1 /*- 2 * Copyright (c) 1982, 1986, 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 */ 30 31 /* __Userspace__ version of <sys/socketvar.h> goes here.*/ 32 33 #ifndef _USER_SOCKETVAR_H_ 34 #define _USER_SOCKETVAR_H_ 35 36 #if defined(__APPLE__) 37 #include <sys/types.h> 38 #include <unistd.h> 39 #endif 40 41 /* #include <sys/selinfo.h> */ /*__Userspace__ alternative?*/ /* for struct selinfo */ 42 /* #include <sys/_lock.h> was 0 byte file */ 43 /* #include <sys/_mutex.h> was 0 byte file */ 44 /* #include <sys/_sx.h> */ /*__Userspace__ alternative?*/ 45 #if !defined(__DragonFly__) && !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(_WIN32) && !defined(__native_client__) 46 #include <sys/uio.h> 47 #endif 48 #define SOCK_MAXADDRLEN 255 49 #if !defined(MSG_NOTIFICATION) 50 #define MSG_NOTIFICATION 0x2000 /* SCTP notification */ 51 #endif 52 #define SCTP_SO_LINGER 0x0001 53 #define SCTP_SO_ACCEPTCONN 0x0002 54 #define SS_CANTRCVMORE 0x020 55 #define SS_CANTSENDMORE 0x010 56 57 #if defined(__APPLE__) || defined(__DragonFly__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(_WIN32) || defined(__native_client__) 58 #define UIO_MAXIOV 1024 59 #define ERESTART (-1) 60 #endif 61 62 #if !defined(__APPLE__) && !defined(__NetBSD__) && !defined(__OpenBSD__) 63 enum uio_rw { UIO_READ, UIO_WRITE }; 64 #endif 65 66 #if !defined(__NetBSD__) && !defined(__OpenBSD__) 67 /* Segment flag values. */ 68 enum uio_seg { 69 UIO_USERSPACE, /* from user data space */ 70 UIO_SYSSPACE /* from system space */ 71 }; 72 #endif 73 74 struct proc { 75 int stub; /* struct proc is a dummy for __Userspace__ */ 76 }; 77 78 MALLOC_DECLARE(M_ACCF); 79 MALLOC_DECLARE(M_PCB); 80 MALLOC_DECLARE(M_SONAME); 81 82 /* __Userspace__ Are these all the fields we need? 83 * Removing struct thread *uio_td; owner field 84 */ 85 struct uio { 86 struct iovec *uio_iov; /* scatter/gather list */ 87 int uio_iovcnt; /* length of scatter/gather list */ 88 off_t uio_offset; /* offset in target object */ 89 ssize_t uio_resid; /* remaining bytes to process */ 90 enum uio_seg uio_segflg; /* address space */ 91 enum uio_rw uio_rw; /* operation */ 92 }; 93 94 95 /* __Userspace__ */ 96 97 /* 98 * Kernel structure per socket. 99 * Contains send and receive buffer queues, 100 * handle on protocol and pointer to protocol 101 * private data and error information. 102 */ 103 #if defined(_WIN32) 104 #define AF_ROUTE 17 105 #if !defined(__MINGW32__) 106 typedef __int32 pid_t; 107 #endif 108 typedef unsigned __int32 uid_t; 109 enum sigType { 110 SIGNAL = 0, 111 BROADCAST = 1, 112 MAX_EVENTS = 2 113 }; 114 #endif 115 116 /*- 117 * Locking key to struct socket: 118 * (a) constant after allocation, no locking required. 119 * (b) locked by SOCK_LOCK(so). 120 * (c) locked by SOCKBUF_LOCK(&so->so_rcv). 121 * (d) locked by SOCKBUF_LOCK(&so->so_snd). 122 * (e) locked by ACCEPT_LOCK(). 123 * (f) not locked since integer reads/writes are atomic. 124 * (g) used only as a sleep/wakeup address, no value. 125 * (h) locked by global mutex so_global_mtx. 126 */ 127 struct socket { 128 int so_count; /* (b) reference count */ 129 short so_type; /* (a) generic type, see socket.h */ 130 short so_options; /* from socket call, see socket.h */ 131 short so_linger; /* time to linger while closing */ 132 short so_state; /* (b) internal state flags SS_* */ 133 int so_qstate; /* (e) internal state flags SQ_* */ 134 void *so_pcb; /* protocol control block */ 135 int so_dom; 136 /* 137 * Variables for connection queuing. 