FreeBSD/Linux Kernel Cross Reference
sys/sys/socket.h
1 /* $NetBSD: socket.h,v 1.68 2003/08/07 16:34:14 agc Exp $ */
2
3 /*
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * 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 project 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 PROJECT 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 PROJECT 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
32 /*
33 * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
34 * The Regents of the University of California. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 *
60 * @(#)socket.h 8.6 (Berkeley) 5/3/95
61 */
62
63 #ifndef _SYS_SOCKET_H_
64 #define _SYS_SOCKET_H_
65
66 #include <sys/featuretest.h>
67
68 /*
69 * Definitions related to sockets: types, address families, options.
70 */
71
72 /*
73 * Data types.
74 */
75 #include <sys/ansi.h>
76
77 #ifndef sa_family_t
78 typedef __sa_family_t sa_family_t;
79 #define sa_family_t __sa_family_t
80 #endif
81
82 #ifndef socklen_t
83 typedef __socklen_t socklen_t;
84 #define socklen_t __socklen_t
85 #endif
86
87 #include <machine/ansi.h>
88
89 #ifdef _BSD_SIZE_T_
90 typedef _BSD_SIZE_T_ size_t;
91 #undef _BSD_SIZE_T_
92 #endif
93
94 #ifdef _BSD_SSIZE_T_
95 typedef _BSD_SSIZE_T_ ssize_t;
96 #undef _BSD_SSIZE_T_
97 #endif
98
99 #include <sys/uio.h>
100
101 /*
102 * Socket types.
103 */
104 #define SOCK_STREAM 1 /* stream socket */
105 #define SOCK_DGRAM 2 /* datagram socket */
106 #define SOCK_RAW 3 /* raw-protocol interface */
107 #define SOCK_RDM 4 /* reliably-delivered message */
108 #define SOCK_SEQPACKET 5 /* sequenced packet stream */
109
110 /*
111 * Option flags per-socket.
112 */
113 #define SO_DEBUG 0x0001 /* turn on debugging info recording */
114 #define SO_ACCEPTCONN 0x0002 /* socket has had listen() */
115 #define SO_REUSEADDR 0x0004 /* allow local address reuse */
116 #define SO_KEEPALIVE 0x0008 /* keep connections alive */
117 #define SO_DONTROUTE 0x0010 /* just use interface addresses */
118 #define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */
119 #define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */
120 #define SO_LINGER 0x0080 /* linger on close if data present */
121 #define SO_OOBINLINE 0x0100 /* leave received OOB data in line */
122 #define SO_REUSEPORT 0x0200 /* allow local address & port reuse */
123 #define SO_TIMESTAMP 0x0400 /* timestamp received dgram traffic */
124
125 /*
126 * Additional options, not kept in so_options.
127 */
128 #define SO_SNDBUF 0x1001 /* send buffer size */
129 #define SO_RCVBUF 0x1002 /* receive buffer size */
130 #define SO_SNDLOWAT 0x1003 /* send low-water mark */
131 #define SO_RCVLOWAT 0x1004 /* receive low-water mark */
132 #define SO_SNDTIMEO 0x1005 /* send timeout */
133 #define SO_RCVTIMEO 0x1006 /* receive timeout */
134 #define SO_ERROR 0x1007 /* get error status and clear */
135 #define SO_TYPE 0x1008 /* get socket type */
136
137 /*
138 * Structure used for manipulating linger option.
139 */
140 struct linger {
141 int l_onoff; /* option on/off */
142 int l_linger; /* linger time in seconds */
143 };
144
145 /*
146 * Level number for (get/set)sockopt() to apply to socket itself.
147 */
148 #define SOL_SOCKET 0xffff /* options for socket level */
149
150 /*
151 * Address families.
