StdLib/Include/sys/socket.h

   1 /*  $NetBSD: socket.h,v 1.82 2006/06/27 03:49:08 mrg Exp $  */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
  34  *  The Regents of the University of California.  All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  *  @(#)socket.h  8.6 (Berkeley) 5/3/95
  61  */
  62
  63 #ifndef _SYS_SOCKET_H_
  64 #define _SYS_SOCKET_H_
  65
  66 #include <sys/featuretest.h>
  67
  68 /*
  69  * Definitions related to sockets: types, address families, options.
  70  */
  71
  72 /*
  73  * Data types.
  74  */
  75 #include <sys/ansi.h>
  76
  77 #ifndef sa_family_t
  78 typedef __sa_family_t sa_family_t;
  79 #define sa_family_t __sa_family_t
  80 #endif
  81
  82 #ifndef socklen_t
  83 typedef __socklen_t socklen_t;
  84 #define socklen_t __socklen_t
  85 #endif
  86
  87 #include <machine/ansi.h>
  88
  89 #ifdef  _EFI_SIZE_T_
  90 typedef _EFI_SIZE_T_  size_t;
  91 #undef  _EFI_SIZE_T_
  92 #undef  _BSD_SIZE_T_
  93 #endif
  94
  95 #ifdef  _BSD_SSIZE_T_
  96 typedef _BSD_SSIZE_T_ ssize_t;
  97 #undef  _BSD_SSIZE_T_
  98 #endif
  99
 100 #include <sys/uio.h>
 101
 102 /*
 103  * Socket types.
 104  */
 105 #define SOCK_STREAM 1   /* stream socket */
 106 #define SOCK_DGRAM  2   /* datagram socket */
 107 #define SOCK_RAW  3   /* raw-protocol interface */
 108 #define SOCK_RDM  4   /* reliably-delivered message */
 109 #define SOCK_SEQPACKET  5   /* sequenced packet stream */
 110
 111 /*
 112  * Option flags per-socket.
 113  */
 114 #define SO_DEBUG  0x0001    /* turn on debugging info recording */
 115 #define SO_ACCEPTCONN 0x0002    /* socket has had listen() */
 116 #define SO_REUSEADDR  0x0004    /* allow local address reuse */
 117 #define SO_KEEPALIVE  0x0008    /* keep connections alive */
 118 #define SO_DONTROUTE  0x0010    /* just use interface addresses */
 119 #define SO_BROADCAST  0x0020    /* permit sending of broadcast msgs */
 120 #define SO_USELOOPBACK  0x0040    /* bypass hardware when possible */
 121 #define SO_LINGER 0x0080    /* linger on close if data present */
 122 #define SO_OOBINLINE  0x0100    /* leave received OOB data in line */
 123 #define SO_REUSEPORT  0x0200    /* allow local address & port reuse */
 124 #define SO_TIMESTAMP  0x0400    /* timestamp received dgram traffic */
 125
 126
 127 /*
 128  * Additional options, not kept in so_options.
 129  */
 130 #define SO_SNDBUF 0x1001    /* send buffer size */
 131 #define SO_RCVBUF 0x1002    /* receive buffer size */
 132 #define SO_SNDLOWAT 0x1003    /* send low-water mark */
 133 #define SO_RCVLOWAT 0x1004    /* receive low-water mark */
 134 #define SO_SNDTIMEO 0x1005    /* send timeout */
 135 #define SO_RCVTIMEO 0x1006    /* receive timeout */
 136 #define SO_ERROR  0x1007    /* get error status and clear */
 137 #define SO_TYPE   0x1008    /* get socket type */
 138 #define SO_OVERFLOWED 0x1009    /* datagrams: return packets dropped */
 139
 140 /*
 141  * Structure used for manipulating linger option.
 142  */
 143 struct  linger {
 144   int l_onoff;    /* option on/off */
 145   int l_linger;   /* linger time in seconds */
 146 };
 147
 148 /*
 149  * Level number for (get/set)sockopt() to apply to socket itself.
 150  */
 151 #define SOL_SOCKET  0xffff    /* options for socket level */
 152
 153 /*
 154  * Address families.
