Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sys/socketvar.h
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1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)socketvar.h 8.3 (Berkeley) 2/19/95 32 * 33 * $FreeBSD$ 34 */ 35 36 #ifndef _SYS_SOCKETVAR_H_ 37 #define _SYS_SOCKETVAR_H_ 38 39 /* 40 * Socket generation count type. Also used in xinpcb, xtcpcb, xunpcb. 41 */ 42 typedef uint64_t so_gen_t; 43 44 #if defined(_KERNEL) || defined(_WANT_SOCKET) 45 #include <sys/queue.h> /* for TAILQ macros */ 46 #include <sys/selinfo.h> /* for struct selinfo */ 47 #include <sys/_lock.h> 48 #include <sys/_mutex.h> 49 #include <sys/osd.h> 50 #include <sys/_sx.h> 51 #include <sys/sockbuf.h> 52 #ifdef _KERNEL 53 #include <sys/caprights.h> 54 #include <sys/sockopt.h> 55 #endif 56 57 struct vnet; 58 59 /* 60 * Kernel structure per socket. 61 * Contains send and receive buffer queues, 62 * handle on protocol and pointer to protocol 63 * private data and error information. 64 */ 65 typedef int so_upcall_t(struct socket *, void *, int); 66 typedef void so_dtor_t(struct socket *); 67 68 struct socket; 69 70 enum socket_qstate { 71 SQ_NONE = 0, 72 SQ_INCOMP = 0x0800, /* on sol_incomp */ 73 SQ_COMP = 0x1000, /* on sol_comp */ 74 }; 75 76 /*- 77 * Locking key to struct socket: 78 * (a) constant after allocation, no locking required. 79 * (b) locked by SOCK_LOCK(so). 80 * (cr) locked by SOCK_RECVBUF_LOCK(so) 81 * (cs) locked by SOCK_SENDBUF_LOCK(so) 82 * (e) locked by SOLISTEN_LOCK() of corresponding listening socket. 83 * (f) not locked since integer reads/writes are atomic. 84 * (g) used only as a sleep/wakeup address, no value. 85 * (h) locked by global mutex so_global_mtx. 86 * (k) locked by KTLS workqueue mutex 87 */ 88 TAILQ_HEAD(accept_queue, socket); 89 struct socket { 90 struct mtx so_lock; 91 volatile u_int so_count; /* (b / refcount) */ 92 struct selinfo so_rdsel; /* (b/cr) for so_rcv/so_comp */ 93 struct selinfo so_wrsel; /* (b/cs) for so_snd */ 94 int so_options; /* (b) from socket call, see socket.h */ 95 short so_type; /* (a) generic type, see socket.h */ 96 short so_state; /* (b) internal state flags SS_* */ 97 void *so_pcb; /* protocol control block */ 98 struct vnet *so_vnet; /* (a) network stack instance */ 99 struct protosw *so_proto; /* (a) protocol handle */ 100 short so_linger; /* time to linger close(2) */ 101 short so_timeo; /* (g) connection timeout */ 102 u_short so_error; /* (f) error affecting connection */ 103 u_short so_rerror; /* (f) error affecting connection */ 104 struct sigio *so_sigio; /* [sg] information for async I/O or 105 out of band data (SIGURG) */ 106 struct ucred *so_cred; /* (a) user credentials */ 107 struct label *so_label; /* (b) MAC label for socket */ 108 /* NB: generation count must not be first. */ 109 so_gen_t so_gencnt; /* (h) generation count */ 110 void *so_emuldata; /* (b) private data for emulators */ 111 so_dtor_t *so_dtor; /* (b) optional destructor */ 112 struct osd osd; /* Object Specific extensions */ 113 /* 114 * so_fibnum, so_user_cookie and friends can be used to attach 115 * some user-specified metadata to a socket, which then can be 116 * used by the kernel for various actions. 117 * so_user_cookie is used by ipfw/dummynet. 118 */ 119 int so_fibnum; /* routing domain for this socket */ 120 uint32_t so_user_cookie; 121 122 int so_ts_clock; /* type of the clock used for timestamps */ 123 uint32_t so_max_pacing_rate; /* (f) TX rate limit in bytes/s */ 124 125 /* 126 * Mutexes to prevent interleaving of socket I/O. These have to be 127 * outside of the socket buffers in order to interlock with listen(2). 