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 /* UDP port number in case of UDP tunneling */ 261 uint16_t port; 262 263 uint8_t fast_retran_loss_recovery; 264 uint8_t will_exit_fast_recovery; 265 /* Flags that probably can be combined into dest_state */ 266 uint8_t fast_retran_ip; /* fast retransmit in progress */ 267 uint8_t hb_responded; 268 uint8_t saw_newack; /* CMT's SFR algorithm flag */ 269 uint8_t src_addr_selected; /* if we split we move */ 270 uint8_t indx_of_eligible_next_to_use; 271 uint8_t addr_is_local; /* its a local address (if known) could move 272 * in split */ 273 274 /* 275 * CMT variables (iyengar@cis.udel.edu) 276 */ 277 uint8_t find_pseudo_cumack; /* CMT CUC algorithm. Flag used to 278 * find a new pseudocumack. This flag 279 * is set after a new pseudo-cumack 280 * has been received and indicates 281 * that the sender should find the 282 * next pseudo-cumack expected for 283 * this destination */ 284 uint8_t find_rtx_pseudo_cumack; /* CMT CUCv2 algorithm. Flag used to 285 * find a new rtx-pseudocumack. This 286 * flag is set after a new 287 * rtx-pseudo-cumack has been received 288 * and indicates that the sender 289 * should find the next 290 * rtx-pseudo-cumack expected for this 291 * destination */ 292 uint8_t new_pseudo_cumack; /* CMT CUC algorithm. Flag used to 293 * indicate if a new pseudo-cumack or 294 * rtx-pseudo-cumack has been received */ 295 uint8_t window_probe; /* Doing a window probe? */ 296 uint8_t RTO_measured; /* Have we done the first measure */ 297 uint8_t last_hs_used; /* index into the last HS table entry we used */ 298 /* JRS - struct used in HTCP algorithm */ 299 struct htcp htcp_ca; 300 }; 301 302 303 struct sctp_data_chunkrec { 304 uint32_t TSN_seq; /* the TSN of this transmit */ 305 uint16_t stream_seq; /* the stream sequence number of this transmit */ 306 uint16_t stream_number; /* the stream number of this guy */ 307 uint32_t payloadtype; 308 uint32_t context; /* from send */ 309 310 /* ECN Nonce: Nonce Value for this chunk */ 311 uint8_t ect_nonce; 312 313 /* 314 * part of the Highest sacked algorithm to be able to stroke counts 315 * on ones that are FR'd. 316 */ 317 uint32_t fast_retran_tsn; /* sending_seq at the time of FR */ 318 struct timeval timetodrop; /* time we drop it from queue */ 319 uint8_t doing_fast_retransmit; 320 uint8_t rcv_flags; /* flags pulled from data chunk on inbound for 321 * outbound holds sending flags for PR-SCTP. */ 322 uint8_t state_flags; 323 uint8_t chunk_was_revoked; 324 }; 325 326 TAILQ_HEAD(sctpchunk_listhead, sctp_tmit_chunk); 327 328 /* The lower byte is used to enumerate PR_SCTP policies */ 329 #define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL 330 #define CHUNK_FLAGS_PR_SCTP_BUF SCTP_PR_SCTP_BUF 331 #define CHUNK_FLAGS_PR_SCTP_RTX SCTP_PR_SCTP_RTX 332 333 /* The upper byte is used a a bit mask */ 334 #define CHUNK_FLAGS_FRAGMENT_OK 0x0100 335 336 struct chk_id { 337 uint16_t id; 338 uint16_t can_take_data; 339 }; 340 341 342 struct sctp_tmit_chunk { 343 union { 344 struct sctp_data_chunkrec data; 345 struct chk_id chunk_id; 346 } rec; 347 struct sctp_association *asoc; /* bp to asoc this belongs to */ 348 struct timeval sent_rcv_time; /* filled in if RTT being calculated */ 349 struct mbuf *data; /* pointer to mbuf chain of data */ 350 struct mbuf *last_mbuf; /* pointer to last mbuf in chain */ 351 struct sctp_nets *whoTo; 352 