[mirror_edk2.git] / StdLib / Include / sys / socket.h

/*  $NetBSD: socket.h,v 1.82 2006/06/27 03:49:08 mrg Exp $  */\r
\r
/*\r
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.\r
 * All rights reserved.\r
 *\r
 * Redistribution and use in source and binary forms, with or without\r
 * modification, are permitted provided that the following conditions\r
 * are met:\r
 * 1. Redistributions of source code must retain the above copyright\r
 *    notice, this list of conditions and the following disclaimer.\r
 * 2. Redistributions in binary form must reproduce the above copyright\r
 *    notice, this list of conditions and the following disclaimer in the\r
 *    documentation and/or other materials provided with the distribution.\r
 * 3. Neither the name of the project nor the names of its contributors\r
 *    may be used to endorse or promote products derived from this software\r
 *    without specific prior written permission.\r
 *\r
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND\r
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE\r
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
 * SUCH DAMAGE.\r
 */\r
\r
/*\r
 * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994\r
 *  The Regents of the University of California.  All rights reserved.\r
 *\r
 * Redistribution and use in source and binary forms, with or without\r
 * modification, are permitted provided that the following conditions\r
 * are met:\r
 * 1. Redistributions of source code must retain the above copyright\r
 *    notice, this list of conditions and the following disclaimer.\r
 * 2. Redistributions in binary form must reproduce the above copyright\r
 *    notice, this list of conditions and the following disclaimer in the\r
 *    documentation and/or other materials provided with the distribution.\r
 * 3. Neither the name of the University nor the names of its contributors\r
 *    may be used to endorse or promote products derived from this software\r
 *    without specific prior written permission.\r
 *\r
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
 * SUCH DAMAGE.\r
 *\r
 *  @(#)socket.h  8.6 (Berkeley) 5/3/95\r
 */\r
\r
#ifndef _SYS_SOCKET_H_\r
#define _SYS_SOCKET_H_\r
\r
#include <sys/featuretest.h>\r
\r
/*\r
 * Definitions related to sockets: types, address families, options.\r
 */\r
\r
/*\r
 * Data types.\r
 */\r
#include <sys/ansi.h>\r
\r
#ifndef sa_family_t\r
typedef __sa_family_t sa_family_t;\r
#define sa_family_t __sa_family_t\r
#endif\r
\r
#ifndef socklen_t\r
typedef __socklen_t socklen_t;\r
#define socklen_t __socklen_t\r
#endif\r
\r
#include <machine/ansi.h>\r
\r
#ifdef  _BSD_SIZE_T_\r
typedef _BSD_SIZE_T_  size_t;\r
#undef  _BSD_SIZE_T_\r
#endif\r
\r
#ifdef  _BSD_SSIZE_T_\r
typedef _BSD_SSIZE_T_ ssize_t;\r
#undef  _BSD_SSIZE_T_\r
#endif\r
\r
#include <sys/uio.h>\r
\r
/*\r
 * Socket types.\r
 */\r
#define SOCK_STREAM 1   /* stream socket */\r
#define SOCK_DGRAM  2   /* datagram socket */\r
#define SOCK_RAW  3   /* raw-protocol interface */\r
#define SOCK_RDM  4   /* reliably-delivered message */\r
#define SOCK_SEQPACKET  5   /* sequenced packet stream */\r
\r
/*\r
 * Option flags per-socket.\r
 */\r
#define SO_DEBUG  0x0001    /* turn on debugging info recording */\r