128 */ 129 struct sx so_snd_sx __aligned(CACHE_LINE_SIZE); 130 struct mtx so_snd_mtx; 131 132 struct sx so_rcv_sx __aligned(CACHE_LINE_SIZE); 133 struct mtx so_rcv_mtx; 134 135 union { 136 /* Regular (data flow) socket. */ 137 struct { 138 /* (cr, cs) Receive and send buffers. */ 139 struct sockbuf so_rcv, so_snd; 140 141 /* (e) Our place on accept queue. */ 142 TAILQ_ENTRY(socket) so_list; 143 struct socket *so_listen; /* (b) */ 144 enum socket_qstate so_qstate; /* (b) */ 145 /* (b) cached MAC label for peer */ 146 struct label *so_peerlabel; 147 u_long so_oobmark; /* chars to oob mark */ 148 149 /* (k) Our place on KTLS RX work queue. */ 150 STAILQ_ENTRY(socket) so_ktls_rx_list; 151 }; 152 /* 153 * Listening socket, where accepts occur, is so_listen in all 154 * subsidiary sockets. If so_listen is NULL, socket is not 155 * related to an accept. For a listening socket itself 156 * sol_incomp queues partially completed connections, while 157 * sol_comp is a queue of connections ready to be accepted. 158 * If a connection is aborted and it has so_listen set, then 159 * it has to be pulled out of either sol_incomp or sol_comp. 160 * We allow connections to queue up based on current queue 161 * lengths and limit on number of queued connections for this 162 * socket. 163 */ 164 struct { 165 /* (e) queue of partial unaccepted connections */ 166 struct accept_queue sol_incomp; 167 /* (e) queue of complete unaccepted connections */ 168 struct accept_queue sol_comp; 169 u_int sol_qlen; /* (e) sol_comp length */ 170 u_int sol_incqlen; /* (e) sol_incomp length */ 171 u_int sol_qlimit; /* (e) queue limit */ 172 173 /* accept_filter(9) optional data */ 174 struct accept_filter *sol_accept_filter; 175 void *sol_accept_filter_arg; /* saved filter args */ 176 char *sol_accept_filter_str; /* saved user args */ 177 178 /* Optional upcall, for kernel socket. */ 179 so_upcall_t *sol_upcall; /* (e) */ 180 void *sol_upcallarg; /* (e) */ 181 182 /* Socket buffer parameters, to be copied to 183 * dataflow sockets, accepted from this one. */ 184 int sol_sbrcv_lowat; 185 int sol_sbsnd_lowat; 186 u_int sol_sbrcv_hiwat; 187 u_int sol_sbsnd_hiwat; 188 short sol_sbrcv_flags; 189 short sol_sbsnd_flags; 190 sbintime_t sol_sbrcv_timeo; 191 sbintime_t sol_sbsnd_timeo; 192 193 /* Information tracking listen queue overflows. */ 194 struct timeval sol_lastover; /* (e) */ 195 int sol_overcount; /* (e) */ 196 }; 197 }; 198 }; 199 #endif /* defined(_KERNEL) || defined(_WANT_SOCKET) */ 200 201 /* 202 * Socket state bits. 203 * 204 * Historically, these bits were all kept in the so_state field. 205 * They are now split into separate, lock-specific fields. 206 * so_state maintains basic socket state protected by the socket lock. 207 * so_qstate holds information about the socket accept queues. 208 * Each socket buffer also has a state field holding information 209 * relevant to that socket buffer (can't send, rcv). 210 * Many fields will be read without locks to improve performance and avoid 211 * lock order issues. However, this approach must be used with caution. 