; 939 /* RS - value to store the currently loaded stream scheduling module */ 940 uint32_t stream_scheduling_module; 941 942 uint32_t vrf_id; 943 uint32_t cookie_preserve_req; 944 /* ASCONF next seq I am sending out, inits at init-tsn */ 945 uint32_t asconf_seq_out; 946 uint32_t asconf_seq_out_acked; 947 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 948 uint32_t asconf_seq_in; 949 950 /* next seq I am sending in str reset messages */ 951 uint32_t str_reset_seq_out; 952 /* next seq I am expecting in str reset messages */ 953 uint32_t str_reset_seq_in; 954 955 /* various verification tag information */ 956 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 957 * by remote end, and I have unlocked this 958 * will be regenerated to a new random value. */ 959 uint32_t peer_vtag; /* The peers last tag */ 960 961 uint32_t my_vtag_nonce; 962 uint32_t peer_vtag_nonce; 963 964 uint32_t assoc_id; 965 966 /* This is the SCTP fragmentation threshold */ 967 uint32_t smallest_mtu; 968 969 /* 970 * Special hook for Fast retransmit, allows us to track the highest 971 * TSN that is NEW in this SACK if gap ack blocks are present. 972 */ 973 uint32_t this_sack_highest_gap; 974 975 /* 976 * The highest consecutive TSN that has been acked by peer on my 977 * sends 978 */ 979 uint32_t last_acked_seq; 980 981 /* The next TSN that I will use in sending. */ 982 uint32_t sending_seq; 983 984 /* Original seq number I used ??questionable to keep?? */ 985 uint32_t init_seq_number; 986 987 988 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 989 /* (A1 in Section 4.2) */ 990 uint32_t advanced_peer_ack_point; 991 992 /* 993 * The highest consequetive TSN at the bottom of the mapping array 994 * (for his sends). 995 */ 996 uint32_t cumulative_tsn; 997 /* 998 * Used to track the mapping array and its offset bits. This MAY be 999 * lower then cumulative_tsn. 1000 */ 1001 uint32_t mapping_array_base_tsn; 1002 /* 1003 * used to track highest TSN we have received and is listed in the 1004 * mapping array. 1005 */ 1006 uint32_t highest_tsn_inside_map; 1007 1008 /* EY - new NR variables used for nr_sack based on mapping_array*/ 1009 uint8_t *nr_mapping_array; 1010 uint32_t highest_tsn_inside_nr_map; 1011 1012 uint32_t fast_recovery_tsn; 1013 uint32_t sat_t3_recovery_tsn; 1014 uint32_t tsn_last_delivered; 1015 /* 1016 * For the pd-api we should re-write this a bit more efficient. We 1017 * could have multiple sctp_queued_to_read's that we are building at 1018 * once. Now we only do this when we get ready to deliver to the 1019 * socket buffer. Note that we depend on the fact that the struct is 1020 * "stuck" on the read queue until we finish all the pd-api. 1021 */ 1022 struct sctp_queued_to_read *control_pdapi; 1023 1024 uint32_t tsn_of_pdapi_last_delivered; 1025 uint32_t pdapi_ppid; 1026 uint32_t context; 1027 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 1028 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 1029 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 1030 #ifdef SCTP_ASOCLOG_OF_TSNS 1031 /* 1032 * special log - This adds considerable size 1033 * to the asoc, but provides a log that you 1034 * can use to detect problems via kgdb. 1035 */ 1036 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE]; 1037 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE]; 1038 uint32_t cumack_log[SCTP_TSN_LOG_SIZE]; 1039 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE]; 1040 uint16_t tsn_in_at; 1041 uint16_t tsn_out_at; 1042 uint16_t tsn_in_wrapped; 1043 uint16_t tsn_out_wrapped; 1044 uint16_t cumack_log_at; 1045 uint16_t cumack_log_atsnt; 1046 #endif /* SCTP_ASOCLOG_OF_TSNS */ 1047 #ifdef SCTP_FS_SPEC_LOG 1048 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE]; 1049 uint16_t fs_index; 1050 #endif 1051 1052 /* 1053 * window state information and smallest MTU that I use to bound 1054 * segmentation 1055 */ 1056 uint32_t peers_rwnd; 1057 uint32_t my_rwnd; 1058 uint32_t my_last_reported_rwnd; 1059 uint32_t sctp_frag_point; 1060 1061 uint32_t total_output_queue_size; 