bsd/sys/socket.h

   1 /*
   2  * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1998, 1999 Apple Computer, Inc. All Rights Reserved */
  29 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  30 /*
  31  * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
  32  *      The Regents of the University of California.  All rights reserved.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  * 3. All advertising materials mentioning features or use of this software
  43  *    must display the following acknowledgement:
  44  *      This product includes software developed by the University of
  45  *      California, Berkeley and its contributors.
  46  * 4. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  *
  62  *      @(#)socket.h    8.4 (Berkeley) 2/21/94
  63  * $FreeBSD: src/sys/sys/socket.h,v 1.39.2.7 2001/07/03 11:02:01 ume Exp $
  64  */
  65 /*
  66  * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
  67  * support for mandatory and extensible security protections.  This notice
  68  * is included in support of clause 2.2 (b) of the Apple Public License,
  69  * Version 2.0.
  70  */
  71
  72 #ifndef _SYS_SOCKET_H_
  73 #define _SYS_SOCKET_H_
  74
  75 #include <sys/types.h>
  76 #include <sys/cdefs.h>
  77 #include <machine/_param.h>
  78
  79 #ifdef PRIVATE
  80 #include <sys/param.h>
  81 #endif /* PRIVATE */
  82
  83 #ifndef KERNEL
  84 #include <Availability.h>
  85 #endif
  86
  87 /*
  88  * Definitions related to sockets: types, address families, options.
  89  */
  90
  91 /*
  92  * Data types.
  93  */
  94 #ifndef _GID_T
  95 typedef __darwin_gid_t          gid_t;
  96 #define _GID_T
  97 #endif
  98
  99 #ifndef _OFF_T
 100 typedef __darwin_off_t          off_t;
 101 #define _OFF_T
 102 #endif
 103
 104 #ifndef _PID_T
 105 typedef __darwin_pid_t          pid_t;
 106 #define _PID_T
 107 #endif
 108
 109 #ifndef _SA_FAMILY_T
 110 #define _SA_FAMILY_T
 111 typedef __uint8_t               sa_family_t;
 112 #endif
 113
 114 #ifndef _SOCKLEN_T
 115 #define _SOCKLEN_T
 116 typedef __darwin_socklen_t      socklen_t;
 117 #endif
 118
 119 /* XXX Not explicitly defined by POSIX, but function return types are */
 120 #ifndef _SIZE_T
 121 #define _SIZE_T
 122 typedef __darwin_size_t         size_t;
 123 #endif
 124
 125 /* XXX Not explicitly defined by POSIX, but function return types are */
 126 #ifndef _SSIZE_T
 127 #define _SSIZE_T
 128 typedef __darwin_ssize_t        ssize_t;
 129 #endif
 130
 131 /*
 132  * [XSI] The iovec structure shall be defined as described in <sys/uio.h>.
 133  */
 134 #ifndef _STRUCT_IOVEC
 135 #define _STRUCT_IOVEC
 136 struct iovec {
 137         void *   iov_base;      /* [XSI] Base address of I/O memory region */
 138         size_t   iov_len;       /* [XSI] Size of region iov_base points to */
 139 };
 140 #endif
 141
 142 #ifdef PRIVATE
 143 #define SO_TCDBG_PID            0x01    /* Set/get traffic class for PID */
 144 #define SO_TCDBG_PNAME          0x02    /* Set/get traffic class for processes of that name */
 145 #define SO_TCDBG_PURGE          0x04    /* Purge entries for unused PIDs */
 146 #define SO_TCDBG_FLUSH          0x08    /* Flush all entries */
 147 #define SO_TCDBG_COUNT          0x10    /* Get count of entries */
 148 #define SO_TCDBG_LIST           0x20    /* List entries */
 149 #define SO_TCDBG_DELETE         0x40    /* Delete a process entry */
 150 #define SO_TCDBG_TCFLUSH_PID    0x80    /* Flush traffic class for PID */
 151
 152 struct so_tcdbg {
 153         u_int32_t       so_tcdbg_cmd;
 154         int32_t         so_tcdbg_tclass;
 155         u_int32_t       so_tcdbg_count;
 156         pid_t           so_tcdbg_pid;
 157         char            so_tcdbg_pname[MAXCOMLEN + 1];
 158         int32_t         so_tcdbg_opportunistic; /* -1: unspecified, 0: off, 1: on, other: errors */
 159 };
 160 #endif /* PRIVATE */
 161
 162 /*
 163  * Types
 164  */
 165 #define SOCK_STREAM     1               /* stream socket */
 166 #define SOCK_DGRAM      2               /* datagram socket */
 167 #define SOCK_RAW        3               /* raw-protocol interface */
 168 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 169 #define SOCK_RDM        4               /* reliably-delivered message */
 170 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 171 #define SOCK_SEQPACKET  5               /* sequenced packet stream */
 172
 173 /*
 174  * Option flags per-socket.
