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socket.h

/* System-specific socket constants and types.  AIX version.
   Copyright (C) 1991,92,1994-1999,2000,2001 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#ifndef __BITS_SOCKET_H
#define __BITS_SOCKET_H

#if !defined _SYS_SOCKET_H && !defined _NETINET_IN_H
# error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
#endif

#define     __need_size_t
#define __need_NULL
#include <stddef.h>

#include <limits.h>
#include <sys/types.h>

/* Type for length arguments in socket calls.  */
#ifndef __socklen_t_defined
typedef __socklen_t socklen_t;
# define __socklen_t_defined
#endif

/* Types of sockets.  */
enum __socket_type
{
  SOCK_STREAM = 1,            /* Sequenced, reliable, connection-based
                           byte streams.  */
#define SOCK_STREAM SOCK_STREAM
  SOCK_DGRAM = 2,       /* Connectionless, unreliable datagrams
                           of fixed maximum length.  */
#define SOCK_DGRAM SOCK_DGRAM
  SOCK_RAW = 3,               /* Raw protocol interface.  */
#define SOCK_RAW SOCK_RAW
  SOCK_RDM = 4,               /* Reliably-delivered messages.  */
#define SOCK_RDM SOCK_RDM
  SOCK_SEQPACKET = 5,         /* Sequenced, reliable, connection-based,
                           datagrams of fixed maximum length.  */
#define SOCK_SEQPACKET SOCK_SEQPACKET
  SOCK_CONN_DGRAM = 6         /* Conneciton datagram.  */
#define SOCK_CONN_DGRAM SOCK_CONN_DGRAM
};

/* Protocol families.  */
#define     PF_UNSPEC   0     /* Unspecified.  */
#define     PF_LOCAL    1     /* Local to host (pipes and file-domain).  */
#define     PF_UNIX           PF_LOCAL /* Old BSD name for PF_LOCAL.  */
#define     PF_FILE           PF_LOCAL /* Another non-standard name for PF_LOCAL.  */
#define     PF_INET           2     /* IP protocol family.  */
#define PF_IMPLINK      3     /* ARPAnet IMP addresses.  */
#define PF_PUP          4     /* PUP protocols (e.g., BSP).  */
#define PF_CHAOS  5     /* MIT CHAOS protocols.  */
#define PF_NS           6     /* XEROX NS protocols.  */
#define PF_ISO          7     /* ISO protocols.  */
#define PF_OSI          PF_ISO
#define PF_ECMA         8     /* European Computer Manufacturers.  */
#define PF_DATAKIT      9     /* Datakit protocols.  */
#define PF_CCITT  10    /* CCITT protocols, X.25 etc. */
#define PF_SNA          11    /* IBM SNA.  */
#define PF_DECnet 12    /* DECnet.  */
#define PF_DLI          13    /* DEC Direct data link interface.  */
#define PF_LAT          14    /* LAT. */
#define PF_HYLINK 15    /* NSC Hyperchannel.  */
#define PF_APPLETALK    16    /* Apple Talk.  */
#define PF_NETLINK      17    /* Internet Routing Protocol.  */
#define     PF_ROUTE    PF_NETLINK /* Alias to emulate 4.4BSD.  */
#define PF_LINK         18    /* Link layer interface.  */
#define PF_XTP          19    /* eXpress Transfer Protocol (no AF).  */
#define PF_INTF         20    /* Debugging use only.  */
#define PF_RIF          21    /* Raw interface.  */
#define PF_NETWARE      22
#define PF_NDD          23
#define PF_INET6  24    /* IPv6.  */
#define PF_MAX          30    /* For now..  */

