1 /*- 2 * Copyright (c) 2001-2007, by 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_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 55 /* for sanity checking */ 56 void *self; 57 uint32_t ticks; 58 uint32_t stopped_from; 59 }; 60 61 62 struct sctp_foo_stuff { 63 struct sctp_inpcb *inp; 64 uint32_t lineno; 65 uint32_t ticks; 66 int updown; 67 }; 68 69 70 /* 71 * This is the information we track on each interface that we know about from 72 * the distant end. 73 */ 74 TAILQ_HEAD(sctpnetlisthead, sctp_nets); 75 76 struct sctp_stream_reset_list { 77 TAILQ_ENTRY(sctp_stream_reset_list) next_resp; 78 uint32_t tsn; 79 int number_entries; 80 struct sctp_stream_reset_out_request req; 81 }; 82 83 TAILQ_HEAD(sctp_resethead, sctp_stream_reset_list); 84 85 /* 86 * Users of the iterator need to malloc a iterator with a call to 87 * sctp_initiate_iterator(inp_func, assoc_func, inp_func, pcb_flags, pcb_features, 88 * asoc_state, void-ptr-arg, uint32-arg, end_func, inp); 89 * 90 * Use the following two defines if you don't care what pcb flags are on the EP 91 * and/or you don't care what state the association is in. 92 * 93 * Note that if you specify an INP as the last argument then ONLY each 94 * association of that single INP will be executed upon. Note that the pcb 95 * flags STILL apply so if the inp you specify has different pcb_flags then 96 * what you put in pcb_flags nothing will happen. use SCTP_PCB_ANY_FLAGS to 97 * assure the inp you specify gets treated. 98 */ 99 #define SCTP_PCB_ANY_FLAGS 0x00000000 100 #define SCTP_PCB_ANY_FEATURES 0x00000000 101 #define SCTP_ASOC_ANY_STATE 0x00000000 102 103 typedef void (*asoc_func) (struct sctp_inpcb *, struct sctp_tcb *, void *ptr, 104 uint32_t val); 105 typedef int (*inp_func) (struct sctp_inpcb *, void *ptr, uint32_t val); 106 typedef void (*end_func) (void *ptr, uint32_t val); 107 108 struct sctp_iterator { 109 TAILQ_ENTRY(sctp_iterator) sctp_nxt_itr; 110 struct sctp_timer tmr; 111 struct sctp_inpcb *inp; /* current endpoint */ 112 struct sctp_tcb *stcb; /* current* assoc */ 113 asoc_func function_assoc; /* per assoc function */ 114 inp_func function_inp; /* per endpoint function */ 115 inp_func function_inp_end; /* end INP function */ 116 end_func function_atend;/* iterator completion function */ 117 void *pointer; /* pointer for apply func to use */ 118 uint32_t val; /* value for apply func to use */ 119 uint32_t pcb_flags; /* endpoint flags being checked */ 120 uint32_t pcb_features; /* endpoint features being checked */ 121 uint32_t asoc_state; /* assoc state being checked */ 122 uint32_t iterator_flags; 123 uint8_t no_chunk_output; 124 uint8_t done_current_ep; 125 }; 126 127 /* iterator_flags values */ 128 #define SCTP_ITERATOR_DO_ALL_INP 0x00000001 129 #define SCTP_ITERATOR_DO_SINGLE_INP 0x00000002 130 131 TAILQ_HEAD(sctpiterators, sctp_iterator); 132 133 struct sctp_copy_all { 134 struct sctp_inpcb *inp; /* ep */ 135 struct mbuf *m; 136 struct sctp_sndrcvinfo sndrcv; 137 int sndlen; 138 int cnt_sent; 139 int cnt_failed; 140 }; 141 142 struct sctp_asconf_iterator { 143 struct sctpladdr list_of_work; 144 int cnt; 145 }; 146 147 struct sctp_net_route { 148 sctp_rtentry_t *ro_rt; 149 union sctp_sockstore _l_addr; /* remote peer addr */ 150 struct sctp_ifa *_s_addr; /* our selected src addr */ 151 }; 152 153 struct htcp { 154 uint16_t alpha; /* Fixed point arith, << 7 */ 155 uint8_t beta; /* Fixed point arith, << 7 */ 156 uint8_t modeswitch; /* Delay modeswitch until we had at least one 157 * congestion event */ 158 uint32_t last_cong; /* Time since last congestion event end */ 159 uint32_t undo_last_cong; 160 uint16_t bytes_acked; 161 uint32_t bytecount; 162 uint32_t minRTT; 163 uint32_t maxRTT; 164 165 uint32_t undo_maxRTT; 166 uint32_t undo_old_maxB; 167 168 /* Bandwidth estimation */ 169 uint32_t minB; 170 uint32_t maxB; 171 uint32_t old_maxB; 172 uint32_t Bi; 173 uint32_t lasttime; 174 }; 175 176 177 struct sctp_nets { 178 TAILQ_ENTRY(sctp_nets) sctp_next; /* next link */ 179 180 /* 181 * Things on the top half may be able to be split into a common 182 * structure shared by all. 183 */ 184 struct sctp_timer pmtu_timer; 185 186 /* 187 * The following two in combination equate to a route entry for v6 188 * or v4. 