usr/src/uts/common/sys/socket.h

   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 #ifdef _KERNEL
 122 #define SO_SND_COPYAVOID 0x0800         /* Internal: use zero-copy */
 123 #define SO_SND_BUFINFO  0x1000          /* Internal: get buffer info */
 124                                         /* when doing zero-copy */
 125
 126 struct so_snd_bufinfo {
 127         ushort_t        sbi_wroff;      /* Write offset */
 128         ssize_t         sbi_maxblk;     /* Max size of a single mblk */
 129         ssize_t         sbi_maxpsz;     /* Max total size of a mblk chain */
 130         ushort_t        sbi_tail;       /* Extra space available at the end */
 131 };
 132 #endif /* _KERNEL */
 133
 134 /*
 135  * N.B.: The following definition is present only for compatibility
 136  * with release 3.0.  It will disappear in later releases.
 137  */
 138 #define SO_DONTLINGER   (~SO_LINGER)    /* ~SO_LINGER */
 139
 140 /*
 141  * Additional options, not kept in so_options.
 142  */
 143 #define SO_SNDBUF       0x1001          /* send buffer size */
 144 #define SO_RCVBUF       0x1002          /* receive buffer size */
 145 #define SO_SNDLOWAT     0x1003          /* send low-water mark */
 146 #define SO_RCVLOWAT     0x1004          /* receive low-water mark */
 147 #define SO_SNDTIMEO     0x1005          /* send timeout */
 148 #define SO_RCVTIMEO     0x1006          /* receive timeout */
 149 #define SO_ERROR        0x1007          /* get error status and clear */
 150 #define SO_TYPE         0x1008          /* get socket type */
 151 #define SO_PROTOTYPE    0x1009          /* get/set protocol type */
 152 #define SO_ANON_MLP     0x100a          /* create MLP on anonymous bind */
 153 #define SO_MAC_EXEMPT   0x100b          /* allow dominated unlabeled peers */
 154 #define SO_DOMAIN       0x100c          /* get socket domain */
 155 #define SO_RCVPSH       0x100d          /* receive interval to push data */
 156
 157 /* "Socket"-level control message types: */
 158 #define SCM_RIGHTS      0x1010          /* access rights (array of int) */
 159 #define SO_SECATTR      0x1011          /* socket's security attributes */
 160 #define SCM_UCRED       0x1012          /* sender's ucred */
 161 #define SO_TIMESTAMP    0x1013          /* socket-level timestamp option */
 162 #define SCM_TIMESTAMP   SO_TIMESTAMP    /* socket control message timestamp */
 163 #define SO_ALLZONES     0x1014          /* bind in all zones */
 164 #define SO_EXCLBIND     0x1015          /* exclusive binding */
 165
 166 #ifdef  _KERNEL
 167 #define SO_SRCADDR      0x2001          /* Internal: AF_UNIX source address */
 168 #define SO_FILEP        0x2002          /* Internal: AF_UNIX file pointer */
 169 #define SO_UNIX_CLOSE   0x2003          /* Internal: AF_UNIX peer closed */
 170 #endif  /* _KERNEL */
 171
 172 #ifdef  _KERNEL
 173 /*
 174  * new socket open flags to identify socket and acceptor streams
 175  */
 176 #define SO_ACCEPTOR     0x20000         /* acceptor socket */
 177 #define SO_SOCKSTR      0x40000         /* normal socket stream */
 178 #define SO_FALLBACK     0x80000         /* fallback to TPI socket */
 179
 180 /*
 181  * Flags for socket_create() and socket_newconn()
 182  */
 183 #define SOCKET_SLEEP    KM_SLEEP
 184 #define SOCKET_NOSLEEP  KM_NOSLEEP
 185
 186
 187 /*
 188  * flags used by sockfs when falling back to tpi socket
 189  */
 190 #define SO_FB_START     0x1
 191 #define SO_FB_FINISH    0x2
 192
 193 #endif  /* _KERNEL */
 194
 195 /*
 196  * Structure used for manipulating linger option.
 197  */
 198 struct  linger {
 199         int     l_onoff;                /* option on/off */
 200         int     l_linger;               /* linger time */
 201 };
 202
 203 /*
 204  * Levels for (get/set)sockopt() that don't apply to a specific protocol.
