bsd/sys/socket.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1998, 1999 Apple Computer, Inc. All Rights Reserved */
  23 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  24 /*
  25  * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by the University of
  39  *      California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  *
  56  *      @(#)socket.h    8.4 (Berkeley) 2/21/94
  57  * $FreeBSD: src/sys/sys/socket.h,v 1.39.2.7 2001/07/03 11:02:01 ume Exp $
  58  */
  59
  60 #ifndef _SYS_SOCKET_H_
  61 #define _SYS_SOCKET_H_
  62
  63 #ifndef __APPLE__
  64 #include <machine/ansi.h>
  65 #endif
  66 #define _NO_NAMESPACE_POLLUTION
  67 #include <machine/param.h>
  68 #undef _NO_NAMESPACE_POLLUTION
  69
  70 /*
  71  * Definitions related to sockets: types, address families, options.
  72  */
  73
  74 /*
  75  * Data types.
  76  */
  77 typedef u_char          sa_family_t;
  78 #ifdef  _BSD_SOCKLEN_T_
  79 typedef _BSD_SOCKLEN_T_ socklen_t;
  80 #undef  _BSD_SOCKLEN_T_
  81 #endif
  82
  83 /*
  84  * Types
  85  */
  86 #define SOCK_STREAM     1               /* stream socket */
  87 #define SOCK_DGRAM      2               /* datagram socket */
  88 #define SOCK_RAW        3               /* raw-protocol interface */
  89 #define SOCK_RDM        4               /* reliably-delivered message */
  90 #define SOCK_SEQPACKET  5               /* sequenced packet stream */
  91
  92 /*
  93  * Option flags per-socket.
  94  */
  95 #define SO_DEBUG        0x0001          /* turn on debugging info recording */
  96 #define SO_ACCEPTCONN   0x0002          /* socket has had listen() */
  97 #define SO_REUSEADDR    0x0004          /* allow local address reuse */
  98 #define SO_KEEPALIVE    0x0008          /* keep connections alive */
  99 #define SO_DONTROUTE    0x0010          /* just use interface addresses */
 100 #define SO_BROADCAST    0x0020          /* permit sending of broadcast msgs */
 101 #define SO_USELOOPBACK  0x0040          /* bypass hardware when possible */
 102 #define SO_LINGER       0x0080          /* linger on close if data present */
 103 #define SO_OOBINLINE    0x0100          /* leave received OOB data in line */
 104 #define SO_REUSEPORT    0x0200          /* allow local address & port reuse */
 105 #define SO_TIMESTAMP    0x0400          /* timestamp received dgram traffic */
 106 #ifndef __APPLE__
 107 #define SO_ACCEPTFILTER 0x1000          /* there is an accept filter */
 108 #else
 109 #define SO_DONTTRUNC    0x2000          /* APPLE: Retain unread data */
 110                                         /*  (ATOMIC proto) */
 111 #define SO_WANTMORE             0x4000          /* APPLE: Give hint when more data ready */
 112 #define SO_WANTOOBFLAG  0x8000          /* APPLE: Want OOB in MSG_FLAG on receive */
 113 #endif
 114
 115 /*
 116  * Additional options, not kept in so_options.
 117  */
 118 #define SO_SNDBUF       0x1001          /* send buffer size */
 119 #define SO_RCVBUF       0x1002          /* receive buffer size */
 120 #define SO_SNDLOWAT     0x1003          /* send low-water mark */
 121 #define SO_RCVLOWAT     0x1004          /* receive low-water mark */
 122 #define SO_SNDTIMEO     0x1005          /* send timeout */
 123 #define SO_RCVTIMEO     0x1006          /* receive timeout */
 124 #define SO_ERROR        0x1007          /* get error status and clear */
 125 #define SO_TYPE         0x1008          /* get socket type */
 126 /*efine SO_PRIVSTATE    0x1009             get/deny privileged state */
 127 #ifdef __APPLE__
 128 #define SO_NREAD        0x1020          /* APPLE: get 1st-packet byte count */
 129 #define SO_NKE          0x1021          /* APPLE: Install socket-level NKE */
 130 #define SO_NOSIGPIPE    0x1022          /* APPLE: No SIGPIPE on EPIPE */
 131 #endif
 132 /*
 133  * Structure used for manipulating linger option.