189 */ 190 struct sctp_net_route ro; 191 192 /* mtu discovered so far */ 193 uint32_t mtu; 194 uint32_t ssthresh; /* not sure about this one for split */ 195 196 /* smoothed average things for RTT and RTO itself */ 197 int lastsa; 198 int lastsv; 199 unsigned int RTO; 200 201 /* This is used for SHUTDOWN/SHUTDOWN-ACK/SEND or INIT timers */ 202 struct sctp_timer rxt_timer; 203 struct sctp_timer fr_timer; /* for early fr */ 204 205 /* last time in seconds I sent to it */ 206 struct timeval last_sent_time; 207 int ref_count; 208 209 /* Congestion stats per destination */ 210 /* 211 * flight size variables and such, sorry Vern, I could not avoid 212 * this if I wanted performance :> 213 */ 214 uint32_t flight_size; 215 uint32_t cwnd; /* actual cwnd */ 216 uint32_t prev_cwnd; /* cwnd before any processing */ 217 uint32_t partial_bytes_acked; /* in CA tracks when to incr a MTU */ 218 uint32_t prev_rtt; 219 /* tracking variables to avoid the aloc/free in sack processing */ 220 unsigned int net_ack; 221 unsigned int net_ack2; 222 223 /* 224 * JRS - 5/8/07 - Variable to track last time a destination was 225 * active for CMT PF 226 */ 227 uint32_t last_active; 228 229 /* 230 * CMT variables (iyengar@cis.udel.edu) 231 */ 232 uint32_t this_sack_highest_newack; /* tracks highest TSN newly 233 * acked for a given dest in 234 * the current SACK. Used in 235 * SFR and HTNA algos */ 236 uint32_t pseudo_cumack; /* CMT CUC algorithm. Maintains next expected 237 * pseudo-cumack for this destination */ 238 uint32_t rtx_pseudo_cumack; /* CMT CUC algorithm. Maintains next 239 * expected pseudo-cumack for this 240 * destination */ 241 242 /* CMT fast recovery variables */ 243 uint32_t fast_recovery_tsn; 244 uint32_t heartbeat_random1; 245 uint32_t heartbeat_random2; 246 uint32_t tos_flowlabel; 247 248 struct timeval start_time; /* time when this net was created */ 249 250 uint32_t marked_retrans;/* number or DATA chunks marked for timer 251 * based retransmissions */ 252 uint32_t marked_fastretrans; 253 254 /* if this guy is ok or not ... status */ 255 uint16_t dest_state; 256 /* number of transmit failures to down this guy */ 257 uint16_t failure_threshold; 258 /* error stats on destination */ 259 uint16_t error_count; 260 261 uint8_t fast_retran_loss_recovery; 262 uint8_t will_exit_fast_recovery; 263 /* Flags that probably can be combined into dest_state */ 264 uint8_t fast_retran_ip; /* fast retransmit in progress */ 265 uint8_t hb_responded; 266 uint8_t saw_newack; /* CMT's SFR algorithm flag */ 267 uint8_t src_addr_selected; /* if we split we move */ 268 uint8_t indx_of_eligible_next_to_use; 269 uint8_t addr_is_local; /* its a local address (if known) could move 270 * in split */ 271 272 /* 273 * CMT variables (iyengar@cis.udel.edu) 274 */ 275 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to 276 * find a new pseudocumack. This flag 277 * is set after a new pseudo-cumack 278 * has been received and indicates 279 * that the sender should find the 280 * next pseudo-cumack expected for 281 * this destination */ 282 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to 283 * find a new rtx-pseudocumack. This 284 * flag is set after a new 285 * rtx-pseudo-cumack has been received 286 * and indicates that the sender 287 * should find the next 288 * rtx-pseudo-cumack expected for this 289 * destination */ 290 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to 291 * indicate if a new pseudo-cumack or 292 * rtx-pseudo-cumack has been received */ 293 uint8_t window_probe; /* Doing a window probe? */ 294 uint8_t RTO_measured; /* Have we done the first measure */ 295 uint8_t last_hs_used; /* index into the last HS table entry we used */ 296 /* JRS - struct used in HTCP algorithm */ 297 struct htcp htcp_ca; 298 }; 299 300 301 struct sctp_data_chunkrec { 302 uint32_t TSN_seq; /* the TSN of this transmit */ 303 uint16_t stream_seq; /* the