1/*- 2 * Copyright (c) 2001-2006, Cisco Systems, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * a) Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * 10 * b) Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the distribution. 13 * 14 * c) Neither the name of Cisco Systems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31/* $KAME: sctp_structs.h,v 1.13 2005/03/06 16:04:18 itojun Exp $ */ 32 33#include <sys/cdefs.h>
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34__FBSDID("$FreeBSD: head/sys/netinet/sctp_structs.h 163953 2006-11-03 15:23:16Z rrs $");
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34__FBSDID("$FreeBSD: head/sys/netinet/sctp_structs.h 163996 2006-11-05 13:25:18Z rrs $"); |
35 36#ifndef __sctp_structs_h__ 37#define __sctp_structs_h__ 38 39#include <sys/queue.h> 40 41#include <sys/callout.h> 42#include <sys/socket.h> 43 44#ifdef IPSEC 45#include <netinet6/ipsec.h> 46#include <netkey/key.h> 47#endif 48 49#include <netinet/sctp_header.h> 50#include <netinet/sctp_uio.h> 51#include <netinet/sctp_auth.h> 52 53struct sctp_timer { 54 struct callout timer; 55 int type; 56 /* 57 * Depending on the timer type these will be setup and cast with the 58 * appropriate entity. 59 */ 60 void *ep; 61 void *tcb; 62 void *net; 63 64 /* for sanity checking */ 65 void *self; 66 uint32_t ticks; 67}; 68 69struct sctp_nonpad_sndrcvinfo { 70 uint16_t sinfo_stream; 71 uint16_t sinfo_ssn; 72 uint16_t sinfo_flags; 73 uint32_t sinfo_ppid; 74 uint32_t sinfo_context; 75 uint32_t sinfo_timetolive; 76 uint32_t sinfo_tsn; 77 uint32_t sinfo_cumtsn; 78 sctp_assoc_t sinfo_assoc_id; 79}; 80 81 82/* 83 * This is the information we track on each interface that we know about from 84 * the distant end. 85 */ 86TAILQ_HEAD(sctpnetlisthead, sctp_nets); 87 88struct sctp_stream_reset_list { 89 TAILQ_ENTRY(sctp_stream_reset_list) next_resp; 90 uint32_t tsn; 91 int number_entries; 92 struct sctp_stream_reset_out_request req; 93}; 94 95TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list); 96 97/* 98 * Users of the iterator need to malloc a iterator with a call to 99 * sctp_initiate_iterator(inp_func, assoc_func, pcb_flags, pcb_features, 100 * asoc_state, void-ptr-arg, uint32-arg, end_func, inp); 101 * 102 * Use the following two defines if you don't care what pcb flags are on the EP 103 * and/or you don't care what state the association is in. 104 * 105 * Note that if you specify an INP as the last argument then ONLY each 106 * association of that single INP will be executed upon. Note that the pcb 107 * flags STILL apply so if the inp you specify has different pcb_flags then 108 * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to 109 * assure the inp you specify gets treated. 110 */ 111#define SCTP_PCB_ANY_FLAGS 0x00000000 112#define SCTP_PCB_ANY_FEATURES 0x00000000 113#define SCTP_ASOC_ANY_STATE 0x00000000 114 115typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr, 116 uint32_t val); 117typedef void (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val); 118typedef void (*end_func) (void *ptr, uint32_t val); 119 120struct sctp_iterator { 121 LIST_ENTRY(sctp_iterator) sctp_nxt_itr; 122 struct sctp_timer tmr; 123 struct sctp_inpcb *inp; /* current endpoint */ 124 struct sctp_tcb *stcb; /* current* assoc */ 125 asoc_func function_assoc; /* per assoc function */ 126 inp_func function_inp; /* per endpoint function */ 127 end_func function_atend;/* iterator completion function */ 128 void *pointer; /* pointer for apply func to use */ 129 uint32_t val; /* value for apply func to use */ 130 uint32_t pcb_flags; /* endpoint flags being checked */ 131 uint32_t pcb_features; /* endpoint features being checked */ 132 uint32_t asoc_state; /* assoc