FreeBSD/Linux Kernel Cross Reference
sys/sys/socket.h
1 /*-
2 * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
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 * @(#)socket.h 8.4 (Berkeley) 2/21/94
30 * $FreeBSD: src/sys/sys/socket.h,v 1.83.2.2 2005/09/27 21:54:03 rwatson Exp $
31 */
32
33 #ifndef _SYS_SOCKET_H_
34 #define _SYS_SOCKET_H_
35
36 #include <sys/cdefs.h>
37 #include <sys/_types.h>
38 #include <sys/_iovec.h>
39 #define _NO_NAMESPACE_POLLUTION
40 #include <machine/param.h>
41 #undef _NO_NAMESPACE_POLLUTION
42
43 /*
44 * Definitions related to sockets: types, address families, options.
45 */
46
47 /*
48 * Data types.
49 */
50 #if __BSD_VISIBLE
51 #ifndef _GID_T_DECLARED
52 typedef __gid_t gid_t;
53 #define _GID_T_DECLARED
54 #endif
55
56 #ifndef _OFF_T_DECLARED
57 typedef __off_t off_t;
58 #define _OFF_T_DECLARED
59 #endif
60
61 #ifndef _PID_T_DECLARED
62 typedef __pid_t pid_t;
63 #define _PID_T_DECLARED
64 #endif
65 #endif
66
67 #ifndef _SA_FAMILY_T_DECLARED
68 typedef __sa_family_t sa_family_t;
69 #define _SA_FAMILY_T_DECLARED
70 #endif
71
72 #ifndef _SOCKLEN_T_DECLARED
73 typedef __socklen_t socklen_t;
74 #define _SOCKLEN_T_DECLARED
75 #endif
76
77 #ifndef _SSIZE_T_DECLARED
78 typedef __ssize_t ssize_t;
79 #define _SSIZE_T_DECLARED
80 #endif
81
82 #if __BSD_VISIBLE
83 #ifndef _UID_T_DECLARED
84 typedef __uid_t uid_t;
85 #define _UID_T_DECLARED
86 #endif
87 #endif
88
89 /*
90 * Types
91 */
92 #define SOCK_STREAM 1 /* stream socket */
93 #define SOCK_DGRAM 2 /* datagram socket */
94 #define SOCK_RAW 3 /* raw-protocol interface */
95 #if __BSD_VISIBLE
96 #define SOCK_RDM 4 /* reliably-delivered message */
97 #endif
98 #define SOCK_SEQPACKET 5 /* sequenced packet stream */
99
100 /*
101 * Option flags per-socket.
102 */
103 #define SO_DEBUG 0x0001 /* turn on debugging info recording */
104 #define SO_ACCEPTCONN 0x0002 /* socket has had listen() */
105 #define SO_REUSEADDR 0x0004 /* allow local address reuse */
106 #define SO_KEEPALIVE 0x0008 /* keep connections alive */
107 #define SO_DONTROUTE 0x0010 /* just use interface addresses */
108 #define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */
109 #if __BSD_VISIBLE
110 #define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */
111 #endif
112 #define SO_LINGER 0x0080 /* linger on close if data present */
113 #define SO_OOBINLINE 0x0100 /* leave received OOB data in line */
114 #if __BSD_VISIBLE
115 #define SO_REUSEPORT 0x0200 /* allow local address & port reuse */
116 #define SO_TIMESTAMP 0x0400 /* timestamp received dgram traffic */
117 #define SO_NOSIGPIPE 0x0800 /* no SIGPIPE from EPIPE */
118 #define SO_ACCEPTFILTER 0x1000 /* there is an accept filter */
119 #define SO_BINTIME 0x2000 /* timestamp received dgram traffic */
120 #endif
121
122 /*
123 * Additional options, not kept in so_options.
124 */
125 #define SO_SNDBUF 0x1001 /* send buffer size */
126 #define SO_RCVBUF 0x1002 /* receive buffer size */
127 #define SO_SNDLOWAT 0x1003 /* send low-water mark */
128 #define SO_RCVLOWAT 0x1004 /* receive low-water mark */
129 #define SO_SNDTIMEO 0x1005 /* send timeout */
130 #define SO_RCVTIMEO 0x1006 /* receive timeout */
131 #define SO_ERROR 0x1007 /* get error status and clear */
132 #define SO_TYPE 0x1008 /* get socket type */
133 #if __BSD_VISIBLE
134 #define SO_LABEL 0x1009 /* socket's MAC label */
135 #define SO_PEERLABEL 0x1010 /* socket's peer's MAC label */
136 #define SO_LISTENQLIMIT 0x1011 /* socket's backlog limit */
137 #define SO_LISTENQLEN 0x1012 /* socket's complete queue length */
138 #define SO_LISTENINCQLEN 0x1013 /* socket's incomplete queue length */
139 #endif
140
141 /*
142 * Structure used for manipulating linger option.