 134  */
 135 struct  linger {
 136         int     l_onoff;                /* option on/off */
 137         int     l_linger;               /* linger time */
 138 };
 139
 140 #ifndef __APPLE__
 141 struct  accept_filter_arg {
 142         char    af_name[16];
 143         char    af_arg[256-16];
 144 };
 145 #endif
 146
 147 /*
 148  * Level number for (get/set)sockopt() to apply to socket itself.
 149  */
 150 #define SOL_SOCKET      0xffff          /* options for socket level */
 151
 152 /*
 153  * Address families.
 154  */
 155 #define AF_UNSPEC       0               /* unspecified */
 156 #define AF_LOCAL        1               /* local to host (pipes) */
 157 #define AF_UNIX         AF_LOCAL        /* backward compatibility */
 158 #define AF_INET         2               /* internetwork: UDP, TCP, etc. */
 159 #define AF_IMPLINK      3               /* arpanet imp addresses */
 160 #define AF_PUP          4               /* pup protocols: e.g. BSP */
 161 #define AF_CHAOS        5               /* mit CHAOS protocols */
 162 #define AF_NS           6               /* XEROX NS protocols */
 163 #define AF_ISO          7               /* ISO protocols */
 164 #define AF_OSI          AF_ISO
 165 #define AF_ECMA         8               /* European computer manufacturers */
 166 #define AF_DATAKIT      9               /* datakit protocols */
 167 #define AF_CCITT        10              /* CCITT protocols, X.25 etc */
 168 #define AF_SNA          11              /* IBM SNA */
 169 #define AF_DECnet       12              /* DECnet */
 170 #define AF_DLI          13              /* DEC Direct data link interface */
 171 #define AF_LAT          14              /* LAT */
 172 #define AF_HYLINK       15              /* NSC Hyperchannel */
 173 #define AF_APPLETALK    16              /* Apple Talk */
 174 #define AF_ROUTE        17              /* Internal Routing Protocol */
 175 #define AF_LINK         18              /* Link layer interface */
 176 #define pseudo_AF_XTP   19              /* eXpress Transfer Protocol (no AF) */
 177 #define AF_COIP         20              /* connection-oriented IP, aka ST II */
 178 #define AF_CNT          21              /* Computer Network Technology */
 179 #define pseudo_AF_RTIP  22              /* Help Identify RTIP packets */
 180 #define AF_IPX          23              /* Novell Internet Protocol */
 181 #define AF_SIP          24              /* Simple Internet Protocol */
 182 #define pseudo_AF_PIP   25              /* Help Identify PIP packets */
 183 #ifdef __APPLE__
 184 /*define pseudo_AF_BLUE 26         Identify packets for Blue Box - Not used */
 185 #define AF_NDRV         27              /* Network Driver 'raw' access */
 186 #endif
 187 #define AF_ISDN         28              /* Integrated Services Digital Network*/
 188 #define AF_E164         AF_ISDN         /* CCITT E.164 recommendation */
 189 #define pseudo_AF_KEY   29              /* Internal key-management function */
 190 #define AF_INET6        30              /* IPv6 */
 191 #define AF_NATM         31              /* native ATM access */
 192 #ifdef __APPLE__
 193 #define AF_SYSTEM       32              /* Kernel event messages */
 194 #define AF_NETBIOS      33              /* NetBIOS */
 195 #define AF_PPP          34              /* PPP communication protocol */
 196 #else
 197 #define AF_ATM          30              /* ATM */
 198 #endif
 199 #define pseudo_AF_HDRCMPLT 35           /* Used by BPF to not rewrite headers
 200                                          * in interface output routine
 201                                          */
 202 #ifndef __APPLE__
 203 #define AF_NETGRAPH     32              /* Netgraph sockets */
 204 #endif
 205 #define AF_MAX          36
 206
 207 /*
 208  * Structure used by kernel to store most
 209  * addresses.