#define SO_ACCEPTCONN 0x0002    /* socket has had listen() */\r
#define SO_REUSEADDR  0x0004    /* allow local address reuse */\r
#define SO_KEEPALIVE  0x0008    /* keep connections alive */\r
#define SO_DONTROUTE  0x0010    /* just use interface addresses */\r
#define SO_BROADCAST  0x0020    /* permit sending of broadcast msgs */\r
#define SO_USELOOPBACK  0x0040    /* bypass hardware when possible */\r
#define SO_LINGER 0x0080    /* linger on close if data present */\r
#define SO_OOBINLINE  0x0100    /* leave received OOB data in line */\r
#define SO_REUSEPORT  0x0200    /* allow local address & port reuse */\r
#define SO_TIMESTAMP  0x0400    /* timestamp received dgram traffic */\r
\r
\r
/*\r
 * Additional options, not kept in so_options.\r
 */\r
#define SO_SNDBUF 0x1001    /* send buffer size */\r
#define SO_RCVBUF 0x1002    /* receive buffer size */\r
#define SO_SNDLOWAT 0x1003    /* send low-water mark */\r
#define SO_RCVLOWAT 0x1004    /* receive low-water mark */\r
#define SO_SNDTIMEO 0x1005    /* send timeout */\r
#define SO_RCVTIMEO 0x1006    /* receive timeout */\r
#define SO_ERROR  0x1007    /* get error status and clear */\r
#define SO_TYPE   0x1008    /* get socket type */\r
#define SO_OVERFLOWED 0x1009    /* datagrams: return packets dropped */\r
\r
/*\r
 * Structure used for manipulating linger option.\r
 */\r
struct  linger {\r
  int l_onoff;    /* option on/off */\r
  int l_linger;   /* linger time in seconds */\r
};\r
\r
/*\r
 * Level number for (get/set)sockopt() to apply to socket itself.\r
 */\r
#define SOL_SOCKET  0xffff    /* options for socket level */\r
\r
/*\r
 * Address families.\r
 */\r
#define AF_UNSPEC 0   /* unspecified */\r
#define AF_LOCAL  1   /* local to host (pipes, portals) */\r
#define AF_UNIX   AF_LOCAL  /* backward compatibility */\r
#define AF_INET   2   /* internetwork: UDP, TCP, etc. */\r
#define AF_IMPLINK  3   /* arpanet imp addresses */\r
#define AF_PUP    4   /* pup protocols: e.g. BSP */\r
#define AF_CHAOS  5   /* mit CHAOS protocols */\r
#define AF_NS   6   /* XEROX NS protocols */\r
#define AF_ISO    7   /* ISO protocols */\r
#define AF_OSI    AF_ISO\r
#define AF_ECMA   8   /* european computer manufacturers */\r
#define AF_DATAKIT  9   /* datakit protocols */\r
#define AF_CCITT  10    /* CCITT protocols, X.25 etc */\r
#define AF_SNA    11    /* IBM SNA */\r
#define AF_DECnet 12    /* DECnet */\r
#define AF_DLI    13    /* DEC Direct data link interface */\r
#define AF_LAT    14    /* LAT */\r
#define AF_HYLINK 15    /* NSC Hyperchannel */\r
#define AF_APPLETALK  16    /* Apple Talk */\r
#define AF_ROUTE  17    /* Internal Routing Protocol */\r
#define AF_LINK   18    /* Link layer interface */\r
#if defined(_NETBSD_SOURCE)\r
#define pseudo_AF_XTP 19    /* eXpress Transfer Protocol (no AF) */\r
#endif\r
#define AF_COIP   20    /* connection-oriented IP, aka ST II */\r
#define AF_CNT    21    /* Computer Network Technology */\r
#if defined(_NETBSD_SOURCE)\r
#define pseudo_AF_RTIP  22    /* Help Identify RTIP packets */\r
#endif\r
#define AF_IPX    23    /* Novell Internet Protocol */\r
#define AF_INET6  24    /* IP version 6 */\r
#if defined(_NETBSD_SOURCE)\r
#define pseudo_AF_PIP 25    /* Help Identify PIP packets */\r
