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 34 #ifndef _SYS_SOCKETVAR_H_ 35 #define _SYS_SOCKETVAR_H_ 36 37 /* 38 * Socket generation count type. Also used in xinpcb, xtcpcb, xunpcb. 39 */ 40 typedef uint64_t so_gen_t; 41 42 #if defined(_KERNEL) || defined(_WANT_SOCKET) 43 #include <sys/queue.h> /* for TAILQ macros */ 44 #include <sys/selinfo.h> /* for struct selinfo */ 45 #include <sys/_lock.h> 46 #include <sys/_mutex.h> 47 #include <sys/osd.h> 48 #include <sys/_sx.h> 49 #include <sys/sockbuf.h> 50 #ifdef _KERNEL 51 #include <sys/caprights.h> 52 #include <sys/sockopt.h> 53 #endif 54 55 struct vnet; 56 57 /* 58 * Kernel structure per socket. 59 * Contains send and receive buffer queues, 60 * handle on protocol and pointer to protocol 61 * private data and error information. 62 */ 63 typedef int so_upcall_t(struct socket *, void *, int); 64 typedef void so_dtor_t(struct socket *); 65 66 struct socket; 67 68 enum socket_qstate { 69 SQ_NONE = 0, 70 SQ_INCOMP = 0x0800, /* on sol_incomp */ 71 SQ_COMP = 0x1000, /* on sol_comp */ 72 }; 73 74 /*- 75 * Locking key to struct socket: 76 * (a) constant after allocation, no locking required. 77 * (b) locked by SOCK_LOCK(so). 78 * (cr) locked by SOCKBUF_LOCK(&so->so_rcv). 79 * (cs) locked by SOCKBUF_LOCK(&so->so_snd). 80 * (e) locked by SOLISTEN_LOCK() of corresponding listening socket. 81 * (f) not locked since integer reads/writes are atomic. 82 * (g) used only as a sleep/wakeup address, no value. 83 * (h) locked by global mutex so_global_mtx. 84 * (k) locked by KTLS workqueue mutex 85 */ 86 TAILQ_HEAD(accept_queue, socket); 87 struct socket { 88 struct mtx so_lock; 89 volatile u_int so_count; /* (b / refcount) */ 90 struct selinfo so_rdsel; /* (b/cr) for so_rcv/so_comp */ 91 struct selinfo so_wrsel; /* (b/cs) for so_snd */ 92 short so_type; /* (a) generic type, see socket.h */ 93 int so_options; /* (b) from socket call, see socket.h */ 94 short so_linger; /* time to linger close(2) */ 95 short so_state; /* (b) internal state flags SS_* */ 96 void *so_pcb; /* protocol control block */ 97 struct vnet *so_vnet; /* (a) network stack instance */ 98 struct protosw *so_proto; /* (a) protocol handle */ 99 short so_timeo; /* (g) connection timeout */ 100 u_short so_error; /* (f) error affecting connection */ 101 u_short so_rerror; /* (f) error affecting connection */ 102 struct sigio *so_sigio; /* [sg] information for async I/O or 103 out of band data (SIGURG) */ 104 struct ucred *so_cred; /* (a) user credentials */ 105 struct label *so_label; /* (b) MAC label for socket */ 106 /* NB: generation count must not be first. */ 107 so_gen_t so_gencnt; /* (h) generation count */ 108 void *so_emuldata; /* (b) private data for emulators */ 109 so_dtor_t *so_dtor; /* (b) optional destructor */ 110 struct osd osd; /* Object Specific extensions */ 111 /* 112 * so_fibnum, so_user_cookie and friends can be used to attach 113 * some user-specified metadata to a socket, which then can be 114 * used by the kernel for various actions. 115 * so_user_cookie is used by ipfw/dummynet. 