 210  */
 211 struct sockaddr {
 212         u_char  sa_len;                 /* total length */
 213         u_char  sa_family;              /* address family */
 214         char            sa_data[14];            /* actually longer; address value */
 215 };
 216 #define SOCK_MAXADDRLEN 255             /* longest possible addresses */
 217
 218 /*
 219  * Structure used by kernel to pass protocol
 220  * information in raw sockets.
 221  */
 222 struct sockproto {
 223         u_short sp_family;              /* address family */
 224         u_short sp_protocol;            /* protocol */
 225 };
 226
 227 /*
 228  * RFC 2553: protocol-independent placeholder for socket addresses
 229  */
 230 #define _SS_MAXSIZE     128
 231 #define _SS_ALIGNSIZE   (sizeof(int64_t))
 232 #define _SS_PAD1SIZE    (_SS_ALIGNSIZE - sizeof(u_char) - sizeof(sa_family_t))
 233 #define _SS_PAD2SIZE    (_SS_MAXSIZE - sizeof(u_char) - sizeof(sa_family_t) - \
 234                                 _SS_PAD1SIZE - _SS_ALIGNSIZE)
 235
 236 struct sockaddr_storage {
 237         u_char          ss_len;         /* address length */
 238         sa_family_t     ss_family;      /* address family */
 239         char                    __ss_pad1[_SS_PAD1SIZE];
 240         int64_t         __ss_align;     /* force desired structure storage alignment */
 241         char                    __ss_pad2[_SS_PAD2SIZE];
 242 };
 243
 244 /*
 245  * Protocol families, same as address families for now.
 246  */
 247 #define PF_UNSPEC       AF_UNSPEC
 248 #define PF_LOCAL        AF_LOCAL
 249 #define PF_UNIX         PF_LOCAL        /* backward compatibility */
 250 #define PF_INET         AF_INET
 251 #define PF_IMPLINK      AF_IMPLINK
 252 #define PF_PUP          AF_PUP
 253 #define PF_CHAOS        AF_CHAOS
 254 #define PF_NS           AF_NS
 255 #define PF_ISO          AF_ISO
 256 #define PF_OSI          AF_ISO
 257 #define PF_ECMA         AF_ECMA
 258 #define PF_DATAKIT      AF_DATAKIT
 259 #define PF_CCITT        AF_CCITT
 260 #define PF_SNA          AF_SNA
 261 #define PF_DECnet       AF_DECnet
 262 #define PF_DLI          AF_DLI
 263 #define PF_LAT          AF_LAT
 264 #define PF_HYLINK       AF_HYLINK
 265 #define PF_APPLETALK    AF_APPLETALK
 266 #define PF_ROUTE        AF_ROUTE
 267 #define PF_LINK         AF_LINK
 268 #define PF_XTP          pseudo_AF_XTP   /* really just proto family, no AF */
 269 #define PF_COIP         AF_COIP
 270 #define PF_CNT          AF_CNT
 271 #define PF_SIP          AF_SIP
 272 #define PF_IPX          AF_IPX          /* same format as AF_NS */
 273 #define PF_RTIP         pseudo_AF_RTIP  /* same format as AF_INET */
 274 #define PF_PIP          pseudo_AF_PIP
 275 #ifdef __APPLE__
 276 #define PF_NDRV         AF_NDRV
 277 #endif
 278 #define PF_ISDN         AF_ISDN
 279 #define PF_KEY          pseudo_AF_KEY
 280 #define PF_INET6        AF_INET6
 281 #define PF_NATM         AF_NATM
 282 #ifdef __APPLE__
 283 #define PF_SYSTEM       AF_SYSTEM
 284 #define PF_NETBIOS      AF_NETBIOS
 285 #define PF_PPP          AF_PPP
 286 #else
 287 #define PF_ATM          AF_ATM
 288 #define PF_NETGRAPH     AF_NETGRAPH
 289 #endif
 290
 291 #define PF_MAX          AF_MAX
 292
 293 /*
 294  * Definitions for network related sysctl, CTL_NET.
