1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifdef __FreeBSD__ 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD: head/sys/netinet/sctp_structs.h 255190 2013-09-03 19:31:59Z tuexen $"); 36 #endif 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 #if defined(__FreeBSD__) && __FreeBSD_version >= 800000 57 void *vnet; 58 #endif 59 60 /* for sanity checking */ 61 void *self; 62 uint32_t ticks; 63 uint32_t stopped_from; 64 }; 65 66 67 struct sctp_foo_stuff { 68 struct sctp_inpcb *inp; 69 uint32_t lineno; 70 uint32_t ticks; 71 int updown; 72 }; 73 74 75 /* 76 * This is the information we track on each interface that we know about from 77 * the distant end. 78 */ 79 TAILQ_HEAD(sctpnetlisthead, sctp_nets); 80 81 struct sctp_stream_reset_list { 82 TAILQ_ENTRY(sctp_stream_reset_list) next_resp; 83 uint32_t tsn; 84 uint32_t number_entries; 85 uint16_t list_of_streams[]; 86 }; 87 88 TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list); 89 90 /* 91 * Users of the iterator need to malloc a iterator with a call to 92 * sctp_initiate_iterator(inp_func, assoc_func, inp_func, pcb_flags, pcb_features, 93 * asoc_state, void-ptr-arg, uint32-arg, end_func, inp); 94 * 95 * Use the following two defines if you don't care what pcb flags are on the EP 96 * and/or you don't care what state the association is in. 97 * 98 * Note that if you specify an INP as the last argument then ONLY each 99 * association of that single INP will be executed upon. Note that the pcb 100 * flags STILL apply so if the inp you specify has different pcb_flags then 101 * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to 102 * assure the inp you specify gets treated. 103 */ 104 #define SCTP_PCB_ANY_FLAGS 0x00000000 105 #define SCTP_PCB_ANY_FEATURES 0x00000000 106 #define SCTP_ASOC_ANY_STATE 0x00000000 107 108 typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr, 109 uint32_t val); 110 typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val); 111 typedef void (*end_func) (void *ptr, uint32_t val); 112 113 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 114 /* whats on the mcore control struct */ 115 struct sctp_mcore_queue { 116 TAILQ_ENTRY(sctp_mcore_queue) next; 117 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000 118 struct vnet *vn; 119 #endif 120 struct mbuf *m; 121 int off; 122 int v6; 123 }; 124 125 TAILQ_HEAD(sctp_mcore_qhead, sctp_mcore_queue); 126 127 struct sctp_mcore_ctrl { 128 SCTP_PROCESS_STRUCT thread_proc; 129 struct sctp_mcore_qhead que; 130 struct mtx core_mtx; 131 struct mtx que_mtx; 132 int running; 133 int cpuid; 134 }; 135 136 137 #endif 138 139 140 struct sctp_iterator { 141 TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr; 142 #if defined(__FreeBSD__) && __FreeBSD_version >= 801000 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 int 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__) 185 struct mtx ipi_iterator_wq_mtx; 186 struct mtx it_mtx; 187 #elif defined(__APPLE__) 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(__Windows__) 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(__Windows__) 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__) 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 sctp_rtentry_t *ro_rt; 229 #if defined(__FreeBSD__) 230 #if __FreeBSD_version >= 800000 231 void *ro_lle; 232 #endif 233 #if __FreeBSD_version >= 900000 234 void *ro_ia; 235 int ro_flags; 236 #endif 237 #endif 238 #if defined(__APPLE__) 239 #if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION) 240 struct ifaddr *ro_srcia; 241 #endif 242 #if !defined(APPLE_LEOPARD) 243 uint32_t ro_flags; 244 #endif 245 #endif 246 union sctp_sockstore _l_addr; /* remote peer addr */ 247 struct sctp_ifa *_s_addr; /* our selected src addr */ 248 }; 249 250 struct htcp { 251 uint16_t alpha; /* Fixed point arith, << 7 */ 252 uint8_t beta; /* Fixed point arith, << 7 */ 253 uint8_t modeswitch; /* Delay modeswitch until we had at least one congestion event */ 254 uint32_t last_cong; /* Time since last congestion event end */ 255 uint32_t undo_last_cong; 256 uint16_t bytes_acked; 257 uint32_t bytecount; 258 uint32_t minRTT; 259 uint32_t maxRTT; 260 261 uint32_t undo_maxRTT; 262 uint32_t undo_old_maxB; 263 264 /* Bandwidth estimation */ 265 uint32_t minB; 266 uint32_t maxB; 267 uint32_t old_maxB; 268 uint32_t Bi; 269 uint32_t lasttime; 270 }; 271 272 struct rtcc_cc { 273 struct timeval tls; /* The time we started the sending */ 274 uint64_t lbw; /* Our last estimated bw */ 275 uint64_t lbw_rtt; /* RTT at bw estimate */ 276 uint64_t bw_bytes; /* The total bytes since this sending began */ 277 uint64_t bw_tot_time; /* The total time since sending began */ 278 uint64_t new_tot_time; /* temp holding the new value */ 279 uint64_t bw_bytes_at_last_rttc; /* What bw_bytes was at last rtt calc */ 280 uint32_t