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 SOCKBUF_LOCK(&so->so_rcv). 81 * (cs) locked by SOCKBUF_LOCK(&so->so_snd). 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 short so_type; /* (a) generic type, see socket.h */ 95 int so_options; /* (b) from socket call, see socket.h */ 96 short so_linger; /* time to linger close(2) */ 97 short so_state; /* (b) internal state flags SS_* */ 98 void *so_pcb; /* protocol control block */ 99 struct vnet *so_vnet; /* (a) network stack instance */ 100 struct protosw *so_proto; /* (a) protocol handle */ 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 union { 125 /* Regular (data flow) socket. */ 126 struct { 127 /* (cr, cs) Receive and send buffers. */ 128 struct sockbuf so_rcv, so_snd; 129 130 /* (e) Our place on accept queue. */ 131 TAILQ_ENTRY(socket) so_list; 132 struct socket *so_listen; /* (b) */ 133 enum socket_qstate so_qstate; /* (b) */ 134 /* (b) cached MAC label for peer */ 135 struct label *so_peerlabel; 136 u_long so_oobmark; /* chars to oob mark */ 137 138 /* (k) Our place on KTLS RX work queue. */ 139 STAILQ_ENTRY(socket) so_ktls_rx_list; 140 }; 141 /* 142 * Listening socket, where accepts occur, is so_listen in all 143 * subsidiary sockets. If so_listen is NULL, socket is not 144 * related to an accept. For a listening socket itself 145 * sol_incomp queues partially completed connections, while 146 * sol_comp is a queue of connections ready to be accepted. 147 * If a connection is aborted and it has so_listen set, then 148 * it has to be pulled out of either sol_incomp or sol_comp. 149 * We allow connections to queue up based on current queue 150 * lengths and limit on number of queued connections for this 151 * socket. 152 */ 153 struct { 154 /* (e) queue of partial unaccepted connections */ 155 struct accept_queue sol_incomp; 156 /* (e) queue of complete unaccepted connections */ 157 struct accept_queue sol_comp; 158 u_int sol_qlen; /* (e) sol_comp length */ 159 u_int sol_incqlen; /* (e) sol_incomp length */ 160 u_int sol_qlimit; /* (e) queue limit */ 161 162 /* accept_filter(9) optional data */ 163 struct accept_filter *sol_accept_filter; 164 void *sol_accept_filter_arg; /* saved filter args */ 165 char *sol_accept_filter_str; /* saved user args */ 166 167 /* Optional upcall, for kernel socket. */ 168 so_upcall_t *sol_upcall; /* (e) */ 169 void *sol_upcallarg; /* (e) */ 170 171 /* Socket buffer parameters, to be copied to 172 * dataflow sockets, accepted from this one. */ 173 int sol_sbrcv_lowat; 174 int sol_sbsnd_lowat; 175 u_int sol_sbrcv_hiwat; 176 u_int sol_sbsnd_hiwat; 177 short sol_sbrcv_flags; 178 short sol_sbsnd_flags; 179 sbintime_t sol_sbrcv_timeo; 180 sbintime_t sol_sbsnd_timeo; 181 182 /* Information tracking listen queue overflows. */ 183 struct timeval sol_lastover; /* (e) */ 184 int sol_overcount; /* (e) */ 185 }; 186 }; 187 }; 188 #endif /* defined(_KERNEL) || defined(_WANT_SOCKET) */ 189 190 /* 191 * Socket state bits. 192 * 193 * Historically, these bits were all kept in the so_state field. 194 * They are now split into separate, lock-specific fields. 195 * so_state maintains basic socket state protected by the socket lock. 196 * so_qstate holds information about the socket accept queues. 197 * Each socket buffer also has a state field holding information 198 * relevant to that socket buffer (can't send, rcv). 