212 */ 213 #define SS_ISCONNECTED 0x0002 /* socket connected to a peer */ 214 #define SS_ISCONNECTING 0x0004 /* in process of connecting to peer */ 215 #define SS_ISDISCONNECTING 0x0008 /* in process of disconnecting */ 216 #define SS_NBIO 0x0100 /* non-blocking ops */ 217 #define SS_ASYNC 0x0200 /* async i/o notify */ 218 #define SS_ISCONFIRMING 0x0400 /* deciding to accept connection req */ 219 #define SS_ISDISCONNECTED 0x2000 /* socket disconnected from peer */ 220 221 #ifdef _KERNEL 222 223 #define SOCK_MTX(so) (&(so)->so_lock) 224 #define SOCK_LOCK(so) mtx_lock(&(so)->so_lock) 225 #define SOCK_OWNED(so) mtx_owned(&(so)->so_lock) 226 #define SOCK_UNLOCK(so) mtx_unlock(&(so)->so_lock) 227 #define SOCK_LOCK_ASSERT(so) mtx_assert(&(so)->so_lock, MA_OWNED) 228 #define SOCK_UNLOCK_ASSERT(so) mtx_assert(&(so)->so_lock, MA_NOTOWNED) 229 230 #define SOLISTENING(sol) (((sol)->so_options & SO_ACCEPTCONN) != 0) 231 #define SOLISTEN_LOCK(sol) do { \ 232 mtx_lock(&(sol)->so_lock); \ 233 KASSERT(SOLISTENING(sol), \ 234 ("%s: %p not listening", __func__, (sol))); \ 235 } while (0) 236 #define SOLISTEN_TRYLOCK(sol) mtx_trylock(&(sol)->so_lock) 237 #define SOLISTEN_UNLOCK(sol) do { \ 238 KASSERT(SOLISTENING(sol), \ 239 ("%s: %p not listening", __func__, (sol))); \ 240 mtx_unlock(&(sol)->so_lock); \ 241 } while (0) 242 #define SOLISTEN_LOCK_ASSERT(sol) do { \ 243 mtx_assert(&(sol)->so_lock, MA_OWNED); \ 244 KASSERT(SOLISTENING(sol), \ 245 ("%s: %p not listening", __func__, (sol))); \ 246 } while (0) 247 #define SOLISTEN_UNLOCK_ASSERT(sol) do { \ 248 mtx_assert(&(sol)->so_lock, MA_NOTOWNED); \ 249 KASSERT(SOLISTENING(sol), \ 250 ("%s: %p not listening", __func__, (sol))); \ 251 } while (0) 252 253 /* 254 * Socket buffer locks. These are strongly preferred over SOCKBUF_LOCK(sb) 255 * macros, as we are moving towards protocol specific socket buffers. 256 */ 257 #define SOCK_RECVBUF_MTX(so) \ 258 (&(so)->so_rcv_mtx) 259 #define SOCK_RECVBUF_LOCK(so) \ 260 mtx_lock(SOCK_RECVBUF_MTX(so)) 261 #define SOCK_RECVBUF_UNLOCK(so) \ 262 mtx_unlock(SOCK_RECVBUF_MTX(so)) 263 #define SOCK_RECVBUF_LOCK_ASSERT(so) \ 264 mtx_assert(SOCK_RECVBUF_MTX(so), MA_OWNED) 265 #define SOCK_RECVBUF_UNLOCK_ASSERT(so) \ 266 mtx_assert(SOCK_RECVBUF_MTX(so), MA_NOTOWNED) 267 268 #define SOCK_SENDBUF_MTX(so) \ 269 (&(so)->so_snd_mtx) 270 #define SOCK_SENDBUF_LOCK(so) \ 271 mtx_lock(SOCK_SENDBUF_MTX(so)) 272 #define SOCK_SENDBUF_UNLOCK(so) \ 273 mtx_unlock(SOCK_SENDBUF_MTX(so)) 274 #define SOCK_SENDBUF_LOCK_ASSERT(so) \ 275 mtx_assert(SOCK_SENDBUF_MTX(so), MA_OWNED) 276 #define SOCK_SENDBUF_UNLOCK_ASSERT(so) \ 277 mtx_assert(SOCK_SENDBUF_MTX(so), MA_NOTOWNED) 278 279 #define SOCK_BUF_LOCK(so, which) \ 280 mtx_lock(soeventmtx(so, which)) 281 #define SOCK_BUF_UNLOCK(so, which) \ 282 mtx_unlock(soeventmtx(so, which)) 283 #define SOCK_BUF_LOCK_ASSERT(so, which) \ 284 mtx_assert(soeventmtx(so, which), MA_OWNED) 285 #define SOCK_BUF_UNLOCK_ASSERT(so, which) \ 286 mtx_assert(soeventmtx(so, which), MA_NOTOWNED) 287 288 static inline struct sockbuf * 289 sobuf(struct socket *so, const sb_which which) 290 { 291 return (which == SO_RCV ? &so->so_rcv : &so->so_snd); 292 } 293 294 static inline struct mtx * 295 soeventmtx(struct socket *so, const sb_which which) 296 { 297 return (which == SO_RCV ? SOCK_RECVBUF_MTX(so) : SOCK_SENDBUF_MTX(so)); 298 } 299 300 /* 301 * Macros for sockets and socket buffering. 302 */ 303 304 /* 305 * Flags to soiolock(). 306 */ 307 #define SBL_WAIT 0x00000001 /* Wait if not immediately available. */ 308 #define SBL_NOINTR 0x00000002 /* Force non-interruptible sleep. */ 309 #define SBL_VALID (SBL_WAIT | SBL_NOINTR) 310 311 #define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? 