152 */
153 #define AF_UNSPEC 0 /* unspecified */
154 #define AF_LOCAL 1 /* local to host (pipes, portals) */
155 #define AF_UNIX AF_LOCAL /* backward compatibility */
156 #define AF_INET 2 /* internetwork: UDP, TCP, etc. */
157 #define AF_IMPLINK 3 /* arpanet imp addresses */
158 #define AF_PUP 4 /* pup protocols: e.g. BSP */
159 #define AF_CHAOS 5 /* mit CHAOS protocols */
160 #define AF_NS 6 /* XEROX NS protocols */
161 #define AF_ISO 7 /* ISO protocols */
162 #define AF_OSI AF_ISO
163 #define AF_ECMA 8 /* european computer manufacturers */
164 #define AF_DATAKIT 9 /* datakit protocols */
165 #define AF_CCITT 10 /* CCITT protocols, X.25 etc */
166 #define AF_SNA 11 /* IBM SNA */
167 #define AF_DECnet 12 /* DECnet */
168 #define AF_DLI 13 /* DEC Direct data link interface */
169 #define AF_LAT 14 /* LAT */
170 #define AF_HYLINK 15 /* NSC Hyperchannel */
171 #define AF_APPLETALK 16 /* Apple Talk */
172 #define AF_ROUTE 17 /* Internal Routing Protocol */
173 #define AF_LINK 18 /* Link layer interface */
174 #if defined(_NETBSD_SOURCE)
175 #define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */
176 #endif
177 #define AF_COIP 20 /* connection-oriented IP, aka ST II */
178 #define AF_CNT 21 /* Computer Network Technology */
179 #if defined(_NETBSD_SOURCE)
180 #define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */
181 #endif
182 #define AF_IPX 23 /* Novell Internet Protocol */
183 #define AF_INET6 24 /* IP version 6 */
184 #if defined(_NETBSD_SOURCE)
185 #define pseudo_AF_PIP 25 /* Help Identify PIP packets */
186 #endif
187 #define AF_ISDN 26 /* Integrated Services Digital Network*/
188 #define AF_E164 AF_ISDN /* CCITT E.164 recommendation */
189 #define AF_NATM 27 /* native ATM access */
190 #define AF_ARP 28 /* (rev.) addr. res. prot. (RFC 826) */
191 #if defined(_NETBSD_SOURCE)
192 #define pseudo_AF_KEY 29 /* Internal key management protocol */
193 #define pseudo_AF_HDRCMPLT 30 /* Used by BPF to not rewrite hdrs
194 in interface output routine */
195 #endif
196
197 #define AF_MAX 31
198
199 /*
200 * Structure used by kernel to store most
201 * addresses.
202 */
203 struct sockaddr {
204 __uint8_t sa_len; /* total length */
205 sa_family_t sa_family; /* address family */
206 char sa_data[14]; /* actually longer; address value */
207 };
208
209 #if defined(_KERNEL)
210 /*
211 * Structure used by kernel to pass protocol
212 * information in raw sockets.
213 */
214 struct sockproto {
215 u_short sp_family; /* address family */
216 u_short sp_protocol; /* protocol */
217 };
218 #endif /* _KERNEL */
219
220 #if 1
221 /*
222 * RFC 2553: protocol-independent placeholder for socket addresses
223 */
224 #define _SS_MAXSIZE 128
225 #define _SS_ALIGNSIZE (sizeof(__int64_t))
226 #define _SS_PAD1SIZE (_SS_ALIGNSIZE - 2)
227 #define _SS_PAD2SIZE (_SS_MAXSIZE - 2 - \
228 _SS_PAD1SIZE - _SS_ALIGNSIZE)
229
230 #if (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
231 struct sockaddr_storage {
232 __uint8_t ss_len; /* address length */
233 sa_family_t ss_family; /* address family */
234 char __ss_pad1[_SS_PAD1SIZE];
235 __int64_t __ss_align;/* force desired structure storage alignment */
236 char __ss_pad2[_SS_PAD2SIZE];
237 };
238 #endif /* _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
239 #endif /* 1 */
240
241 /*
242 * Protocol families, same as address families for now.
