1 /*- 2 * Copyright (c) 2001-2007, 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> 34 __FBSDID("$FreeBSD$"); 35 36 #ifndef __sctp_structs_h__ 37 #define __sctp_structs_h__ 38 39 #include <netinet/sctp_os.h> 40 #include <netinet/sctp_header.h> 41 #include <netinet/sctp_uio.h> 42 #include <netinet/sctp_auth.h> 43 44 struct sctp_timer { 45 sctp_os_timer_t timer; 46 47 int type; 48 /* 49 * Depending on the timer type these will be setup and cast with the 50 * appropriate entity. 51 */ 52 void *ep; 53 void *tcb; 54 void *net; 55 56 /* for sanity checking */ 57 void *self; 58 uint32_t ticks; 59 uint32_t stopped_from; 60 }; 61 62 struct sctp_nonpad_sndrcvinfo { 63 uint16_t sinfo_stream; 64 uint16_t sinfo_ssn; 65 uint16_t sinfo_flags; 66 uint32_t sinfo_ppid; 67 uint32_t sinfo_context; 68 uint32_t sinfo_timetolive; 69 uint32_t sinfo_tsn; 70 uint32_t sinfo_cumtsn; 71 sctp_assoc_t sinfo_assoc_id; 72 }; 73 74 struct sctp_foo_stuff { 75 struct sctp_inpcb *inp; 76 uint32_t lineno; 77 uint32_t ticks; 78 int updown; 79 }; 80 81 82 /* 83 * This is the information we track on each interface that we know about from 84 * the distant end. 85 */ 86 TAILQ_HEAD(sctpnetlisthead, sctp_nets); 87 88 struct 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 95 TAILQ_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, inp_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 114 115 typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr, 116 uint32_t val); 117 typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val); 118 typedef void (*end_func) (void *ptr, uint32_t val); 119 120 struct sctp_iterator { 121 TAILQ_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 inp_func function_inp_end; /* end INP function */ 128 end_func function_atend;/* iterator completion function */ 129 void *pointer; /* pointer for apply func to use */ 130 uint32_t val; /* value for apply func to use */ 131 uint32_t pcb_flags; /* endpoint flags being checked */ 132 uint32_t pcb_features; /* endpoint features being checked */ 133 uint32_t asoc_state; /* assoc state being checked */ 134 uint32_t iterator_flags; 135 uint8_t no_chunk_output; 136 uint8_t done_current_ep; 137 }; 138 139 /* iterator_flags values */ 140 #define SCTP_ITERATOR_DO_ALL_INP 0x00000001 141 #define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002 142 143 TAILQ_HEAD(sctpiterators, sctp_iterator); 144 145 struct sctp_copy_all { 146 struct sctp_inpcb *inp; /* ep */ 147 struct mbuf *m; 148 struct sctp_sndrcvinfo sndrcv; 149 int sndlen; 150 int cnt_sent; 151 int cnt_failed; 152 }; 153 154 struct sctp_asconf_iterator { 155 struct sctpladdr list_of_work; 156 int cnt; 157 }; 158 159 160 struct sctp_nets { 161 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */ 162 163 /* 164 * Things on the top half may be able to be split into a common 165 * structure shared by all. 166 */ 167 struct sctp_timer pmtu_timer; 168 169 /* 170 * The following two in combination equate to a route entry for v6 171 * or v4. 172 */ 173 struct sctp_route { 174 struct rtentry *ro_rt; 175 union sctp_sockstore _l_addr; /* remote peer addr */ 176 struct sctp_ifa *_s_addr; /* our selected src addr */ 177 } ro; 178 /* mtu discovered so far */ 179 uint32_t mtu; 180 uint32_t ssthresh; /* not sure about this one for split */ 181 182 /* smoothed average things for RTT and RTO itself */ 183 int lastsa; 184 int lastsv; 185 unsigned int RTO; 186 187 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */ 188 struct sctp_timer rxt_timer; 189 struct sctp_timer fr_timer; /* for early fr */ 190 191 /* last time in seconds I sent to it */ 192 struct timeval last_sent_time; 193 int ref_count; 194 195 /* Congestion stats per destination */ 196 /* 197 * flight size variables and such, sorry Vern, I could not avoid 198 * this if I wanted performance :> 199 */ 200 uint32_t flight_size; 201 uint32_t cwnd; /* actual cwnd */ 202 uint32_t prev_cwnd; /* cwnd before