cwnd_at_bw_set; /* Cwnd at last bw saved - lbw */ 281 uint32_t vol_reduce; /* cnt of voluntary reductions */ 282 uint16_t steady_step; /* The number required to be in steady state*/ 283 uint16_t step_cnt; /* The current number */ 284 uint8_t ret_from_eq; /* When all things are equal what do I return 0/1 - 1 no cc advance */ 285 uint8_t use_dccc_ecn; /* Flag to enable DCCC ECN */ 286 uint8_t tls_needs_set; /* Flag to indicate we need to set tls 0 or 1 means set at send 2 not */ 287 uint8_t last_step_state; /* Last state if steady state stepdown is on */ 288 uint8_t rtt_set_this_sack; /* Flag saying this sack had RTT calc on it */ 289 uint8_t last_inst_ind; /* Last saved inst indication */ 290 }; 291 292 293 struct sctp_nets { 294 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */ 295 296 /* 297 * Things on the top half may be able to be split into a common 298 * structure shared by all. 299 */ 300 struct sctp_timer pmtu_timer; 301 struct sctp_timer hb_timer; 302 303 /* 304 * The following two in combination equate to a route entry for v6 305 * or v4. 306 */ 307 struct sctp_net_route ro; 308 309 /* mtu discovered so far */ 310 uint32_t mtu; 311 uint32_t ssthresh; /* not sure about this one for split */ 312 uint32_t last_cwr_tsn; 313 uint32_t cwr_window_tsn; 314 uint32_t ecn_ce_pkt_cnt; 315 uint32_t lost_cnt; 316 /* smoothed average things for RTT and RTO itself */ 317 int lastsa; 318 int lastsv; 319 uint64_t rtt; /* last measured rtt value in us */ 320 unsigned int RTO; 321 322 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */ 323 struct sctp_timer rxt_timer; 324 325 /* last time in seconds I sent to it */ 326 struct timeval last_sent_time; 327 union cc_control_data { 328 struct htcp htcp_ca; /* JRS - struct used in HTCP algorithm */ 329 struct rtcc_cc rtcc; /* rtcc module cc stuff */ 330 } cc_mod; 331 int ref_count; 332 333 /* Congestion stats per destination */ 334 /* 335 * flight size variables and such, sorry Vern, I could not avoid 336 * this if I wanted performance :> 337 */ 338 uint32_t flight_size; 339 uint32_t cwnd; /* actual cwnd */ 340 uint32_t prev_cwnd; /* cwnd before any processing */ 341 uint32_t ecn_prev_cwnd; /* ECN prev cwnd at first ecn_echo seen in new window */ 342 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */ 343 /* tracking variables to avoid the aloc/free in sack processing */ 344 unsigned int net_ack; 345 unsigned int net_ack2; 346 347 /* 348 * JRS - 5/8/07 - Variable to track last time 349 * a destination was active for CMT PF 350 */ 351 uint32_t last_active; 352 353 /* 354 * CMT variables (iyengar@cis.udel.edu) 355 */ 356 uint32_t this_sack_highest_newack; /* tracks highest TSN newly 357 * acked for a given dest in 358 * the current SACK. Used in 359 * SFR and HTNA algos */ 360 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected 361 * pseudo-cumack for this destination */ 362 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next 363 * expected pseudo-cumack for this 364 * destination */ 365 366 /* CMT fast recovery variables */ 367 uint32_t fast_recovery_tsn; 368 uint32_t heartbeat_random1; 369 uint32_t heartbeat_random2; 370 #ifdef INET6 371 uint32_t flowlabel; 372 #endif 373 uint8_t dscp; 374 375 struct timeval start_time; /* time when this net was created */ 376 uint32_t marked_retrans; /* number or DATA chunks marked for 377 timer based retransmissions */ 378 uint32_t marked_fastretrans; 379 uint32_t heart_beat_delay; /* Heart Beat delay in ms */ 380 381 /* if this guy is ok or not ... status */ 382 uint16_t dest_state; 383 /* number of timeouts to consider the destination unreachable */ 384 uint16_t failure_threshold; 385 /* number of timeouts to consider the destination potentially failed */ 386 uint16_t pf_threshold; 387 /* error stats on the destination */ 388 uint16_t error_count; 389 /* UDP port number in case of UDP tunneling */ 390 uint16_t port; 391 392 uint8_t fast_retran_loss_recovery; 393 uint8_t will_exit_fast_recovery; 394 /* Flags that probably can be combined into dest_state */ 395 uint8_t fast_retran_ip; /* fast retransmit in progress */ 396 uint8_t hb_responded; 397 uint8_t saw_newack; /* CMT's SFR algorithm flag */ 398 uint8_t src_addr_selected; /* if we split we move */ 399 uint8_t indx_of_eligible_next_to_use; 400 uint8_t addr_is_local; /* its a local address (if known) could move 401 * in split */ 402 403 /* 404 * CMT variables (iyengar@cis.udel.edu) 405 */ 406 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to 407 * find a new pseudocumack. This flag 408 * is set after a new pseudo-cumack 409 * has been received and indicates 410 * that the sender should find the 411 * next pseudo-cumack expected for 412 * this destination */ 413 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to 414 * find a new rtx-pseudocumack. This 415 * flag is set after