TAILQ_ENTRY(sctp_tmit_chunk) sctp_next; /* next link */ 353 int32_t sent; /* the send status */ 354 uint16_t snd_count; /* number of times I sent */ 355 uint16_t flags; /* flags, such as FRAGMENT_OK */ 356 uint16_t send_size; 357 uint16_t book_size; 358 uint16_t mbcnt; 359 uint8_t pad_inplace; 360 uint8_t do_rtt; 361 uint8_t book_size_scale; 362 uint8_t addr_over; /* flag which is set if the dest address for 363 * this chunk is overridden by user. Used for 364 * CMT (iyengar@cis.udel.edu, 2005/06/21) */ 365 uint8_t no_fr_allowed; 366 uint8_t pr_sctp_on; 367 uint8_t copy_by_ref; 368 uint8_t window_probe; 369 }; 370 371 /* 372 * The first part of this structure MUST be the entire sinfo structure. Maybe 373 * I should have made it a sub structure... we can circle back later and do 374 * that if we want. 375 */ 376 struct sctp_queued_to_read { /* sinfo structure Pluse more */ 377 uint16_t sinfo_stream; /* off the wire */ 378 uint16_t sinfo_ssn; /* off the wire */ 379 uint16_t sinfo_flags; /* SCTP_UNORDERED from wire use SCTP_EOF for 380 * EOR */ 381 uint32_t sinfo_ppid; /* off the wire */ 382 uint32_t sinfo_context; /* pick this up from assoc def context? */ 383 uint32_t sinfo_timetolive; /* not used by kernel */ 384 uint32_t sinfo_tsn; /* Use this in reassembly as first TSN */ 385 uint32_t sinfo_cumtsn; /* Use this in reassembly as last TSN */ 386 sctp_assoc_t sinfo_assoc_id; /* our assoc id */ 387 /* Non sinfo stuff */ 388 uint32_t length; /* length of data */ 389 uint32_t held_length; /* length held in sb */ 390 struct sctp_nets *whoFrom; /* where it came from */ 391 struct mbuf *data; /* front of the mbuf chain of data with 392 * PKT_HDR */ 393 struct mbuf *tail_mbuf; /* used for multi-part data */ 394 struct mbuf *aux_data; /* used to hold/cache control if o/s does not 395 * take it from us */ 396 struct sctp_tcb *stcb; /* assoc, used for window update */ 397 TAILQ_ENTRY(sctp_queued_to_read) next; 398 uint16_t port_from; 399 uint16_t spec_flags; /* Flags to hold the notification field */ 400 uint8_t do_not_ref_stcb; 401 uint8_t end_added; 402 uint8_t pdapi_aborted; 403 uint8_t some_taken; 404 }; 405 406 /* This data structure will be on the outbound 407 * stream queues. Data will be pulled off from 408 * the front of the mbuf data and chunk-ified 409 * by the output routines. We will custom 410 * fit every chunk we pull to the send/sent 411 * queue to make up the next full packet 412 * if we can. An entry cannot be removed 413 * from the stream_out queue until 414 * the msg_is_complete flag is set. This 415 * means at times data/tail_mbuf MIGHT 416 * be NULL.. If that occurs it happens 417 * for one of two reasons. Either the user 418 * is blocked on a send() call and has not 419 * awoken to copy more data down... OR 420 * the user is in the explict MSG_EOR mode 421 * and wrote some data, but has not completed 422 * sending. 423 */ 424 struct sctp_stream_queue_pending { 425 struct mbuf *data; 426 struct mbuf *tail_mbuf; 427 struct timeval ts; 428 struct sctp_nets *net; 429 TAILQ_ENTRY(sctp_stream_queue_pending) next; 430 uint32_t length; 431 uint32_t timetolive; 432 uint32_t ppid; 433 uint32_t context; 434 uint16_t sinfo_flags; 435 uint16_t stream; 436 uint16_t strseq; 437 uint16_t act_flags; 438 uint8_t msg_is_complete; 439 uint8_t some_taken; 440 uint8_t addr_over; 441 uint8_t pr_sctp_on; 442 uint8_t sender_all_done; 443 uint8_t put_last_out; 444 }; 445 446 /* 447 * this struct contains info that is used to track inbound stream data and 448 * help with ordering. 