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 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #ifndef _NETINET_SCTP_STRUCTS_H_ 37 #define _NETINET_SCTP_STRUCTS_H_ 38 39 #include <netinet/sctp_os.h> 40 #include <netinet/sctp_header.h> 41 #include <netinet/sctp_auth.h> 42 43 struct sctp_timer { 44 sctp_os_timer_t timer; 45 46 int type; 47 /* 48 * Depending on the timer type these will be setup and cast with the 49 * appropriate entity. 50 */ 51 void *ep; 52 void *tcb; 53 void *net; 54 void *vnet; 55 56 /* for sanity checking */ 57 void *self; 58 uint32_t ticks; 59 uint32_t stopped_from; 60 }; 61 62 63 struct sctp_foo_stuff { 64 struct sctp_inpcb *inp; 65 uint32_t lineno; 66 uint32_t ticks; 67 int updown; 68 }; 69 70 71 /* 72 * This is the information we track on each interface that we know about from 73 * the distant end. 74 */ 75 TAILQ_HEAD(sctpnetlisthead, sctp_nets); 76 77 struct sctp_stream_reset_list { 78 TAILQ_ENTRY(sctp_stream_reset_list) next_resp; 79 uint32_t seq; 80 uint32_t tsn; 81 uint32_t number_entries; 82 uint16_t list_of_streams[]; 83 }; 84 85 TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list); 86 87 /* 88 * Users of the iterator need to malloc a iterator with a call to 89 * sctp_initiate_iterator(inp_func, assoc_func, inp_func, pcb_flags, pcb_features, 90 * asoc_state, void-ptr-arg, uint32-arg, end_func, inp); 91 * 92 * Use the following two defines if you don't care what pcb flags are on the EP 93 * and/or you don't care what state the association is in. 94 * 95 * Note that if you specify an INP as the last argument then ONLY each 96 * association of that single INP will be executed upon. Note that the pcb 97 * flags STILL apply so if the inp you specify has different pcb_flags then 98 * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to 99 * assure the inp you specify gets treated. 100 */ 101 #define SCTP_PCB_ANY_FLAGS 0x00000000 102 #define SCTP_PCB_ANY_FEATURES 0x00000000 103 #define SCTP_ASOC_ANY_STATE 0x00000000 104 105 typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr, 106 uint32_t val); 107 typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val); 108 typedef void (*end_func) (void *ptr, uint32_t val); 109 110 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 111 /* whats on the mcore control struct */ 112 struct sctp_mcore_queue { 113 TAILQ_ENTRY(sctp_mcore_queue) next; 114 struct vnet *vn; 115 struct mbuf *m; 116 int off; 117 int v6; 118 }; 119 120 TAILQ_HEAD(sctp_mcore_qhead, sctp_mcore_queue); 121 122 struct sctp_mcore_ctrl { 123 SCTP_PROCESS_STRUCT thread_proc; 124 struct sctp_mcore_qhead que; 125 struct mtx core_mtx; 126 struct mtx que_mtx; 127 int running; 128 int cpuid; 129 }; 130 131 132 #endif 133 134 135 struct sctp_iterator { 136 TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr; 137 struct vnet *vn; 138 struct sctp_timer tmr; 139 struct sctp_inpcb *inp; /* current endpoint */ 140 struct sctp_tcb *stcb; /* current* assoc */ 141 struct sctp_inpcb *next_inp; /* special hook to skip to */ 142 asoc_func function_assoc; /* per assoc function */ 143 inp_func function_inp; /* per endpoint function */ 144 inp_func function_inp_end; /* end INP function */ 145 end_func function_atend;/* iterator completion function */ 146 void *pointer; /* pointer for apply func to use */ 147 uint32_t val; /* value for apply func to use */ 148 uint32_t pcb_flags; /* endpoint flags being checked */ 149 uint32_t pcb_features; /* endpoint features being checked */ 150 uint32_t asoc_state; /* assoc state being checked */ 151 uint32_t iterator_flags; 152 uint8_t no_chunk_output; 153 uint8_t done_current_ep; 154 }; 155 156 /* iterator_flags values */ 157 #define SCTP_ITERATOR_DO_ALL_INP 0x00000001 158 #define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002 159 160 161 TAILQ_HEAD(sctpiterators, sctp_iterator); 162 163 struct sctp_copy_all { 164 struct sctp_inpcb *inp; /* ep */ 165 struct mbuf *m; 166 struct sctp_sndrcvinfo sndrcv; 167 int sndlen; 168 int cnt_sent; 169 int cnt_failed; 170 }; 171 172 struct sctp_asconf_iterator { 173 struct sctpladdr list_of_work; 174 int cnt; 175 }; 176 177 struct iterator_control { 178 struct mtx ipi_iterator_wq_mtx; 179 struct mtx it_mtx; 180 SCTP_PROCESS_STRUCT thread_proc; 181 struct sctpiterators iteratorhead; 182 struct sctp_iterator *cur_it; 183 uint32_t iterator_running; 184 uint32_t iterator_flags; 185 }; 186 187 #define SCTP_ITERATOR_STOP_CUR_IT 0x00000004 188 #define SCTP_ITERATOR_STOP_CUR_INP 0x00000008 189 190 struct sctp_net_route { 191 sctp_rtentry_t *ro_rt; 192 struct llentry *ro_lle; 193 char *ro_prepend; 194 uint16_t ro_plen; 195 uint16_t ro_flags; 196 uint16_t ro_mtu; 197 uint16_t spare; 198 union sctp_sockstore _l_addr; /* remote peer addr */ 199 struct sctp_ifa *_s_addr; /* our selected src addr */ 200 }; 201 202 struct htcp { 203 uint16_t alpha; /* Fixed point arith, << 7 */ 204 uint8_t beta; /* Fixed point arith, << 7 */ 205 uint8_t modeswitch; /* Delay modeswitch until we had at least one 206 * congestion event */ 207 uint32_t last_cong; /* Time since last congestion event end */ 208 uint32_t undo_last_cong; 209 uint16_t