state being checked */ 133 uint32_t iterator_flags; 134 uint8_t no_chunk_output; 135}; 136 137/* iterator_flags values */ 138#define SCTP_ITERATOR_DO_ALL_INP 0x00000001 139#define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002 140 141LIST_HEAD(sctpiterators, sctp_iterator); 142 143struct sctp_copy_all { 144 struct sctp_inpcb *inp; /* ep */ 145 struct mbuf *m; 146 struct sctp_sndrcvinfo sndrcv; 147 int sndlen; 148 int cnt_sent; 149 int cnt_failed; 150}; 151 152union sctp_sockstore { 153#ifdef AF_INET 154 struct sockaddr_in sin; 155#endif 156#ifdef AF_INET6 157 struct sockaddr_in6 sin6; 158#endif 159 struct sockaddr sa; 160}; 161 162struct sctp_nets { 163 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */ 164 165 /* 166 * Things on the top half may be able to be split into a common 167 * structure shared by all. 168 */ 169 struct sctp_timer pmtu_timer; 170 171 /* 172 * The following two in combination equate to a route entry for v6 173 * or v4. 174 */ 175 struct sctp_route { 176 struct rtentry *ro_rt; 177 union sctp_sockstore _l_addr; /* remote peer addr */ 178 union sctp_sockstore _s_addr; /* our selected src addr */ 179 } ro; 180 /* mtu discovered so far */ 181 uint32_t mtu; 182 uint32_t ssthresh; /* not sure about this one for split */ 183 184 /* smoothed average things for RTT and RTO itself */ 185 int lastsa; 186 int lastsv; 187 unsigned int RTO; 188 189 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */ 190 struct sctp_timer rxt_timer; 191 struct sctp_timer fr_timer; /* for early fr */ 192 193 /* last time in seconds I sent to it */ 194 struct timeval last_sent_time; 195 int ref_count; 196 197 /* Congestion stats per destination */ 198 /* 199 * flight size variables and such, sorry Vern, I could not avoid 200 * this if I wanted performance :> 201 */ 202 uint32_t flight_size; 203 uint32_t cwnd; /* actual cwnd */ 204 uint32_t prev_cwnd; /* cwnd before any processing */ 205 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */ 206 uint32_t rtt_variance; 207 uint32_t prev_rtt; 208 /* tracking variables to avoid the aloc/free in sack processing */ 209 unsigned int net_ack; 210 unsigned int net_ack2; 211 212 /* 213 * CMT variables (iyengar@cis.udel.edu) 214 */ 215 uint32_t this_sack_highest_newack; /* tracks highest TSN newly 216 * acked for a given dest in 217 * the current SACK. Used in 218 * SFR and HTNA algos */ 219 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected 220 * pseudo-cumack for this destination */ 221 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next 222 * expected pseudo-cumack for this 223 * destination */ 224 225 /* CMT fast recovery variables */ 226 uint32_t fast_recovery_tsn; 227 uint32_t heartbeat_random1; 228 uint32_t heartbeat_random2; 229 uint32_t tos_flowlabel; 230 231 /* if this guy is ok or not ... status */ 232 uint16_t dest_state; 233 /* number of transmit failures to down this guy */ 234 uint16_t failure_threshold; 235 /* error stats on destination */ 236 uint16_t error_count; 237 238 uint8_t fast_retran_loss_recovery; 239 uint8_t will_exit_fast_recovery; 240 /* Flags that probably can be combined into dest_state */ 241 uint8_t rto_variance_dir; /* increase = 1, decreasing = 0 */ 242 uint8_t rto_pending; /* is segment marked for RTO update ** if we 243 * split? */ 244 uint8_t fast_retran_ip; /* fast retransmit in progress */ 245 uint8_t hb_responded; 246 uint8_t saw_newack; /* CMT's SFR algorithm flag */ 247 uint8_t src_addr_selected; /* if we split we move */ 248 uint8_t indx_of_eligible_next_to_use; 249 uint8_t addr_is_local; /* its a local address (if known) could move 250 * in split */ 251 252 /* 253 * CMT variables (iyengar@cis.udel.edu) 254 */ 255 