#endif\r
#define AF_ISDN   26    /* Integrated Services Digital Network*/\r
#define AF_E164   AF_ISDN   /* CCITT E.164 recommendation */\r
#define AF_NATM   27    /* native ATM access */\r
#define AF_ARP    28    /* (rev.) addr. res. prot. (RFC 826) */\r
#if defined(_NETBSD_SOURCE)\r
#define pseudo_AF_KEY 29    /* Internal key management protocol  */\r
#define pseudo_AF_HDRCMPLT 30   /* Used by BPF to not rewrite hdrs\r
             in interface output routine */\r
#endif\r
#define AF_BLUETOOTH  31\r
\r
#define AF_MAX    32\r
\r
/*\r
 * Structure used by kernel to store most\r
 * addresses.\r
 */\r
struct sockaddr {\r
  __uint8_t sa_len;   /* total length */\r
  sa_family_t sa_family;  /* address family */\r
  char    sa_data[14];  /* actually longer; address value */\r
};\r
\r
#if defined(_KERNEL)\r
/*\r
 * Structure used by kernel to pass protocol\r
 * information in raw sockets.\r
 */\r
struct sockproto {\r
  u_short sp_family;    /* address family */\r
  u_short sp_protocol;    /* protocol */\r
};\r
#endif /* _KERNEL */\r
\r
#if 1\r
/*\r
 * RFC 2553: protocol-independent placeholder for socket addresses\r
 */\r
#define _SS_MAXSIZE 128\r
#define _SS_ALIGNSIZE (sizeof(__int64_t))\r
#define _SS_PAD1SIZE  (_SS_ALIGNSIZE - 2)\r
#define _SS_PAD2SIZE  (_SS_MAXSIZE - 2 - \\r
        _SS_PAD1SIZE - _SS_ALIGNSIZE)\r
\r
#if (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)\r
struct sockaddr_storage {\r
  __uint8_t ss_len;   /* address length */\r
  sa_family_t ss_family;  /* address family */\r
  char    __ss_pad1[_SS_PAD1SIZE];\r
  __int64_t     __ss_align;/* force desired structure storage alignment */\r
  char    __ss_pad2[_SS_PAD2SIZE];\r
};\r
#endif /* _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */\r
#endif /* 1 */\r
\r
/*\r
 * Protocol families, same as address families for now.\r
 */\r
#define PF_UNSPEC AF_UNSPEC\r
#define PF_LOCAL  AF_LOCAL\r
#define PF_UNIX   PF_LOCAL  /* backward compatibility */\r
#define PF_INET   AF_INET\r
#define PF_IMPLINK  AF_IMPLINK\r
#define PF_PUP    AF_PUP\r
#define PF_CHAOS  AF_CHAOS\r
#define PF_NS   AF_NS\r
#define PF_ISO    AF_ISO\r
#define PF_OSI    AF_ISO\r
#define PF_ECMA   AF_ECMA\r
#define PF_DATAKIT  AF_DATAKIT\r
#define PF_CCITT  AF_CCITT\r
#define PF_SNA    AF_SNA\r
#define PF_DECnet AF_DECnet\r
#define PF_DLI    AF_DLI\r
#define PF_LAT    AF_LAT\r
#define PF_HYLINK AF_HYLINK\r
#define PF_APPLETALK  AF_APPLETALK\r
#define PF_ROUTE  AF_ROUTE\r
#define PF_LINK   AF_LINK\r
#if defined(_NETBSD_SOURCE)\r
#define PF_XTP    pseudo_AF_XTP /* really just proto family, no AF */\r
#endif\r
#define PF_COIP   AF_COIP\r
#define PF_CNT    AF_CNT\r
#define PF_INET6  AF_INET6\r
#define PF_IPX    AF_IPX    /* same format as AF_NS */\r
#if defined(_NETBSD_SOURCE)\r
#define PF_RTIP   pseudo_AF_RTIP  /* same format as AF_INET */\r
#define PF_PIP    pseudo_AF_PIP\r
#endif\r
#define PF_ISDN   AF_ISDN   /* same as E164 */\r
#define PF_E164   AF_E164\r
#define PF_NATM   AF_NATM\r
#define PF_ARP    AF_ARP\r
#if defined(_NETBSD_SOURCE)\r
#define PF_KEY    pseudo_AF_KEY /* like PF_ROUTE, only for key mgmt */\r
#endif\r
#define PF_BLUETOOTH  AF_BLUETOOTH\r
\r
#define PF_MAX    AF_MAX\r
\r