1062 1063 uint32_t sb_cc; /* shadow of sb_cc */ 1064 uint32_t sb_send_resv; /* amount reserved on a send */ 1065 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd control */ 1066 #ifdef INET6 1067 uint32_t default_flowlabel; 1068 #endif 1069 uint32_t pr_sctp_cnt; 1070 int ctrl_queue_cnt; /* could be removed REM - NO IT CAN'T!! RRS */ 1071 /* 1072 * All outbound datagrams queue into this list from the individual 1073 * stream queue. Here they get assigned a TSN and then await 1074 * sending. The stream seq comes when it is first put in the 1075 * individual str queue 1076 */ 1077 unsigned int stream_queue_cnt; 1078 unsigned int send_queue_cnt; 1079 unsigned int sent_queue_cnt; 1080 unsigned int sent_queue_cnt_removeable; 1081 /* 1082 * Number on sent queue that are marked for retran until this value 1083 * is 0 we only send one packet of retran'ed data. 1084 */ 1085 unsigned int sent_queue_retran_cnt; 1086 1087 unsigned int size_on_reasm_queue; 1088 unsigned int cnt_on_reasm_queue; 1089 unsigned int fwd_tsn_cnt; 1090 /* amount of data (bytes) currently in flight (on all destinations) */ 1091 unsigned int total_flight; 1092 /* Total book size in flight */ 1093 unsigned int total_flight_count; /* count of chunks used with 1094 * book total */ 1095 /* count of destinaton nets and list of destination nets */ 1096 unsigned int numnets; 1097 1098 /* Total error count on this association */ 1099 unsigned int overall_error_count; 1100 1101 unsigned int cnt_msg_on_sb; 1102 1103 /* All stream count of chunks for delivery */ 1104 unsigned int size_on_all_streams; 1105 unsigned int cnt_on_all_streams; 1106 1107 /* Heart Beat delay in ms */ 1108 uint32_t heart_beat_delay; 1109 1110 /* autoclose */ 1111 uint32_t sctp_autoclose_ticks; 1112 1113 /* how many preopen streams we have */ 1114 unsigned int pre_open_streams; 1115 1116 /* How many streams I support coming into me */ 1117 unsigned int max_inbound_streams; 1118 1119 /* the cookie life I award for any cookie, in seconds */ 1120 uint32_t cookie_life; 1121 /* time to delay acks for */ 1122 unsigned int delayed_ack; 1123 unsigned int old_delayed_ack; 1124 unsigned int sack_freq; 1125 unsigned int data_pkts_seen; 1126 1127 unsigned int numduptsns; 1128 int dup_tsns[SCTP_MAX_DUP_TSNS]; 1129 uint32_t initial_init_rto_max; /* initial RTO for INIT's */ 1130 uint32_t initial_rto; /* initial send RTO */ 1131 uint32_t minrto; /* per assoc RTO-MIN */ 1132 uint32_t maxrto; /* per assoc RTO-MAX */ 1133 1134 /* authentication fields */ 1135 sctp_auth_chklist_t *local_auth_chunks; 1136 sctp_auth_chklist_t *peer_auth_chunks; 1137 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 1138 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 1139 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 1140 sctp_authinfo_t authinfo; /* randoms, cached keys */ 1141 /* 1142 * refcnt to block freeing when a sender or receiver is off coping 1143 * user data in. 1144 */ 1145 uint32_t refcnt; 1146 uint32_t chunks_on_out_queue; /* total chunks floating around, 1147 * locked by send socket buffer */ 1148 uint32_t peers_adaptation; 1149 uint32_t default_mtu; 1150 uint16_t peer_hmac_id; /* peer HMAC id to send */ 1151 1152 /* 1153 * Being that we have no bag to collect stale cookies, and that we 1154 * really would not want to anyway.. we will count them in this 1155 * counter. We of course feed them to the pigeons right away (I have 1156 * always thought of pigeons as flying rats). 