a new 416 * rtx-pseudo-cumack has been received 417 * and indicates that the sender 418 * should find the next 419 * rtx-pseudo-cumack expected for this 420 * destination */ 421 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to 422 * indicate if a new pseudo-cumack or 423 * rtx-pseudo-cumack has been received */ 424 uint8_t window_probe; /* Doing a window probe? */ 425 uint8_t RTO_measured; /* Have we done the first measure */ 426 uint8_t last_hs_used; /* index into the last HS table entry we used */ 427 uint8_t lan_type; 428 uint8_t rto_needed; 429 #if defined(__FreeBSD__) 430 uint32_t flowid; 431 #ifdef INVARIANTS 432 uint8_t flowidset; 433 #endif 434 #endif 435 }; 436 437 438 struct sctp_data_chunkrec { 439 uint32_t TSN_seq; /* the TSN of this transmit */ 440 uint16_t stream_seq; /* the stream sequence number of this transmit */ 441 uint16_t stream_number; /* the stream number of this guy */ 442 uint32_t payloadtype; 443 uint32_t context; /* from send */ 444 uint32_t cwnd_at_send; 445 /* 446 * part of the Highest sacked algorithm to be able to stroke counts 447 * on ones that are FR'd. 448 */ 449 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 450 struct timeval timetodrop; /* time we drop it from queue */ 451 uint8_t doing_fast_retransmit; 452 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 453 * outbound holds sending flags for PR-SCTP. 454 */ 455 uint8_t state_flags; 456 uint8_t chunk_was_revoked; 457 uint8_t fwd_tsn_cnt; 458 }; 459 460 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 461 462 /* The lower byte is used to enumerate PR_SCTP policies */ 463 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 464 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 465 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 466 467 /* The upper byte is used as a bit mask */ 468 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100 469 470 struct chk_id { 471 uint16_t id; 472 uint16_t can_take_data; 473 }; 474 475 476 struct sctp_tmit_chunk { 477 union { 478 struct sctp_data_chunkrec data; 479 struct chk_id chunk_id; 480 } rec; 481 struct sctp_association *asoc; /* bp to asoc this belongs to */ 482 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 483 struct mbuf *data; /* pointer to mbuf chain of data */ 484 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 485 struct sctp_nets *whoTo; 486 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 487 int32_t sent; /* the send status */ 488 uint16_t snd_count; /* number of times I sent */ 489 uint16_t flags; /* flags, such as FRAGMENT_OK */ 490 uint16_t send_size; 491 uint16_t book_size; 492 uint16_t mbcnt; 493 uint16_t auth_keyid; 494 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */ 495 uint8_t pad_inplace; 496 uint8_t do_rtt; 497 uint8_t book_size_scale; 498 uint8_t no_fr_allowed; 499 uint8_t copy_by_ref; 500 uint8_t window_probe; 501 }; 502 503 /* 504 * The first part of this structure MUST be the entire sinfo structure. Maybe 505 * I should have made it a sub structure... we can circle back later and do 506 * that if we want. 507 */ 508 struct sctp_queued_to_read { /* sinfo structure Pluse more */ 509 uint16_t sinfo_stream; /* off the wire */ 510 uint16_t sinfo_ssn; /* 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 length; /* length of data */ 521 uint32_t held_length; /* length held in sb */ 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 uint16_t port_from; 530 uint16_t spec_flags; /* Flags to hold the notification field */ 531 uint8_t do_not_ref_stcb; 532 uint8_t end_added; 533 uint8_t pdapi_aborted; 534 uint8_t some_taken; 535 }; 536 537 /* This data structure will be on the outbound 538 * stream queues. Data will be pulled off from 539 * the front of the mbuf data and chunk-ified 540 * by the output routines. We will custom 541 * fit every chunk we pull to the send/sent 542 * queue to make up the next full packet 543 * if we can. An entry cannot be removed 544 * from the stream_out queue until 545 * the msg_is_complete flag is set. This 546 * means at times data/tail_mbuf MIGHT 547 * be NULL.. If that occurs it happens 548 * for one of two reasons. Either the user 549 * is blocked on a send() call and has not 550 * awoken to copy more data down... OR 551 * the user is in the explict MSG_EOR mode 552 * and wrote some data, but has not completed 553 * sending. 554 */ 555 struct sctp_stream_queue_pending { 556 struct mbuf *data; 557 struct mbuf *tail_mbuf; 558 struct timeval ts; 559 struct sctp_nets *net; 560 TAILQ_ENTRY (sctp_stream_queue_pending) next; 561 TAILQ_ENTRY (sctp_stream_queue_pending) ss_next; 562 uint32_t length; 563 uint32_t timetolive; 564 uint32_t ppid; 565 uint32_t context; 566 uint16_t sinfo_flags; 567 uint16_t stream; 568 uint16_t act_flags; 569 uint16_t auth_keyid; 570 uint8_t holds_key_ref; 571 uint8_t msg_is_complete; 572 uint8_t some_taken; 573 uint8_t sender_all_done; 574 uint8_t put_last_out; 575 uint8_t discard_rest; 576 }; 577 578 /* 579 * this struct contains info that is used to track inbound stream data and 580 * help with ordering. 