bsd/sys/socket.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /* Copyright (c) 1998, 1999 Apple Computer, Inc. All Rights Reserved */
  26 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  27 /*
  28  * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
  29  *      The Regents of the University of California.  All rights reserved.
  30  *
  31  * Redistribution and use in source and binary forms, with or without
  32  * modification, are permitted provided that the following conditions
  33  * are met:
  34  * 1. Redistributions of source code must retain the above copyright
  35  *    notice, this list of conditions and the following disclaimer.
  36  * 2. Redistributions in binary form must reproduce the above copyright
  37  *    notice, this list of conditions and the following disclaimer in the
  38  *    documentation and/or other materials provided with the distribution.
  39  * 3. All advertising materials mentioning features or use of this software
  40  *    must display the following acknowledgement:
  41  *      This product includes software developed by the University of
  42  *      California, Berkeley and its contributors.
  43  * 4. Neither the name of the University nor the names of its contributors
  44  *    may be used to endorse or promote products derived from this software
  45  *    without specific prior written permission.
  46  *
  47  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  48  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  50  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  51  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  52  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  53  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  54  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  55  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  57  * SUCH DAMAGE.
  58  *
  59  *      @(#)socket.h    8.4 (Berkeley) 2/21/94
  60  * $FreeBSD: src/sys/sys/socket.h,v 1.39.2.7 2001/07/03 11:02:01 ume Exp $
  61  */
  62
  63 #ifndef _SYS_SOCKET_H_
  64 #define _SYS_SOCKET_H_
  65
  66 #ifndef __APPLE__
  67 #include <machine/ansi.h>
  68 #endif
  69 #define _NO_NAMESPACE_POLLUTION
  70 #include <machine/param.h>
  71 #undef _NO_NAMESPACE_POLLUTION
  72
  73 /*
  74  * Definitions related to sockets: types, address families, options.
  75  */
  76
  77 /*
  78  * Data types.
  79  */
  80 typedef u_char          sa_family_t;
  81 #ifdef  _BSD_SOCKLEN_T_
  82 typedef _BSD_SOCKLEN_T_ socklen_t;
  83 #undef  _BSD_SOCKLEN_T_
  84 #endif
  85
  86 /*
  87  * Types
  88  */
  89 #define SOCK_STREAM     1               /* stream socket */
  90 #define SOCK_DGRAM      2               /* datagram socket */
  91 #define SOCK_RAW        3               /* raw-protocol interface */
  92 #define SOCK_RDM        4               /* reliably-delivered message */
  93 #define SOCK_SEQPACKET  5               /* sequenced packet stream */
  94
  95 /*
  96  * Option flags per-socket.
  97  */
  98 #define SO_DEBUG        0x0001          /* turn on debugging info recording */
  99 #define SO_ACCEPTCONN   0x0002          /* socket has had listen() */
 100 #define SO_REUSEADDR    0x0004          /* allow local address reuse */
 101 #define SO_KEEPALIVE    0x0008          /* keep connections alive */
 102 #define SO_DONTROUTE    0x0010          /* just use interface addresses */
 103 #define SO_BROADCAST    0x0020          /* permit sending of broadcast msgs */
 104 #define SO_USELOOPBACK  0x0040          /* bypass hardware when possible */
 105 #define SO_LINGER       0x0080          /* linger on close if data present */
 106 #define SO_OOBINLINE    0x0100          /* leave received OOB data in line */
 107 #define SO_REUSEPORT    0x0200          /* allow local address & port reuse */
 108 #define SO_TIMESTAMP    0x0400          /* timestamp received dgram traffic */
 109 #ifndef __APPLE__
 110 #define SO_ACCEPTFILTER 0x1000          /* there is an accept filter */
 111 #else
 112 #define SO_DONTTRUNC    0x2000          /* APPLE: Retain unread data */
 113                                         /*  (ATOMIC proto) */
 114 #define SO_WANTMORE             0x4000          /* APPLE: Give hint when more data ready */
 115 #define SO_WANTOOBFLAG  0x8000          /* APPLE: Want OOB in MSG_FLAG on receive */
 116 #endif
 117
 118 /*
 119  * Additional options, not kept in so_options.