 175  */
 176 #define SO_DEBUG        0x0001          /* turn on debugging info recording */
 177 #define SO_ACCEPTCONN   0x0002          /* socket has had listen() */
 178 #define SO_REUSEADDR    0x0004          /* allow local address reuse */
 179 #define SO_KEEPALIVE    0x0008          /* keep connections alive */
 180 #define SO_DONTROUTE    0x0010          /* just use interface addresses */
 181 #define SO_BROADCAST    0x0020          /* permit sending of broadcast msgs */
 182 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 183 #define SO_USELOOPBACK  0x0040          /* bypass hardware when possible */
 184 #define SO_LINGER       0x0080          /* linger on close if data present (in ticks) */
 185 #else
 186 #define SO_LINGER       0x1080          /* linger on close if data present (in seconds) */
 187 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 188 #define SO_OOBINLINE    0x0100          /* leave received OOB data in line */
 189 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 190 #define SO_REUSEPORT    0x0200          /* allow local address & port reuse */
 191 #define SO_TIMESTAMP    0x0400          /* timestamp received dgram traffic */
 192 #define SO_TIMESTAMP_MONOTONIC  0x0800  /* Monotonically increasing timestamp on rcvd dgram */
 193 #ifndef __APPLE__
 194 #define SO_ACCEPTFILTER 0x1000          /* there is an accept filter */
 195 #else
 196 #define SO_DONTTRUNC    0x2000          /* APPLE: Retain unread data */
 197                                         /*  (ATOMIC proto) */
 198 #define SO_WANTMORE     0x4000          /* APPLE: Give hint when more data ready */
 199 #define SO_WANTOOBFLAG  0x8000          /* APPLE: Want OOB in MSG_FLAG on receive */
 200
 201 #endif  /* (!__APPLE__) */
 202 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 203
 204 /*
 205  * Additional options, not kept in so_options.
 206  */
 207 #define SO_SNDBUF       0x1001          /* send buffer size */
 208 #define SO_RCVBUF       0x1002          /* receive buffer size */
 209 #define SO_SNDLOWAT     0x1003          /* send low-water mark */
 210 #define SO_RCVLOWAT     0x1004          /* receive low-water mark */
 211 #define SO_SNDTIMEO     0x1005          /* send timeout */
 212 #define SO_RCVTIMEO     0x1006          /* receive timeout */
 213 #define SO_ERROR        0x1007          /* get error status and clear */
 214 #define SO_TYPE         0x1008          /* get socket type */
 215 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 216 /*efine SO_PRIVSTATE    0x1009             get/deny privileged state */
 217 #define SO_LABEL        0x1010          /* socket's MAC label */
 218 #define SO_PEERLABEL    0x1011          /* socket's peer MAC label */
 219 #ifdef __APPLE__
 220 #define SO_NREAD        0x1020          /* APPLE: get 1st-packet byte count */
 221 #define SO_NKE          0x1021          /* APPLE: Install socket-level NKE */
 222 #define SO_NOSIGPIPE    0x1022          /* APPLE: No SIGPIPE on EPIPE */
 223 #define SO_NOADDRERR    0x1023          /* APPLE: Returns EADDRNOTAVAIL when src is not available anymore */
 224 #define SO_NWRITE       0x1024          /* APPLE: Get number of bytes currently in send socket buffer */
 225 #define SO_REUSESHAREUID        0x1025          /* APPLE: Allow reuse of port/socket by different userids */
 226 #ifdef __APPLE_API_PRIVATE
 227 #define SO_NOTIFYCONFLICT       0x1026  /* APPLE: send notification if there is a bind on a port which is already in use */
 228 #define SO_UPCALLCLOSEWAIT      0x1027  /* APPLE: block on close until an upcall returns */
 229 #endif
 230 #define SO_LINGER_SEC   0x1080          /* linger on close if data present (in seconds) */
 231 #define SO_RESTRICTIONS 0x1081  /* APPLE: deny inbound/outbound/both/flag set */
 232 #define SO_RESTRICT_DENYIN              0x00000001      /* flag for SO_RESTRICTIONS - deny inbound */
 233 #define SO_RESTRICT_DENYOUT             0x00000002      /* flag for SO_RESTRICTIONS - deny outbound */
 234 #define SO_RESTRICT_DENYSET             0x80000000      /* flag for SO_RESTRICTIONS - deny has been set */
 235 #define SO_RANDOMPORT   0x1082  /* APPLE: request local port randomization */
 236 #define SO_NP_EXTENSIONS        0x1083  /* To turn off some POSIX behavior */
 237 #endif
 238
 239 #ifdef PRIVATE
 240 #define SO_EXECPATH     0x1085          /* Application Firewall Socket option */
 241 /*
 242  * Traffic service class definitions (lowest to highest):
 243  *
 244  * SO_TC_BK_SYS
 245  *      "Background System-Initiated", high delay tolerant, high loss
 246  *      tolerant, elastic flow, variable size & long-lived.  E.g: system-
 247  *      initiated iCloud synching or Time Capsule backup, for which there
 248  *      is no progress feedbacks.
 249  *
 250  * SO_TC_BK
 251  *      "Background", user-initiated, high delay tolerant, high loss tolerant,
 252  *      elastic flow, variable size.  E.g. user-initiated iCloud synching or
 253  *      Time Capsule backup; or traffics of background applications, for which
 254  *      there is some progress feedbacks.
 255  *
 256  * SO_TC_BE
 257  *      "Best Effort", unclassified/standard.  This is the default service
 258  *      class; pretty much a mix of everything.
 259  *
 260  * SO_TC_RD
 261  *      "Responsive Data", a notch higher than "Best Effort", medium delay
 262  *      tolerant, elastic & inelastic flow, bursty, long-lived.  E.g. email,
 263  *      instant messaging, for which there is a sense of interactivity and
 264  *      urgency (user waiting for output).
 265  *
 266  * SO_TC_OAM
 267  *      "Operations, Administration, and Management", medium delay tolerant,
 268  *      low-medium loss tolerant, elastic & inelastic flows, variable size.
 269  *      E.g. VPN tunnels.
 270  *
 271  * SO_TC_AV
 272  *      "Multimedia Audio/Video Streaming", medium delay tolerant, low-medium
 273  *      loss tolerant, elastic flow, constant packet interval, variable rate &
 274  *      size.  E.g. AirPlay playback (both video and audio).