/* Address families.  */
#define AF_UNSPEC       PF_UNSPEC
#define AF_LOCAL        PF_LOCAL
#define AF_UNIX         PF_UNIX
#define AF_FILE         PF_FILE
#define AF_INET         PF_INET
#define AF_IMPLINK      PF_IMPLINK
#define AF_PUP          PF_PUP
#define AF_CHAOS        PF_CHAOS
#define AF_NS           PF_NS
#define AF_ISO          PF_ISO
#define AF_OSI          PF_OSI
#define AF_ECMA         PF_ECMA
#define AF_DATAKIT      PF_DATAKIT
#define AF_CCITT        PF_CCITT
#define AF_SNA          PF_SNA
#define AF_DECnet       PF_DECnet
#define AF_DLI          PF_DLI
#define AF_LAT          PF_LAT
#define AF_HYLINK       PF_HYLINK
#define AF_APPLETALK    PF_APPLETALK
#define AF_NETLINK      PF_NETLINK
#define AF_ROUTE        PF_ROUTE
#define AF_LINK         PF_LINK
#define AF_INTF         PF_INTF
#define AF_RIF          PF_RIF
#define AF_NETWARE      PF_NETWARE
#define AF_NDD          PF_NDD
#define AF_INET6        PF_INET6
#define AF_MAX          PF_MAX

/* Socket level values.  Others are defined in the appropriate headers.

   XXX These definitions also should go into the appropriate headers as
   far as they are available.  */
#define SOL_SOCKET      0xffff

/* Maximum queue length specifiable by listen.  */
#define SOMAXCONN 1024

/* Get the definition of the macro to define the common sockaddr members.  */
#include <bits/sockaddr.h>

/* Structure describing a generic socket address.  */
struct sockaddr
  {
    __SOCKADDR_COMMON (sa_);  /* Common data: address family and length.  */
    char sa_data[14];         /* Address data.  */
  };


/* Structure large enough to hold any socket address (with the historical
   exception of AF_UNIX).  We reserve 128 bytes.  */
#if ULONG_MAX > 0xffffffff
# define __ss_aligntype __uint64_t
#else
# define __ss_aligntype __uint32_t
#endif
#define _SS_SIZE  128
#define _SS_PADSIZE     (_SS_SIZE - (2 * sizeof (__ss_aligntype)))

struct sockaddr_storage
  {
    __SOCKADDR_COMMON (ss_);  /* Address family, etc.  */
    __ss_aligntype __ss_align;      /* Force desired alignment.  */
    char __ss_padding[_SS_PADSIZE];
  };


/* Bits in the FLAGS argument to `send', `recv', et al.  */
enum
  {
    MSG_OOB       = 0x01,     /* Process out-of-band data.  */
#define MSG_OOB         MSG_OOB
    MSG_PEEK            = 0x02,     /* Peek at incoming messages.  */
#define MSG_PEEK  MSG_PEEK
    MSG_DONTROUTE = 0x04,     /* Don't use local routing.  */
#define MSG_DONTROUTE   MSG_DONTROUTE
    MSG_EOR       = 0x08, /* End of record.  */
#define     MSG_EOR           MSG_EOR
    MSG_TRUNC           = 0x10,
#define     MSG_TRUNC   MSG_TRUNC
    MSG_CTRUNC          = 0x20,     /* Control data lost before delivery.  */
#define MSG_CTRUNC      MSG_CTRUNC
    MSG_WAITALL         = 0x40, /* Wait for a full request.  */
#define     MSG_WAITALL MSG_WAITALL
    MSG_MPEG2           = 0x80,     /* Message contain MPEG2 data.  */
#define MSG_MPEG2 MSG_MPEG2
  };


/* Structure describing messages sent by
   `sendmsg' and received by `recvmsg'.  */
struct msghdr
  {
    void *msg_name;           /* Address to send to/receive from.  */
    socklen_t msg_namelen;    /* Length of address data.  */

    struct iovec *msg_iov;    /* Vector of data to send/receive into.  */
    int msg_iovlen;           /* Number of elements in the vector.  */

    void *msg_control;        /* Ancillary data (eg BSD filedesc passing). */
    socklen_t msg_controllen; /* Ancillary data buffer length.  */

    int msg_flags;            /* Flags on received message.  */
  };

/* Structure used for storage of ancillary data object information.  */
struct cmsghdr
  {
    socklen_t cmsg_len;       /* Length of data in cmsg_data plus length
                           of cmsghdr structure.  */
    int cmsg_level;           /* Originating protocol.  */
    int cmsg_type;            /* Protocol specific type.  */
#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
    __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
#endif
  };