449 */ 450 TAILQ_HEAD(sctpwheelunrel_listhead, sctp_stream_in); 451 struct sctp_stream_in { 452 struct sctp_readhead inqueue; 453 uint16_t stream_no; 454 uint16_t last_sequence_delivered; /* used for re-order */ 455 uint8_t delivery_started; 456 }; 457 458 /* This struct is used to track the traffic on outbound streams */ 459 TAILQ_HEAD(sctpwheel_listhead, sctp_stream_out); 460 struct sctp_stream_out { 461 struct sctp_streamhead outqueue; 462 TAILQ_ENTRY(sctp_stream_out) next_spoke; /* next link in wheel */ 463 uint16_t stream_no; 464 uint16_t next_sequence_sent; /* next one I expect to send out */ 465 uint8_t last_msg_incomplete; 466 }; 467 468 /* used to keep track of the addresses yet to try to add/delete */ 469 TAILQ_HEAD(sctp_asconf_addrhead, sctp_asconf_addr); 470 struct sctp_asconf_addr { 471 TAILQ_ENTRY(sctp_asconf_addr) next; 472 struct sctp_asconf_addr_param ap; 473 struct sctp_ifa *ifa; /* save the ifa for add/del ip */ 474 uint8_t sent; /* has this been sent yet? */ 475 }; 476 477 struct sctp_scoping { 478 uint8_t ipv4_addr_legal; 479 uint8_t ipv6_addr_legal; 480 uint8_t loopback_scope; 481 uint8_t ipv4_local_scope; 482 uint8_t local_scope; 483 uint8_t site_scope; 484 }; 485 486 #define SCTP_TSN_LOG_SIZE 40 487 488 struct sctp_tsn_log { 489 void *stcb; 490 uint32_t tsn; 491 uint16_t strm; 492 uint16_t seq; 493 uint16_t sz; 494 uint16_t flgs; 495 uint16_t in_pos; 496 uint16_t in_out; 497 }; 498 499 #define SCTP_FS_SPEC_LOG_SIZE 200 500 struct sctp_fs_spec_log { 501 uint32_t sent; 502 uint32_t total_flight; 503 uint32_t tsn; 504 uint16_t book; 505 uint8_t incr; 506 uint8_t decr; 507 }; 508 509 /* This struct is here to cut out the compatiabilty 510 * pad that bulks up both the inp and stcb. The non 511 * pad portion MUST stay in complete sync with 512 * sctp_sndrcvinfo... i.e. if sinfo_xxxx is added 513 * this must be done here too. 514 */ 515 struct sctp_nonpad_sndrcvinfo { 516 uint16_t sinfo_stream; 517 uint16_t sinfo_ssn; 518 uint16_t sinfo_flags; 519 uint32_t sinfo_ppid; 520 uint32_t sinfo_context; 521 uint32_t sinfo_timetolive; 522 uint32_t sinfo_tsn; 523 uint32_t sinfo_cumtsn; 524 sctp_assoc_t sinfo_assoc_id; 525 }; 526 527 /* 528 * JRS - Structure to hold function pointers to the functions responsible 529 * for congestion control. 530 */ 531 532 struct sctp_cc_functions { 533 void (*sctp_set_initial_cc_param) (struct sctp_tcb *stcb, struct sctp_nets *net); 534 void (*sctp_cwnd_update_after_sack) (struct sctp_tcb *stcb, 535 struct sctp_association *asoc, 536 int accum_moved, int reneged_all, int will_exit); 537 void (*sctp_cwnd_update_after_fr) (struct sctp_tcb *stcb, 538 struct sctp_association *asoc); 539 void (*sctp_cwnd_update_after_timeout) (struct sctp_tcb *stcb, 540 struct sctp_nets *net); 541 void (*sctp_cwnd_update_after_ecn_echo) (struct sctp_tcb *stcb, 542 struct sctp_nets *net); 543 void (*sctp_cwnd_update_after_packet_dropped) (struct sctp_tcb *stcb, 544 struct sctp_nets *net, struct sctp_pktdrop_chunk *cp, 545 uint32_t * bottle_bw, uint32_t * on_queue); 546 void (*sctp_cwnd_update_after_output) (struct sctp_tcb *stcb, 547 struct sctp_nets *net, int burst_limit); 548 void (*sctp_cwnd_update_after_fr_timer) (struct sctp_inpcb *inp, 549 struct sctp_tcb *stcb, struct sctp_nets *net); 550 }; 551 552 /* used to save