0 : SBL_WAIT) 312 313 #define SOCK_IO_SEND_LOCK(so, flags) \ 314 soiolock((so), &(so)->so_snd_sx, (flags)) 315 #define SOCK_IO_SEND_UNLOCK(so) \ 316 soiounlock(&(so)->so_snd_sx) 317 #define SOCK_IO_SEND_OWNED(so) sx_xlocked(&(so)->so_snd_sx) 318 #define SOCK_IO_RECV_LOCK(so, flags) \ 319 soiolock((so), &(so)->so_rcv_sx, (flags)) 320 #define SOCK_IO_RECV_UNLOCK(so) \ 321 soiounlock(&(so)->so_rcv_sx) 322 #define SOCK_IO_RECV_OWNED(so) sx_xlocked(&(so)->so_rcv_sx) 323 324 /* do we have to send all at once on a socket? */ 325 #define sosendallatonce(so) \ 326 ((so)->so_proto->pr_flags & PR_ATOMIC) 327 328 /* can we read something from so? */ 329 #define soreadabledata(so) \ 330 (sbavail(&(so)->so_rcv) >= (so)->so_rcv.sb_lowat || \ 331 (so)->so_error || (so)->so_rerror) 332 #define soreadable(so) \ 333 (soreadabledata(so) || ((so)->so_rcv.sb_state & SBS_CANTRCVMORE)) 334 335 /* can we write something to so? */ 336 #define sowriteable(so) \ 337 ((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \ 338 (((so)->so_state&SS_ISCONNECTED) || \ 339 ((so)->so_proto->pr_flags&PR_CONNREQUIRED)==0)) || \ 340 ((so)->so_snd.sb_state & SBS_CANTSENDMORE) || \ 341 (so)->so_error) 342 343 /* 344 * soref()/sorele() ref-count the socket structure. 345 * soref() may be called without owning socket lock, but in that case a 346 * caller must own something that holds socket, and so_count must be not 0. 347 * Note that you must still explicitly close the socket, but the last ref 348 * count will free the structure. 349 */ 350 #define soref(so) refcount_acquire(&(so)->so_count) 351 #define sorele(so) do { \ 352 SOCK_UNLOCK_ASSERT(so); \ 353 if (!refcount_release_if_not_last(&(so)->so_count)) { \ 354 SOCK_LOCK(so); \ 355 sorele_locked(so); \ 356 } \ 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(so) do { \ 368 SOCK_RECVBUF_LOCK(so); \ 369 sorwakeup_locked(so); \ 370 } while (0) 371 372 #define sowwakeup(so) do { \ 373 SOCK_SENDBUF_LOCK(so); \ 374 sowwakeup_locked(so); \ 375 } while (0) 376 377 struct accept_filter { 378 char accf_name[16]; 379 int (*accf_callback) 380 (struct socket *so, void *arg, int waitflag); 381 void * (*accf_create) 382 (struct socket *so, char *arg); 383 void (*accf_destroy) 384 (struct socket *so); 385 SLIST_ENTRY(accept_filter) accf_next; 386 }; 387 388 #define ACCEPT_FILTER_DEFINE(modname, filtname, cb, create, destroy, ver) \ 389 static struct accept_filter modname##_filter = { \ 390 .accf_name = filtname, \ 391 .accf_callback = cb, \ 392 .accf_create = create, \ 393 .accf_destroy = destroy, \ 394 }; \ 395 static moduledata_t modname##_mod = { \ 396 .name = __XSTRING(modname), \ 397 .evhand = accept_filt_generic_mod_event, \ 398 .priv = &modname##_filter, \ 399 }; \ 400 DECLARE_MODULE(modname, modname##_mod, SI_SUB_DRIVERS, \ 401 SI_ORDER_MIDDLE); \ 402 MODULE_VERSION(modname, ver) 403 404 #ifdef MALLOC_DECLARE 405 MALLOC_DECLARE(M_ACCF); 406 MALLOC_DECLARE(M_PCB); 407 MALLOC_DECLARE(M_SONAME); 408 #endif 409 410 /* 411 * Socket specific helper hook point identifiers 412 * Do not leave holes in the sequence, hook registration is a loop. 413 */ 414 #define HHOOK_SOCKET_OPT 0 415 #define HHOOK_SOCKET_CREATE 1 416 #define HHOOK_SOCKET_RCV 2 417 #define HHOOK_SOCKET_SND 3 418 #define HHOOK_FILT_SOREAD 4 419 #define HHOOK_FILT_SOWRITE 5 420 #define HHOOK_SOCKET_CLOSE 6 421 #define HHOOK_SOCKET_LAST HHOOK_SOCKET_CLOSE 422 423 struct