socketvar.h revision 131017
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 * @(#)socketvar.h 8.3 (Berkeley) 2/19/95 30 * $FreeBSD: head/sys/sys/socketvar.h 131017 2004-06-24 02:57:12Z rwatson $ 31 */ 32 33#ifndef _SYS_SOCKETVAR_H_ 34#define _SYS_SOCKETVAR_H_ 35 36#include <sys/queue.h> /* for TAILQ macros */ 37#include <sys/selinfo.h> /* for struct selinfo */ 38#include <sys/_lock.h> 39#include <sys/_mutex.h> 40 41/* 42 * Kernel structure per socket. 43 * Contains send and receive buffer queues, 44 * handle on protocol and pointer to protocol 45 * private data and error information. 46 */ 47typedef u_quad_t so_gen_t; 48 49/*- 50 * Locking key to struct socket: 51 * (a) constant after allocation, no locking required. 52 * (b) locked by SOCK_LOCK(so). 53 * (c) locked by SOCKBUF_LOCK(&so->so_rcv). 54 * (d) locked by SOCKBUF_LOCK(&so->so_snd). 55 * (e) locked by ACCEPT_LOCK(). 56 * (f) not locked since integer reads/writes are atomic. 57 * (g) used only as a sleep/wakeup address, no value. 58 */ 59struct socket { 60 int so_count; /* (b) reference count */ 61 short so_type; /* (a) generic type, see socket.h */ 62 short so_options; /* from socket call, see socket.h */ 63 short so_linger; /* time to linger while closing */ 64 short so_state; /* (b) internal state flags SS_* */ 65 int so_qstate; /* (e) internal state flags SQ_* */ 66 void *so_pcb; /* protocol control block */ 67 struct protosw *so_proto; /* (a) protocol handle */ 68/* 69 * Variables for connection queuing. 70 * Socket where accepts occur is so_head in all subsidiary sockets. 71 * If so_head is 0, socket is not related to an accept. 72 * For head socket so_incomp queues partially completed connections, 73 * while so_comp is a queue of connections ready to be accepted. 74 * If a connection is aborted and it has so_head set, then 75 * it has to be pulled out of either so_incomp or so_comp. 76 * We allow connections to queue up based on current queue lengths 77 * and limit on number of queued connections for this socket. 78 */ 79 struct socket *so_head; /* (e) back pointer to accept socket */ 80 TAILQ_HEAD(, socket) so_incomp; /* (e) queue of partial unaccepted connections */ 81 TAILQ_HEAD(, socket) so_comp; /* (e) queue of complete unaccepted connections */ 82 TAILQ_ENTRY(socket) so_list; /* (e) list of unaccepted connections */ 83 short so_qlen; /* (e) number of unaccepted connections */ 84 short so_incqlen; /* (e) number of unaccepted incomplete 85 connections */ 86 short so_qlimit; /* (e) max number queued connections */ 87 short so_timeo; /* (g) connection timeout */ 88 u_short so_error; /* error affecting connection */ 89 struct sigio *so_sigio; /* [sg] information for async I/O or 90 out of band data (SIGURG) */ 91 u_long so_oobmark; /* (c) chars to oob mark */ 92 TAILQ_HEAD(, aiocblist) so_aiojobq; /* AIO ops waiting on socket */ 93/* 94 * Variables for socket buffering. 