sctp_pcb.h revision 168943
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_pcb.h,v 1.21 2005/07/16 01:18:47 suz Exp $ */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: head/sys/netinet/sctp_pcb.h 168943 2007-04-22 11:06:27Z rrs $"); 35 36#ifndef __sctp_pcb_h__ 37#define __sctp_pcb_h__ 38 39#include <netinet/sctp_os.h> 40#include <netinet/sctp.h> 41#include <netinet/sctp_constants.h> 42 43LIST_HEAD(sctppcbhead, sctp_inpcb); 44LIST_HEAD(sctpasochead, sctp_tcb); 45LIST_HEAD(sctpladdr, sctp_laddr); 46LIST_HEAD(sctpvtaghead, sctp_tagblock); 47LIST_HEAD(sctp_vrflist, sctp_vrf); 48LIST_HEAD(sctp_ifnlist, sctp_ifn); 49LIST_HEAD(sctp_ifalist, sctp_ifa); 50TAILQ_HEAD(sctp_readhead, sctp_queued_to_read); 51TAILQ_HEAD(sctp_streamhead, sctp_stream_queue_pending); 52 53#include <netinet/sctp_structs.h> 54#include <netinet/sctp_uio.h> 55#include <netinet/sctp_auth.h> 56 57/* 58 * PCB flags (in sctp_flags bitmask) 59 */ 60#define SCTP_PCB_FLAGS_UDPTYPE 0x00000001 61#define SCTP_PCB_FLAGS_TCPTYPE 0x00000002 62#define SCTP_PCB_FLAGS_BOUNDALL 0x00000004 63#define SCTP_PCB_FLAGS_ACCEPTING 0x00000008 64#define SCTP_PCB_FLAGS_UNBOUND 0x00000010 65#define SCTP_PCB_FLAGS_CLOSE_IP 0x00040000 66#define SCTP_PCB_FLAGS_WAS_CONNECTED 0x00080000 67#define SCTP_PCB_FLAGS_WAS_ABORTED 0x00100000 68/* TCP model support */ 69 70#define SCTP_PCB_FLAGS_CONNECTED 0x00200000 71#define SCTP_PCB_FLAGS_IN_TCPPOOL 0x00400000 72#define SCTP_PCB_FLAGS_DONT_WAKE 0x00800000 73#define SCTP_PCB_FLAGS_WAKEOUTPUT 0x01000000 74#define SCTP_PCB_FLAGS_WAKEINPUT 0x02000000 75#define SCTP_PCB_FLAGS_BOUND_V6 0x04000000 76#define SCTP_PCB_FLAGS_NEEDS_MAPPED_V4 0x08000000 77#define SCTP_PCB_FLAGS_BLOCKING_IO 0x10000000 78#define SCTP_PCB_FLAGS_SOCKET_GONE 0x20000000 79#define SCTP_PCB_FLAGS_SOCKET_ALLGONE 0x40000000 80/* flags to copy to new PCB */ 81#define SCTP_PCB_COPY_FLAGS 0x0e000004 82 83 84/* 85 * PCB Features (in sctp_features bitmask) 86 */ 87#define SCTP_PCB_FLAGS_EXT_RCVINFO 0x00000002 88#define SCTP_PCB_FLAGS_DONOT_HEARTBEAT 0x00000004 89#define SCTP_PCB_FLAGS_FRAG_INTERLEAVE 0x00000008 90#define SCTP_PCB_FLAGS_INTERLEAVE_STRMS 0x00000010 91#define SCTP_PCB_FLAGS_DO_ASCONF 0x00000020 92#define SCTP_PCB_FLAGS_AUTO_ASCONF 0x00000040 93/* socket options */ 94#define SCTP_PCB_FLAGS_NODELAY 0x00000100 95#define SCTP_PCB_FLAGS_AUTOCLOSE 0x00000200 96#define SCTP_PCB_FLAGS_RECVDATAIOEVNT 0x00000400 97#define SCTP_PCB_FLAGS_RECVASSOCEVNT 0x00000800 98#define SCTP_PCB_FLAGS_RECVPADDREVNT 0x00001000 99#define SCTP_PCB_FLAGS_RECVPEERERR 0x00002000 100#define SCTP_PCB_FLAGS_RECVSENDFAILEVNT 0x00004000 101#define SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT 0x00008000 102#define SCTP_PCB_FLAGS_ADAPTATIONEVNT 0x00010000 103#define SCTP_PCB_FLAGS_PDAPIEVNT 0x00020000 104#define SCTP_PCB_FLAGS_AUTHEVNT 0x00040000 105#define SCTP_PCB_FLAGS_STREAM_RESETEVNT 0x00080000 106#define SCTP_PCB_FLAGS_NO_FRAGMENT 