143 */
144 struct linger {
145 int l_onoff; /* option on/off */
146 int l_linger; /* linger time */
147 };
148
149 #if __BSD_VISIBLE
150 struct accept_filter_arg {
151 char af_name[16];
152 char af_arg[256-16];
153 };
154 #endif
155
156 /*
157 * Level number for (get/set)sockopt() to apply to socket itself.
158 */
159 #define SOL_SOCKET 0xffff /* options for socket level */
160
161 /*
162 * Address families.
163 */
164 #define AF_UNSPEC 0 /* unspecified */
165 #if __BSD_VISIBLE
166 #define AF_LOCAL AF_UNIX /* local to host (pipes, portals) */
167 #endif
168 #define AF_UNIX 1 /* standardized name for AF_LOCAL */
169 #define AF_INET 2 /* internetwork: UDP, TCP, etc. */
170 #if __BSD_VISIBLE
171 #define AF_IMPLINK 3 /* arpanet imp addresses */
172 #define AF_PUP 4 /* pup protocols: e.g. BSP */
173 #define AF_CHAOS 5 /* mit CHAOS protocols */
174 #define AF_NETBIOS 6 /* SMB protocols */
175 #define AF_ISO 7 /* ISO protocols */
176 #define AF_OSI AF_ISO
177 #define AF_ECMA 8 /* European computer manufacturers */
178 #define AF_DATAKIT 9 /* datakit protocols */
179 #define AF_CCITT 10 /* CCITT protocols, X.25 etc */
180 #define AF_SNA 11 /* IBM SNA */
181 #define AF_DECnet 12 /* DECnet */
182 #define AF_DLI 13 /* DEC Direct data link interface */
183 #define AF_LAT 14 /* LAT */
184 #define AF_HYLINK 15 /* NSC Hyperchannel */
185 #define AF_APPLETALK 16 /* Apple Talk */
186 #define AF_ROUTE 17 /* Internal Routing Protocol */
187 #define AF_LINK 18 /* Link layer interface */
188 #define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */
189 #define AF_COIP 20 /* connection-oriented IP, aka ST II */
190 #define AF_CNT 21 /* Computer Network Technology */
191 #define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */
192 #define AF_IPX 23 /* Novell Internet Protocol */
193 #define AF_SIP 24 /* Simple Internet Protocol */
194 #define pseudo_AF_PIP 25 /* Help Identify PIP packets */
195 #define AF_ISDN 26 /* Integrated Services Digital Network*/
196 #define AF_E164 AF_ISDN /* CCITT E.164 recommendation */
197 #define pseudo_AF_KEY 27 /* Internal key-management function */
198 #endif
199 #define AF_INET6 28 /* IPv6 */
200 #if __BSD_VISIBLE
201 #define AF_NATM 29 /* native ATM access */
202 #define AF_ATM 30 /* ATM */
203 #define pseudo_AF_HDRCMPLT 31 /* Used by BPF to not rewrite headers
204 * in interface output routine
205 */
206 #define AF_NETGRAPH 32 /* Netgraph sockets */
207 #define AF_SLOW 33 /* 802.3ad slow protocol */
208 #define AF_SCLUSTER 34 /* Sitara cluster protocol */
209 #define AF_ARP 35
210 #define AF_BLUETOOTH 36 /* Bluetooth sockets */
211 #define AF_MAX 37
212 #endif
213
214 /*
215 * Structure used by kernel to store most
216 * addresses.
217 */
218 struct sockaddr {
219 unsigned char sa_len; /* total length */
220 sa_family_t sa_family; /* address family */
221 char sa_data[14]; /* actually longer; address value */
222 };
223 #if __BSD_VISIBLE
224 #define SOCK_MAXADDRLEN 255 /* longest possible addresses */
225
226 /*
227 * Structure used by kernel to pass protocol
228 * information in raw sockets.