95 */ 96 struct sockbuf { 97 struct selinfo sb_sel; /* process selecting read/write */ 98 struct mtx sb_mtx; /* sockbuf lock */ 99#define sb_startzero sb_mb 100 struct mbuf *sb_mb; /* (c/d) the mbuf chain */ 101 struct mbuf *sb_mbtail; /* (c/d) the last mbuf in the chain */ 102 struct mbuf *sb_lastrecord; /* (c/d) first mbuf of last 103 * record in socket buffer */ 104 u_int sb_cc; /* (c/d) actual chars in buffer */ 105 u_int sb_hiwat; /* (c/d) max actual char count */ 106 u_int sb_mbcnt; /* (c/d) chars of mbufs used */ 107 u_int sb_mbmax; /* (c/d) max chars of mbufs to use */ 108 u_int sb_ctl; /* (c/d) non-data chars in buffer */ 109 int sb_lowat; /* (c/d) low water mark */ 110 int sb_timeo; /* (c/d) timeout for read/write */ 111 short sb_flags; /* (c/d) flags, see below */ 112 short sb_state; /* (c/d) socket state on sockbuf */ 113 } so_rcv, so_snd; 114/* 115 * Constants for sb_flags field of struct sockbuf. 116 */ 117#define SB_MAX (256*1024) /* default for max chars in sockbuf */ 118#define SB_LOCK 0x01 /* lock on data queue */ 119#define SB_WANT 0x02 /* someone is waiting to lock */ 120#define SB_WAIT 0x04 /* someone is waiting for data/space */ 121#define SB_SEL 0x08 /* someone is selecting */ 122#define SB_ASYNC 0x10 /* ASYNC I/O, need signals */ 123#define SB_UPCALL 0x20 /* someone wants an upcall */ 124#define SB_NOINTR 0x40 /* operations not interruptible */ 125#define SB_AIO 0x80 /* AIO operations queued */ 126#define SB_KNOTE 0x100 /* kernel note attached */ 127 128 void (*so_upcall)(struct socket *, void *, int); 129 void *so_upcallarg; 130 struct ucred *so_cred; /* (a) user credentials */ 131 struct label *so_label; /* (b) MAC label for socket */ 132 struct label *so_peerlabel; /* (b) cached MAC label for peer */ 133 /* NB: generation count must not be first; easiest to make it last. */ 134 so_gen_t so_gencnt; /* generation count */ 135 void *so_emuldata; /* private data for emulators */ 136 struct so_accf { 137 struct accept_filter *so_accept_filter; 138 void *so_accept_filter_arg; /* saved filter args */ 139 char *so_accept_filter_str; /* saved user args */ 140 } *so_accf; 141}; 142 143#define SB_EMPTY_FIXUP(sb) do { \ 144 if ((sb)->sb_mb == NULL) { \ 145 (sb)->sb_mbtail = NULL; \ 146 (sb)->sb_lastrecord = NULL; \ 147 } \ 148} while (/*CONSTCOND*/0) 149 150/* 151 * Global accept mutex to serialize access to accept queues and 152 * fields associated with multiple sockets. This allows us to 153 * avoid defining a lock order between listen and accept sockets 154 * until such time as it proves to be a good idea. 155 */ 156extern struct mtx accept_mtx; 157#define ACCEPT_LOCK() mtx_lock(&accept_mtx) 158#define ACCEPT_UNLOCK() mtx_unlock(&accept_mtx) 159 160/* 161 * Per-socket buffer mutex used to protect most fields in the socket 162 * buffer. 163 */ 164#define SOCKBUF_MTX(_sb) (&(_sb)->sb_mtx) 165#define SOCKBUF_LOCK_INIT(_sb, _name) \ 166 mtx_init(SOCKBUF_MTX(_sb), _name, NULL, MTX_DEF) 167#define SOCKBUF_LOCK_DESTROY(_sb) mtx_destroy(SOCKBUF_MTX(_sb)) 168#define SOCKBUF_LOCK(_sb) mtx_lock(SOCKBUF_MTX(_sb)) 169#define SOCKBUF_OWNED(_sb) mtx_owned(SOCKBUF_MTX(_sb)) 170#define SOCKBUF_UNLOCK(_sb) mtx_unlock(SOCKBUF_MTX(_sb)) 171#define SOCKBUF_LOCK_ASSERT(_sb) mtx_assert(SOCKBUF_MTX(_sb), MA_OWNED) 172 173/* 174 * Per-socket mutex: we reuse the receive socket buffer mutex for space 175 * efficiency. This decision should probably be revisited as we optimize 176 * locking for the socket code. 177 */ 178#define SOCK_MTX(_so) SOCKBUF_MTX(&(_so)->so_rcv) 179#define SOCK_LOCK(_so) SOCKBUF_LOCK(&(_so)->so_rcv) 180#define SOCK_OWNED(_so) SOCKBUF_OWNED(&(_so)->so_rcv) 181#define SOCK_UNLOCK(_so) SOCKBUF_UNLOCK(&(_so)->so_rcv) 182#define SOCK_LOCK_ASSERT(_so) SOCKBUF_LOCK_ASSERT(&(_so)->so_rcv) 183 