0x00100000 107#define SCTP_PCB_FLAGS_EXPLICIT_EOR 0x00400000 108 109 110#define SCTP_PCBHASH_ALLADDR(port, mask) (port & mask) 111#define SCTP_PCBHASH_ASOC(tag, mask) (tag & mask) 112 113struct sctp_vrf { 114 LIST_ENTRY(sctp_vrf) next_vrf; 115 struct sctp_ifalist *vrf_addr_hash; 116 struct sctp_ifnlist ifnlist; 117 uint32_t vrf_id; 118 uint32_t total_ifa_count; 119 u_long vrf_hashmark; 120}; 121 122struct sctp_ifn { 123 struct sctp_ifalist ifalist; 124 struct sctp_vrf *vrf; 125 LIST_ENTRY(sctp_ifn) next_ifn; 126 void *ifn_p; /* never access without appropriate lock */ 127 uint32_t ifn_type; 128 uint32_t ifn_index; /* shorthand way to look at ifn for reference */ 129 uint32_t refcount; /* number of reference held should be >= 130 * ifa_count */ 131 uint32_t ifa_count; /* IFA's we hold (in our list - ifalist) */ 132 char ifn_name[SCTP_IFNAMSIZ]; 133}; 134 135/* SCTP local IFA flags */ 136#define SCTP_ADDR_VALID 0x00000001 /* its up and active */ 137#define SCTP_BEING_DELETED 0x00000002 /* being deleted, when 138 * refcount = 0. Note that it 139 * is pulled from the ifn list 140 * and ifa_p is nulled right 141 * away but it cannot be freed 142 * until the last *net 143 * pointing to it is deleted. */ 144#define SCTP_ADDR_DEFER_USE 0x00000004 /* Hold off using this one */ 145#define SCTP_ADDR_IFA_UNUSEABLE 0x00000008 146 147struct sctp_ifa { 148 LIST_ENTRY(sctp_ifa) next_ifa; 149 LIST_ENTRY(sctp_ifa) next_bucket; 150 struct sctp_ifn *ifn_p; /* back pointer to parent ifn */ 151 void *ifa; /* pointer to ifa, needed for flag update for 152 * that we MUST lock appropriate locks. This 153 * is for V6. */ 154 union sctp_sockstore address; 155 uint32_t refcount; /* number of folks refering to this */ 156 uint32_t flags; 157 uint32_t localifa_flags; 158 uint8_t src_is_loop; 159 uint8_t src_is_priv; 160 uint8_t src_is_glob; 161 uint8_t in_ifa_list; 162}; 163 164struct sctp_laddr { 165 LIST_ENTRY(sctp_laddr) sctp_nxt_addr; /* next in list */ 166 struct sctp_ifa *ifa; 167 uint32_t action; /* Used during asconf and adding if no-zero 168 * src-addr selection will not consider this 169 * address. */ 170}; 171 172struct sctp_block_entry { 173 int error; 174}; 175 176struct sctp_timewait { 177 uint32_t tv_sec_at_expire; /* the seconds from boot to expire */ 178 uint32_t v_tag; /* the vtag that can not be reused */ 179}; 180 181struct sctp_tagblock { 182 LIST_ENTRY(sctp_tagblock) sctp_nxt_tagblock; 183 struct sctp_timewait vtag_block[SCTP_NUMBER_IN_VTAG_BLOCK]; 184}; 185 186struct sctp_epinfo { 187 struct sctpasochead *sctp_asochash; 188 u_long hashasocmark; 189 190 struct sctppcbhead *sctp_ephash; 191 u_long hashmark; 192 193 struct sctpasochead *sctp_restarthash; 194 u_long hashrestartmark; 195 /*- 196 * The TCP model represents a substantial overhead in that we get an 197 * additional hash table to keep explicit connections in. The 198 * listening TCP endpoint will exist