socketvar.h revision 142190
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 142190 2005-02-21 21:58:17Z 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 * (h) locked by global mutex so_global_mtx. 59 */ 60struct socket { 61 int so_count; /* (b) reference count */ 62 short so_type; /* (a) generic type, see socket.h */ 63 short so_options; /* from socket call, see socket.h */ 64 short so_linger; /* time to linger while closing */ 65 short so_state; /* (b) internal state flags SS_* */ 66 int so_qstate; /* (e) internal state flags SQ_* */ 67 void *so_pcb; /* protocol control block */ 68 struct protosw *so_proto; /* (a) protocol handle */ 69/* 70 * Variables for connection queuing. 71 * Socket where accepts occur is so_head in all subsidiary sockets. 72 * If so_head is 0, socket is not related to an accept. 73 * For head socket so_incomp queues partially completed connections, 74 * while so_comp is a queue of connections ready to be accepted. 75 * If a connection is aborted and it has so_head set, then 76 * it has to be pulled out of either so_incomp or so_comp. 77 * We allow connections to queue up based on current queue lengths 78 * and limit on number of queued connections for this socket. 79 */ 80 struct socket *so_head; /* (e) back pointer to accept socket */ 81 TAILQ_HEAD(, socket) so_incomp; /* (e) queue of partial unaccepted connections */ 82 TAILQ_HEAD(, socket) so_comp; /* (e) queue of complete unaccepted connections */ 83 TAILQ_ENTRY(socket) so_list; /* (e) list of unaccepted connections */ 84 u_short so_qlen; /* (e) number of unaccepted connections */ 85 u_short so_incqlen; /* (e) number of unaccepted incomplete 86 connections */ 87 u_short so_qlimit; /* (e) max number queued connections */ 88 short so_timeo; /* (g) connection timeout */ 89 u_short so_error; /* (f) error affecting connection */ 90 struct sigio *so_sigio; /* [sg] information for async I/O or 91 out of band data (SIGURG) */ 92 u_long so_oobmark; /* (c) chars to oob mark */ 93 TAILQ_HEAD(, aiocblist) so_aiojobq; /* AIO ops waiting on socket */ 94/* 95 * Variables for socket buffering. 96 */ 97 struct sockbuf { 98 struct selinfo sb_sel; /* process selecting read/write */ 99 struct mtx sb_mtx; /* sockbuf lock */ 100 short sb_state; /* (c/d) socket state on sockbuf */ 101#define sb_startzero sb_mb 102 struct mbuf *sb_mb; /* (c/d) the mbuf chain */ 103 struct mbuf *sb_mbtail; /* (c/d) the last mbuf in the chain */ 104 struct mbuf *sb_lastrecord; /* (c/d) first mbuf of last 105 * record in socket buffer */ 106 u_int sb_cc; /* (c/d) actual chars in buffer */ 107 u_int sb_hiwat; /* (c/d) max actual char count */ 108 u_int sb_mbcnt; /* (c/d) chars of mbufs used */ 109 u_int sb_mbmax; /* (c/d) max chars of mbufs to use */ 110 u_int sb_ctl; /* (c/d) non-data chars in buffer */ 111 int sb_lowat; /* (c/d) low water mark */ 112 int sb_timeo; /* (c/d) timeout for read/write */ 113 short sb_flags; /* (c/d) flags, see below */ 114 } so_rcv, so_snd; 115/* 116 * Constants for sb_flags field of struct sockbuf. 117 */ 118#define SB_MAX (256*1024) /* default for max chars in sockbuf */ 119/* 120 * Constants for sb_flags field of struct sockbuf. 