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to 256 * find a new pseudocumack. This flag 257 * is set after a new pseudo-cumack 258 * has been received and indicates 259 * that the sender should find the 260 * next pseudo-cumack expected for 261 * this destination */ 262 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to 263 * find a new rtx-pseudocumack. This 264 * flag is set after a new 265 * rtx-pseudo-cumack has been received 266 * and indicates that the sender 267 * should find the next 268 * rtx-pseudo-cumack expected for this 269 * destination */ 270 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to 271 * indicate if a new pseudo-cumack or 272 * rtx-pseudo-cumack has been received */ 273#ifdef SCTP_HIGH_SPEED 274 uint8_t last_hs_used; /* index into the last HS table entry we used */ 275#endif 276}; 277 278 279struct sctp_data_chunkrec { 280 uint32_t TSN_seq; /* the TSN of this transmit */ 281 uint16_t stream_seq; /* the stream sequence number of this transmit */ 282 uint16_t stream_number; /* the stream number of this guy */ 283 uint32_t payloadtype; 284 uint32_t context; /* from send */ 285 286 /* ECN Nonce: Nonce Value for this chunk */ 287 uint8_t ect_nonce; 288 289 /* 290 * part of the Highest sacked algorithm to be able to stroke counts 291 * on ones that are FR'd. 292 */ 293 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 294 struct timeval timetodrop; /* time we drop it from queue */ 295 uint8_t doing_fast_retransmit; 296 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 297 * outbound holds sending flags. */ 298 uint8_t state_flags; 299 uint8_t chunk_was_revoked; 300}; 301 302TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 303 304/* The lower byte is used to enumerate PR_SCTP policies */ 305#define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 306#define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 307#define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 308 309/* The upper byte is used a a bit mask */ 310#define CHUNK_FLAGS_FRAGMENT_OK 0x0100 311 312struct chk_id { 313 uint16_t id; 314 uint16_t can_take_data; 315}; 316 317 318struct sctp_tmit_chunk { 319 union { 320 struct sctp_data_chunkrec data; 321 struct chk_id chunk_id; 322 } rec; 323 struct sctp_association *asoc; /* bp to asoc this belongs to */ 324 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 325 struct mbuf *data; /* pointer to mbuf chain of data */ 326 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 327 struct sctp_nets *whoTo; 328 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 329 int32_t sent; /* the send status */ 330 uint16_t snd_count; /* number of times I sent */ 331 uint16_t flags; /* flags, such as FRAGMENT_OK */ 332 uint16_t send_size; 333 uint16_t book_size; 334 uint16_t mbcnt; 335 uint8_t pad_inplace; 336 uint8_t do_rtt; 337 uint8_t book_size_scale; 338 uint8_t addr_over; /* flag which is set if the dest address for 339 * this chunk is overridden by user. Used for 340 * CMT (iyengar@cis.udel.edu, 2005/06/21) */ 341 uint8_t no_fr_allowed; 342 uint8_t pr_sctp_on; 343 uint8_t copy_by_ref; 344}; 345 346/* 347 * The first part of this structure MUST be the entire sinfo structure. Maybe 348 * I should have made it a sub structure... we can circle back later and do 349 * that if we want. 350 */ 351struct sctp_queued_to_read { /* sinfo structure Pluse more */ 352 uint16_t sinfo_stream; /* off the wire */ 353 uint16_t sinfo_ssn; /* off the wire */ 354 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for 355 * EOR */ 356 uint32_t sinfo_ppid; /* off the wire */ 357 uint32_t sinfo_context; /* pick this up from assoc def context? */ 358 uint32_t sinfo_timetolive; /* not used by kernel */ 359 