in the usual ephash above and 199 * accept only INIT's. It will be incapable of sending off an INIT. 200 * When a dg arrives we must look in the normal ephash. If we find a 201 * TCP endpoint that will tell us to go to the specific endpoint 202 * hash and re-hash to find the right assoc/socket. If we find a UDP 203 * model socket we then must complete the lookup. If this fails, 204 * i.e. no association can be found then we must continue to see if 205 * a sctp_peeloff()'d socket is in the tcpephash (a spun off socket 206 * acts like a TCP model connected socket). 207 */ 208 struct sctppcbhead *sctp_tcpephash; 209 u_long hashtcpmark; 210 uint32_t hashtblsize; 211 212 struct sctp_vrflist *sctp_vrfhash; 213 u_long hashvrfmark; 214 215 struct sctppcbhead listhead; 216 struct sctpladdr addr_wq; 217 218 struct sctpiterators iteratorhead; 219 220 /* ep zone info */ 221 sctp_zone_t ipi_zone_ep; 222 sctp_zone_t ipi_zone_asoc; 223 sctp_zone_t ipi_zone_laddr; 224 sctp_zone_t ipi_zone_net; 225 sctp_zone_t ipi_zone_chunk; 226 sctp_zone_t ipi_zone_readq; 227 sctp_zone_t ipi_zone_strmoq; 228 229 struct mtx ipi_ep_mtx; 230 struct mtx it_mtx; 231 struct mtx ipi_iterator_wq_mtx; 232 struct mtx ipi_addr_mtx; 233 uint32_t ipi_count_ep; 234 235 /* assoc/tcb zone info */ 236 uint32_t ipi_count_asoc; 237 238 /* local addrlist zone info */ 239 uint32_t ipi_count_laddr; 240 241 /* remote addrlist zone info */ 242 uint32_t ipi_count_raddr; 243 244 /* chunk structure list for output */ 245 uint32_t ipi_count_chunk; 246 247 /* socket queue zone info */ 248 uint32_t ipi_count_readq; 249 250 /* socket queue zone info */ 251 uint32_t ipi_count_strmoq; 252 253 /* system wide number of free chunks hanging around */ 254 uint32_t ipi_free_chunks; 255 uint32_t ipi_free_strmoq; 256 257 struct sctpvtaghead vtag_timewait[SCTP_STACK_VTAG_HASH_SIZE]; 258 259 /* address work queue handling */ 260#if defined(SCTP_USE_THREAD_BASED_ITERATOR) 261 uint32_t iterator_running; 262 SCTP_PROCESS_STRUCT thread_proc; 263#endif 264 struct sctp_timer addr_wq_timer; 265 266}; 267 268/*- 269 * Here we have all the relevant information for each SCTP entity created. We 270 * will need to modify this as approprate. We also need to figure out how to 271 * access /dev/random. 272 */ 273struct sctp_pcb { 274 unsigned int time_of_secret_change; /* number of seconds from 275 * timeval.tv_sec */ 276 uint32_t secret_key[SCTP_HOW_MANY_SECRETS][SCTP_NUMBER_OF_SECRETS]; 277 unsigned int size_of_a_cookie; 278 279 unsigned int sctp_timeoutticks[SCTP_NUM_TMRS]; 280 unsigned int sctp_minrto; 281 unsigned int sctp_maxrto; 282 unsigned int initial_rto; 283 int initial_init_rto_max; 284 285 unsigned int sctp_sack_freq; 286 uint32_t sctp_sws_sender; 287 uint32_t sctp_sws_receiver; 288 289 /* authentication related fields */ 290 struct sctp_keyhead shared_keys; 291 sctp_auth_chklist_t *local_auth_chunks; 292 sctp_hmaclist_t *local_hmacs; 