1157 */ 1158 uint16_t stale_cookie_count; 1159 1160 /* 1161 * For the partial delivery API, if up, invoked this is what last 1162 * TSN I delivered 1163 */ 1164 uint16_t str_of_pdapi; 1165 uint16_t ssn_of_pdapi; 1166 1167 /* counts of actual built streams. Allocation may be more however */ 1168 /* could re-arrange to optimize space here. */ 1169 uint16_t streamincnt; 1170 uint16_t streamoutcnt; 1171 uint16_t strm_realoutsize; 1172 uint16_t strm_pending_add_size; 1173 /* my maximum number of retrans of INIT and SEND */ 1174 /* copied from SCTP but should be individually setable */ 1175 uint16_t max_init_times; 1176 uint16_t max_send_times; 1177 1178 uint16_t def_net_failure; 1179 1180 uint16_t def_net_pf_threshold; 1181 1182 /* 1183 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 1184 * awaiting ACK 1185 */ 1186 uint16_t mapping_array_size; 1187 1188 uint16_t last_strm_seq_delivered; 1189 uint16_t last_strm_no_delivered; 1190 1191 uint16_t last_revoke_count; 1192 int16_t num_send_timers_up; 1193 1194 uint16_t stream_locked_on; 1195 uint16_t ecn_echo_cnt_onq; 1196 1197 uint16_t free_chunk_cnt; 1198 uint8_t stream_locked; 1199 uint8_t authenticated; /* packet authenticated ok */ 1200 /* 1201 * This flag indicates that a SACK need to be sent. 1202 * Initially this is 1 to send the first sACK immediately. 1203 */ 1204 uint8_t send_sack; 1205 1206 /* max burst of new packets into the network */ 1207 uint32_t max_burst; 1208 /* max burst of fast retransmit packets */ 1209 uint32_t fr_max_burst; 1210 1211 uint8_t sat_network; /* RTT is in range of sat net or greater */ 1212 uint8_t sat_network_lockout; /* lockout code */ 1213 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 1214 /* flag goes on when we are doing a partial delivery api */ 1215 uint8_t hb_random_values[4]; 1216 uint8_t fragmented_delivery_inprogress; 1217 uint8_t fragment_flags; 1218 uint8_t last_flags_delivered; 1219 uint8_t hb_ect_randombit; 1220 uint8_t hb_random_idx; 1221 uint8_t default_dscp; 1222 uint8_t asconf_del_pending; /* asconf delete last addr pending */ 1223 uint8_t trigger_reset; 1224 /* 1225 * This value, plus all other ack'd but above cum-ack is added 1226 * together to cross check against the bit that we have yet to 1227 * define (probably in the SACK). When the cum-ack is updated, this 1228 * sum is updated as well. 1229 */ 1230 1231 /* Flags whether an extension is supported or not */ 1232 uint8_t ecn_supported; 1233 uint8_t prsctp_supported; 1234 uint8_t auth_supported; 1235 uint8_t asconf_supported; 1236 uint8_t reconfig_supported; 1237 uint8_t nrsack_supported; 1238 uint8_t pktdrop_supported; 1239 uint8_t idata_supported; 1240 1241 /* Did the peer make the stream config (add out) request */ 1242 uint8_t peer_req_out; 1243 1244 uint8_t local_strreset_support; 1245 uint8_t peer_supports_nat; 1246 1247 struct sctp_scoping scope; 1248 /* flags to handle send alternate net tracking */ 1249 uint8_t used_alt_asconfack; 1250 uint8_t fast_retran_loss_recovery; 1251 uint8_t sat_t3_loss_recovery; 1252 uint8_t dropped_special_cnt; 1253 uint8_t seen_a_sack_this_pkt; 1254 uint8_t stream_reset_outstanding; 1255 uint8_t stream_reset_out_is_outstanding; 1256 uint8_t delayed_connection; 1257 uint8_t ifp_had_enobuf; 1258 uint8_t saw_sack_with_frags; 1259 uint8_t saw_sack_with_nr_frags; 1260 uint8_t in_asocid_hash; 1261 uint8_t assoc_up_sent; 1262 uint8_t adaptation_needed; 1263 uint8_t adaptation_sent; 1264 /* CMT variables */ 1265 uint8_t cmt_dac_pkts_rcvd; 1266 uint8_t sctp_cmt_on_off; 1267 uint8_t iam_blocking; 1268 uint8_t cookie_how[8]; 1269 /* JRS 5/21/07 - CMT PF variable */ 1270 uint8_t sctp_cmt_pf; 1271 uint8_t use_precise_time; 1272 uint64_t sctp_features; 1273 uint32_t max_cwnd; 1274 uint16_t port; /* remote UDP encapsulation port */ 1275 /* 1276 * The mapping array is used to track out of order sequences above 1277 * last_acked_seq. 0 indicates packet missing 1 indicates packet 1278 * rec'd. We slide it up every time we raise last_acked_seq and 0 1279 * trailing locactions out. If I get a TSN above the array 1280 * mappingArraySz, I discard the datagram and let retransmit happen. 1281 */ 1282 uint32_t marked_retrans; 1283 uint32_t timoinit; 1284 uint32_t timodata; 1285 uint32_t timosack; 1286 uint32_t timoshutdown; 1287 uint32_t timoheartbeat; 1288 uint32_t timocookie; 1289 uint32_t timoshutdownack; 1290 struct timeval start_time; 1291 struct timeval discontinuity_time; 1292 uint64_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 1293 uint64_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 1294 }; 1295 1296 #endif 1297