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */ 360 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */ 361 sctp_assoc_t sinfo_assoc_id; /* our assoc id */ 362 /* Non sinfo stuff */ 363 uint32_t length; /* length of data */ 364 uint32_t held_length; /* length held in sb */ 365 struct sctp_nets *whoFrom; /* where it came from */ 366 struct mbuf *data; /* front of the mbuf chain of data with 367 * PKT_HDR */ 368 struct mbuf *tail_mbuf; /* used for multi-part data */ 369 struct sctp_tcb *stcb; /* assoc, used for window update */ 370 TAILQ_ENTRY(sctp_queued_to_read) next; 371 uint16_t port_from; 372 uint8_t do_not_ref_stcb; 373 uint8_t end_added; 374}; 375 376/* This data structure will be on the outbound 377 * stream queues. Data will be pulled off from 378 * the front of the mbuf data and chunk-ified 379 * by the output routines. We will custom 380 * fit every chunk we pull to the send/sent 381 * queue to make up the next full packet 382 * if we can. An entry cannot be removed 383 * from the stream_out queue until 384 * the msg_is_complete flag is set. This 385 * means at times data/tail_mbuf MIGHT 386 * be NULL.. If that occurs it happens 387 * for one of two reasons. Either the user 388 * is blocked on a send() call and has not 389 * awoken to copy more data down... OR 390 * the user is in the explict MSG_EOR mode 391 * and wrote some data, but has not completed 392 * sending. 393 */ 394struct sctp_stream_queue_pending { 395 struct mbuf *data; 396 struct mbuf *tail_mbuf; 397 struct timeval ts; 398 struct sctp_nets *net; 399 TAILQ_ENTRY(sctp_stream_queue_pending) next; 400 uint32_t length; 401 uint32_t timetolive; 402 uint32_t ppid; 403 uint32_t context; 404 uint16_t sinfo_flags; 405 uint16_t stream; 406 uint16_t strseq; 407 uint8_t msg_is_complete; 408 uint8_t some_taken; 409 uint8_t addr_over; 410 uint8_t act_flags; 411 uint8_t pr_sctp_on; 412 uint8_t resv; 413}; 414 415/* 416 * this struct contains info that is used to track inbound stream data and 417 * help with ordering. 418 */ 419TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 420struct sctp_stream_in { 421 struct sctp_readhead inqueue; 422 TAILQ_ENTRY(sctp_stream_in) next_spoke; 423 uint16_t stream_no; 424 uint16_t last_sequence_delivered; /* used for re-order */ 425}; 426 427/* This struct is used to track the traffic on outbound streams */ 428TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 429struct sctp_stream_out { 430 struct sctp_streamhead outqueue; 431 TAILQ_ENTRY(sctp_stream_out) next_spoke; /* next link in wheel */ 432 uint16_t stream_no; 433 uint16_t next_sequence_sent; /* next one I expect to send out */ 434 uint8_t last_msg_incomplete; 435}; 436 437/* used to keep track of the addresses yet to try to add/delete */ 438TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 439struct sctp_asconf_addr { 440 TAILQ_ENTRY(sctp_asconf_addr) next; 441 struct sctp_asconf_addr_param ap; 442 struct ifaddr *ifa; /* save the ifa for add/del ip */ 443 uint8_t sent; /* has this been sent yet? */ 444}; 445 446struct sctp_scoping { 447 uint8_t ipv4_addr_legal; 448 uint8_t ipv6_addr_legal; 449 uint8_t loopback_scope; 450 uint8_t ipv4_local_scope; 451 uint8_t local_scope; 452 uint8_t site_scope; 453}; 454 455/* 456 * Here we have information about each individual association that we track. 457 * We probably in production would be more dynamic. But for ease of 458 * implementation we will have a fixed array that we hunt for in a linear 459 * fashion. 