581 */ 582 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 583 struct sctp_stream_in { 584 struct sctp_readhead inqueue; 585 uint16_t stream_no; 586 uint16_t last_sequence_delivered; /* used for re-order */ 587 uint8_t delivery_started; 588 }; 589 590 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 591 TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending); 592 593 /* Round-robin schedulers */ 594 struct ss_rr { 595 /* next link in wheel */ 596 TAILQ_ENTRY(sctp_stream_out) next_spoke; 597 }; 598 599 /* Priority scheduler */ 600 struct ss_prio { 601 /* next link in wheel */ 602 TAILQ_ENTRY(sctp_stream_out) next_spoke; 603 /* priority id */ 604 uint16_t priority; 605 }; 606 607 /* Fair Bandwidth scheduler */ 608 struct ss_fb { 609 /* next link in wheel */ 610 TAILQ_ENTRY(sctp_stream_out) next_spoke; 611 /* stores message size */ 612 int32_t rounds; 613 }; 614 615 /* 616 * This union holds all data necessary for 617 * different stream schedulers. 618 */ 619 union scheduling_data { 620 struct sctpwheel_listhead out_wheel; 621 struct sctplist_listhead out_list; 622 }; 623 624 /* 625 * This union holds all parameters per stream 626 * necessary for different stream schedulers. 627 */ 628 union scheduling_parameters { 629 struct ss_rr rr; 630 struct ss_prio prio; 631 struct ss_fb fb; 632 }; 633 634 /* This struct is used to track the traffic on outbound streams */ 635 struct sctp_stream_out { 636 struct sctp_streamhead outqueue; 637 union scheduling_parameters ss_params; 638 uint32_t chunks_on_queues; 639 uint16_t stream_no; 640 uint16_t next_sequence_send; /* next one I expect to send out */ 641 uint8_t last_msg_incomplete; 642 }; 643 644 /* used to keep track of the addresses yet to try to add/delete */ 645 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 646 struct sctp_asconf_addr { 647 TAILQ_ENTRY(sctp_asconf_addr) next; 648 struct sctp_asconf_addr_param ap; 649 struct sctp_ifa *ifa; /* save the ifa for add/del ip */ 650 uint8_t sent; /* has this been sent yet? */ 651 uint8_t special_del; /* not to be used in lookup */ 652 }; 653 654 struct sctp_scoping { 655 uint8_t ipv4_addr_legal; 656 uint8_t ipv6_addr_legal; 657 #if defined(__Userspace__) 658 uint8_t conn_addr_legal; 659 #endif 660 uint8_t loopback_scope; 661 uint8_t ipv4_local_scope; 662 uint8_t local_scope; 663 uint8_t site_scope; 664 }; 665 666 #define SCTP_TSN_LOG_SIZE 40 667 668 struct sctp_tsn_log { 669 void *stcb; 670 uint32_t tsn; 671 uint16_t strm; 672 uint16_t seq; 673 uint16_t sz; 674 uint16_t flgs; 675 uint16_t in_pos; 676 uint16_t in_out; 677 }; 678 679 #define SCTP_FS_SPEC_LOG_SIZE 200 680 struct sctp_fs_spec_log { 681 uint32_t sent; 682 uint32_t total_flight; 683 uint32_t tsn; 684 uint16_t book; 685 uint8_t incr; 686 uint8_t decr; 687 }; 688 689 /* This struct is here to cut out the compatiabilty 690 * pad that bulks up both the inp and stcb. The non 691 * pad portion MUST stay in complete sync with 692 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added 693 * this must be done here too. 694 */ 695 struct sctp_nonpad_sndrcvinfo { 696 uint16_t sinfo_stream; 697 uint16_t sinfo_ssn; 698 uint16_t sinfo_flags; 699 uint32_t sinfo_ppid; 700 uint32_t sinfo_context; 701 uint32_t sinfo_timetolive; 702 uint32_t sinfo_tsn; 703 uint32_t sinfo_cumtsn; 704 sctp_assoc_t sinfo_assoc_id; 705 uint16_t sinfo_keynumber; 706 uint16_t sinfo_keynumber_valid; 707 }; 708 709 /* 710 * JRS - Structure to hold function pointers to the functions responsible 711 * for congestion control. 712 */ 713 714 struct sctp_cc_functions { 715 void (*sctp_set_initial_cc_param)(struct sctp_tcb *stcb, struct sctp_nets *net); 716 void (*sctp_cwnd_update_after_sack)(struct sctp_tcb *stcb, 717 struct sctp_association *asoc, 718 int accum_moved ,int reneged_all, int will_exit); 719 void (*sctp_cwnd_update_exit_pf)(struct sctp_tcb *stcb, struct sctp_nets *net); 720 void (*sctp_cwnd_update_after_fr)(struct sctp_tcb *stcb, 721 struct sctp_association *asoc); 722 void (*sctp_cwnd_update_after_timeout)(struct sctp_tcb *stcb, 723 struct sctp_nets *net); 724 void (*sctp_cwnd_update_after_ecn_echo)(struct sctp_tcb *stcb, 725 struct sctp_nets *net, int in_window, int num_pkt_lost); 726 void (*sctp_cwnd_update_after_packet_dropped)(struct sctp_tcb *stcb, 727 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp, 728 uint32_t *bottle_bw, uint32_t *on_queue); 729 void (*sctp_cwnd_update_after_output)(struct sctp_tcb *stcb, 730 struct sctp_nets *net, int burst_limit); 731 void (*sctp_cwnd_update_packet_transmitted)(struct sctp_tcb *stcb, 732 struct sctp_nets *net); 733 void (*sctp_cwnd_update_tsn_acknowledged)(struct sctp_nets *net, 734 struct sctp_tmit_chunk *); 735 void (*sctp_cwnd_new_transmission_begins)(struct sctp_tcb *stcb, 736 struct sctp_nets *net); 737 void (*sctp_cwnd_prepare_net_for_sack)(struct sctp_tcb *stcb, 738 struct sctp_nets *net); 739 int (*sctp_cwnd_socket_option)(struct sctp_tcb *stcb, int set, struct sctp_cc_option *); 740 void (*sctp_rtt_calculated)(struct sctp_tcb *, struct sctp_nets *, struct timeval *); 741 }; 742 743 /* 744 * RS - Structure to hold function pointers to the functions responsible 745 * for stream scheduling. 