116 */ 117 int so_fibnum; /* routing domain for this socket */ 118 uint32_t so_user_cookie; 119 120 int so_ts_clock; /* type of the clock used for timestamps */ 121 uint32_t so_max_pacing_rate; /* (f) TX rate limit in bytes/s */ 122 union { 123 /* Regular (data flow) socket. */ 124 struct { 125 /* (cr, cs) Receive and send buffers. */ 126 struct sockbuf so_rcv, so_snd; 127 128 /* (e) Our place on accept queue. */ 129 TAILQ_ENTRY(socket) so_list; 130 struct socket *so_listen; /* (b) */ 131 enum socket_qstate so_qstate; /* (b) */ 132 /* (b) cached MAC label for peer */ 133 struct label *so_peerlabel; 134 u_long so_oobmark; /* chars to oob mark */ 135 136 /* (k) Our place on KTLS RX work queue. */ 137 STAILQ_ENTRY(socket) so_ktls_rx_list; 138 }; 139 /* 140 * Listening socket, where accepts occur, is so_listen in all 141 * subsidiary sockets. If so_listen is NULL, socket is not 142 * related to an accept. For a listening socket itself 143 * sol_incomp queues partially completed connections, while 144 * sol_comp is a queue of connections ready to be accepted. 145 * If a connection is aborted and it has so_listen set, then 146 * it has to be pulled out of either sol_incomp or sol_comp. 147 * We allow connections to queue up based on current queue 148 * lengths and limit on number of queued connections for this 149 * socket. 150 */ 151 struct { 152 /* (e) queue of partial unaccepted connections */ 153 struct accept_queue sol_incomp; 154 /* (e) queue of complete unaccepted connections */ 155 struct accept_queue sol_comp; 156 u_int sol_qlen; /* (e) sol_comp length */ 157 u_int sol_incqlen; /* (e) sol_incomp length */ 158 u_int sol_qlimit; /* (e) queue limit */ 159 160 /* accept_filter(9) optional data */ 161 struct accept_filter *sol_accept_filter; 162 void *sol_accept_filter_arg; /* saved filter args */ 163 char *sol_accept_filter_str; /* saved user args */ 164 165 /* Optional upcall, for kernel socket. */ 166 so_upcall_t *sol_upcall; /* (e) */ 167 void *sol_upcallarg; /* (e) */ 168 169 /* Socket buffer parameters, to be copied to 170 * dataflow sockets, accepted from this one. */ 171 int sol_sbrcv_lowat; 172 int sol_sbsnd_lowat; 173 u_int sol_sbrcv_hiwat; 174 u_int sol_sbsnd_hiwat; 175 short sol_sbrcv_flags; 176 short sol_sbsnd_flags; 177 sbintime_t sol_sbrcv_timeo; 178 sbintime_t sol_sbsnd_timeo; 179 180 /* Information tracking listen queue overflows. */ 181 struct timeval sol_lastover; /* (e) */ 182 int sol_overcount; /* (e) */ 183 }; 184 }; 185 }; 186 #endif /* defined(_KERNEL) || defined(_WANT_SOCKET) */ 187 188 /* 189 * Socket state bits. 190 * 191 * Historically, these bits were all kept in the so_state field. 192 * They are now split into separate, lock-specific fields. 193 * so_state maintains basic socket state protected by the socket lock. 194 * so_qstate holds information about the socket accept queues. 195 * Each socket buffer also has a state field holding information 196 * relevant to that socket buffer (can't send, rcv). 197 * Many fields will be read without locks to improve performance and avoid 198 * lock order issues. However, this approach must be used with caution. 