121 */ 122#define SB_LOCK 0x01 /* lock on data queue */ 123#define SB_WANT 0x02 /* someone is waiting to lock */ 124#define SB_WAIT 0x04 /* someone is waiting for data/space */ 125#define SB_SEL 0x08 /* someone is selecting */ 126#define SB_ASYNC 0x10 /* ASYNC I/O, need signals */ 127#define SB_UPCALL 0x20 /* someone wants an upcall */ 128#define SB_NOINTR 0x40 /* operations not interruptible */ 129#define SB_AIO 0x80 /* AIO operations queued */ 130#define SB_KNOTE 0x100 /* kernel note attached */ 131 132 void (*so_upcall)(struct socket *, void *, int); 133 void *so_upcallarg; 134 struct ucred *so_cred; /* (a) user credentials */ 135 struct label *so_label; /* (b) MAC label for socket */ 136 struct label *so_peerlabel; /* (b) cached MAC label for peer */ 137 /* NB: generation count must not be first; easiest to make it last. */ 138 so_gen_t so_gencnt; /* (h) generation count */ 139 void *so_emuldata; /* private data for emulators */ 140 struct so_accf { 141 struct accept_filter *so_accept_filter; 142 void *so_accept_filter_arg; /* saved filter args */ 143 char *so_accept_filter_str; /* saved user args */ 144 } *so_accf; 145}; 146 147#define SB_EMPTY_FIXUP(sb) do { \ 148 if ((sb)->sb_mb == NULL) { \ 149 (sb)->sb_mbtail = NULL; \ 150 (sb)->sb_lastrecord = NULL; \ 151 } \ 152} while (/*CONSTCOND*/0) 153 154/* 155 * Global accept mutex to serialize access to accept queues and 156 * fields associated with multiple sockets. This allows us to 157 * avoid defining a lock order between listen and accept sockets 158 * until such time as it proves to be a good idea. 159 */ 160extern struct mtx accept_mtx; 161#define ACCEPT_LOCK_ASSERT() mtx_assert(&accept_mtx, MA_OWNED) 162#define ACCEPT_UNLOCK_ASSERT() mtx_assert(&accept_mtx, MA_NOTOWNED) 163#define ACCEPT_LOCK() mtx_lock(&accept_mtx) 164#define ACCEPT_UNLOCK() mtx_unlock(&accept_mtx) 165 166/* 167 * Per-socket buffer mutex used to protect most fields in the socket 168 * buffer. 169 */ 170#define SOCKBUF_MTX(_sb) (&(_sb)->sb_mtx) 171#define SOCKBUF_LOCK_INIT(_sb, _name) \ 172 mtx_init(SOCKBUF_MTX(_sb), _name, NULL, MTX_DEF) 173#define SOCKBUF_LOCK_DESTROY(_sb) mtx_destroy(SOCKBUF_MTX(_sb)) 174#define SOCKBUF_LOCK(_sb) mtx_lock(SOCKBUF_MTX(_sb)) 175#define SOCKBUF_OWNED(_sb) mtx_owned(SOCKBUF_MTX(_sb)) 176#define SOCKBUF_UNLOCK(_sb) mtx_unlock(SOCKBUF_MTX(_sb)) 177#define SOCKBUF_LOCK_ASSERT(_sb) mtx_assert(SOCKBUF_MTX(_sb), MA_OWNED) 178#define SOCKBUF_UNLOCK_ASSERT(_sb) mtx_assert(SOCKBUF_MTX(_sb), MA_NOTOWNED) 179 180/* 181 * Per-socket mutex: we reuse the receive socket buffer mutex for space 182 * efficiency. This decision should probably be revisited as we optimize 183 * locking for the socket code. 184 */ 185#define SOCK_MTX(_so) SOCKBUF_MTX(&(_so)->so_rcv) 186#define SOCK_LOCK(_so) SOCKBUF_LOCK(&(_so)->so_rcv) 187#define SOCK_OWNED(_so) SOCKBUF_OWNED(&(_so)->so_rcv) 188#define SOCK_UNLOCK(_so) SOCKBUF_UNLOCK(&(_so)->so_rcv) 189#define SOCK_LOCK_ASSERT(_so) SOCKBUF_LOCK_ASSERT(&(_so)->so_rcv) 190 191/* 192 * Socket state bits. 193 * 194 * Historically, this bits were all kept in the so_state field. For 195 * locking reasons, they are now in multiple fields, as they are 196 * locked differently. so_state maintains basic socket state protected 197 * by the socket lock. so_qstate holds information about the socket 198 * accept queues. Each socket buffer also has a state field holding 199 * information relevant to that socket buffer (can't send, rcv). Many 200 * fields will be read without locks to improve performance and avoid 201 * lock order issues. However, this approach must be used with caution. 