xref: /titanic_51/usr/src/uts/common/sys/socket.h (revision e71ca95ca6de23d33b54cb55cefdef30bc7c969b)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
27 /*	  All Rights Reserved	*/
28 
29 /*
30  * University Copyright- Copyright (c) 1982, 1986, 1988
31  * The Regents of the University of California
32  * All Rights Reserved
33  *
34  * University Acknowledgment- Portions of this document are derived from
35  * software developed by the University of California, Berkeley, and its
36  * contributors.
37  */
38 
39 #ifndef	_SYS_SOCKET_H
40 #define	_SYS_SOCKET_H
41 
42 #include <sys/types.h>
43 #include <sys/uio.h>
44 #include <sys/feature_tests.h>
45 #include <sys/socket_impl.h>
46 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
47 #ifndef	_KERNEL
48 #include <sys/netconfig.h>
49 #endif	/* !_KERNEL */
50 #include <netinet/in.h>
51 #endif	/* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
52 
53 #ifdef	__cplusplus
54 extern "C" {
55 #endif
56 
57 #ifndef	_SOCKLEN_T
58 #define	_SOCKLEN_T
59 
60 /*
61  * The socklen definitions are reproduced in netinet/in.h for the inet6_
62  * functions.  Exposing all of sys/socket.h via netinet/in.h breaks existing
63  * applications and is not required by austin.
64  */
65 #if defined(_XPG4_2) && !defined(_XPG5) && !defined(_LP64)
66 typedef	size_t		socklen_t;
67 #else
68 typedef	uint32_t	socklen_t;
69 #endif	/* defined(_XPG4_2) && !defined(_XPG5) && !defined(_LP64) */
70 
71 #if defined(_XPG4_2) || defined(_BOOT)
72 typedef	socklen_t	*_RESTRICT_KYWD Psocklen_t;
73 #else
74 typedef	void		*_RESTRICT_KYWD Psocklen_t;
75 #endif	/* defined(_XPG4_2) || defined(_BOOT) */
76 
77 #endif	/* _SOCKLEN_T */
78 
79 /*
80  * Definitions related to sockets: types, address families, options.
81  */
82 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
83 #ifndef	NC_TPI_CLTS
84 #define	NC_TPI_CLTS	1		/* must agree with netconfig.h */
85 #define	NC_TPI_COTS	2		/* must agree with netconfig.h */
86 #define	NC_TPI_COTS_ORD	3		/* must agree with netconfig.h */
87 #define	NC_TPI_RAW	4		/* must agree with netconfig.h */
88 #endif	/* !NC_TPI_CLTS */
89 #endif	/* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
90 
91 /*
92  * Types
93  */
94 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
95 #define	SOCK_STREAM	NC_TPI_COTS	/* stream socket */
96 #define	SOCK_DGRAM	NC_TPI_CLTS	/* datagram socket */
97 #define	SOCK_RAW	NC_TPI_RAW	/* raw-protocol interface */
98 #else
99 #define	SOCK_STREAM	2		/* stream socket */
100 #define	SOCK_DGRAM	1		/* datagram socket */
101 #define	SOCK_RAW	4		/* raw-protocol interface */
102 #endif	/* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
103 #define	SOCK_RDM	5		/* reliably-delivered message */
104 #define	SOCK_SEQPACKET	6		/* sequenced packet stream */
105 
106 /*
107  * Option flags per-socket.
108  */
109 #define	SO_DEBUG	0x0001		/* turn on debugging info recording */
110 #define	SO_ACCEPTCONN	0x0002		/* socket has had listen() */
111 #define	SO_REUSEADDR	0x0004		/* allow local address reuse */
112 #define	SO_KEEPALIVE	0x0008		/* keep connections alive */
113 #define	SO_DONTROUTE	0x0010		/* just use interface addresses */
114 #define	SO_BROADCAST	0x0020		/* permit sending of broadcast msgs */
115 #define	SO_USELOOPBACK	0x0040		/* bypass hardware when possible */
116 #define	SO_LINGER	0x0080		/* linger on close if data present */
117 #define	SO_OOBINLINE	0x0100		/* leave received OOB data in line */
118 #define	SO_DGRAM_ERRIND	0x0200		/* Application wants delayed error */
119 #define	SO_RECVUCRED	0x0400		/* Application wants ucred of sender */
120 
121 /*
122  * Socket options are passed using a signed integer, but it is also rare
123  * for more than one to ever be passed at the same time with setsockopt
124  * and only one at a time can be retrieved with getsockopt.
