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 (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 25/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 26/* All Rights Reserved */ 27 28/* 29 * University Copyright- Copyright (c) 1982, 1986, 1988 30 * The Regents of the University of California 31 * All Rights Reserved 32 * 33 * University Acknowledgment- Portions of this document are derived from 34 * software developed by the University of California, Berkeley, and its 35 * contributors. 36 */ 37 38#ifndef _SYS_SOCKET_H 39#define _SYS_SOCKET_H 40 41#include <sys/types.h> 42#include <sys/uio.h> 43#include <sys/feature_tests.h> 44#include <sys/socket_impl.h> 45#if !defined(_XPG4_2) || defined(__EXTENSIONS__) 46#ifndef _KERNEL 47#include <sys/netconfig.h> 48#endif /* !_KERNEL */ 49#include <netinet/in.h> 50#endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */ 51 52#ifdef __cplusplus 53extern "C" { 54#endif 55 56#ifndef _SOCKLEN_T 57#define _SOCKLEN_T 58 59/* 60 * The socklen definitions are reproduced in netinet/in.h for the inet6_ 61 * functions. Exposing all of sys/socket.h via netinet/in.h breaks existing 62 * applications and is not required by austin. 63 */ 64#if defined(_XPG4_2) && !defined(_XPG5) && !defined(_LP64) 65typedef size_t socklen_t; 66#else 67typedef uint32_t socklen_t; 68#endif /* defined(_XPG4_2) && !defined(_XPG5) && !defined(_LP64) */ 69 70#if defined(_XPG4_2) || defined(_BOOT) 71typedef socklen_t *_RESTRICT_KYWD Psocklen_t; 72#else 73typedef void *_RESTRICT_KYWD Psocklen_t; 74#endif /* defined(_XPG4_2) || defined(_BOOT) */ 75 76#endif /* _SOCKLEN_T */ 77 78/* 79 * Definitions related to sockets: types, address families, options. 80 */ 81#if !defined(_XPG4_2) || defined(__EXTENSIONS__) 82#ifndef NC_TPI_CLTS 83#define NC_TPI_CLTS 1 /* must agree with netconfig.h */ 84#define NC_TPI_COTS 2 /* must agree with netconfig.h */ 85#define NC_TPI_COTS_ORD 3 /* must agree with netconfig.h */ 86#define NC_TPI_RAW 4 /* must agree with netconfig.h */ 87#endif /* !NC_TPI_CLTS */ 88#endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */ 89 90/* 91 * Types 92 */ 93#if !defined(_XPG4_2) || defined(__EXTENSIONS__) 94#define SOCK_STREAM NC_TPI_COTS /* stream socket */ 95#define SOCK_DGRAM NC_TPI_CLTS /* datagram socket */ 96#define SOCK_RAW NC_TPI_RAW /* raw-protocol interface */ 97#else 98#define SOCK_STREAM 2 /* stream socket */ 99#define SOCK_DGRAM 1 /* datagram socket */ 100#define SOCK_RAW 4 /* raw-protocol interface */ 101#endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */ 102#define SOCK_RDM 5 /* reliably-delivered message */ 103#define SOCK_SEQPACKET 6 /* sequenced packet stream */ 104 105/* 106 * Option flags per-socket. 107 */ 108#define SO_DEBUG 0x0001 /* turn on debugging info recording */ 109#define SO_ACCEPTCONN 0x0002 /* socket has had listen() */ 110#define SO_REUSEADDR 0x0004 /* allow local address reuse */ 111#define SO_KEEPALIVE 0x0008 /* keep connections alive */ 112#define SO_DONTROUTE 0x0010 /* just use interface addresses */ 113#define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */ 114#define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */ 115#define SO_LINGER 0x0080 /* linger on close if data present */ 116#define SO_OOBINLINE 0x0100 /* leave received OOB data in line */ 117#define SO_DGRAM_ERRIND 0x0200 /* Application wants delayed error */ 118#define SO_RECVUCRED 0x0400 /* Application wants ucred of sender */ 119 120/* 121 * Socket options are passed using a signed integer, but it is also rare 122 * for more than one to ever be passed at the same time with setsockopt 123 * and only one at a time can be retrieved with getsockopt. 