138 * Socket where accepts occur is so_head in all subsidiary sockets. 139 * If so_head is 0, socket is not related to an accept. 140 * For head socket so_incomp queues partially completed connections, 141 * while so_comp is a queue of connections ready to be accepted. 142 * If a connection is aborted and it has so_head set, then 143 * it has to be pulled out of either so_incomp or so_comp. 144 * We allow connections to queue up based on current queue lengths 145 * and limit on number of queued connections for this socket. 146 */ 147 struct socket *so_head; /* (e) back pointer to listen socket */ 148 TAILQ_HEAD(, socket) so_incomp; /* (e) queue of partial unaccepted connections */ 149 TAILQ_HEAD(, socket) so_comp; /* (e) queue of complete unaccepted connections */ 150 TAILQ_ENTRY(socket) so_list; /* (e) list of unaccepted connections */ 151 u_short so_qlen; /* (e) number of unaccepted connections */ 152 u_short so_incqlen; /* (e) number of unaccepted incomplete 153 connections */ 154 u_short so_qlimit; /* (e) max number queued connections */ 155 short so_timeo; /* (g) connection timeout */ 156 userland_cond_t timeo_cond; /* timeo_cond condition variable being used in wakeup */ 157 158 u_short so_error; /* (f) error affecting connection */ 159 struct sigio *so_sigio; /* [sg] information for async I/O or 160 out of band data (SIGURG) */ 161 u_long so_oobmark; /* (c) chars to oob mark */ 162 TAILQ_HEAD(, aiocblist) so_aiojobq; /* AIO ops waiting on socket */ 163 /* 164 * Variables for socket buffering. 165 */ 166 struct sockbuf { 167 /* __Userspace__ Many of these fields may 168 * not be required for the sctp stack. 169 * Commenting out the following. 170 * Including pthread mutex and condition variable to be 171 * used by sbwait, sorwakeup and sowwakeup. 172 */ 173 /* struct selinfo sb_sel;*/ /* process selecting read/write */ 174 /* struct mtx sb_mtx;*/ /* sockbuf lock */ 175 /* struct sx sb_sx;*/ /* prevent I/O interlacing */ 176 userland_cond_t sb_cond; /* sockbuf condition variable */ 177 userland_mutex_t sb_mtx; /* sockbuf lock associated with sb_cond */ 178 short sb_state; /* (c/d) socket state on sockbuf */ 179 #define sb_startzero sb_mb 180 struct mbuf *sb_mb; /* (c/d) the mbuf chain */ 181 struct mbuf *sb_mbtail; /* (c/d) the last mbuf in the chain */ 182 struct mbuf *sb_lastrecord; /* (c/d) first mbuf of last 183 * record in socket buffer */ 184 struct mbuf *sb_sndptr; /* (c/d) pointer into mbuf chain */ 185 u_int sb_sndptroff; /* (c/d) byte offset of ptr into chain */ 186 u_int sb_cc; /* (c/d) actual chars in buffer */ 187 u_int sb_hiwat; /* (c/d) max actual char count */ 188 u_int sb_mbcnt; /* (c/d) chars of mbufs used */ 189 u_int sb_mbmax; /* (c/d) max chars of mbufs to use */ 190 u_int sb_ctl; /* (c/d) non-data chars in buffer */ 191 int sb_lowat; /* (c/d) low water mark */ 192 int sb_timeo; /* (c/d) timeout for read/write */ 193 short sb_flags; /* (c/d) flags, see below */ 194 } so_rcv, so_snd; 195 /* 196 * Constants for sb_flags field of struct sockbuf. 197 */ 198 #define SB_MAX (256*1024) /* default for max chars in sockbuf */ 199 #define SB_RAW (64*1024*2) /*Aligning so->so_rcv.sb_hiwat with the receive buffer size of raw socket*/ 200 /* 201 * Constants for sb_flags field of struct sockbuf. 