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