746 */ 747 struct sctp_ss_functions { 748 void (*sctp_ss_init)(struct sctp_tcb *stcb, struct sctp_association *asoc, 749 int holds_lock); 750 void (*sctp_ss_clear)(struct sctp_tcb *stcb, struct sctp_association *asoc, 751 int clear_values, int holds_lock); 752 void (*sctp_ss_init_stream)(struct sctp_stream_out *strq, struct sctp_stream_out *with_strq); 753 void (*sctp_ss_add_to_stream)(struct sctp_tcb *stcb, struct sctp_association *asoc, 754 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 755 int (*sctp_ss_is_empty)(struct sctp_tcb *stcb, struct sctp_association *asoc); 756 void (*sctp_ss_remove_from_stream)(struct sctp_tcb *stcb, struct sctp_association *asoc, 757 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 758 struct sctp_stream_out* (*sctp_ss_select_stream)(struct sctp_tcb *stcb, 759 struct sctp_nets *net, struct sctp_association *asoc); 760 void (*sctp_ss_scheduled)(struct sctp_tcb *stcb, struct sctp_nets *net, 761 struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much); 762 void (*sctp_ss_packet_done)(struct sctp_tcb *stcb, struct sctp_nets *net, 763 struct sctp_association *asoc); 764 int (*sctp_ss_get_value)(struct sctp_tcb *stcb, struct sctp_association *asoc, 765 struct sctp_stream_out *strq, uint16_t *value); 766 int (*sctp_ss_set_value)(struct sctp_tcb *stcb, struct sctp_association *asoc, 767 struct sctp_stream_out *strq, uint16_t value); 768 }; 769 770 /* used to save ASCONF chunks for retransmission */ 771 TAILQ_HEAD(sctp_asconf_head, sctp_asconf); 772 struct sctp_asconf { 773 TAILQ_ENTRY(sctp_asconf) next; 774 uint32_t serial_number; 775 uint16_t snd_count; 776 struct mbuf *data; 777 uint16_t len; 778 }; 779 780 /* used to save ASCONF-ACK chunks for retransmission */ 781 TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack); 782 struct sctp_asconf_ack { 783 TAILQ_ENTRY(sctp_asconf_ack) next; 784 uint32_t serial_number; 785 struct sctp_nets *last_sent_to; 786 struct mbuf *data; 787 uint16_t len; 788 }; 789 790 /* 791 * Here we have information about each individual association that we track. 792 * We probably in production would be more dynamic. But for ease of 793 * implementation we will have a fixed array that we hunt for in a linear 794 * fashion. 795 */ 796 struct sctp_association { 797 /* association state */ 798 int state; 799 800 /* queue of pending addrs to add/delete */ 801 struct sctp_asconf_addrhead asconf_queue; 802 803 struct timeval time_entered; /* time we entered state */ 804 struct timeval time_last_rcvd; 805 struct timeval time_last_sent; 806 struct timeval time_last_sat_advance; 807 struct sctp_nonpad_sndrcvinfo def_send; 808 809 /* timers and such */ 810 struct sctp_timer dack_timer; /* Delayed ack timer */ 811 struct sctp_timer asconf_timer; /* asconf */ 812 struct sctp_timer strreset_timer; /* stream reset */ 813 struct sctp_timer shut_guard_timer; /* shutdown guard */ 814 struct sctp_timer autoclose_timer; /* automatic close timer */ 815 struct sctp_timer delayed_event_timer; /* timer for delayed events */ 816 struct sctp_timer delete_prim_timer; /* deleting primary dst */ 817 818 /* list of restricted local addresses */ 819 struct sctpladdr sctp_restricted_addrs; 820 821 /* last local address pending deletion (waiting for an address add) */ 822 struct sctp_ifa *asconf_addr_del_pending; 823 /* Deleted primary destination (used to stop timer) */ 824 struct sctp_nets *deleted_primary; 825 826 struct sctpnetlisthead nets; /* remote address list */ 827 828 /* Free chunk list */ 829 struct sctpchunk_listhead free_chunks; 830 831 /* Control chunk queue */ 832 struct sctpchunk_listhead control_send_queue; 833 834 /* ASCONF chunk queue */ 835 struct sctpchunk_listhead asconf_send_queue; 836 837 /* 838 * Once a TSN hits the wire it is moved to the sent_queue. We 839 * maintain two counts here (don't know if any but retran_cnt is 840 * needed). The idea is that the sent_queue_retran_cnt reflects how 841 * many chunks have been marked for retranmission by either T3-rxt 842 * or FR. 843 */ 844 struct sctpchunk_listhead sent_queue; 845 struct sctpchunk_listhead send_queue; 846 847 /* re-assembly queue for fragmented chunks on the inbound path */ 848 struct sctpchunk_listhead reasmqueue; 849 850 /* Scheduling queues */ 851 union scheduling_data ss_data; 852 853 /* This pointer will be set to NULL 854 * most of the time. But when we have 855 * a fragmented message, where we could 856 * not get out all of the message at 857 * the last send then this will point 858 * to the stream to go get data from. 859 */ 860 struct sctp_stream_out *locked_on_sending; 861 862 /* If an iterator is looking at me, this is it */ 863 struct sctp_iterator *stcb_starting_point_for_iterator; 864 865 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 866 struct sctp_asconf_ackhead asconf_ack_sent; 867 868 /* 869 * pointer to last stream reset queued to control queue by us with 870 * requests. 