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 #define SO_MAC_IMPLICIT 0x1016 /* hide mac labels on wire */ 180 #define SO_VRRP 0x1017 /* VRRP control socket */ 181 182 #ifdef _KERNEL 183 #define SO_SRCADDR 0x2001 /* Internal: AF_UNIX source address */ 184 #define SO_FILEP 0x2002 /* Internal: AF_UNIX file pointer */ 185 #define SO_UNIX_CLOSE 0x2003 /* Internal: AF_UNIX peer closed */ 186 #endif /* _KERNEL */ 187 188 #ifdef _KERNEL 189 /* 190 * new socket open flags to identify socket and acceptor streams 191 */ 192 #define SO_ACCEPTOR 0x20000 /* acceptor socket */ 193 #define SO_SOCKSTR 0x40000 /* normal socket stream */ 194 #define SO_FALLBACK 0x80000 /* fallback to TPI socket */ 195 196 /* 197 * Flags for socket_create() and socket_newconn() 198 */ 199 #define SOCKET_SLEEP KM_SLEEP 200 #define SOCKET_NOSLEEP KM_NOSLEEP 201 202 203 /* 204 * flags used by sockfs when falling back to tpi socket 205 */ 206 #define SO_FB_START 0x1 207 #define SO_FB_FINISH 0x2 208 209 #endif /* _KERNEL */ 210 211 /* 212 * Structure used for manipulating linger option. 213 */ 214 struct linger { 215 int l_onoff; /* option on/off */ 216 int l_linger; /* linger time */ 217 }; 218 219 /* 220 * Levels for (get/set)sockopt() that don't apply to a specific protocol. 221 */ 222 #define SOL_SOCKET 0xffff /* options for socket level */ 223 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 224 #define SOL_ROUTE 0xfffe /* options for routing socket level */ 225 #endif 226 #define SOL_PACKET 0xfffd /* options for packet level */ 227 228 /* 229 * Address families. 230 * 231 * Some of these constant names are copied for the DTrace IP provider in 232 * usr/src/lib/libdtrace/common/{ip.d.in, ip.sed.in}, which should be kept 233 * in sync. 234 */ 235 #define AF_UNSPEC 0 /* unspecified */ 236 #define AF_UNIX 1 /* local to host (pipes, portals) */ 237 #define AF_LOCAL AF_UNIX /* Synonym for AF_UNIX */ 238 #define AF_FILE AF_UNIX /* Synonym for AF_UNIX */ 239 #define AF_INET 2 /* internetwork: UDP, TCP, etc. */ 240 #define AF_IMPLINK 3 /* arpanet imp addresses */ 241 #define AF_PUP 4 /* pup protocols: e.g. BSP */ 242 #define AF_CHAOS 5 /* mit CHAOS protocols */ 243 #define AF_NS 6 /* XEROX NS protocols */ 244 #define AF_NBS 7 /* nbs protocols */ 245 #define AF_ECMA 8 /* european computer manufacturers */ 246 #define AF_DATAKIT 9 /* datakit protocols */ 247 #define AF_CCITT 10 /* CCITT protocols, X.25 etc */ 248 #define AF_SNA 11 /* IBM SNA */ 249 #define AF_DECnet 12 /* DECnet */ 250 #define AF_DLI 13 /* Direct data link interface */ 251 #define AF_LAT 14 /* LAT */ 252 #define AF_HYLINK 15 /* NSC Hyperchannel */ 253 #define AF_APPLETALK 16 /* Apple Talk */ 254 #define AF_NIT 17 /* Network Interface Tap */ 255 #define AF_802 18 /* IEEE 802.2, also ISO 8802 */ 256 #define AF_OSI 19 /* umbrella for all families used */ 257 #define AF_X25 20 /* CCITT X.25 in particular */ 258 #define AF_OSINET 21 /* AFI = 47, IDI = 4 */ 259 #define AF_GOSIP 22 /* U.S. Government OSI */ 260 #define AF_IPX 23 /* Novell Internet Protocol */ 261 #define AF_ROUTE 24 /* Internal Routing Protocol */ 262 #define AF_LINK 25 /* Link-layer interface */ 263 #define AF_INET6 26 /* Internet Protocol, Version 6 */ 264 #define AF_KEY 27 /* Security Association DB socket */ 265 #define AF_NCA 28 /* NCA socket */ 266 #define AF_POLICY 29 /* Security Policy DB socket */ 267 #define AF_INET_OFFLOAD 30 /* Sun private; do not use */ 268 #define AF_TRILL 31 /* TRILL interface */ 269 #define AF_PACKET 32 /* PF_PACKET Linux socket interface */ 270 271 #define AF_MAX 32 272 273 /* 274 * Protocol families, same as address families for now. 275 */ 276 #define PF_UNSPEC AF_UNSPEC 277 #define PF_UNIX AF_UNIX 278 #define PF_LOCAL PF_UNIX 279 #define PF_FILE PF_UNIX 280 #define PF_INET AF_INET 281 #define PF_IMPLINK AF_IMPLINK 282 #define PF_PUP AF_PUP 283 #define PF_CHAOS AF_CHAOS 284 #define PF_NS AF_NS 285 #define PF_NBS AF_NBS 286 #define PF_ECMA AF_ECMA 287 #define PF_DATAKIT AF_DATAKIT 288 #define PF_CCITT AF_CCITT 289 #define PF_SNA AF_SNA 290 #define PF_DECnet AF_DECnet 291 #define PF_DLI AF_DLI 292 #define PF_LAT AF_LAT 293 #define PF_HYLINK AF_HYLINK 294 #define PF_APPLETALK AF_APPLETALK 295 #define PF_NIT AF_NIT 296 #define PF_802 AF_802 297 #define PF_OSI AF_OSI 298 #define PF_X25 AF_X25 299 #define PF_OSINET AF_OSINET 300 #define PF_GOSIP AF_GOSIP 301 #define PF_IPX AF_IPX 302 #define PF_ROUTE AF_ROUTE 303 #define PF_LINK AF_LINK 304 #define PF_INET6 AF_INET6 305 #define PF_KEY AF_KEY 306 #define PF_NCA AF_NCA 307 #define PF_POLICY AF_POLICY 308 #define PF_INET_OFFLOAD AF_INET_OFFLOAD /* Sun private; do not use */ 309 #define PF_TRILL AF_TRILL 310 #define PF_PACKET AF_PACKET 311 312 #define PF_MAX AF_MAX 313 314 /* 315 * Maximum queue length specifiable by listen. 316 */ 317 #define SOMAXCONN 128 318 319 /* 320 * Message header for recvmsg and sendmsg calls. 321 */ 322 struct msghdr { 323 void *msg_name; /* optional address */ 324 socklen_t msg_namelen; /* size of address */ 325 struct iovec *msg_iov; /* scatter/gather array */ 326 int msg_iovlen; /* # elements in msg_iov */ 327 328 #if defined(_XPG4_2) || defined(_KERNEL) 329 void *msg_control; /* ancillary data */ 330 socklen_t msg_controllen; /* ancillary data buffer len */ 331 int msg_flags; /* flags on received message */ 332 #else 333 caddr_t msg_accrights; /* access rights sent/received */ 334 int msg_accrightslen; 335 #endif /* defined(_XPG4_2) || defined(_KERNEL) */ 336 }; 337 338 #if defined(_KERNEL) 339 340 /* 341 * N.B.: we assume that omsghdr and nmsghdr are isomorphic, with 342 * the sole exception that nmsghdr has the additional msg_flags 343 * field at the end. 344 */ 345 struct omsghdr { 346 void *msg_name; /* optional address */ 347 socklen_t msg_namelen; /* size of address */ 348 struct iovec *msg_iov; /* scatter/gather array */ 349 int msg_iovlen; /* # elements in msg_iov */ 350 caddr_t msg_accrights; /* access rights sent/received */ 351 int msg_accrightslen; 352 }; 353 354 #define nmsghdr msghdr 355 356 #if defined(_SYSCALL32) 357 358 struct omsghdr32 { 359 caddr32_t msg_name; /* optional address */ 360 uint32_t msg_namelen; /* size of address */ 361 caddr32_t msg_iov; /* scatter/gather array */ 362 int32_t msg_iovlen; /* # elements in msg_iov */ 363 caddr32_t msg_accrights; /* access rights sent/received */ 364 uint32_t msg_accrightslen; 365 }; 366 367 struct msghdr32 { 368 caddr32_t msg_name; /* optional address */ 369 uint32_t msg_namelen; /* size of address */ 370 caddr32_t msg_iov; /* scatter/gather array */ 371 int32_t msg_iovlen; /* # elements in msg_iov */ 372 caddr32_t msg_control; /* ancillary data */ 373 uint32_t msg_controllen; /* ancillary