ASCONF chunks for retransmission */ 553 TAILQ_HEAD(sctp_asconf_head, sctp_asconf); 554 struct sctp_asconf { 555 TAILQ_ENTRY(sctp_asconf) next; 556 uint32_t serial_number; 557 uint16_t snd_count; 558 struct mbuf *data; 559 uint16_t len; 560 }; 561 562 /* used to save ASCONF-ACK chunks for retransmission */ 563 TAILQ_HEAD(sctp_asconf_ackhead, sctp_asconf_ack); 564 struct sctp_asconf_ack { 565 TAILQ_ENTRY(sctp_asconf_ack) next; 566 uint32_t serial_number; 567 struct sctp_nets *last_sent_to; 568 struct mbuf *data; 569 uint16_t len; 570 }; 571 572 /* 573 * Here we have information about each individual association that we track. 574 * We probably in production would be more dynamic. But for ease of 575 * implementation we will have a fixed array that we hunt for in a linear 576 * fashion. 577 */ 578 struct sctp_association { 579 /* association state */ 580 int state; 581 582 /* queue of pending addrs to add/delete */ 583 struct sctp_asconf_addrhead asconf_queue; 584 585 struct timeval time_entered; /* time we entered state */ 586 struct timeval time_last_rcvd; 587 struct timeval time_last_sent; 588 struct timeval time_last_sat_advance; 589 struct sctp_nonpad_sndrcvinfo def_send; 590 591 /* timers and such */ 592 struct sctp_timer hb_timer; /* hb timer */ 593 struct sctp_timer dack_timer; /* Delayed ack timer */ 594 struct sctp_timer asconf_timer; /* asconf */ 595 struct sctp_timer strreset_timer; /* stream reset */ 596 struct sctp_timer shut_guard_timer; /* shutdown guard */ 597 struct sctp_timer autoclose_timer; /* automatic close timer */ 598 struct sctp_timer delayed_event_timer; /* timer for delayed events */ 599 struct sctp_timer delete_prim_timer; /* deleting primary dst */ 600 601 /* list of restricted local addresses */ 602 struct sctpladdr sctp_restricted_addrs; 603 604 /* last local address pending deletion (waiting for an address add) */ 605 struct sctp_ifa *asconf_addr_del_pending; 606 /* Deleted primary destination (used to stop timer) */ 607 struct sctp_nets *deleted_primary; 608 609 struct sctpnetlisthead nets; /* remote address list */ 610 611 /* Free chunk list */ 612 struct sctpchunk_listhead free_chunks; 613 614 /* Control chunk queue */ 615 struct sctpchunk_listhead control_send_queue; 616 617 /* ASCONF chunk queue */ 618 struct sctpchunk_listhead asconf_send_queue; 619 620 /* 621 * Once a TSN hits the wire it is moved to the sent_queue. We 622 * maintain two counts here (don't know if any but retran_cnt is 623 * needed). The idea is that the sent_queue_retran_cnt reflects how 624 * many chunks have been marked for retranmission by either T3-rxt 625 * or FR. 626 */ 627 struct sctpchunk_listhead sent_queue; 628 struct sctpchunk_listhead send_queue; 629 630 /* re-assembly queue for fragmented chunks on the inbound path */ 631 struct sctpchunk_listhead reasmqueue; 632 633 /* 634 * this queue is used when we reach a condition that we can NOT put 635 * data into the socket buffer. We track the size of this queue and 636 * set our rwnd to the space in the socket minus also the 637 * size_on_delivery_queue. 