 120  */
 121 #define SO_SNDBUF       0x1001          /* send buffer size */
 122 #define SO_RCVBUF       0x1002          /* receive buffer size */
 123 #define SO_SNDLOWAT     0x1003          /* send low-water mark */
 124 #define SO_RCVLOWAT     0x1004          /* receive low-water mark */
 125 #define SO_SNDTIMEO     0x1005          /* send timeout */
 126 #define SO_RCVTIMEO     0x1006          /* receive timeout */
 127 #define SO_ERROR        0x1007          /* get error status and clear */
 128 #define SO_TYPE         0x1008          /* get socket type */
 129 /*efine SO_PRIVSTATE    0x1009             get/deny privileged state */
 130 #ifdef __APPLE__
 131 #define SO_NREAD        0x1020          /* APPLE: get 1st-packet byte count */
 132 #define SO_NKE          0x1021          /* APPLE: Install socket-level NKE */
 133 #define SO_NOSIGPIPE    0x1022          /* APPLE: No SIGPIPE on EPIPE */
 134 #define SO_NOADDRERR    0x1023          /* APPLE: Returns EADDRNOTAVAIL when src is not available anymore */
 135 #endif
 136 /*
 137  * Structure used for manipulating linger option.
 138  */
 139 struct  linger {
 140         int     l_onoff;                /* option on/off */
 141         int     l_linger;               /* linger time */
 142 };
 143
 144 #ifndef __APPLE__
 145 struct  accept_filter_arg {
 146         char    af_name[16];
 147         char    af_arg[256-16];
 148 };
 149 #endif
 150
 151 /*
 152  * Level number for (get/set)sockopt() to apply to socket itself.
 153  */
 154 #define SOL_SOCKET      0xffff          /* options for socket level */
 155
 156 /*
 157  * Address families.
 158  */
 159 #define AF_UNSPEC       0               /* unspecified */
 160 #define AF_LOCAL        1               /* local to host (pipes) */
 161 #define AF_UNIX         AF_LOCAL        /* backward compatibility */
 162 #define AF_INET         2               /* internetwork: UDP, TCP, etc. */
 163 #define AF_IMPLINK      3               /* arpanet imp addresses */
 164 #define AF_PUP          4               /* pup protocols: e.g. BSP */
 165 #define AF_CHAOS        5               /* mit CHAOS protocols */
 166 #define AF_NS           6               /* XEROX NS protocols */
 167 #define AF_ISO          7               /* ISO protocols */
 168 #define AF_OSI          AF_ISO
 169 #define AF_ECMA         8               /* European computer manufacturers */
 170 #define AF_DATAKIT      9               /* datakit protocols */
 171 #define AF_CCITT        10              /* CCITT protocols, X.25 etc */
 172 #define AF_SNA          11              /* IBM SNA */
 173 #define AF_DECnet       12              /* DECnet */
 174 #define AF_DLI          13              /* DEC Direct data link interface */
 175 #define AF_LAT          14              /* LAT */
 176 #define AF_HYLINK       15              /* NSC Hyperchannel */
 177 #define AF_APPLETALK    16              /* Apple Talk */
 178 #define AF_ROUTE        17              /* Internal Routing Protocol */
 179 #define AF_LINK         18              /* Link layer interface */
 180 #define pseudo_AF_XTP   19              /* eXpress Transfer Protocol (no AF) */
 181 #define AF_COIP         20              /* connection-oriented IP, aka ST II */
 182 #define AF_CNT          21              /* Computer Network Technology */
 183 #define pseudo_AF_RTIP  22              /* Help Identify RTIP packets */
 184 #define AF_IPX          23              /* Novell Internet Protocol */
 185 #define AF_SIP          24              /* Simple Internet Protocol */
 186 #define pseudo_AF_PIP   25              /* Help Identify PIP packets */
 187 #ifdef __APPLE__
 188 /*define pseudo_AF_BLUE 26         Identify packets for Blue Box - Not used */
 189 #define AF_NDRV         27              /* Network Driver 'raw' access */
 190 #endif
 191 #define AF_ISDN         28              /* Integrated Services Digital Network*/
 192 #define AF_E164         AF_ISDN         /* CCITT E.164 recommendation */
 193 #define pseudo_AF_KEY   29              /* Internal key-management function */
 194 #define AF_INET6        30              /* IPv6 */
 195 #define AF_NATM         31              /* native ATM access */
 196 #ifdef __APPLE__
 197 #define AF_SYSTEM       32              /* Kernel event messages */
 198 #define AF_NETBIOS      33              /* NetBIOS */
 199 #define AF_PPP          34              /* PPP communication protocol */
 200 #else
 201 #define AF_ATM          30              /* ATM */
 202 #endif
 203 #define pseudo_AF_HDRCMPLT 35           /* Used by BPF to not rewrite headers
 204                                          * in interface output routine
 205                                          */
 206 #ifndef __APPLE__
 207 #define AF_NETGRAPH     32              /* Netgraph sockets */
 208 #endif
 209 #define AF_MAX          36
 210
 211 /*
 212  * Structure used by kernel to store most
 213  * addresses.