bytes_acked; 210 uint32_t bytecount; 211 uint32_t minRTT; 212 uint32_t maxRTT; 213 214 uint32_t undo_maxRTT; 215 uint32_t undo_old_maxB; 216 217 /* Bandwidth estimation */ 218 uint32_t minB; 219 uint32_t maxB; 220 uint32_t old_maxB; 221 uint32_t Bi; 222 uint32_t lasttime; 223 }; 224 225 struct rtcc_cc { 226 struct timeval tls; /* The time we started the sending */ 227 uint64_t lbw; /* Our last estimated bw */ 228 uint64_t lbw_rtt; /* RTT at bw estimate */ 229 uint64_t bw_bytes; /* The total bytes since this sending began */ 230 uint64_t bw_tot_time; /* The total time since sending began */ 231 uint64_t new_tot_time; /* temp holding the new value */ 232 uint64_t bw_bytes_at_last_rttc; /* What bw_bytes was at last rtt calc */ 233 uint32_t cwnd_at_bw_set;/* Cwnd at last bw saved - lbw */ 234 uint32_t vol_reduce; /* cnt of voluntary reductions */ 235 uint16_t steady_step; /* The number required to be in steady state */ 236 uint16_t step_cnt; /* The current number */ 237 uint8_t ret_from_eq; /* When all things are equal what do I return 238 * 0/1 - 1 no cc advance */ 239 uint8_t use_dccc_ecn; /* Flag to enable DCCC ECN */ 240 uint8_t tls_needs_set; /* Flag to indicate we need to set tls 0 or 1 241 * means set at send 2 not */ 242 uint8_t last_step_state;/* Last state if steady state stepdown is on */ 243 uint8_t rtt_set_this_sack; /* Flag saying this sack had RTT calc 244 * on it */ 245 uint8_t last_inst_ind; /* Last saved inst indication */ 246 }; 247 248 249 struct sctp_nets { 250 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */ 251 252 /* 253 * Things on the top half may be able to be split into a common 254 * structure shared by all. 255 */ 256 struct sctp_timer pmtu_timer; 257 struct sctp_timer hb_timer; 258 259 /* 260 * The following two in combination equate to a route entry for v6 261 * or v4. 262 */ 263 struct sctp_net_route ro; 264 265 /* mtu discovered so far */ 266 uint32_t mtu; 267 uint32_t ssthresh; /* not sure about this one for split */ 268 uint32_t last_cwr_tsn; 269 uint32_t cwr_window_tsn; 270 uint32_t ecn_ce_pkt_cnt; 271 uint32_t lost_cnt; 272 /* smoothed average things for RTT and RTO itself */ 273 int lastsa; 274 int lastsv; 275 uint64_t rtt; /* last measured rtt value in us */ 276 unsigned int RTO; 277 278 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */ 279 struct sctp_timer rxt_timer; 280 281 /* last time in seconds I sent to it */ 282 struct timeval last_sent_time; 283 union cc_control_data { 284 struct htcp htcp_ca; /* JRS - struct used in HTCP algorithm */ 285 struct rtcc_cc rtcc; /* rtcc module cc stuff */ 286 } cc_mod; 287 int ref_count; 288 289 /* Congestion stats per destination */ 290 /* 291 * flight size variables and such, sorry Vern, I could not avoid 292 * this if I wanted performance :> 293 */ 294 uint32_t flight_size; 295 uint32_t cwnd; /* actual cwnd */ 296 uint32_t prev_cwnd; /* cwnd before any processing */ 297 uint32_t ecn_prev_cwnd; /* ECN prev cwnd at first ecn_echo seen in new 298 * window */ 299 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */ 300 /* tracking variables to avoid the aloc/free in sack processing */ 301 unsigned int net_ack; 302 unsigned int net_ack2; 303 304 /* 305 * JRS - 5/8/07 - Variable to track last time a destination was 306 * active for CMT PF 307 */ 308 uint32_t last_active; 309 310 /* 311 * CMT variables (iyengar@cis.udel.edu) 312 */ 313 uint32_t this_sack_highest_newack; /* tracks highest TSN newly 314 * acked for a given dest in 315 * the current SACK. Used in 316 * SFR and HTNA algos */ 317 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected 318 * pseudo-cumack for this destination */ 319 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next 320 * expected pseudo-cumack for this 321 * destination */ 322 323 /* CMT fast recovery variables */ 324 uint32_t fast_recovery_tsn; 325 uint32_t heartbeat_random1; 326 uint32_t heartbeat_random2; 327 #ifdef INET6 328 uint32_t flowlabel; 329 #endif 330 uint8_t dscp; 331 332 struct timeval start_time; /* time when this net was created */ 333 uint32_t marked_retrans;/* number or DATA chunks marked for timer 334 * based retransmissions */ 335 uint32_t marked_fastretrans; 336 uint32_t heart_beat_delay; /* Heart Beat delay in ms */ 337 338 /* if this guy is ok or not ... status */ 339 uint16_t dest_state; 340 /* number of timeouts to consider the destination unreachable */ 341 uint16_t failure_threshold; 342 /* number of timeouts to consider the destination potentially failed */ 343 uint16_t pf_threshold; 344 /* error stats on the destination */ 345 uint16_t error_count; 346 /* UDP port number in case of UDP tunneling */ 347 uint16_t port; 348 349 uint8_t fast_retran_loss_recovery; 350 uint8_t will_exit_fast_recovery; 351 /* Flags that probably can be combined into dest_state */ 352 uint8_t fast_retran_ip; /* fast retransmit in progress */ 353 uint8_t hb_responded; 354 uint8_t saw_newack; /* CMT's SFR algorithm flag */ 355 uint8_t src_addr_selected; /* if we split we move */ 356 uint8_t indx_of_eligible_next_to_use; 357 uint8_t addr_is_local; /* its a local address (if known) could move 358 * in split */ 