638 */ 639 struct sctpwheel_listhead out_wheel; 640 641 /* 642 * This pointer will be set to NULL most of the time. But when we 643 * have a fragmented message, where we could not get out all of the 644 * message at the last send then this will point to the stream to go 645 * get data from. 646 */ 647 struct sctp_stream_out *locked_on_sending; 648 649 /* If an iterator is looking at me, this is it */ 650 struct sctp_iterator *stcb_starting_point_for_iterator; 651 652 /* ASCONF save the last ASCONF-ACK so we can resend it if necessary */ 653 struct sctp_asconf_ackhead asconf_ack_sent; 654 655 /* 656 * pointer to last stream reset queued to control queue by us with 657 * requests. 658 */ 659 struct sctp_tmit_chunk *str_reset; 660 /* 661 * if Source Address Selection happening, this will rotate through 662 * the link list. 663 */ 664 struct sctp_laddr *last_used_address; 665 666 /* stream arrays */ 667 struct sctp_stream_in *strmin; 668 struct sctp_stream_out *strmout; 669 uint8_t *mapping_array; 670 /* primary destination to use */ 671 struct sctp_nets *primary_destination; 672 /* For CMT */ 673 struct sctp_nets *last_net_data_came_from; 674 /* last place I got a data chunk from */ 675 struct sctp_nets *last_data_chunk_from; 676 /* last place I got a control from */ 677 struct sctp_nets *last_control_chunk_from; 678 679 /* circular looking for output selection */ 680 struct sctp_stream_out *last_out_stream; 681 682 /* 683 * wait to the point the cum-ack passes req->send_reset_at_tsn for 684 * any req on the list. 685 */ 686 struct sctp_resethead resetHead; 687 688 /* queue of chunks waiting to be sent into the local stack */ 689 struct sctp_readhead pending_reply_queue; 690 691 /* JRS - the congestion control functions are in this struct */ 692 struct sctp_cc_functions cc_functions; 693 /* 694 * JRS - value to store the currently loaded congestion control 695 * module 696 */ 697 uint32_t congestion_control_module; 698 699 uint32_t vrf_id; 700 701 uint32_t cookie_preserve_req; 702 /* ASCONF next seq I am sending out, inits at init-tsn */ 703 uint32_t asconf_seq_out; 704 uint32_t asconf_seq_out_acked; 705 /* ASCONF last received ASCONF from peer, starts at peer's TSN-1 */ 706 uint32_t asconf_seq_in; 707 708 /* next seq I am sending in str reset messages */ 709 uint32_t str_reset_seq_out; 710 /* next seq I am expecting in str reset messages */ 711 uint32_t str_reset_seq_in; 712 713 /* various verification tag information */ 714 uint32_t my_vtag; /* The tag to be used. if assoc is re-initited 715 * by remote end, and I have unlocked this 716 * will be regenerated to a new random value. */ 717 uint32_t peer_vtag; /* The peers last tag */ 718 719 uint32_t my_vtag_nonce; 720 uint32_t peer_vtag_nonce; 721 722 uint32_t assoc_id; 723 724 /* This is the SCTP fragmentation threshold */ 725 uint32_t smallest_mtu; 726 727 /* 728 * Special hook for Fast retransmit, allows us to track the highest 729 * TSN that is NEW in this SACK if gap ack blocks are present. 730 */ 731 uint32_t this_sack_highest_gap; 732 733 /* 734 * The highest consecutive TSN that has been acked by peer on my 735 * sends 736 */ 737 uint32_t last_acked_seq; 738 739 /* The next TSN that I will use in sending. */ 740 uint32_t sending_seq; 741 742 /* Original seq number I used ??questionable to keep?? */ 743 uint32_t init_seq_number; 744 745 746 /* The Advanced Peer Ack Point, as required by the PR-SCTP */ 747 /* (A1 in Section 4.2) */ 748 uint32_t advanced_peer_ack_point; 749 750 /* 751 * The highest consequetive TSN at the bottom of the mapping array 752 * (for his sends). 753 */ 754 uint32_t cumulative_tsn; 755 /* 756 * Used to track the mapping array and its offset bits. This MAY be 757 * lower then cumulative_tsn. 758 */ 759 uint32_t mapping_array_base_tsn; 760 /* 761 * used to track highest TSN we have received and is listed in the 762 * mapping array. 