199 */ 200 #define SS_NOFDREF 0x0001 /* no file table ref any more */ 201 #define SS_ISCONNECTED 0x0002 /* socket connected to a peer */ 202 #define SS_ISCONNECTING 0x0004 /* in process of connecting to peer */ 203 #define SS_ISDISCONNECTING 0x0008 /* in process of disconnecting */ 204 #define SS_NBIO 0x0100 /* non-blocking ops */ 205 #define SS_ASYNC 0x0200 /* async i/o notify */ 206 #define SS_ISCONFIRMING 0x0400 /* deciding to accept connection req */ 207 #define SS_ISDISCONNECTED 0x2000 /* socket disconnected from peer */ 208 209 /* 210 * Protocols can mark a socket as SS_PROTOREF to indicate that, following 211 * pru_detach, they still want the socket to persist, and will free it 212 * themselves when they are done. Protocols should only ever call sofree() 213 * following setting this flag in pru_detach(), and never otherwise, as 214 * sofree() bypasses socket reference counting. 215 */ 216 #define SS_PROTOREF 0x4000 /* strong protocol reference */ 217 218 #ifdef _KERNEL 219 220 #define SOCK_MTX(so) (&(so)->so_lock) 221 #define SOCK_LOCK(so) mtx_lock(&(so)->so_lock) 222 #define SOCK_OWNED(so) mtx_owned(&(so)->so_lock) 223 #define SOCK_UNLOCK(so) mtx_unlock(&(so)->so_lock) 224 #define SOCK_LOCK_ASSERT(so) mtx_assert(&(so)->so_lock, MA_OWNED) 225 #define SOCK_UNLOCK_ASSERT(so) mtx_assert(&(so)->so_lock, MA_NOTOWNED) 226 227 #define SOLISTENING(sol) (((sol)->so_options & SO_ACCEPTCONN) != 0) 228 #define SOLISTEN_LOCK(sol) do { \ 229 mtx_lock(&(sol)->so_lock); \ 230 KASSERT(SOLISTENING(sol), \ 231 ("%s: %p not listening", __func__, (sol))); \ 232 } while (0) 233 #define SOLISTEN_TRYLOCK(sol) mtx_trylock(&(sol)->so_lock) 234 #define SOLISTEN_UNLOCK(sol) do { \ 235 KASSERT(SOLISTENING(sol), \ 236 ("%s: %p not listening", __func__, (sol))); \ 237 mtx_unlock(&(sol)->so_lock); \ 238 } while (0) 239 #define SOLISTEN_LOCK_ASSERT(sol) do { \ 240 mtx_assert(&(sol)->so_lock, MA_OWNED); \ 241 KASSERT(SOLISTENING(sol), \ 242 ("%s: %p not listening", __func__, (sol))); \ 243 } while (0) 244 245 /* 246 * Macros for sockets and socket buffering. 247 */ 248 249 /* 250 * Flags to soiolock(). 251 */ 252 #define SBL_WAIT 0x00000001 /* Wait if not immediately available. */ 253 #define SBL_NOINTR 0x00000002 /* Force non-interruptible sleep. */ 254 #define SBL_VALID (SBL_WAIT | SBL_NOINTR) 255 256 257 #define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? 0 : SBL_WAIT) 258 259 #define SOCK_IO_SEND_LOCK(so, flags) \ 260 soiolock((so), &(so)->so_snd.sb_sx, (flags)) 261 #define SOCK_IO_SEND_UNLOCK(so) \ 262 soiounlock(&(so)->so_snd.sb_sx) 263 #define SOCK_IO_RECV_LOCK(so, flags) \ 264 soiolock((so), &(so)->so_rcv.sb_sx, (flags)) 265 #define SOCK_IO_RECV_UNLOCK(so) \ 266 soiounlock(&(so)->so_rcv.sb_sx) 267 268 /* 269 * Do we need to notify the other side when I/O is possible? 270 */ 271 #define sb_notify(sb) (((sb)->sb_flags & (SB_WAIT | SB_SEL | SB_ASYNC | \ 272 SB_UPCALL | SB_AIO | SB_KNOTE)) != 0) 273 274 /* do we have to send all at once on a socket? */ 275 #define sosendallatonce(so) \ 276 ((so)->so_proto->pr_flags & PR_ATOMIC) 277 278 /* can we read something from so? */ 279 #define soreadabledata(so) \ 280 (sbavail(&(so)->so_rcv) >= (so)->so_rcv.sb_lowat || \ 281 (so)->so_error || (so)->so_rerror) 282 #define soreadable(so) \ 283 (soreadabledata(so) || ((so)->so_rcv.sb_state & SBS_CANTRCVMORE)) 284 285 /* can we write something to so? */ 286 #define sowriteable(so) \ 287 ((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \ 288 (((so)->so_state&SS_ISCONNECTED) || \ 289 ((so)->so_proto->pr_flags&PR_CONNREQUIRED)==0)) || \ 290 ((so)->so_snd.sb_state & SBS_CANTSENDMORE) || \ 291 (so)->so_error) 292 293 /* 294 * soref()/sorele() ref-count the socket structure. 