125  *
126  * Since the lower numbers cannot be renumbered for compatibility reasons,
127  * it would seem that we need to start a new number space (0x40000000 -
128  * 0x7fffffff) for those that don't need to be stored as a bit flag
129  * somewhere. This limits the flag options to 30 but that seems to be
130  * plenty, anyway. 0x40000000 is reserved for future use.
131  */
132 #define	SO_ATTACH_FILTER	0x40000001
133 #define	SO_DETACH_FILTER	0x40000002
134 
135 #ifdef _KERNEL
136 #define	SO_SND_COPYAVOID 0x0800		/* Internal: use zero-copy */
137 #define	SO_SND_BUFINFO	0x1000		/* Internal: get buffer info */
138 					/* when doing zero-copy */
139 
140 struct so_snd_bufinfo {
141 	ushort_t	sbi_wroff; 	/* Write offset */
142 	ssize_t		sbi_maxblk;	/* Max size of a single mblk */
143 	ssize_t		sbi_maxpsz;	/* Max total size of a mblk chain */
144 	ushort_t	sbi_tail;	/* Extra space available at the end */
145 };
146 #endif /* _KERNEL */
147 
148 /*
149  * N.B.: The following definition is present only for compatibility
150  * with release 3.0.  It will disappear in later releases.
151  */
152 #define	SO_DONTLINGER	(~SO_LINGER)	/* ~SO_LINGER */
153 
154 /*
155  * Additional options, not kept in so_options.
156  */
157 #define	SO_SNDBUF	0x1001		/* send buffer size */
158 #define	SO_RCVBUF	0x1002		/* receive buffer size */
159 #define	SO_SNDLOWAT	0x1003		/* send low-water mark */
160 #define	SO_RCVLOWAT	0x1004		/* receive low-water mark */
161 #define	SO_SNDTIMEO	0x1005		/* send timeout */
162 #define	SO_RCVTIMEO	0x1006		/* receive timeout */
163 #define	SO_ERROR	0x1007		/* get error status and clear */
164 #define	SO_TYPE		0x1008		/* get socket type */
165 #define	SO_PROTOTYPE	0x1009		/* get/set protocol type */
166 #define	SO_ANON_MLP	0x100a		/* create MLP on anonymous bind */
167 #define	SO_MAC_EXEMPT	0x100b		/* allow dominated unlabeled peers */
168 #define	SO_DOMAIN	0x100c		/* get socket domain */
169 #define	SO_RCVPSH	0x100d		/* receive interval to push data */
170 
171 /* "Socket"-level control message types: */
172 #define	SCM_RIGHTS	0x1010		/* access rights (array of int) */
173 #define	SO_SECATTR	0x1011		/* socket's security attributes */
174 #define	SCM_UCRED	0x1012		/* sender's ucred */
175 #define	SO_TIMESTAMP	0x1013		/* socket-level timestamp option */
176 #define	SCM_TIMESTAMP	SO_TIMESTAMP	/* socket control message timestamp */
177 #define	SO_ALLZONES	0x1014		/* bind in all zones */
178 #define	SO_EXCLBIND	0x1015		/* exclusive binding */
179 
180 #ifdef	_KERNEL
181 #define	SO_SRCADDR	0x2001		/* Internal: AF_UNIX source address */
182 #define	SO_FILEP	0x2002		/* Internal: AF_UNIX file pointer */
183 #define	SO_UNIX_CLOSE	0x2003		/* Internal: AF_UNIX peer closed */
184 #endif	/* _KERNEL */
185 
186 #ifdef	_KERNEL
187 /*
188  * new socket open flags to identify socket and acceptor streams
189  */
190 #define	SO_ACCEPTOR	0x20000		/* acceptor socket */
191 #define	SO_SOCKSTR	0x40000		/* normal socket stream */
192 #define	SO_FALLBACK	0x80000		/* fallback to TPI socket */
193 
194 /*
195  * Flags for socket_create() and socket_newconn()
196  */
197 #define	SOCKET_SLEEP	KM_SLEEP
198 #define	SOCKET_NOSLEEP	KM_NOSLEEP
199 
200 
201 /*
202  * flags used by sockfs when falling back to tpi socket
203  */
204 #define	SO_FB_START	0x1
205 #define	SO_FB_FINISH	0x2
206 
207 #endif	/* _KERNEL */
208 
209 /*
210  * Structure used for manipulating linger option.