124 * 125 * Since the lower numbers cannot be renumbered for compatibility reasons, 126 * it would seem that we need to start a new number space (0x40000000 - 127 * 0x7fffffff) for those that don't need to be stored as a bit flag 128 * somewhere. This limits the flag options to 30 but that seems to be 129 * plenty, anyway. 0x40000000 is reserved for future use. 130 */ 131#define SO_ATTACH_FILTER 0x40000001 132#define SO_DETACH_FILTER 0x40000002 133 134#ifdef _KERNEL 135#define SO_SND_COPYAVOID 0x0800 /* Internal: use zero-copy */ 136#define SO_SND_BUFINFO 0x1000 /* Internal: get buffer info */ 137 /* when doing zero-copy */ 138 139struct so_snd_bufinfo { 140 ushort_t sbi_wroff; /* Write offset */ 141 ssize_t sbi_maxblk; /* Max size of a single mblk */ 142 ssize_t sbi_maxpsz; /* Max total size of a mblk chain */ 143 ushort_t sbi_tail; /* Extra space available at the end */ 144}; 145#endif /* _KERNEL */ 146 147/* 148 * N.B.: The following definition is present only for compatibility 149 * with release 3.0. It will disappear in later releases. 150 */ 151#define SO_DONTLINGER (~SO_LINGER) /* ~SO_LINGER */ 152 153/* 154 * Additional options, not kept in so_options. 155 */ 156#define SO_SNDBUF 0x1001 /* send buffer size */ 157#define SO_RCVBUF 0x1002 /* receive buffer size */ 158#define SO_SNDLOWAT 0x1003 /* send low-water mark */ 159#define SO_RCVLOWAT 0x1004 /* receive low-water mark */ 160#define SO_SNDTIMEO 0x1005 /* send timeout */ 161#define SO_RCVTIMEO 0x1006 /* receive timeout */ 162#define SO_ERROR 0x1007 /* get error status and clear */ 163#define SO_TYPE 0x1008 /* get socket type */ 164#define SO_PROTOTYPE 0x1009 /* get/set protocol type */ 165#define SO_ANON_MLP 0x100a /* create MLP on anonymous bind */ 166#define SO_MAC_EXEMPT 0x100b /* allow dominated unlabeled peers */ 167#define SO_DOMAIN 0x100c /* get socket domain */ 168#define SO_RCVPSH 0x100d /* receive interval to push data */ 169 170/* "Socket"-level control message types: */ 171#define SCM_RIGHTS 0x1010 /* access rights (array of int) */ 172#define SO_SECATTR 0x1011 /* socket's security attributes */ 173#define SCM_UCRED 0x1012 /* sender's ucred */ 174#define SO_TIMESTAMP 0x1013 /* socket-level timestamp option */ 175#define SCM_TIMESTAMP SO_TIMESTAMP /* socket control message timestamp */ 176#define SO_ALLZONES 0x1014 /* bind in all zones */ 177#define SO_EXCLBIND 0x1015 /* exclusive binding */ 178#define SO_MAC_IMPLICIT 0x1016 /* hide mac labels on wire */ 179#define SO_VRRP 0x1017 /* VRRP control socket */ 180 181#ifdef _KERNEL 182#define SO_SRCADDR 0x2001 /* Internal: AF_UNIX source address */ 183#define SO_FILEP 0x2002 /* Internal: AF_UNIX file pointer */ 184#define SO_UNIX_CLOSE 0x2003 /* Internal: AF_UNIX peer closed */ 185#endif /* _KERNEL */ 186 187/* 188 * Socket filter options 189 */ 190#define FIL_ATTACH 0x1 /* attach filter */ 191#define FIL_DETACH 