295 * soref() may be called without owning socket lock, but in that case a 296 * caller must own something that holds socket, and so_count must be not 0. 297 * Note that you must still explicitly close the socket, but the last ref 298 * count will free the structure. 299 */ 300 #define soref(so) refcount_acquire(&(so)->so_count) 301 #define sorele(so) do { \ 302 SOCK_LOCK_ASSERT(so); \ 303 if (refcount_release(&(so)->so_count)) \ 304 sofree(so); \ 305 else \ 306 SOCK_UNLOCK(so); \ 307 } while (0) 308 309 /* 310 * In sorwakeup() and sowwakeup(), acquire the socket buffer lock to 311 * avoid a non-atomic test-and-wakeup. However, sowakeup is 312 * responsible for releasing the lock if it is called. We unlock only 313 * if we don't call into sowakeup. If any code is introduced that 314 * directly invokes the underlying sowakeup() primitives, it must 315 * maintain the same semantics. 316 */ 317 #define sorwakeup_locked(so) do { \ 318 SOCKBUF_LOCK_ASSERT(&(so)->so_rcv); \ 319 if (sb_notify(&(so)->so_rcv)) \ 320 sowakeup((so), &(so)->so_rcv); \ 321 else \ 322 SOCKBUF_UNLOCK(&(so)->so_rcv); \ 323 } while (0) 324 325 #define sorwakeup(so) do { \ 326 SOCKBUF_LOCK(&(so)->so_rcv); \ 327 sorwakeup_locked(so); \ 328 } while (0) 329 330 #define sowwakeup_locked(so) do { \ 331 SOCKBUF_LOCK_ASSERT(&(so)->so_snd); \ 332 if (sb_notify(&(so)->so_snd)) \ 333 sowakeup((so), &(so)->so_snd); \ 334 else \ 335 SOCKBUF_UNLOCK(&(so)->so_snd); \ 336 } while (0) 337 338 #define sowwakeup(so) do { \ 339 SOCKBUF_LOCK(&(so)->so_snd); \ 340 sowwakeup_locked(so); \ 341 } while (0) 342 343 struct accept_filter { 344 char accf_name[16]; 345 int (*accf_callback) 346 (struct socket *so, void *arg, int waitflag); 347 void * (*accf_create) 348 (struct socket *so, char *arg); 349 void (*accf_destroy) 350 (struct socket *so); 351 SLIST_ENTRY(accept_filter) accf_next; 352 }; 353 354 #define ACCEPT_FILTER_DEFINE(modname, filtname, cb, create, destroy, ver) \ 355 static struct accept_filter modname##_filter = { \ 356 .accf_name = filtname, \ 357 .accf_callback = cb, \ 358 .accf_create = create, \ 359 .accf_destroy = destroy, \ 360 }; \ 361 static moduledata_t modname##_mod = { \ 362 .name = __XSTRING(modname), \ 363 .evhand = accept_filt_generic_mod_event, \ 364 .priv = &modname##_filter, \ 365 }; \ 366 DECLARE_MODULE(modname, modname##_mod, SI_SUB_DRIVERS, \ 367 SI_ORDER_MIDDLE); \ 368 MODULE_VERSION(modname, ver) 369 370 #ifdef MALLOC_DECLARE 371 MALLOC_DECLARE(M_ACCF); 372 MALLOC_DECLARE(M_PCB); 373 MALLOC_DECLARE(M_SONAME); 374 #endif 375 376 /* 377 * Socket specific helper hook point identifiers 378 * Do not leave holes in the sequence, hook registration is a loop. 379 */ 380 #define HHOOK_SOCKET_OPT 0 381 #define HHOOK_SOCKET_CREATE 1 382 #define HHOOK_SOCKET_RCV 2 383 #define HHOOK_SOCKET_SND 3 384 #define HHOOK_FILT_SOREAD 4 385 #define HHOOK_FILT_SOWRITE 5 386 #define HHOOK_SOCKET_CLOSE 6 387 #define HHOOK_SOCKET_LAST HHOOK_SOCKET_CLOSE 388 389 struct socket_hhook_data { 390 