211  */
212 struct	linger {
213 	int	l_onoff;		/* option on/off */
214 	int	l_linger;		/* linger time */
215 };
216 
217 /*
218  * Levels for (get/set)sockopt() that don't apply to a specific protocol.
219  */
220 #define	SOL_SOCKET	0xffff		/* options for socket level */
221 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
222 #define	SOL_ROUTE	0xfffe		/* options for routing socket level */
223 #endif
224 #define	SOL_PACKET	0xfffd		/* options for packet level */
225 
226 /*
227  * Address families.
228  *
229  * Some of these constant names are copied for the DTrace IP provider in
230  * usr/src/lib/libdtrace/common/{ip.d.in, ip.sed.in}, which should be kept
231  * in sync.
232  */
233 #define	AF_UNSPEC	0		/* unspecified */
234 #define	AF_UNIX		1		/* local to host (pipes, portals) */
235 #define	AF_LOCAL	AF_UNIX		/* Synonym for AF_UNIX */
236 #define	AF_FILE		AF_UNIX		/* Synonym for AF_UNIX */
237 #define	AF_INET		2		/* internetwork: UDP, TCP, etc. */
238 #define	AF_IMPLINK	3		/* arpanet imp addresses */
239 #define	AF_PUP		4		/* pup protocols: e.g. BSP */
240 #define	AF_CHAOS	5		/* mit CHAOS protocols */
241 #define	AF_NS		6		/* XEROX NS protocols */
242 #define	AF_NBS		7		/* nbs protocols */
243 #define	AF_ECMA		8		/* european computer manufacturers */
244 #define	AF_DATAKIT	9		/* datakit protocols */
245 #define	AF_CCITT	10		/* CCITT protocols, X.25 etc */
246 #define	AF_SNA		11		/* IBM SNA */
247 #define	AF_DECnet	12		/* DECnet */
248 #define	AF_DLI		13		/* Direct data link interface */
249 #define	AF_LAT		14		/* LAT */
250 #define	AF_HYLINK	15		/* NSC Hyperchannel */
251 #define	AF_APPLETALK	16		/* Apple Talk */
252 #define	AF_NIT		17		/* Network Interface Tap */
253 #define	AF_802		18		/* IEEE 802.2, also ISO 8802 */
254 #define	AF_OSI		19		/* umbrella for all families used */
255 #define	AF_X25		20		/* CCITT X.25 in particular */
256 #define	AF_OSINET	21		/* AFI = 47, IDI = 4 */
257 #define	AF_GOSIP	22		/* U.S. Government OSI */
258 #define	AF_IPX		23		/* Novell Internet Protocol */
259 #define	AF_ROUTE	24		/* Internal Routing Protocol */
260 #define	AF_LINK		25		/* Link-layer interface */
261 #define	AF_INET6	26		/* Internet Protocol, Version 6 */
262 #define	AF_KEY		27		/* Security Association DB socket */
263 #define	AF_NCA		28		/* NCA socket */
264 #define	AF_POLICY	29		/* Security Policy DB socket */
265 #define	AF_INET_OFFLOAD	30		/* Sun private; do not use */
266 #define	AF_TRILL	31		/* TRILL interface */
267 #define	AF_PACKET	32		/* PF_PACKET Linux socket interface */
268 
269 #define	AF_MAX		32
270 
271 /*
272  * Protocol families, same as address families for now.