184/* 185 * Socket state bits. 186 * 187 * Historically, this bits were all kept in the so_state field. For 188 * locking reasons, they are now in multiple fields, as they are 189 * locked differently. so_state maintains basic socket state protected 190 * by the socket lock. so_qstate holds information about the socket 191 * accept queues. Each socket buffer also has a state field holding 192 * information relevant to that socket buffer (can't send, rcv). Many 193 * fields will be read without locks to improve performance and avoid 194 * lock order issues. However, this approach must be used with caution. 195 */ 196#define SS_NOFDREF 0x0001 /* no file table ref any more */ 197#define SS_ISCONNECTED 0x0002 /* socket connected to a peer */ 198#define SS_ISCONNECTING 0x0004 /* in process of connecting to peer */ 199#define SS_ISDISCONNECTING 0x0008 /* in process of disconnecting */ 200#define SS_NBIO 0x0100 /* non-blocking ops */ 201#define SS_ASYNC 0x0200 /* async i/o notify */ 202#define SS_ISCONFIRMING 0x0400 /* deciding to accept connection req */ 203#define SS_ISDISCONNECTED 0x2000 /* socket disconnected from peer */ 204 205/* 206 * Socket state bits now stored in the socket buffer state field. 207 */ 208#define SBS_CANTSENDMORE 0x0010 /* can't send more data to peer */ 209#define SBS_CANTRCVMORE 0x0020 /* can't receive more data from peer */ 210#define SBS_RCVATMARK 0x0040 /* at mark on input */ 211 212/* 213 * Socket state bits stored in so_qstate. 214 */ 215#define SQ_INCOMP 0x0800 /* unaccepted, incomplete connection */ 216#define SQ_COMP 0x1000 /* unaccepted, complete connection */ 217 218/* 219 * Externalized form of struct socket used by the sysctl(3) interface. 220 */ 221struct xsocket { 222 size_t xso_len; /* length of this structure */ 223 struct socket *xso_so; /* makes a convenient handle sometimes */ 224 short so_type; 225 short so_options; 226 short so_linger; 227 short so_state; 228 caddr_t so_pcb; /* another convenient handle */ 229 int xso_protocol; 230 int xso_family; 231 short so_qlen; 232 short so_incqlen; 233 short so_qlimit; 234 short so_timeo; 235 u_short so_error; 236 pid_t so_pgid; 237 u_long so_oobmark; 238 struct xsockbuf { 239 u_int sb_cc; 240 u_int sb_hiwat; 241 u_int sb_mbcnt; 242 u_int sb_mbmax; 243 int sb_lowat; 244 int sb_timeo; 245 short sb_flags; 246 } so_rcv, so_snd; 247 uid_t so_uid; /* XXX */ 248}; 249 250#ifdef _KERNEL 251 252/* 253 * Macros for sockets and socket buffering. 254 */ 255 256/* 257 * Do we need to notify the other side when I/O is possible? 258 */ 259#define sb_notify(sb) (((sb)->sb_flags & (SB_WAIT | SB_SEL | SB_ASYNC | \ 260 SB_UPCALL | SB_AIO | SB_KNOTE)) != 0) 261 262/* 263 * How much space is there in a socket buffer (so->so_snd or so->so_rcv)? 264 * This is problematical if the fields are unsigned, as the space might 265 * still be negative (cc > hiwat or mbcnt > mbmax). Should detect 266 * overflow and return 0. Should use "lmin" but it doesn't exist now. 267 */ 268#define sbspace(sb) \ 269 ((long) imin((int)((sb)->sb_hiwat - (sb)->sb_cc), \ 270 (int)((sb)->sb_mbmax - (sb)->sb_mbcnt))) 271 272/* do we have to send all at once on a socket? */ 273#define sosendallatonce(so) \ 274 ((so)->so_proto->pr_flags & PR_ATOMIC) 275 276/* can we read something from so? */ 277#define soreadable(so) \ 278 ((so)->so_rcv.sb_cc >= (so)->so_rcv.sb_lowat || \ 279 ((so)->so_rcv.sb_state & SBS_CANTRCVMORE) || \ 280 !TAILQ_EMPTY(&(so)->so_comp) || (so)->so_error) 281 282/* can we write something to so? */ 283#define sowriteable(so) \ 284 ((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \ 285 (((so)->so_state&SS_ISCONNECTED) || \ 286 ((so)->so_proto->pr_flags&PR_CONNREQUIRED)==0)) || \ 287 ((so)->so_snd.sb_state & SBS_CANTSENDMORE) || \ 288 (so)->so_error) 289 290/* adjust counters in sb reflecting allocation of m */ 291#define sballoc(sb, m) { \ 292 (sb)->sb_cc += (m)->m_len; \ 293 if ((m)->m_type != MT_DATA && (m)->m_type != MT_HEADER && \ 294 (m)->m_type != MT_OOBDATA) \ 295 (sb)->sb_ctl += (m)->m_len; \ 296 (sb)->sb_mbcnt += MSIZE; \ 297 if ((m)->m_flags & M_EXT) \ 298 (sb)->sb_mbcnt += (m)->m_ext.ext_size; \ 299} 300 301/* adjust counters in sb reflecting freeing of m */ 302#define sbfree(sb, m) { \ 303 (sb)->sb_cc -= (m)->m_len; \ 304 if ((m)->m_type != MT_DATA && (m)->m_type != MT_HEADER && \ 305 (m)->m_type != MT_OOBDATA) \ 306 (sb)->sb_ctl -= (m)->m_len; \ 307 (sb)->sb_mbcnt -= MSIZE; \ 308 if ((m)->m_flags & M_EXT) \ 309 (sb)->sb_mbcnt -= (m)->m_ext.ext_size; \ 310} 311 312/* 313 * Set lock on sockbuf sb; sleep if lock is already held. 314 * Unless SB_NOINTR is set on sockbuf, sleep is interruptible. 315 * Returns error without lock if sleep is interrupted. 316 */ 317#define sblock(sb, wf) ((sb)->sb_flags & SB_LOCK ? \ 318 (((wf) == M_WAITOK) ? sb_lock(sb) : EWOULDBLOCK) : \ 319 ((sb)->sb_flags |= SB_LOCK), 0) 320 321/* release lock on sockbuf sb */ 322#define sbunlock(sb) do { \ 323 SOCKBUF_LOCK_ASSERT(sb); \ 324 (sb)->sb_flags &= ~SB_LOCK; \ 325 if ((sb)->sb_flags & SB_WANT) { \ 326 (sb)->sb_flags &= ~SB_WANT; \ 327 wakeup(&(sb)->sb_flags); \ 328 } \ 329} while (0) 330 331/* 332 * soref()/sorele() ref-count the socket structure. Note that you must 333 * still explicitly close the socket, but the last ref count will free 334 * the structure. 335 */ 336#define soref(so) do { \ 337 SOCK_LOCK_ASSERT(so); \ 338 ++(so)->so_count; \ 339} while (0) 340 341#define sorele(so) do { \ 342 SOCK_LOCK_ASSERT(so); \ 343 if ((so)->so_count <= 0) \ 344 panic("sorele"); \ 345 if (--(so)->so_count == 0) \ 346 sofree(so); \ 347 else \ 348 SOCK_UNLOCK(so); \ 349} while (0) 350 351#define sotryfree(so) do { \ 352 SOCK_LOCK_ASSERT(so); \ 353 if ((so)->so_count == 0) \ 354 sofree(so); \ 355 else \ 356 SOCK_UNLOCK(so); \ 357} while(0) 358 359/* 360 * In sorwakeup() and sowwakeup(), acquire the socket buffer lock to 361 * avoid a non-atomic test-and-wakeup. However, sowakeup is 362 * responsible for releasing the lock if it is called. We unlock only 363 * if we don't call into sowakeup. If any code is introduced that 364 * directly invokes the underlying sowakeup() primitives, it must 365 * maintain the same semantics. 