#if defined(_NETBSD_SOURCE)\r
\r
#ifndef gid_t\r
typedef __gid_t   gid_t;    /* group id */\r
#define gid_t   __gid_t\r
#endif\r
\r
#ifndef uid_t\r
typedef __uid_t   uid_t;    /* user id */\r
#define uid_t   __uid_t\r
#endif\r
\r
/*\r
 * Socket credentials.\r
 */\r
struct sockcred {\r
  uid_t sc_uid;     /* real user id */\r
  uid_t sc_euid;    /* effective user id */\r
  gid_t sc_gid;     /* real group id */\r
  gid_t sc_egid;    /* effective group id */\r
  int sc_ngroups;   /* number of supplemental groups */\r
  gid_t sc_groups[1];   /* variable length */\r
};\r
\r
/*\r
 * Compute size of a sockcred structure with groups.\r
 */\r
#define SOCKCREDSIZE(ngrps) \\r
  (sizeof(struct sockcred) + (sizeof(gid_t) * ((ngrps) - 1)))\r
#endif /* _NETBSD_SOURCE */\r
\r
\r
#if defined(_NETBSD_SOURCE)\r
/*\r
 * Definitions for network related sysctl, CTL_NET.\r
 *\r
 * Second level is protocol family.\r
 * Third level is protocol number.\r
 *\r
 * Further levels are defined by the individual families below.\r
 */\r
#define NET_MAXID AF_MAX\r
\r
#define CTL_NET_NAMES { \\r
  { 0, 0 }, \\r
  { "local", CTLTYPE_NODE }, \\r
  { "inet", CTLTYPE_NODE }, \\r
  { "implink", CTLTYPE_NODE }, \\r
  { "pup", CTLTYPE_NODE }, \\r
  { "chaos", CTLTYPE_NODE }, \\r
  { "xerox_ns", CTLTYPE_NODE }, \\r
  { "iso", CTLTYPE_NODE }, \\r
  { "emca", CTLTYPE_NODE }, \\r
  { "datakit", CTLTYPE_NODE }, \\r
  { "ccitt", CTLTYPE_NODE }, \\r
  { "ibm_sna", CTLTYPE_NODE }, \\r
  { "decnet", CTLTYPE_NODE }, \\r
  { "dec_dli", CTLTYPE_NODE }, \\r
  { "lat", CTLTYPE_NODE }, \\r
  { "hylink", CTLTYPE_NODE }, \\r
  { "appletalk", CTLTYPE_NODE }, \\r
  { "route", CTLTYPE_NODE }, \\r
  { "link_layer", CTLTYPE_NODE }, \\r
  { "xtp", CTLTYPE_NODE }, \\r
  { "coip", CTLTYPE_NODE }, \\r
  { "cnt", CTLTYPE_NODE }, \\r
  { "rtip", CTLTYPE_NODE }, \\r
  { "ipx", CTLTYPE_NODE }, \\r
  { "inet6", CTLTYPE_NODE }, \\r
  { "pip", CTLTYPE_NODE }, \\r
  { "isdn", CTLTYPE_NODE }, \\r
  { "natm", CTLTYPE_NODE }, \\r
  { "arp", CTLTYPE_NODE }, \\r
  { "key", CTLTYPE_NODE }, \\r
}\r
\r
struct kinfo_pcb {\r
  __uint64_t  ki_pcbaddr; /* PTR: pcb addr */\r
  __uint64_t  ki_ppcbaddr;  /* PTR: ppcb addr */\r
  __uint64_t  ki_sockaddr;  /* PTR: socket addr */\r
\r
  __uint32_t  ki_family;  /* INT: protocol family */\r
  __uint32_t  ki_type;  /* INT: socket type */\r
  __uint32_t  ki_protocol;  /* INT: protocol */\r
  __uint32_t  ki_pflags;  /* INT: generic protocol flags */\r
\r
  __uint32_t  ki_sostate; /* INT: socket state */\r
  __uint32_t  ki_prstate; /* INT: protocol state */\r
  __int32_t ki_tstate;  /* INT: tcp state */\r
  __uint32_t  ki_tflags;  /* INT: tcp flags */\r
\r
  __uint64_t  ki_rcvq;  /* U_LONG: receive queue len */\r
  __uint64_t  ki_sndq;  /* U_LONG: send queue len */\r
\r
  union {\r
    struct sockaddr _kis_src; /* STRUCT: local address */\r
    char _kis_pad[256 + 8];   /* pad to max addr length */\r
  } ki_s;\r
  union {\r
    struct sockaddr _kid_dst; /* STRUCT: remote address */\r
    char _kid_pad[256 + 8];   /* pad to max addr length */\r
  } ki_d;\r
\r
  __uint64_t  ki_inode; /* INO_T: fake inode number */\r
  __uint64_t  ki_vnode; /* PTR: if associated with file */\r
  __uint64_t  ki_conn;  /* PTR: control block of peer */\r
  __uint64_t  ki_refs;  /* PTR: referencing socket */\r
  __uint64_t  ki_nextref; /* PTR: link in refs list */\r
};\r