 155  */
 156 #define AF_UNSPEC 0   /* unspecified */
 157 #define AF_LOCAL  1   /* local to host (pipes, portals) */
 158 #define AF_UNIX   AF_LOCAL  /* backward compatibility */
 159 #define AF_INET   2   /* internetwork: UDP, TCP, etc. */
 160 #define AF_IMPLINK  3   /* arpanet imp addresses */
 161 #define AF_PUP    4   /* pup protocols: e.g. BSP */
 162 #define AF_CHAOS  5   /* mit CHAOS protocols */
 163 #define AF_NS   6   /* XEROX NS protocols */
 164 #define AF_ISO    7   /* ISO protocols */
 165 #define AF_OSI    AF_ISO
 166 #define AF_ECMA   8   /* european computer manufacturers */
 167 #define AF_DATAKIT  9   /* datakit protocols */
 168 #define AF_CCITT  10    /* CCITT protocols, X.25 etc */
 169 #define AF_SNA    11    /* IBM SNA */
 170 #define AF_DECnet 12    /* DECnet */
 171 #define AF_DLI    13    /* DEC Direct data link interface */
 172 #define AF_LAT    14    /* LAT */
 173 #define AF_HYLINK 15    /* NSC Hyperchannel */
 174 #define AF_APPLETALK  16    /* Apple Talk */
 175 #define AF_ROUTE  17    /* Internal Routing Protocol */
 176 #define AF_LINK   18    /* Link layer interface */
 177 #if defined(_NETBSD_SOURCE)
 178 #define pseudo_AF_XTP 19    /* eXpress Transfer Protocol (no AF) */
 179 #endif
 180 #define AF_COIP   20    /* connection-oriented IP, aka ST II */
 181 #define AF_CNT    21    /* Computer Network Technology */
 182 #if defined(_NETBSD_SOURCE)
 183 #define pseudo_AF_RTIP  22    /* Help Identify RTIP packets */
 184 #endif
 185 #define AF_IPX    23    /* Novell Internet Protocol */
 186 #define AF_INET6  24    /* IP version 6 */
 187 #if defined(_NETBSD_SOURCE)
 188 #define pseudo_AF_PIP 25    /* Help Identify PIP packets */
 189 #endif
 190 #define AF_ISDN   26    /* Integrated Services Digital Network*/
 191 #define AF_E164   AF_ISDN   /* CCITT E.164 recommendation */
 192 #define AF_NATM   27    /* native ATM access */
 193 #define AF_ARP    28    /* (rev.) addr. res. prot. (RFC 826) */
 194 #if defined(_NETBSD_SOURCE)
 195 #define pseudo_AF_KEY 29    /* Internal key management protocol  */
 196 #define pseudo_AF_HDRCMPLT 30   /* Used by BPF to not rewrite hdrs
 197              in interface output routine */
 198 #endif
 199 #define AF_BLUETOOTH  31
 200
 201 #define AF_MAX    32
 202
 203 /*
 204  * Structure used by kernel to store most
 205  * addresses.
 206  */
 207 struct sockaddr {
 208   __uint8_t sa_len;   /* total length */
 209   sa_family_t sa_family;  /* address family */
 210   char    sa_data[14];  /* actually longer; address value */
 211 };
 212
 213 #if defined(_KERNEL)
 214 /*
 215  * Structure used by kernel to pass protocol
 216  * information in raw sockets.
 217  */
 218 struct sockproto {
 219   u_short sp_family;    /* address family */
 220   u_short sp_protocol;    /* protocol */
 221 };
 222 #endif /* _KERNEL */
 223
 224 #if 1
 225 /*
 226  * RFC 2553: protocol-independent placeholder for socket addresses
 227  */
 228 #define _SS_MAXSIZE 128
 229 #define _SS_ALIGNSIZE (sizeof(__int64_t))
 230 #define _SS_PAD1SIZE  (_SS_ALIGNSIZE - 2)
 231 #define _SS_PAD2SIZE  (_SS_MAXSIZE - 2 - \
 232         _SS_PAD1SIZE - _SS_ALIGNSIZE)
 233
 234 #if (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
 235 struct sockaddr_storage {
 236   __uint8_t ss_len;   /* address length */
 237   sa_family_t ss_family;  /* address family */
 238   char    __ss_pad1[_SS_PAD1SIZE];
 239   __int64_t     __ss_align;/* force desired structure storage alignment */
 240   char    __ss_pad2[_SS_PAD2SIZE];
 241 };
 242 #endif /* _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
 243 #endif /* 1 */
 244
 245 /*
 246  * Protocol families, same as address families for now.
