sysdeps/unix/sysv/linux/socketbits.h

   1 /* System-specific socket constants and types.  Linux version.
   2    Copyright (C) 1991, 92, 94, 95, 96, 97 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #ifndef _SOCKETBITS_H
  21
  22 #define _SOCKETBITS_H   1
  23 #include <features.h>
  24
  25 #define __need_size_t
  26 #define __need_NULL
  27 #include <stddef.h>
  28
  29
  30 __BEGIN_DECLS
  31
  32 /* Types of sockets.  */
  33 enum __socket_type
  34 {
  35   SOCK_STREAM = 1,              /* Sequenced, reliable, connection-based
  36                                    byte streams.  */
  37 #define SOCK_STREAM SOCK_STREAM
  38   SOCK_DGRAM = 2,               /* Connectionless, unreliable datagrams
  39                                    of fixed maximum length.  */
  40 #define SOCK_DGRAM SOCK_DGRAM
  41   SOCK_RAW = 3,                 /* Raw protocol interface.  */
  42 #define SOCK_RAW SOCK_RAW
  43   SOCK_RDM = 4,                 /* Reliably-delivered messages.  */
  44 #define SOCK_RDM SOCK_RDM
  45   SOCK_SEQPACKET = 5,           /* Sequenced, reliable, connection-based,
  46                                    datagrams of fixed maximum length.  */
  47 #define SOCK_SEQPACKET SOCK_SEQPACKET
  48   SOCK_PACKET = 10              /* Linux specific way of getting packets
  49                                    at the dev level.  For writing rarp and
  50                                    other similar things on the user level. */
  51 #define SOCK_PACKET SOCK_PACKET
  52 };
  53
  54 /* Protocol families.  */
  55 #define PF_UNSPEC       0       /* Unspecified.  */
  56 #define PF_LOCAL        1       /* Local to host (pipes and file-domain).  */
  57 #define PF_UNIX         PF_LOCAL /* Old BSD name for PF_LOCAL.  */
  58 #define PF_FILE         PF_LOCAL /* POSIX name for PF_LOCAL.  */
  59 #define PF_INET         2       /* IP protocol family.  */
  60 #define PF_AX25         3       /* Amateur Radio AX.25.  */
  61 #define PF_IPX          4       /* Novell Internet Protocol.  */
  62 #define PF_APPLETALK    5       /* Don't use this.  */
  63 #define PF_NETROM       6       /* Amateur radio NetROM.  */
  64 #define PF_BRIDGE       7       /* Multiprotocol bridge.  */
  65 #define PF_AAL5         8       /* Reserved for Werner's ATM.  */
  66 #define PF_X25          9       /* Reserved for X.25 project.  */
  67 #define PF_INET6        10      /* IP version 6.  */
  68 #define PF_MAX          12      /* For now.. */
  69
  70 /* Address families.  */
  71 #define AF_UNSPEC       PF_UNSPEC
  72 #define AF_LOCAL        PF_LOCAL
  73 #define AF_UNIX         PF_UNIX
  74 #define AF_FILE         PF_FILE
  75 #define AF_INET         PF_INET
  76 #define AF_AX25         PF_AX25
  77 #define AF_IPX          PF_IPX
  78 #define AF_APPLETALK    PF_APPLETALK
  79 #define AF_NETROM       PF_NETROM
  80 #define AF_BRIDGE       PF_BRIDGE
  81 #define AF_AAL5         PF_AAL5
  82 #define AF_X25          PF_X25
  83 #define AF_INET6        PF_INET6
  84 #define AF_MAX          PF_MAX
  85
  86 /* Socket level values.  Others are defined in the appropriate headers.