229 */
230 struct sockproto {
231 unsigned short sp_family; /* address family */
232 unsigned short sp_protocol; /* protocol */
233 };
234 #endif
235
236 /*
237 * RFC 2553: protocol-independent placeholder for socket addresses
238 */
239 #define _SS_MAXSIZE 128U
240 #define _SS_ALIGNSIZE (sizeof(__int64_t))
241 #define _SS_PAD1SIZE (_SS_ALIGNSIZE - sizeof(unsigned char) - \
242 sizeof(sa_family_t))
243 #define _SS_PAD2SIZE (_SS_MAXSIZE - sizeof(unsigned char) - \
244 sizeof(sa_family_t) - _SS_PAD1SIZE - _SS_ALIGNSIZE)
245
246 struct sockaddr_storage {
247 unsigned char ss_len; /* address length */
248 sa_family_t ss_family; /* address family */
249 char __ss_pad1[_SS_PAD1SIZE];
250 __int64_t __ss_align; /* force desired struct alignment */
251 char __ss_pad2[_SS_PAD2SIZE];
252 };
253
254 #if __BSD_VISIBLE
255 /*
256 * Protocol families, same as address families for now.
257 */
258 #define PF_UNSPEC AF_UNSPEC
259 #define PF_LOCAL AF_LOCAL
260 #define PF_UNIX PF_LOCAL /* backward compatibility */
261 #define PF_INET AF_INET
262 #define PF_IMPLINK AF_IMPLINK
263 #define PF_PUP AF_PUP
264 #define PF_CHAOS AF_CHAOS
265 #define PF_NETBIOS AF_NETBIOS
266 #define PF_ISO AF_ISO
267 #define PF_OSI AF_ISO
268 #define PF_ECMA AF_ECMA
269 #define PF_DATAKIT AF_DATAKIT
270 #define PF_CCITT AF_CCITT
271 #define PF_SNA AF_SNA
272 #define PF_DECnet AF_DECnet
273 #define PF_DLI AF_DLI
274 #define PF_LAT AF_LAT
275 #define PF_HYLINK AF_HYLINK
276 #define PF_APPLETALK AF_APPLETALK
277 #define PF_ROUTE AF_ROUTE
278 #define PF_LINK AF_LINK
279 #define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */
280 #define PF_COIP AF_COIP
281 #define PF_CNT AF_CNT
282 #define PF_SIP AF_SIP
283 #define PF_IPX AF_IPX
284 #define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */
285 #define PF_PIP pseudo_AF_PIP
286 #define PF_ISDN AF_ISDN
287 #define PF_KEY pseudo_AF_KEY
288 #define PF_INET6 AF_INET6
289 #define PF_NATM AF_NATM
290 #define PF_ATM AF_ATM
291 #define PF_NETGRAPH AF_NETGRAPH
292 #define PF_SLOW AF_SLOW
293 #define PF_SCLUSTER AF_SCLUSTER
294 #define PF_ARP AF_ARP
295 #define PF_BLUETOOTH AF_BLUETOOTH
296
297 #define PF_MAX AF_MAX
298
299 /*
300 * Definitions for network related sysctl, CTL_NET.
301 *
302 * Second level is protocol family.
303 * Third level is protocol number.
304 *
305 * Further levels are defined by the individual families below.
306 */
307 #define NET_MAXID AF_MAX
308
309 #define CTL_NET_NAMES { \
310 { 0, 0 }, \
311 { "unix", CTLTYPE_NODE }, \
312 { "inet", CTLTYPE_NODE }, \
313 { "implink", CTLTYPE_NODE }, \
314 { "pup", CTLTYPE_NODE }, \
315 { "chaos", CTLTYPE_NODE }, \
316 { "xerox_ns", CTLTYPE_NODE }, \
317 { "iso", CTLTYPE_NODE }, \
318 { "emca", CTLTYPE_NODE }, \
319 { "datakit", CTLTYPE_NODE }, \
320 { "ccitt", CTLTYPE_NODE }, \
321 { "ibm_sna", CTLTYPE_NODE }, \
322 { "decnet", CTLTYPE_NODE }, \
323 { "dec_dli", CTLTYPE_NODE }, \
324 { "lat", CTLTYPE_NODE }, \
325 { "hylink", CTLTYPE_NODE }, \
326 { "appletalk", CTLTYPE_NODE }, \
327 { "route", CTLTYPE_NODE }, \
328 { "link_layer", CTLTYPE_NODE }, \
329 { "xtp", CTLTYPE_NODE }, \
330 { "coip", CTLTYPE_NODE }, \
331 { "cnt", CTLTYPE_NODE }, \
332 { "rtip", CTLTYPE_NODE }, \
333 { "ipx", CTLTYPE_NODE }, \
334 { "sip", CTLTYPE_NODE }, \
335 { "pip", CTLTYPE_NODE }, \
336 { "isdn", CTLTYPE_NODE }, \
337 { "key", CTLTYPE_NODE }, \
338 { "inet6", CTLTYPE_NODE }, \
339 { "natm", CTLTYPE_NODE }, \
340 { "atm", CTLTYPE_NODE }, \
341 { "hdrcomplete", CTLTYPE_NODE }, \
342 { "netgraph", CTLTYPE_NODE }, \
343 { "snp", CTLTYPE_NODE }, \
344 { "scp", CTLTYPE_NODE }, \
345 }
346
347 /*
348 * PF_ROUTE - Routing table
349 *
350 * Three additional levels are defined:
351 * Fourth: address family, 0 is wildcard
352 * Fifth: type of info, defined below
353 * Sixth: flag(s) to mask with for NET_RT_FLAGS
354 */
355 #define NET_RT_DUMP 1 /* dump; may limit to a.f. */
356 #define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
357 #define NET_RT_IFLIST 3 /* survey interface list */
358 #define NET_RT_IFMALIST 4 /* return multicast address list */
359 #define NET_RT_MAXID 5
360
361 #define CTL_NET_RT_NAMES { \
362 { 0, 0 }, \
363 { "dump", CTLTYPE_STRUCT }, \
364 { "flags", CTLTYPE_STRUCT }, \
365 { "iflist", CTLTYPE_STRUCT }, \
366 { "ifmalist", CTLTYPE_STRUCT }, \
367 }
368 #endif /* __BSD_VISIBLE */
369
370 /*
371 * Maximum queue length specifiable by listen.