273  */
274 #define	PF_UNSPEC	AF_UNSPEC
275 #define	PF_UNIX		AF_UNIX
276 #define	PF_LOCAL	PF_UNIX
277 #define	PF_FILE		PF_UNIX
278 #define	PF_INET		AF_INET
279 #define	PF_IMPLINK	AF_IMPLINK
280 #define	PF_PUP		AF_PUP
281 #define	PF_CHAOS	AF_CHAOS
282 #define	PF_NS		AF_NS
283 #define	PF_NBS		AF_NBS
284 #define	PF_ECMA		AF_ECMA
285 #define	PF_DATAKIT	AF_DATAKIT
286 #define	PF_CCITT	AF_CCITT
287 #define	PF_SNA		AF_SNA
288 #define	PF_DECnet	AF_DECnet
289 #define	PF_DLI		AF_DLI
290 #define	PF_LAT		AF_LAT
291 #define	PF_HYLINK	AF_HYLINK
292 #define	PF_APPLETALK	AF_APPLETALK
293 #define	PF_NIT		AF_NIT
294 #define	PF_802		AF_802
295 #define	PF_OSI		AF_OSI
296 #define	PF_X25		AF_X25
297 #define	PF_OSINET	AF_OSINET
298 #define	PF_GOSIP	AF_GOSIP
299 #define	PF_IPX		AF_IPX
300 #define	PF_ROUTE	AF_ROUTE
301 #define	PF_LINK		AF_LINK
302 #define	PF_INET6	AF_INET6
303 #define	PF_KEY		AF_KEY
304 #define	PF_NCA		AF_NCA
305 #define	PF_POLICY	AF_POLICY
306 #define	PF_INET_OFFLOAD	AF_INET_OFFLOAD	/* Sun private; do not use */
307 #define	PF_TRILL	AF_TRILL
308 #define	PF_PACKET	AF_PACKET
309 
310 #define	PF_MAX		AF_MAX
311 
312 /*
313  * Maximum queue length specifiable by listen.
314  */
315 #define	SOMAXCONN	128
316 
317 /*
318  * Message header for recvmsg and sendmsg calls.
319  */
320 struct msghdr {
321 	void		*msg_name;		/* optional address */
322 	socklen_t	msg_namelen;		/* size of address */
323 	struct iovec	*msg_iov;		/* scatter/gather array */
324 	int		msg_iovlen;		/* # elements in msg_iov */
325 
326 #if defined(_XPG4_2) || defined(_KERNEL)
327 	void		*msg_control;		/* ancillary data */
328 	socklen_t	msg_controllen;		/* ancillary data buffer len */
329 	int		msg_flags;		/* flags on received message */
330 #else
331 	caddr_t		msg_accrights;	/* access rights sent/received */
332 	int		msg_accrightslen;
333 #endif	/* defined(_XPG4_2) || defined(_KERNEL) */
334 };
335 
336 #if	defined(_KERNEL)
337 
338 /*
339  *	N.B.:  we assume that omsghdr and nmsghdr are isomorphic, with
340  *	the sole exception that nmsghdr has the additional msg_flags
341  *	field at the end.
342  */
343 struct omsghdr {
344 	void		*msg_name;	/* optional address */
345 	socklen_t	msg_namelen;	/* size of address */
346 	struct	iovec	*msg_iov;	/* scatter/gather array */
347 	int		msg_iovlen;	/* # elements in msg_iov */
348 	caddr_t		msg_accrights;	/* access rights sent/received */
349 	int		msg_accrightslen;
350 };
351 
352 #define	nmsghdr		msghdr
353 
354 #if defined(_SYSCALL32)
355 
356 struct omsghdr32 {
357 	caddr32_t	msg_name;	/* optional address */
358 	uint32_t	msg_namelen;	/* size of address */
359 	caddr32_t	msg_iov;	/* scatter/gather array */
360 	int32_t		msg_iovlen;	/* # elements in msg_iov */
361 	caddr32_t	msg_accrights;	/* access rights sent/received */
362 	uint32_t	msg_accrightslen;
363 };
364 
365 struct msghdr32 {
366 	caddr32_t	msg_name;	/* optional address */
367 	uint32_t	msg_namelen;	/* size of address */
368 	caddr32_t	msg_iov;	/* scatter/gather array */
369 	int32_t		msg_iovlen;	/* # elements in msg_iov */
370 	caddr32_t	msg_control;	/* ancillary data */
371 	uint32_t	msg_controllen;	/* ancillary data buffer len */
372 	int32_t		msg_flags;	/* flags on received message */
373 };
374 
375 #define	nmsghdr32	msghdr32
376 
377 #endif	/* _SYSCALL32 */
378 #endif	/* _KERNEL */