0x2 /* detach filter */ 192#define FIL_LIST 0x3 /* list attached filters */ 193 194#define FILNAME_MAX 32 195/* 196 * Structure returned by FIL_LIST 197 */ 198struct fil_info { 199 int fi_flags; /* see below (FILF_*) */ 200 int fi_pos; /* position (0 is bottom) */ 201 char fi_name[FILNAME_MAX]; /* filter name */ 202}; 203 204#define FILF_PROG 0x1 /* programmatic attach */ 205#define FILF_AUTO 0x2 /* automatic attach */ 206#define FILF_BYPASS 0x4 /* filter is not active */ 207 208#ifdef _KERNEL 209/* 210 * new socket open flags to identify socket and acceptor streams 211 */ 212#define SO_ACCEPTOR 0x20000 /* acceptor socket */ 213#define SO_SOCKSTR 0x40000 /* normal socket stream */ 214#define SO_FALLBACK 0x80000 /* fallback to TPI socket */ 215 216/* 217 * Flags for socket_create() and socket_newconn() 218 */ 219#define SOCKET_SLEEP KM_SLEEP 220#define SOCKET_NOSLEEP KM_NOSLEEP 221 222#endif /* _KERNEL */ 223 224/* 225 * Structure used for manipulating linger option. 226 */ 227struct linger { 228 int l_onoff; /* option on/off */ 229 int l_linger; /* linger time */ 230}; 231 232/* 233 * Levels for (get/set)sockopt() that don't apply to a specific protocol. 234 */ 235#define SOL_SOCKET 0xffff /* options for socket level */ 236#if !defined(_XPG4_2) || defined(__EXTENSIONS__) 237#define SOL_ROUTE 0xfffe /* options for routing socket level */ 238#endif 239#define SOL_PACKET 0xfffd /* options for packet level */ 240#define SOL_FILTER 0xfffc /* options for socket filter level */ 241 242/* 243 * Address families. 244 * 245 * Some of these constant names are copied for the DTrace IP provider in 246 * usr/src/lib/libdtrace/common/{ip.d.in, ip.sed.in}, which should be kept 247 * in sync. 248 */ 249#define AF_UNSPEC 0 /* unspecified */ 250#define AF_UNIX 1 /* local to host (pipes, portals) */ 251#define AF_LOCAL AF_UNIX /* Synonym for AF_UNIX */ 252#define AF_FILE AF_UNIX /* Synonym for AF_UNIX */ 253#define AF_INET 2 /* internetwork: UDP, TCP, etc. */ 254#define AF_IMPLINK 3 /* arpanet imp addresses */ 255#define AF_PUP 4 /* pup protocols: e.g. BSP */ 256#define AF_CHAOS 5 /* mit CHAOS protocols */ 257#define AF_NS 6 /* XEROX NS protocols */ 258#define AF_NBS 7 /* nbs protocols */ 259#define AF_ECMA 8 /* european computer manufacturers */ 260#define AF_DATAKIT 9 /* datakit protocols */ 261#define AF_CCITT 10 /* CCITT protocols, X.25 etc */ 262#define AF_SNA 11 /* IBM SNA */ 263#define AF_DECnet 12 /* DECnet */ 264#define AF_DLI 13 /* Direct data link interface */ 265#define AF_LAT 14 /* LAT */ 266#define AF_HYLINK 15 /* NSC Hyperchannel */ 267#define AF_APPLETALK 16 /* Apple Talk */ 268#define AF_NIT 17 /* Network Interface Tap */ 269#define AF_802 18 /* IEEE 802.2, also ISO 8802 */ 270#define AF_OSI 19 /* umbrella for all families used */ 271#define AF_X25 20 /* CCITT X.25 in particular */ 272#define AF_OSINET 21 /* AFI = 47, IDI = 4 */ 273#define AF_GOSIP 22 /* U.S. Government OSI */ 274#define AF_IPX 23 /* Novell Internet Protocol */ 275#define AF_ROUTE 24 /* Internal Routing Protocol */ 276#define AF_LINK 25 /* Link-layer interface */ 277#define AF_INET6 26 /* Internet Protocol, Version 6 */ 278#define AF_KEY 27 /* Security Association DB socket */ 279#define AF_NCA 28 /* NCA socket */ 280#define AF_POLICY 29 /* Security