202 */ 203#define SS_NOFDREF 0x0001 /* no file table ref any more */ 204#define SS_ISCONNECTED 0x0002 /* socket connected to a peer */ 205#define SS_ISCONNECTING 0x0004 /* in process of connecting to peer */ 206#define SS_ISDISCONNECTING 0x0008 /* in process of disconnecting */ 207#define SS_NBIO 0x0100 /* non-blocking ops */ 208#define SS_ASYNC 0x0200 /* async i/o notify */ 209#define SS_ISCONFIRMING 0x0400 /* deciding to accept connection req */ 210#define SS_ISDISCONNECTED 0x2000 /* socket disconnected from peer */ 211 212/* 213 * Socket state bits now stored in the socket buffer state field. 214 */ 215#define SBS_CANTSENDMORE 0x0010 /* can't send more data to peer */ 216#define SBS_CANTRCVMORE 0x0020 /* can't receive more data from peer */ 217#define SBS_RCVATMARK 0x0040 /* at mark on input */ 218 219/* 220 * Socket state bits stored in so_qstate. 221 */ 222#define SQ_INCOMP 0x0800 /* unaccepted, incomplete connection */ 223#define SQ_COMP 0x1000 /* unaccepted, complete connection */ 224 225/* 226 * Externalized form of struct socket used by the sysctl(3) interface. 227 */ 228struct xsocket { 229 size_t xso_len; /* length of this structure */ 230 struct socket *xso_so; /* makes a convenient handle sometimes */ 231 short so_type; 232 short so_options; 233 short so_linger; 234 short so_state; 235 caddr_t so_pcb; /* another convenient handle */ 236 int xso_protocol; 237 int xso_family; 238 u_short so_qlen; 239 u_short so_incqlen; 240 u_short so_qlimit; 241 short so_timeo; 242 u_short so_error; 243 pid_t so_pgid; 244 u_long so_oobmark; 245 struct xsockbuf { 246 u_int sb_cc; 247 u_int sb_hiwat; 248 u_int sb_mbcnt; 249 u_int sb_mbmax; 250 int sb_lowat; 251 int sb_timeo; 252 short sb_flags; 253 } so_rcv, so_snd; 254 uid_t so_uid; /* XXX */ 255}; 256 257#ifdef _KERNEL 258 259/* 260 * Macros for sockets and socket buffering. 261 */ 262 263/* 264 * Do we need to notify the other side when I/O is possible? 265 */ 266#define sb_notify(sb) (((sb)->sb_flags & (SB_WAIT | SB_SEL | SB_ASYNC | \ 267 SB_UPCALL | SB_AIO | SB_KNOTE)) != 0) 268 269/* 270 * How much space is there in a socket buffer (so->so_snd or so->so_rcv)? 271 * This is problematical if the fields are unsigned, as the space might 272 * still be negative (cc > hiwat or mbcnt > mbmax). Should detect 273 * overflow and return 0. Should use "lmin" but it doesn't exist now. 274 */ 275#define sbspace(sb) \ 276 ((long) imin((int)((sb)->sb_hiwat - (sb)->sb_cc), \ 277 (int)((sb)->sb_mbmax - (sb)->sb_mbcnt))) 278 279/* do we have to send all at once on a socket? */ 280#define sosendallatonce(so) \ 281 ((so)->so_proto->pr_flags & PR_ATOMIC) 282 283/* can we read something from so? */ 284#define soreadable(so) \ 285 ((so)->so_rcv.sb_cc >= (so)->so_rcv.sb_lowat || \ 286 ((so)->so_rcv.sb_state & SBS_CANTRCVMORE) || \ 287 !TAILQ_EMPTY(&(so)->so_comp) || (so)->so_error) 288 289/* can we write something to so? */ 290#define sowriteable(so) \ 291 ((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \ 292 (((so)->so_state&SS_ISCONNECTED) || \ 293 ((so)->so_proto->pr_flags&PR_CONNREQUIRED)==0)) || \ 294 ((so)->so_snd.sb_state & SBS_CANTSENDMORE) || \ 295 (so)->so_error) 296 297/* adjust