struct socket *so; 391 struct mbuf *m; 392 void *hctx; /* hook point specific data*/ 393 int status; 394 }; 395 396 extern int maxsockets; 397 extern u_long sb_max; 398 extern so_gen_t so_gencnt; 399 400 struct file; 401 struct filecaps; 402 struct filedesc; 403 struct mbuf; 404 struct sockaddr; 405 struct ucred; 406 struct uio; 407 408 /* 'which' values for socket upcalls. */ 409 #define SO_RCV 1 410 #define SO_SND 2 411 412 /* Return values for socket upcalls. */ 413 #define SU_OK 0 414 #define SU_ISCONNECTED 1 415 416 /* 417 * From uipc_socket and friends 418 */ 419 int getsockaddr(struct sockaddr **namp, const struct sockaddr *uaddr, 420 size_t len); 421 int getsock_cap(struct thread *td, int fd, cap_rights_t *rightsp, 422 struct file **fpp, u_int *fflagp, struct filecaps *havecaps); 423 void soabort(struct socket *so); 424 int soaccept(struct socket *so, struct sockaddr **nam); 425 void soaio_enqueue(struct task *task); 426 void soaio_rcv(void *context, int pending); 427 void soaio_snd(void *context, int pending); 428 int socheckuid(struct socket *so, uid_t uid); 429 int sobind(struct socket *so, struct sockaddr *nam, struct thread *td); 430 int sobindat(int fd, struct socket *so, struct sockaddr *nam, 431 struct thread *td); 432 int soclose(struct socket *so); 433 int soconnect(struct socket *so, struct sockaddr *nam, struct thread *td); 434 int soconnectat(int fd, struct socket *so, struct sockaddr *nam, 435 struct thread *td); 436 int soconnect2(struct socket *so1, struct socket *so2); 437 int socreate(int dom, struct socket **aso, int type, int proto, 438 struct ucred *cred, struct thread *td); 439 int sodisconnect(struct socket *so); 440 void sodtor_set(struct socket *, so_dtor_t *); 441 struct sockaddr *sodupsockaddr(const struct sockaddr *sa, int mflags); 442 void sofree(struct socket *so); 443 void sohasoutofband(struct socket *so); 444 int solisten(struct socket *so, int backlog, struct thread *td); 445 void solisten_proto(struct socket *so, int backlog); 446 int solisten_proto_check(struct socket *so); 447 int solisten_dequeue(struct socket *, struct socket **, int); 448 struct socket * 449 sonewconn(struct socket *head, int connstatus); 450 struct socket * 451 sopeeloff(struct socket *); 452 int sopoll(struct socket *so, int events, struct ucred *active_cred, 453 struct thread *td); 454 int sopoll_generic(struct socket *so, int events, 455 struct ucred *active_cred, struct thread *td); 456 int soreceive(struct socket *so, struct sockaddr **paddr, struct uio *uio, 457 struct mbuf **mp0, struct mbuf **controlp, int *flagsp); 458 int soreceive_stream(struct socket *so, struct sockaddr **paddr, 459 struct uio *uio, struct mbuf **mp0, struct mbuf **controlp, 460 int *flagsp); 461 int soreceive_dgram(struct socket *so, struct sockaddr **paddr, 462 struct uio *uio, struct mbuf **mp0, struct mbuf **controlp, 463 int *flagsp); 464 int soreceive_generic(struct socket *so, struct sockaddr **paddr, 465 struct uio *uio, struct mbuf **mp0, struct mbuf **controlp, 466 int *flagsp); 467 int soreserve(struct socket *so, u_long sndcc, u_long rcvcc); 468 void sorflush(struct socket *so); 469 int sosend(struct socket *so, struct sockaddr *addr, struct uio *uio, 470 struct