Policy DB socket */ 281#define AF_INET_OFFLOAD 30 /* Sun private; do not use */ 282#define AF_TRILL 31 /* TRILL interface */ 283#define AF_PACKET 32 /* PF_PACKET Linux socket interface */ 284 285#define AF_MAX 32 286 287/* 288 * Protocol families, same as address families for now. 289 */ 290#define PF_UNSPEC AF_UNSPEC 291#define PF_UNIX AF_UNIX 292#define PF_LOCAL PF_UNIX 293#define PF_FILE PF_UNIX 294#define PF_INET AF_INET 295#define PF_IMPLINK AF_IMPLINK 296#define PF_PUP AF_PUP 297#define PF_CHAOS AF_CHAOS 298#define PF_NS AF_NS 299#define PF_NBS AF_NBS 300#define PF_ECMA AF_ECMA 301#define PF_DATAKIT AF_DATAKIT 302#define PF_CCITT AF_CCITT 303#define PF_SNA AF_SNA 304#define PF_DECnet AF_DECnet 305#define PF_DLI AF_DLI 306#define PF_LAT AF_LAT 307#define PF_HYLINK AF_HYLINK 308#define PF_APPLETALK AF_APPLETALK 309#define PF_NIT AF_NIT 310#define PF_802 AF_802 311#define PF_OSI AF_OSI 312#define PF_X25 AF_X25 313#define PF_OSINET AF_OSINET 314#define PF_GOSIP AF_GOSIP 315#define PF_IPX AF_IPX 316#define PF_ROUTE AF_ROUTE 317#define PF_LINK AF_LINK 318#define PF_INET6 AF_INET6 319#define PF_KEY AF_KEY 320#define PF_NCA AF_NCA 321#define PF_POLICY AF_POLICY 322#define PF_INET_OFFLOAD AF_INET_OFFLOAD /* Sun private; do not use */ 323#define PF_TRILL AF_TRILL 324#define PF_PACKET AF_PACKET 325 326#define PF_MAX AF_MAX 327 328/* 329 * Maximum queue length specifiable by listen. 330 */ 331#define SOMAXCONN 128 332 333/* 334 * Message header for recvmsg and sendmsg calls. 335 */ 336struct msghdr { 337 void *msg_name; /* optional address */ 338 socklen_t msg_namelen; /* size of address */ 339 struct iovec *msg_iov; /* scatter/gather array */ 340 int msg_iovlen; /* # elements in msg_iov */ 341 342#if defined(_XPG4_2) || defined(_KERNEL) 343 void *msg_control; /* ancillary data */ 344 socklen_t msg_controllen; /* ancillary data buffer len */ 345 int msg_flags; /* flags on received message */ 346#else 347 caddr_t msg_accrights; /* access rights sent/received */ 348 int msg_accrightslen; 349#endif /* defined(_XPG4_2) || defined(_KERNEL) */ 350}; 351 352#if defined(_KERNEL) 353 354/* 355 * N.B.: we assume that omsghdr and nmsghdr are isomorphic, with 356 * the sole exception that nmsghdr has the additional msg_flags 357 * field at the end. 358 */ 359struct omsghdr { 360 void *msg_name; /* optional address */ 361 socklen_t msg_namelen; /* size of address */ 362 struct iovec *msg_iov; /* scatter/gather array */ 363 int msg_iovlen; /* # elements in msg_iov */ 364 caddr_t msg_accrights; /* access rights sent/received */ 365 int msg_accrightslen; 366}; 367 368#define nmsghdr msghdr 369 370#if defined(_SYSCALL32) 371 372struct omsghdr32 { 373 caddr32_t msg_name; /* optional address */ 374 uint32_t msg_namelen; /* size of address */ 375 caddr32_t msg_iov; /* scatter/gather array */ 376 int32_t msg_iovlen; /* # elements in msg_iov */ 377 caddr32_t msg_accrights; /* access rights sent/received */ 378 uint32_t msg_accrightslen; 379}; 380 381struct msghdr32 { 382 caddr32_t msg_name; /* optional address */ 383 uint32_t msg_namelen; /* size of address */ 384 caddr32_t msg_iov; /* scatter/gather array */ 385 int32_t msg_iovlen; /* # elements in msg_iov */ 386 caddr32_t msg_control; /* ancillary data */ 387 uint32_t