372 */
373 #define SOMAXCONN 128
374
375 /*
376 * Message header for recvmsg and sendmsg calls.
377 * Used value-result for recvmsg, value only for sendmsg.
378 */
379 struct msghdr {
380 void *msg_name; /* optional address */
381 socklen_t msg_namelen; /* size of address */
382 struct iovec *msg_iov; /* scatter/gather array */
383 int msg_iovlen; /* # elements in msg_iov */
384 void *msg_control; /* ancillary data, see below */
385 socklen_t msg_controllen; /* ancillary data buffer len */
386 int msg_flags; /* flags on received message */
387 };
388
389 #define MSG_OOB 0x1 /* process out-of-band data */
390 #define MSG_PEEK 0x2 /* peek at incoming message */
391 #define MSG_DONTROUTE 0x4 /* send without using routing tables */
392 #define MSG_EOR 0x8 /* data completes record */
393 #define MSG_TRUNC 0x10 /* data discarded before delivery */
394 #define MSG_CTRUNC 0x20 /* control data lost before delivery */
395 #define MSG_WAITALL 0x40 /* wait for full request or error */
396 #if __BSD_VISIBLE
397 #define MSG_DONTWAIT 0x80 /* this message should be nonblocking */
398 #define MSG_EOF 0x100 /* data completes connection */
399 #define MSG_NBIO 0x4000 /* FIONBIO mode, used by fifofs */
400 #define MSG_COMPAT 0x8000 /* used in sendit() */
401 #endif
402
403 /*
404 * Header for ancillary data objects in msg_control buffer.
405 * Used for additional information with/about a datagram
406 * not expressible by flags. The format is a sequence
407 * of message elements headed by cmsghdr structures.
408 */
409 struct cmsghdr {
410 socklen_t cmsg_len; /* data byte count, including hdr */
411 int cmsg_level; /* originating protocol */
412 int cmsg_type; /* protocol-specific type */
413 /* followed by u_char cmsg_data[]; */
414 };
415
416 #if __BSD_VISIBLE
417 /*
418 * While we may have more groups than this, the cmsgcred struct must
419 * be able to fit in an mbuf, and NGROUPS_MAX is too large to allow
420 * this.
421 */
422 #define CMGROUP_MAX 16
423
424 /*
425 * Credentials structure, used to verify the identity of a peer
426 * process that has sent us a message. This is allocated by the
427 * peer process but filled in by the kernel. This prevents the
428 * peer from lying about its identity. (Note that cmcred_groups[0]
429 * is the effective GID.)
430 */
431 struct cmsgcred {
432 pid_t cmcred_pid; /* PID of sending process */
433 uid_t cmcred_uid; /* real UID of sending process */
434 uid_t cmcred_euid; /* effective UID of sending process */
435 gid_t cmcred_gid; /* real GID of sending process */
436 short cmcred_ngroups; /* number or groups */
437 gid_t cmcred_groups[CMGROUP_MAX]; /* groups */
438 };
439 #endif /* __BSD_VISIBLE */
440
441 /* given pointer to struct cmsghdr, return pointer to data */
442 #define CMSG_DATA(cmsg) ((unsigned char *)(cmsg) + \
443 _ALIGN(sizeof(struct cmsghdr)))
444
445 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
446 #define CMSG_NXTHDR(mhdr, cmsg) \
447 (((char *)(cmsg) + _ALIGN((cmsg)->cmsg_len) + \
448 _ALIGN(sizeof(struct cmsghdr)) > \
449 (char *)(mhdr)->msg_control + (mhdr)->msg_controllen) ? \
450 (struct cmsghdr *)0 : \
451 (struct cmsghdr *)((char *)(cmsg) + _ALIGN((cmsg)->cmsg_len)))
452
453 /*
454 * RFC 2292 requires to check msg_controllen, in case that the kernel returns
455 * an empty list for some reasons.