stream sequence number of this transmit */ 304 uint16_t stream_number; /* the stream number of this guy */ 305 uint32_t payloadtype; 306 uint32_t context; /* from send */ 307 308 /* ECN Nonce: Nonce Value for this chunk */ 309 uint8_t ect_nonce; 310 311 /* 312 * part of the Highest sacked algorithm to be able to stroke counts 313 * on ones that are FR'd. 314 */ 315 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 316 struct timeval timetodrop; /* time we drop it from queue */ 317 uint8_t doing_fast_retransmit; 318 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 319 * outbound holds sending flags for PR-SCTP. */ 320 uint8_t state_flags; 321 uint8_t chunk_was_revoked; 322 }; 323 324 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 325 326 /* The lower byte is used to enumerate PR_SCTP policies */ 327 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 328 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 329 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 330 331 /* The upper byte is used a a bit mask */ 332 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100 333 334 struct chk_id { 335 uint16_t id; 336 uint16_t can_take_data; 337 }; 338 339 340 struct sctp_tmit_chunk { 341 union { 342 struct sctp_data_chunkrec data; 343 struct chk_id chunk_id; 344 } rec; 345 struct sctp_association *asoc; /* bp to asoc this belongs to */ 346 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 347 struct mbuf *data; /* pointer to mbuf chain of data */ 348 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 349 struct sctp_nets *whoTo; 350 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 351 int32_t sent; /* the send status */ 352 uint16_t snd_count; /* number of times I sent */ 353 uint16_t flags; /* flags, such as FRAGMENT_OK */ 354 uint16_t send_size; 355 uint16_t book_size; 356 uint16_t mbcnt; 357 uint8_t pad_inplace; 358 uint8_t do_rtt; 359 uint8_t book_size_scale; 360 uint8_t addr_over; /* flag which is set if the dest address for 361 * this chunk is overridden by user. Used for 362 * CMT (iyengar@cis.udel.edu, 2005/06/21) */ 363 uint8_t no_fr_allowed; 364 uint8_t pr_sctp_on; 365 uint8_t copy_by_ref; 366 uint8_t window_probe; 367 }; 368 369 /* 370 * The first part of this structure MUST be the entire sinfo structure. Maybe 371 * I should have made it a sub structure... we can circle back later and do 372 * that if we want. 373 */ 374 struct sctp_queued_to_read { /* sinfo structure Pluse more */ 375 uint16_t sinfo_stream; /* off the wire */ 376 uint16_t sinfo_ssn; /* off the wire */ 377 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for 378 * EOR */ 379 uint32_t sinfo_ppid; /* off the wire */ 380 uint32_t sinfo_context; /* pick this up from assoc def context? */ 381 uint32_t sinfo_timetolive; /* not used by kernel */ 382 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */ 383 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */ 384 sctp_assoc_t sinfo_assoc_id; /* our assoc id */ 385 /* Non sinfo stuff */ 386 uint32_t length; /* length of data */ 387 uint32_t held_length; /* length held in sb */ 388 struct sctp_nets *whoFrom; /* where it came from */ 389 struct mbuf *data; /* front of the mbuf chain of data with 390 * PKT_HDR */ 391 struct mbuf *tail_mbuf; /* used for multi-part data */ 392 struct mbuf *aux_data; /* used to hold/cache control if o/s does not 393 * take it from us */ 394 struct sctp_tcb *stcb; /* assoc, used for window update */ 395 TAILQ_ENTRY(sctp_queued_to_read) next; 396 uint16_t port_from; 397 uint16_t spec_flags; /* Flags to hold the notification field */ 398 uint8_t do_not_ref_stcb; 399 uint8_t end_added; 400 uint8_t pdapi_aborted; 401 uint8_t some_taken; 402 }; 403 404 /* This data structure will be on the outbound 405 * stream queues. Data will be pulled off from 406 * the front of the mbuf data and chunk-ified 407 * by the output routines. We will custom 408 * fit every chunk we pull to the send/sent 409 * queue to make up the next full packet 410 * if we can. An entry cannot be removed 411 * from the stream_out queue until 412 * the msg_is_complete flag is set. This 413 * means at times data/tail_mbuf MIGHT 414 * be NULL.. If that occurs it happens 415 * for one of two reasons. Either the user 416 * is blocked on a send() call and has not 417 * awoken to copy more data down... OR 418 * the user is in the explict MSG_EOR mode 419 * and wrote some data, but has not completed 420 * sending. 