460 */ 461struct sctp_association { 462 /* association state */ 463 int state; 464 /* queue of pending addrs to add/delete */ 465 struct sctp_asconf_addrhead asconf_queue; 466 struct timeval time_entered; /* time we entered state */ 467 struct timeval time_last_rcvd; 468 struct timeval time_last_sent; 469 struct timeval time_last_sat_advance; 470 struct sctp_sndrcvinfo def_send; /* default send parameters */ 471 472 /* timers and such */ 473 struct sctp_timer hb_timer; /* hb timer */ 474 struct sctp_timer dack_timer; /* Delayed ack timer */ 475 struct sctp_timer asconf_timer; /* Asconf */ 476 struct sctp_timer strreset_timer; /* stream reset */ 477 struct sctp_timer shut_guard_timer; /* guard */ 478 struct sctp_timer autoclose_timer; /* automatic close timer */ 479 struct sctp_timer delayed_event_timer; /* timer for delayed events */ 480 481 /* list of local addresses when add/del in progress */ 482 struct sctpladdr sctp_local_addr_list; 483 struct sctpnetlisthead nets; 484 485 /* Free chunk list */ 486 struct sctpchunk_listhead free_chunks; 487 488 /* Free stream output control list */ 489 struct sctp_streamhead free_strmoq; 490 491 /* Control chunk queue */ 492 struct sctpchunk_listhead control_send_queue; 493 494 /* 495 * Once a TSN hits the wire it is moved to the sent_queue. We 496 * maintain two counts here (don't know if any but retran_cnt is 497 * needed). The idea is that the sent_queue_retran_cnt reflects how 498 * many chunks have been marked for retranmission by either T3-rxt 499 * or FR. 500 */ 501 struct sctpchunk_listhead sent_queue; 502 struct sctpchunk_listhead send_queue; 503 504 505 /* re-assembly queue for fragmented chunks on the inbound path */ 506 struct sctpchunk_listhead reasmqueue; 507 508 /* 509 * this queue is used when we reach a condition that we can NOT put 510 * data into the socket buffer. We track the size of this queue and 511 * set our rwnd to the space in the socket minus also the 512 * size_on_delivery_queue. 513 */ 514 struct sctpwheel_listhead out_wheel; 515 516 /* 517 * This pointer will be set to NULL most of the time. But when we 518 * have a fragmented message, where we could not get out all of the 519 * message at the last send then this will point to the stream to go 520 * get data from. 521 */ 522 struct sctp_stream_out *locked_on_sending; 523 524 /* If an iterator is looking at me, this is it */ 525 struct sctp_iterator *stcb_starting_point_for_iterator; 526 527 /* ASCONF destination address last sent to */ 528/* struct sctp_nets *asconf_last_sent_to;*/ 529/* Peter, greppign for the above shows only on strange set 530 * I don't think we need it so I have commented it out. 531 */ 532 533 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 534 struct mbuf *last_asconf_ack_sent; 535 536 /* 537 * pointer to last stream reset queued to control queue by us with 538 * requests. 539 */ 540 struct sctp_tmit_chunk *str_reset; 541 /* 542 * if Source Address Selection happening, this will rotate through 543 * the link list. 544 */ 545 struct sctp_laddr *last_used_address; 546 547 /* stream arrays */ 548 struct sctp_stream_in *strmin; 549 struct sctp_stream_out *strmout; 550 uint8_t *mapping_array; 551 /* primary destination to use */ 552 struct sctp_nets *primary_destination; 553 /* For CMT */ 554 struct sctp_nets *last_net_data_came_from; 555 /* last place I got a data chunk from */ 556 struct sctp_nets *last_data_chunk_from; 557 /* last place I got a control from */ 558 struct sctp_nets *last_control_chunk_from; 559 560 /* circular looking for output selection */ 561 struct sctp_stream_out *last_out_stream; 562 563 /* 564 * wait to the point the cum-ack passes req->send_reset_at_tsn for 565 * any req on the list. 566 */ 567 struct sctp_resethead resetHead; 568 569 /* queue of chunks waiting to be sent into the local stack */ 570 struct sctp_readhead pending_reply_queue; 571 572 uint32_t cookie_preserve_req; 573 /* ASCONF