379 
380 #define	MSG_OOB		0x1		/* process out-of-band data */
381 #define	MSG_PEEK	0x2		/* peek at incoming message */
382 #define	MSG_DONTROUTE	0x4		/* send without using routing tables */
383 /* Added for XPGv2 compliance */
384 #define	MSG_EOR		0x8		/* Terminates a record */
385 #define	MSG_CTRUNC	0x10		/* Control data truncated */
386 #define	MSG_TRUNC	0x20		/* Normal data truncated */
387 #define	MSG_WAITALL	0x40		/* Wait for complete recv or error */
388 #define	MSG_DUPCTRL	0x800		/* Save control message for use with */
389 					/* with left over data */
390 /* End of XPGv2 compliance */
391 #define	MSG_DONTWAIT	0x80		/* Don't block for this recv */
392 #define	MSG_NOTIFICATION 0x100		/* Notification, not data */
393 #define	MSG_XPG4_2	0x8000		/* Private: XPG4.2 flag */
394 
395 #define	MSG_MAXIOVLEN	16
396 
397 #ifdef _KERNEL
398 
399 /*
400  * for kernel socket only
401  */
402 #define	MSG_MBLK_QUICKRELE	0x10000000	/* free mblk chain */
403 						/* in timely manner */
404 #define	MSG_USERSPACE		0x20000000	/* buffer from user space */
405 
406 #endif /* _KERNEL */
407 
408 
409 /* Added for XPGv2 compliance */
410 #define	SHUT_RD		0
411 #define	SHUT_WR		1
412 #define	SHUT_RDWR	2
413 
414 struct cmsghdr {
415 	socklen_t	cmsg_len;	/* data byte count, including hdr */
416 	int		cmsg_level;	/* originating protocol */
417 	int		cmsg_type;	/* protocol-specific type */
418 };
419 
420 #if defined(_XPG4_2) || defined(_KERNEL)
421 #if defined(__sparc)
422 /* To maintain backward compatibility, alignment needs to be 8 on sparc. */
423 #define	_CMSG_HDR_ALIGNMENT	8
424 #else
425 /* for __i386 (and other future architectures) */
426 #define	_CMSG_HDR_ALIGNMENT	4
427 #endif	/* defined(__sparc) */
428 #endif	/* defined(_XPG4_2) || defined(_KERNEL) */
429 
430 #if defined(_XPG4_2)
431 /*
432  * The cmsg headers (and macros dealing with them) were made available as
433  * part of UNIX95 and hence need to be protected with a _XPG4_2 define.
434  */
435 #define	_CMSG_DATA_ALIGNMENT	(sizeof (int))
436 #define	_CMSG_HDR_ALIGN(x)	(((uintptr_t)(x) + _CMSG_HDR_ALIGNMENT - 1) & \
437 				    ~(_CMSG_HDR_ALIGNMENT - 1))
438 #define	_CMSG_DATA_ALIGN(x)	(((uintptr_t)(x) + _CMSG_DATA_ALIGNMENT - 1) & \
439 				    ~(_CMSG_DATA_ALIGNMENT - 1))
440 #define	CMSG_DATA(c)							\
441 	((unsigned char *)_CMSG_DATA_ALIGN((struct cmsghdr *)(c) + 1))
442 
443 #define	CMSG_FIRSTHDR(m)						\
444 	(((m)->msg_controllen < sizeof (struct cmsghdr)) ?		\
445 	    (struct cmsghdr *)0 : (struct cmsghdr *)((m)->msg_control))
446 
447 #define	CMSG_NXTHDR(m, c)						\
448 	(((c) == 0) ? CMSG_FIRSTHDR(m) :			\
449 	((((uintptr_t)_CMSG_HDR_ALIGN((char *)(c) +			\
450 	((struct cmsghdr *)(c))->cmsg_len) + sizeof (struct cmsghdr)) >	\
451 	(((uintptr_t)((struct msghdr *)(m))->msg_control) +		\
452 	((uintptr_t)((struct msghdr *)(m))->msg_controllen))) ?		\
453 	((struct cmsghdr *)0) :						\
454 	((struct cmsghdr *)_CMSG_HDR_ALIGN((char *)(c) +		\
455 	    ((struct cmsghdr *)(c))->cmsg_len))))
456 
457 /* Amount of space + padding needed for a message of length l */
458 #define	CMSG_SPACE(l)							\
459 	((unsigned int)_CMSG_HDR_ALIGN(sizeof (struct cmsghdr) + (l)))
460 
461 /* Value to be used in cmsg_len, does not include trailing padding */
462 #define	CMSG_LEN(l)							\