counters in sb reflecting allocation of m */ 298#define sballoc(sb, m) { \ 299 (sb)->sb_cc += (m)->m_len; \ 300 if ((m)->m_type != MT_DATA && (m)->m_type != MT_HEADER && \ 301 (m)->m_type != MT_OOBDATA) \ 302 (sb)->sb_ctl += (m)->m_len; \ 303 (sb)->sb_mbcnt += MSIZE; \ 304 if ((m)->m_flags & M_EXT) \ 305 (sb)->sb_mbcnt += (m)->m_ext.ext_size; \ 306} 307 308/* adjust counters in sb reflecting freeing of m */ 309#define sbfree(sb, m) { \ 310 (sb)->sb_cc -= (m)->m_len; \ 311 if ((m)->m_type != MT_DATA && (m)->m_type != MT_HEADER && \ 312 (m)->m_type != MT_OOBDATA) \ 313 (sb)->sb_ctl -= (m)->m_len; \ 314 (sb)->sb_mbcnt -= MSIZE; \ 315 if ((m)->m_flags & M_EXT) \ 316 (sb)->sb_mbcnt -= (m)->m_ext.ext_size; \ 317} 318 319/* 320 * Set lock on sockbuf sb; sleep if lock is already held. 321 * Unless SB_NOINTR is set on sockbuf, sleep is interruptible. 322 * Returns error without lock if sleep is interrupted. 323 */ 324#define sblock(sb, wf) ((sb)->sb_flags & SB_LOCK ? \ 325 (((wf) == M_WAITOK) ? sb_lock(sb) : EWOULDBLOCK) : \ 326 ((sb)->sb_flags |= SB_LOCK), 0) 327 328/* release lock on sockbuf sb */ 329#define sbunlock(sb) do { \ 330 SOCKBUF_LOCK_ASSERT(sb); \ 331 (sb)->sb_flags &= ~SB_LOCK; \ 332 if ((sb)->sb_flags & SB_WANT) { \ 333 (sb)->sb_flags &= ~SB_WANT; \ 334 wakeup(&(sb)->sb_flags); \ 335 } \ 336} while (0) 337 338/* 339 * soref()/sorele() ref-count the socket structure. Note that you must 340 * still explicitly close the socket, but the last ref count will free 341 * the structure. 342 */ 343#define soref(so) do { \ 344 SOCK_LOCK_ASSERT(so); \ 345 ++(so)->so_count; \ 346} while (0) 347 348#define sorele(so) do { \ 349 ACCEPT_LOCK_ASSERT(); \ 350 SOCK_LOCK_ASSERT(so); \ 351 if ((so)->so_count <= 0) \ 352 panic("sorele"); \ 353 if (--(so)->so_count == 0) \ 354 sofree(so); \ 355 else { \ 356 SOCK_UNLOCK(so); \ 357 ACCEPT_UNLOCK(); \ 358 } \ 359} while (0) 360 361#define sotryfree(so) do { \ 362 ACCEPT_LOCK_ASSERT(); \ 363 SOCK_LOCK_ASSERT(so); \ 364 if ((so)->so_count == 0) \ 365 sofree(so); \ 366 else { \ 367 SOCK_UNLOCK(so); \ 368 ACCEPT_UNLOCK(); \ 369 } \ 370} while(0) 371 372/* 373 * In sorwakeup() and sowwakeup(), acquire the socket buffer lock to 374 * avoid a non-atomic test-and-wakeup. However, sowakeup is 375 * responsible for releasing the lock if it is called. We unlock only 376 * if we don't call into sowakeup. If any code is introduced that 377 * directly invokes the underlying sowakeup() primitives, it must 378 * maintain the same semantics. 379 */ 380#define sorwakeup_locked(so) do { \ 381 SOCKBUF_LOCK_ASSERT(&(so)->so_rcv); \ 382 if (sb_notify(&(so)->so_rcv)) \ 383 sowakeup((so), &(so)->so_rcv); \ 384 else \ 385 SOCKBUF_UNLOCK(&(so)->so_rcv); \ 386} while (0) 387 388#define sorwakeup(so) do { \ 389 SOCKBUF_LOCK(&(so)->so_rcv); \ 390 sorwakeup_locked(so); \ 391} while (0) 392 393#define sowwakeup_locked(so) do { \ 394 SOCKBUF_LOCK_ASSERT(&(so)->so_snd); \ 395 if (sb_notify(&(so)->so_snd)) \ 396 sowakeup((so), &(so)->so_snd); \ 397 else \ 398 SOCKBUF_UNLOCK(&(so)->so_snd); \ 399} while (0) 400 401#define sowwakeup(so) do { \ 402 SOCKBUF_LOCK(&(so)->so_snd); \ 403 sowwakeup_locked(so); \ 404} while (0) 405 406/* 407 * Argument structure for sosetopt et seq. This is in the KERNEL 408 * section because it will never be visible to user code. 409 */ 