msg_controllen; /* ancillary data buffer len */ 388 int32_t msg_flags; /* flags on received message */ 389}; 390 391#define nmsghdr32 msghdr32 392 393#endif /* _SYSCALL32 */ 394#endif /* _KERNEL */ 395 396#define MSG_OOB 0x1 /* process out-of-band data */ 397#define MSG_PEEK 0x2 /* peek at incoming message */ 398#define MSG_DONTROUTE 0x4 /* send without using routing tables */ 399/* Added for XPGv2 compliance */ 400#define MSG_EOR 0x8 /* Terminates a record */ 401#define MSG_CTRUNC 0x10 /* Control data truncated */ 402#define MSG_TRUNC 0x20 /* Normal data truncated */ 403#define MSG_WAITALL 0x40 /* Wait for complete recv or error */ 404#define MSG_DUPCTRL 0x800 /* Save control message for use with */ 405 /* with left over data */ 406/* End of XPGv2 compliance */ 407#define MSG_DONTWAIT 0x80 /* Don't block for this recv */ 408#define MSG_NOTIFICATION 0x100 /* Notification, not data */ 409#define MSG_XPG4_2 0x8000 /* Private: XPG4.2 flag */ 410 411#define MSG_MAXIOVLEN 16 412 413#ifdef _KERNEL 414 415/* 416 * for kernel socket only 417 */ 418#define MSG_MBLK_QUICKRELE 0x10000000 /* free mblk chain */ 419 /* in timely manner */ 420#define MSG_USERSPACE 0x20000000 /* buffer from user space */ 421 422#endif /* _KERNEL */ 423 424 425/* Added for XPGv2 compliance */ 426#define SHUT_RD 0 427#define SHUT_WR 1 428#define SHUT_RDWR 2 429 430struct cmsghdr { 431 socklen_t cmsg_len; /* data byte count, including hdr */ 432 int cmsg_level; /* originating protocol */ 433 int cmsg_type; /* protocol-specific type */ 434}; 435 436#if defined(_XPG4_2) || defined(_KERNEL) 437#if defined(__sparc) 438/* To maintain backward compatibility, alignment needs to be 8 on sparc. */ 439#define _CMSG_HDR_ALIGNMENT 8 440#else 441/* for __i386 (and other future architectures) */ 442#define _CMSG_HDR_ALIGNMENT 4 443#endif /* defined(__sparc) */ 444#endif /* defined(_XPG4_2) || defined(_KERNEL) */ 445 446#if defined(_XPG4_2) 447/* 448 * The cmsg headers (and macros dealing with them) were made available as 449 * part of UNIX95 and hence need to be protected with a _XPG4_2 define. 450 */ 451#define _CMSG_DATA_ALIGNMENT (sizeof (int)) 452#define _CMSG_HDR_ALIGN(x) (((uintptr_t)(x) + _CMSG_HDR_ALIGNMENT - 1) & \ 453 ~(_CMSG_HDR_ALIGNMENT - 1)) 454#define _CMSG_DATA_ALIGN(x) (((uintptr_t)(x) + _CMSG_DATA_ALIGNMENT - 1) & \ 455 ~(_CMSG_DATA_ALIGNMENT - 1)) 456#define CMSG_DATA(c) \ 457 ((unsigned char *)_CMSG_DATA_ALIGN((struct cmsghdr *)(c) + 1)) 458 459#define CMSG_FIRSTHDR(m) \ 460 (((m)->msg_controllen < sizeof (struct cmsghdr)) ? \ 461 (struct cmsghdr *)0 : (struct cmsghdr *)((m)->msg_control)) 462 463#define CMSG_NXTHDR(m, c) \ 464 (((c) == 0) ? CMSG_FIRSTHDR(m) : \ 465 ((((uintptr_t)_CMSG_HDR_ALIGN((char *)(c) + \ 466 ((struct cmsghdr *)(c))->cmsg_len) + sizeof (struct cmsghdr)) > \ 467 (((uintptr_t)((struct msghdr *)(m))->msg_control) + \ 468 ((uintptr_t)((struct msghdr *)(m))->msg_controllen))) ? \ 469 ((struct cmsghdr *)0) : \ 470 ((struct cmsghdr *)_CMSG_HDR_ALIGN((char *)(c) + \ 471 ((struct cmsghdr *)(c))->cmsg_len)))) 472 473/* Amount of space + padding needed for a message of length l */ 474#define CMSG_SPACE(l) \ 475 ((unsigned int)_CMSG_HDR_ALIGN(sizeof (struct cmsghdr) + (l))) 476 477/* Value to be used in cmsg_len, does not include trailing padding */ 478#define CMSG_LEN(l) \ 479 ((unsigned int)_CMSG_DATA_ALIGN(sizeof (struct cmsghdr)) + (l)) 480 481#endif /* _XPG4_2 */ 482 483#ifdef _XPG4_2 484#ifdef __PRAGMA_REDEFINE_EXTNAME 485#pragma redefine_extname bind __xnet_bind 486#pragma redefine_extname connect __xnet_connect 487#pragma redefine_extname recvmsg __xnet_recvmsg 488#pragma redefine_extname sendmsg __xnet_sendmsg 489#pragma redefine_extname sendto __xnet_sendto 490#pragma redefine_extname socket __xnet_socket 491#pragma redefine_extname socketpair __xnet_socketpair 492#pragma redefine_extname getsockopt __xnet_getsockopt 493#else /* __PRAGMA_REDEFINE_EXTNAME */ 494#define bind __xnet_bind 495#define connect __xnet_connect 496#define recvmsg __xnet_recvmsg 497#define sendmsg __xnet_sendmsg 498#define sendto __xnet_sendto 499#define socket __xnet_socket 500#define socketpair __xnet_socketpair 501#define getsockopt __xnet_getsockopt 502#endif /* __PRAGMA_REDEFINE_EXTNAME */ 503 504#endif /* _XPG4_2 */ 505 506#if defined(_XPG4_2) && !defined(_XPG5) 507#ifdef __PRAGMA_REDEFINE_EXTNAME 508#pragma redefine_extname listen __xnet_listen 509#else /* __PRAGMA_REDEFINE_EXTNAME */ 510#define listen __xnet_listen 511#endif /* __PRAGMA_REDEFINE_EXTNAME */ 512#endif /* (_XPG4_2) && !defined(_XPG5) */ 513 514#if !defined(_KERNEL) || defined(_BOOT) 515#ifdef __STDC__ 516extern int accept(int, struct sockaddr *_RESTRICT_KYWD, Psocklen_t); 517extern int bind(int, const struct sockaddr *, socklen_t); 518extern int connect(int, const struct sockaddr *, socklen_t); 519extern int getpeername(int, struct sockaddr *_RESTRICT_KYWD, Psocklen_t); 520extern int getsockname(int, struct sockaddr *_RESTRICT_KYWD, Psocklen_t); 521extern int getsockopt(int, int, int, void *_RESTRICT_KYWD, Psocklen_t); 522extern int listen(int, int); /* XXX - fixme??? where do I go */ 523extern int socketpair(int, int, int, int *); 524extern ssize_t recv(int, void *, size_t, int); 525extern ssize_t recvfrom(int, void *_RESTRICT_KYWD, size_t, int, 526 struct sockaddr *_RESTRICT_KYWD, Psocklen_t); 527extern ssize_t recvmsg(int, struct msghdr *, int); 528extern ssize_t send(int, const void *, size_t, int); 529extern ssize_t sendmsg(int, const struct msghdr *, int); 530extern ssize_t sendto(int, const void *, size_t, int, const struct sockaddr *, 531 socklen_t); 532extern int setsockopt(int, int, int, const void *, socklen_t); 533extern int shutdown(int, int); 534extern int socket(int, int, int); 535 536#if !defined(_XPG4_2) || defined(_XPG6) || defined(__EXTENSIONS__) 537extern int sockatmark(int); 538#endif /* !defined(_XPG4_2) || defined(_XPG6) || defined(__EXTENSIONS__) */ 539#else /* __STDC__ */ 540extern int accept(); 541extern int bind(); 542extern int connect(); 543extern int getpeername(); 544extern int getsockname(); 545extern int getsockopt(); 546extern int listen(); 547extern int recv(); 548extern int recvfrom(); 549extern int send(); 550extern int sendto(); 551extern int setsockopt(); 552extern int sockatmark(); 553extern int socket(); 554extern int recvmsg(); 555extern int sendmsg(); 556extern int shutdown(); 557extern int socketpair(); 558#endif /* __STDC__ */ 559#endif /* !defined(_KERNEL) || defined(_BOOT) */ 560 561#ifdef __cplusplus 562} 563#endif 564 565#endif /* _SYS_SOCKET_H */ 566