359 360 /* 361 * CMT variables (iyengar@cis.udel.edu) 362 */ 363 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to 364 * find a new pseudocumack. This flag 365 * is set after a new pseudo-cumack 366 * has been received and indicates 367 * that the sender should find the 368 * next pseudo-cumack expected for 369 * this destination */ 370 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to 371 * find a new rtx-pseudocumack. This 372 * flag is set after a new 373 * rtx-pseudo-cumack has been received 374 * and indicates that the sender 375 * should find the next 376 * rtx-pseudo-cumack expected for this 377 * destination */ 378 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to 379 * indicate if a new pseudo-cumack or 380 * rtx-pseudo-cumack has been received */ 381 uint8_t window_probe; /* Doing a window probe? */ 382 uint8_t RTO_measured; /* Have we done the first measure */ 383 uint8_t last_hs_used; /* index into the last HS table entry we used */ 384 uint8_t lan_type; 385 uint8_t rto_needed; 386 uint32_t flowid; 387 uint8_t flowtype; 388 }; 389 390 391 struct sctp_data_chunkrec { 392 uint32_t TSN_seq; /* the TSN of this transmit */ 393 uint32_t stream_seq; /* the stream sequence number of this transmit */ 394 uint16_t stream_number; /* the stream number of this guy */ 395 uint32_t payloadtype; 396 uint32_t context; /* from send */ 397 uint32_t cwnd_at_send; 398 /* 399 * part of the Highest sacked algorithm to be able to stroke counts 400 * on ones that are FR'd. 401 */ 402 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 403 struct timeval timetodrop; /* time we drop it from queue */ 404 uint32_t fsn_num; /* Fragment Sequence Number */ 405 uint8_t doing_fast_retransmit; 406 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 407 * outbound holds sending flags for PR-SCTP. */ 408 uint8_t state_flags; 409 uint8_t chunk_was_revoked; 410 uint8_t fwd_tsn_cnt; 411 }; 412 413 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 414 415 /* The lower byte is used to enumerate PR_SCTP policies */ 416 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 417 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 418 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 419 420 /* The upper byte is used as a bit mask */ 421 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100 422 423 struct chk_id { 424 uint8_t id; 425 uint8_t can_take_data; 426 }; 427 428 429 struct sctp_tmit_chunk { 430 union { 431 struct sctp_data_chunkrec data; 432 struct chk_id chunk_id; 433 } rec; 434 struct sctp_association *asoc; /* bp to asoc this belongs to */ 435 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 436 struct mbuf *data; /* pointer to mbuf chain of data */ 437 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 438 struct sctp_nets *whoTo; 439 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 440 int32_t sent; /* the send status */ 441 uint16_t snd_count; /* number of times I sent */ 442 uint16_t flags; /* flags, such as FRAGMENT_OK */ 443 uint16_t send_size; 444 uint16_t book_size; 445 uint16_t mbcnt; 446 uint16_t auth_keyid; 447 uint8_t holds_key_ref; /* flag if auth keyid refcount is held */ 448 uint8_t pad_inplace; 449 uint8_t do_rtt; 450 uint8_t book_size_scale; 451 uint8_t no_fr_allowed; 452 uint8_t copy_by_ref; 453 uint8_t window_probe; 454 }; 455 456 struct sctp_queued_to_read { /* sinfo structure Pluse more */ 457 uint16_t sinfo_stream; /* off the wire */ 458 uint32_t sinfo_ssn; /* off the wire */ 459 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for 460 * EOR */ 461 uint32_t sinfo_ppid; /* off the wire */ 462 uint32_t sinfo_context; /* pick this up from assoc def context? */ 463 uint32_t sinfo_timetolive; /* not used by kernel */ 464 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */ 465 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */ 466 sctp_assoc_t sinfo_assoc_id; /* our assoc id */ 467 /* Non sinfo stuff */ 468 uint32_t msg_id; /* Fragment Index */ 469 uint32_t length; /* length of data */ 470 uint32_t held_length; /* length held in sb */ 471 uint32_t top_fsn; /* Highest FSN in queue */ 472 uint32_t fsn_included; /* Highest FSN in *data portion */ 473 struct sctp_nets *whoFrom; /* where it came from */ 474 struct mbuf *data; /* front of the mbuf chain of data with 475 * PKT_HDR */ 476 struct mbuf *tail_mbuf; /* used for multi-part data */ 477 struct mbuf *aux_data; /* used to hold/cache control if o/s does not 478 * take it from us */ 479 struct sctp_tcb *stcb; /* assoc, used for window update */ 480 TAILQ_ENTRY(sctp_queued_to_read) next; 481 TAILQ_ENTRY(sctp_queued_to_read) next_instrm; 482 struct sctpchunk_listhead reasm; 483 uint16_t port_from; 484 uint16_t spec_flags; /* Flags to hold the notification field */ 485 uint8_t do_not_ref_stcb; 486 uint8_t end_added; 487 uint8_t pdapi_aborted; 488 uint8_t pdapi_started; 489 uint8_t some_taken; 490 uint8_t last_frag_seen; 491 uint8_t first_frag_seen; 492 uint8_t on_read_q; 493 uint8_t on_strm_q; 494 }; 495 496 #define SCTP_ON_ORDERED 1 497 #define SCTP_ON_UNORDERED 2 498 499 /* This data structure will be on the outbound 500 * stream queues. Data will be pulled off from 501 * the front of the mbuf data and chunk-ified 502 * by the output routines. We will custom 503 * fit every chunk we pull to the send/sent 504 * queue to make up the next full packet 505 * if we can. An entry cannot be removed 506 * from the stream_out queue until 507 * the msg_is_complete flag is set. This 508 * means at times data/tail_mbuf MIGHT 509 * be NULL.. If that occurs it happens 510 * for one of two reasons. Either the user 511 * is blocked on a send() call and has not 512 * awoken to copy more data down... OR 513 * the user is in the explict MSG_EOR mode 514 * and wrote some data, but has not completed 515 * sending. 