 275  *
 276  * SO_TC_RV
 277  *      "Responsive Multimedia Audio/Video", low delay tolerant, low-medium
 278  *      loss tolerant, elastic flow, variable packet interval, rate and size.
 279  *      E.g. AirPlay mirroring, screen sharing.
 280  *
 281  * SO_TC_VI
 282  *      "Interactive Video", low delay tolerant, low-medium loss tolerant,
 283  *      elastic flow, constant packet interval, variable rate & size.  E.g.
 284  *      FaceTime video.
 285  *
 286  * SO_TC_VO
 287  *      "Interactive Voice", low delay tolerant, low loss tolerant, inelastic
 288  *      flow, constant packet rate, somewhat fixed size.  E.g. VoIP including
 289  *      FaceTime audio.
 290  *
 291  * SO_TC_CTL
 292  *      "Network Control", low delay tolerant, low loss tolerant, inelastic
 293  *      flow, rate is bursty but short, variable size.  E.g. DNS queries;
 294  *      certain types of locally-originated ICMP, ICMPv6; IGMP/MLD join/leave,
 295  *      ARP.
 296  */
 297 #define SO_TRAFFIC_CLASS        0x1086  /* Traffic service class (int) */
 298 #define  SO_TC_BK_SYS   100             /* lowest class */
 299 #define  SO_TC_BK       200
 300 #define  SO_TC_BE       0
 301 #define  SO_TC_RD       300
 302 #define  SO_TC_OAM      400
 303 #define  SO_TC_AV       500
 304 #define  SO_TC_RV       600
 305 #define  SO_TC_VI       700
 306 #define  SO_TC_VO       800
 307 #define  SO_TC_CTL      900             /* highest class */
 308 #define  SO_TC_MAX      10              /* Total # of traffic classes */
 309 #ifdef XNU_KERNEL_PRIVATE
 310 #define  _SO_TC_BK      1               /* deprecated */
 311 #define  _SO_TC_VI      2               /* deprecated */
 312 #define  _SO_TC_VO      3               /* deprecated */
 313 #define  _SO_TC_MAX     4               /* deprecated */
 314
 315 #define SO_VALID_TC(c)                                                  \
 316         (c == SO_TC_BK_SYS || c == SO_TC_BK || c == SO_TC_BE ||         \
 317         c == SO_TC_RD || c == SO_TC_OAM || c == SO_TC_AV ||             \
 318         c == SO_TC_RV || c == SO_TC_VI || c == SO_TC_VO || c == SO_TC_CTL)
 319 #endif /* XNU_KERNEL_PRIVATE */
 320
 321 /* Background socket configuration flags */
 322 #define TRAFFIC_MGT_SO_BACKGROUND       0x0001  /* background socket */
 323 #define TRAFFIC_MGT_TCP_RECVBG          0x0002  /* Only TCP sockets, receiver throttling */
 324
 325 #define SO_RECV_TRAFFIC_CLASS   0x1087          /* Receive traffic class (bool)*/
 326 #define SO_TRAFFIC_CLASS_DBG    0x1088          /* Debug traffic class (struct so_tcdbg) */
 327 #define SO_TRAFFIC_CLASS_STATS  0x1089          /* Traffic class statistics */
 328 #define SO_PRIVILEGED_TRAFFIC_CLASS 0x1090      /* Privileged traffic class (bool) */
 329 #define SO_DEFUNCTOK    0x1100          /* can be defunct'd */
 330 #define SO_ISDEFUNCT    0x1101          /* get defunct status */
 331
 332 #define SO_OPPORTUNISTIC        0x1102  /* deprecated; use SO_TRAFFIC_CLASS */
 333
 334 /*
 335  * SO_FLUSH flushes any unsent data generated by a given socket.  It takes
 336  * an integer parameter, which can be any of the SO_TC traffic class values,
 337  * or the special SO_TC_ALL value.
 338  */
 339 #define SO_FLUSH        0x1103          /* flush unsent data (int) */
 340 #define  SO_TC_ALL      (-1)
 341
 342 #define SO_RECV_ANYIF   0x1104          /* unrestricted inbound processing */
 343 #endif /* PRIVATE */
 344 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 345
 346 /*
 347  * Structure used for manipulating linger option.
 348  */
 349 struct  linger {
 350         int     l_onoff;                /* option on/off */
 351         int     l_linger;               /* linger time */
 352 };
 353
 354 #ifndef __APPLE__
 355 struct  accept_filter_arg {
 356         char    af_name[16];
 357         char    af_arg[256-16];
 358 };
 359 #endif
 360
 361 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 362 #ifdef __APPLE__
 363
 364 /*
 365  * Structure to control non-portable Sockets extension to POSIX
 366  */
 367 struct so_np_extensions {
 368         u_int32_t       npx_flags;
 369         u_int32_t       npx_mask;
 370 };
 371
 372 #define SONPX_SETOPTSHUT        0x000000001     /* flag for allowing setsockopt after shutdown */
 373
 374
 375 #ifdef KERNEL_PRIVATE
 376 #define SONPX_MASK_VALID                (SONPX_SETOPTSHUT)
 377 #define IS_SO_TC_BACKGROUND(_tc_) ((_tc_) == SO_TC_BK || (_tc_) == SO_TC_BK_SYS)
 378 #endif /* KERNEL_PRIVATE */
 379
 380 #endif
 381 #endif
 382
 383 /*
 384  * Level number for (get/set)sockopt() to apply to socket itself.
 385  */
 386 #define SOL_SOCKET      0xffff          /* options for socket level */
 387
 388
 389 /*
 390  * Address families.