data buffer len */ 374 int32_t msg_flags; /* flags on received message */ 375 }; 376 377 #define nmsghdr32 msghdr32 378 379 #endif /* _SYSCALL32 */ 380 #endif /* _KERNEL */ 381 382 #define MSG_OOB 0x1 /* process out-of-band data */ 383 #define MSG_PEEK 0x2 /* peek at incoming message */ 384 #define MSG_DONTROUTE 0x4 /* send without using routing tables */ 385 /* Added for XPGv2 compliance */ 386 #define MSG_EOR 0x8 /* Terminates a record */ 387 #define MSG_CTRUNC 0x10 /* Control data truncated */ 388 #define MSG_TRUNC 0x20 /* Normal data truncated */ 389 #define MSG_WAITALL 0x40 /* Wait for complete recv or error */ 390 #define MSG_DUPCTRL 0x800 /* Save control message for use with */ 391 /* with left over data */ 392 /* End of XPGv2 compliance */ 393 #define MSG_DONTWAIT 0x80 /* Don't block for this recv */ 394 #define MSG_NOTIFICATION 0x100 /* Notification, not data */ 395 #define MSG_XPG4_2 0x8000 /* Private: XPG4.2 flag */ 396 397 #define MSG_MAXIOVLEN 16 398 399 #ifdef _KERNEL 400 401 /* 402 * for kernel socket only 403 */ 404 #define MSG_MBLK_QUICKRELE 0x10000000 /* free mblk chain */ 405 /* in timely manner */ 406 #define MSG_USERSPACE 0x20000000 /* buffer from user space */ 407 408 #endif /* _KERNEL */ 409 410 411 /* Added for XPGv2 compliance */ 412 #define SHUT_RD 0 413 #define SHUT_WR 1 414 #define SHUT_RDWR 2 415 416 struct cmsghdr { 417 socklen_t cmsg_len; /* data byte count, including hdr */ 418 int cmsg_level; /* originating protocol */ 419 int cmsg_type; /* protocol-specific type */ 420 }; 421 422 #if defined(_XPG4_2) || defined(_KERNEL) 423 #if defined(__sparc) 424 /* To maintain backward compatibility, alignment needs to be 8 on sparc. */ 425 #define _CMSG_HDR_ALIGNMENT 8 426 #else 427 /* for __i386 (and other future architectures) */ 428 #define _CMSG_HDR_ALIGNMENT 4 429 #endif /* defined(__sparc) */ 430 #endif /* defined(_XPG4_2) || defined(_KERNEL) */ 431 432 #if defined(_XPG4_2) 433 /* 434 * The cmsg headers (and macros dealing with them) were made available as 435 * part of UNIX95 and hence need to be protected with a _XPG4_2 define. 436 */ 437 #define _CMSG_DATA_ALIGNMENT (sizeof (int)) 438 #define _CMSG_HDR_ALIGN(x) (((uintptr_t)(x) + _CMSG_HDR_ALIGNMENT - 1) & \ 439 ~(_CMSG_HDR_ALIGNMENT - 1)) 440 #define _CMSG_DATA_ALIGN(x) (((uintptr_t)(x) + _CMSG_DATA_ALIGNMENT - 1) & \ 441 ~(_CMSG_DATA_ALIGNMENT - 1)) 442 #define CMSG_DATA(c) \ 443 ((unsigned char *)_CMSG_DATA_ALIGN((struct cmsghdr *)(c) + 1)) 444 445 #define CMSG_FIRSTHDR(m) \ 446 (((m)->msg_controllen < sizeof (struct cmsghdr)) ? \ 447 (struct cmsghdr *)0 : (struct cmsghdr *)((m)->msg_control)) 448 449 #define CMSG_NXTHDR(m, c) \ 450 (((c) == 0) ? CMSG_FIRSTHDR(m) : \ 451 ((((uintptr_t)_CMSG_HDR_ALIGN((char *)(c) + \ 452 ((struct cmsghdr *)(c))->cmsg_len) + sizeof (struct cmsghdr)) > \ 453 (((uintptr_t)((struct msghdr *)(m))->msg_control) + \ 454 ((uintptr_t)((struct msghdr *)(m))->msg_controllen))) ? \ 455 ((struct cmsghdr *)0) : \ 456 ((struct cmsghdr *)_CMSG_HDR_ALIGN((char *)(c) + \ 457 ((struct cmsghdr *)(c))->cmsg_len)))) 458 459 /* Amount of space + padding needed for a message of length l */ 460 #define CMSG_SPACE(l) \ 461 ((unsigned int)_CMSG_HDR_ALIGN(sizeof (struct cmsghdr) + (l))) 462 463 /* Value to be used in cmsg_len, does not include trailing padding */ 464 #define