202 */ 203 #define SB_WAIT 0x04 /* someone is waiting for data/space */ 204 #define SB_SEL 0x08 /* someone is selecting */ 205 #define SB_ASYNC 0x10 /* ASYNC I/O, need signals */ 206 #define SB_UPCALL 0x20 /* someone wants an upcall */ 207 #define SB_NOINTR 0x40 /* operations not interruptible */ 208 #define SB_AIO 0x80 /* AIO operations queued */ 209 #define SB_KNOTE 0x100 /* kernel note attached */ 210 #define SB_AUTOSIZE 0x800 /* automatically size socket buffer */ 211 212 void (*so_upcall)(struct socket *, void *, int); 213 void *so_upcallarg; 214 struct ucred *so_cred; /* (a) user credentials */ 215 struct label *so_label; /* (b) MAC label for socket */ 216 struct label *so_peerlabel; /* (b) cached MAC label for peer */ 217 /* NB: generation count must not be first. */ 218 uint32_t so_gencnt; /* (h) generation count */ 219 void *so_emuldata; /* (b) private data for emulators */ 220 struct so_accf { 221 struct accept_filter *so_accept_filter; 222 void *so_accept_filter_arg; /* saved filter args */ 223 char *so_accept_filter_str; /* saved user args */ 224 } *so_accf; 225 }; 226 227 #define SB_EMPTY_FIXUP(sb) do { \ 228 if ((sb)->sb_mb == NULL) { \ 229 (sb)->sb_mbtail = NULL; \ 230 (sb)->sb_lastrecord = NULL; \ 231 } \ 232 } while (/*CONSTCOND*/0) 233 234 /* 235 * Global accept mutex to serialize access to accept queues and 236 * fields associated with multiple sockets. This allows us to 237 * avoid defining a lock order between listen and accept sockets 238 * until such time as it proves to be a good idea. 239 */ 240 #if defined(_WIN32) 241 extern userland_mutex_t accept_mtx; 242 extern userland_cond_t accept_cond; 243 #define ACCEPT_LOCK_ASSERT() 244 #define ACCEPT_LOCK() do { \ 245 EnterCriticalSection(&accept_mtx); \ 246 } while (0) 247 #define ACCEPT_UNLOCK() do { \ 248 LeaveCriticalSection(&accept_mtx); \ 249 } while (0) 250 #define ACCEPT_UNLOCK_ASSERT() 251 #else 252 extern userland_mutex_t accept_mtx; 253 254 extern userland_cond_t accept_cond; 255 #ifdef INVARIANTS 256 #define ACCEPT_LOCK() KASSERT(pthread_mutex_lock(&accept_mtx) == 0, ("%s: accept_mtx already locked", __func__)) 257 #define ACCEPT_UNLOCK() KASSERT(pthread_mutex_unlock(&accept_mtx) == 0, ("%s: accept_mtx not locked", __func__)) 258 #else 259 #define ACCEPT_LOCK() (void)pthread_mutex_lock(&accept_mtx) 260 #define ACCEPT_UNLOCK() (void)pthread_mutex_unlock(&accept_mtx) 261 #endif 262 #define ACCEPT_LOCK_ASSERT() \ 263 KASSERT(pthread_mutex_trylock(&accept_mtx) == EBUSY, ("%s: accept_mtx not locked", __func__)) 264 #define ACCEPT_UNLOCK_ASSERT() do { \ 265 KASSERT(pthread_mutex_trylock(&accept_mtx) == 0, ("%s: accept_mtx locked", __func__)); \ 266 (void)pthread_mutex_unlock(&accept_mtx); \ 267 } while (0) 268 #endif 269 270 /* 271 * Per-socket buffer mutex used to protect most fields in the socket 272 * buffer. 273 */ 274 #define SOCKBUF_MTX(_sb) (&(_sb)->sb_mtx) 275 #if defined(_WIN32) 276 #define SOCKBUF_LOCK_INIT(_sb, _name) \ 277 InitializeCriticalSection(SOCKBUF_MTX(_sb)) 278 #define SOCKBUF_LOCK_DESTROY(_sb) DeleteCriticalSection(SOCKBUF_MTX(_sb)) 279 #define SOCKBUF_COND_INIT(_sb) InitializeConditionVariable((&(_sb)->sb_cond)) 280 #define SOCKBUF_COND_DESTROY(_sb) DeleteConditionVariable((&(_sb)->sb_cond)) 281 #define SOCK_COND_INIT(_so) InitializeConditionVariable((&(_so)->timeo_cond)) 282 #define SOCK_COND_DESTROY(_so) DeleteConditionVariable((&(_so)->timeo_cond)) 283 #define SOCK_COND(_so) (&(_so)->timeo_cond) 