mbuf *top, struct mbuf *control, int flags, 471 struct thread *td); 472 int sosend_dgram(struct socket *so, struct sockaddr *addr, 473 struct uio *uio, struct mbuf *top, struct mbuf *control, 474 int flags, struct thread *td); 475 int sosend_generic(struct socket *so, struct sockaddr *addr, 476 struct uio *uio, struct mbuf *top, struct mbuf *control, 477 int flags, struct thread *td); 478 int soshutdown(struct socket *so, int how); 479 void soupcall_clear(struct socket *, int); 480 void soupcall_set(struct socket *, int, so_upcall_t, void *); 481 void solisten_upcall_set(struct socket *, so_upcall_t, void *); 482 void sowakeup(struct socket *so, struct sockbuf *sb); 483 void sowakeup_aio(struct socket *so, struct sockbuf *sb); 484 void solisten_wakeup(struct socket *); 485 int selsocket(struct socket *so, int events, struct timeval *tv, 486 struct thread *td); 487 void soisconnected(struct socket *so); 488 void soisconnecting(struct socket *so); 489 void soisdisconnected(struct socket *so); 490 void soisdisconnecting(struct socket *so); 491 void socantrcvmore(struct socket *so); 492 void socantrcvmore_locked(struct socket *so); 493 void socantsendmore(struct socket *so); 494 void socantsendmore_locked(struct socket *so); 495 void soroverflow(struct socket *so); 496 void soroverflow_locked(struct socket *so); 497 int soiolock(struct socket *so, struct sx *sx, int flags); 498 void soiounlock(struct sx *sx); 499 500 /* 501 * Accept filter functions (duh). 502 */ 503 int accept_filt_add(struct accept_filter *filt); 504 int accept_filt_del(char *name); 505 struct accept_filter *accept_filt_get(char *name); 506 #ifdef ACCEPT_FILTER_MOD 507 #ifdef SYSCTL_DECL 508 SYSCTL_DECL(_net_inet_accf); 509 #endif 510 int accept_filt_generic_mod_event(module_t mod, int event, void *data); 511 #endif 512 513 #endif /* _KERNEL */ 514 515 /* 516 * Structure to export socket from kernel to utilities, via sysctl(3). 517 */ 518 struct xsocket { 519 ksize_t xso_len; /* length of this structure */ 520 kvaddr_t xso_so; /* kernel address of struct socket */ 521 kvaddr_t so_pcb; /* kernel address of struct inpcb */ 522 uint64_t so_oobmark; 523 int64_t so_spare64[8]; 524 int32_t xso_protocol; 525 int32_t xso_family; 526 uint32_t so_qlen; 527 uint32_t so_incqlen; 528 uint32_t so_qlimit; 529 pid_t so_pgid; 530 uid_t so_uid; 531 int32_t so_spare32[8]; 532 int16_t so_type; 533 int16_t so_options; 534 int16_t so_linger; 535 int16_t so_state; 536 int16_t so_timeo; 537 uint16_t so_error; 538 struct xsockbuf { 539 uint32_t sb_cc; 540 uint32_t sb_hiwat; 541 uint32_t sb_mbcnt; 542 uint32_t sb_mcnt; 543 uint32_t sb_ccnt; 544 uint32_t sb_mbmax; 545 int32_t sb_lowat; 546 int32_t sb_timeo; 547 int16_t sb_flags; 548 } so_rcv, so_snd; 549 }; 550 551 #ifdef _KERNEL 552 void sotoxsocket(struct socket *so, struct xsocket *xso); 553 void sbtoxsockbuf(struct sockbuf *sb, struct xsockbuf *xsb); 554 #endif 555 556 /* 557 * Socket buffer state bits. Exported via libprocstat(3). 558 */ 559 #define SBS_CANTSENDMORE 0x0010 /* can't send more data to peer */ 560 #define SBS_CANTRCVMORE 0x0020 /* can't receive more data from peer */ 561 #define SBS_RCVATMARK 0x0040 /* at mark on input */ 562 563 #endif /* !_SYS_SOCKETVAR_H_ */ 564