199 * Many fields will be read without locks to improve performance and avoid 200 * lock order issues. However, this approach must be used with caution. 201 */ 202 #define SS_NOFDREF 0x0001 /* no file table ref any more */ 203 #define SS_ISCONNECTED 0x0002 /* socket connected to a peer */ 204 #define SS_ISCONNECTING 0x0004 /* in process of connecting to peer */ 205 #define SS_ISDISCONNECTING 0x0008 /* in process of disconnecting */ 206 #define SS_NBIO 0x0100 /* non-blocking ops */ 207 #define SS_ASYNC 0x0200 /* async i/o notify */ 208 #define SS_ISCONFIRMING 0x0400 /* deciding to accept connection req */ 209 #define SS_ISDISCONNECTED 0x2000 /* socket disconnected from peer */ 210 211 /* 212 * Protocols can mark a socket as SS_PROTOREF to indicate that, following 213 * pru_detach, they still want the socket to persist, and will free it 214 * themselves when they are done. Protocols should only ever call sofree() 215 * following setting this flag in pru_detach(), and never otherwise, as 216 * sofree() bypasses socket reference counting. 217 */ 218 #define SS_PROTOREF 0x4000 /* strong protocol reference */ 219 220 #ifdef _KERNEL 221 222 #define SOCK_MTX(so) (&(so)->so_lock) 223 #define SOCK_LOCK(so) mtx_lock(&(so)->so_lock) 224 #define SOCK_OWNED(so) mtx_owned(&(so)->so_lock) 225 #define SOCK_UNLOCK(so) mtx_unlock(&(so)->so_lock) 226 #define SOCK_LOCK_ASSERT(so) mtx_assert(&(so)->so_lock, MA_OWNED) 227 #define SOCK_UNLOCK_ASSERT(so) mtx_assert(&(so)->so_lock, MA_NOTOWNED) 228 229 #define SOLISTENING(sol) (((sol)->so_options & SO_ACCEPTCONN) != 0) 230 #define SOLISTEN_LOCK(sol) do { \ 231 mtx_lock(&(sol)->so_lock); \ 232 KASSERT(SOLISTENING(sol), \ 233 ("%s: %p not listening", __func__, (sol))); \ 234 } while (0) 235 #define SOLISTEN_TRYLOCK(sol) mtx_trylock(&(sol)->so_lock) 236 #define SOLISTEN_UNLOCK(sol) do { \ 237 KASSERT(SOLISTENING(sol), \ 238 ("%s: %p not listening", __func__, (sol))); \ 239 mtx_unlock(&(sol)->so_lock); \ 240 } while (0) 241 #define SOLISTEN_LOCK_ASSERT(sol) do { \ 242 mtx_assert(&(sol)->so_lock, MA_OWNED); \ 243 KASSERT(SOLISTENING(sol), \ 244 ("%s: %p not listening", __func__, (sol))); \ 245 } while (0) 246 247 /* 248 * Macros for sockets and socket buffering. 249 */ 250 251 /* 252 * Flags to soiolock(). 253 */ 254 #define SBL_WAIT 0x00000001 /* Wait if not immediately available. */ 255 #define SBL_NOINTR 0x00000002 /* Force non-interruptible sleep. */ 256 #define SBL_VALID (SBL_WAIT | SBL_NOINTR) 257 258 259 #define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? 0 : SBL_WAIT) 260 261 #define SOCK_IO_SEND_LOCK(so, flags) \ 262 soiolock((so), &(so)->so_snd.sb_sx, (flags)) 263 #define SOCK_IO_SEND_UNLOCK(so) \ 264 soiounlock(&(so)->so_snd.sb_sx) 265 #define SOCK_IO_RECV_LOCK(so, flags) \ 266 soiolock((so), &(so)->so_rcv.sb_sx, (flags)) 267 #define SOCK_IO_RECV_UNLOCK(so) \ 268 soiounlock(&(so)->so_rcv.sb_sx) 269 270 /* 271 * Do we need to notify the other side when I/O is possible? 