socket_hhook_data { 424 struct socket *so; 425 struct mbuf *m; 426 void *hctx; /* hook point specific data*/ 427 int status; 428 }; 429 430 extern int maxsockets; 431 extern u_long sb_max; 432 extern so_gen_t so_gencnt; 433 434 struct file; 435 struct filecaps; 436 struct filedesc; 437 struct mbuf; 438 struct sockaddr; 439 struct ucred; 440 struct uio; 441 442 /* Return values for socket upcalls. */ 443 #define SU_OK 0 444 #define SU_ISCONNECTED 1 445 446 /* 447 * From uipc_socket and friends 448 */ 449 int getsockaddr(struct sockaddr **namp, const struct sockaddr *uaddr, 450 size_t len); 451 int getsock_cap(struct thread *td, int fd, cap_rights_t *rightsp, 452 struct file **fpp, struct filecaps *havecaps); 453 int getsock(struct thread *td, int fd, cap_rights_t *rightsp, 454 struct file **fpp); 455 void soabort(struct socket *so); 456 int soaccept(struct socket *so, struct sockaddr **nam); 457 void soaio_enqueue(struct task *task); 458 void soaio_rcv(void *context, int pending); 459 void soaio_snd(void *context, int pending); 460 int socheckuid(struct socket *so, uid_t uid); 461 int sobind(struct socket *so, struct sockaddr *nam, struct thread *td); 462 int sobindat(int fd, struct socket *so, struct sockaddr *nam, 463 struct thread *td); 464 int soclose(struct socket *so); 465 int soconnect(struct socket *so, struct sockaddr *nam, struct thread *td); 466 int soconnectat(int fd, struct socket *so, struct sockaddr *nam, 467 struct thread *td); 468 int soconnect2(struct socket *so1, struct socket *so2); 469 int socreate(int dom, struct socket **aso, int type, int proto, 470 struct ucred *cred, struct thread *td); 471 int sodisconnect(struct socket *so); 472 void sodtor_set(struct socket *, so_dtor_t *); 473 struct sockaddr *sodupsockaddr(const struct sockaddr *sa, int mflags); 474 void sohasoutofband(struct socket *so); 475 int solisten(struct socket *so, int backlog, struct thread *td); 476 void solisten_proto(struct socket *so, int backlog); 477 void solisten_proto_abort(struct socket *so); 478 int solisten_proto_check(struct socket *so); 479 bool solisten_enqueue(struct socket *, int); 480 int solisten_dequeue(struct socket *, struct socket **, int); 481 struct socket * 482 solisten_clone(struct socket *); 483 struct socket * 484 sonewconn(struct socket *head, int connstatus); 485 struct socket * 486 sopeeloff(struct socket *); 487 int sopoll(struct socket *so, int events, struct ucred *active_cred, 488 struct thread *td); 489 int sopoll_generic(struct socket *so, int events, 490 struct ucred *active_cred, struct thread *td); 491 int soreceive(struct socket *so, struct sockaddr **paddr, struct uio *uio, 492 struct mbuf **mp0, struct mbuf **controlp, int *flagsp); 493 int soreceive_stream(struct socket *so, struct sockaddr **paddr, 494 struct uio *uio, struct mbuf **mp0, struct mbuf **controlp, 495 int *flagsp); 496 int soreceive_dgram(struct socket *so, struct sockaddr **paddr, 497 struct uio *uio, struct mbuf **mp0, struct mbuf **controlp, 498 int *flagsp); 499 int soreceive_generic(struct socket *so, struct sockaddr **paddr, 500 struct uio *uio, struct mbuf **mp0, struct mbuf **controlp, 501 int *flagsp); 502 void sorele_locked(struct socket *so); 503 void sodealloc(struct socket *); 504 int soreserve(struct socket *so, u_long sndcc, u_long rcvcc); 505 void sorflush(struct socket *so); 506 int sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, 507 struct mbuf *top, struct mbuf *control, int flags, 508 struct thread *td); 509 int sousrsend(struct socket *so, struct sockaddr *addr, struct uio *uio, 510 struct mbuf *control, int flags, struct proc *); 511 int sosend_dgram(struct socket *so, struct sockaddr *addr, 512 struct uio *uio, struct mbuf *top, struct mbuf *control, 513 int flags, struct thread *td); 514 int sosend_generic(struct socket *so, struct sockaddr *addr, 515 struct uio *uio, struct mbuf *top, struct mbuf *control, 516 int flags, struct thread *td); 517 int soshutdown(struct socket *so, int how); 518 void soupcall_clear(struct socket *, sb_which); 519 void soupcall_set(struct socket *, sb_which, so_upcall_t, void *); 520 void solisten_upcall_set(struct socket *, so_upcall_t, void *); 521 void sorwakeup_locked(struct socket *); 522 void sowwakeup_locked(struct socket *); 523 void sowakeup_aio(struct socket *, sb_which); 524 void solisten_wakeup(struct socket *); 525 int selsocket(struct socket *so, int events, struct timeval *tv, 526 struct thread *td); 527 void soisconnected(struct socket *so); 528 void soisconnecting(struct socket *so); 529 void soisdisconnected(struct socket *so); 530 void soisdisconnecting(struct socket *so); 531 void socantrcvmore(struct socket *so); 532 void socantrcvmore_locked(struct socket *so); 533 void socantsendmore(struct socket *so); 534 void socantsendmore_locked(struct socket *so); 535 void soroverflow(struct socket *so); 536 void soroverflow_locked(struct socket *so); 537 int soiolock(struct socket *so, struct sx *sx, int flags); 538 void soiounlock(struct sx *sx); 539 540 /* 541 * Accept filter functions (duh). 542 */ 543 int accept_filt_add(struct accept_filter *filt); 544 int accept_filt_del(char *name); 545 struct accept_filter *accept_filt_get(char *name); 546 #ifdef ACCEPT_FILTER_MOD 547 #ifdef SYSCTL_DECL 548 SYSCTL_DECL(_net_inet_accf); 549 #endif 550 int accept_filt_generic_mod_event(module_t mod, int event, void *data); 551 #endif 552 553 #endif /* _KERNEL */ 554 555 /* 556 * Structure to export socket from kernel to utilities, via sysctl(3). 557 */ 558 struct xsocket { 559 ksize_t xso_len; /* length of this structure */ 560 kvaddr_t xso_so; /* kernel address of struct socket */ 561 kvaddr_t so_pcb; /* kernel address of struct inpcb */ 562 uint64_t so_oobmark; 563 int64_t so_spare64[8]; 564 int32_t xso_protocol; 565 int32_t xso_family; 566 uint32_t so_qlen; 567 uint32_t so_incqlen; 568 uint32_t so_qlimit; 569 pid_t so_pgid; 570 uid_t so_uid; 571 int32_t so_spare32[8]; 572 int16_t so_type; 573 int16_t so_options; 574 int16_t so_linger; 575 int16_t so_state; 576 int16_t so_timeo; 577 uint16_t so_error; 578 struct xsockbuf { 579 uint32_t sb_cc; 580 uint32_t sb_hiwat; 581 uint32_t sb_mbcnt; 582 uint32_t sb_spare0; /* was sb_mcnt */ 583 uint32_t sb_spare1; /* was sb_ccnt */ 584 uint32_t sb_mbmax; 585 int32_t sb_lowat; 586 int32_t sb_timeo; 587 int16_t sb_flags; 588 } so_rcv, so_snd; 589 }; 590 591 #ifdef _KERNEL 592 void sotoxsocket(struct socket *so, struct xsocket *xso); 593 void sbtoxsockbuf(struct sockbuf *sb, struct xsockbuf *xsb); 594 #endif 595 596 /* 597 * Socket buffer state bits. Exported via libprocstat(3). 598 */ 599 #define SBS_CANTSENDMORE 0x0010 /* can't send more data to peer */ 600 #define SBS_CANTRCVMORE 0x0020 /* can't receive more data from peer */ 601 #define SBS_RCVATMARK 0x0040 /* at mark on input */ 602 603 #endif /* !_SYS_SOCKETVAR_H_ */
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