FreeBSD/Linux Kernel Cross Reference
sys/sys/socketvar.h
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: releng/6.3/sys/sys/socketvar.h 173886 2007-11-24 19:45:58Z cvs2svn $
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 */
47 typedef 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 */
60 struct 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; /* (b) 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 */
160 extern 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 */
228 struct 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 */
410 enum sopt_dir { SOPT_GET, SOPT_SET };
411 struct 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
420 struct 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
432 MALLOC_DECLARE(M_ACCF);
433 MALLOC_DECLARE(M_PCB);
434 MALLOC_DECLARE(M_SONAME);
435 #endif
436
437 extern int maxsockets;
438 extern u_long sb_max;
439 extern struct uma_zone *socket_zone;
440 extern so_gen_t so_gencnt;
441
442 struct mbuf;
443 struct sockaddr;
444 struct ucred;
445 struct uio;
446
447 /*
448 * From uipc_socket and friends
449 */
450 int do_getopt_accept_filter(struct socket *so, struct sockopt *sopt);
451 int do_setopt_accept_filter(struct socket *so, struct sockopt *sopt);
452 int so_setsockopt(struct socket *so, int level, int optname,
453 void *optval, size_t optlen);
454 int sockargs(struct mbuf **mp, caddr_t buf, int buflen, int type);
455 int getsockaddr(struct sockaddr **namp, caddr_t uaddr, size_t len);
456 void sbappend(struct sockbuf *sb, struct mbuf *m);
457 void sbappend_locked(struct sockbuf *sb, struct mbuf *m);
458 void sbappendstream(struct sockbuf *sb, struct mbuf *m);
459 void sbappendstream_locked(struct sockbuf *sb, struct mbuf *m);
460 int sbappendaddr(struct sockbuf *sb, const struct sockaddr *asa,
461 struct mbuf *m0, struct mbuf *control);
462 int sbappendaddr_locked(struct sockbuf *sb, const struct sockaddr *asa,
463 struct mbuf *m0, struct mbuf *control);
464 int sbappendcontrol(struct sockbuf *sb, struct mbuf *m0,
465 struct mbuf *control);
466 int sbappendcontrol_locked(struct sockbuf *sb, struct mbuf *m0,
467 struct mbuf *control);
468 void sbappendrecord(struct sockbuf *sb, struct mbuf *m0);
469 void sbappendrecord_locked(struct sockbuf *sb, struct mbuf *m0);
470 void sbcheck(struct sockbuf *sb);
471 void sbcompress(struct sockbuf *sb, struct mbuf *m, struct mbuf *n);
472 struct mbuf *
473 sbcreatecontrol(caddr_t p, int size, int type, int level);
474 void sbdrop(struct sockbuf *sb, int len);
475 void sbdrop_locked(struct sockbuf *sb, int len);
476 void sbdroprecord(struct sockbuf *sb);
477 void sbdroprecord_locked(struct sockbuf *sb);
478 void sbflush(struct sockbuf *sb);
479 void sbflush_locked(struct sockbuf *sb);
480 void sbrelease(struct sockbuf *sb, struct socket *so);
481 void sbrelease_locked(struct sockbuf *sb, struct socket *so);
482 int sbreserve(struct sockbuf *sb, u_long cc, struct socket *so,
483 struct thread *td);
484 int sbreserve_locked(struct sockbuf *sb, u_long cc, struct socket *so,
485 struct thread *td);
486 void sbtoxsockbuf(struct sockbuf *sb, struct xsockbuf *xsb);
487 int sbwait(struct sockbuf *sb);
488 int sb_lock(struct sockbuf *sb);
489 int soabort(struct socket *so);
490 int soaccept(struct socket *so, struct sockaddr **nam);
491 struct socket *soalloc(void);
492 int socheckuid(struct socket *so, uid_t uid);