any processing */ 203 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */ 204 uint32_t prev_rtt; 205 /* tracking variables to avoid the aloc/free in sack processing */ 206 unsigned int net_ack; 207 unsigned int net_ack2; 208 209 /* 210 * CMT variables (iyengar@cis.udel.edu) 211 */ 212 uint32_t this_sack_highest_newack; /* tracks highest TSN newly 213 * acked for a given dest in 214 * the current SACK. Used in 215 * SFR and HTNA algos */ 216 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected 217 * pseudo-cumack for this destination */ 218 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next 219 * expected pseudo-cumack for this 220 * destination */ 221 222 /* CMT fast recovery variables */ 223 uint32_t fast_recovery_tsn; 224 uint32_t heartbeat_random1; 225 uint32_t heartbeat_random2; 226 uint32_t tos_flowlabel; 227 228 struct timeval start_time; /* time when this net was created */ 229 230 uint32_t marked_retrans;/* number or DATA chunks marked for timer 231 * based retransmissions */ 232 uint32_t marked_fastretrans; 233 234 /* if this guy is ok or not ... status */ 235 uint16_t dest_state; 236 /* number of transmit failures to down this guy */ 237 uint16_t failure_threshold; 238 /* error stats on destination */ 239 uint16_t error_count; 240 241 uint8_t fast_retran_loss_recovery; 242 uint8_t will_exit_fast_recovery; 243 /* Flags that probably can be combined into dest_state */ 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 uint8_t window_probe; /* Doing a window probe? */ 274 #ifdef SCTP_HIGH_SPEED 275 uint8_t last_hs_used; /* index into the last HS table entry we used */ 276 #endif 277 }; 278 279 280 struct sctp_data_chunkrec { 281 uint32_t TSN_seq; /* the TSN of this transmit */ 282 uint16_t stream_seq; /* the stream sequence number of this transmit */ 283 uint16_t stream_number; /* the stream number of this guy */ 284 uint32_t payloadtype; 285 uint32_t context; /* from send */ 286 287 /* ECN Nonce: Nonce Value for this chunk */ 288 uint8_t ect_nonce; 289 290 /* 291 * part of the Highest sacked algorithm to be able to stroke counts 292 * on ones that are FR'd. 293 */ 294 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 295 struct timeval timetodrop; /* time we drop it from queue */ 296 uint8_t doing_fast_retransmit; 297 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 298 * outbound holds sending flags for PR-SCTP. */ 299 uint8_t state_flags; 300 uint8_t chunk_was_revoked; 301 }; 302 303 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 304 305 /* The lower byte is used to enumerate PR_SCTP policies */ 306 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 307 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 308 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 309 310 /* The upper byte is used a a bit mask */ 311 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100 312 313 struct chk_id { 314 uint16_t id; 315 uint16_t can_take_data; 316 }; 317 318 319 struct sctp_tmit_chunk { 320 union { 321 struct sctp_data_chunkrec data; 322 struct chk_id chunk_id; 323 } rec; 324 struct sctp_association *asoc; /* bp to asoc this belongs to */ 325 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 326 struct mbuf *data; /* pointer to mbuf chain of data */ 327 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 328 struct sctp_nets *whoTo; 329 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 330 int32_t sent; /* the send status */ 331 uint16_t snd_count; /* number of times I sent */ 332 uint16_t flags; /* flags, such as FRAGMENT_OK */ 333 uint16_t send_size; 334 uint16_t book_size; 335 uint16_t mbcnt; 336 uint8_t pad_inplace; 337 uint8_t do_rtt; 338 uint8_t book_size_scale; 339 uint8_t addr_over; /* flag which is set if the dest address for 340 * this chunk is overridden by user. Used for 341 * CMT (iyengar@cis.udel.edu, 2005/06/21) */ 342 uint8_t no_fr_allowed; 343 uint8_t pr_sctp_on; 344 uint8_t copy_by_ref; 