516 */ 517 struct sctp_stream_queue_pending { 518 struct mbuf *data; 519 struct mbuf *tail_mbuf; 520 struct timeval ts; 521 struct sctp_nets *net; 522 TAILQ_ENTRY(sctp_stream_queue_pending) next; 523 TAILQ_ENTRY(sctp_stream_queue_pending) ss_next; 524 uint32_t fsn; 525 uint32_t length; 526 uint32_t timetolive; 527 uint32_t ppid; 528 uint32_t context; 529 uint16_t sinfo_flags; 530 uint16_t stream; 531 uint16_t act_flags; 532 uint16_t auth_keyid; 533 uint8_t holds_key_ref; 534 uint8_t msg_is_complete; 535 uint8_t some_taken; 536 uint8_t sender_all_done; 537 uint8_t put_last_out; 538 uint8_t discard_rest; 539 }; 540 541 /* 542 * this struct contains info that is used to track inbound stream data and 543 * help with ordering. 544 */ 545 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 546 struct sctp_stream_in { 547 struct sctp_readhead inqueue; 548 struct sctp_readhead uno_inqueue; 549 uint32_t last_sequence_delivered; /* used for re-order */ 550 uint16_t stream_no; 551 uint8_t delivery_started; 552 uint8_t pd_api_started; 553 }; 554 555 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 556 TAILQ_HEAD(sctplist_listhead, sctp_stream_queue_pending); 557 558 /* Round-robin schedulers */ 559 struct ss_rr { 560 /* next link in wheel */ 561 TAILQ_ENTRY(sctp_stream_out) next_spoke; 562 }; 563 564 /* Priority scheduler */ 565 struct ss_prio { 566 /* next link in wheel */ 567 TAILQ_ENTRY(sctp_stream_out) next_spoke; 568 /* priority id */ 569 uint16_t priority; 570 }; 571 572 /* Fair Bandwidth scheduler */ 573 struct ss_fb { 574 /* next link in wheel */ 575 TAILQ_ENTRY(sctp_stream_out) next_spoke; 576 /* stores message size */ 577 int32_t rounds; 578 }; 579 580 /* 581 * This union holds all data necessary for 582 * different stream schedulers. 583 */ 584 union scheduling_data { 585 struct sctpwheel_listhead out_wheel; 586 struct sctplist_listhead out_list; 587 }; 588 589 /* 590 * This union holds all parameters per stream 591 * necessary for different stream schedulers. 592 */ 593 union scheduling_parameters { 594 struct ss_rr rr; 595 struct ss_prio prio; 596 struct ss_fb fb; 597 }; 598 599 /* States for outgoing streams */ 600 #define SCTP_STREAM_CLOSED 0x00 601 #define SCTP_STREAM_OPENING 0x01 602 #define SCTP_STREAM_OPEN 0x02 603 #define SCTP_STREAM_RESET_PENDING 0x03 604 #define SCTP_STREAM_RESET_IN_FLIGHT 0x04 605 606 #define SCTP_MAX_STREAMS_AT_ONCE_RESET 200 607 608 /* This struct is used to track the traffic on outbound streams */ 609 struct sctp_stream_out { 610 struct sctp_streamhead outqueue; 611 union scheduling_parameters ss_params; 612 uint32_t chunks_on_queues; /* send queue and sent queue */ 613 #if defined(SCTP_DETAILED_STR_STATS) 614 uint32_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 615 uint32_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 616 #else 617 /* Only the aggregation */ 618 uint32_t abandoned_unsent[1]; 619 uint32_t abandoned_sent[1]; 620 #endif 621 /* 622 * For associations using DATA chunks, the lower 16-bit of 623 * next_mid_ordered are used as the next SSN. 624 */ 625 uint32_t next_mid_ordered; 626 uint32_t next_mid_unordered; 627 uint16_t stream_no; 628 uint8_t last_msg_incomplete; 629 uint8_t state; 630 }; 631 632 /* used to keep track of the addresses yet to try to add/delete */ 633 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 634 struct sctp_asconf_addr { 635 TAILQ_ENTRY(sctp_asconf_addr) next; 636 struct sctp_asconf_addr_param ap; 637 struct sctp_ifa *ifa; /* save the ifa for add/del ip */ 638 uint8_t sent; /* has this been sent yet? */ 639 uint8_t special_del; /* not to be used in lookup */ 640 }; 641 642 struct sctp_scoping { 643 uint8_t ipv4_addr_legal; 644 uint8_t ipv6_addr_legal; 645 uint8_t loopback_scope; 646 uint8_t ipv4_local_scope; 647 uint8_t local_scope; 648 uint8_t site_scope; 649 }; 650 651 #define SCTP_TSN_LOG_SIZE 40 652 653 struct sctp_tsn_log { 654 void *stcb; 655 uint32_t tsn; 656 uint32_t seq; 657 uint16_t strm; 658 uint16_t sz; 659 uint16_t flgs; 660 uint16_t in_pos; 661 uint16_t in_out; 662 uint16_t resv; 663 }; 664 665 #define SCTP_FS_SPEC_LOG_SIZE 200 666 struct sctp_fs_spec_log { 667 uint32_t sent; 668 uint32_t total_flight; 669 uint32_t tsn; 670 uint16_t book; 671 uint8_t incr; 672 uint8_t decr; 673 }; 674 675 /* This struct is here to cut out the compatiabilty 676 * pad that bulks up both the inp and stcb. The non 677 * pad portion MUST stay in complete sync with 678 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added 679 * this must be done here too. 680 */ 681 struct sctp_nonpad_sndrcvinfo { 682 uint16_t sinfo_stream; 683 uint16_t sinfo_ssn; 684 uint16_t sinfo_flags; 685 uint32_t sinfo_ppid; 686 uint32_t sinfo_context; 687 uint32_t sinfo_timetolive; 688 uint32_t sinfo_tsn; 689 uint32_t sinfo_cumtsn; 690 sctp_assoc_t sinfo_assoc_id; 691 uint16_t sinfo_keynumber; 692 uint16_t sinfo_keynumber_valid; 693 }; 694 695 /* 696 * JRS - Structure to hold function pointers to the functions responsible 697 * for congestion control. 