421 */ 422 struct sctp_stream_queue_pending { 423 struct mbuf *data; 424 struct mbuf *tail_mbuf; 425 struct timeval ts; 426 struct sctp_nets *net; 427 TAILQ_ENTRY(sctp_stream_queue_pending) next; 428 uint32_t length; 429 uint32_t timetolive; 430 uint32_t ppid; 431 uint32_t context; 432 uint16_t sinfo_flags; 433 uint16_t stream; 434 uint16_t strseq; 435 uint16_t act_flags; 436 uint8_t msg_is_complete; 437 uint8_t some_taken; 438 uint8_t addr_over; 439 uint8_t pr_sctp_on; 440 uint8_t sender_all_done; 441 uint8_t put_last_out; 442 }; 443 444 /* 445 * this struct contains info that is used to track inbound stream data and 446 * help with ordering. 447 */ 448 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 449 struct sctp_stream_in { 450 struct sctp_readhead inqueue; 451 uint16_t stream_no; 452 uint16_t last_sequence_delivered; /* used for re-order */ 453 uint8_t delivery_started; 454 }; 455 456 /* This struct is used to track the traffic on outbound streams */ 457 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 458 struct sctp_stream_out { 459 struct sctp_streamhead outqueue; 460 TAILQ_ENTRY(sctp_stream_out) next_spoke; /* next link in wheel */ 461 uint16_t stream_no; 462 uint16_t next_sequence_sent; /* next one I expect to send out */ 463 uint8_t last_msg_incomplete; 464 }; 465 466 /* used to keep track of the addresses yet to try to add/delete */ 467 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 468 struct sctp_asconf_addr { 469 TAILQ_ENTRY(sctp_asconf_addr) next; 470 struct sctp_asconf_addr_param ap; 471 struct sctp_ifa *ifa; /* save the ifa for add/del ip */ 472 uint8_t sent; /* has this been sent yet? */ 473 }; 474 475 struct sctp_scoping { 476 uint8_t ipv4_addr_legal; 477 uint8_t ipv6_addr_legal; 478 uint8_t loopback_scope; 479 uint8_t ipv4_local_scope; 480 uint8_t local_scope; 481 uint8_t site_scope; 482 }; 483 484 #define SCTP_TSN_LOG_SIZE 40 485 486 struct sctp_tsn_log { 487 void *stcb; 488 uint32_t tsn; 489 uint16_t strm; 490 uint16_t seq; 491 uint16_t sz; 492 uint16_t flgs; 493 uint16_t in_pos; 494 uint16_t in_out; 495 }; 496 497 #define SCTP_FS_SPEC_LOG_SIZE 200 498 struct sctp_fs_spec_log { 499 uint32_t sent; 500 uint32_t total_flight; 501 uint32_t tsn; 502 uint16_t book; 503 uint8_t incr; 504 uint8_t decr; 505 }; 506 507 /* This struct is here to cut out the compatiabilty 508 * pad that bulks up both the inp and stcb. The non 509 * pad portion MUST stay in complete sync with 510 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added 511 * this must be done here too. 512 */ 513 struct sctp_nonpad_sndrcvinfo { 514 uint16_t sinfo_stream; 515 uint16_t sinfo_ssn; 516 uint16_t sinfo_flags; 517 uint32_t sinfo_ppid; 518 uint32_t sinfo_context; 519 uint32_t sinfo_timetolive; 520 uint32_t sinfo_tsn; 521 uint32_t sinfo_cumtsn; 522 sctp_assoc_t sinfo_assoc_id; 523 }; 524 525 /* 526 * JRS - Structure to hold function pointers to the functions responsible 527 * for congestion control. 528 */ 529 530 struct sctp_cc_functions { 531 void (*sctp_set_initial_cc_param) (struct sctp_tcb *stcb, struct sctp_nets *net); 532 void (*sctp_cwnd_update_after_sack) (struct sctp_tcb *stcb, 533 struct sctp_association *asoc, 534 int accum_moved, int reneged_all, int will_exit); 535 void (*sctp_cwnd_update_after_fr) (struct sctp_tcb *stcb, 536 struct sctp_association *asoc); 537 void (*sctp_cwnd_update_after_timeout) (struct sctp_tcb *stcb, 538 struct sctp_nets *net); 539 void (*sctp_cwnd_update_after_ecn_echo) (struct sctp_tcb *stcb, 540 struct sctp_nets *net); 541 void (*sctp_cwnd_update_after_packet_dropped) (struct sctp_tcb *stcb, 542 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp, 543 uint32_t * bottle_bw, uint32_t * on_queue); 544 void (*sctp_cwnd_update_after_output) (struct sctp_tcb *stcb, 545 struct sctp_nets *net, int burst_limit); 546 void (*sctp_cwnd_update_after_fr_timer) (struct sctp_inpcb *inp, 547 struct sctp_tcb *stcb, struct sctp_nets *net); 548 }; 549 550 /* 551 * Here we have information about each individual association that we track. 