 214  */
 215 struct sockaddr {
 216         u_char  sa_len;                 /* total length */
 217         u_char  sa_family;              /* address family */
 218         char            sa_data[14];            /* actually longer; address value */
 219 };
 220 #define SOCK_MAXADDRLEN 255             /* longest possible addresses */
 221
 222 /*
 223  * Structure used by kernel to pass protocol
 224  * information in raw sockets.
 225  */
 226 struct sockproto {
 227         u_short sp_family;              /* address family */
 228         u_short sp_protocol;            /* protocol */
 229 };
 230
 231 /*
 232  * RFC 2553: protocol-independent placeholder for socket addresses
 233  */
 234 #define _SS_MAXSIZE     128
 235 #define _SS_ALIGNSIZE   (sizeof(int64_t))
 236 #define _SS_PAD1SIZE    (_SS_ALIGNSIZE - sizeof(u_char) - sizeof(sa_family_t))
 237 #define _SS_PAD2SIZE    (_SS_MAXSIZE - sizeof(u_char) - sizeof(sa_family_t) - \
 238                                 _SS_PAD1SIZE - _SS_ALIGNSIZE)
 239
 240 struct sockaddr_storage {
 241         u_char          ss_len;         /* address length */
 242         sa_family_t     ss_family;      /* address family */
 243         char                    __ss_pad1[_SS_PAD1SIZE];
 244         int64_t         __ss_align;     /* force desired structure storage alignment */
 245         char                    __ss_pad2[_SS_PAD2SIZE];
 246 };
 247
 248 /*
 249  * Protocol families, same as address families for now.
 250  */
 251 #define PF_UNSPEC       AF_UNSPEC
 252 #define PF_LOCAL        AF_LOCAL
 253 #define PF_UNIX         PF_LOCAL        /* backward compatibility */
 254 #define PF_INET         AF_INET
 255 #define PF_IMPLINK      AF_IMPLINK
 256 #define PF_PUP          AF_PUP
 257 #define PF_CHAOS        AF_CHAOS
 258 #define PF_NS           AF_NS
 259 #define PF_ISO          AF_ISO
 260 #define PF_OSI          AF_ISO
 261 #define PF_ECMA         AF_ECMA
 262 #define PF_DATAKIT      AF_DATAKIT
 263 #define PF_CCITT        AF_CCITT
 264 #define PF_SNA          AF_SNA
 265 #define PF_DECnet       AF_DECnet
 266 #define PF_DLI          AF_DLI
 267 #define PF_LAT          AF_LAT
 268 #define PF_HYLINK       AF_HYLINK
 269 #define PF_APPLETALK    AF_APPLETALK
 270 #define PF_ROUTE        AF_ROUTE
 271 #define PF_LINK         AF_LINK
 272 #define PF_XTP          pseudo_AF_XTP   /* really just proto family, no AF */
 273 #define PF_COIP         AF_COIP
 274 #define PF_CNT          AF_CNT
 275 #define PF_SIP          AF_SIP
 276 #define PF_IPX          AF_IPX          /* same format as AF_NS */
 277 #define PF_RTIP         pseudo_AF_RTIP  /* same format as AF_INET */
 278 #define PF_PIP          pseudo_AF_PIP
 279 #ifdef __APPLE__
 280 #define PF_NDRV         AF_NDRV
 281 #endif
 282 #define PF_ISDN         AF_ISDN
 283 #define PF_KEY          pseudo_AF_KEY
 284 #define PF_INET6        AF_INET6
 285 #define PF_NATM         AF_NATM
 286 #ifdef __APPLE__
 287 #define PF_SYSTEM       AF_SYSTEM
 288 #define PF_NETBIOS      AF_NETBIOS
 289 #define PF_PPP          AF_PPP
 290 #else
 291 #define PF_ATM          AF_ATM
 292 #define PF_NETGRAPH     AF_NETGRAPH
 293 #endif
 294
 295 #define PF_MAX          AF_MAX
 296
 297 /*
 298  * Definitions for network related sysctl, CTL_NET.