 205  */
 206 #define SOL_SOCKET      0xffff          /* options for socket level */
 207 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
 208 #define SOL_ROUTE       0xfffe          /* options for routing socket level */
 209 #endif
 210
 211 /*
 212  * Address families.
 213  *
 214  * Some of these constant names are copied for the DTrace IP provider in
 215  * usr/src/lib/libdtrace/common/{ip.d.in, ip.sed.in}, which should be kept
 216  * in sync.
 217  */
 218 #define AF_UNSPEC       0               /* unspecified */
 219 #define AF_UNIX         1               /* local to host (pipes, portals) */
 220 #define AF_LOCAL        AF_UNIX         /* Synonym for AF_UNIX */
 221 #define AF_FILE         AF_UNIX         /* Synonym for AF_UNIX */
 222 #define AF_INET         2               /* internetwork: UDP, TCP, etc. */
 223 #define AF_IMPLINK      3               /* arpanet imp addresses */
 224 #define AF_PUP          4               /* pup protocols: e.g. BSP */
 225 #define AF_CHAOS        5               /* mit CHAOS protocols */
 226 #define AF_NS           6               /* XEROX NS protocols */
 227 #define AF_NBS          7               /* nbs protocols */
 228 #define AF_ECMA         8               /* european computer manufacturers */
 229 #define AF_DATAKIT      9               /* datakit protocols */
 230 #define AF_CCITT        10              /* CCITT protocols, X.25 etc */
 231 #define AF_SNA          11              /* IBM SNA */
 232 #define AF_DECnet       12              /* DECnet */
 233 #define AF_DLI          13              /* Direct data link interface */
 234 #define AF_LAT          14              /* LAT */
 235 #define AF_HYLINK       15              /* NSC Hyperchannel */
 236 #define AF_APPLETALK    16              /* Apple Talk */
 237 #define AF_NIT          17              /* Network Interface Tap */
 238 #define AF_802          18              /* IEEE 802.2, also ISO 8802 */
 239 #define AF_OSI          19              /* umbrella for all families used */
 240 #define AF_X25          20              /* CCITT X.25 in particular */
 241 #define AF_OSINET       21              /* AFI = 47, IDI = 4 */
 242 #define AF_GOSIP        22              /* U.S. Government OSI */
 243 #define AF_IPX          23              /* Novell Internet Protocol */
 244 #define AF_ROUTE        24              /* Internal Routing Protocol */
 245 #define AF_LINK         25              /* Link-layer interface */
 246 #define AF_INET6        26              /* Internet Protocol, Version 6 */
 247 #define AF_KEY          27              /* Security Association DB socket */
 248 #define AF_NCA          28              /* NCA socket */
 249 #define AF_POLICY       29              /* Security Policy DB socket */
 250 #define AF_INET_OFFLOAD 30              /* Sun private; do not use */
 251
 252 #define AF_MAX          30
 253
 254 /*
 255  * Protocol families, same as address families for now.
 256  */
 257 #define PF_UNSPEC       AF_UNSPEC
 258 #define PF_UNIX         AF_UNIX
 259 #define PF_LOCAL        PF_UNIX
 260 #define PF_FILE         PF_UNIX
 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_NS           AF_NS
 266 #define PF_NBS          AF_NBS
 267 #define PF_ECMA         AF_ECMA
 268 #define PF_DATAKIT      AF_DATAKIT
 269 #define PF_CCITT        AF_CCITT
 270 #define PF_SNA          AF_SNA
 271 #define PF_DECnet       AF_DECnet
 272 #define PF_DLI          AF_DLI
 273 #define PF_LAT          AF_LAT
 274 #define PF_HYLINK       AF_HYLINK
 275 #define PF_APPLETALK    AF_APPLETALK
 276 #define PF_NIT          AF_NIT
 277 #define PF_802          AF_802
 278 #define PF_OSI          AF_OSI
 279 #define PF_X25          AF_X25
 280 #define PF_OSINET       AF_OSINET
 281 #define PF_GOSIP        AF_GOSIP
 282 #define PF_IPX          AF_IPX
 283 #define PF_ROUTE        AF_ROUTE
 284 #define PF_LINK         AF_LINK
 285 #define PF_INET6        AF_INET6
 286 #define PF_KEY          AF_KEY
 287 #define PF_NCA          AF_NCA
 288 #define PF_POLICY       AF_POLICY
 289 #define PF_INET_OFFLOAD AF_INET_OFFLOAD /* Sun private; do not use */
 290
 291 #define PF_MAX          AF_MAX
 292
 293 /*
 294  * Maximum queue length specifiable by listen.