284 #else 285 #ifdef INVARIANTS 286 #define SOCKBUF_LOCK_INIT(_sb, _name) do { \ 287 pthread_mutexattr_t mutex_attr; \ 288 \ 289 pthread_mutexattr_init(&mutex_attr); \ 290 pthread_mutexattr_settype(&mutex_attr, PTHREAD_MUTEX_ERRORCHECK); \ 291 pthread_mutex_init(SOCKBUF_MTX(_sb), &mutex_attr); \ 292 pthread_mutexattr_destroy(&mutex_attr); \ 293 } while (0) 294 #else 295 #define SOCKBUF_LOCK_INIT(_sb, _name) \ 296 pthread_mutex_init(SOCKBUF_MTX(_sb), NULL) 297 #endif 298 #define SOCKBUF_LOCK_DESTROY(_sb) pthread_mutex_destroy(SOCKBUF_MTX(_sb)) 299 #define SOCKBUF_COND_INIT(_sb) pthread_cond_init((&(_sb)->sb_cond), NULL) 300 #define SOCKBUF_COND_DESTROY(_sb) pthread_cond_destroy((&(_sb)->sb_cond)) 301 #define SOCK_COND_INIT(_so) pthread_cond_init((&(_so)->timeo_cond), NULL) 302 #define SOCK_COND_DESTROY(_so) pthread_cond_destroy((&(_so)->timeo_cond)) 303 #define SOCK_COND(_so) (&(_so)->timeo_cond) 304 #endif 305 /*__Userspace__ SOCKBUF_LOCK(_sb) is now defined in netinet/sctp_process_lock.h */ 306 307 /* #define SOCKBUF_OWNED(_sb) mtx_owned(SOCKBUF_MTX(_sb)) unused */ 308 /*__Userspace__ SOCKBUF_UNLOCK(_sb) is now defined in netinet/sctp_process_lock.h */ 309 310 /*__Userspace__ SOCKBUF_LOCK_ASSERT(_sb) is now defined in netinet/sctp_process_lock.h */ 311 312 /* #define SOCKBUF_UNLOCK_ASSERT(_sb) mtx_assert(SOCKBUF_MTX(_sb), MA_NOTOWNED) unused */ 313 314 /* 315 * Per-socket mutex: we reuse the receive socket buffer mutex for space 316 * efficiency. This decision should probably be revisited as we optimize 317 * locking for the socket code. 318 */ 319 #define SOCK_MTX(_so) SOCKBUF_MTX(&(_so)->so_rcv) 320 /*__Userspace__ SOCK_LOCK(_so) is now defined in netinet/sctp_process_lock.h */ 321 322 /* #define SOCK_OWNED(_so) SOCKBUF_OWNED(&(_so)->so_rcv) unused */ 323 /*__Userspace__ SOCK_UNLOCK(_so) is now defined in netinet/sctp_process_lock.h */ 324 325 #define SOCK_LOCK_ASSERT(_so) SOCKBUF_LOCK_ASSERT(&(_so)->so_rcv) 326 327 /* 328 * Socket state bits. 329 * 330 * Historically, this bits were all kept in the so_state field. For 331 * locking reasons, they are now in multiple fields, as they are 332 * locked differently. so_state maintains basic socket state protected 333 * by the socket lock. so_qstate holds information about the socket 334 * accept queues. Each socket buffer also has a state field holding 335 * information relevant to that socket buffer (can't send, rcv). Many 336 * fields will be read without locks to improve performance and avoid 337 * lock order issues. However, this approach must be used with caution. 338 */ 339 #define SS_NOFDREF 0x0001 /* no file table ref any more */ 340 #define SS_ISCONNECTED 0x0002 /* socket connected to a peer */ 341 #define SS_ISCONNECTING 0x0004 /* in process of connecting to peer */ 342 #define SS_ISDISCONNECTING 0x0008 /* in process of disconnecting */ 343 #define SS_NBIO 0x0100 /* non-blocking ops */ 344 #define SS_ASYNC 0x0200 /* async i/o notify */ 345 #define SS_ISCONFIRMING 0x0400 /* deciding to accept connection req */ 346 #define SS_ISDISCONNECTED 0x2000 /* socket disconnected from peer */ 347 /* 348 * Protocols can mark a socket as SS_PROTOREF to indicate that, following 349 * pru_detach, they still want the socket to persist, and will free it 350 * themselves when they are done. Protocols should only ever call sofree() 351 * following setting this flag in pru_detach(), and never otherwise, as 352 * sofree() bypasses socket reference counting. 