493 int sobind(struct socket *so, struct sockaddr *nam, struct thread *td);
494 void socantrcvmore(struct socket *so);
495 void socantrcvmore_locked(struct socket *so);
496 void socantsendmore(struct socket *so);
497 void socantsendmore_locked(struct socket *so);
498 int soclose(struct socket *so);
499 int soconnect(struct socket *so, struct sockaddr *nam, struct thread *td);
500 int soconnect2(struct socket *so1, struct socket *so2);
501 int socow_setup(struct mbuf *m0, struct uio *uio);
502 int socreate(int dom, struct socket **aso, int type, int proto,
503 struct ucred *cred, struct thread *td);
504 void sodealloc(struct socket *so);
505 int sodisconnect(struct socket *so);
506 struct sockaddr *sodupsockaddr(const struct sockaddr *sa, int mflags);
507 void sofree(struct socket *so);
508 int sogetopt(struct socket *so, struct sockopt *sopt);
509 void sohasoutofband(struct socket *so);
510 void soisconnected(struct socket *so);
511 void soisconnecting(struct socket *so);
512 void soisdisconnected(struct socket *so);
513 void soisdisconnecting(struct socket *so);
514 int solisten(struct socket *so, int backlog, struct thread *td);
515 void solisten_proto(struct socket *so);
516 int solisten_proto_check(struct socket *so);
517 struct socket *
518 sonewconn(struct socket *head, int connstatus);
519 int sooptcopyin(struct sockopt *sopt, void *buf, size_t len, size_t minlen);
520 int sooptcopyout(struct sockopt *sopt, const void *buf, size_t len);
521
522 /* XXX; prepare mbuf for (__FreeBSD__ < 3) routines. */
523 int soopt_getm(struct sockopt *sopt, struct mbuf **mp);
524 int soopt_mcopyin(struct sockopt *sopt, struct mbuf *m);
525 int soopt_mcopyout(struct sockopt *sopt, struct mbuf *m);
526
527 int sopoll(struct socket *so, int events, struct ucred *active_cred,
528 struct thread *td);
529 int soreceive(struct socket *so, struct sockaddr **paddr, struct uio *uio,
530 struct mbuf **mp0, struct mbuf **controlp, int *flagsp);
531 int soreserve(struct socket *so, u_long sndcc, u_long rcvcc);
532 void sorflush(struct socket *so);
533 int sosend(struct socket *so, struct sockaddr *addr, struct uio *uio,
534 struct mbuf *top, struct mbuf *control, int flags,
535 struct thread *td);
536 int sosetopt(struct socket *so, struct sockopt *sopt);
537 int soshutdown(struct socket *so, int how);
538 void sotoxsocket(struct socket *so, struct xsocket *xso);
539 void sowakeup(struct socket *so, struct sockbuf *sb);
540
541 #ifdef SOCKBUF_DEBUG
542 void sblastrecordchk(struct sockbuf *, const char *, int);
543 #define SBLASTRECORDCHK(sb) sblastrecordchk((sb), __FILE__, __LINE__)
544
545 void sblastmbufchk(struct sockbuf *, const char *, int);
546 #define SBLASTMBUFCHK(sb) sblastmbufchk((sb), __FILE__, __LINE__)
547 #else
548 #define SBLASTRECORDCHK(sb) /* nothing */
549 #define SBLASTMBUFCHK(sb) /* nothing */
550 #endif /* SOCKBUF_DEBUG */
551
552 /*
553 * Accept filter functions (duh).
554 */
555 int accept_filt_add(struct accept_filter *filt);
556 int accept_filt_del(char *name);
557 struct accept_filter *accept_filt_get(char *name);
558 #ifdef ACCEPT_FILTER_MOD
559 #ifdef SYSCTL_DECL
560 SYSCTL_DECL(_net_inet_accf);
561 #endif
562 int accept_filt_generic_mod_event(module_t mod, int event, void *data);
563 #endif
564
565 #endif /* _KERNEL */
566
567 #endif /* !_SYS_SOCKETVAR_H_ */
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