 247  */
 248 #define PF_UNSPEC AF_UNSPEC
 249 #define PF_LOCAL  AF_LOCAL
 250 #define PF_UNIX   PF_LOCAL  /* backward compatibility */
 251 #define PF_INET   AF_INET
 252 #define PF_IMPLINK  AF_IMPLINK
 253 #define PF_PUP    AF_PUP
 254 #define PF_CHAOS  AF_CHAOS
 255 #define PF_NS   AF_NS
 256 #define PF_ISO    AF_ISO
 257 #define PF_OSI    AF_ISO
 258 #define PF_ECMA   AF_ECMA
 259 #define PF_DATAKIT  AF_DATAKIT
 260 #define PF_CCITT  AF_CCITT
 261 #define PF_SNA    AF_SNA
 262 #define PF_DECnet AF_DECnet
 263 #define PF_DLI    AF_DLI
 264 #define PF_LAT    AF_LAT
 265 #define PF_HYLINK AF_HYLINK
 266 #define PF_APPLETALK  AF_APPLETALK
 267 #define PF_ROUTE  AF_ROUTE
 268 #define PF_LINK   AF_LINK
 269 #if defined(_NETBSD_SOURCE)
 270 #define PF_XTP    pseudo_AF_XTP /* really just proto family, no AF */
 271 #endif
 272 #define PF_COIP   AF_COIP
 273 #define PF_CNT    AF_CNT
 274 #define PF_INET6  AF_INET6
 275 #define PF_IPX    AF_IPX    /* same format as AF_NS */
 276 #if defined(_NETBSD_SOURCE)
 277 #define PF_RTIP   pseudo_AF_RTIP  /* same format as AF_INET */
 278 #define PF_PIP    pseudo_AF_PIP
 279 #endif
 280 #define PF_ISDN   AF_ISDN   /* same as E164 */
 281 #define PF_E164   AF_E164
 282 #define PF_NATM   AF_NATM
 283 #define PF_ARP    AF_ARP
 284 #if defined(_NETBSD_SOURCE)
 285 #define PF_KEY    pseudo_AF_KEY /* like PF_ROUTE, only for key mgmt */
 286 #endif
 287 #define PF_BLUETOOTH  AF_BLUETOOTH
 288
 289 #define PF_MAX    AF_MAX
 290
 291 #if defined(_NETBSD_SOURCE)
 292
 293 #ifndef gid_t
 294 typedef __gid_t   gid_t;    /* group id */
 295 #define gid_t   __gid_t
 296 #endif
 297
 298 #ifndef uid_t
 299 typedef __uid_t   uid_t;    /* user id */
 300 #define uid_t   __uid_t
 301 #endif
 302
 303 /*
 304  * Socket credentials.
 305  */
 306 struct sockcred {
 307   uid_t sc_uid;     /* real user id */
 308   uid_t sc_euid;    /* effective user id */
 309   gid_t sc_gid;     /* real group id */
 310   gid_t sc_egid;    /* effective group id */
 311   int sc_ngroups;   /* number of supplemental groups */
 312   gid_t sc_groups[1];   /* variable length */
 313 };
 314
 315 /*
 316  * Compute size of a sockcred structure with groups.
 317  */
 318 #define SOCKCREDSIZE(ngrps) \
 319   (sizeof(struct sockcred) + (sizeof(gid_t) * ((ngrps) - 1)))
 320 #endif /* _NETBSD_SOURCE */
 321
 322
 323 #if defined(_NETBSD_SOURCE)
 324 /*
 325  * Definitions for network related sysctl, CTL_NET.
 326  *
 327  * Second level is protocol family.