293 uint16_t default_keyid; 294 295 /* various thresholds */ 296 /* Max times I will init at a guy */ 297 uint16_t max_init_times; 298 299 /* Max times I will send before we consider someone dead */ 300 uint16_t max_send_times; 301 302 uint16_t def_net_failure; 303 304 /* number of streams to pre-open on a association */ 305 uint16_t pre_open_stream_count; 306 uint16_t max_open_streams_intome; 307 308 /* random number generator */ 309 uint32_t random_counter; 310 uint8_t random_numbers[SCTP_SIGNATURE_ALOC_SIZE]; 311 uint8_t random_store[SCTP_SIGNATURE_ALOC_SIZE]; 312 313 /* 314 * This timer is kept running per endpoint. When it fires it will 315 * change the secret key. The default is once a hour 316 */ 317 struct sctp_timer signature_change; 318 int def_cookie_life; 319 /* defaults to 0 */ 320 int auto_close_time; 321 uint32_t initial_sequence_debug; 322 uint32_t adaptation_layer_indicator; 323 char store_at; 324 uint8_t max_burst; 325 char current_secret_number; 326 char last_secret_number; 327}; 328 329#ifndef SCTP_ALIGNMENT 330#define SCTP_ALIGNMENT 32 331#endif 332 333#ifndef SCTP_ALIGNM1 334#define SCTP_ALIGNM1 (SCTP_ALIGNMENT-1) 335#endif 336 337#define sctp_lport ip_inp.inp.inp_lport 338 339struct sctp_inpcb { 340 /*- 341 * put an inpcb in front of it all, kind of a waste but we need to 342 * for compatability with all the other stuff. 343 */ 344 union { 345 struct inpcb inp; 346 char align[(sizeof(struct in6pcb) + SCTP_ALIGNM1) & 347 ~SCTP_ALIGNM1]; 348 } ip_inp; 349 350 351 /* Socket buffer lock protects read_queue and of course sb_cc */ 352 struct sctp_readhead read_queue; 353 354 LIST_ENTRY(sctp_inpcb) sctp_list; /* lists all endpoints */ 355 /* hash of all endpoints for model */ 356 LIST_ENTRY(sctp_inpcb) sctp_hash; 357 /* count of local addresses bound, 0 if bound all */ 358 int laddr_count; 359 360 /* list of addrs in use by the EP, NULL if bound-all */ 361 struct sctpladdr sctp_addr_list; 362 /* 363 * used for source address selection rotation when we are subset 364 * bound 365 */ 366 struct sctp_laddr *next_addr_touse; 367 368 /* back pointer to our socket */ 369 struct socket *sctp_socket; 370 uint32_t sctp_flags; /* INP state flag set */ 371 uint32_t sctp_features; /* Feature flags */ 372 struct sctp_pcb sctp_ep;/* SCTP ep data */ 373 /* head of the hash of all associations */ 374 struct sctpasochead *sctp_tcbhash; 375 u_long sctp_hashmark; 376 /* head of the list of all associations */ 377 struct sctpasochead sctp_asoc_list; 378#ifdef SCTP_TRACK_FREED_ASOCS 379 struct sctpasochead sctp_asoc_free_list; 380#endif 381 struct sctp_iterator *inp_starting_point_for_iterator; 382 uint32_t sctp_frag_point; 383 uint32_t partial_delivery_point; 384 uint32_t sctp_context; 385 struct sctp_sndrcvinfo def_send; 386 /*- 387 * These three are here for the sosend_dgram 388 * (pkt, pkt_last and control). 