698 */ 699 700 struct sctp_cc_functions { 701 void (*sctp_set_initial_cc_param) (struct sctp_tcb *stcb, struct sctp_nets *net); 702 void (*sctp_cwnd_update_after_sack) (struct sctp_tcb *stcb, 703 struct sctp_association *asoc, 704 int accum_moved, int reneged_all, int will_exit); 705 void (*sctp_cwnd_update_exit_pf) (struct sctp_tcb *stcb, struct sctp_nets *net); 706 void (*sctp_cwnd_update_after_fr) (struct sctp_tcb *stcb, 707 struct sctp_association *asoc); 708 void (*sctp_cwnd_update_after_timeout) (struct sctp_tcb *stcb, 709 struct sctp_nets *net); 710 void (*sctp_cwnd_update_after_ecn_echo) (struct sctp_tcb *stcb, 711 struct sctp_nets *net, int in_window, int num_pkt_lost); 712 void (*sctp_cwnd_update_after_packet_dropped) (struct sctp_tcb *stcb, 713 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp, 714 uint32_t * bottle_bw, uint32_t * on_queue); 715 void (*sctp_cwnd_update_after_output) (struct sctp_tcb *stcb, 716 struct sctp_nets *net, int burst_limit); 717 void (*sctp_cwnd_update_packet_transmitted) (struct sctp_tcb *stcb, 718 struct sctp_nets *net); 719 void (*sctp_cwnd_update_tsn_acknowledged) (struct sctp_nets *net, 720 struct sctp_tmit_chunk *); 721 void (*sctp_cwnd_new_transmission_begins) (struct sctp_tcb *stcb, 722 struct sctp_nets *net); 723 void (*sctp_cwnd_prepare_net_for_sack) (struct sctp_tcb *stcb, 724 struct sctp_nets *net); 725 int (*sctp_cwnd_socket_option) (struct sctp_tcb *stcb, int set, struct sctp_cc_option *); 726 void (*sctp_rtt_calculated) (struct sctp_tcb *, struct sctp_nets *, struct timeval *); 727 }; 728 729 /* 730 * RS - Structure to hold function pointers to the functions responsible 731 * for stream scheduling. 732 */ 733 struct sctp_ss_functions { 734 void (*sctp_ss_init) (struct sctp_tcb *stcb, struct sctp_association *asoc, 735 int holds_lock); 736 void (*sctp_ss_clear) (struct sctp_tcb *stcb, struct sctp_association *asoc, 737 int clear_values, int holds_lock); 738 void (*sctp_ss_init_stream) (struct sctp_stream_out *strq, struct sctp_stream_out *with_strq); 739 void (*sctp_ss_add_to_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 740 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 741 int (*sctp_ss_is_empty) (struct sctp_tcb *stcb, struct sctp_association *asoc); 742 void (*sctp_ss_remove_from_stream) (struct sctp_tcb *stcb, struct sctp_association *asoc, 743 struct sctp_stream_out *strq, struct sctp_stream_queue_pending *sp, int holds_lock); 744 struct sctp_stream_out *(*sctp_ss_select_stream) (struct sctp_tcb *stcb, 745 struct sctp_nets *net, struct sctp_association *asoc); 746 void (*sctp_ss_scheduled) (struct sctp_tcb *stcb, struct sctp_nets *net, 747 struct sctp_association *asoc, struct sctp_stream_out *strq, int moved_how_much); 748 void (*sctp_ss_packet_done) (struct sctp_tcb *stcb, struct sctp_nets *net, 749 struct sctp_association *asoc); 750 int (*sctp_ss_get_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 751 struct sctp_stream_out *strq, uint16_t * value); 752 int (*sctp_ss_set_value) (struct sctp_tcb *stcb, struct sctp_association *asoc, 753 struct sctp_stream_out *strq, uint16_t value); 754 }; 755 756 /* used to save ASCONF chunks for retransmission */ 757 TAILQ_HEAD(sctp_asconf_head, sctp_asconf); 758 struct sctp_asconf { 759 TAILQ_ENTRY(sctp_asconf) next; 760 uint32_t serial_number; 761 uint16_t snd_count; 762 struct mbuf *data; 763 uint16_t len; 764 }; 765 766 /* used to save ASCONF-ACK chunks for retransmission */ 767 TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack); 768 struct sctp_asconf_ack { 769 TAILQ_ENTRY(sctp_asconf_ack) next; 770 uint32_t serial_number; 771 struct sctp_nets *last_sent_to; 772 struct mbuf *data; 773 uint16_t len; 774 }; 775 776 /* 777 * Here we have information about each individual association that we track. 778 * We probably in production would be more dynamic. But for ease of 779 * implementation we will have a fixed array that we hunt for in a linear 780 * fashion. 