next seq I am sending out, inits at init-tsn */ 574 uint32_t asconf_seq_out; 575 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 576 uint32_t asconf_seq_in; 577 578 /* next seq I am sending in str reset messages */ 579 uint32_t str_reset_seq_out; 580 581 /* next seq I am expecting in str reset messages */ 582 uint32_t str_reset_seq_in; 583 584 585 /* various verification tag information */ 586 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 587 * by remote end, and I have unlocked this 588 * will be regenerated to a new random value. */ 589 uint32_t peer_vtag; /* The peers last tag */ 590 591 uint32_t my_vtag_nonce; 592 uint32_t peer_vtag_nonce; 593 594 uint32_t assoc_id; 595 596 /* This is the SCTP fragmentation threshold */ 597 uint32_t smallest_mtu; 598 599 /* 600 * Special hook for Fast retransmit, allows us to track the highest 601 * TSN that is NEW in this SACK if gap ack blocks are present. 602 */ 603 uint32_t this_sack_highest_gap; 604 605 /* 606 * The highest consecutive TSN that has been acked by peer on my 607 * sends 608 */ 609 uint32_t last_acked_seq; 610 611 /* The next TSN that I will use in sending. */ 612 uint32_t sending_seq; 613 614 /* Original seq number I used ??questionable to keep?? */ 615 uint32_t init_seq_number; 616 617 618 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 619 /* (A1 in Section 4.2) */ 620 uint32_t advanced_peer_ack_point; 621 622 /* 623 * The highest consequetive TSN at the bottom of the mapping array 624 * (for his sends). 625 */ 626 uint32_t cumulative_tsn; 627 /* 628 * Used to track the mapping array and its offset bits. This MAY be 629 * lower then cumulative_tsn. 630 */ 631 uint32_t mapping_array_base_tsn; 632 /* 633 * used to track highest TSN we have received and is listed in the 634 * mapping array. 635 */ 636 uint32_t highest_tsn_inside_map; 637 638 uint32_t last_echo_tsn; 639 uint32_t last_cwr_tsn; 640 uint32_t fast_recovery_tsn; 641 uint32_t sat_t3_recovery_tsn; 642 uint32_t tsn_last_delivered; 643 /* 644 * For the pd-api we should re-write this a bit more efficent. We 645 * could have multiple sctp_queued_to_read's that we are building at 646 * once. Now we only do this when we get ready to deliver to the 647 * socket buffer. Note that we depend on the fact that the struct is 648 * "stuck" on the read queue until we finish all the pd-api. 649 */ 650 struct sctp_queued_to_read *control_pdapi; 651 652 uint32_t tsn_of_pdapi_last_delivered; 653 uint32_t pdapi_ppid; 654 uint32_t context; 655 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 656 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 657 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 658 /* 659 * window state information and smallest MTU that I use to bound 660 * segmentation 661 */ 662 uint32_t peers_rwnd; 663 uint32_t my_rwnd; 664 uint32_t my_last_reported_rwnd; 665 uint32_t my_rwnd_control_len; 666 667 uint32_t total_output_queue_size; 668 669 uint32_t sb_cc; /* shadow of sb_cc in one-2-one */ 670 uint32_t sb_mbcnt; /* shadow of sb_mbcnt in one-2-one */ 671 /* 32 bit nonce stuff */ 672 uint32_t nonce_resync_tsn; 673 uint32_t nonce_wait_tsn; 674 uint32_t default_flowlabel; 675 uint32_t pr_sctp_cnt; 676 int ctrl_queue_cnt; /* could be removed REM */ 677 /* 678 * All outbound datagrams queue into this list from the individual 679 * stream queue. Here they get assigned a TSN and then await 680 * sending. The stream seq comes when it is first put in the 681 * individual str queue 682 */ 683 unsigned int stream_queue_cnt; 684 unsigned int send_queue_cnt; 685 unsigned int sent_queue_cnt; 686 unsigned int sent_queue_cnt_removeable; 687 /* 688 * Number on sent queue that are marked for retran until