389 * routine. However, I don't think anyone in 390 * the current FreeBSD kernel calls this. So 391 * they are candidates with sctp_sendm for 392 * de-supporting. 393 */ 394 struct mbuf *pkt, *pkt_last; 395 struct mbuf *control; 396 struct mtx inp_mtx; 397 struct mtx inp_create_mtx; 398 struct mtx inp_rdata_mtx; 399 int32_t refcount; 400 uint32_t def_vrf_id; 401 uint32_t total_sends; 402 uint32_t total_recvs; 403 uint32_t last_abort_code; 404 uint32_t total_nospaces; 405}; 406 407struct sctp_tcb { 408 struct socket *sctp_socket; /* back pointer to socket */ 409 struct sctp_inpcb *sctp_ep; /* back pointer to ep */ 410 LIST_ENTRY(sctp_tcb) sctp_tcbhash; /* next link in hash 411 * table */ 412 LIST_ENTRY(sctp_tcb) sctp_tcblist; /* list of all of the 413 * TCB's */ 414 LIST_ENTRY(sctp_tcb) sctp_tcbrestarhash; /* next link in restart 415 * hash table */ 416 LIST_ENTRY(sctp_tcb) sctp_asocs; /* vtag hash list */ 417 struct sctp_block_entry *block_entry; /* pointer locked by socket 418 * send buffer */ 419 struct sctp_association asoc; 420 /*- 421 * freed_by_sorcv_sincelast is protected by the sockbuf_lock NOT the 422 * tcb_lock. Its special in this way to help avoid extra mutex calls 423 * in the reading of data. 424 */ 425 uint32_t freed_by_sorcv_sincelast; 426 uint32_t total_sends; 427 uint32_t total_recvs; 428 int freed_from_where; 429 uint16_t rport; /* remote port in network format */ 430 uint16_t resv; 431 struct mtx tcb_mtx; 432 struct mtx tcb_send_mtx; 433}; 434 435 436 437#include <netinet/sctp_lock_bsd.h> 438 439 440#if defined(_KERNEL) 441 442extern struct sctp_epinfo sctppcbinfo; 443 444int SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b); 445 446void sctp_fill_pcbinfo(struct sctp_pcbinfo *); 447 448struct sctp_ifn * 449 sctp_find_ifn(struct sctp_vrf *vrf, void *ifn, uint32_t ifn_index); 450 451struct sctp_vrf *sctp_allocate_vrf(int vrfid); 452 453struct sctp_vrf *sctp_find_vrf(uint32_t vrfid); 454 455struct sctp_ifa * 456sctp_add_addr_to_vrf(uint32_t vrfid, 457 void *ifn, uint32_t ifn_index, uint32_t ifn_type, 458 const char *if_name, 459 void *ifa, struct sockaddr *addr, uint32_t ifa_flags); 460 461void sctp_free_ifa(struct sctp_ifa *sctp_ifap); 462 463struct sctp_ifa * 464sctp_del_addr_from_vrf(uint32_t vrfid, struct sockaddr *addr, 465 uint32_t ifn_index); 466 467 468 469 470struct sctp_nets *sctp_findnet(struct sctp_tcb *, struct sockaddr *); 471 472struct sctp_inpcb *sctp_pcb_findep(struct sockaddr *, int, int, uint32_t); 473 474int sctp_inpcb_bind(struct socket *, struct sockaddr *, struct thread *); 475 476 477struct sctp_tcb * 478sctp_findassociation_addr(struct mbuf *, int, int, 479 struct sctphdr *, struct sctp_chunkhdr *, struct sctp_inpcb **, 480 struct sctp_nets **, uint32_t vrf_id); 481 482struct sctp_tcb * 483sctp_findassociation_addr_sa(struct sockaddr *, 484 struct sockaddr *, struct sctp_inpcb **, struct sctp_nets **, int, uint32_t); 485 486void 487sctp_move_pcb_and_assoc(struct sctp_inpcb *, struct sctp_inpcb *, 488 struct sctp_tcb *); 489 490/*- 491 * For this call ep_addr, the to is the destination endpoint address of the 492 * peer (relative to outbound). The from field is only used if the TCP model 493 * is enabled and helps distingush amongst the subset bound (non-boundall). 