410enum sopt_dir { SOPT_GET, SOPT_SET }; 411struct sockopt { 412 enum sopt_dir sopt_dir; /* is this a get or a set? */ 413 int sopt_level; /* second arg of [gs]etsockopt */ 414 int sopt_name; /* third arg of [gs]etsockopt */ 415 void *sopt_val; /* fourth arg of [gs]etsockopt */ 416 size_t sopt_valsize; /* (almost) fifth arg of [gs]etsockopt */ 417 struct thread *sopt_td; /* calling thread or null if kernel */ 418}; 419 420struct accept_filter { 421 char accf_name[16]; 422 void (*accf_callback) 423 (struct socket *so, void *arg, int waitflag); 424 void * (*accf_create) 425 (struct socket *so, char *arg); 426 void (*accf_destroy) 427 (struct socket *so); 428 SLIST_ENTRY(accept_filter) accf_next; 429}; 430 431#ifdef MALLOC_DECLARE 432MALLOC_DECLARE(M_ACCF); 433MALLOC_DECLARE(M_PCB); 434MALLOC_DECLARE(M_SONAME); 435#endif 436 437extern int maxsockets; 438extern u_long sb_max; 439extern struct uma_zone *socket_zone; 440extern so_gen_t so_gencnt; 441 442struct mbuf; 443struct sockaddr; 444struct ucred; 445struct uio; 446 447/* 448 * From uipc_socket and friends 449 */ 450int do_setopt_accept_filter(struct socket *so, struct sockopt *sopt); 451int so_setsockopt(struct socket *so, int level, int optname, 452 void *optval, size_t optlen); 453int sockargs(struct mbuf **mp, caddr_t buf, int buflen, int type); 454int getsockaddr(struct sockaddr **namp, caddr_t uaddr, size_t len); 455void sbappend(struct sockbuf *sb, struct mbuf *m); 456void sbappend_locked(struct sockbuf *sb, struct mbuf *m); 457void sbappendstream(struct sockbuf *sb, struct mbuf *m); 458void sbappendstream_locked(struct sockbuf *sb, struct mbuf *m); 459int sbappendaddr(struct sockbuf *sb, const struct sockaddr *asa, 460 struct mbuf *m0, struct mbuf *control); 461int sbappendaddr_locked(struct sockbuf *sb, const struct sockaddr *asa, 462 struct mbuf *m0, struct mbuf *control); 463int sbappendcontrol(struct sockbuf *sb, struct mbuf *m0, 464 struct mbuf *control); 465int sbappendcontrol_locked(struct sockbuf *sb, struct mbuf *m0, 466 struct mbuf *control); 467void sbappendrecord(struct sockbuf *sb, struct mbuf *m0); 468void sbappendrecord_locked(struct sockbuf *sb, struct mbuf *m0); 469void sbcheck(struct sockbuf *sb); 470void sbcompress(struct sockbuf *sb, struct mbuf *m, struct mbuf *n); 471struct mbuf * 472 sbcreatecontrol(caddr_t p, int size, int type, int level); 473void sbdrop(struct sockbuf *sb, int len); 474void sbdrop_locked(struct sockbuf *sb, int len); 475void sbdroprecord(struct sockbuf *sb); 476void sbdroprecord_locked(struct sockbuf *sb); 477void sbflush(struct sockbuf *sb); 478void sbflush_locked(struct sockbuf *sb); 479void sbinsertoob(struct sockbuf *sb, struct mbuf *m0); 480void sbinsertoob_locked(struct sockbuf *sb, struct mbuf *m0); 481void sbrelease(struct sockbuf *sb, struct socket *so); 482void sbrelease_locked(struct sockbuf *sb, struct socket *so); 483int sbreserve(struct sockbuf *sb, u_long cc, struct socket *so, 484 struct thread *td); 485int sbreserve_locked(struct sockbuf *sb, u_long cc, struct socket *so, 486 struct thread *td); 487void sbtoxsockbuf(struct sockbuf *sb, struct xsockbuf *xsb); 488int sbwait(struct sockbuf *sb); 489int sb_lock(struct sockbuf *sb); 490int soabort(struct socket *so); 491int soaccept(struct socket *so, struct sockaddr **nam); 492struct socket *soalloc(int