272 */ 273 #define sb_notify(sb) (((sb)->sb_flags & (SB_WAIT | SB_SEL | SB_ASYNC | \ 274 SB_UPCALL | SB_AIO | SB_KNOTE)) != 0) 275 276 /* do we have to send all at once on a socket? */ 277 #define sosendallatonce(so) \ 278 ((so)->so_proto->pr_flags & PR_ATOMIC) 279 280 /* can we read something from so? */ 281 #define soreadabledata(so) \ 282 (sbavail(&(so)->so_rcv) >= (so)->so_rcv.sb_lowat || \ 283 (so)->so_error || (so)->so_rerror) 284 #define soreadable(so) \ 285 (soreadabledata(so) || ((so)->so_rcv.sb_state & SBS_CANTRCVMORE)) 286 287 /* can we write something to so? */ 288 #define sowriteable(so) \ 289 ((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \ 290 (((so)->so_state&SS_ISCONNECTED) || \ 291 ((so)->so_proto->pr_flags&PR_CONNREQUIRED)==0)) || \ 292 ((so)->so_snd.sb_state & SBS_CANTSENDMORE) || \ 293 (so)->so_error) 294 295 /* 296 * soref()/sorele() ref-count the socket structure. 297 * soref() may be called without owning socket lock, but in that case a 298 * caller must own something that holds socket, and so_count must be not 0. 299 * Note that you must still explicitly close the socket, but the last ref 300 * count will free the structure. 301 */ 302 #define soref(so) refcount_acquire(&(so)->so_count) 303 #define sorele(so) do { \ 304 SOCK_LOCK_ASSERT(so); \ 305 if (refcount_release(&(so)->so_count)) \ 306 sofree(so); \ 307 else \ 308 SOCK_UNLOCK(so); \ 309 } while (0) 310 311 /* 312 * In sorwakeup() and sowwakeup(), acquire the socket buffer lock to 313 * avoid a non-atomic test-and-wakeup. However, sowakeup is 314 * responsible for releasing the lock if it is called. We unlock only 315 * if we don't call into sowakeup. If any code is introduced that 316 * directly invokes the underlying sowakeup() primitives, it must 317 * maintain the same semantics. 318 */ 319 #define sorwakeup_locked(so) do { \ 320 SOCKBUF_LOCK_ASSERT(&(so)->so_rcv); \ 321 if (sb_notify(&(so)->so_rcv)) \ 322 sowakeup((so), &(so)->so_rcv); \ 323 else \ 324 SOCKBUF_UNLOCK(&(so)->so_rcv); \ 325 } while (0) 326 327 #define sorwakeup(so) do { \ 328 SOCKBUF_LOCK(&(so)->so_rcv); \ 329 sorwakeup_locked(so); \ 330 } while (0) 331 332 #define sowwakeup_locked(so) do { \ 333 SOCKBUF_LOCK_ASSERT(&(so)->so_snd); \ 334 if (sb_notify(&(so)->so_snd)) \ 335 sowakeup((so), &(so)->so_snd); \ 336 else \ 337 SOCKBUF_UNLOCK(&(so)->so_snd); \ 338 } while (0) 339 340 #define sowwakeup(so) do { \ 341 SOCKBUF_LOCK(&(so)->so_snd); \ 342 sowwakeup_locked(so); \ 343 } while (0) 344 345 struct accept_filter { 346 char accf_name[16]; 347 int (*accf_callback) 348 (struct socket *so, void *arg, int waitflag); 349 void * (*accf_create) 350 (struct socket *so, char *arg); 351 void (*accf_destroy) 352 (struct socket *so); 353 SLIST_ENTRY(accept_filter) accf_next; 354 }; 355 356 #define ACCEPT_FILTER_DEFINE(modname, filtname, cb, create, destroy, ver) \ 357 static struct accept_filter modname##_filter = { \ 358 .accf_name = filtname, \ 359 .accf_callback = cb, \ 360 .accf_create = create, \ 361 .accf_destroy = destroy, \ 362 }; \ 363 static moduledata_t modname##_mod = { \ 364 .name = __XSTRING(modname), \ 365 .evhand = accept_filt_generic_mod_event, \ 366 .priv = &modname##_filter, \ 367 }; \ 368 DECLARE_MODULE(modname, modname##_mod, SI_SUB_DRIVERS, \ 369 SI_ORDER_MIDDLE); \ 370 MODULE_VERSION(modname, ver) 371 372 #ifdef MALLOC_DECLARE 373 MALLOC_DECLARE(M_ACCF); 374 MALLOC_DECLARE(M_PCB); 375 MALLOC_DECLARE(M_SONAME); 376 #endif 377 378 /* 379 * Socket specific helper hook point identifiers 380 * Do not leave holes in the sequence, hook registration is a loop. 381 */ 382 #define HHOOK_SOCKET_OPT 0 383 #define HHOOK_SOCKET_CREATE 1 384 #define HHOOK_SOCKET_RCV 