\r
#define ki_src ki_s._kis_src\r
#define ki_dst ki_d._kid_dst\r
\r
#define PCB_SLOP    20\r
#define PCB_ALL     0\r
\r
#endif /* _NETBSD_SOURCE */\r
\r
#if defined(_NETBSD_SOURCE)\r
/*\r
 * PF_ROUTE - Routing table\r
 *\r
 * Three additional levels are defined:\r
 *  Fourth: address family, 0 is wildcard\r
 *  Fifth: type of info, defined below\r
 *  Sixth: flag(s) to mask with for NET_RT_FLAGS\r
 */\r
#define NET_RT_DUMP 1   /* dump; may limit to a.f. */\r
#define NET_RT_FLAGS  2   /* by flags, e.g. RESOLVING */\r
#define NET_RT_OIFLIST  3   /* old NET_RT_IFLIST (pre 1.5) */\r
#define NET_RT_IFLIST 4   /* survey interface list */\r
#define NET_RT_MAXID  5\r
\r
#define CTL_NET_RT_NAMES { \\r
  { 0, 0 }, \\r
  { "dump", CTLTYPE_STRUCT }, \\r
  { "flags", CTLTYPE_STRUCT }, \\r
  { 0, 0 }, \\r
  { "iflist", CTLTYPE_STRUCT }, \\r
}\r
#endif /* _NETBSD_SOURCE */\r
\r
/*\r
 * Maximum queue length specifiable by listen(2).\r
 */\r
#ifndef SOMAXCONN\r
#define SOMAXCONN 128\r
#endif\r
\r
/*\r
 * Message header for recvmsg and sendmsg calls.\r
 * Used value-result for recvmsg, value only for sendmsg.\r
 */\r
struct msghdr {\r
  void    *msg_name;  /* optional address */\r
  socklen_t msg_namelen;  /* size of address */\r
  struct iovec  *msg_iov; /* scatter/gather array */\r
  int   msg_iovlen; /* # elements in msg_iov */\r
  void    *msg_control; /* ancillary data, see below */\r
  socklen_t msg_controllen; /* ancillary data buffer len */\r
  int   msg_flags;  /* flags on received message */\r
};\r
\r
#define MSG_OOB   0x0001    /* process out-of-band data */\r
#define MSG_PEEK  0x0002    /* peek at incoming message */\r
#define MSG_DONTROUTE 0x0004    /* send without using routing tables */\r
#define MSG_EOR   0x0008    /* data completes record */\r
#define MSG_TRUNC 0x0010    /* data discarded before delivery */\r
#define MSG_CTRUNC  0x0020    /* control data lost before delivery */\r
#define MSG_WAITALL 0x0040    /* wait for full request or error */\r
#define MSG_DONTWAIT  0x0080    /* this message should be nonblocking */\r
#define MSG_BCAST 0x0100    /* this message was rcvd using link-level brdcst */\r
#define MSG_MCAST 0x0200    /* this message was rcvd using link-level mcast */\r
#define MSG_NOSIGNAL  0x0400    /* do not generate SIGPIPE on EOF */\r
\r
/*\r
 * Header for ancillary data objects in msg_control buffer.\r
 * Used for additional information with/about a datagram\r
 * not expressible by flags.  The format is a sequence\r
 * of message elements headed by cmsghdr structures.\r
 */\r
struct cmsghdr {\r
  socklen_t cmsg_len; /* data byte count, including hdr */\r
  int   cmsg_level; /* originating protocol */\r
  int   cmsg_type;  /* protocol-specific type */\r
/* followed by  u_char  cmsg_data[]; */\r
};\r
\r
/* given pointer to struct cmsghdr, return pointer to data */\r
#define CMSG_DATA(cmsg) \\r
  ((u_char *)(void *)(cmsg) + __CMSG_ALIGN(sizeof(struct cmsghdr)))\r
#define CCMSG_DATA(cmsg) \\r
  ((const u_char *)(const void *)(cmsg) + \\r
  __CMSG_ALIGN(sizeof(struct cmsghdr)))\r
\r
/*\r
 * Alignment requirement for CMSG struct manipulation.\r