mflags); 493int socheckuid(struct socket *so, uid_t uid); 494int sobind(struct socket *so, struct sockaddr *nam, struct thread *td); 495void socantrcvmore(struct socket *so); 496void socantrcvmore_locked(struct socket *so); 497void socantsendmore(struct socket *so); 498void socantsendmore_locked(struct socket *so); 499int soclose(struct socket *so); 500int soconnect(struct socket *so, struct sockaddr *nam, struct thread *td); 501int soconnect2(struct socket *so1, struct socket *so2); 502int socow_setup(struct mbuf *m0, struct uio *uio); 503int socreate(int dom, struct socket **aso, int type, int proto, 504 struct ucred *cred, struct thread *td); 505void sodealloc(struct socket *so); 506int sodisconnect(struct socket *so); 507struct sockaddr *sodupsockaddr(const struct sockaddr *sa, int mflags); 508void sofree(struct socket *so); 509int sogetopt(struct socket *so, struct sockopt *sopt); 510void sohasoutofband(struct socket *so); 511void soisconnected(struct socket *so); 512void soisconnecting(struct socket *so); 513void soisdisconnected(struct socket *so); 514void soisdisconnecting(struct socket *so); 515int solisten(struct socket *so, int backlog, struct thread *td); 516void solisten_proto(struct socket *so); 517int solisten_proto_check(struct socket *so); 518struct socket * 519 sonewconn(struct socket *head, int connstatus); 520int sooptcopyin(struct sockopt *sopt, void *buf, size_t len, size_t minlen); 521int sooptcopyout(struct sockopt *sopt, const void *buf, size_t len); 522 523/* XXX; prepare mbuf for (__FreeBSD__ < 3) routines. */ 524int soopt_getm(struct sockopt *sopt, struct mbuf **mp); 525int soopt_mcopyin(struct sockopt *sopt, struct mbuf *m); 526int soopt_mcopyout(struct sockopt *sopt, struct mbuf *m); 527 528int sopoll(struct socket *so, int events, struct ucred *active_cred, 529 struct thread *td); 530int soreceive(struct socket *so, struct sockaddr **paddr, struct uio *uio, 531 struct mbuf **mp0, struct mbuf **controlp, int *flagsp); 532int soreserve(struct socket *so, u_long sndcc, u_long rcvcc); 533void sorflush(struct socket *so); 534int sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, 535 struct mbuf *top, struct mbuf *control, int flags, 536 struct thread *td); 537int sosetopt(struct socket *so, struct sockopt *sopt); 538int soshutdown(struct socket *so, int how); 539void sotoxsocket(struct socket *so, struct xsocket *xso); 540void sowakeup(struct socket *so, struct sockbuf *sb); 541 542#ifdef SOCKBUF_DEBUG 543void sblastrecordchk(struct sockbuf *, const char *, int); 544#define SBLASTRECORDCHK(sb) sblastrecordchk((sb), __FILE__, __LINE__) 545 546void sblastmbufchk(struct sockbuf *, const char *, int); 547#define SBLASTMBUFCHK(sb) sblastmbufchk((sb), __FILE__, __LINE__) 548#else 549#define SBLASTRECORDCHK(sb) /* nothing */ 550#define SBLASTMBUFCHK(sb) /* nothing */ 551#endif /* SOCKBUF_DEBUG */ 552 553/* 554 * Accept filter functions (duh). 555 */ 556int accept_filt_add(struct accept_filter *filt); 557int accept_filt_del(char *name); 558struct accept_filter *accept_filt_get(char *name); 559#ifdef ACCEPT_FILTER_MOD 560#ifdef SYSCTL_DECL 561SYSCTL_DECL(_net_inet_accf); 562#endif 563int accept_filt_generic_mod_event(module_t mod, int event, void *data); 564#endif 565 566#endif /* _KERNEL */ 567 568#endif /* !_SYS_SOCKETVAR_H_ */ 569