763 */ 764 uint32_t highest_tsn_inside_map; 765 766 uint32_t last_echo_tsn; 767 uint32_t last_cwr_tsn; 768 uint32_t fast_recovery_tsn; 769 uint32_t sat_t3_recovery_tsn; 770 uint32_t tsn_last_delivered; 771 /* 772 * For the pd-api we should re-write this a bit more efficent. We 773 * could have multiple sctp_queued_to_read's that we are building at 774 * once. Now we only do this when we get ready to deliver to the 775 * socket buffer. Note that we depend on the fact that the struct is 776 * "stuck" on the read queue until we finish all the pd-api. 777 */ 778 struct sctp_queued_to_read *control_pdapi; 779 780 uint32_t tsn_of_pdapi_last_delivered; 781 uint32_t pdapi_ppid; 782 uint32_t context; 783 uint32_t last_reset_action[SCTP_MAX_RESET_PARAMS]; 784 uint32_t last_sending_seq[SCTP_MAX_RESET_PARAMS]; 785 uint32_t last_base_tsnsent[SCTP_MAX_RESET_PARAMS]; 786 #ifdef SCTP_ASOCLOG_OF_TSNS 787 /* 788 * special log - This adds considerable size to the asoc, but 789 * provides a log that you can use to detect problems via kgdb. 790 */ 791 struct sctp_tsn_log in_tsnlog[SCTP_TSN_LOG_SIZE]; 792 struct sctp_tsn_log out_tsnlog[SCTP_TSN_LOG_SIZE]; 793 uint32_t cumack_log[SCTP_TSN_LOG_SIZE]; 794 uint32_t cumack_logsnt[SCTP_TSN_LOG_SIZE]; 795 uint16_t tsn_in_at; 796 uint16_t tsn_out_at; 797 uint16_t tsn_in_wrapped; 798 uint16_t tsn_out_wrapped; 799 uint16_t cumack_log_at; 800 uint16_t cumack_log_atsnt; 801 #endif /* SCTP_ASOCLOG_OF_TSNS */ 802 #ifdef SCTP_FS_SPEC_LOG 803 struct sctp_fs_spec_log fslog[SCTP_FS_SPEC_LOG_SIZE]; 804 uint16_t fs_index; 805 #endif 806 807 /* 808 * window state information and smallest MTU that I use to bound 809 * segmentation 810 */ 811 uint32_t peers_rwnd; 812 uint32_t my_rwnd; 813 uint32_t my_last_reported_rwnd; 814 uint32_t sctp_frag_point; 815 816 uint32_t total_output_queue_size; 817 818 uint32_t sb_cc; /* shadow of sb_cc */ 819 uint32_t sb_send_resv; /* amount reserved on a send */ 820 uint32_t my_rwnd_control_len; /* shadow of sb_mbcnt used for rwnd 821 * control */ 822 /* 32 bit nonce stuff */ 823 uint32_t nonce_resync_tsn; 824 uint32_t nonce_wait_tsn; 825 uint32_t default_flowlabel; 826 uint32_t pr_sctp_cnt; 827 int ctrl_queue_cnt; /* could be removed REM */ 828 /* 829 * All outbound datagrams queue into this list from the individual 830 * stream queue. Here they get assigned a TSN and then await 831 * sending. The stream seq comes when it is first put in the 832 * individual str queue 833 */ 834 unsigned int stream_queue_cnt; 835 unsigned int send_queue_cnt; 836 unsigned int sent_queue_cnt; 837 unsigned int sent_queue_cnt_removeable; 838 /* 839 * Number on sent queue that are marked for retran until this value 840 * is 0 we only send one packet of retran'ed data. 841 */ 842 unsigned int sent_queue_retran_cnt; 843 844 unsigned int size_on_reasm_queue; 845 unsigned int cnt_on_reasm_queue; 846 /* amount of data (bytes) currently in flight (on all destinations) */ 847 unsigned int total_flight; 848 /* Total book size in flight */ 849 unsigned int total_flight_count; /* count of chunks used with 850 * book total */ 851 /* count of destinaton nets and list of destination nets */ 852 unsigned int numnets; 853 854 /* Total error count on this association */ 855 unsigned int overall_error_count; 856 857 