243 */
244 #define PF_UNSPEC AF_UNSPEC
245 #define PF_LOCAL AF_LOCAL
246 #define PF_UNIX PF_LOCAL /* backward compatibility */
247 #define PF_INET AF_INET
248 #define PF_IMPLINK AF_IMPLINK
249 #define PF_PUP AF_PUP
250 #define PF_CHAOS AF_CHAOS
251 #define PF_NS AF_NS
252 #define PF_ISO AF_ISO
253 #define PF_OSI AF_ISO
254 #define PF_ECMA AF_ECMA
255 #define PF_DATAKIT AF_DATAKIT
256 #define PF_CCITT AF_CCITT
257 #define PF_SNA AF_SNA
258 #define PF_DECnet AF_DECnet
259 #define PF_DLI AF_DLI
260 #define PF_LAT AF_LAT
261 #define PF_HYLINK AF_HYLINK
262 #define PF_APPLETALK AF_APPLETALK
263 #define PF_ROUTE AF_ROUTE
264 #define PF_LINK AF_LINK
265 #if defined(_NETBSD_SOURCE)
266 #define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */
267 #endif
268 #define PF_COIP AF_COIP
269 #define PF_CNT AF_CNT
270 #define PF_INET6 AF_INET6
271 #define PF_IPX AF_IPX /* same format as AF_NS */
272 #if defined(_NETBSD_SOURCE)
273 #define PF_RTIP pseudo_AF_FTIP /* same format as AF_INET */
274 #define PF_PIP pseudo_AF_PIP
275 #endif
276 #define PF_ISDN AF_ISDN /* same as E164 */
277 #define PF_E164 AF_E164
278 #define PF_NATM AF_NATM
279 #define PF_ARP AF_ARP
280 #if defined(_NETBSD_SOURCE)
281 #define PF_KEY pseudo_AF_KEY /* like PF_ROUTE, only for key mgmt */
282 #endif
283
284 #define PF_MAX AF_MAX
285
286 #if defined(_NETBSD_SOURCE)
287
288 #ifndef gid_t
289 typedef __gid_t gid_t; /* group id */
290 #define gid_t __gid_t
291 #endif
292
293 #ifndef uid_t
294 typedef __uid_t uid_t; /* user id */
295 #define uid_t __uid_t
296 #endif
297
298 /*
299 * Socket credentials.
300 */
301 struct sockcred {
302 uid_t sc_uid; /* real user id */
303 uid_t sc_euid; /* effective user id */
304 gid_t sc_gid; /* real group id */
305 gid_t sc_egid; /* effective group id */
306 int sc_ngroups; /* number of supplemental groups */
307 gid_t sc_groups[1]; /* variable length */
308 };
309
310 /*
311 * Compute size of a sockcred structure with groups.
312 */
313 #define SOCKCREDSIZE(ngrps) \
314 (sizeof(struct sockcred) + (sizeof(gid_t) * ((ngrps) - 1)))
315 #endif /* _NETBSD_SOURCE */
316
317
318 #if defined(_NETBSD_SOURCE)
319 /*
320 * Definitions for network related sysctl, CTL_NET.
321 *
322 * Second level is protocol family.
323 * Third level is protocol number.
324 *
325 * Further levels are defined by the individual families below.
326 */
327 #define NET_MAXID AF_MAX
328
329 #define CTL_NET_NAMES { \
330 { 0, 0 }, \
331 { "local", CTLTYPE_NODE }, \
332 { "inet", CTLTYPE_NODE }, \
333 { "implink", CTLTYPE_NODE }, \
334 { "pup", CTLTYPE_NODE }, \
335 { "chaos", CTLTYPE_NODE }, \
336 { "xerox_ns", CTLTYPE_NODE }, \
337 { "iso", CTLTYPE_NODE }, \
338 { "emca", CTLTYPE_NODE }, \
339 { "datakit", CTLTYPE_NODE }, \
340 { "ccitt", CTLTYPE_NODE }, \
341 { "ibm_sna", CTLTYPE_NODE }, \
342 { "decnet", CTLTYPE_NODE }, \
343 { "dec_dli", CTLTYPE_NODE }, \
344 { "lat", CTLTYPE_NODE }, \
345 { "hylink", CTLTYPE_NODE }, \
346 { "appletalk", CTLTYPE_NODE }, \
347 { "route", CTLTYPE_NODE }, \
348 { "link_layer", CTLTYPE_NODE }, \
349 { "xtp", CTLTYPE_NODE }, \
350 { "coip", CTLTYPE_NODE }, \
351 { "cnt", CTLTYPE_NODE }, \
352 { "rtip", CTLTYPE_NODE }, \
353 { "ipx", CTLTYPE_NODE }, \
354 { "inet6", CTLTYPE_NODE }, \
355 { "pip", CTLTYPE_NODE }, \