 328  * Third level is protocol number.
 329  *
 330  * Further levels are defined by the individual families below.
 331  */
 332 #define NET_MAXID AF_MAX
 333
 334 #define CTL_NET_NAMES { \
 335   { 0, 0 }, \
 336   { "local", CTLTYPE_NODE }, \
 337   { "inet", CTLTYPE_NODE }, \
 338   { "implink", CTLTYPE_NODE }, \
 339   { "pup", CTLTYPE_NODE }, \
 340   { "chaos", CTLTYPE_NODE }, \
 341   { "xerox_ns", CTLTYPE_NODE }, \
 342   { "iso", CTLTYPE_NODE }, \
 343   { "emca", CTLTYPE_NODE }, \
 344   { "datakit", CTLTYPE_NODE }, \
 345   { "ccitt", CTLTYPE_NODE }, \
 346   { "ibm_sna", CTLTYPE_NODE }, \
 347   { "decnet", CTLTYPE_NODE }, \
 348   { "dec_dli", CTLTYPE_NODE }, \
 349   { "lat", CTLTYPE_NODE }, \
 350   { "hylink", CTLTYPE_NODE }, \
 351   { "appletalk", CTLTYPE_NODE }, \
 352   { "route", CTLTYPE_NODE }, \
 353   { "link_layer", CTLTYPE_NODE }, \
 354   { "xtp", CTLTYPE_NODE }, \
 355   { "coip", CTLTYPE_NODE }, \
 356   { "cnt", CTLTYPE_NODE }, \
 357   { "rtip", CTLTYPE_NODE }, \
 358   { "ipx", CTLTYPE_NODE }, \
 359   { "inet6", CTLTYPE_NODE }, \
 360   { "pip", CTLTYPE_NODE }, \
 361   { "isdn", CTLTYPE_NODE }, \
 362   { "natm", CTLTYPE_NODE }, \
 363   { "arp", CTLTYPE_NODE }, \
 364   { "key", CTLTYPE_NODE }, \
 365 }
 366
 367 struct kinfo_pcb {
 368   __uint64_t  ki_pcbaddr; /* PTR: pcb addr */
 369   __uint64_t  ki_ppcbaddr;  /* PTR: ppcb addr */
 370   __uint64_t  ki_sockaddr;  /* PTR: socket addr */
 371
 372   __uint32_t  ki_family;  /* INT: protocol family */
 373   __uint32_t  ki_type;  /* INT: socket type */
 374   __uint32_t  ki_protocol;  /* INT: protocol */
 375   __uint32_t  ki_pflags;  /* INT: generic protocol flags */
 376
 377   __uint32_t  ki_sostate; /* INT: socket state */
 378   __uint32_t  ki_prstate; /* INT: protocol state */
 379   __int32_t ki_tstate;  /* INT: tcp state */
 380   __uint32_t  ki_tflags;  /* INT: tcp flags */
 381
 382   __uint64_t  ki_rcvq;  /* U_LONG: receive queue len */
 383   __uint64_t  ki_sndq;  /* U_LONG: send queue len */
 384
 385   union {
 386     struct sockaddr _kis_src; /* STRUCT: local address */
 387     char _kis_pad[256 + 8];   /* pad to max addr length */
 388   } ki_s;
 389   union {
 390     struct sockaddr _kid_dst; /* STRUCT: remote address */
 391     char _kid_pad[256 + 8];   /* pad to max addr length */
 392   } ki_d;
 393
 394   __uint64_t  ki_inode; /* INO_T: fake inode number */
 395   __uint64_t  ki_vnode; /* PTR: if associated with file */
 396   __uint64_t  ki_conn;  /* PTR: control block of peer */
 397   __uint64_t  ki_refs;  /* PTR: referencing socket */
 398   __uint64_t  ki_nextref; /* PTR: link in refs list */
 399 };
 400
 401 #define ki_src ki_s._kis_src
 402 #define ki_dst ki_d._kid_dst
 403
 404 #define PCB_SLOP    20
 405 #define PCB_ALL     0
 406
 407 #endif /* _NETBSD_SOURCE */
 408
 409 #if defined(_NETBSD_SOURCE)
 410 /*
 411  * PF_ROUTE - Routing table
 412  *
 413  * Three additional levels are defined:
 414  *  Fourth: address family, 0 is wildcard
 415  *  Fifth: type of info, defined below