unsigned int cnt_msg_on_sb; 858 859 /* All stream count of chunks for delivery */ 860 unsigned int size_on_all_streams; 861 unsigned int cnt_on_all_streams; 862 863 /* Heart Beat delay in ticks */ 864 unsigned int heart_beat_delay; 865 866 /* autoclose */ 867 unsigned int sctp_autoclose_ticks; 868 869 /* how many preopen streams we have */ 870 unsigned int pre_open_streams; 871 872 /* How many streams I support coming into me */ 873 unsigned int max_inbound_streams; 874 875 /* the cookie life I award for any cookie, in seconds */ 876 unsigned int cookie_life; 877 /* time to delay acks for */ 878 unsigned int delayed_ack; 879 unsigned int old_delayed_ack; 880 unsigned int sack_freq; 881 unsigned int data_pkts_seen; 882 883 unsigned int numduptsns; 884 int dup_tsns[SCTP_MAX_DUP_TSNS]; 885 unsigned int initial_init_rto_max; /* initial RTO for INIT's */ 886 unsigned int initial_rto; /* initial send RTO */ 887 unsigned int minrto; /* per assoc RTO-MIN */ 888 unsigned int maxrto; /* per assoc RTO-MAX */ 889 890 /* authentication fields */ 891 sctp_auth_chklist_t *local_auth_chunks; 892 sctp_auth_chklist_t *peer_auth_chunks; 893 sctp_hmaclist_t *local_hmacs; /* local HMACs supported */ 894 sctp_hmaclist_t *peer_hmacs; /* peer HMACs supported */ 895 struct sctp_keyhead shared_keys; /* assoc's shared keys */ 896 sctp_authinfo_t authinfo; /* randoms, cached keys */ 897 /* 898 * refcnt to block freeing when a sender or receiver is off coping 899 * user data in. 900 */ 901 uint32_t refcnt; 902 uint32_t chunks_on_out_queue; /* total chunks floating around, 903 * locked by send socket buffer */ 904 uint32_t peers_adaptation; 905 uint16_t peer_hmac_id; /* peer HMAC id to send */ 906 907 /* 908 * Being that we have no bag to collect stale cookies, and that we 909 * really would not want to anyway.. we will count them in this 910 * counter. We of course feed them to the pigeons right away (I have 911 * always thought of pigeons as flying rats). 912 */ 913 uint16_t stale_cookie_count; 914 915 /* 916 * For the partial delivery API, if up, invoked this is what last 917 * TSN I delivered 918 */ 919 uint16_t str_of_pdapi; 920 uint16_t ssn_of_pdapi; 921 922 /* counts of actual built streams. Allocation may be more however */ 923 /* could re-arrange to optimize space here. */ 924 uint16_t streamincnt; 925 uint16_t streamoutcnt; 926 927 /* my maximum number of retrans of INIT and SEND */ 928 /* copied from SCTP but should be individually setable */ 929 uint16_t max_init_times; 930 uint16_t max_send_times; 931 932 uint16_t def_net_failure; 933 934 /* 935 * lock flag: 0 is ok to send, 1+ (duals as a retran count) is 936 * awaiting ACK 937 */ 938 uint16_t mapping_array_size; 939 940 uint16_t last_strm_seq_delivered; 941 uint16_t last_strm_no_delivered; 942 943 uint16_t last_revoke_count; 944 int16_t num_send_timers_up; 945 946 uint16_t stream_locked_on; 947 uint16_t ecn_echo_cnt_onq; 948 949 uint16_t free_chunk_cnt; 950 951 uint8_t stream_locked; 952 uint8_t authenticated; /* packet authenticated ok */ 953 /* 954 * This flag indicates that a SACK need to be sent. Initially this 955 * is 1 to send the first sACK immediately. 