 391  */
 392 #define AF_UNSPEC       0               /* unspecified */
 393 #define AF_UNIX         1               /* local to host (pipes) */
 394 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 395 #define AF_LOCAL        AF_UNIX         /* backward compatibility */
 396 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 397 #define AF_INET         2               /* internetwork: UDP, TCP, etc. */
 398 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 399 #define AF_IMPLINK      3               /* arpanet imp addresses */
 400 #define AF_PUP          4               /* pup protocols: e.g. BSP */
 401 #define AF_CHAOS        5               /* mit CHAOS protocols */
 402 #define AF_NS           6               /* XEROX NS protocols */
 403 #define AF_ISO          7               /* ISO protocols */
 404 #define AF_OSI          AF_ISO
 405 #define AF_ECMA         8               /* European computer manufacturers */
 406 #define AF_DATAKIT      9               /* datakit protocols */
 407 #define AF_CCITT        10              /* CCITT protocols, X.25 etc */
 408 #define AF_SNA          11              /* IBM SNA */
 409 #define AF_DECnet       12              /* DECnet */
 410 #define AF_DLI          13              /* DEC Direct data link interface */
 411 #define AF_LAT          14              /* LAT */
 412 #define AF_HYLINK       15              /* NSC Hyperchannel */
 413 #define AF_APPLETALK    16              /* Apple Talk */
 414 #define AF_ROUTE        17              /* Internal Routing Protocol */
 415 #define AF_LINK         18              /* Link layer interface */
 416 #define pseudo_AF_XTP   19              /* eXpress Transfer Protocol (no AF) */
 417 #define AF_COIP         20              /* connection-oriented IP, aka ST II */
 418 #define AF_CNT          21              /* Computer Network Technology */
 419 #define pseudo_AF_RTIP  22              /* Help Identify RTIP packets */
 420 #define AF_IPX          23              /* Novell Internet Protocol */
 421 #define AF_SIP          24              /* Simple Internet Protocol */
 422 #define pseudo_AF_PIP   25              /* Help Identify PIP packets */
 423 #ifdef __APPLE__
 424 /*define pseudo_AF_BLUE 26         Identify packets for Blue Box - Not used */
 425 #define AF_NDRV         27              /* Network Driver 'raw' access */
 426 #endif
 427 #define AF_ISDN         28              /* Integrated Services Digital Network*/
 428 #define AF_E164         AF_ISDN         /* CCITT E.164 recommendation */
 429 #define pseudo_AF_KEY   29              /* Internal key-management function */
 430 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 431 #define AF_INET6        30              /* IPv6 */
 432 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 433 #define AF_NATM         31              /* native ATM access */
 434 #ifdef __APPLE__
 435 #define AF_SYSTEM       32              /* Kernel event messages */
 436 #define AF_NETBIOS      33              /* NetBIOS */
 437 #define AF_PPP          34              /* PPP communication protocol */
 438 #else
 439 #define AF_ATM          30              /* ATM */
 440 #endif
 441 #define pseudo_AF_HDRCMPLT 35           /* Used by BPF to not rewrite headers
 442                                          * in interface output routine
 443                                          */
 444 #ifdef PRIVATE
 445 #define AF_AFP  36                      /* Used by AFP */
 446 #else
 447 #define AF_RESERVED_36  36              /* Reserved for internal usage */
 448 #endif
 449
 450 #ifndef __APPLE__
 451 #define AF_NETGRAPH     32              /* Netgraph sockets */
 452 #endif
 453 #define AF_IEEE80211    37              /* IEEE 802.11 protocol */
 454 #ifdef __APPLE__
 455 #define AF_UTUN         38
 456 #endif
 457 #define AF_MAX          39
 458 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 459
 460 /*
 461  * [XSI] Structure used by kernel to store most addresses.
 462  */
 463 struct sockaddr {
 464         __uint8_t       sa_len;         /* total length */
 465         sa_family_t     sa_family;      /* [XSI] address family */
 466         char            sa_data[14];    /* [XSI] addr value (actually larger) */
 467 };
 468
 469 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 470 #define SOCK_MAXADDRLEN 255             /* longest possible addresses */
 471
 472 /*
 473  * Structure used by kernel to pass protocol
 474  * information in raw sockets.
 475  */
 476 struct sockproto {
 477         __uint16_t      sp_family;              /* address family */
 478         __uint16_t      sp_protocol;            /* protocol */
 479 };
 480 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE)*/
 481
 482 /*
 483  * RFC 2553: protocol-independent placeholder for socket addresses
 484  */
 485 #define _SS_MAXSIZE     128
 486 #define _SS_ALIGNSIZE   (sizeof(__int64_t))
 487 #define _SS_PAD1SIZE    \
 488                 (_SS_ALIGNSIZE - sizeof(__uint8_t) - sizeof(sa_family_t))
 489 #define _SS_PAD2SIZE    \
 490                 (_SS_MAXSIZE - sizeof(__uint8_t) - sizeof(sa_family_t) - \
 491                                 _SS_PAD1SIZE - _SS_ALIGNSIZE)
 492
 493 /*
 494  * [XSI] sockaddr_storage
 495  */
 496 struct sockaddr_storage {
 497         __uint8_t       ss_len;         /* address length */
 498         sa_family_t     ss_family;      /* [XSI] address family */
 499         char                    __ss_pad1[_SS_PAD1SIZE];
 500         __int64_t       __ss_align;     /* force structure storage alignment */
 501         char                    __ss_pad2[_SS_PAD2SIZE];
 502 };
 503
 504 /*
 505  * Protocol families, same as address families for now.