353 */ 354 #define SS_PROTOREF 0x4000 /* strong protocol reference */ 355 356 /* 357 * Socket state bits now stored in the socket buffer state field. 358 */ 359 #define SBS_CANTSENDMORE 0x0010 /* can't send more data to peer */ 360 #define SBS_CANTRCVMORE 0x0020 /* can't receive more data from peer */ 361 #define SBS_RCVATMARK 0x0040 /* at mark on input */ 362 363 /* 364 * Socket state bits stored in so_qstate. 365 */ 366 #define SQ_INCOMP 0x0800 /* unaccepted, incomplete connection */ 367 #define SQ_COMP 0x1000 /* unaccepted, complete connection */ 368 369 /* 370 * Socket event flags 371 */ 372 #define SCTP_EVENT_READ 0x0001 /* socket is readable */ 373 #define SCTP_EVENT_WRITE 0x0002 /* socket is writeable */ 374 #define SCTP_EVENT_ERROR 0x0004 /* socket has an error state */ 375 376 377 /*-------------------------------------------------------------*/ 378 /*-------------------------------------------------------------*/ 379 /* __Userspace__ */ 380 /*-------------------------------------------------------------*/ 381 /*-------------------------------------------------------------*/ 382 /* this new __Userspace__ section is to copy portions of the _KERNEL block 383 * above into, avoiding having to port the entire thing at once... 384 * For function prototypes, the full bodies are in user_socket.c . 385 */ 386 387 /* ---------------------------------------------------------- */ 388 /* --- function prototypes (implemented in user_socket.c) --- */ 389 /* ---------------------------------------------------------- */ 390 void soisconnecting(struct socket *so); 391 void soisdisconnecting(struct socket *so); 392 void soisconnected(struct socket *so); 393 struct socket * sonewconn(struct socket *head, int connstatus); 394 void socantrcvmore(struct socket *so); 395 void socantsendmore(struct socket *so); 396 void sofree(struct socket *so); 397 398 399 400 /* -------------- */ 401 /* --- macros --- */ 402 /* -------------- */ 403 404 #define soref(so) do { \ 405 SOCK_LOCK_ASSERT(so); \ 406 ++(so)->so_count; \ 407 } while (0) 408 409 #define sorele(so) do { \ 410 ACCEPT_LOCK_ASSERT(); \ 411 SOCK_LOCK_ASSERT(so); \ 412 KASSERT((so)->so_count > 0, ("sorele")); \ 413 if (--(so)->so_count == 0) \ 414 sofree(so); \ 415 else { \ 416 SOCK_UNLOCK(so); \ 417 ACCEPT_UNLOCK(); \ 418 } \ 419 } while (0) 420 421 422 /* replacing imin with min (user_environment.h) */ 423 #define sbspace(sb) \ 424 ((long) min((int)((sb)->sb_hiwat - (sb)->sb_cc), \ 425 (int)((sb)->sb_mbmax - (sb)->sb_mbcnt))) 426 427 /* do we have to send all at once on a socket? */ 428 #define sosendallatonce(so) \ 429 ((so)->so_proto->pr_flags & PR_ATOMIC) 430 431 /* can we read something from so? */ 432 #define soreadable(so) \ 433 ((int)((so)->so_rcv.sb_cc) >= (so)->so_rcv.sb_lowat || \ 434 ((so)->so_rcv.sb_state & SBS_CANTRCVMORE) || \ 435 !TAILQ_EMPTY(&(so)->so_comp) || (so)->so_error) 436 437 #if 0 /* original */ 438 #define PR_CONNREQUIRED 0x04 /* from sys/protosw.h "needed" for sowriteable */ 439 #define sowriteable(so) \ 440 ((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \ 441 (((so)->so_state&SS_ISCONNECTED) || \ 442 ((so)->so_proto->pr_flags&PR_CONNREQUIRED)==0)) || \ 443 ((so)->so_snd.sb_state & SBS_CANTSENDMORE) || \ 444 (so)->so_error) 445 #else /* line with PR_CONNREQUIRED removed */ 446 /* can we write something to so? */ 