356 { "isdn", CTLTYPE_NODE }, \
357 { "natm", CTLTYPE_NODE }, \
358 { "arp", CTLTYPE_NODE }, \
359 { "key", CTLTYPE_NODE }, \
360 }
361 #endif /* _NETBSD_SOURCE */
362
363 #if defined(_NETBSD_SOURCE)
364 /*
365 * PF_ROUTE - Routing table
366 *
367 * Three additional levels are defined:
368 * Fourth: address family, 0 is wildcard
369 * Fifth: type of info, defined below
370 * Sixth: flag(s) to mask with for NET_RT_FLAGS
371 */
372 #define NET_RT_DUMP 1 /* dump; may limit to a.f. */
373 #define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
374 #define NET_RT_OIFLIST 3 /* old NET_RT_IFLIST (pre 1.5) */
375 #define NET_RT_IFLIST 4 /* survey interface list */
376 #define NET_RT_MAXID 5
377
378 #define CTL_NET_RT_NAMES { \
379 { 0, 0 }, \
380 { "dump", CTLTYPE_STRUCT }, \
381 { "flags", CTLTYPE_STRUCT }, \
382 { 0, 0 }, \
383 { "iflist", CTLTYPE_STRUCT }, \
384 }
385 #endif /* _NETBSD_SOURCE */
386
387 /*
388 * Maximum queue length specifiable by listen(2).
389 */
390 #ifndef SOMAXCONN
391 #define SOMAXCONN 128
392 #endif
393
394 /*
395 * Message header for recvmsg and sendmsg calls.
396 * Used value-result for recvmsg, value only for sendmsg.
397 */
398 struct msghdr {
399 void *msg_name; /* optional address */
400 socklen_t msg_namelen; /* size of address */
401 struct iovec *msg_iov; /* scatter/gather array */
402 int msg_iovlen; /* # elements in msg_iov */
403 void *msg_control; /* ancillary data, see below */
404 socklen_t msg_controllen; /* ancillary data buffer len */
405 int msg_flags; /* flags on received message */
406 };
407
408 #define MSG_OOB 0x1 /* process out-of-band data */
409 #define MSG_PEEK 0x2 /* peek at incoming message */
410 #define MSG_DONTROUTE 0x4 /* send without using routing tables */
411 #define MSG_EOR 0x8 /* data completes record */
412 #define MSG_TRUNC 0x10 /* data discarded before delivery */
413 #define MSG_CTRUNC 0x20 /* control data lost before delivery */
414 #define MSG_WAITALL 0x40 /* wait for full request or error */
415 #define MSG_DONTWAIT 0x80 /* this message should be nonblocking */
416 #define MSG_BCAST 0x100 /* this message was rcvd using link-level brdcst */
417 #define MSG_MCAST 0x200 /* this message was rcvd using link-level mcast */
418
419 /*
420 * Header for ancillary data objects in msg_control buffer.
421 * Used for additional information with/about a datagram
422 * not expressible by flags. The format is a sequence
423 * of message elements headed by cmsghdr structures.
424 */
425 struct cmsghdr {
426 socklen_t cmsg_len; /* data byte count, including hdr */
427 int cmsg_level; /* originating protocol */
428 int cmsg_type; /* protocol-specific type */
429 /* followed by u_char cmsg_data[]; */
430 };
431
432 /* given pointer to struct cmsghdr, return pointer to data */
433 #define CMSG_DATA(cmsg) \
434 ((u_char *)(void *)(cmsg) + __CMSG_ALIGN(sizeof(struct cmsghdr)))
435
436 /*
437 * Alignment requirement for CMSG struct manipulation.
438 * This basically behaves the same as ALIGN() ARCH/include/param.h.
439 * We declare it separately for two reasons:
440 * (1) avoid dependency between machine/param.h, and (2) to sync with kernel's
441 * idea of ALIGNBYTES at runtime.
442 * without (2), we can't guarantee binary compatibility in case of future
443 * changes in ALIGNBYTES.