 416  *  Sixth: flag(s) to mask with for NET_RT_FLAGS
 417  */
 418 #define NET_RT_DUMP 1   /* dump; may limit to a.f. */
 419 #define NET_RT_FLAGS  2   /* by flags, e.g. RESOLVING */
 420 #define NET_RT_OIFLIST  3   /* old NET_RT_IFLIST (pre 1.5) */
 421 #define NET_RT_IFLIST 4   /* survey interface list */
 422 #define NET_RT_MAXID  5
 423
 424 #define CTL_NET_RT_NAMES { \
 425   { 0, 0 }, \
 426   { "dump", CTLTYPE_STRUCT }, \
 427   { "flags", CTLTYPE_STRUCT }, \
 428   { 0, 0 }, \
 429   { "iflist", CTLTYPE_STRUCT }, \
 430 }
 431 #endif /* _NETBSD_SOURCE */
 432
 433 /*
 434  * Maximum queue length specifiable by listen(2).
 435  */
 436 #ifndef SOMAXCONN
 437 #define SOMAXCONN 128
 438 #endif
 439
 440 /*
 441  * Message header for recvmsg and sendmsg calls.
 442  * Used value-result for recvmsg, value only for sendmsg.
 443  */
 444 struct msghdr {
 445   void    *msg_name;  /* optional address */
 446   socklen_t msg_namelen;  /* size of address */
 447   struct iovec  *msg_iov; /* scatter/gather array */
 448   int   msg_iovlen; /* # elements in msg_iov */
 449   void    *msg_control; /* ancillary data, see below */
 450   socklen_t msg_controllen; /* ancillary data buffer len */
 451   int   msg_flags;  /* flags on received message */
 452 };
 453
 454 #define MSG_OOB   0x0001    /* process out-of-band data */
 455 #define MSG_PEEK  0x0002    /* peek at incoming message */
 456 #define MSG_DONTROUTE 0x0004    /* send without using routing tables */
 457 #define MSG_EOR   0x0008    /* data completes record */
 458 #define MSG_TRUNC 0x0010    /* data discarded before delivery */
 459 #define MSG_CTRUNC  0x0020    /* control data lost before delivery */
 460 #define MSG_WAITALL 0x0040    /* wait for full request or error */
 461 #define MSG_DONTWAIT  0x0080    /* this message should be nonblocking */
 462 #define MSG_BCAST 0x0100    /* this message was rcvd using link-level brdcst */
 463 #define MSG_MCAST 0x0200    /* this message was rcvd using link-level mcast */
 464 #define MSG_NOSIGNAL  0x0400    /* do not generate SIGPIPE on EOF */
 465
 466 /*
 467  * Header for ancillary data objects in msg_control buffer.
 468  * Used for additional information with/about a datagram
 469  * not expressible by flags.  The format is a sequence
 470  * of message elements headed by cmsghdr structures.
 471  */
 472 struct cmsghdr {
 473   socklen_t cmsg_len; /* data byte count, including hdr */
 474   int   cmsg_level; /* originating protocol */
 475   int   cmsg_type;  /* protocol-specific type */
 476 /* followed by  u_char  cmsg_data[]; */
 477 };
 478
 479 /* given pointer to struct cmsghdr, return pointer to data */
 480 #define CMSG_DATA(cmsg) \
 481   ((u_char *)(void *)(cmsg) + __CMSG_ALIGN(sizeof(struct cmsghdr)))
 482 #define CCMSG_DATA(cmsg) \
 483   ((const u_char *)(const void *)(cmsg) + \
 484   __CMSG_ALIGN(sizeof(struct cmsghdr)))
 485
 486 /*
 487  * Alignment requirement for CMSG struct manipulation.
 488  * This basically behaves the same as ALIGN() ARCH/include/param.h.