 506  */
 507 #define PF_UNSPEC       AF_UNSPEC
 508 #define PF_LOCAL        AF_LOCAL
 509 #define PF_UNIX         PF_LOCAL        /* backward compatibility */
 510 #define PF_INET         AF_INET
 511 #define PF_IMPLINK      AF_IMPLINK
 512 #define PF_PUP          AF_PUP
 513 #define PF_CHAOS        AF_CHAOS
 514 #define PF_NS           AF_NS
 515 #define PF_ISO          AF_ISO
 516 #define PF_OSI          AF_ISO
 517 #define PF_ECMA         AF_ECMA
 518 #define PF_DATAKIT      AF_DATAKIT
 519 #define PF_CCITT        AF_CCITT
 520 #define PF_SNA          AF_SNA
 521 #define PF_DECnet       AF_DECnet
 522 #define PF_DLI          AF_DLI
 523 #define PF_LAT          AF_LAT
 524 #define PF_HYLINK       AF_HYLINK
 525 #define PF_APPLETALK    AF_APPLETALK
 526 #define PF_ROUTE        AF_ROUTE
 527 #define PF_LINK         AF_LINK
 528 #define PF_XTP          pseudo_AF_XTP   /* really just proto family, no AF */
 529 #define PF_COIP         AF_COIP
 530 #define PF_CNT          AF_CNT
 531 #define PF_SIP          AF_SIP
 532 #define PF_IPX          AF_IPX          /* same format as AF_NS */
 533 #define PF_RTIP         pseudo_AF_RTIP  /* same format as AF_INET */
 534 #define PF_PIP          pseudo_AF_PIP
 535 #ifdef __APPLE__
 536 #define PF_NDRV         AF_NDRV
 537 #endif
 538 #define PF_ISDN         AF_ISDN
 539 #define PF_KEY          pseudo_AF_KEY
 540 #define PF_INET6        AF_INET6
 541 #define PF_NATM         AF_NATM
 542 #ifdef __APPLE__
 543 #define PF_SYSTEM       AF_SYSTEM
 544 #define PF_NETBIOS      AF_NETBIOS
 545 #define PF_PPP          AF_PPP
 546 #ifdef PRIVATE
 547 #define PF_AFP          AF_AFP
 548 #else
 549 #define PF_RESERVED_36  AF_RESERVED_36
 550 #endif
 551
 552 #else
 553 #define PF_ATM          AF_ATM
 554 #define PF_NETGRAPH     AF_NETGRAPH
 555 #endif
 556
 557 #ifdef __APPLE__
 558 #define PF_UTUN         AF_UTUN
 559 #endif
 560 #define PF_MAX          AF_MAX
 561
 562 /*
 563  * These do not have socket-layer support:
 564  */
 565 #define PF_VLAN         ((uint32_t)0x766c616e)  /* 'vlan' */
 566 #define PF_BOND         ((uint32_t)0x626f6e64)  /* 'bond' */
 567 #ifdef KERNEL_PRIVATE
 568 #define PF_BRIDGE       ((uint32_t)0x62726467)  /* 'brdg' */
 569 #endif /* KERNEL_PRIVATE */
 570
 571 /*
 572  * Definitions for network related sysctl, CTL_NET.
 573  *
 574  * Second level is protocol family.
 575  * Third level is protocol number.
 576  *
 577  * Further levels are defined by the individual families below.
 578  */
 579 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 580 #define NET_MAXID       AF_MAX
 581 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 582
 583 #ifdef KERNEL_PRIVATE
 584 #define CTL_NET_NAMES { \
 585         { 0, 0 }, \
 586         { "local", CTLTYPE_NODE }, \
 587         { "inet", CTLTYPE_NODE }, \
 588         { "implink", CTLTYPE_NODE }, \
 589         { "pup", CTLTYPE_NODE }, \
 590         { "chaos", CTLTYPE_NODE }, \
 591         { "xerox_ns", CTLTYPE_NODE }, \
 592         { "iso", CTLTYPE_NODE }, \
 593         { "emca", CTLTYPE_NODE }, \
 594         { "datakit", CTLTYPE_NODE }, \
 595         { "ccitt", CTLTYPE_NODE }, \
 596         { "ibm_sna", CTLTYPE_NODE }, \
 597         { "decnet", CTLTYPE_NODE }, \
 598         { "dec_dli", CTLTYPE_NODE }, \
 599         { "lat", CTLTYPE_NODE }, \
 600         { "hylink", CTLTYPE_NODE }, \
 601         { "appletalk", CTLTYPE_NODE }, \
 602         { "route", CTLTYPE_NODE }, \
 603         { "link_layer", CTLTYPE_NODE }, \
 604         { "xtp", CTLTYPE_NODE }, \
 605         { "coip", CTLTYPE_NODE }, \
 606         { "cnt", CTLTYPE_NODE }, \
 607         { "rtip", CTLTYPE_NODE }, \
 608         { "ipx", CTLTYPE_NODE }, \
 609         { "sip", CTLTYPE_NODE }, \
 610         { "pip", CTLTYPE_NODE }, \
 611         { 0, 0 }, \
 612         { "ndrv", CTLTYPE_NODE }, \
 613         { "isdn", CTLTYPE_NODE }, \
 614         { "key", CTLTYPE_NODE }, \
 615         { "inet6", CTLTYPE_NODE }, \
 616         { "natm", CTLTYPE_NODE }, \
 617         { "sys", CTLTYPE_NODE }, \
 618         { "netbios", CTLTYPE_NODE }, \
 619         { "ppp", CTLTYPE_NODE }, \