781 */ 782 struct sctp_association { 783 /* association state */ 784 int state; 785 786 /* queue of pending addrs to add/delete */ 787 struct sctp_asconf_addrhead asconf_queue; 788 789 struct timeval time_entered; /* time we entered state */ 790 struct timeval time_last_rcvd; 791 struct timeval time_last_sent; 792 struct timeval time_last_sat_advance; 793 struct sctp_nonpad_sndrcvinfo def_send; 794 795 /* timers and such */ 796 struct sctp_timer dack_timer; /* Delayed ack timer */ 797 struct sctp_timer asconf_timer; /* asconf */ 798 struct sctp_timer strreset_timer; /* stream reset */ 799 struct sctp_timer shut_guard_timer; /* shutdown guard */ 800 struct sctp_timer autoclose_timer; /* automatic close timer */ 801 struct sctp_timer delayed_event_timer; /* timer for delayed events */ 802 struct sctp_timer delete_prim_timer; /* deleting primary dst */ 803 804 /* list of restricted local addresses */ 805 struct sctpladdr sctp_restricted_addrs; 806 807 /* last local address pending deletion (waiting for an address add) */ 808 struct sctp_ifa *asconf_addr_del_pending; 809 /* Deleted primary destination (used to stop timer) */ 810 struct sctp_nets *deleted_primary; 811 812 struct sctpnetlisthead nets; /* remote address list */ 813 814 /* Free chunk list */ 815 struct sctpchunk_listhead free_chunks; 816 817 /* Control chunk queue */ 818 struct sctpchunk_listhead control_send_queue; 819 820 /* ASCONF chunk queue */ 821 struct sctpchunk_listhead asconf_send_queue; 822 823 /* 824 * Once a TSN hits the wire it is moved to the sent_queue. We 825 * maintain two counts here (don't know if any but retran_cnt is 826 * needed). The idea is that the sent_queue_retran_cnt reflects how 827 * many chunks have been marked for retranmission by either T3-rxt 828 * or FR. 829 */ 830 struct sctpchunk_listhead sent_queue; 831 struct sctpchunk_listhead send_queue; 832 833 /* Scheduling queues */ 834 union scheduling_data ss_data; 835 836 /* 837 * This pointer will be set to NULL most of the time. But when we 838 * have a fragmented message, where we could not get out all of the 839 * message at the last send then this will point to the stream to go 840 * get data from. 841 */ 842 struct sctp_stream_out *locked_on_sending; 843 844 /* If an iterator is looking at me, this is it */ 845 struct sctp_iterator *stcb_starting_point_for_iterator; 846 847 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 848 struct sctp_asconf_ackhead asconf_ack_sent; 849 850 /* 851 * pointer to last stream reset queued to control queue by us with 852 * requests. 853 */ 854 struct sctp_tmit_chunk *str_reset; 855 /* 856 * if Source Address Selection happening, this will rotate through 857 * the link list. 858 */ 859 struct sctp_laddr *last_used_address; 860 861 /* stream arrays */ 862 struct sctp_stream_in *strmin; 863 struct sctp_stream_out *strmout; 864 uint8_t *mapping_array; 865 /* primary destination to use */ 866 struct sctp_nets *primary_destination; 867 struct sctp_nets *alternate; /* If primary is down or PF */ 868 /* For CMT */ 869 struct sctp_nets *last_net_cmt_send_started; 870 /* last place I got a data chunk from */ 871 struct sctp_nets *last_data_chunk_from; 872 /* last place I got a control from */ 873 struct sctp_nets *last_control_chunk_from; 874 875 /* circular looking for output selection */ 876 struct sctp_stream_out *last_out_stream; 877 878 /* 879 * wait to the point the cum-ack passes req->send_reset_at_tsn for 880 * any req on the list. 881 */ 882 struct sctp_resethead resetHead; 883 884 /* queue of chunks waiting to be sent into the local stack */ 885 struct sctp_readhead pending_reply_queue; 886 887 /* JRS - the congestion control functions are in this struct */ 888 struct sctp_cc_functions cc_functions; 889 /* 890 * JRS - value to store the currently loaded congestion control 891 * module 892 */ 893 uint32_t congestion_control_module; 894 /* RS - the stream scheduling functions are in this struct */ 895 struct sctp_ss_functions ss_functions; 896 /* RS - value to store the currently loaded stream scheduling module */ 897 uint32_t stream_scheduling_module; 898 899 uint32_t vrf_id; 900 uint32_t cookie_preserve_req; 901 /* ASCONF next seq I am sending out, inits at init-tsn */ 902 uint32_t asconf_seq_out; 903 uint32_t asconf_seq_out_acked; 904 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 905 uint32_t asconf_seq_in; 906 907 /* next seq I am sending in str reset messages */ 908 uint32_t str_reset_seq_out; 909 /* next seq I am expecting in str reset messages */ 910 uint32_t str_reset_seq_in; 911 912 /* various verification tag information */ 913 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 914 * by remote end, and I have unlocked this 915 * will be regenerated to a new random value. */ 916 uint32_t peer_vtag; /* The peers last tag */ 917 918 uint32_t my_vtag_nonce; 919 uint32_t peer_vtag_nonce; 920 921 uint32_t assoc_id; 922 923 /* This is the SCTP fragmentation threshold */ 924 uint32_t smallest_mtu; 925 926 /* 927 * Special hook for Fast retransmit, allows us to track the highest 928 * TSN that is NEW in this SACK if gap ack blocks are present. 929 */ 930 uint32_t this_sack_highest_gap; 931 932 /* 933 * The highest consecutive TSN that has been acked by peer on my 934 * sends 935 */ 936 uint32_t last_acked_seq; 937 938 /* The next TSN that I will use in sending. */ 939 uint32_t sending_seq; 940 941 /* Original seq number I used ??questionable to keep?? */ 942 uint32_t init_seq_number; 943 944 945 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 946 /* (A1 in Section 4.2) */ 947 uint32_t advanced_peer_ack_point; 948 949 /* 950 * The highest consequetive TSN at the bottom of the mapping array 951 * (for his sends). 