  87
  88    XXX These definitions also should go into the appropriate headers as
  89    far as they are available.  */
  90 #define SOL_IPV6        41
  91 #define SOL_ICMPV6      58
  92 #define SOL_RAW         255
  93 #define SOL_AX25        257
  94 #define SOL_ATALK       258
  95 #define SOL_NETROM      259
  96 #define SOL_ROSE        260
  97 #define SOL_DECNET      261
  98 #define SOL_X25         262
  99
 100 /* Maximum queue length specifiable by listen.  */
 101 #define SOMAXCONN       128
 102
 103 /* Get the definition of the macro to define the common sockaddr members.  */
 104 #include <sockaddrcom.h>
 105
 106 /* Structure describing a generic socket address.  */
 107 struct sockaddr
 108   {
 109     __SOCKADDR_COMMON (sa_);    /* Common data: address family and length.  */
 110     char sa_data[14];           /* Address data.  */
 111   };
 112
 113
 114 /* Bits in the FLAGS argument to `send', `recv', et al.  */
 115 enum
 116   {
 117     MSG_OOB             = 0x01, /* Process out-of-band data.  */
 118     MSG_PEEK            = 0x02, /* Peek at incoming messages.  */
 119     MSG_DONTROUTE       = 0x04, /* Don't use local routing.  */
 120     MSG_CTRUNC          = 0x08, /* Control data lost before delivery.  */
 121     MSG_PROXY           = 0x10  /* Supply or ask second address.  */
 122   };
 123
 124
 125 /* Structure describing messages sent by
 126    `sendmsg' and received by `recvmsg'.  */
 127 struct msghdr
 128   {
 129     __ptr_t msg_name;           /* Address to send to/receive from.  */
 130     int msg_namelen;            /* Length of address data.  */
 131     /* XXX Should be type `size_t' according to POSIX.1g.  */
 132
 133     struct iovec *msg_iov;      /* Vector of data to send/receive into.  */
 134     size_t msg_iovlen;          /* Number of elements in the vector.  */
 135
 136     __ptr_t msg_control;        /* Ancillary data (eg BSD filedesc passing). */
 137     size_t msg_controllen;      /* Ancillary data buffer length.  */
 138     int msg_flags;              /* Flags on received message.  */
 139   };
 140
 141 /* Structure used for storage of ancillary data object information.  */
 142 struct cmsghdr
 143   {
 144     size_t cmsg_len;            /* Length of data in cmsg_data plus length
 145                                    of cmsghdr structure.  */
 146     int cmsg_level;             /* Originating protocol.  */
 147     int cmsg_type;              /* Protocol specific type.  */
 148 #if !defined __STRICT_ANSI__ && defined __GNUC__ && __GNUC__ >= 2
 149     unsigned char __cmsg_data[0]; /* Ancillary data.  */
 150 #endif
 151   };
 152
 153 /* Ancillary data object manipulation macros.  */
 154 #if !defined __STRICT_ANSI__ && defined __GNUC__ && __GNUC__ >= 2
 155 # define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
 156 #else
 157 # define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))
 158 #endif
 159 #define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg)
 160 #define CMSG_FIRSTHDR(mhdr) \
 161   ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr)                         \
 162    ? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) NULL)
 163
 164
 165 #ifndef _EXTERN_INLINE
 166 # define _EXTERN_INLINE extern __inline
 167 #endif
 168 extern struct cmsghdr *__cmsg_nxthdr __P ((struct msghdr *__mhdr,
 169                                            struct cmsghdr *__cmsg));
 170 _EXTERN_INLINE struct cmsghdr *
 171 __cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg)
 172 {
 173   unsigned char *__p;
 174
 175   if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr))
 176     /* The kernel header does this so there may be a reason.  */
 177     return NULL;
 178
 179   __p = (((unsigned char *) __cmsg)
 180          + ((__cmsg->cmsg_len + sizeof (long int) - 1) & ~sizeof (long int)));
 181   if (__p >= (unsigned char *) __mhdr->msg_control + __mhdr->msg_controllen)
 182     /* No more entries.  */
 183     return NULL;
 184   return (struct cmsghdr *) __p;
 185 }
 186
 187
 188 /* Get socket manipulation related informations from kernel headers.  */
 189 #include <asm/socket.h>
 190
 191
 192 /* Structure used to manipulate the SO_LINGER option.  */
 193 struct linger
 194   {
 195     int l_onoff;                /* Nonzero to linger on close.  */
 196     int l_linger;               /* Time to linger.  */
 197   };
 198
 199 __END_DECLS
 200
 201 #endif /* socketbits.h */