552 * We probably in production would be more dynamic. But for ease of 553 * implementation we will have a fixed array that we hunt for in a linear 554 * fashion. 555 */ 556 struct sctp_association { 557 /* association state */ 558 int state; 559 /* queue of pending addrs to add/delete */ 560 struct sctp_asconf_addrhead asconf_queue; 561 struct timeval time_entered; /* time we entered state */ 562 struct timeval time_last_rcvd; 563 struct timeval time_last_sent; 564 struct timeval time_last_sat_advance; 565 struct sctp_nonpad_sndrcvinfo def_send; 566 567 /* timers and such */ 568 struct sctp_timer hb_timer; /* hb timer */ 569 struct sctp_timer dack_timer; /* Delayed ack timer */ 570 struct sctp_timer asconf_timer; /* Asconf */ 571 struct sctp_timer strreset_timer; /* stream reset */ 572 struct sctp_timer shut_guard_timer; /* guard */ 573 struct sctp_timer autoclose_timer; /* automatic close timer */ 574 struct sctp_timer delayed_event_timer; /* timer for delayed events */ 575 576 /* list of local addresses when add/del in progress */ 577 struct sctpladdr sctp_restricted_addrs; 578 579 struct sctpnetlisthead nets; 580 581 /* Free chunk list */ 582 struct sctpchunk_listhead free_chunks; 583 584 585 /* Control chunk queue */ 586 struct sctpchunk_listhead control_send_queue; 587 588 /* 589 * Once a TSN hits the wire it is moved to the sent_queue. We 590 * maintain two counts here (don't know if any but retran_cnt is 591 * needed). The idea is that the sent_queue_retran_cnt reflects how 592 * many chunks have been marked for retranmission by either T3-rxt 593 * or FR. 594 */ 595 struct sctpchunk_listhead sent_queue; 596 struct sctpchunk_listhead send_queue; 597 598 599 /* re-assembly queue for fragmented chunks on the inbound path */ 600 struct sctpchunk_listhead reasmqueue; 601 602 /* 603 * this queue is used when we reach a condition that we can NOT put 604 * data into the socket buffer. We track the size of this queue and 605 * set our rwnd to the space in the socket minus also the 606 * size_on_delivery_queue. 607 */ 608 struct sctpwheel_listhead out_wheel; 609 610 /* 611 * This pointer will be set to NULL most of the time. But when we 612 * have a fragmented message, where we could not get out all of the 613 * message at the last send then this will point to the stream to go 614 * get data from. 615 */ 616 struct sctp_stream_out *locked_on_sending; 617 618 /* If an iterator is looking at me, this is it */ 619 struct sctp_iterator *stcb_starting_point_for_iterator; 620 621 /* ASCONF destination address last sent to */ 622 /* struct sctp_nets *asconf_last_sent_to;*/ 623 /* Peter, greppign for the above shows only on strange set 624 * I don't think we need it so I have commented it out. 625 */ 626 627 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 628 struct mbuf *last_asconf_ack_sent; 629 630 /* 631 * pointer to last stream reset queued to control queue by us with 632 * requests. 633 */ 634 struct sctp_tmit_chunk *str_reset; 635 /* 636 * if Source Address Selection happening, this will rotate through 637 * the link list. 638 */ 639 struct sctp_laddr *last_used_address; 640 641 /* stream arrays */ 642 struct sctp_stream_in *strmin; 643 struct sctp_stream_out *strmout; 644 uint8_t *mapping_array; 645 /* primary destination to use */ 646 struct sctp_nets *primary_destination; 647 /* For CMT */ 648 struct sctp_nets *last_net_data_came_from; 649 /* last place I got a data chunk from */ 650 struct sctp_nets *last_data_chunk_from; 651 /* last place I got a control from */ 652 struct sctp_nets *last_control_chunk_from; 653 654 /* circular looking for output selection */ 655 struct sctp_stream_out *last_out_stream; 656 657 /* 658 * wait to the point