345 uint8_t window_probe; 346 }; 347 348 /* 349 * The first part of this structure MUST be the entire sinfo structure. Maybe 350 * I should have made it a sub structure... we can circle back later and do 351 * that if we want. 352 */ 353 struct sctp_queued_to_read { /* sinfo structure Pluse more */ 354 uint16_t sinfo_stream; /* off the wire */ 355 uint16_t sinfo_ssn; /* off the wire */ 356 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for 357 * EOR */ 358 uint32_t sinfo_ppid; /* off the wire */ 359 uint32_t sinfo_context; /* pick this up from assoc def context? */ 360 uint32_t sinfo_timetolive; /* not used by kernel */ 361 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */ 362 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */ 363 sctp_assoc_t sinfo_assoc_id; /* our assoc id */ 364 /* Non sinfo stuff */ 365 uint32_t length; /* length of data */ 366 uint32_t held_length; /* length held in sb */ 367 struct sctp_nets *whoFrom; /* where it came from */ 368 struct mbuf *data; /* front of the mbuf chain of data with 369 * PKT_HDR */ 370 struct mbuf *tail_mbuf; /* used for multi-part data */ 371 struct sctp_tcb *stcb; /* assoc, used for window update */ 372 TAILQ_ENTRY(sctp_queued_to_read) next; 373 uint16_t port_from; 374 uint16_t spec_flags; /* Flags to hold the notification field */ 375 uint8_t do_not_ref_stcb; 376 uint8_t end_added; 377 uint8_t pdapi_aborted; 378 uint8_t resv; 379 }; 380 381 /* This data structure will be on the outbound 382 * stream queues. Data will be pulled off from 383 * the front of the mbuf data and chunk-ified 384 * by the output routines. We will custom 385 * fit every chunk we pull to the send/sent 386 * queue to make up the next full packet 387 * if we can. An entry cannot be removed 388 * from the stream_out queue until 389 * the msg_is_complete flag is set. This 390 * means at times data/tail_mbuf MIGHT 391 * be NULL.. If that occurs it happens 392 * for one of two reasons. Either the user 393 * is blocked on a send() call and has not 394 * awoken to copy more data down... OR 395 * the user is in the explict MSG_EOR mode 396 * and wrote some data, but has not completed 397 * sending. 398 */ 399 struct sctp_stream_queue_pending { 400 struct mbuf *data; 401 struct mbuf *tail_mbuf; 402 struct timeval ts; 403 struct sctp_nets *net; 404 TAILQ_ENTRY(sctp_stream_queue_pending) next; 405 uint32_t length; 406 uint32_t timetolive; 407 uint32_t ppid; 408 uint32_t context; 409 uint16_t sinfo_flags; 410 uint16_t stream; 411 uint16_t strseq; 412 uint16_t act_flags; 413 uint8_t msg_is_complete; 414 uint8_t some_taken; 415 uint8_t addr_over; 416 uint8_t pr_sctp_on; 417 }; 418 419 /* 420 * this struct contains info that is used to track inbound stream data and 421 * help with ordering. 422 */ 423 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 424 struct sctp_stream_in { 425 struct sctp_readhead inqueue; 426 TAILQ_ENTRY(sctp_stream_in) next_spoke; 427 uint16_t stream_no; 428 uint16_t last_sequence_delivered; /* used for re-order */ 429 }; 430 431 /* This struct is used to track the traffic on outbound streams */ 432 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 433 struct sctp_stream_out { 434 struct sctp_streamhead outqueue; 435 TAILQ_ENTRY(sctp_stream_out) next_spoke; /* next link in wheel */ 436 uint16_t stream_no; 437 uint16_t next_sequence_sent; /* next one I expect to send out */ 438 uint8_t last_msg_incomplete; 439 }; 440 441 /* used to keep track of the addresses yet to try to add/delete */ 442 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 443 struct sctp_asconf_addr { 444 TAILQ_ENTRY(sctp_asconf_addr) next; 445 struct sctp_asconf_addr_param ap; 446 struct sctp_ifa *ifa; /* save the ifa for add/del ip */ 447 uint8_t sent; /* has this been sent yet? */ 448 }; 449 450 struct sctp_scoping { 451 uint8_t ipv4_addr_legal; 452 uint8_t ipv6_addr_legal; 453 uint8_t loopback_scope; 454 uint8_t ipv4_local_scope; 455 uint8_t local_scope; 456 uint8_t site_scope; 457 }; 458 459 #define SCTP_TSN_LOG_SIZE 40 460 461 struct sctp_tsn_log { 462 uint32_t tsn; 463 uint16_t strm; 464 uint16_t seq; 465 }; 466 467 /* 468 * Here we have information about each individual association that we track. 