 299  *
 300  * Second level is protocol family.
 301  * Third level is protocol number.
 302  *
 303  * Further levels are defined by the individual families below.
 304  */
 305 #define NET_MAXID       AF_MAX
 306
 307 #define CTL_NET_NAMES { \
 308         { 0, 0 }, \
 309         { "local", CTLTYPE_NODE }, \
 310         { "inet", CTLTYPE_NODE }, \
 311         { "implink", CTLTYPE_NODE }, \
 312         { "pup", CTLTYPE_NODE }, \
 313         { "chaos", CTLTYPE_NODE }, \
 314         { "xerox_ns", CTLTYPE_NODE }, \
 315         { "iso", CTLTYPE_NODE }, \
 316         { "emca", CTLTYPE_NODE }, \
 317         { "datakit", CTLTYPE_NODE }, \
 318         { "ccitt", CTLTYPE_NODE }, \
 319         { "ibm_sna", CTLTYPE_NODE }, \
 320         { "decnet", CTLTYPE_NODE }, \
 321         { "dec_dli", CTLTYPE_NODE }, \
 322         { "lat", CTLTYPE_NODE }, \
 323         { "hylink", CTLTYPE_NODE }, \
 324         { "appletalk", CTLTYPE_NODE }, \
 325         { "route", CTLTYPE_NODE }, \
 326         { "link_layer", CTLTYPE_NODE }, \
 327         { "xtp", CTLTYPE_NODE }, \
 328         { "coip", CTLTYPE_NODE }, \
 329         { "cnt", CTLTYPE_NODE }, \
 330         { "rtip", CTLTYPE_NODE }, \
 331         { "ipx", CTLTYPE_NODE }, \
 332         { "sip", CTLTYPE_NODE }, \
 333         { "pip", CTLTYPE_NODE }, \
 334         { 0, 0 }, \
 335         { "ndrv", CTLTYPE_NODE }, \
 336         { "isdn", CTLTYPE_NODE }, \
 337         { "key", CTLTYPE_NODE }, \
 338         { "inet6", CTLTYPE_NODE }, \
 339         { "natm", CTLTYPE_NODE }, \
 340         { "sys", CTLTYPE_NODE }, \
 341         { "netbios", CTLTYPE_NODE }, \
 342         { "ppp", CTLTYPE_NODE }, \
 343         { "hdrcomplete", CTLTYPE_NODE }, \
 344 }
 345
 346 /*
 347  * PF_ROUTE - Routing table
 348  *
 349  * Three additional levels are defined:
 350  *      Fourth: address family, 0 is wildcard
 351  *      Fifth: type of info, defined below
 352  *      Sixth: flag(s) to mask with for NET_RT_FLAGS
 353  */
 354 #define NET_RT_DUMP     1               /* dump; may limit to a.f. */
 355 #define NET_RT_FLAGS    2               /* by flags, e.g. RESOLVING */
 356 #define NET_RT_IFLIST   3               /* survey interface list */
 357 #define NET_RT_MAXID    4
 358
 359 #define CTL_NET_RT_NAMES { \
 360         { 0, 0 }, \
 361         { "dump", CTLTYPE_STRUCT }, \
 362         { "flags", CTLTYPE_STRUCT }, \
 363         { "iflist", CTLTYPE_STRUCT }, \
 364 }
 365
 366 /*
 367  * Maximum queue length specifiable by listen.
 368  */
 369 #define SOMAXCONN       128
 370
 371 /*
 372  * Message header for recvmsg and sendmsg calls.