this value 689 * is 0 we only send one packet of retran'ed data. 690 */ 691 unsigned int sent_queue_retran_cnt; 692 693 unsigned int size_on_reasm_queue; 694 unsigned int cnt_on_reasm_queue; 695 /* amount of data (bytes) currently in flight (on all destinations) */ 696 unsigned int total_flight; 697 /* Total book size in flight */ 698 unsigned int total_flight_count; /* count of chunks used with 699 * book total */ 700 /* count of destinaton nets and list of destination nets */ 701 unsigned int numnets; 702 703 /* Total error count on this association */ 704 unsigned int overall_error_count; 705 706 unsigned int cnt_msg_on_sb; 707 708 /* All stream count of chunks for delivery */ 709 unsigned int size_on_all_streams; 710 unsigned int cnt_on_all_streams; 711 712 /* Heart Beat delay in ticks */ 713 unsigned int heart_beat_delay; 714 715 /* autoclose */ 716 unsigned int sctp_autoclose_ticks; 717 718 /* how many preopen streams we have */ 719 unsigned int pre_open_streams; 720 721 /* How many streams I support coming into me */ 722 unsigned int max_inbound_streams; 723 724 /* the cookie life I award for any cookie, in seconds */ 725 unsigned int cookie_life; 726 /* time to delay acks for */ 727 unsigned int delayed_ack; 728 729 unsigned int numduptsns; 730 int dup_tsns[SCTP_MAX_DUP_TSNS]; 731 unsigned int initial_init_rto_max; /* initial RTO for INIT's */ 732 unsigned int initial_rto; /* initial send RTO */ 733 unsigned int minrto; /* per assoc RTO-MIN */ 734 unsigned int maxrto; /* per assoc RTO-MAX */ 735 736 /* authentication fields */ 737 sctp_auth_chklist_t *local_auth_chunks; 738 sctp_auth_chklist_t *peer_auth_chunks; 739 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 740 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 741 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 742 sctp_authinfo_t authinfo; /* randoms, cached keys */
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743 uint16_t peer_hmac_id; /* peer HMAC id to send */
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743 /* 744 * refcnt to block freeing when a sender or receiver is off coping 745 * user data in. 746 */
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748 uint16_t refcnt;
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747 uint32_t refcnt; 748 uint32_t chunks_on_out_queue; /* total chunks floating around, 749 * locked by send socket buffer */ |
750
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751 uint16_t peer_hmac_id; /* peer HMAC id to send */ 752 |
753 /* 754 * Being that we have no bag to collect stale cookies, and that we 755 * really would not want to anyway.. we will count them in this 756 * counter. We of course feed them to the pigeons right away (I have 757 * always thought of pigeons as flying rats). 758 */ 759 uint16_t stale_cookie_count; 760 761 /* 762 * For the partial delivery API, if up, invoked this is what last 763 * TSN I delivered 764 */ 765 uint16_t str_of_pdapi; 766 uint16_t ssn_of_pdapi; 767 768 /* counts of actual built streams. Allocation may be more however */ 769 /* could re-arrange to optimize space here. */ 770 uint16_t streamincnt; 771 uint16_t streamoutcnt; 772 773 /* my maximum number of retrans of INIT and SEND */ 774 /* copied from SCTP but should be individually setable */ 775 uint16_t max_init_times; 776 uint16_t max_send_times; 777 778 uint16_t def_net_failure; 779 780 /* 781 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 782 * awaiting ACK 783 */ 784 uint16_t asconf_sent; /* possibly removable REM */ 785 uint16_t mapping_array_size; 786 787 uint16_t last_strm_seq_delivered; 788 uint16_t last_strm_no_delivered; 789
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787 uint16_t chunks_on_out_queue; /* total chunks floating around,