952 */ 953 uint32_t cumulative_tsn; 954 /* 955 * Used to track the mapping array and its offset bits. This MAY be 956 * lower then cumulative_tsn. 957 */ 958 uint32_t mapping_array_base_tsn; 959 /* 960 * used to track highest TSN we have received and is listed in the 961 * mapping array. 962 */ 963 uint32_t highest_tsn_inside_map; 964 965 /* EY - new NR variables used for nr_sack based on mapping_array */ 966 uint8_t *nr_mapping_array; 967 uint32_t highest_tsn_inside_nr_map; 968 969 uint32_t fast_recovery_tsn; 970 uint32_t sat_t3_recovery_tsn; 971 uint32_t tsn_last_delivered; 972 /* 973 * For the pd-api we should re-write this a bit more efficient. We 974 * could have multiple sctp_queued_to_read's that we are building at 975 * once. Now we only do this when we get ready to deliver to the 976 * socket buffer. Note that we depend on the fact that the struct is 977 * "stuck" on the read queue until we finish all the pd-api. 978 */ 979 struct sctp_queued_to_read *control_pdapi; 980 981 uint32_t tsn_of_pdapi_last_delivered; 982 uint32_t pdapi_ppid; 983 uint32_t context; 984 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 985 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 986 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 987 #ifdef SCTP_ASOCLOG_OF_TSNS 988 /* 989 * special log - This adds considerable size to the asoc, but 990 * provides a log that you can use to detect problems via kgdb. 991 */ 992 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE]; 993 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE]; 994 uint32_t cumack_log[SCTP_TSN_LOG_SIZE]; 995 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE]; 996 uint16_t tsn_in_at; 997 uint16_t tsn_out_at; 998 uint16_t tsn_in_wrapped; 999 uint16_t tsn_out_wrapped; 1000 uint16_t cumack_log_at; 1001 uint16_t cumack_log_atsnt; 1002 #endif /* SCTP_ASOCLOG_OF_TSNS */ 1003 #ifdef SCTP_FS_SPEC_LOG 1004 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE]; 1005 uint16_t fs_index; 1006 #endif 1007 1008 /* 1009 * window state information and smallest MTU that I use to bound 1010 * segmentation 1011 */ 1012 uint32_t peers_rwnd; 1013 uint32_t my_rwnd; 1014 uint32_t my_last_reported_rwnd; 1015 uint32_t sctp_frag_point; 1016 1017 uint32_t total_output_queue_size; 1018 1019 uint32_t sb_cc; /* shadow of sb_cc */ 1020 uint32_t sb_send_resv; /* amount reserved on a send */ 1021 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd 1022 * control */ 1023 #ifdef INET6 1024 uint32_t default_flowlabel; 1025 #endif 1026 uint32_t pr_sctp_cnt; 1027 int ctrl_queue_cnt; /* could be removed REM - NO IT CAN'T!! RRS */ 1028 /* 1029 * All outbound datagrams queue into this list from the individual 1030 * stream queue. Here they get assigned a TSN and then await 1031 * sending. The stream seq comes when it is first put in the 1032 * individual str queue 1033 */ 1034 unsigned int stream_queue_cnt; 1035 unsigned int send_queue_cnt; 1036 unsigned int sent_queue_cnt; 1037 unsigned int sent_queue_cnt_removeable; 1038 /* 1039 * Number on sent queue that are marked for retran until this value 1040 * is 0 we only send one packet of retran'ed data. 1041 */ 1042 unsigned int sent_queue_retran_cnt; 1043 1044 unsigned int size_on_reasm_queue; 1045 unsigned int cnt_on_reasm_queue; 1046 unsigned int fwd_tsn_cnt; 1047 /* amount of data (bytes) currently in flight (on all destinations) */ 1048 unsigned int total_flight; 1049 /* Total book size in flight */ 1050 unsigned int total_flight_count; /* count of chunks used with 1051 * book total */ 1052 /* count of destinaton nets and list of destination nets */ 1053 unsigned int numnets; 1054 1055 /* Total error count on this association */ 1056 unsigned int overall_error_count; 1057 1058 unsigned int cnt_msg_on_sb; 1059 1060 /* All stream count of chunks for delivery */ 1061 unsigned int size_on_all_streams; 1062 unsigned int cnt_on_all_streams; 1063 1064 /* Heart Beat delay in ms */ 1065 uint32_t heart_beat_delay; 1066 1067 /* autoclose */ 1068 unsigned int sctp_autoclose_ticks; 1069 1070 /* how many preopen streams we have */ 1071 unsigned int pre_open_streams; 1072 1073 /* How many streams I support coming into me */ 1074 unsigned int max_inbound_streams; 1075 1076 /* the cookie life I award for any cookie, in seconds */ 1077 unsigned int cookie_life; 1078 /* time to delay acks for */ 1079 unsigned int delayed_ack; 1080 unsigned int old_delayed_ack; 1081 unsigned int sack_freq; 1082 unsigned int data_pkts_seen; 1083 1084 unsigned int numduptsns; 1085 int dup_tsns[SCTP_MAX_DUP_TSNS]; 1086 unsigned int initial_init_rto_max; /* initial RTO for INIT's */ 1087 unsigned int initial_rto; /* initial send RTO */ 1088 unsigned int minrto; /* per assoc RTO-MIN */ 1089 unsigned int maxrto; /* per assoc RTO-MAX */ 1090 1091 /* authentication fields */ 1092 sctp_auth_chklist_t *local_auth_chunks; 1093 sctp_auth_chklist_t *peer_auth_chunks; 1094 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 1095 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 1096 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 1097 sctp_authinfo_t authinfo; /* randoms, cached keys */ 1098 /* 1099 * refcnt to block freeing when a sender or receiver is off coping 1100 * user data in. 1101 */ 1102 uint32_t refcnt; 1103 uint32_t chunks_on_out_queue; /* total chunks floating around, 1104 * locked by send socket buffer */ 1105 uint32_t peers_adaptation; 1106 uint16_t peer_hmac_id; /* peer HMAC id to send */ 1107 1108 /* 1109 * Being that we have no bag to collect stale cookies, and that we 1110 * really would not want to anyway.. we will count them in this 1111 * counter. We of course feed them to the pigeons right away (I have 1112 * always thought of pigeons as flying rats). 