 295  */
 296 #define SOMAXCONN       128
 297
 298 /*
 299  * Message header for recvmsg and sendmsg calls.
 300  */
 301 struct msghdr {
 302         void            *msg_name;              /* optional address */
 303         socklen_t       msg_namelen;            /* size of address */
 304         struct iovec    *msg_iov;               /* scatter/gather array */
 305         int             msg_iovlen;             /* # elements in msg_iov */
 306
 307 #if defined(_XPG4_2) || defined(_KERNEL)
 308         void            *msg_control;           /* ancillary data */
 309         socklen_t       msg_controllen;         /* ancillary data buffer len */
 310         int             msg_flags;              /* flags on received message */
 311 #else
 312         caddr_t         msg_accrights;  /* access rights sent/received */
 313         int             msg_accrightslen;
 314 #endif  /* defined(_XPG4_2) || defined(_KERNEL) */
 315 };
 316
 317 #if     defined(_KERNEL)
 318
 319 /*
 320  *      N.B.:  we assume that omsghdr and nmsghdr are isomorphic, with
 321  *      the sole exception that nmsghdr has the additional msg_flags
 322  *      field at the end.
 323  */
 324 struct omsghdr {
 325         void            *msg_name;      /* optional address */
 326         socklen_t       msg_namelen;    /* size of address */
 327         struct  iovec   *msg_iov;       /* scatter/gather array */
 328         int             msg_iovlen;     /* # elements in msg_iov */
 329         caddr_t         msg_accrights;  /* access rights sent/received */
 330         int             msg_accrightslen;
 331 };
 332
 333 #define nmsghdr         msghdr
 334
 335 #if defined(_SYSCALL32)
 336
 337 struct omsghdr32 {
 338         caddr32_t       msg_name;       /* optional address */
 339         uint32_t        msg_namelen;    /* size of address */
 340         caddr32_t       msg_iov;        /* scatter/gather array */
 341         int32_t         msg_iovlen;     /* # elements in msg_iov */
 342         caddr32_t       msg_accrights;  /* access rights sent/received */
 343         uint32_t        msg_accrightslen;
 344 };
 345
 346 struct msghdr32 {
 347         caddr32_t       msg_name;       /* optional address */
 348         uint32_t        msg_namelen;    /* size of address */
 349         caddr32_t       msg_iov;        /* scatter/gather array */
 350         int32_t         msg_iovlen;     /* # elements in msg_iov */
 351         caddr32_t       msg_control;    /* ancillary data */
 352         uint32_t        msg_controllen; /* ancillary data buffer len */
 353         int32_t         msg_flags;      /* flags on received message */
 354 };
 355
 356 #define nmsghdr32       msghdr32
 357
 358 #endif  /* _SYSCALL32 */
 359 #endif  /* _KERNEL */
 360
 361 #define MSG_OOB         0x1             /* process out-of-band data */
 362 #define MSG_PEEK        0x2             /* peek at incoming message */
 363 #define MSG_DONTROUTE   0x4             /* send without using routing tables */
 364 /* Added for XPGv2 compliance */
 365 #define MSG_EOR         0x8             /* Terminates a record */
 366 #define MSG_CTRUNC      0x10            /* Control data truncated */
 367 #define MSG_TRUNC       0x20            /* Normal data truncated */
 368 #define MSG_WAITALL     0x40            /* Wait for complete recv or error */
 369 #define MSG_DUPCTRL     0x800           /* Save control message for use with */
 370                                         /* with left over data */