788 * locked by send socket buffer */
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790 uint16_t last_revoke_count; 791 int16_t num_send_timers_up; 792 793 uint16_t stream_locked_on; 794 uint16_t ecn_echo_cnt_onq; 795 796 uint16_t free_chunk_cnt; 797 uint16_t free_strmoq_cnt; 798 799 uint8_t stream_locked; 800 uint8_t authenticated; /* packet authenticated ok */ 801 /* 802 * This flag indicates that we need to send the first SACK. If in 803 * place it says we have NOT yet sent a SACK and need to. 804 */ 805 uint8_t first_ack_sent; 806 807 /* max burst after fast retransmit completes */ 808 uint8_t max_burst; 809 810 uint8_t sat_network; /* RTT is in range of sat net or greater */ 811 uint8_t sat_network_lockout; /* lockout code */ 812 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 813 /* flag goes on when we are doing a partial delivery api */ 814 uint8_t hb_random_values[4]; 815 uint8_t fragmented_delivery_inprogress; 816 uint8_t fragment_flags; 817 uint8_t last_flags_delivered; 818 uint8_t hb_ect_randombit; 819 uint8_t hb_random_idx; 820 uint8_t hb_is_disabled; /* is the hb disabled? */ 821 uint8_t default_tos; 822 823 /* ECN Nonce stuff */ 824 uint8_t receiver_nonce_sum; /* nonce I sum and put in my sack */ 825 uint8_t ecn_nonce_allowed; /* Tells us if ECN nonce is on */ 826 uint8_t nonce_sum_check;/* On off switch used during re-sync */ 827 uint8_t nonce_wait_for_ecne; /* flag when we expect a ECN */ 828 uint8_t peer_supports_ecn_nonce; 829 830 /* 831 * This value, plus all other ack'd but above cum-ack is added 832 * together to cross check against the bit that we have yet to 833 * define (probably in the SACK). When the cum-ack is updated, this 834 * sum is updated as well. 835 */ 836 uint8_t nonce_sum_expect_base; 837 /* Flag to tell if ECN is allowed */ 838 uint8_t ecn_allowed; 839 840 /* flag to indicate if peer can do asconf */ 841 uint8_t peer_supports_asconf; 842 /* pr-sctp support flag */ 843 uint8_t peer_supports_prsctp; 844 /* peer authentication support flag */ 845 uint8_t peer_supports_auth; 846 /* stream resets are supported by the peer */ 847 uint8_t peer_supports_strreset; 848 849 /* 850 * packet drop's are supported by the peer, we don't really care 851 * about this but we bookkeep it anyway. 852 */ 853 uint8_t peer_supports_pktdrop; 854 855 /* Do we allow V6/V4? */ 856 uint8_t ipv4_addr_legal; 857 uint8_t ipv6_addr_legal; 858 /* Address scoping flags */ 859 /* scope value for IPv4 */ 860 uint8_t ipv4_local_scope; 861 /* scope values for IPv6 */ 862 uint8_t local_scope; 863 uint8_t site_scope; 864 /* loopback scope */ 865 uint8_t loopback_scope; 866 /* flags to handle send alternate net tracking */ 867 uint8_t used_alt_onsack; 868 uint8_t used_alt_asconfack; 869 uint8_t fast_retran_loss_recovery; 870 uint8_t sat_t3_loss_recovery; 871 uint8_t dropped_special_cnt; 872 uint8_t seen_a_sack_this_pkt; 873 uint8_t stream_reset_outstanding; 874 uint8_t stream_reset_out_is_outstanding; 875 uint8_t delayed_connection; 876 uint8_t ifp_had_enobuf; 877 uint8_t saw_sack_with_frags; 878 uint8_t in_restart_hash; 879 uint8_t assoc_up_sent; 880 /* CMT variables */ 881 uint8_t cmt_dac_pkts_rcvd; 882 uint8_t sctp_cmt_on_off; 883 uint8_t iam_blocking; 884 /* 885 * The mapping array is used to track out of order sequences above 886 * last_acked_seq. 0 indicates packet missing 1 indicates packet 887 * rec'd. We slide it up every time we raise last_acked_seq and 0 888 * trailing locactions out. If I get a TSN above the array 889 * mappingArraySz, I discard the datagram and let retransmit happen. 890 */ 891}; 892 893#endif
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