sysdeps/unix/bsd/bsd4.4/bits/socket.h

   1 /* System-specific socket constants and types.  4.4 BSD version.
   2    Copyright (C) 1991,92,1994-2002,2004,2007 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 Lesser General Public License as
   7    published by the Free Software Foundation; either version 2.1 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser 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 __BITS_SOCKET_H
  21 #define __BITS_SOCKET_H 1
  22
  23 #ifndef _SYS_SOCKET_H
  24 # error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
  25 #endif
  26
  27 #define __need_size_t
  28 #define __need_NULL
  29 #include <stddef.h>
  30
  31 #include <limits.h>             /* XXX Is this allowed?  */
  32 #include <bits/types.h>
  33
  34 /* Type for length arguments in socket calls.  */
  35 #ifndef __socklen_t_defined
  36 typedef __socklen_t socklen_t;
  37 # define __socklen_t_defined
  38 #endif
  39
  40
  41 /* Types of sockets.  */
  42 enum __socket_type
  43 {
  44   SOCK_STREAM = 1,              /* Sequenced, reliable, connection-based
  45                                    byte streams.  */
  46 #define SOCK_STREAM SOCK_STREAM
  47   SOCK_DGRAM = 2,               /* Connectionless, unreliable datagrams
  48                                    of fixed maximum length.  */
  49 #define SOCK_DGRAM SOCK_DGRAM
  50   SOCK_RAW = 3,                 /* Raw protocol interface.  */
  51 #define SOCK_RAW SOCK_RAW
  52   SOCK_RDM = 4,                 /* Reliably-delivered messages.  */
  53 #define SOCK_RDM SOCK_RDM
  54   SOCK_SEQPACKET = 5            /* Sequenced, reliable, connection-based,
  55                                    datagrams of fixed maximum length.  */
  56 #define SOCK_SEQPACKET SOCK_SEQPACKET
  57 };
  58
  59 /* Protocol families.  */
  60 #define PF_UNSPEC       0       /* Unspecified.  */
  61 #define PF_LOCAL        1       /* Local to host (pipes and file-domain).  */
  62 #define PF_UNIX         PF_LOCAL /* Old BSD name for PF_LOCAL.  */
  63 #define PF_FILE         PF_LOCAL /* POSIX name for PF_LOCAL.  */
  64 #define PF_INET         2       /* IP protocol family.  */
  65 #define PF_IMPLINK      3       /* ARPAnet IMP protocol.  */
  66 #define PF_PUP          4       /* PUP protocols.  */
  67 #define PF_CHAOS        5       /* MIT Chaos protocols.  */
  68 #define PF_NS           6       /* Xerox NS protocols.  */
  69 #define PF_ISO          7       /* ISO protocols.  */
  70 #define PF_OSI          PF_ISO
  71 #define PF_ECMA         8       /* ECMA protocols.  */
  72 #define PF_DATAKIT      9       /* AT&T Datakit protocols.  */
  73 #define PF_CCITT        10      /* CCITT protocols (X.25 et al).  */
  74 #define PF_SNA          11      /* IBM SNA protocol.  */
  75 #define PF_DECnet       12      /* DECnet protocols.  */
  76 #define PF_DLI          13      /* Direct data link interface.  */
  77 #define PF_LAT          14      /* DEC Local Area Transport protocol.  */
  78 #define PF_HYLINK       15      /* NSC Hyperchannel protocol.  */
  79 #define PF_APPLETALK    16      /* Don't use this.  */
  80 #define PF_ROUTE        17      /* Internal Routing Protocol.  */
  81 #define PF_LINK         18      /* Link layer interface.  */
  82 #define PF_XTP          19      /* eXpress Transfer Protocol (no AF).  */
  83 #define PF_COIP         20      /* Connection-oriented IP, aka ST II.  */
  84 #define PF_CNT          21      /* Computer Network Technology.  */
  85 #define PF_RTIP         22      /* Help Identify RTIP packets.  **/
  86 #define PF_IPX          23      /* Novell Internet Protocol.  */
  87 #define PF_SIP          24      /* Simple Internet Protocol.  */
  88 #define PF_PIP          25      /* Help Identify PIP packets.  */
  89 #define PF_INET6        26      /* IP version 6.  */
  90 #define PF_MAX          27
  91
  92 /* Address families.  */
  93 #define AF_UNSPEC       PF_UNSPEC
  94 #define AF_LOCAL        PF_LOCAL
  95 #define AF_UNIX         PF_UNIX
  96 #define AF_FILE         PF_FILE
  97 #define AF_INET         PF_INET
  98 #define AF_IMPLINK      PF_IMPLINK
  99 #define AF_PUP          PF_PUP
 100 #define AF_CHAOS        PF_CHAOS
 101 #define AF_NS           PF_NS
 102 #define AF_ISO          PF_ISO
 103 #define AF_OSI          PF_OSI
 104 #define AF_ECMA         PF_ECMA
 105 #define AF_DATAKIT      PF_DATAKIT
 106 #define AF_CCITT        PF_CCITT
 107 #define AF_SNA          PF_SNA
 108 #define AF_DECnet       PF_DECnet
 109 #define AF_DLI          PF_DLI
 110 #define AF_LAT          PF_LAT
 111 #define AF_HYLINK       PF_HYLINK
 112 #define AF_APPLETALK    PF_APPLETALK
 113 #define AF_ROUTE        PF_ROUTE
 114 #define AF_LINK         PF_LINK
 115 #define pseudo_AF_XTP   PF_XTP
 116 #define AF_COIP         PF_COIP
 117 #define AF_CNT          PF_CNT
 118 #define pseudo_AF_RTIP  PF_RTIP
 119 #define AF_IPX          PF_IPX
 120 #define AF_SIP          PF_SIP
 121 #define pseudo_AF_PIP   PF_PIP
 122 #define AF_INET6        PF_INET6
 123 #define AF_MAX          PF_MAX
 124
 125 /* Maximum queue length specifiable by listen.  */