1113 */ 1114 uint16_t stale_cookie_count; 1115 1116 /* 1117 * For the partial delivery API, if up, invoked this is what last 1118 * TSN I delivered 1119 */ 1120 uint16_t str_of_pdapi; 1121 uint16_t ssn_of_pdapi; 1122 1123 /* counts of actual built streams. Allocation may be more however */ 1124 /* could re-arrange to optimize space here. */ 1125 uint16_t streamincnt; 1126 uint16_t streamoutcnt; 1127 uint16_t strm_realoutsize; 1128 uint16_t strm_pending_add_size; 1129 /* my maximum number of retrans of INIT and SEND */ 1130 /* copied from SCTP but should be individually setable */ 1131 uint16_t max_init_times; 1132 uint16_t max_send_times; 1133 1134 uint16_t def_net_failure; 1135 1136 uint16_t def_net_pf_threshold; 1137 1138 /* 1139 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 1140 * awaiting ACK 1141 */ 1142 uint16_t mapping_array_size; 1143 1144 uint16_t last_strm_seq_delivered; 1145 uint16_t last_strm_no_delivered; 1146 1147 uint16_t last_revoke_count; 1148 int16_t num_send_timers_up; 1149 1150 uint16_t stream_locked_on; 1151 uint16_t ecn_echo_cnt_onq; 1152 1153 uint16_t free_chunk_cnt; 1154 uint8_t stream_locked; 1155 uint8_t authenticated; /* packet authenticated ok */ 1156 /* 1157 * This flag indicates that a SACK need to be sent. Initially this 1158 * is 1 to send the first sACK immediately. 1159 */ 1160 uint8_t send_sack; 1161 1162 /* max burst of new packets into the network */ 1163 uint32_t max_burst; 1164 /* max burst of fast retransmit packets */ 1165 uint32_t fr_max_burst; 1166 1167 uint8_t sat_network; /* RTT is in range of sat net or greater */ 1168 uint8_t sat_network_lockout; /* lockout code */ 1169 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 1170 /* flag goes on when we are doing a partial delivery api */ 1171 uint8_t hb_random_values[4]; 1172 uint8_t fragmented_delivery_inprogress; 1173 uint8_t fragment_flags; 1174 uint8_t last_flags_delivered; 1175 uint8_t hb_ect_randombit; 1176 uint8_t hb_random_idx; 1177 uint8_t default_dscp; 1178 uint8_t asconf_del_pending; /* asconf delete last addr pending */ 1179 uint8_t trigger_reset; 1180 /* 1181 * This value, plus all other ack'd but above cum-ack is added 1182 * together to cross check against the bit that we have yet to 1183 * define (probably in the SACK). When the cum-ack is updated, this 1184 * sum is updated as well. 1185 */ 1186 1187 /* Flags whether an extension is supported or not */ 1188 uint8_t ecn_supported; 1189 uint8_t prsctp_supported; 1190 uint8_t auth_supported; 1191 uint8_t asconf_supported; 1192 uint8_t reconfig_supported; 1193 uint8_t nrsack_supported; 1194 uint8_t pktdrop_supported; 1195 uint8_t idata_supported; 1196 1197 /* Did the peer make the stream config (add out) request */ 1198 uint8_t peer_req_out; 1199 1200 uint8_t local_strreset_support; 1201 uint8_t peer_supports_nat; 1202 1203 struct sctp_scoping scope; 1204 /* flags to handle send alternate net tracking */ 1205 uint8_t used_alt_asconfack; 1206 uint8_t fast_retran_loss_recovery; 1207 uint8_t sat_t3_loss_recovery; 1208 uint8_t dropped_special_cnt; 1209 uint8_t seen_a_sack_this_pkt; 1210 uint8_t stream_reset_outstanding; 1211 uint8_t stream_reset_out_is_outstanding; 1212 uint8_t delayed_connection; 1213 uint8_t ifp_had_enobuf; 1214 uint8_t saw_sack_with_frags; 1215 uint8_t saw_sack_with_nr_frags; 1216 uint8_t in_asocid_hash; 1217 uint8_t assoc_up_sent; 1218 uint8_t adaptation_needed; 1219 uint8_t adaptation_sent; 1220 /* CMT variables */ 1221 uint8_t cmt_dac_pkts_rcvd; 1222 uint8_t sctp_cmt_on_off; 1223 uint8_t iam_blocking; 1224 uint8_t cookie_how[8]; 1225 /* JRS 5/21/07 - CMT PF variable */ 1226 uint8_t sctp_cmt_pf; 1227 uint8_t use_precise_time; 1228 uint64_t sctp_features; 1229 uint32_t max_cwnd; 1230 uint16_t port; /* remote UDP encapsulation port */ 1231 /* 1232 * The mapping array is used to track out of order sequences above 1233 * last_acked_seq. 0 indicates packet missing 1 indicates packet 1234 * rec'd. We slide it up every time we raise last_acked_seq and 0 1235 * trailing locactions out. If I get a TSN above the array 1236 * mappingArraySz, I discard the datagram and let retransmit happen. 1237 */ 1238 uint32_t marked_retrans; 1239 uint32_t timoinit; 1240 uint32_t timodata; 1241 uint32_t timosack; 1242 uint32_t timoshutdown; 1243 uint32_t timoheartbeat; 1244 uint32_t timocookie; 1245 uint32_t timoshutdownack; 1246 struct timeval start_time; 1247 struct timeval discontinuity_time; 1248 uint64_t abandoned_unsent[SCTP_PR_SCTP_MAX + 1]; 1249 uint64_t abandoned_sent[SCTP_PR_SCTP_MAX + 1]; 1250 }; 1251 1252 #endif 1253