 295  *
 296  * Second level is protocol family.
 297  * Third level is protocol number.
 298  *
 299  * Further levels are defined by the individual families below.
 300  */
 301 #define NET_MAXID       AF_MAX
 302
 303 #define CTL_NET_NAMES { \
 304         { 0, 0 }, \
 305         { "local", CTLTYPE_NODE }, \
 306         { "inet", CTLTYPE_NODE }, \
 307         { "implink", CTLTYPE_NODE }, \
 308         { "pup", CTLTYPE_NODE }, \
 309         { "chaos", CTLTYPE_NODE }, \
 310         { "xerox_ns", CTLTYPE_NODE }, \
 311         { "iso", CTLTYPE_NODE }, \
 312         { "emca", CTLTYPE_NODE }, \
 313         { "datakit", CTLTYPE_NODE }, \
 314         { "ccitt", CTLTYPE_NODE }, \
 315         { "ibm_sna", CTLTYPE_NODE }, \
 316         { "decnet", CTLTYPE_NODE }, \
 317         { "dec_dli", CTLTYPE_NODE }, \
 318         { "lat", CTLTYPE_NODE }, \
 319         { "hylink", CTLTYPE_NODE }, \
 320         { "appletalk", CTLTYPE_NODE }, \
 321         { "route", CTLTYPE_NODE }, \
 322         { "link_layer", CTLTYPE_NODE }, \
 323         { "xtp", CTLTYPE_NODE }, \
 324         { "coip", CTLTYPE_NODE }, \
 325         { "cnt", CTLTYPE_NODE }, \
 326         { "rtip", CTLTYPE_NODE }, \
 327         { "ipx", CTLTYPE_NODE }, \
 328         { "sip", CTLTYPE_NODE }, \
 329         { "pip", CTLTYPE_NODE }, \
 330         { 0, 0 }, \
 331         { "ndrv", CTLTYPE_NODE }, \
 332         { "isdn", CTLTYPE_NODE }, \
 333         { "key", CTLTYPE_NODE }, \
 334         { "inet6", CTLTYPE_NODE }, \
 335         { "natm", CTLTYPE_NODE }, \
 336         { "sys", CTLTYPE_NODE }, \
 337         { "netbios", CTLTYPE_NODE }, \
 338         { "ppp", CTLTYPE_NODE }, \
 339         { "hdrcomplete", CTLTYPE_NODE }, \
 340 }
 341
 342 /*
 343  * PF_ROUTE - Routing table
 344  *
 345  * Three additional levels are defined:
 346  *      Fourth: address family, 0 is wildcard
 347  *      Fifth: type of info, defined below
 348  *      Sixth: flag(s) to mask with for NET_RT_FLAGS
 349  */
 350 #define NET_RT_DUMP     1               /* dump; may limit to a.f. */
 351 #define NET_RT_FLAGS    2               /* by flags, e.g. RESOLVING */
 352 #define NET_RT_IFLIST   3               /* survey interface list */
 353 #define NET_RT_MAXID    4
 354
 355 #define CTL_NET_RT_NAMES { \
 356         { 0, 0 }, \
 357         { "dump", CTLTYPE_STRUCT }, \
 358         { "flags", CTLTYPE_STRUCT }, \
 359         { "iflist", CTLTYPE_STRUCT }, \
 360 }
 361
 362 /*
 363  * Maximum queue length specifiable by listen.
 364  */
 365 #define SOMAXCONN       128
 366
 367 /*
 368  * Message header for recvmsg and sendmsg calls.
 369  * Used value-result for recvmsg, value only for sendmsg.