 371 /* End of XPGv2 compliance */
 372 #define MSG_DONTWAIT    0x80            /* Don't block for this recv */
 373 #define MSG_NOTIFICATION 0x100          /* Notification, not data */
 374 #define MSG_XPG4_2      0x8000          /* Private: XPG4.2 flag */
 375
 376 #define MSG_MAXIOVLEN   16
 377
 378 #ifdef _KERNEL
 379
 380 /*
 381  * for kernel socket only
 382  */
 383 #define MSG_MBLK_QUICKRELE      0x10000000      /* free mblk chain */
 384                                                 /* in timely manner */
 385 #define MSG_USERSPACE           0x20000000      /* buffer from user space */
 386
 387 #endif /* _KERNEL */
 388
 389
 390 /* Added for XPGv2 compliance */
 391 #define SHUT_RD         0
 392 #define SHUT_WR         1
 393 #define SHUT_RDWR       2
 394
 395 struct cmsghdr {
 396         socklen_t       cmsg_len;       /* data byte count, including hdr */
 397         int             cmsg_level;     /* originating protocol */
 398         int             cmsg_type;      /* protocol-specific type */
 399 };
 400
 401 #if defined(_XPG4_2) || defined(_KERNEL)
 402 #if defined(__sparc)
 403 /* To maintain backward compatibility, alignment needs to be 8 on sparc. */
 404 #define _CMSG_HDR_ALIGNMENT     8
 405 #else
 406 /* for __i386 (and other future architectures) */
 407 #define _CMSG_HDR_ALIGNMENT     4
 408 #endif  /* defined(__sparc) */
 409 #endif  /* defined(_XPG4_2) || defined(_KERNEL) */
 410
 411 #if defined(_XPG4_2)
 412 /*
 413  * The cmsg headers (and macros dealing with them) were made available as
 414  * part of UNIX95 and hence need to be protected with a _XPG4_2 define.
 415  */
 416 #define _CMSG_DATA_ALIGNMENT    (sizeof (int))
 417 #define _CMSG_HDR_ALIGN(x)      (((uintptr_t)(x) + _CMSG_HDR_ALIGNMENT - 1) & \
 418                                     ~(_CMSG_HDR_ALIGNMENT - 1))
 419 #define _CMSG_DATA_ALIGN(x)     (((uintptr_t)(x) + _CMSG_DATA_ALIGNMENT - 1) & \
 420                                     ~(_CMSG_DATA_ALIGNMENT - 1))
 421 #define CMSG_DATA(c)                                                    \
 422         ((unsigned char *)_CMSG_DATA_ALIGN((struct cmsghdr *)(c) + 1))
 423
 424 #define CMSG_FIRSTHDR(m)                                                \
 425         (((m)->msg_controllen < sizeof (struct cmsghdr)) ?              \
 426             (struct cmsghdr *)0 : (struct cmsghdr *)((m)->msg_control))
 427
 428 #define CMSG_NXTHDR(m, c)                                               \
 429         (((c) == 0) ? CMSG_FIRSTHDR(m) :                        \
 430         ((((uintptr_t)_CMSG_HDR_ALIGN((char *)(c) +                     \
 431         ((struct cmsghdr *)(c))->cmsg_len) + sizeof (struct cmsghdr)) > \
 432         (((uintptr_t)((struct msghdr *)(m))->msg_control) +             \
 433         ((uintptr_t)((struct msghdr *)(m))->msg_controllen))) ?         \
 434         ((struct cmsghdr *)0) :                                         \
 435         ((struct cmsghdr *)_CMSG_HDR_ALIGN((char *)(c) +                \
 436             ((struct cmsghdr *)(c))->cmsg_len))))
 437
 438 /* Amount of space + padding needed for a message of length l */
 439 #define CMSG_SPACE(l)                                                   \
 440         ((unsigned int)_CMSG_HDR_ALIGN(sizeof (struct cmsghdr) + (l)))
 441
 442 /* Value to be used in cmsg_len, does not include trailing padding */
 443 #define CMSG_LEN(l)                                                     \