447 #define sowriteable(so) \ 448 ((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \ 449 (((so)->so_state&SS_ISCONNECTED))) || \ 450 ((so)->so_snd.sb_state & SBS_CANTSENDMORE) || \ 451 (so)->so_error) 452 #endif 453 454 extern void solisten_proto(struct socket *so, int backlog); 455 extern int solisten_proto_check(struct socket *so); 456 extern int sctp_listen(struct socket *so, int backlog, struct proc *p); 457 extern void socantrcvmore_locked(struct socket *so); 458 extern int sctp_bind(struct socket *so, struct sockaddr *addr); 459 extern int sctp6_bind(struct socket *so, struct sockaddr *addr, void *proc); 460 extern int sctpconn_bind(struct socket *so, struct sockaddr *addr); 461 extern int sctp_accept(struct socket *so, struct sockaddr **addr); 462 extern int sctp_attach(struct socket *so, int proto, uint32_t vrf_id); 463 extern int sctp6_attach(struct socket *so, int proto, uint32_t vrf_id); 464 extern int sctp_abort(struct socket *so); 465 extern int sctp6_abort(struct socket *so); 466 extern void sctp_close(struct socket *so); 467 extern int soaccept(struct socket *so, struct sockaddr **nam); 468 extern int solisten(struct socket *so, int backlog); 469 extern int soreserve(struct socket *so, u_long sndcc, u_long rcvcc); 470 extern void sowakeup(struct socket *so, struct sockbuf *sb); 471 extern void wakeup(void *ident, struct socket *so); /*__Userspace__ */ 472 extern int uiomove(void *cp, int n, struct uio *uio); 473 extern int sbwait(struct sockbuf *sb); 474 extern int sodisconnect(struct socket *so); 475 extern int soconnect(struct socket *so, struct sockaddr *nam); 476 extern int sctp_disconnect(struct socket *so); 477 extern int sctp_connect(struct socket *so, struct sockaddr *addr); 478 extern int sctp6_connect(struct socket *so, struct sockaddr *addr); 479 extern int sctpconn_connect(struct socket *so, struct sockaddr *addr); 480 extern void sctp_finish(void); 481 482 /* ------------------------------------------------ */ 483 /* ----- macros copied from above ---- */ 484 /* ------------------------------------------------ */ 485 486 /* 487 * Do we need to notify the other side when I/O is possible? 488 */ 489 #define sb_notify(sb) (((sb)->sb_flags & (SB_WAIT | SB_SEL | SB_ASYNC | \ 490 SB_UPCALL | SB_AIO | SB_KNOTE)) != 0) 491 492 493 /* 494 * In sorwakeup() and sowwakeup(), acquire the socket buffer lock to 495 * avoid a non-atomic test-and-wakeup. However, sowakeup is 496 * responsible for releasing the lock if it is called. We unlock only 497 * if we don't call into sowakeup. If any code is introduced that 498 * directly invokes the underlying sowakeup() primitives, it must 499 * maintain the same semantics. 500 */ 501 #define sorwakeup_locked(so) do { \ 502 SOCKBUF_LOCK_ASSERT(&(so)->so_rcv); \ 503 if (sb_notify(&(so)->so_rcv)) \ 504 sowakeup((so), &(so)->so_rcv); \ 505 else \ 506 SOCKBUF_UNLOCK(&(so)->so_rcv); \ 507 } while (0) 508 509 #define sorwakeup(so) do { \ 510 SOCKBUF_LOCK(&(so)->so_rcv); \ 511 sorwakeup_locked(so); \ 512 } while (0) 513 514 #define sowwakeup_locked(so) do { \ 515 SOCKBUF_LOCK_ASSERT(&(so)->so_snd); \ 516 if (sb_notify(&(so)->so_snd)) \ 517 sowakeup((so), &(so)->so_snd); \ 518 else \ 519 SOCKBUF_UNLOCK(&(so)->so_snd); \ 520 } while (0) 521 522 #define sowwakeup(so) do { \ 523 SOCKBUF_LOCK(&(so)->so_snd); \ 524 sowwakeup_locked(so); \ 525 } while (0) 526 527 #endif /* !_SYS_SOCKETVAR_H_ */ 528