494 * The TCP model MAY change the actual ep field, this is why it is passed. 495 */ 496struct sctp_tcb * 497sctp_findassociation_ep_addr(struct sctp_inpcb **, 498 struct sockaddr *, struct sctp_nets **, struct sockaddr *, 499 struct sctp_tcb *); 500 501struct sctp_tcb * 502sctp_findassociation_ep_asocid(struct sctp_inpcb *, 503 sctp_assoc_t, int); 504 505struct sctp_tcb * 506sctp_findassociation_ep_asconf(struct mbuf *, int, int, 507 struct sctphdr *, struct sctp_inpcb **, struct sctp_nets **); 508 509int sctp_inpcb_alloc(struct socket *); 510 511int sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id); 512 513void sctp_inpcb_free(struct sctp_inpcb *, int, int); 514 515struct sctp_tcb * 516sctp_aloc_assoc(struct sctp_inpcb *, struct sockaddr *, 517 int, int *, uint32_t, uint32_t); 518 519int sctp_free_assoc(struct sctp_inpcb *, struct sctp_tcb *, int, int); 520 521void 522 sctp_add_vtag_to_timewait(struct sctp_inpcb *, uint32_t, uint32_t); 523 524int sctp_add_local_addr_ep(struct sctp_inpcb *, struct sctp_ifa *, uint32_t); 525 526int sctp_insert_laddr(struct sctpladdr *, struct sctp_ifa *, uint32_t); 527 528void sctp_remove_laddr(struct sctp_laddr *); 529 530int sctp_del_local_addr_ep(struct sctp_inpcb *, struct sctp_ifa *); 531 532void sctp_set_initial_cc_param(struct sctp_tcb *, struct sctp_nets *net); 533 534 535int sctp_add_remote_addr(struct sctp_tcb *, struct sockaddr *, int, int); 536 537void sctp_remove_net(struct sctp_tcb *, struct sctp_nets *); 538 539int sctp_del_remote_addr(struct sctp_tcb *, struct sockaddr *); 540 541void sctp_pcb_init(void); 542 543int sctp_add_local_addr_assoc(struct sctp_tcb *, struct sctp_ifa *, int); 544 545int sctp_del_local_addr_assoc(struct sctp_tcb *, struct sctp_ifa *); 546 547int 548sctp_load_addresses_from_init(struct sctp_tcb *, struct mbuf *, int, int, 549 int, struct sctphdr *, struct sockaddr *); 550 551int 552sctp_set_primary_addr(struct sctp_tcb *, struct sockaddr *, 553 struct sctp_nets *); 554 555int sctp_is_vtag_good(struct sctp_inpcb *, uint32_t, struct timeval *); 556 557/* void sctp_drain(void); */ 558 559int sctp_destination_is_reachable(struct sctp_tcb *, struct sockaddr *); 560 561/*- 562 * Null in last arg inpcb indicate run on ALL ep's. Specific inp in last arg 563 * indicates run on ONLY assoc's of the specified endpoint. 564 */ 565int 566sctp_initiate_iterator(inp_func inpf, 567 asoc_func af, 568 inp_func inpe, 569 uint32_t, uint32_t, 570 uint32_t, void *, 571 uint32_t, 572 end_func ef, 573 struct sctp_inpcb *, 574 uint8_t co_off); 575 576#endif /* _KERNEL */ 577#endif /* !__sctp_pcb_h__ */ 578