 620         { "hdrcomplete", CTLTYPE_NODE }, \
 621 }
 622 #endif /* KERNEL_PRIVATE */
 623
 624 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 625 /*
 626  * PF_ROUTE - Routing table
 627  *
 628  * Three additional levels are defined:
 629  *      Fourth: address family, 0 is wildcard
 630  *      Fifth: type of info, defined below
 631  *      Sixth: flag(s) to mask with for NET_RT_FLAGS
 632  */
 633 #define NET_RT_DUMP             1       /* dump; may limit to a.f. */
 634 #define NET_RT_FLAGS            2       /* by flags, e.g. RESOLVING */
 635 #define NET_RT_IFLIST           3       /* survey interface list */
 636 #define NET_RT_STAT             4       /* routing statistics */
 637 #define NET_RT_TRASH            5       /* routes not in table but not freed */
 638 #define NET_RT_IFLIST2          6       /* interface list with addresses */
 639 #define NET_RT_DUMP2            7       /* dump; may limit to a.f. */
 640 #ifdef PRIVATE
 641 #define NET_RT_DUMPX            8       /* private */
 642 #define NET_RT_DUMPX_FLAGS      9       /* private */
 643 #endif /* PRIVATE */
 644 #define NET_RT_MAXID            10
 645 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
 646
 647 #ifdef KERNEL_PRIVATE
 648 #define CTL_NET_RT_NAMES { \
 649         { 0, 0 }, \
 650         { "dump", CTLTYPE_STRUCT }, \
 651         { "flags", CTLTYPE_STRUCT }, \
 652         { "iflist", CTLTYPE_STRUCT }, \
 653         { "stat", CTLTYPE_STRUCT }, \
 654         { "trash", CTLTYPE_INT }, \
 655         { "iflist2", CTLTYPE_STRUCT }, \
 656         { "dump2", CTLTYPE_STRUCT }, \
 657         { "dumpx", CTLTYPE_STRUCT }, \
 658         { "dumpx_flags", CTLTYPE_STRUCT }, \
 659 }
 660
 661 #endif /* KERNEL_PRIVATE */
 662
 663 /*
 664  * Maximum queue length specifiable by listen.
 665  */
 666 #define SOMAXCONN       128
 667
 668 /*
 669  * [XSI] Message header for recvmsg and sendmsg calls.
 670  * Used value-result for recvmsg, value only for sendmsg.
 671  */
 672 struct msghdr {
 673         void            *msg_name;      /* [XSI] optional address */
 674         socklen_t       msg_namelen;    /* [XSI] size of address */
 675         struct          iovec *msg_iov; /* [XSI] scatter/gather array */
 676         int             msg_iovlen;     /* [XSI] # elements in msg_iov */
 677         void            *msg_control;   /* [XSI] ancillary data, see below */
 678         socklen_t       msg_controllen; /* [XSI] ancillary data buffer len */
 679         int             msg_flags;      /* [XSI] flags on received message */
 680 };
 681
 682 #ifdef KERNEL
 683 /*
 684  * In-kernel representation of "struct msghdr" from
 685  * userspace. Has enough precision for 32-bit or
 686  * 64-bit clients, but does not need to be packed.
 687  */
 688
 689 struct user_msghdr {
 690         user_addr_t     msg_name;               /* optional address */
 691         socklen_t       msg_namelen;            /* size of address */
 692         user_addr_t     msg_iov;                /* scatter/gather array */
 693         int             msg_iovlen;             /* # elements in msg_iov */
 694         user_addr_t     msg_control;            /* ancillary data, see below */
 695         socklen_t       msg_controllen;         /* ancillary data buffer len */
 696         int             msg_flags;              /* flags on received message */
 697 };
 698
 699 /*
 700  * LP64 user version of struct msghdr.
 701  * WARNING - keep in sync with struct msghdr
 702  */
 703
 704 struct user64_msghdr {
 705         user64_addr_t   msg_name;               /* optional address */
 706         socklen_t       msg_namelen;            /* size of address */
 707         user64_addr_t   msg_iov;                /* scatter/gather array */
 708         int             msg_iovlen;             /* # elements in msg_iov */
 709         user64_addr_t   msg_control;            /* ancillary data, see below */
 710         socklen_t       msg_controllen;         /* ancillary data buffer len */
 711         int             msg_flags;              /* flags on received message */
 712 };
 713
 714 /*
 715  * ILP32 user version of struct msghdr.