456 */
457 #define CMSG_FIRSTHDR(mhdr) \
458 ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
459 (struct cmsghdr *)(mhdr)->msg_control : \
460 (struct cmsghdr *)NULL)
461
462 #if __BSD_VISIBLE
463 /* RFC 2292 additions */
464 #define CMSG_SPACE(l) (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(l))
465 #define CMSG_LEN(l) (_ALIGN(sizeof(struct cmsghdr)) + (l))
466 #endif
467
468 #ifdef _KERNEL
469 #define CMSG_ALIGN(n) _ALIGN(n)
470 #endif
471
472 /* "Socket"-level control message types: */
473 #define SCM_RIGHTS 0x01 /* access rights (array of int) */
474 #if __BSD_VISIBLE
475 #define SCM_TIMESTAMP 0x02 /* timestamp (struct timeval) */
476 #define SCM_CREDS 0x03 /* process creds (struct cmsgcred) */
477 #define SCM_BINTIME 0x04 /* timestamp (struct bintime) */
478 #endif
479
480 #if __BSD_VISIBLE
481 /*
482 * 4.3 compat sockaddr, move to compat file later
483 */
484 struct osockaddr {
485 unsigned short sa_family; /* address family */
486 char sa_data[14]; /* up to 14 bytes of direct address */
487 };
488
489 /*
490 * 4.3-compat message header (move to compat file later).
491 */
492 struct omsghdr {
493 char *msg_name; /* optional address */
494 int msg_namelen; /* size of address */
495 struct iovec *msg_iov; /* scatter/gather array */
496 int msg_iovlen; /* # elements in msg_iov */
497 char *msg_accrights; /* access rights sent/received */
498 int msg_accrightslen;
499 };
500 #endif
501
502 /*
503 * howto arguments for shutdown(2), specified by Posix.1g.
504 */
505 #define SHUT_RD 0 /* shut down the reading side */
506 #define SHUT_WR 1 /* shut down the writing side */
507 #define SHUT_RDWR 2 /* shut down both sides */
508
509 #if __BSD_VISIBLE
510 /*
511 * sendfile(2) header/trailer struct
512 */
513 struct sf_hdtr {
514 struct iovec *headers; /* pointer to an array of header struct iovec's */
515 int hdr_cnt; /* number of header iovec's */
516 struct iovec *trailers; /* pointer to an array of trailer struct iovec's */
517 int trl_cnt; /* number of trailer iovec's */
518 };
519
520 /*
521 * Sendfile-specific flag(s)
522 */
523 #define SF_NODISKIO 0x00000001
524 #endif
525
526 #ifndef _KERNEL
527
528 #include <sys/cdefs.h>
529
530 __BEGIN_DECLS
531 int accept(int, struct sockaddr * __restrict, socklen_t * __restrict);
532 int bind(int, const struct sockaddr *, socklen_t);
533 int connect(int, const struct sockaddr *, socklen_t);
534 int getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict);
535 int getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict);
536 int getsockopt(int, int, int, void * __restrict, socklen_t * __restrict);
537 int listen(int, int);
538 ssize_t recv(int, void *, size_t, int);
539 ssize_t recvfrom(int, void *, size_t, int, struct sockaddr * __restrict, socklen_t * __restrict);
540 ssize_t recvmsg(int, struct msghdr *, int);
541 ssize_t send(int, const void *, size_t, int);
542 ssize_t sendto(int, const void *,
543 size_t, int, const struct sockaddr *, socklen_t);
544 ssize_t sendmsg(int, const struct msghdr *, int);
545 #if __BSD_VISIBLE
546 int sendfile(int, int, off_t, size_t, struct sf_hdtr *, off_t *, int);
547 #endif
548 int setsockopt(int, int, int, const void *, socklen_t);
549 int shutdown(int, int);
550 int sockatmark(int);
551 int socket(int, int, int);
552 int socketpair(int, int, int, int *);
553 __END_DECLS
554
555 #endif /* !_KERNEL */
556
557 #endif /* !_SYS_SOCKET_H_ */
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