/* Ancillary data object manipulation macros.  */
#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
# define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
#else
# define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))
#endif
#define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg)
#define CMSG_FIRSTHDR(mhdr) \
  ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr)                 \
   ? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) NULL)
#define CMSG_ALIGN(len) (((len) + sizeof (size_t) - 1) \
                   & ~(sizeof (size_t) - 1))
#define CMSG_SPACE(len) (CMSG_ALIGN (len) \
                   + CMSG_ALIGN (sizeof (struct cmsghdr)))
#define CMSG_LEN(len)   (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))

extern struct cmsghdr *__cmsg_nxthdr (struct msghdr *__mhdr,
                              struct cmsghdr *__cmsg) __THROW;
#ifdef __USE_EXTERN_INLINES
# ifndef _EXTERN_INLINE
#  define _EXTERN_INLINE extern __inline
# endif
_EXTERN_INLINE struct cmsghdr *
__cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg) __THROW
{
  if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr))
    /* The kernel header does this so there may be a reason.  */
    return 0;

  __cmsg = (struct cmsghdr *) ((unsigned char *) __cmsg
                         + CMSG_ALIGN (__cmsg->cmsg_len));
  if ((unsigned char *) (__cmsg + 1) >= ((unsigned char *) __mhdr->msg_control
                               + __mhdr->msg_controllen)
      || ((unsigned char *) __cmsg + CMSG_ALIGN (__cmsg->cmsg_len)
        > ((unsigned char *) __mhdr->msg_control + __mhdr->msg_controllen)))
    /* No more entries.  */
    return 0;
  return __cmsg;
}
#endif      /* Use `extern inline'.  */

/* Socket level message types.  This must match the definitions in
   <linux/socket.h>.  */
enum
  {
    SCM_RIGHTS = 0x01         /* Transfer file descriptors.  */
#define SCM_RIGHTS SCM_RIGHTS
  };

/* Options flags per socket.  */
#define SO_DEBUG  0x0001      /* Turn on debugging info recording.  */
#define SO_ACCEPTCONN   0x0002      /* Socket has had listen().  */
#define SO_REUSEADDR    0x0004      /* Allow local address reuse.  */
#define SO_KEEPALIVE    0x0008      /* Keep connections alive.  */
#define SO_DONTROUTE    0x0010      /* Just use interface addresses.  */
#define SO_BROADCAST    0x0020      /* Permit sending of broadcast msgs.  */
#define SO_USELOOPBACK  0x0040      /* Bypass hardware when possible.  */
#define SO_LINGER 0x0080      /* Linger on close if data present.  */
#define SO_OOBINLINE    0x0100      /* Leave received OOB data in line.  */
#define SO_REUSEPORT    0x0200      /* Allow local address & port reuse.  */
#define SO_USE_IFBUFS   0x0400      /* Interface will supply buffers.  */
#define SO_CKSUMRECV    0x0800      /* Defer checksum until receive.  */
#define SO_NOREUSEADDR  0x1000      /* Prevent local address reuse.  */
#define SO_SNDBUF 0x1001      /* Send buffer size.  */
#define SO_RCVBUF 0x1002      /* Receive buffer size.  */
#define SO_SNDLOWAT     0x1003      /* Send low-water mark.  */
#define SO_RCVLOWAT     0x1004      /* Receive low-water mark.  */
#define SO_SNDTIMEO     0x1005      /* Send timeout.  */
#define SO_RCVTIMEO     0x1006      /* Receive timeout.  */
#define SO_ERROR  0x1007      /* Get error status and clear.  */
#define SO_TYPE         0x1008      /* Get socket type.  */
#define SO_KERNACCEPT   0x2000      /* Derive a in-kernel only socket.  */
#define SO_AUDIT  0x8000      /* Turn on socket auditing.  */


/* Structure used to manipulate the SO_LINGER option.  */
struct linger
  {
    int l_onoff;        /* Nonzero to linger on close.  */
    int l_linger;       /* Time to linger.  */
  };

#endif      /* bits/socket.h */

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