 * This basically behaves the same as ALIGN() ARCH/include/param.h.\r
 * We declare it separately for two reasons:\r
 * (1) avoid dependency between machine/param.h, and (2) to sync with kernel's\r
 * idea of ALIGNBYTES at runtime.\r
 * without (2), we can't guarantee binary compatibility in case of future\r
 * changes in ALIGNBYTES.\r
 */\r
#define __CMSG_ALIGN(n) (((n) + __cmsg_alignbytes()) & ~__cmsg_alignbytes())\r
#ifdef _KERNEL\r
#define CMSG_ALIGN(n) __CMSG_ALIGN(n)\r
#endif\r
\r
/* given pointer to struct cmsghdr, return pointer to next cmsghdr */\r
#define CMSG_NXTHDR(mhdr, cmsg) \\r
  (((__caddr_t)(cmsg) + __CMSG_ALIGN((cmsg)->cmsg_len) + \\r
          __CMSG_ALIGN(sizeof(struct cmsghdr)) > \\r
      (((__caddr_t)(mhdr)->msg_control) + (mhdr)->msg_controllen)) ? \\r
      (struct cmsghdr *)0 : \\r
      (struct cmsghdr *)((__caddr_t)(cmsg) + \\r
          __CMSG_ALIGN((cmsg)->cmsg_len)))\r
\r
/*\r
 * RFC 2292 requires to check msg_controllen, in case that the kernel returns\r
 * an empty list for some reasons.\r
 */\r
#define CMSG_FIRSTHDR(mhdr) \\r
  ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \\r
   (struct cmsghdr *)(mhdr)->msg_control : \\r
   (struct cmsghdr *)0)\r
\r
#define CMSG_SPACE(l) (__CMSG_ALIGN(sizeof(struct cmsghdr)) + __CMSG_ALIGN(l))\r
#define CMSG_LEN(l) (__CMSG_ALIGN(sizeof(struct cmsghdr)) + (l))\r
\r
/* "Socket"-level control message types: */\r
#define SCM_RIGHTS  0x01    /* access rights (array of int) */\r
#if defined(_NETBSD_SOURCE)\r
#define SCM_TIMESTAMP 0x02    /* timestamp (struct timeval) */\r
#define SCM_CREDS 0x04    /* credentials (struct sockcred) */\r
#endif\r
\r
/*\r
 * Types of socket shutdown(2).\r
 */\r
#define SHUT_RD   0   /* Disallow further receives. */\r
#define SHUT_WR   1   /* Disallow further sends. */\r
#define SHUT_RDWR 2   /* Disallow further sends/receives. */\r
\r
#include <sys/EfiCdefs.h>\r
\r
__BEGIN_DECLS\r
int __cmsg_alignbytes(void);\r
__END_DECLS\r
\r
#ifndef _KERNEL\r
\r
__BEGIN_DECLS\r
int accept(int, struct sockaddr * __restrict, socklen_t * __restrict);\r
int bind(int, const struct sockaddr *, socklen_t);\r
int connect(int, const struct sockaddr *, socklen_t);\r
int getpeername(int, struct sockaddr * __restrict, socklen_t * __restrict);\r
int getsockname(int, struct sockaddr * __restrict, socklen_t * __restrict);\r
int getsockopt(int, int, int, void * __restrict, socklen_t * __restrict);\r
int listen(int, int);\r
ssize_t recv(int, void *, size_t, int);\r
ssize_t recvfrom(int, void * __restrict, size_t, int,\r
      struct sockaddr * __restrict, socklen_t * __restrict);\r
ssize_t recvmsg(int, struct msghdr *, int);\r
ssize_t send(int, const void *, size_t, int);\r
ssize_t sendto(int, const void *,\r
      size_t, int, const struct sockaddr *, socklen_t);\r
ssize_t sendmsg(int, const struct msghdr *, int);\r
int setsockopt(int, int, int, const void *, socklen_t);\r
int shutdown(int, int);\r
int sockatmark(int);\r
int socket(int, int, int)\r
#if !defined(__LIBC12_SOURCE__) && !defined(_STANDALONE)\r
__RENAME(__socket30)\r
#endif\r
           ;\r
int socketpair(int, int, int, int *);\r
__END_DECLS\r
#endif /* !_KERNEL */\r
\r
#endif /* !_SYS_SOCKET_H_ */\r