871 */ 872 struct sctp_tmit_chunk *str_reset; 873 /* 874 * if Source Address Selection happening, this will rotate through 875 * the link list. 876 */ 877 struct sctp_laddr *last_used_address; 878 879 /* stream arrays */ 880 struct sctp_stream_in *strmin; 881 struct sctp_stream_out *strmout; 882 uint8_t *mapping_array; 883 /* primary destination to use */ 884 struct sctp_nets *primary_destination; 885 struct sctp_nets *alternate; /* If primary is down or PF */ 886 /* For CMT */ 887 struct sctp_nets *last_net_cmt_send_started; 888 /* last place I got a data chunk from */ 889 struct sctp_nets *last_data_chunk_from; 890 /* last place I got a control from */ 891 struct sctp_nets *last_control_chunk_from; 892 893 /* circular looking for output selection */ 894 struct sctp_stream_out *last_out_stream; 895 896 /* 897 * wait to the point the cum-ack passes req->send_reset_at_tsn for 898 * any req on the list. 899 */ 900 struct sctp_resethead resetHead; 901 902 /* queue of chunks waiting to be sent into the local stack */ 903 struct sctp_readhead pending_reply_queue; 904 905 /* JRS - the congestion control functions are in this struct */ 906 struct sctp_cc_functions cc_functions; 907 /* JRS - value to store the currently loaded congestion control module */ 908 uint32_t congestion_control_module; 909 /* RS - the stream scheduling functions are in this struct */ 910 struct sctp_ss_functions ss_functions; 911 /* RS - value to store the currently loaded stream scheduling module */ 912 uint32_t stream_scheduling_module; 913 914 uint32_t vrf_id; 915 916 uint32_t cookie_preserve_req; 917 /* ASCONF next seq I am sending out, inits at init-tsn */ 918 uint32_t asconf_seq_out; 919 uint32_t asconf_seq_out_acked; 920 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 921 uint32_t asconf_seq_in; 922 923 /* next seq I am sending in str reset messages */ 924 uint32_t str_reset_seq_out; 925 /* next seq I am expecting in str reset messages */ 926 uint32_t str_reset_seq_in; 927 928 /* various verification tag information */ 929 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 930 * by remote end, and I have unlocked this 931 * will be regenerated to a new random value. */ 932 uint32_t peer_vtag; /* The peers last tag */ 933 934 uint32_t my_vtag_nonce; 935 uint32_t peer_vtag_nonce; 936 937 uint32_t assoc_id; 938 939 /* This is the SCTP fragmentation threshold */ 940 uint32_t smallest_mtu; 941 942 /* 943 * Special hook for Fast retransmit, allows us to track the highest 944 * TSN that is NEW in this SACK if gap ack blocks are present. 945 */ 946 uint32_t this_sack_highest_gap; 947 948 /* 949 * The highest consecutive TSN that has been acked by peer on my 950 * sends 951 */ 952 uint32_t last_acked_seq; 953 954 /* The next TSN that I will use in sending. */ 955 uint32_t sending_seq; 956 957 /* Original seq number I used ??questionable to keep?? */ 958 uint32_t init_seq_number; 959 960 961 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 962 /* (A1 in Section 4.2) */ 963 uint32_t advanced_peer_ack_point; 964 965 /* 966 * The highest consequetive TSN at the bottom of the mapping array 967 * (for his sends). 968 */ 969 uint32_t cumulative_tsn; 970 /* 971 * Used to track the mapping array and its offset bits. This MAY be 972 * lower then cumulative_tsn. 973 */ 974 uint32_t mapping_array_base_tsn; 975 /* 976 * used to track highest TSN we have received and is listed in the 977 * mapping array. 