463 	((unsigned int)_CMSG_DATA_ALIGN(sizeof (struct cmsghdr)) + (l))
464 
465 #endif	/* _XPG4_2 */
466 
467 #ifdef	_XPG4_2
468 #ifdef	__PRAGMA_REDEFINE_EXTNAME
469 #pragma redefine_extname bind __xnet_bind
470 #pragma redefine_extname connect __xnet_connect
471 #pragma redefine_extname recvmsg __xnet_recvmsg
472 #pragma redefine_extname sendmsg __xnet_sendmsg
473 #pragma redefine_extname sendto __xnet_sendto
474 #pragma redefine_extname socket __xnet_socket
475 #pragma redefine_extname socketpair __xnet_socketpair
476 #pragma redefine_extname getsockopt __xnet_getsockopt
477 #else	/* __PRAGMA_REDEFINE_EXTNAME */
478 #define	bind	__xnet_bind
479 #define	connect	__xnet_connect
480 #define	recvmsg	__xnet_recvmsg
481 #define	sendmsg	__xnet_sendmsg
482 #define	sendto	__xnet_sendto
483 #define	socket	__xnet_socket
484 #define	socketpair	__xnet_socketpair
485 #define	getsockopt	__xnet_getsockopt
486 #endif	/* __PRAGMA_REDEFINE_EXTNAME */
487 
488 #endif	/* _XPG4_2 */
489 
490 #if defined(_XPG4_2) && !defined(_XPG5)
491 #ifdef	__PRAGMA_REDEFINE_EXTNAME
492 #pragma redefine_extname listen __xnet_listen
493 #else	/* __PRAGMA_REDEFINE_EXTNAME */
494 #define	listen	__xnet_listen
495 #endif	/* __PRAGMA_REDEFINE_EXTNAME */
496 #endif /* (_XPG4_2) && !defined(_XPG5) */
497 
498 #if !defined(_KERNEL) || defined(_BOOT)
499 #ifdef	__STDC__
500 extern int accept(int, struct sockaddr *_RESTRICT_KYWD, Psocklen_t);
501 extern int bind(int, const struct sockaddr *, socklen_t);
502 extern int connect(int, const struct sockaddr *, socklen_t);
503 extern int getpeername(int, struct sockaddr *_RESTRICT_KYWD, Psocklen_t);
504 extern int getsockname(int, struct sockaddr *_RESTRICT_KYWD, Psocklen_t);
505 extern int getsockopt(int, int, int, void *_RESTRICT_KYWD, Psocklen_t);
506 extern int listen(int, int);	/* XXX - fixme???  where do I go */
507 extern int socketpair(int, int, int, int *);
508 extern ssize_t recv(int, void *, size_t, int);
509 extern ssize_t recvfrom(int, void *_RESTRICT_KYWD, size_t, int,
510 	struct sockaddr *_RESTRICT_KYWD, Psocklen_t);
511 extern ssize_t recvmsg(int, struct msghdr *, int);
512 extern ssize_t send(int, const void *, size_t, int);
513 extern ssize_t sendmsg(int, const struct msghdr *, int);
514 extern ssize_t sendto(int, const void *, size_t, int, const struct sockaddr *,
515 	socklen_t);
516 extern int setsockopt(int, int, int, const void *, socklen_t);
517 extern int shutdown(int, int);
518 extern int socket(int, int, int);
519 
520 #if !defined(_XPG4_2) || defined(_XPG6) || defined(__EXTENSIONS__)
521 extern int sockatmark(int);
522 #endif /* !defined(_XPG4_2) || defined(_XPG6) || defined(__EXTENSIONS__) */
523 #else	/* __STDC__ */
524 extern int accept();
525 extern int bind();
526 extern int connect();
527 extern int getpeername();
528 extern int getsockname();
529 extern int getsockopt();
530 extern int listen();
531 extern int recv();
532 extern int recvfrom();
533 extern int send();
534 extern int sendto();
535 extern int setsockopt();
536 extern int sockatmark();
537 extern int socket();
538 extern int recvmsg();
539 extern int sendmsg();
540 extern int shutdown();
541 extern int socketpair();
542 #endif	/* __STDC__ */
543 #endif	/* !defined(_KERNEL) || defined(_BOOT) */
544 
545 #ifdef	__cplusplus
546 }
547 #endif
548 
549 #endif	/* _SYS_SOCKET_H */
550