the cum-ack passes req->send_reset_at_tsn for 659 * any req on the list. 660 */ 661 struct sctp_resethead resetHead; 662 663 /* queue of chunks waiting to be sent into the local stack */ 664 struct sctp_readhead pending_reply_queue; 665 666 /* JRS - the congestion control functions are in this struct */ 667 struct sctp_cc_functions cc_functions; 668 /* 669 * JRS - value to store the currently loaded congestion control 670 * module 671 */ 672 uint32_t congestion_control_module; 673 674 uint32_t vrf_id; 675 676 uint32_t cookie_preserve_req; 677 /* ASCONF next seq I am sending out, inits at init-tsn */ 678 uint32_t asconf_seq_out; 679 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 680 uint32_t asconf_seq_in; 681 682 /* next seq I am sending in str reset messages */ 683 uint32_t str_reset_seq_out; 684 /* next seq I am expecting in str reset messages */ 685 uint32_t str_reset_seq_in; 686 687 /* various verification tag information */ 688 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 689 * by remote end, and I have unlocked this 690 * will be regenerated to a new random value. */ 691 uint32_t peer_vtag; /* The peers last tag */ 692 693 uint32_t my_vtag_nonce; 694 uint32_t peer_vtag_nonce; 695 696 uint32_t assoc_id; 697 698 /* This is the SCTP fragmentation threshold */ 699 uint32_t smallest_mtu; 700 701 /* 702 * Special hook for Fast retransmit, allows us to track the highest 703 * TSN that is NEW in this SACK if gap ack blocks are present. 704 */ 705 uint32_t this_sack_highest_gap; 706 707 /* 708 * The highest consecutive TSN that has been acked by peer on my 709 * sends 710 */ 711 uint32_t last_acked_seq; 712 713 /* The next TSN that I will use in sending. */ 714 uint32_t sending_seq; 715 716 /* Original seq number I used ??questionable to keep?? */ 717 uint32_t init_seq_number; 718 719 720 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 721 /* (A1 in Section 4.2) */ 722 uint32_t advanced_peer_ack_point; 723 724 /* 725 * The highest consequetive TSN at the bottom of the mapping array 726 * (for his sends). 727 */ 728 uint32_t cumulative_tsn; 729 /* 730 * Used to track the mapping array and its offset bits. This MAY be 731 * lower then cumulative_tsn. 732 */ 733 uint32_t mapping_array_base_tsn; 734 /* 735 * used to track highest TSN we have received and is listed in the 736 * mapping array. 737 */ 738 uint32_t highest_tsn_inside_map; 739 740 uint32_t last_echo_tsn; 741 uint32_t last_cwr_tsn; 742 uint32_t fast_recovery_tsn; 743 uint32_t sat_t3_recovery_tsn; 744 uint32_t tsn_last_delivered; 745 /* 746 * For the pd-api we should re-write this a bit more efficent. We 747 * could have multiple sctp_queued_to_read's that we are building at 748 * once. Now we only do this when we get ready to deliver to the 749 * socket buffer. Note that we depend on the fact that the struct is 750 * "stuck" on the read queue until we finish all the pd-api. 751 */ 752 struct sctp_queued_to_read *control_pdapi; 753 754 uint32_t tsn_of_pdapi_last_delivered; 755 uint32_t pdapi_ppid; 756 uint32_t context; 757 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 758 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 759 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 760 #ifdef SCTP_ASOCLOG_OF_TSNS 761 /* 762 * special log - This adds considerable size to the asoc, but 763 * provides a log that you can use to detect problems via kgdb. 764 */ 765 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE]; 766 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE]; 767 uint32_t cumack_log[SCTP_TSN_LOG_SIZE]; 768 uint16_t tsn_in_at; 769 uint16_t tsn_out_at; 770 uint16_t tsn_in_wrapped; 771 uint16_t tsn_out_wrapped; 772 uint16_t cumack_log_at; 773 774 #endif /* SCTP_ASOCLOG_OF_TSNS */ 775 #ifdef SCTP_FS_SPEC_LOG 776 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE]; 777 uint16_t fs_index; 778 #endif 779 780 /* 781 * window state information and smallest MTU that I use to bound 782 * segmentation 783 */ 784 uint32_t peers_rwnd; 785 uint32_t my_rwnd; 786 uint32_t my_last_reported_rwnd; 787 