978 */ 979 uint32_t highest_tsn_inside_map; 980 981 /* EY - new NR variables used for nr_sack based on mapping_array*/ 982 uint8_t *nr_mapping_array; 983 uint32_t highest_tsn_inside_nr_map; 984 985 uint32_t fast_recovery_tsn; 986 uint32_t sat_t3_recovery_tsn; 987 uint32_t tsn_last_delivered; 988 /* 989 * For the pd-api we should re-write this a bit more efficent. We 990 * could have multiple sctp_queued_to_read's that we are building at 991 * once. Now we only do this when we get ready to deliver to the 992 * socket buffer. Note that we depend on the fact that the struct is 993 * "stuck" on the read queue until we finish all the pd-api. 994 */ 995 struct sctp_queued_to_read *control_pdapi; 996 997 uint32_t tsn_of_pdapi_last_delivered; 998 uint32_t pdapi_ppid; 999 uint32_t context; 1000 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 1001 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 1002 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 1003 #ifdef SCTP_ASOCLOG_OF_TSNS 1004 /* 1005 * special log - This adds considerable size 1006 * to the asoc, but provides a log that you 1007 * can use to detect problems via kgdb. 1008 */ 1009 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE]; 1010 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE]; 1011 uint32_t cumack_log[SCTP_TSN_LOG_SIZE]; 1012 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE]; 1013 uint16_t tsn_in_at; 1014 uint16_t tsn_out_at; 1015 uint16_t tsn_in_wrapped; 1016 uint16_t tsn_out_wrapped; 1017 uint16_t cumack_log_at; 1018 uint16_t cumack_log_atsnt; 1019 #endif /* SCTP_ASOCLOG_OF_TSNS */ 1020 #ifdef SCTP_FS_SPEC_LOG 1021 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE]; 1022 uint16_t fs_index; 1023 #endif 1024 1025 /* 1026 * window state information and smallest MTU that I use to bound 1027 * segmentation 1028 */ 1029 uint32_t peers_rwnd; 1030 uint32_t my_rwnd; 1031 uint32_t my_last_reported_rwnd; 1032 uint32_t sctp_frag_point; 1033 1034 uint32_t total_output_queue_size; 1035 1036 uint32_t sb_cc; /* shadow of sb_cc */ 1037 uint32_t sb_send_resv; /* amount reserved on a send */ 1038 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd control */ 1039 #ifdef INET6 1040 uint32_t default_flowlabel; 1041 #endif 1042 uint32_t pr_sctp_cnt; 1043 int ctrl_queue_cnt; /* could be removed REM - NO IT CAN'T!! RRS */ 1044 /* 1045 * All outbound datagrams queue into this list from the individual 1046 * stream queue. Here they get assigned a TSN and then await 1047 * sending. The stream seq comes when it is first put in the 1048 * individual str queue 1049 */ 1050 unsigned int stream_queue_cnt; 1051 unsigned int send_queue_cnt; 1052 unsigned int sent_queue_cnt; 1053 unsigned int sent_queue_cnt_removeable; 1054 /* 1055 * Number on sent queue that are marked for retran until this value 1056 * is 0 we only send one packet of retran'ed data. 1057 */ 1058 unsigned int sent_queue_retran_cnt; 1059 1060 unsigned int size_on_reasm_queue; 1061 unsigned int cnt_on_reasm_queue; 1062 unsigned int fwd_tsn_cnt; 1063 /* amount of data (bytes) currently in flight (on all destinations) */ 1064 unsigned int total_flight; 1065 /* Total book size in flight */ 1066 unsigned int total_flight_count; /* count of chunks used with 1067 * book total */ 1068 /* count of destinaton nets and list of destination nets */ 1069 unsigned int numnets; 1070 1071 /* Total error count on this association */ 1072 unsigned int overall_error_count; 1073 1074 unsigned int cnt_msg_on_sb; 1075 1076 /* All stream count of chunks for delivery */ 1077 unsigned int size_on_all_streams; 1078 unsigned int cnt_on_all_streams; 1079 1080 /* Heart Beat delay in ms */ 1081 uint32_t heart_beat_delay; 1082 1083 /* autoclose */ 1084 unsigned int sctp_autoclose_ticks; 1085 1086 /* how many preopen streams we have */ 1087 unsigned int pre_open_streams; 1088 1089 /* How many streams I support coming into me */ 1090 unsigned int max_inbound_streams; 1091 1092 /* the cookie life I award for any cookie, in seconds */ 1093 unsigned int cookie_life; 1094 /* time to delay acks for */ 1095 unsigned int delayed_ack; 1096 unsigned int old_delayed_ack; 1097 unsigned int sack_freq; 1098 unsigned int data_pkts_seen; 1099 1100 unsigned int numduptsns; 1101 int dup_tsns[SCTP_MAX_DUP_TSNS]; 1102 unsigned int initial_init_rto_max; /* initial RTO for INIT's */ 1103 unsigned int initial_rto; /* initial send RTO */ 1104 unsigned int minrto; /* per assoc RTO-MIN */ 1105 unsigned int maxrto; /* per assoc RTO-MAX */ 1106 1107 /* authentication fields */ 1108 sctp_auth_chklist_t *local_auth_chunks; 1109 sctp_auth_chklist_t *peer_auth_chunks; 1110 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 1111 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 1112 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 1113 sctp_authinfo_t authinfo; /* randoms, cached keys */ 1114 /* 1115 * refcnt to block freeing when a sender or receiver is off coping 1116 * user data in. 1117 */ 1118 uint32_t refcnt; 1119 uint32_t chunks_on_out_queue; /* total chunks floating around, 1120 * locked by send socket buffer */ 1121 uint32_t peers_adaptation; 1122 uint16_t peer_hmac_id; /* peer HMAC id to send */ 1123 1124 /* 1125 * Being that we have no bag to collect stale cookies, and that we 1126 * really would not want to anyway.. we will count them in this 1127 * counter. We of course feed them to the pigeons right away (I have 1128 * always thought of pigeons as flying rats). 