956 */ 957 uint8_t send_sack; 958 959 /* max burst after fast retransmit completes */ 960 uint8_t max_burst; 961 962 uint8_t sat_network; /* RTT is in range of sat net or greater */ 963 uint8_t sat_network_lockout; /* lockout code */ 964 uint8_t burst_limit_applied; /* Burst limit in effect at last send? */ 965 /* flag goes on when we are doing a partial delivery api */ 966 uint8_t hb_random_values[4]; 967 uint8_t fragmented_delivery_inprogress; 968 uint8_t fragment_flags; 969 uint8_t last_flags_delivered; 970 uint8_t hb_ect_randombit; 971 uint8_t hb_random_idx; 972 uint8_t hb_is_disabled; /* is the hb disabled? */ 973 uint8_t default_tos; 974 uint8_t asconf_del_pending; /* asconf delete last addr pending */ 975 976 /* ECN Nonce stuff */ 977 uint8_t receiver_nonce_sum; /* nonce I sum and put in my sack */ 978 uint8_t ecn_nonce_allowed; /* Tells us if ECN nonce is on */ 979 uint8_t nonce_sum_check;/* On off switch used during re-sync */ 980 uint8_t nonce_wait_for_ecne; /* flag when we expect a ECN */ 981 uint8_t peer_supports_ecn_nonce; 982 983 /* 984 * This value, plus all other ack'd but above cum-ack is added 985 * together to cross check against the bit that we have yet to 986 * define (probably in the SACK). When the cum-ack is updated, this 987 * sum is updated as well. 988 */ 989 uint8_t nonce_sum_expect_base; 990 /* Flag to tell if ECN is allowed */ 991 uint8_t ecn_allowed; 992 993 /* flag to indicate if peer can do asconf */ 994 uint8_t peer_supports_asconf; 995 /* pr-sctp support flag */ 996 uint8_t peer_supports_prsctp; 997 /* peer authentication support flag */ 998 uint8_t peer_supports_auth; 999 /* stream resets are supported by the peer */ 1000 uint8_t peer_supports_strreset; 1001 1002 /* 1003 * packet drop's are supported by the peer, we don't really care 1004 * about this but we bookkeep it anyway. 1005 */ 1006 uint8_t peer_supports_pktdrop; 1007 1008 /* Do we allow V6/V4? */ 1009 uint8_t ipv4_addr_legal; 1010 uint8_t ipv6_addr_legal; 1011 /* Address scoping flags */ 1012 /* scope value for IPv4 */ 1013 uint8_t ipv4_local_scope; 1014 /* scope values for IPv6 */ 1015 uint8_t local_scope; 1016 uint8_t site_scope; 1017 /* loopback scope */ 1018 uint8_t loopback_scope; 1019 /* flags to handle send alternate net tracking */ 1020 uint8_t used_alt_onsack; 1021 uint8_t used_alt_asconfack; 1022 uint8_t fast_retran_loss_recovery; 1023 uint8_t sat_t3_loss_recovery; 1024 uint8_t dropped_special_cnt; 1025 uint8_t seen_a_sack_this_pkt; 1026 uint8_t stream_reset_outstanding; 1027 uint8_t stream_reset_out_is_outstanding; 1028 uint8_t delayed_connection; 1029 uint8_t ifp_had_enobuf; 1030 uint8_t saw_sack_with_frags; 1031 uint8_t in_restart_hash; 1032 uint8_t assoc_up_sent; 1033 uint8_t adaptation_needed; 1034 uint8_t adaptation_sent; 1035 /* CMT variables */ 1036 uint8_t cmt_dac_pkts_rcvd; 1037 uint8_t sctp_cmt_on_off; 1038 uint8_t iam_blocking; 1039 uint8_t cookie_how[8]; 1040 /* JRS 5/21/07 - CMT PF variable */ 1041 uint8_t sctp_cmt_pf; 1042 /* 1043 * The mapping array is used to track out of order sequences above 1044 * last_acked_seq. 0 indicates packet missing 1 indicates packet 1045 * rec'd. We slide it up every time we raise last_acked_seq and 0 1046 * trailing locactions out. If I get a TSN above the array 1047 * mappingArraySz, I discard the datagram and let retransmit happen. 1048 */ 1049 uint32_t marked_retrans; 1050 uint32_t timoinit; 1051 uint32_t timodata; 1052 uint32_t timosack; 1053 uint32_t timoshutdown; 1054 uint32_t timoheartbeat; 1055 uint32_t timocookie; 1056 uint32_t timoshutdownack; 1057 struct timeval start_time; 1058 struct timeval discontinuity_time; 1059 }; 1060 1061 #endif 1062