2 385 #define HHOOK_SOCKET_SND 3 386 #define HHOOK_FILT_SOREAD 4 387 #define HHOOK_FILT_SOWRITE 5 388 #define HHOOK_SOCKET_CLOSE 6 389 #define HHOOK_SOCKET_LAST HHOOK_SOCKET_CLOSE 390 391 struct socket_hhook_data { 392 struct socket *so; 393 struct mbuf *m; 394 void *hctx; /* hook point specific data*/ 395 int status; 396 }; 397 398 extern int maxsockets; 399 extern u_long sb_max; 400 extern so_gen_t so_gencnt; 401 402 struct file; 403 struct filecaps; 404 struct filedesc; 405 struct mbuf; 406 struct sockaddr; 407 struct ucred; 408 struct uio; 409 410 /* 'which' values for socket upcalls. */ 411 #define SO_RCV 1 412 #define SO_SND 2 413 414 /* Return values for socket upcalls. */ 415 #define SU_OK 0 416 #define SU_ISCONNECTED 1 417 418 /* 419 * From uipc_socket and friends 420 */ 421 int getsockaddr(struct sockaddr **namp, const struct sockaddr *uaddr, 422 size_t len); 423 int getsock_cap(struct thread *td, int fd, cap_rights_t *rightsp, 424 struct file **fpp, u_int *fflagp, struct filecaps *havecaps); 425 void soabort(struct socket *so); 426 int soaccept(struct socket *so, struct sockaddr **nam); 427 void soaio_enqueue(struct task *task); 428 void soaio_rcv(void *context, int pending); 429 void soaio_snd(void *context, int pending); 430 int socheckuid(struct socket *so, uid_t uid); 431 int sobind(struct socket *so, struct sockaddr *nam, struct thread *td); 432 int sobindat(int fd, struct socket *so, struct sockaddr *nam, 433 struct thread *td); 434 int soclose(struct socket *so); 435 int soconnect(struct socket *so, struct sockaddr *nam, struct thread *td); 436 int soconnectat(int fd, struct socket *so, struct sockaddr *nam, 437 struct thread *td); 438 int soconnect2(struct socket *so1, struct socket *so2); 439 int socreate(int dom, struct socket **aso, int type, int proto, 440 struct ucred *cred, struct thread *td); 441 int sodisconnect(struct socket *so); 442 void sodtor_set(struct socket *, so_dtor_t *); 443 struct sockaddr *sodupsockaddr(const struct sockaddr *sa, int mflags); 444 void sofree(struct socket *so); 445 void sohasoutofband(struct socket *so); 446 int solisten(struct socket *so, int backlog, struct thread *td); 447 void solisten_proto(struct socket *so, int backlog); 448 int solisten_proto_check(struct socket *so); 449 int solisten_dequeue(struct socket *, struct socket **, int); 450 struct socket * 451 sonewconn(struct socket *head, int connstatus); 452 struct socket * 453 sopeeloff(struct socket *); 454 int sopoll(struct socket *so, int events, struct ucred *active_cred, 455 struct thread *td); 456 int sopoll_generic(struct socket *so, int events, 457 struct ucred *active_cred, struct thread *td); 458 int soreceive(struct socket *so, struct sockaddr **paddr, struct uio *uio, 459 struct mbuf **mp0, struct mbuf **controlp, int *flagsp); 460 int soreceive_stream(struct socket *so, struct sockaddr **paddr, 461 struct uio *uio, struct mbuf **mp0, struct mbuf **controlp, 462 int *flagsp); 463 int soreceive_dgram(struct socket *so, struct sockaddr **paddr, 464 struct uio *uio, struct mbuf **mp0, struct mbuf **controlp, 465 int *flagsp); 466 int soreceive_generic(struct socket *so, struct sockaddr **paddr, 467 struct uio *uio, struct mbuf **mp0, struct mbuf **controlp, 468 int *flagsp); 469 int soreserve(struct socket *so, u_long sndcc, u_long rcvcc); 470 void