uint32_t my_rwnd_control_len; 788 uint32_t sctp_frag_point; 789 790 uint32_t total_output_queue_size; 791 792 uint32_t sb_cc; /* shadow of sb_cc in one-2-one */ 793 uint32_t sb_mbcnt; /* shadow of sb_mbcnt in one-2-one */ 794 /* 32 bit nonce stuff */ 795 uint32_t nonce_resync_tsn; 796 uint32_t nonce_wait_tsn; 797 uint32_t default_flowlabel; 798 uint32_t pr_sctp_cnt; 799 int ctrl_queue_cnt; /* could be removed REM */ 800 /* 801 * All outbound datagrams queue into this list from the individual 802 * stream queue. Here they get assigned a TSN and then await 803 * sending. The stream seq comes when it is first put in the 804 * individual str queue 805 */ 806 unsigned int stream_queue_cnt; 807 unsigned int send_queue_cnt; 808 unsigned int sent_queue_cnt; 809 unsigned int sent_queue_cnt_removeable; 810 /* 811 * Number on sent queue that are marked for retran until this value 812 * is 0 we only send one packet of retran'ed data. 813 */ 814 unsigned int sent_queue_retran_cnt; 815 816 unsigned int size_on_reasm_queue; 817 unsigned int cnt_on_reasm_queue; 818 /* amount of data (bytes) currently in flight (on all destinations) */ 819 unsigned int total_flight; 820 /* Total book size in flight */ 821 unsigned int total_flight_count; /* count of chunks used with 822 * book total */ 823 /* count of destinaton nets and list of destination nets */ 824 unsigned int numnets; 825 826 /* Total error count on this association */ 827 unsigned int overall_error_count; 828 829 unsigned int cnt_msg_on_sb; 830 831 /* All stream count of chunks for delivery */ 832 unsigned int size_on_all_streams; 833 unsigned int cnt_on_all_streams; 834 835 /* Heart Beat delay in ticks */ 836 unsigned int heart_beat_delay; 837 838 /* autoclose */ 839 unsigned int sctp_autoclose_ticks; 840 841 /* how many preopen streams we have */ 842 unsigned int pre_open_streams; 843 844 /* How many streams I support coming into me */ 845 unsigned int max_inbound_streams; 846 847 /* the cookie life I award for any cookie, in seconds */ 848 unsigned int cookie_life; 849 /* time to delay acks for */ 850 unsigned int delayed_ack; 851 unsigned int old_delayed_ack; 852 unsigned int sack_freq; 853 unsigned int data_pkts_seen; 854 855 unsigned int numduptsns; 856 int dup_tsns[SCTP_MAX_DUP_TSNS]; 857 unsigned int initial_init_rto_max; /* initial RTO for INIT's */ 858 unsigned int initial_rto; /* initial send RTO */ 859 unsigned int minrto; /* per assoc RTO-MIN */ 860 unsigned int maxrto; /* per assoc RTO-MAX */ 861 862 /* authentication fields */ 863 sctp_auth_chklist_t *local_auth_chunks; 864 sctp_auth_chklist_t *peer_auth_chunks; 865 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 866 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 867 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 868 sctp_authinfo_t authinfo; /* randoms, cached keys */ 869 /* 870 * refcnt to block freeing when a sender or receiver is off coping 871 * user data in. 872 */ 873 uint32_t refcnt; 874 uint32_t chunks_on_out_queue; /* total chunks floating around, 875 * locked by send socket buffer */ 876 877 uint16_t peer_hmac_id; /* peer HMAC id to send */ 878 879 /* 880 * Being that we have no bag to collect stale cookies, and that we 881 * really would not want to anyway.. we will count them in this 882 * counter. We of course feed them to the pigeons right away (I have 883 * always thought of pigeons as flying rats). 884 */ 885 uint16_t stale_cookie_count; 886 887 /* 888 * For the partial delivery API, if up, invoked this is what last 889 * TSN I delivered 890 */ 891 uint16_t str_of_pdapi; 892 uint16_t ssn_of_pdapi; 893 894 /* counts of actual built streams. Allocation may be more however */ 895 /* could re-arrange to optimize space here. */ 896 uint16_t streamincnt; 897 uint16_t streamoutcnt; 898 899 /* my maximum number of retrans of INIT and SEND */ 900 /* copied from SCTP but should be individually setable */ 901 uint16_t max_init_times; 902 uint16_t max_send_times; 903 904 uint16_t def_net_failure; 905 906 /* 907 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 908 * awaiting ACK 909 */ 910 uint16_t asconf_sent; /* possibly removable REM */ 911 uint16_t mapping_array_size; 912 913 uint16_t last_strm_seq_delivered; 914 uint16_t last_strm_no_delivered; 915 916 uint16_t last_revoke_count; 917 int16_t num_send_timers_up; 918 919 uint16_t stream_locked_on; 920 uint16_t ecn_echo_cnt_onq; 921 922 uint16_t free_chunk_cnt; 923 924 uint8_t stream_locked; 925 uint8_t authenticated; /* packet authenticated ok */ 926 /* 927 * This flag indicates that a SACK need to be sent. Initially this 928 * is 1 to send the first sACK immediately. 