 716  * WARNING - keep in sync with struct msghdr
 717  */
 718
 719 struct user32_msghdr {
 720         user32_addr_t   msg_name;       /* optional address */
 721         socklen_t       msg_namelen;    /* size of address */
 722         user32_addr_t   msg_iov;        /* scatter/gather array */
 723         int             msg_iovlen;     /* # elements in msg_iov */
 724         user32_addr_t   msg_control;    /* ancillary data, see below */
 725         socklen_t       msg_controllen; /* ancillary data buffer len */
 726         int             msg_flags;      /* flags on received message */
 727 };
 728
 729 #endif // KERNEL
 730
 731 #define MSG_OOB         0x1             /* process out-of-band data */
 732 #define MSG_PEEK        0x2             /* peek at incoming message */
 733 #define MSG_DONTROUTE   0x4             /* send without using routing tables */
 734 #define MSG_EOR         0x8             /* data completes record */
 735 #define MSG_TRUNC       0x10            /* data discarded before delivery */
 736 #define MSG_CTRUNC      0x20            /* control data lost before delivery */
 737 #define MSG_WAITALL     0x40            /* wait for full request or error */
 738 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 739 #define MSG_DONTWAIT    0x80            /* this message should be nonblocking */
 740 #define MSG_EOF         0x100           /* data completes connection */
 741 #ifdef __APPLE__
 742 #ifndef PRIVATE
 743 #ifdef __APPLE_API_OBSOLETE
 744 #define MSG_WAITSTREAM  0x200           /* wait up to full request.. may return partial */
 745 #endif
 746 #else
 747 #define MSG_WAITSTREAM  0x200           /* wait up to full request.. may return partial */
 748 #endif
 749 #define MSG_FLUSH       0x400           /* Start of 'hold' seq; dump so_temp */
 750 #define MSG_HOLD        0x800           /* Hold frag in so_temp */
 751 #define MSG_SEND        0x1000          /* Send the packet in so_temp */
 752 #define MSG_HAVEMORE    0x2000          /* Data ready to be read */
 753 #define MSG_RCVMORE     0x4000          /* Data remains in current pkt */
 754 #endif
 755 #ifdef KERNEL_PRIVATE
 756 #define MSG_COMPAT      0x8000          /* deprecated */
 757 #endif /* KERNEL_PRIVATE */
 758 #define MSG_NEEDSA      0x10000         /* Fail receive if socket address cannot be allocated */
 759 #ifdef KERNEL_PRIVATE
 760 #define MSG_NBIO        0x20000         /* FIONBIO mode, used by fifofs */
 761 #endif
 762 #ifdef  KERNEL
 763 #define MSG_USEUPCALL   0x80000000 /* Inherit upcall in sock_accept */
 764 #endif
 765 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 766
 767 /*
 768  * Header for ancillary data objects in msg_control buffer.
 769  * Used for additional information with/about a datagram
 770  * not expressible by flags.  The format is a sequence
 771  * of message elements headed by cmsghdr structures.
 772  */
 773 struct cmsghdr {
 774         socklen_t       cmsg_len;       /* [XSI] data byte count, including hdr */
 775         int             cmsg_level;     /* [XSI] originating protocol */
 776         int             cmsg_type;      /* [XSI] protocol-specific type */
 777 /* followed by  unsigned char  cmsg_data[]; */
 778 };
 779
 780 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 781 #ifndef __APPLE__
 782 /*
 783  * While we may have more groups than this, the cmsgcred struct must
 784  * be able to fit in an mbuf, and NGROUPS_MAX is too large to allow
 785  * this.
 786 */
 787 #define CMGROUP_MAX 16
 788
 789 /*
 790  * Credentials structure, used to verify the identity of a peer
 791  * process that has sent us a message. This is allocated by the
 792  * peer process but filled in by the kernel. This prevents the
 793  * peer from lying about its identity. (Note that cmcred_groups[0]
 794  * is the effective GID.)
 795  */
 796 struct cmsgcred {
 797         pid_t   cmcred_pid;             /* PID of sending process */
 798         uid_t   cmcred_uid;             /* real UID of sending process */
 799         uid_t   cmcred_euid;            /* effective UID of sending process */
 800         gid_t   cmcred_gid;             /* real GID of sending process */
 801         short   cmcred_ngroups;         /* number or groups */
 802         gid_t   cmcred_groups[CMGROUP_MAX];     /* groups */
 803 };
 804 #endif
 805 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 806
 807 /* given pointer to struct cmsghdr, return pointer to data */
 808 #define CMSG_DATA(cmsg)         ((unsigned char *)(cmsg) + \
 809                                  __DARWIN_ALIGN32(sizeof(struct cmsghdr)))
 810
 811 /*
 812  * RFC 2292 requires to check msg_controllen, in case that the kernel returns
 813  * an empty list for some reasons.
 814  */
 815 #define CMSG_FIRSTHDR(mhdr) \
 816         ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
 817          (struct cmsghdr *)(mhdr)->msg_control : \
 818          (struct cmsghdr *)0L)
 819
 820
 821 /*
 822  * Given pointer to struct cmsghdr, return pointer to next cmsghdr
 823  * RFC 2292 says that CMSG_NXTHDR(mhdr, NULL) is equivalent to CMSG_FIRSTHDR(mhdr)
 824  */
 825 #define CMSG_NXTHDR(mhdr, cmsg)                                         \
 826         ((char *)(cmsg) == (char *)0L ? CMSG_FIRSTHDR(mhdr) :           \
 827          ((((unsigned char *)(cmsg) +                                   \
 828             __DARWIN_ALIGN32((__uint32_t)(cmsg)->cmsg_len) +            \
 829             __DARWIN_ALIGN32(sizeof(struct cmsghdr))) >                 \
 830             ((unsigned char *)(mhdr)->msg_control +                     \
 831              (mhdr)->msg_controllen)) ?                                 \
 832           (struct cmsghdr *)0L /* NULL */ :                             \
 833           (struct cmsghdr *)(void *)((unsigned char *)(cmsg) +          \
 834                             __DARWIN_ALIGN32((__uint32_t)(cmsg)->cmsg_len))))
 835
 836 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 837 /* RFC 2292 additions */
 838 #define CMSG_SPACE(l)           (__DARWIN_ALIGN32(sizeof(struct cmsghdr)) + __DARWIN_ALIGN32(l))
 839 #define CMSG_LEN(l)             (__DARWIN_ALIGN32(sizeof(struct cmsghdr)) + (l))
 840
 841 #ifdef KERNEL
 842 #define CMSG_ALIGN(n)   __DARWIN_ALIGN32(n)
 843 #endif
 844 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 845
 846 /* "Socket"-level control message types: */
 847 #define SCM_RIGHTS                      0x01    /* access rights (array of int) */
 848 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 849 #define SCM_TIMESTAMP                   0x02    /* timestamp (struct timeval) */
 850 #define SCM_CREDS                       0x03    /* process creds (struct cmsgcred) */
 851 #define SCM_TIMESTAMP_MONOTONIC         0x04    /* timestamp (uint64_t) */
 852
 853 #ifdef KERNEL_PRIVATE
 854 /*
 855  * 4.3 compat sockaddr (deprecated)
 856  */
 857 struct osockaddr {
 858         __uint16_t      sa_family;      /* address family */
 859         char    sa_data[14];            /* up to 14 bytes of direct address */
 860 };
 861
 862 /*
 863  * 4.3-compat message header (deprecated)
 864  */
 865 struct omsghdr {
 866         void            *msg_name;              /* optional address */
 867         socklen_t       msg_namelen;            /* size of address */
 868         struct  iovec   *msg_iov;               /* scatter/gather array */
 869         int             msg_iovlen;             /* # elements in msg_iov */
 870         void            *msg_accrights;         /* access rights sent/rcvd */
 871         int             msg_accrightslen;
 872 };
 873
 874 #define SA(s)   ((struct sockaddr *)(void *)(s))
 875 #endif /* KERNEL_PRIVATE */
 876 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 877
 878 /*
 879  * howto arguments for shutdown(2), specified by Posix.1g.