 373  * Used value-result for recvmsg, value only for sendmsg.
 374  */
 375 struct msghdr {
 376         caddr_t         msg_name;               /* optional address */
 377         socklen_t       msg_namelen;            /* size of address */
 378         struct          iovec *msg_iov;         /* scatter/gather array */
 379         u_int           msg_iovlen;             /* # elements in msg_iov */
 380         caddr_t         msg_control;            /* ancillary data, see below */
 381         socklen_t       msg_controllen;         /* ancillary data buffer len */
 382         int             msg_flags;              /* flags on received message */
 383 };
 384
 385 #define MSG_OOB         0x1             /* process out-of-band data */
 386 #define MSG_PEEK        0x2             /* peek at incoming message */
 387 #define MSG_DONTROUTE   0x4             /* send without using routing tables */
 388 #define MSG_EOR         0x8             /* data completes record */
 389 #define MSG_TRUNC       0x10            /* data discarded before delivery */
 390 #define MSG_CTRUNC      0x20            /* control data lost before delivery */
 391 #define MSG_WAITALL     0x40            /* wait for full request or error */
 392 #define MSG_DONTWAIT    0x80            /* this message should be nonblocking */
 393 #define MSG_EOF         0x100           /* data completes connection */
 394 #ifdef __APPLE__
 395 #define MSG_WAITSTREAM  0x200           /* wait up to full request.. may return partial */
 396 #define MSG_FLUSH       0x400           /* Start of 'hold' seq; dump so_temp */
 397 #define MSG_HOLD        0x800           /* Hold frag in so_temp */
 398 #define MSG_SEND        0x1000          /* Send the packet in so_temp */
 399 #define MSG_HAVEMORE    0x2000          /* Data ready to be read */
 400 #define MSG_RCVMORE     0x4000          /* Data remains in current pkt */
 401 #endif
 402 #define MSG_COMPAT      0x8000          /* used in sendit() */
 403
 404 /*
 405  * Header for ancillary data objects in msg_control buffer.
 406  * Used for additional information with/about a datagram
 407  * not expressible by flags.  The format is a sequence
 408  * of message elements headed by cmsghdr structures.
 409  */
 410 struct cmsghdr {
 411         socklen_t       cmsg_len;               /* data byte count, including hdr */
 412         int             cmsg_level;             /* originating protocol */
 413         int             cmsg_type;              /* protocol-specific type */
 414 /* followed by  u_char  cmsg_data[]; */
 415 };
 416
 417 #ifndef __APPLE__
 418 /*
 419  * While we may have more groups than this, the cmsgcred struct must
 420  * be able to fit in an mbuf, and NGROUPS_MAX is too large to allow
 421  * this.
 422 */
 423 #define CMGROUP_MAX 16
 424
 425 /*
 426  * Credentials structure, used to verify the identity of a peer
 427  * process that has sent us a message. This is allocated by the
 428  * peer process but filled in by the kernel. This prevents the
 429  * peer from lying about its identity. (Note that cmcred_groups[0]
 430  * is the effective GID.)