469 * We probably in production would be more dynamic. But for ease of 470 * implementation we will have a fixed array that we hunt for in a linear 471 * fashion. 472 */ 473 struct sctp_association { 474 /* association state */ 475 int state; 476 /* queue of pending addrs to add/delete */ 477 struct sctp_asconf_addrhead asconf_queue; 478 struct timeval time_entered; /* time we entered state */ 479 struct timeval time_last_rcvd; 480 struct timeval time_last_sent; 481 struct timeval time_last_sat_advance; 482 struct sctp_sndrcvinfo def_send; /* default send parameters */ 483 484 /* timers and such */ 485 struct sctp_timer hb_timer; /* hb timer */ 486 struct sctp_timer dack_timer; /* Delayed ack timer */ 487 struct sctp_timer asconf_timer; /* Asconf */ 488 struct sctp_timer strreset_timer; /* stream reset */ 489 struct sctp_timer shut_guard_timer; /* guard */ 490 struct sctp_timer autoclose_timer; /* automatic close timer */ 491 struct sctp_timer delayed_event_timer; /* timer for delayed events */ 492 493 /* list of local addresses when add/del in progress */ 494 struct sctpladdr sctp_restricted_addrs; 495 496 struct sctpnetlisthead nets; 497 498 /* Free chunk list */ 499 struct sctpchunk_listhead free_chunks; 500 501 /* Free stream output control list */ 502 struct sctp_streamhead free_strmoq; 503 504 /* Control chunk queue */ 505 struct sctpchunk_listhead control_send_queue; 506 507 /* 508 * Once a TSN hits the wire it is moved to the sent_queue. We 509 * maintain two counts here (don't know if any but retran_cnt is 510 * needed). The idea is that the sent_queue_retran_cnt reflects how 511 * many chunks have been marked for retranmission by either T3-rxt 512 * or FR. 513 */ 514 struct sctpchunk_listhead sent_queue; 515 struct sctpchunk_listhead send_queue; 516 517 518 /* re-assembly queue for fragmented chunks on the inbound path */ 519 struct sctpchunk_listhead reasmqueue; 520 521 /* 522 * this queue is used when we reach a condition that we can NOT put 523 * data into the socket buffer. We track the size of this queue and 524 * set our rwnd to the space in the socket minus also the 525 * size_on_delivery_queue. 526 */ 527 struct sctpwheel_listhead out_wheel; 528 529 /* 530 * This pointer will be set to NULL most of the time. But when we 531 * have a fragmented message, where we could not get out all of the 532 * message at the last send then this will point to the stream to go 533 * get data from. 534 */ 535 struct sctp_stream_out *locked_on_sending; 536 537 /* If an iterator is looking at me, this is it */ 538 struct sctp_iterator *stcb_starting_point_for_iterator; 539 540 /* ASCONF destination address last sent to */ 541 /* struct sctp_nets *asconf_last_sent_to;*/ 542 /* Peter, greppign for the above shows only on strange set 543 * I don't think we need it so I have commented it out. 544 */ 545 546 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 547 struct mbuf *last_asconf_ack_sent; 548 549 /* 550 * pointer to last stream reset queued to control queue by us with 551 * requests. 552 */ 553 struct sctp_tmit_chunk *str_reset; 554 /* 555 * if Source Address Selection happening, this will rotate through 556 * the link list. 557 */ 558 struct sctp_laddr *last_used_address; 559 560 /* stream arrays */ 561 struct sctp_stream_in *strmin; 562 struct sctp_stream_out *strmout; 563 uint8_t *mapping_array; 564 /* primary destination to use */ 565 struct sctp_nets *primary_destination; 566 /* For CMT */ 567 struct sctp_nets *last_net_data_came_from; 568 /* last place I got a data chunk from */ 569 struct sctp_nets *last_data_chunk_from; 570 /* last place I got a control from */ 571 struct sctp_nets *last_control_chunk_from; 572 573 /* circular looking for output selection */ 574 struct sctp_stream_out *last_out_stream; 575 576 /* 577 * wait to the point the cum-ack passes req->send_reset_at_tsn for 578 * any req on the list. 579 */ 580 struct sctp_resethead resetHead; 581 582 /* queue of chunks waiting to be sent into the local stack */ 583 struct sctp_readhead pending_reply_queue; 584 585 uint32_t vrf_id; 586 587 uint32_t cookie_preserve_req; 588 /* ASCONF next seq I am sending out, inits at init-tsn */ 589 uint32_t asconf_seq_out; 590 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 591 uint32_t asconf_seq_in; 592 593 /* next seq I am sending in str reset messages */ 594 uint32_t str_reset_seq_out; 595 596 /* next seq I am expecting in str reset messages */ 597 uint32_t str_reset_seq_in; 598 599 600 /* various verification tag information */ 601 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 602 * by remote end, and I have unlocked this 603 * will be regenerated to a new random value. */ 604 uint32_t peer_vtag; /* The peers last tag */ 605 606 uint32_t my_vtag_nonce; 607 uint32_t peer_vtag_nonce; 608 609 uint32_t assoc_id; 610 611 /* This is the SCTP fragmentation threshold */ 612 uint32_t smallest_mtu; 613 614 /* 615 * Special hook for Fast retransmit, allows us to track the highest 616 * TSN that is NEW in this SACK if gap ack blocks are present. 617 */ 618 uint32_t this_sack_highest_gap; 619 620 /* 621 * The highest consecutive TSN that has been acked by peer on my 622 * sends 623 */ 624 uint32_t last_acked_seq; 625 626 /* The next TSN that I will use in sending. */ 627 uint32_t sending_seq; 628 629 /* Original seq number I used ??questionable to keep?? */ 630 uint32_t init_seq_number; 631 632 633 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 634 /* (A1 in Section 4.2) */ 635 uint32_t advanced_peer_ack_point; 636 637 /* 638 * The highest consequetive TSN at the bottom of the mapping array 639 * (for his sends). 640 */ 641 uint32_t cumulative_tsn; 642 /* 643 * Used to track the mapping array and its offset bits. This MAY be 644 * lower then cumulative_tsn. 645 */ 646 uint32_t mapping_array_base_tsn; 647 /* 648 * used to track highest TSN we have received and is listed in the 649 * mapping array. 650 */ 651 uint32_t highest_tsn_inside_map; 652 653 uint32_t last_echo_tsn; 654 uint32_t last_cwr_tsn; 655 uint32_t fast_recovery_tsn; 656 uint32_t sat_t3_recovery_tsn; 657 uint32_t tsn_last_delivered; 658 /* 659 * For the pd-api we should re-write this a bit more efficent. We 660 * could have multiple sctp_queued_to_read's that we are building at 661 * once. Now we only do this when we get ready to deliver to the 662 * socket buffer. Note that we depend on the fact that the struct is 663 * "stuck" on the read queue until we finish all the pd-api. 664 */ 665 struct sctp_queued_to_read *control_pdapi; 666 667 uint32_t tsn_of_pdapi_last_delivered; 668 uint32_t pdapi_ppid; 669 uint32_t context; 670 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 671 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 672 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 673 #ifdef SCTP_ASOCLOG_OF_TSNS 674 /* 675 * special log - This adds considerable size to the asoc, but 676 * provides a log that you can use to detect problems via kgdb. 677 */ 678 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE]; 679 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE]; 680 uint16_t tsn_in_at; 681 uint16_t tsn_out_at; 682 #endif /* SCTP_ASOCLOG_OF_TSNS */ 683 /* 684 * window state information and smallest MTU that I use to bound 685 * segmentation 686 */ 687 uint32_t peers_rwnd; 688 uint32_t my_rwnd; 689 uint32_t my_last_reported_rwnd; 690 uint32_t my_rwnd_control_len; 691 692 uint32_t total_output_queue_size; 693 694 uint32_t sb_cc; /* shadow of sb_cc in one-2-one */ 695 uint32_t sb_mbcnt; /* shadow of sb_mbcnt in one-2-one */ 696 /* 32 bit nonce stuff */ 697 uint32_t nonce_resync_tsn; 698 uint32_t nonce_wait_tsn; 699 uint32_t default_flowlabel; 700 uint32_t pr_sctp_cnt; 701 int ctrl_queue_cnt; /* could be removed REM */ 702 /* 703 * All outbound datagrams queue into this list from the individual 704 * stream queue. Here they get assigned a TSN and then await 705 * sending. The stream seq comes when it is first put in the 706 * individual str queue 707 */ 708 unsigned int stream_queue_cnt; 709 unsigned int send_queue_cnt; 710 unsigned int sent_queue_cnt; 711 unsigned int sent_queue_cnt_removeable; 712 /* 713 * Number on sent queue that are marked for retran until this value 714 * is 0 we only send one packet of retran'ed data. 715 */ 716 unsigned int sent_queue_retran_cnt; 717 718 unsigned int size_on_reasm_queue; 719 unsigned int cnt_on_reasm_queue; 720 /* amount of data (bytes) currently in flight (on all destinations) */ 721 unsigned int total_flight; 722 /* Total book size in flight */ 723 unsigned int total_flight_count; /* count of chunks used with 724 * book total */ 725 /* count of destinaton nets and list of destination nets */ 726 unsigned int numnets; 727 728 /* Total error count on this association */ 729 unsigned int overall_error_count; 730 731 unsigned int cnt_msg_on_sb; 732 733 /* All stream count of chunks for delivery */ 734 unsigned int size_on_all_streams; 735 unsigned int cnt_on_all_streams; 736 737 /* Heart Beat delay in ticks */ 738 unsigned int heart_beat_delay; 739 740 /* autoclose */ 741 unsigned int sctp_autoclose_ticks; 742 743 /* how many preopen streams we have */ 744 unsigned int pre_open_streams; 745 746 /* How many streams I support coming into me */ 747 unsigned int max_inbound_streams; 748 749 /* the cookie life I award for any cookie, in seconds */ 750 unsigned int cookie_life; 751 /* time to delay acks for */ 752 unsigned int delayed_ack; 753 unsigned int old_delayed_ack; 754 unsigned int sack_freq; 755 unsigned int data_pkts_seen; 756 757 unsigned int numduptsns; 758 int dup_tsns[SCTP_MAX_DUP_TSNS]; 759 unsigned int initial_init_rto_max; /* initial RTO for INIT's */ 760 unsigned int initial_rto; /* initial send RTO */ 761 unsigned int minrto; /* per assoc RTO-MIN */ 762 unsigned int maxrto; /* per assoc RTO-MAX */ 763 764 /* authentication fields */ 765 sctp_auth_chklist_t *local_auth_chunks; 766 sctp_auth_chklist_t *peer_auth_chunks; 767 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 768 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 769 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 770 sctp_authinfo_t authinfo; /* randoms, cached keys */ 771 /* 772 * refcnt to block freeing when a sender or receiver is off coping 773 * user data in. 774 */ 775 uint32_t refcnt; 776 uint32_t chunks_on_out_queue; /* total chunks floating around, 777 * locked by send socket buffer */ 778 779 uint16_t peer_hmac_id; /* peer HMAC id to send */ 780 781 /* 782 * Being that we have no bag to collect stale cookies, and that we 783 * really would not want to anyway.. we will count them in this 784 * counter. We of course feed them to the pigeons right away (I have 785 * always thought of pigeons as flying rats). 786 */ 787 uint16_t stale_cookie_count; 788 789 /* 790 * For the partial delivery API, if up, invoked this is what last 791 * TSN I delivered 792 */ 793 uint16_t str_of_pdapi; 794 uint16_t ssn_of_pdapi; 795 796 /* counts of actual built streams. Allocation may be more however */ 797 /* could re-arrange to optimize space here. */ 798 uint16_t streamincnt; 799 uint16_t streamoutcnt; 800 801 /* my maximum number of retrans of INIT and SEND */ 802 /* copied from SCTP but should be individually setable */ 803 uint16_t max_init_times; 804 uint16_t max_send_times; 805 806 uint16_t def_net_failure; 807 808 /* 809 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 810 * awaiting ACK 811 */ 812 uint16_t asconf_sent; /* possibly removable REM */ 813 uint16_t mapping_array_size; 814 815 uint16_t last_strm_seq_delivered; 816 uint16_t last_strm_no_delivered; 817 818 uint16_t last_revoke_count; 819 int16_t num_send_timers_up; 820 821 uint16_t stream_locked_on; 822 uint16_t ecn_echo_cnt_onq; 823 824 uint16_t free_chunk_cnt; 825 uint16_t free_strmoq_cnt; 826 827 uint8_t stream_locked; 828 uint8_t authenticated; /* packet authenticated ok */ 829 /* 830 * This flag indicates that a SACK need to be sent. Initially this 831 * is 1 to send the first sACK immediately. 