CMSG_LEN(l) \ 465 ((unsigned int)_CMSG_DATA_ALIGN(sizeof (struct cmsghdr)) + (l)) 466 467 #endif /* _XPG4_2 */ 468 469 #ifdef _XPG4_2 470 #ifdef __PRAGMA_REDEFINE_EXTNAME 471 #pragma redefine_extname bind __xnet_bind 472 #pragma redefine_extname connect __xnet_connect 473 #pragma redefine_extname recvmsg __xnet_recvmsg 474 #pragma redefine_extname sendmsg __xnet_sendmsg 475 #pragma redefine_extname sendto __xnet_sendto 476 #pragma redefine_extname socket __xnet_socket 477 #pragma redefine_extname socketpair __xnet_socketpair 478 #pragma redefine_extname getsockopt __xnet_getsockopt 479 #else /* __PRAGMA_REDEFINE_EXTNAME */ 480 #define bind __xnet_bind 481 #define connect __xnet_connect 482 #define recvmsg __xnet_recvmsg 483 #define sendmsg __xnet_sendmsg 484 #define sendto __xnet_sendto 485 #define socket __xnet_socket 486 #define socketpair __xnet_socketpair 487 #define getsockopt __xnet_getsockopt 488 #endif /* __PRAGMA_REDEFINE_EXTNAME */ 489 490 #endif /* _XPG4_2 */ 491 492 #if defined(_XPG4_2) && !defined(_XPG5) 493 #ifdef __PRAGMA_REDEFINE_EXTNAME 494 #pragma redefine_extname listen __xnet_listen 495 #else /* __PRAGMA_REDEFINE_EXTNAME */ 496 #define listen __xnet_listen 497 #endif /* __PRAGMA_REDEFINE_EXTNAME */ 498 #endif /* (_XPG4_2) && !defined(_XPG5) */ 499 500 #if !defined(_KERNEL) || defined(_BOOT) 501 #ifdef __STDC__ 502 extern int accept(int, struct sockaddr *_RESTRICT_KYWD, Psocklen_t); 503 extern int bind(int, const struct sockaddr *, socklen_t); 504 extern int connect(int, const struct sockaddr *, socklen_t); 505 extern int getpeername(int, struct sockaddr *_RESTRICT_KYWD, Psocklen_t); 506 extern int getsockname(int, struct sockaddr *_RESTRICT_KYWD, Psocklen_t); 507 extern int getsockopt(int, int, int, void *_RESTRICT_KYWD, Psocklen_t); 508 extern int listen(int, int); /* XXX - fixme??? where do I go */ 509 extern int socketpair(int, int, int, int *); 510 extern ssize_t recv(int, void *, size_t, int); 511 extern ssize_t recvfrom(int, void *_RESTRICT_KYWD, size_t, int, 512 struct sockaddr *_RESTRICT_KYWD, Psocklen_t); 513 extern ssize_t recvmsg(int, struct msghdr *, int); 514 extern ssize_t send(int, const void *, size_t, int); 515 extern ssize_t sendmsg(int, const struct msghdr *, int); 516 extern ssize_t sendto(int, const void *, size_t, int, const struct sockaddr *, 517 socklen_t); 518 extern int setsockopt(int, int, int, const void *, socklen_t); 519 extern int shutdown(int, int); 520 extern int socket(int, int, int); 521 522 #if !defined(_XPG4_2) || defined(_XPG6) || defined(__EXTENSIONS__) 523 extern int sockatmark(int); 524 #endif /* !defined(_XPG4_2) || defined(_XPG6) || defined(__EXTENSIONS__) */ 525 #else /* __STDC__ */ 526 extern int accept(); 527 extern int bind(); 528 extern int connect(); 529 extern int getpeername(); 530 extern int getsockname(); 531 extern int getsockopt(); 532 extern int listen(); 533 extern int recv(); 534 extern int recvfrom(); 535 extern int send(); 536 extern int sendto(); 537 extern int setsockopt(); 538 extern int sockatmark(); 539 extern int socket(); 540 extern int recvmsg(); 541 extern int sendmsg(); 542 extern int shutdown(); 543 extern int socketpair(); 544 #endif /* __STDC__ */ 545 #endif /* !defined(_KERNEL) || defined(_BOOT) */ 546 547 #ifdef __cplusplus 548 } 549 #endif 550 551 #endif /* _SYS_SOCKET_H */ 552