1129 */ 1130 uint16_t stale_cookie_count; 1131 1132 /* 1133 * For the partial delivery API, if up, invoked this is what last 1134 * TSN I delivered 1135 */ 1136 uint16_t str_of_pdapi; 1137 uint16_t ssn_of_pdapi; 1138 1139 /* counts of actual built streams. Allocation may be more however */ 1140 /* could re-arrange to optimize space here. */ 1141 uint16_t streamincnt; 1142 uint16_t streamoutcnt; 1143 uint16_t strm_realoutsize; 1144 uint16_t strm_pending_add_size; 1145 /* my maximum number of retrans of INIT and SEND */ 1146 /* copied from SCTP but should be individually setable */ 1147 uint16_t max_init_times; 1148 uint16_t max_send_times; 1149 1150 uint16_t def_net_failure; 1151 1152 uint16_t def_net_pf_threshold; 1153 1154 /* 1155 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 1156 * awaiting ACK 1157 */ 1158 uint16_t mapping_array_size; 1159 1160 uint16_t last_strm_seq_delivered; 1161 uint16_t last_strm_no_delivered; 1162 1163 uint16_t last_revoke_count; 1164 int16_t num_send_timers_up; 1165 1166 uint16_t stream_locked_on; 1167 uint16_t ecn_echo_cnt_onq; 1168 1169 uint16_t free_chunk_cnt; 1170 uint8_t stream_locked; 1171 uint8_t authenticated; /* packet authenticated ok */ 1172 /* 1173 * This flag indicates that a SACK need to be sent. 1174 * Initially this is 1 to send the first sACK immediately. 1175 */ 1176 uint8_t send_sack; 1177 1178 /* max burst of new packets into the network */ 1179 uint32_t max_burst; 1180 /* max burst of fast retransmit packets */ 1181 uint32_t fr_max_burst; 1182 1183 uint8_t sat_network; /* RTT is in range of sat net or greater */ 1184 uint8_t sat_network_lockout; /* lockout code */ 1185 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 1186 /* flag goes on when we are doing a partial delivery api */ 1187 uint8_t hb_random_values[4]; 1188 uint8_t fragmented_delivery_inprogress; 1189 uint8_t fragment_flags; 1190 uint8_t last_flags_delivered; 1191 uint8_t hb_ect_randombit; 1192 uint8_t hb_random_idx; 1193 uint8_t default_dscp; 1194 uint8_t asconf_del_pending; /* asconf delete last addr pending */ 1195 1196 /* 1197 * This value, plus all other ack'd but above cum-ack is added 1198 * together to cross check against the bit that we have yet to 1199 * define (probably in the SACK). When the cum-ack is updated, this 1200 * sum is updated as well. 1201 */ 1202 1203 /* Flag to tell if ECN is allowed */ 1204 uint8_t ecn_allowed; 1205 1206 /* Did the peer make the stream config (add out) request */ 1207 uint8_t peer_req_out; 1208 1209 /* flag to indicate if peer can do asconf */ 1210 uint8_t peer_supports_asconf; 1211 /* EY - flag to indicate if peer can do nr_sack*/ 1212 uint8_t peer_supports_nr_sack; 1213 /* pr-sctp support flag */ 1214 uint8_t peer_supports_prsctp; 1215 /* peer authentication support flag */ 1216 uint8_t peer_supports_auth; 1217 /* stream resets are supported by the peer */ 1218 uint8_t peer_supports_strreset; 1219 uint8_t local_strreset_support; 1220 1221 uint8_t peer_supports_nat; 1222 /* 1223 * packet drop's are supported by the peer, we don't really care 1224 * about this but we bookkeep it anyway. 1225 */ 1226 uint8_t peer_supports_pktdrop; 1227 1228 struct sctp_scoping scope; 1229 /* flags to handle send alternate net tracking */ 1230 uint8_t used_alt_onsack; 1231 uint8_t used_alt_asconfack; 1232 uint8_t fast_retran_loss_recovery; 1233 uint8_t sat_t3_loss_recovery; 1234 uint8_t dropped_special_cnt; 1235 uint8_t seen_a_sack_this_pkt; 1236 uint8_t stream_reset_outstanding; 1237 uint8_t stream_reset_out_is_outstanding; 1238 uint8_t delayed_connection; 1239 uint8_t ifp_had_enobuf; 1240 uint8_t saw_sack_with_frags; 1241 uint8_t saw_sack_with_nr_frags; 1242 uint8_t in_asocid_hash; 1243 uint8_t assoc_up_sent; 1244 uint8_t adaptation_needed; 1245 uint8_t adaptation_sent; 1246 /* CMT variables */ 1247 uint8_t cmt_dac_pkts_rcvd; 1248 uint8_t sctp_cmt_on_off; 1249 uint8_t iam_blocking; 1250 uint8_t cookie_how[8]; 1251 /* EY 05/05/08 - NR_SACK variable*/ 1252 uint8_t sctp_nr_sack_on_off; 1253 /* JRS 5/21/07 - CMT PF variable */ 1254 uint8_t sctp_cmt_pf; 1255 uint8_t use_precise_time; 1256 uint64_t sctp_features; 1257 uint16_t port; /* remote UDP encapsulation port */ 1258 /* 1259 * The mapping array is used to track out of order sequences above 1260 * last_acked_seq. 0 indicates packet missing 1 indicates packet 1261 * rec'd. We slide it up every time we raise last_acked_seq and 0 1262 * trailing locactions out. If I get a TSN above the array 1263 * mappingArraySz, I discard the datagram and let retransmit happen. 1264 */ 1265 uint32_t marked_retrans; 1266 uint32_t timoinit; 1267 uint32_t timodata; 1268 uint32_t timosack; 1269 uint32_t timoshutdown; 1270 uint32_t timoheartbeat; 1271 uint32_t timocookie; 1272 uint32_t timoshutdownack; 1273 struct timeval start_time; 1274 struct timeval discontinuity_time; 1275 }; 1276 1277 #endif 1278