 431  */
 432 struct cmsgcred {
 433         pid_t   cmcred_pid;             /* PID of sending process */
 434         uid_t   cmcred_uid;             /* real UID of sending process */
 435         uid_t   cmcred_euid;            /* effective UID of sending process */
 436         gid_t   cmcred_gid;             /* real GID of sending process */
 437         short   cmcred_ngroups;         /* number or groups */
 438         gid_t   cmcred_groups[CMGROUP_MAX];     /* groups */
 439 };
 440 #endif
 441
 442 /* given pointer to struct cmsghdr, return pointer to data */
 443 #define CMSG_DATA(cmsg)         ((u_char *)(cmsg) + \
 444                                  ALIGN(sizeof(struct cmsghdr)))
 445
 446 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
 447 #define CMSG_NXTHDR(mhdr, cmsg) \
 448         (((caddr_t)(cmsg) + ALIGN((cmsg)->cmsg_len) + \
 449           ALIGN(sizeof(struct cmsghdr)) > \
 450             (caddr_t)(mhdr)->msg_control + (mhdr)->msg_controllen) ? \
 451             (struct cmsghdr *)NULL : \
 452             (struct cmsghdr *)((caddr_t)(cmsg) + ALIGN((cmsg)->cmsg_len)))
 453
 454 #define CMSG_FIRSTHDR(mhdr)     ((struct cmsghdr *)(mhdr)->msg_control)
 455
 456 /* RFC 2292 additions */
 457
 458 #define CMSG_SPACE(l)           (ALIGN(sizeof(struct cmsghdr)) + ALIGN(l))
 459 #define CMSG_LEN(l)             (ALIGN(sizeof(struct cmsghdr)) + (l))
 460
 461 #ifdef KERNEL
 462 #define CMSG_ALIGN(n)   ALIGN(n)
 463 #endif
 464
 465 /* "Socket"-level control message types: */
 466 #define SCM_RIGHTS      0x01            /* access rights (array of int) */
 467 #define SCM_TIMESTAMP   0x02            /* timestamp (struct timeval) */
 468 #define SCM_CREDS       0x03            /* process creds (struct cmsgcred) */
 469
 470 /*
 471  * 4.3 compat sockaddr, move to compat file later
 472  */
 473 struct osockaddr {
 474         u_short sa_family;              /* address family */
 475         char    sa_data[14];            /* up to 14 bytes of direct address */
 476 };
 477
 478 /*
 479  * 4.3-compat message header (move to compat file later).
 480  */
 481 struct omsghdr {
 482         caddr_t msg_name;               /* optional address */
 483         int     msg_namelen;            /* size of address */
 484         struct  iovec *msg_iov;         /* scatter/gather array */
 485         int     msg_iovlen;             /* # elements in msg_iov */
 486         caddr_t msg_accrights;          /* access rights sent/received */
 487         int     msg_accrightslen;
 488 };
 489
 490 /*
 491  * howto arguments for shutdown(2), specified by Posix.1g.
 492  */
 493 #define SHUT_RD         0               /* shut down the reading side */
 494 #define SHUT_WR         1               /* shut down the writing side */
 495 #define SHUT_RDWR       2               /* shut down both sides */
 496
 497 #if SENDFILE
 498 /*
 499  * sendfile(2) header/trailer struct
 500  */
 501 struct sf_hdtr {
 502         struct iovec *headers;  /* pointer to an array of header struct iovec's */
 503         int hdr_cnt;            /* number of header iovec's */
 504         struct iovec *trailers; /* pointer to an array of trailer struct iovec's */
 505         int trl_cnt;            /* number of trailer iovec's */
 506 };
 507 #endif
 508
 509 #ifndef KERNEL
 510
 511 #include <sys/cdefs.h>
 512
 513 __BEGIN_DECLS
 514 int     accept __P((int, struct sockaddr *, socklen_t *));
 515 int     bind __P((int, const struct sockaddr *, socklen_t));
 516 int     connect __P((int, const struct sockaddr *, socklen_t));
 517 int     getpeername __P((int, struct sockaddr *, socklen_t *));
 518 int     getsockname __P((int, struct sockaddr *, socklen_t *));
 519 int     getsockopt __P((int, int, int, void *, int *));
 520 int     listen __P((int, int));
 521 ssize_t recv __P((int, void *, size_t, int));
 522 ssize_t recvfrom __P((int, void *, size_t, int, struct sockaddr *, socklen_t *));
 523 ssize_t recvmsg __P((int, struct msghdr *, int));
 524 ssize_t send __P((int, const void *, size_t, int));
 525 ssize_t sendto __P((int, const void *,
 526             size_t, int, const struct sockaddr *, socklen_t));
 527 ssize_t sendmsg __P((int, const struct msghdr *, int));
 528 #if SENDFILE
 529 int     sendfile __P((int, int, off_t, size_t, struct sf_hdtr *, off_t *, int));
 530 #endif
 531 int     setsockopt __P((int, int, int, const void *, socklen_t));
 532 int     shutdown __P((int, int));
 533 int     socket __P((int, int, int));
 534 int     socketpair __P((int, int, int, int *));
 535
 536 void    pfctlinput __P((int, struct sockaddr *));
 537 __END_DECLS
 538
 539 #endif /* !KERNEL */
 540
 541 #endif /* !_SYS_SOCKET_H_ */