366 */ 367#define sorwakeup_locked(so) do { \ 368 SOCKBUF_LOCK_ASSERT(&(so)->so_rcv); \ 369 if (sb_notify(&(so)->so_rcv)) \ 370 sowakeup((so), &(so)->so_rcv); \ 371 else \ 372 SOCKBUF_UNLOCK(&(so)->so_rcv); \ 373} while (0) 374 375#define sorwakeup(so) do { \ 376 SOCKBUF_LOCK(&(so)->so_rcv); \ 377 sorwakeup_locked(so); \ 378} while (0) 379 380#define sowwakeup_locked(so) do { \ 381 if (sb_notify(&(so)->so_snd)) \ 382 sowakeup((so), &(so)->so_snd); \ 383 else \ 384 SOCKBUF_UNLOCK(&(so)->so_snd); \ 385} while (0) 386 387#define sowwakeup(so) do { \ 388 SOCKBUF_LOCK(&(so)->so_snd); \ 389 sowwakeup_locked(so); \ 390} while (0) 391 392/* 393 * Argument structure for sosetopt et seq. This is in the KERNEL 394 * section because it will never be visible to user code. 395 */ 396enum sopt_dir { SOPT_GET, SOPT_SET }; 397struct sockopt { 398 enum sopt_dir sopt_dir; /* is this a get or a set? */ 399 int sopt_level; /* second arg of [gs]etsockopt */ 400 int sopt_name; /* third arg of [gs]etsockopt */ 401 void *sopt_val; /* fourth arg of [gs]etsockopt */ 402 size_t sopt_valsize; /* (almost) fifth arg of [gs]etsockopt */ 403 struct thread *sopt_td; /* calling thread or null if kernel */ 404}; 405 406struct accept_filter { 407 char accf_name[16]; 408 void (*accf_callback) 409 (struct socket *so, void *arg, int waitflag); 410 void * (*accf_create) 411 (struct socket *so, char *arg); 412 void (*accf_destroy) 413 (struct socket *so); 414 SLIST_ENTRY(accept_filter) accf_next; 415}; 416 417#ifdef MALLOC_DECLARE 418MALLOC_DECLARE(M_ACCF); 419MALLOC_DECLARE(M_PCB); 420MALLOC_DECLARE(M_SONAME); 421#endif 422 423extern int maxsockets; 424extern u_long sb_max; 425extern struct uma_zone *socket_zone; 426extern so_gen_t so_gencnt; 427 428struct mbuf; 429struct sockaddr; 430struct ucred; 431struct uio; 432 433/* 434 * From uipc_socket and friends 435 */ 436int sockargs(struct mbuf **mp, caddr_t buf, int buflen, int type); 437int getsockaddr(struct sockaddr **namp, caddr_t uaddr, size_t len); 438void sbappend(struct sockbuf *sb, struct mbuf *m); 439void sbappend_locked(struct sockbuf *sb, struct mbuf *m); 440void sbappendstream(struct sockbuf *sb, struct mbuf *m); 441void sbappendstream_locked(struct sockbuf *sb, struct mbuf *m); 442int sbappendaddr(struct sockbuf *sb, const struct sockaddr *asa, 443 struct mbuf *m0, struct mbuf *control); 444int sbappendaddr_locked(struct sockbuf *sb, const struct sockaddr *asa, 445 struct mbuf *m0, struct mbuf *control); 446int sbappendcontrol(struct sockbuf *sb, struct mbuf *m0, 447 struct mbuf *control); 448int sbappendcontrol_locked(struct sockbuf *sb, struct mbuf *m0, 449 struct mbuf *control); 450void sbappendrecord(struct sockbuf *sb, struct mbuf *m0); 451void sbappendrecord_locked(struct sockbuf *sb, struct mbuf *m0); 452void sbcheck(struct sockbuf *sb); 453void sbcompress(struct sockbuf *sb, struct mbuf *m, struct mbuf *n); 454struct mbuf * 455 sbcreatecontrol(caddr_t p, int size, int type, int level); 456void sbdrop(struct sockbuf *sb, int len); 457void sbdrop_locked(struct sockbuf *sb, int len); 458void sbdroprecord(struct sockbuf *sb); 459void sbdroprecord_locked(struct sockbuf *sb); 460void sbflush(struct sockbuf *sb); 461void sbflush_locked(struct sockbuf *sb); 462void sbinsertoob(struct sockbuf *sb, struct mbuf *m0); 463void sbinsertoob_locked(struct sockbuf *sb, struct mbuf *m0); 464void sbrelease(struct sockbuf *sb, struct socket *so); 465void sbrelease_locked(struct sockbuf *sb, struct socket *so); 466int sbreserve(struct sockbuf *sb, u_long cc, struct socket *so, 467 struct thread *td); 468int sbreserve_locked(struct sockbuf *sb, u_long cc, struct socket *so, 469 struct thread *td); 470void sbtoxsockbuf(struct sockbuf *sb, struct xsockbuf *xsb); 471int sbwait(struct sockbuf *sb); 472int sb_lock(struct sockbuf *sb); 473int soabort(struct