832 */ 833 uint8_t send_sack; 834 835 /* max burst after fast retransmit completes */ 836 uint8_t max_burst; 837 838 uint8_t sat_network; /* RTT is in range of sat net or greater */ 839 uint8_t sat_network_lockout; /* lockout code */ 840 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 841 /* flag goes on when we are doing a partial delivery api */ 842 uint8_t hb_random_values[4]; 843 uint8_t fragmented_delivery_inprogress; 844 uint8_t fragment_flags; 845 uint8_t last_flags_delivered; 846 uint8_t hb_ect_randombit; 847 uint8_t hb_random_idx; 848 uint8_t hb_is_disabled; /* is the hb disabled? */ 849 uint8_t default_tos; 850 851 /* ECN Nonce stuff */ 852 uint8_t receiver_nonce_sum; /* nonce I sum and put in my sack */ 853 uint8_t ecn_nonce_allowed; /* Tells us if ECN nonce is on */ 854 uint8_t nonce_sum_check;/* On off switch used during re-sync */ 855 uint8_t nonce_wait_for_ecne; /* flag when we expect a ECN */ 856 uint8_t peer_supports_ecn_nonce; 857 858 /* 859 * This value, plus all other ack'd but above cum-ack is added 860 * together to cross check against the bit that we have yet to 861 * define (probably in the SACK). When the cum-ack is updated, this 862 * sum is updated as well. 863 */ 864 uint8_t nonce_sum_expect_base; 865 /* Flag to tell if ECN is allowed */ 866 uint8_t ecn_allowed; 867 868 /* flag to indicate if peer can do asconf */ 869 uint8_t peer_supports_asconf; 870 /* pr-sctp support flag */ 871 uint8_t peer_supports_prsctp; 872 /* peer authentication support flag */ 873 uint8_t peer_supports_auth; 874 /* stream resets are supported by the peer */ 875 uint8_t peer_supports_strreset; 876 877 /* 878 * packet drop's are supported by the peer, we don't really care 879 * about this but we bookkeep it anyway. 880 */ 881 uint8_t peer_supports_pktdrop; 882 883 /* Do we allow V6/V4? */ 884 uint8_t ipv4_addr_legal; 885 uint8_t ipv6_addr_legal; 886 /* Address scoping flags */ 887 /* scope value for IPv4 */ 888 uint8_t ipv4_local_scope; 889 /* scope values for IPv6 */ 890 uint8_t local_scope; 891 uint8_t site_scope; 892 /* loopback scope */ 893 uint8_t loopback_scope; 894 /* flags to handle send alternate net tracking */ 895 uint8_t used_alt_onsack; 896 uint8_t used_alt_asconfack; 897 uint8_t fast_retran_loss_recovery; 898 uint8_t sat_t3_loss_recovery; 899 uint8_t dropped_special_cnt; 900 uint8_t seen_a_sack_this_pkt; 901 uint8_t stream_reset_outstanding; 902 uint8_t stream_reset_out_is_outstanding; 903 uint8_t delayed_connection; 904 uint8_t ifp_had_enobuf; 905 uint8_t saw_sack_with_frags; 906 uint8_t in_restart_hash; 907 uint8_t assoc_up_sent; 908 /* CMT variables */ 909 uint8_t cmt_dac_pkts_rcvd; 910 uint8_t sctp_cmt_on_off; 911 uint8_t iam_blocking; 912 uint8_t cookie_how[8]; 913 /* 914 * The mapping array is used to track out of order sequences above 915 * last_acked_seq. 0 indicates packet missing 1 indicates packet 916 * rec'd. We slide it up every time we raise last_acked_seq and 0 917 * trailing locactions out. If I get a TSN above the array 918 * mappingArraySz, I discard the datagram and let retransmit happen. 919 */ 920 uint32_t marked_retrans; 921 uint32_t timoinit; 922 uint32_t timodata; 923 uint32_t timosack; 924 uint32_t timoshutdown; 925 uint32_t timoheartbeat; 926 uint32_t timocookie; 927 uint32_t timoshutdownack; 928 struct timeval start_time; 929 struct timeval discontinuity_time; 930 }; 931 932 #endif 933