 444         ((unsigned int)_CMSG_DATA_ALIGN(sizeof (struct cmsghdr)) + (l))
 445
 446 #endif  /* _XPG4_2 */
 447
 448 #ifdef  _XPG4_2
 449 #ifdef  __PRAGMA_REDEFINE_EXTNAME
 450 #pragma redefine_extname bind __xnet_bind
 451 #pragma redefine_extname connect __xnet_connect
 452 #pragma redefine_extname recvmsg __xnet_recvmsg
 453 #pragma redefine_extname sendmsg __xnet_sendmsg
 454 #pragma redefine_extname sendto __xnet_sendto
 455 #pragma redefine_extname socket __xnet_socket
 456 #pragma redefine_extname socketpair __xnet_socketpair
 457 #pragma redefine_extname getsockopt __xnet_getsockopt
 458 #else   /* __PRAGMA_REDEFINE_EXTNAME */
 459 #define bind    __xnet_bind
 460 #define connect __xnet_connect
 461 #define recvmsg __xnet_recvmsg
 462 #define sendmsg __xnet_sendmsg
 463 #define sendto  __xnet_sendto
 464 #define socket  __xnet_socket
 465 #define socketpair      __xnet_socketpair
 466 #define getsockopt      __xnet_getsockopt
 467 #endif  /* __PRAGMA_REDEFINE_EXTNAME */
 468
 469 #endif  /* _XPG4_2 */
 470
 471 #if defined(_XPG4_2) && !defined(_XPG5)
 472 #ifdef  __PRAGMA_REDEFINE_EXTNAME
 473 #pragma redefine_extname listen __xnet_listen
 474 #else   /* __PRAGMA_REDEFINE_EXTNAME */
 475 #define listen  __xnet_listen
 476 #endif  /* __PRAGMA_REDEFINE_EXTNAME */
 477 #endif /* (_XPG4_2) && !defined(_XPG5) */
 478
 479 #if !defined(_KERNEL) || defined(_BOOT)
 480 #ifdef  __STDC__
 481 extern int accept(int, struct sockaddr *_RESTRICT_KYWD, Psocklen_t);
 482 extern int bind(int, const struct sockaddr *, socklen_t);
 483 extern int connect(int, const struct sockaddr *, socklen_t);
 484 extern int getpeername(int, struct sockaddr *_RESTRICT_KYWD, Psocklen_t);
 485 extern int getsockname(int, struct sockaddr *_RESTRICT_KYWD, Psocklen_t);
 486 extern int getsockopt(int, int, int, void *_RESTRICT_KYWD, Psocklen_t);
 487 extern int listen(int, int);    /* XXX - fixme???  where do I go */
 488 extern int socketpair(int, int, int, int *);
 489 extern ssize_t recv(int, void *, size_t, int);
 490 extern ssize_t recvfrom(int, void *_RESTRICT_KYWD, size_t, int,
 491         struct sockaddr *_RESTRICT_KYWD, Psocklen_t);
 492 extern ssize_t recvmsg(int, struct msghdr *, int);
 493 extern ssize_t send(int, const void *, size_t, int);
 494 extern ssize_t sendmsg(int, const struct msghdr *, int);
 495 extern ssize_t sendto(int, const void *, size_t, int, const struct sockaddr *,
 496         socklen_t);
 497 extern int setsockopt(int, int, int, const void *, socklen_t);
 498 extern int shutdown(int, int);
 499 extern int socket(int, int, int);
 500
 501 #if !defined(_XPG4_2) || defined(_XPG6) || defined(__EXTENSIONS__)
 502 extern int sockatmark(int);
 503 #endif /* !defined(_XPG4_2) || defined(_XPG6) || defined(__EXTENSIONS__) */
 504 #else   /* __STDC__ */
 505 extern int accept();
 506 extern int bind();
 507 extern int connect();
 508 extern int getpeername();
 509 extern int getsockname();
 510 extern int getsockopt();
 511 extern int listen();
 512 extern int recv();
 513 extern int recvfrom();
 514 extern int send();
 515 extern int sendto();
 516 extern int setsockopt();
 517 extern int sockatmark();
 518 extern int socket();
 519 extern int recvmsg();
 520 extern int sendmsg();
 521 extern int shutdown();
 522 extern int socketpair();
 523 #endif  /* __STDC__ */
 524 #endif  /* !defined(_KERNEL) || defined(_BOOT) */
 525
 526 #ifdef  __cplusplus
 527 }
 528 #endif
 529
 530 #endif  /* _SYS_SOCKET_H */