sorflush(struct socket *so); 471 int sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, 472 struct mbuf *top, struct mbuf *control, int flags, 473 struct thread *td); 474 int sosend_dgram(struct socket *so, struct sockaddr *addr, 475 struct uio *uio, struct mbuf *top, struct mbuf *control, 476 int flags, struct thread *td); 477 int sosend_generic(struct socket *so, struct sockaddr *addr, 478 struct uio *uio, struct mbuf *top, struct mbuf *control, 479 int flags, struct thread *td); 480 int soshutdown(struct socket *so, int how); 481 void soupcall_clear(struct socket *, int); 482 void soupcall_set(struct socket *, int, so_upcall_t, void *); 483 void solisten_upcall_set(struct socket *, so_upcall_t, void *); 484 void sowakeup(struct socket *so, struct sockbuf *sb); 485 void sowakeup_aio(struct socket *so, struct sockbuf *sb); 486 void solisten_wakeup(struct socket *); 487 int selsocket(struct socket *so, int events, struct timeval *tv, 488 struct thread *td); 489 void soisconnected(struct socket *so); 490 void soisconnecting(struct socket *so); 491 void soisdisconnected(struct socket *so); 492 void soisdisconnecting(struct socket *so); 493 void socantrcvmore(struct socket *so); 494 void socantrcvmore_locked(struct socket *so); 495 void socantsendmore(struct socket *so); 496 void socantsendmore_locked(struct socket *so); 497 void soroverflow(struct socket *so); 498 void soroverflow_locked(struct socket *so); 499 int soiolock(struct socket *so, struct sx *sx, int flags); 500 void soiounlock(struct sx *sx); 501 502 /* 503 * Accept filter functions (duh). 504 */ 505 int accept_filt_add(struct accept_filter *filt); 506 int accept_filt_del(char *name); 507 struct accept_filter *accept_filt_get(char *name); 508 #ifdef ACCEPT_FILTER_MOD 509 #ifdef SYSCTL_DECL 510 SYSCTL_DECL(_net_inet_accf); 511 #endif 512 int accept_filt_generic_mod_event(module_t mod, int event, void *data); 513 #endif 514 515 #endif /* _KERNEL */ 516 517 /* 518 * Structure to export socket from kernel to utilities, via sysctl(3). 519 */ 520 struct xsocket { 521 ksize_t xso_len; /* length of this structure */ 522 kvaddr_t xso_so; /* kernel address of struct socket */ 523 kvaddr_t so_pcb; /* kernel address of struct inpcb */ 524 uint64_t so_oobmark; 525 int64_t so_spare64[8]; 526 int32_t xso_protocol; 527 int32_t xso_family; 528 uint32_t so_qlen; 529 uint32_t so_incqlen; 530 uint32_t so_qlimit; 531 pid_t so_pgid; 532 uid_t so_uid; 533 int32_t so_spare32[8]; 534 int16_t so_type; 535 int16_t so_options; 536 int16_t so_linger; 537 int16_t so_state; 538 int16_t so_timeo; 539 uint16_t so_error; 540 struct xsockbuf { 541 uint32_t sb_cc; 542 uint32_t sb_hiwat; 543 uint32_t sb_mbcnt; 544 uint32_t sb_mcnt; 545 uint32_t sb_ccnt; 546 uint32_t sb_mbmax; 547 int32_t sb_lowat; 548 int32_t sb_timeo; 549 int16_t sb_flags; 550 } so_rcv, so_snd; 551 }; 552 553 #ifdef _KERNEL 554 void sotoxsocket(struct socket *so, struct xsocket *xso); 555 void sbtoxsockbuf(struct sockbuf *sb, struct xsockbuf *xsb); 556 #endif 557 558 /* 559 * Socket buffer state bits. Exported via libprocstat(3). 560 */ 561 #define SBS_CANTSENDMORE 0x0010 /* can't send more data to peer */ 562 #define SBS_CANTRCVMORE 0x0020 /* can't receive more data from peer */ 563 #define SBS_RCVATMARK 0x0040 /* at mark on input */ 564 565 #endif /* !_SYS_SOCKETVAR_H_ */ 566