 880  */
 881 #define SHUT_RD         0               /* shut down the reading side */
 882 #define SHUT_WR         1               /* shut down the writing side */
 883 #define SHUT_RDWR       2               /* shut down both sides */
 884
 885 #if !defined(_POSIX_C_SOURCE)
 886 /*
 887  * sendfile(2) header/trailer struct
 888  */
 889 struct sf_hdtr {
 890         struct iovec *headers;  /* pointer to an array of header struct iovec's */
 891         int hdr_cnt;            /* number of header iovec's */
 892         struct iovec *trailers; /* pointer to an array of trailer struct iovec's */
 893         int trl_cnt;            /* number of trailer iovec's */
 894 };
 895
 896 #ifdef KERNEL
 897
 898 /* In-kernel representation */
 899 struct user_sf_hdtr {
 900         user_addr_t headers;    /* pointer to an array of header struct iovec's */
 901         int hdr_cnt;            /* number of header iovec's */
 902         user_addr_t trailers;   /* pointer to an array of trailer struct iovec's */
 903         int trl_cnt;            /* number of trailer iovec's */
 904 };
 905
 906 /* LP64 user version of struct sf_hdtr */
 907 struct user64_sf_hdtr {
 908         user64_addr_t headers;  /* pointer to an array of header struct iovec's */
 909         int hdr_cnt;            /* number of header iovec's */
 910         user64_addr_t trailers; /* pointer to an array of trailer struct iovec's */
 911         int trl_cnt;            /* number of trailer iovec's */
 912 };
 913
 914 /* ILP32 user version of struct sf_hdtr */
 915 struct user32_sf_hdtr {
 916         user32_addr_t headers;  /* pointer to an array of header struct iovec's */
 917         int hdr_cnt;            /* number of header iovec's */
 918         user32_addr_t trailers; /* pointer to an array of trailer struct iovec's */
 919         int trl_cnt;            /* number of trailer iovec's */
 920 };
 921
 922 #endif /* KERNEL */
 923
 924 #endif  /* !_POSIX_C_SOURCE */
 925
 926 #ifndef KERNEL
 927 __BEGIN_DECLS
 928 int     accept(int, struct sockaddr * __restrict, socklen_t * __restrict)
 929                 __DARWIN_ALIAS_C(accept);
 930 int     bind(int, const struct sockaddr *, socklen_t) __DARWIN_ALIAS(bind);
 931 int     connect(int, const struct sockaddr *, socklen_t) __DARWIN_ALIAS_C( connect);
 932 int     getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict)
 933                 __DARWIN_ALIAS(getpeername);
 934 int     getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict)
 935                 __DARWIN_ALIAS(getsockname);
 936 int     getsockopt(int, int, int, void * __restrict, socklen_t * __restrict);
 937 int     listen(int, int) __DARWIN_ALIAS(listen);
 938 ssize_t recv(int, void *, size_t, int) __DARWIN_ALIAS_C(recv);
 939 ssize_t recvfrom(int, void *, size_t, int, struct sockaddr * __restrict,
 940                 socklen_t * __restrict) __DARWIN_ALIAS_C(recvfrom);
 941 ssize_t recvmsg(int, struct msghdr *, int) __DARWIN_ALIAS_C(recvmsg);
 942 ssize_t send(int, const void *, size_t, int) __DARWIN_ALIAS_C(send);
 943 ssize_t sendmsg(int, const struct msghdr *, int) __DARWIN_ALIAS_C(sendmsg);
 944 ssize_t sendto(int, const void *, size_t,
 945                 int, const struct sockaddr *, socklen_t) __DARWIN_ALIAS_C(sendto);
 946 int     setsockopt(int, int, int, const void *, socklen_t);
 947 int     shutdown(int, int);
 948 int     sockatmark(int) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
 949 int     socket(int, int, int);
 950 int     socketpair(int, int, int, int *) __DARWIN_ALIAS(socketpair);
 951
 952 #if !defined(_POSIX_C_SOURCE)
 953 int     sendfile(int, int, off_t, off_t *, struct sf_hdtr *, int);
 954 #endif  /* !_POSIX_C_SOURCE */
 955
 956 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 957 void    pfctlinput(int, struct sockaddr *);
 958 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 959 __END_DECLS
 960 #endif /* !KERNEL */
 961
 962 #ifdef KERNEL
 963 #include <sys/kpi_socket.h>
 964 #endif
 965
 966 #endif /* !_SYS_SOCKET_H_ */