socket *so); 474int soaccept(struct socket *so, struct sockaddr **nam); 475struct socket *soalloc(int mflags); 476int socheckuid(struct socket *so, uid_t uid); 477int sobind(struct socket *so, struct sockaddr *nam, struct thread *td); 478void socantrcvmore(struct socket *so); 479void socantrcvmore_locked(struct socket *so); 480void socantsendmore(struct socket *so); 481void socantsendmore_locked(struct socket *so); 482int soclose(struct socket *so); 483int soconnect(struct socket *so, struct sockaddr *nam, struct thread *td); 484int soconnect2(struct socket *so1, struct socket *so2); 485int socow_setup(struct mbuf *m0, struct uio *uio); 486int socreate(int dom, struct socket **aso, int type, int proto, 487 struct ucred *cred, struct thread *td); 488void sodealloc(struct socket *so); 489int sodisconnect(struct socket *so); 490struct sockaddr *sodupsockaddr(const struct sockaddr *sa, int mflags); 491void sofree(struct socket *so); 492int sogetopt(struct socket *so, struct sockopt *sopt); 493void sohasoutofband(struct socket *so); 494void soisconnected(struct socket *so); 495void soisconnecting(struct socket *so); 496void soisdisconnected(struct socket *so); 497void soisdisconnecting(struct socket *so); 498int solisten(struct socket *so, int backlog, struct thread *td); 499struct socket * 500 sonewconn(struct socket *head, int connstatus); 501int sooptcopyin(struct sockopt *sopt, void *buf, size_t len, size_t minlen); 502int sooptcopyout(struct sockopt *sopt, const void *buf, size_t len); 503 504/* XXX; prepare mbuf for (__FreeBSD__ < 3) routines. */ 505int soopt_getm(struct sockopt *sopt, struct mbuf **mp); 506int soopt_mcopyin(struct sockopt *sopt, struct mbuf *m); 507int soopt_mcopyout(struct sockopt *sopt, struct mbuf *m); 508 509int sopoll(struct socket *so, int events, struct ucred *active_cred, 510 struct thread *td); 511int soreceive(struct socket *so, struct sockaddr **paddr, struct uio *uio, 512 struct mbuf **mp0, struct mbuf **controlp, int *flagsp); 513int soreserve(struct socket *so, u_long sndcc, u_long rcvcc); 514void sorflush(struct socket *so); 515int sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, 516 struct mbuf *top, struct mbuf *control, int flags, 517 struct thread *td); 518int sosetopt(struct socket *so, struct sockopt *sopt); 519int soshutdown(struct socket *so, int how); 520void sotoxsocket(struct socket *so, struct xsocket *xso); 521void sowakeup(struct socket *so, struct sockbuf *sb); 522 523#ifdef SOCKBUF_DEBUG 524void sblastrecordchk(struct sockbuf *, const char *, int); 525#define SBLASTRECORDCHK(sb) sblastrecordchk((sb), __FILE__, __LINE__) 526 527void sblastmbufchk(struct sockbuf *, const char *, int); 528#define SBLASTMBUFCHK(sb) sblastmbufchk((sb), __FILE__, __LINE__) 529#else 530#define SBLASTRECORDCHK(sb) /* nothing */ 531#define SBLASTMBUFCHK(sb) /* nothing */ 532#endif /* SOCKBUF_DEBUG */ 533 534/* 535 * Accept filter functions (duh). 536 */ 537int accept_filt_add(struct accept_filter *filt); 538int accept_filt_del(char *name); 539struct accept_filter *accept_filt_get(char *name); 540#ifdef ACCEPT_FILTER_MOD 541#ifdef SYSCTL_DECL 542SYSCTL_DECL(_net_inet_accf); 543#endif 544int accept_filt_generic_mod_event(module_t mod, int event, void *data); 545#endif 546 547#endif /* _KERNEL */ 548 549#endif /* !_SYS_SOCKETVAR_H_ */ 550