444 */
445 #define __CMSG_ALIGN(n) (((n) + __cmsg_alignbytes()) & ~__cmsg_alignbytes())
446 #ifdef _KERNEL
447 #define CMSG_ALIGN(n) __CMSG_ALIGN(n)
448 #endif
449
450 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
451 #define CMSG_NXTHDR(mhdr, cmsg) \
452 (((__caddr_t)(cmsg) + __CMSG_ALIGN((cmsg)->cmsg_len) + \
453 __CMSG_ALIGN(sizeof(struct cmsghdr)) > \
454 (((__caddr_t)(mhdr)->msg_control) + (mhdr)->msg_controllen)) ? \
455 (struct cmsghdr *)NULL : \
456 (struct cmsghdr *)((__caddr_t)(cmsg) + \
457 __CMSG_ALIGN((cmsg)->cmsg_len)))
458
459 /*
460 * RFC 2292 requires to check msg_controllen, in case that the kernel returns
461 * an empty list for some reasons.
462 */
463 #define CMSG_FIRSTHDR(mhdr) \
464 ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
465 (struct cmsghdr *)(mhdr)->msg_control : \
466 (struct cmsghdr *)NULL)
467
468 #define CMSG_SPACE(l) (__CMSG_ALIGN(sizeof(struct cmsghdr)) + __CMSG_ALIGN(l))
469 #define CMSG_LEN(l) (__CMSG_ALIGN(sizeof(struct cmsghdr)) + (l))
470
471 /* "Socket"-level control message types: */
472 #define SCM_RIGHTS 0x01 /* access rights (array of int) */
473 #if defined(_NETBSD_SOURCE)
474 #define SCM_TIMESTAMP 0x02 /* timestamp (struct timeval) */
475 #define SCM_CREDS 0x04 /* credentials (struct sockcred) */
476 #endif
477
478 /*
479 * Types of socket shutdown(2).
480 */
481 #define SHUT_RD 0 /* Disallow further receives. */
482 #define SHUT_WR 1 /* Disallow further sends. */
483 #define SHUT_RDWR 2 /* Disallow further sends/receives. */
484
485 #if defined(_NETBSD_SOURCE)
486 /*
487 * 4.3 compat sockaddr, move to compat file later
488 */
489 struct osockaddr {
490 __uint16_t sa_family; /* address family */
491 char sa_data[14]; /* up to 14 bytes of direct address */
492 };
493
494 /*
495 * 4.3-compat message header (move to compat file later).
496 */
497 struct omsghdr {
498 __caddr_t msg_name; /* optional address */
499 int msg_namelen; /* size of address */
500 struct iovec *msg_iov; /* scatter/gather array */
501 int msg_iovlen; /* # elements in msg_iov */
502 __caddr_t msg_accrights; /* access rights sent/received */
503 int msg_accrightslen;
504 };
505 #endif
506
507 #include <sys/cdefs.h>
508
509 __BEGIN_DECLS
510 int __cmsg_alignbytes __P((void));
511 __END_DECLS
512
513 #ifndef _KERNEL
514
515 __BEGIN_DECLS
516 int accept __P((int, struct sockaddr * __restrict, socklen_t * __restrict));
517 int bind __P((int, const struct sockaddr *, socklen_t));
518 int connect __P((int, const struct sockaddr *, socklen_t));
519 int getpeername __P((int, struct sockaddr * __restrict,
520 socklen_t * __restrict));
521 int getsockname __P((int, struct sockaddr * __restrict,
522 socklen_t * __restrict));
523 int getsockopt __P((int, int, int, void * __restrict,
524 socklen_t * __restrict));
525 int listen __P((int, int));
526 ssize_t recv __P((int, void *, size_t, int));
527 ssize_t recvfrom __P((int, void * __restrict, size_t, int,
528 struct sockaddr * __restrict, socklen_t * __restrict));
529 ssize_t recvmsg __P((int, struct msghdr *, int));
530 ssize_t send __P((int, const void *, size_t, int));
531 ssize_t sendto __P((int, const void *,
532 size_t, int, const struct sockaddr *, socklen_t));
533 ssize_t sendmsg __P((int, const struct msghdr *, int));
534 int setsockopt __P((int, int, int, const void *, socklen_t));
535 int shutdown __P((int, int));
536 int sockatmark __P((int));
537 int socket __P((int, int, int));
538 int socketpair __P((int, int, int, int *));
539 __END_DECLS
540 #endif /* !_KERNEL */
541
542 #endif /* !_SYS_SOCKET_H_ */
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