 370  */
 371 struct msghdr {
 372         caddr_t msg_name;               /* optional address */
 373         u_int   msg_namelen;            /* size of address */
 374         struct  iovec *msg_iov;         /* scatter/gather array */
 375         u_int   msg_iovlen;             /* # elements in msg_iov */
 376         caddr_t msg_control;            /* ancillary data, see below */
 377         u_int   msg_controllen;         /* ancillary data buffer len */
 378         int     msg_flags;              /* flags on received message */
 379 };
 380
 381 #define MSG_OOB         0x1             /* process out-of-band data */
 382 #define MSG_PEEK        0x2             /* peek at incoming message */
 383 #define MSG_DONTROUTE   0x4             /* send without using routing tables */
 384 #define MSG_EOR         0x8             /* data completes record */
 385 #define MSG_TRUNC       0x10            /* data discarded before delivery */
 386 #define MSG_CTRUNC      0x20            /* control data lost before delivery */
 387 #define MSG_WAITALL     0x40            /* wait for full request or error */
 388 #define MSG_DONTWAIT    0x80            /* this message should be nonblocking */
 389 #define MSG_EOF         0x100           /* data completes connection */
 390 #ifdef __APPLE__
 391 #define MSG_FLUSH       0x400           /* Start of 'hold' seq; dump so_temp */
 392 #define MSG_HOLD        0x800           /* Hold frag in so_temp */
 393 #define MSG_SEND        0x1000          /* Send the packet in so_temp */
 394 #define MSG_HAVEMORE    0x2000          /* Data ready to be read */
 395 #define MSG_RCVMORE     0x4000          /* Data remains in current pkt */
 396 #endif
 397 #define MSG_COMPAT      0x8000          /* used in sendit() */
 398
 399 /*
 400  * Header for ancillary data objects in msg_control buffer.
 401  * Used for additional information with/about a datagram
 402  * not expressible by flags.  The format is a sequence
 403  * of message elements headed by cmsghdr structures.
 404  */
 405 struct cmsghdr {
 406         u_int   cmsg_len;               /* data byte count, including hdr */
 407         int     cmsg_level;             /* originating protocol */
 408         int     cmsg_type;              /* protocol-specific type */
 409 /* followed by  u_char  cmsg_data[]; */
 410 };
 411
 412 #ifndef __APPLE__
 413 /*
 414  * While we may have more groups than this, the cmsgcred struct must
 415  * be able to fit in an mbuf, and NGROUPS_MAX is too large to allow
 416  * this.
 417 */
 418 #define CMGROUP_MAX 16
 419
 420 /*
 421  * Credentials structure, used to verify the identity of a peer
 422  * process that has sent us a message. This is allocated by the
 423  * peer process but filled in by the kernel. This prevents the
 424  * peer from lying about its identity. (Note that cmcred_groups[0]
 425  * is the effective GID.)
 426  */
 427 struct cmsgcred {
 428         pid_t   cmcred_pid;             /* PID of sending process */
 429         uid_t   cmcred_uid;             /* real UID of sending process */
 430         uid_t   cmcred_euid;            /* effective UID of sending process */
 431         gid_t   cmcred_gid;             /* real GID of sending process */
 432         short   cmcred_ngroups;         /* number or groups */
 433         gid_t   cmcred_groups[CMGROUP_MAX];     /* groups */
 434 };
 435 #endif
 436
 437 /* given pointer to struct cmsghdr, return pointer to data */
 438 #define CMSG_DATA(cmsg)         ((u_char *)(cmsg) + \
 439                                  ALIGN(sizeof(struct cmsghdr)))
 440
 441 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
 442 #define CMSG_NXTHDR(mhdr, cmsg) \
 443         (((caddr_t)(cmsg) + ALIGN((cmsg)->cmsg_len) + \
 444           ALIGN(sizeof(struct cmsghdr)) > \
 445             (caddr_t)(mhdr)->msg_control + (mhdr)->msg_controllen) ? \
 446             (struct cmsghdr *)NULL : \
 447             (struct cmsghdr *)((caddr_t)(cmsg) + ALIGN((cmsg)->cmsg_len)))
 448
 449 #define CMSG_FIRSTHDR(mhdr)     ((struct cmsghdr *)(mhdr)->msg_control)
 450
 451 /* RFC 2292 additions */
 452
 453 #define CMSG_SPACE(l)           (ALIGN(sizeof(struct cmsghdr)) + ALIGN(l))
 454 #define CMSG_LEN(l)             (ALIGN(sizeof(struct cmsghdr)) + (l))
 455
 456 #ifdef KERNEL
 457 #define CMSG_ALIGN(n)   ALIGN(n)
 458 #endif
 459
 460 /* "Socket"-level control message types: */
 461 #define SCM_RIGHTS      0x01            /* access rights (array of int) */
 462 #define SCM_TIMESTAMP   0x02            /* timestamp (struct timeval) */
 463 #define SCM_CREDS       0x03            /* process creds (struct cmsgcred) */
 464
 465 /*
 466  * 4.3 compat sockaddr, move to compat file later
 467  */
 468 struct osockaddr {
 469         u_short sa_family;              /* address family */
 470         char    sa_data[14];            /* up to 14 bytes of direct address */
 471 };
 472
 473 /*
 474  * 4.3-compat message header (move to compat file later).