 489  * We declare it separately for two reasons:
 490  * (1) avoid dependency between machine/param.h, and (2) to sync with kernel's
 491  * idea of ALIGNBYTES at runtime.
 492  * without (2), we can't guarantee binary compatibility in case of future
 493  * changes in ALIGNBYTES.
 494  */
 495 #define __CMSG_ALIGN(n) (((n) + __cmsg_alignbytes()) & ~__cmsg_alignbytes())
 496 #ifdef _KERNEL
 497 #define CMSG_ALIGN(n) __CMSG_ALIGN(n)
 498 #endif
 499
 500 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
 501 #define CMSG_NXTHDR(mhdr, cmsg) \
 502   (((__caddr_t)(cmsg) + __CMSG_ALIGN((cmsg)->cmsg_len) + \
 503           __CMSG_ALIGN(sizeof(struct cmsghdr)) > \
 504       (((__caddr_t)(mhdr)->msg_control) + (mhdr)->msg_controllen)) ? \
 505       (struct cmsghdr *)0 : \
 506       (struct cmsghdr *)((__caddr_t)(cmsg) + \
 507           __CMSG_ALIGN((cmsg)->cmsg_len)))
 508
 509 /*
 510  * RFC 2292 requires to check msg_controllen, in case that the kernel returns
 511  * an empty list for some reasons.
 512  */
 513 #define CMSG_FIRSTHDR(mhdr) \
 514   ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
 515    (struct cmsghdr *)(mhdr)->msg_control : \
 516    (struct cmsghdr *)0)
 517
 518 #define CMSG_SPACE(l) (__CMSG_ALIGN(sizeof(struct cmsghdr)) + __CMSG_ALIGN(l))
 519 #define CMSG_LEN(l) (__CMSG_ALIGN(sizeof(struct cmsghdr)) + (l))
 520
 521 /* "Socket"-level control message types: */
 522 #define SCM_RIGHTS  0x01    /* access rights (array of int) */
 523 #if defined(_NETBSD_SOURCE)
 524 #define SCM_TIMESTAMP 0x02    /* timestamp (struct timeval) */
 525 #define SCM_CREDS 0x04    /* credentials (struct sockcred) */
 526 #endif
 527
 528 /*
 529  * Types of socket shutdown(2).
 530  */
 531 #define SHUT_RD   0   /* Disallow further receives. */
 532 #define SHUT_WR   1   /* Disallow further sends. */
 533 #define SHUT_RDWR 2   /* Disallow further sends/receives. */
 534
 535 #include <sys/EfiCdefs.h>
 536
 537 __BEGIN_DECLS
 538 int __cmsg_alignbytes(void);
 539 __END_DECLS
 540
 541 #ifndef _KERNEL
 542
 543 __BEGIN_DECLS
 544 int accept(int, struct sockaddr * __restrict, socklen_t * __restrict);
 545 int bind(int, const struct sockaddr *, socklen_t);
 546 int connect(int, const struct sockaddr *, socklen_t);
 547 int getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict);
 548 int getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict);
 549 int getsockopt(int, int, int, void * __restrict, socklen_t * __restrict);
 550 int listen(int, int);
 551 ssize_t recv(int, void *, size_t, int);
 552 ssize_t recvfrom(int, void * __restrict, size_t, int,
 553       struct sockaddr * __restrict, socklen_t * __restrict);
 554 ssize_t recvmsg(int, struct msghdr *, int);
 555 ssize_t send(int, const void *, size_t, int);
 556 ssize_t sendto(int, const void *,
 557       size_t, int, const struct sockaddr *, socklen_t);
 558 ssize_t sendmsg(int, const struct msghdr *, int);
 559 int setsockopt(int, int, int, const void *, socklen_t);
 560 int shutdown(int, int);
 561 int sockatmark(int);
 562 int socket(int, int, int)
 563 #if !defined(__LIBC12_SOURCE__) && !defined(_STANDALONE)
 564 __RENAME(__socket30)
 565 #endif
 566            ;
 567 int socketpair(int, int, int, int *);
 568 __END_DECLS
 569 #endif /* !_KERNEL */
 570
 571 #endif /* !_SYS_SOCKET_H_ */