929 */ 930 uint8_t send_sack; 931 932 /* max burst after fast retransmit completes */ 933 uint8_t max_burst; 934 935 uint8_t sat_network; /* RTT is in range of sat net or greater */ 936 uint8_t sat_network_lockout; /* lockout code */ 937 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 938 /* flag goes on when we are doing a partial delivery api */ 939 uint8_t hb_random_values[4]; 940 uint8_t fragmented_delivery_inprogress; 941 uint8_t fragment_flags; 942 uint8_t last_flags_delivered; 943 uint8_t hb_ect_randombit; 944 uint8_t hb_random_idx; 945 uint8_t hb_is_disabled; /* is the hb disabled? */ 946 uint8_t default_tos; 947 948 /* ECN Nonce stuff */ 949 uint8_t receiver_nonce_sum; /* nonce I sum and put in my sack */ 950 uint8_t ecn_nonce_allowed; /* Tells us if ECN nonce is on */ 951 uint8_t nonce_sum_check;/* On off switch used during re-sync */ 952 uint8_t nonce_wait_for_ecne; /* flag when we expect a ECN */ 953 uint8_t peer_supports_ecn_nonce; 954 955 /* 956 * This value, plus all other ack'd but above cum-ack is added 957 * together to cross check against the bit that we have yet to 958 * define (probably in the SACK). When the cum-ack is updated, this 959 * sum is updated as well. 960 */ 961 uint8_t nonce_sum_expect_base; 962 /* Flag to tell if ECN is allowed */ 963 uint8_t ecn_allowed; 964 965 /* flag to indicate if peer can do asconf */ 966 uint8_t peer_supports_asconf; 967 /* pr-sctp support flag */ 968 uint8_t peer_supports_prsctp; 969 /* peer authentication support flag */ 970 uint8_t peer_supports_auth; 971 /* stream resets are supported by the peer */ 972 uint8_t peer_supports_strreset; 973 974 /* 975 * packet drop's are supported by the peer, we don't really care 976 * about this but we bookkeep it anyway. 977 */ 978 uint8_t peer_supports_pktdrop; 979 980 /* Do we allow V6/V4? */ 981 uint8_t ipv4_addr_legal; 982 uint8_t ipv6_addr_legal; 983 /* Address scoping flags */ 984 /* scope value for IPv4 */ 985 uint8_t ipv4_local_scope; 986 /* scope values for IPv6 */ 987 uint8_t local_scope; 988 uint8_t site_scope; 989 /* loopback scope */ 990 uint8_t loopback_scope; 991 /* flags to handle send alternate net tracking */ 992 uint8_t used_alt_onsack; 993 uint8_t used_alt_asconfack; 994 uint8_t fast_retran_loss_recovery; 995 uint8_t sat_t3_loss_recovery; 996 uint8_t dropped_special_cnt; 997 uint8_t seen_a_sack_this_pkt; 998 uint8_t stream_reset_outstanding; 999 uint8_t stream_reset_out_is_outstanding; 1000 uint8_t delayed_connection; 1001 uint8_t ifp_had_enobuf; 1002 uint8_t saw_sack_with_frags; 1003 uint8_t in_restart_hash; 1004 uint8_t assoc_up_sent; 1005 /* CMT variables */ 1006 uint8_t cmt_dac_pkts_rcvd; 1007 uint8_t sctp_cmt_on_off; 1008 uint8_t iam_blocking; 1009 uint8_t cookie_how[8]; 1010 /* JRS 5/21/07 - CMT PF variable */ 1011 uint8_t sctp_cmt_pf; 1012 /* 1013 * The mapping array is used to track out of order sequences above 1014 * last_acked_seq. 0 indicates packet missing 1 indicates packet 1015 * rec'd. We slide it up every time we raise last_acked_seq and 0 1016 * trailing locactions out. If I get a TSN above the array 1017 * mappingArraySz, I discard the datagram and let retransmit happen. 1018 */ 1019 uint32_t marked_retrans; 1020 uint32_t timoinit; 1021 uint32_t timodata; 1022 uint32_t timosack; 1023 uint32_t timoshutdown; 1024 uint32_t timoheartbeat; 1025 uint32_t timocookie; 1026 uint32_t timoshutdownack; 1027 struct timeval start_time; 1028 struct timeval discontinuity_time; 1029 }; 1030 1031 #endif 1032