 475  */
 476 struct omsghdr {
 477         caddr_t msg_name;               /* optional address */
 478         int     msg_namelen;            /* size of address */
 479         struct  iovec *msg_iov;         /* scatter/gather array */
 480         int     msg_iovlen;             /* # elements in msg_iov */
 481         caddr_t msg_accrights;          /* access rights sent/received */
 482         int     msg_accrightslen;
 483 };
 484
 485 /*
 486  * howto arguments for shutdown(2), specified by Posix.1g.
 487  */
 488 #define SHUT_RD         0               /* shut down the reading side */
 489 #define SHUT_WR         1               /* shut down the writing side */
 490 #define SHUT_RDWR       2               /* shut down both sides */
 491
 492 #if SENDFILE
 493 /*
 494  * sendfile(2) header/trailer struct
 495  */
 496 struct sf_hdtr {
 497         struct iovec *headers;  /* pointer to an array of header struct iovec's */
 498         int hdr_cnt;            /* number of header iovec's */
 499         struct iovec *trailers; /* pointer to an array of trailer struct iovec's */
 500         int trl_cnt;            /* number of trailer iovec's */
 501 };
 502 #endif
 503
 504 #ifndef KERNEL
 505
 506 #include <sys/cdefs.h>
 507
 508 __BEGIN_DECLS
 509 int     accept __P((int, struct sockaddr *, int *));
 510 int     bind __P((int, const struct sockaddr *, int));
 511 int     connect __P((int, const struct sockaddr *, int));
 512 int     getpeername __P((int, struct sockaddr *, int *));
 513 int     getsockname __P((int, struct sockaddr *, int *));
 514 int     getsockopt __P((int, int, int, void *, int *));
 515 int     listen __P((int, int));
 516 ssize_t recv __P((int, void *, size_t, int));
 517 ssize_t recvfrom __P((int, void *, size_t, int, struct sockaddr *, int *));
 518 ssize_t recvmsg __P((int, struct msghdr *, int));
 519 ssize_t send __P((int, const void *, size_t, int));
 520 ssize_t sendto __P((int, const void *,
 521             size_t, int, const struct sockaddr *, int));
 522 ssize_t sendmsg __P((int, const struct msghdr *, int));
 523 #if SENDFILE
 524 int     sendfile __P((int, int, off_t, size_t, struct sf_hdtr *, off_t *, int));
 525 #endif
 526 int     setsockopt __P((int, int, int, const void *, int));
 527 int     shutdown __P((int, int));
 528 int     socket __P((int, int, int));
 529 int     socketpair __P((int, int, int, int *));
 530
 531 void    pfctlinput __P((int, struct sockaddr *));
 532 __END_DECLS
 533
 534 #endif /* !KERNEL */
 535
 536 #endif /* !_SYS_SOCKET_H_ */