 126 #define SOMAXCONN       128     /* 5 on the origional 4.4 BSD.  */
 127
 128 /* Get the definition of the macro to define the common sockaddr members.  */
 129 #include <bits/sockaddr.h>
 130
 131 /* Structure describing a generic socket address.  */
 132 struct sockaddr
 133   {
 134     __SOCKADDR_COMMON (sa_);    /* Common data: address family and length.  */
 135     char sa_data[14];           /* Address data.  */
 136   };
 137
 138
 139 /* Structure large enough to hold any socket address (with the historical
 140    exception of AF_UNIX).  We reserve 128 bytes.  */
 141 #if ULONG_MAX > 0xffffffff
 142 # define __ss_aligntype __uint64_t
 143 #else
 144 # define __ss_aligntype __uint32_t
 145 #endif
 146 #define _SS_SIZE        128
 147 #define _SS_PADSIZE     (_SS_SIZE - (2 * sizeof (__ss_aligntype)))
 148
 149 struct sockaddr_storage
 150   {
 151     __SOCKADDR_COMMON (ss_);    /* Address family, etc.  */
 152     __ss_aligntype __ss_align;  /* Force desired alignment.  */
 153     char __ss_padding[_SS_PADSIZE];
 154   };
 155
 156
 157 /* Bits in the FLAGS argument to `send', `recv', et al.  */
 158 enum
 159   {
 160     MSG_OOB             = 0x01, /* Process out-of-band data.  */
 161 #define MSG_OOB MSG_OOB
 162     MSG_PEEK            = 0x02, /* Peek at incoming messages.  */
 163 #define MSG_PEEK MSG_PEEK
 164     MSG_DONTROUTE       = 0x04, /* Don't use local routing.  */
 165 #define MSG_DONTROUTE MSG_DONTROUTE
 166     MSG_EOR             = 0x08, /* Data completes record.  */
 167 #define MSG_EOR MSG_EOR
 168     MSG_TRUNC           = 0x10, /* Data discarded before delivery.  */
 169 #define MSG_TRUNC MSG_TRUNC
 170     MSG_CTRUNC          = 0x20, /* Control data lost before delivery.  */
 171 #define MSG_CTRUNC MSG_CTRUNC
 172     MSG_WAITALL         = 0x40, /* Wait for full request or error.  */
 173 #define MSG_WAITALL MSG_WAITALL
 174     MSG_DONTWAIT        = 0x80, /* This message should be nonblocking.  */
 175 #define MSG_DONTWAIT MSG_DONTWAIT
 176     MSG_NOSIGNAL        = 0x0400        /* Do not generate SIGPIPE on EPIPE.  */
 177 #define MSG_NOSIGNAL MSG_NOSIGNAL
 178   };
 179
 180
 181 /* Structure describing messages sent by
 182    `sendmsg' and received by `recvmsg'.  */
 183 struct msghdr
 184   {
 185     void *msg_name;             /* Address to send to/receive from.  */
 186     socklen_t msg_namelen;      /* Length of address data.  */
 187
 188     struct iovec *msg_iov;      /* Vector of data to send/receive into.  */
 189     int msg_iovlen;             /* Number of elements in the vector.  */
 190
 191     void *msg_control;          /* Ancillary data (eg BSD filedesc passing). */
 192     socklen_t msg_controllen;   /* Ancillary data buffer length.  */
 193
 194     int msg_flags;              /* Flags in received message.  */
 195   };
 196
 197 /* Structure used for storage of ancillary data object information.  */
 198 struct cmsghdr
 199   {
 200     socklen_t cmsg_len;         /* Length of data in cmsg_data plus length
 201                                    of cmsghdr structure.  */
 202     int cmsg_level;             /* Originating protocol.  */
 203     int cmsg_type;              /* Protocol specific type.  */
 204 #if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
 205     __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
 206 #endif
 207   };
 208
 209 /* Ancillary data object manipulation macros.  */
 210 #if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
 211 # define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
 212 #else
 213 # define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))
 214 #endif
 215
 216 #define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg)
 217
 218 #define CMSG_FIRSTHDR(mhdr) \
 219   ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr)                 \
 220    ? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) NULL)
 221
 222 #define CMSG_ALIGN(len) (((len) + sizeof (size_t) - 1) \
 223                            & (size_t) ~(sizeof (size_t) - 1))
 224 #define CMSG_SPACE(len) (CMSG_ALIGN (len) \
 225                          + CMSG_ALIGN (sizeof (struct cmsghdr)))
 226 #define CMSG_LEN(len)   (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))
 227
 228 extern struct cmsghdr *__cmsg_nxthdr (struct msghdr *__mhdr,
 229                                       struct cmsghdr *__cmsg) __THROW;
 230 #ifdef __USE_EXTERN_INLINES
 231 # ifndef _EXTERN_INLINE
 232 #  define _EXTERN_INLINE __extern_inline
 233 # endif
 234 _EXTERN_INLINE struct cmsghdr *
 235 __NTH (__cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg))
 236 {
 237   if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr))
 238     /* The kernel header does this so there may be a reason.  */
 239     return 0;
 240
 241   __cmsg = (struct cmsghdr *) ((unsigned char *) __cmsg
 242                                + CMSG_ALIGN (__cmsg->cmsg_len));
 243   if ((unsigned char *) (__cmsg + 1) > ((unsigned char *) __mhdr->msg_control
 244                                         + __mhdr->msg_controllen)
 245       || ((unsigned char *) __cmsg + CMSG_ALIGN (__cmsg->cmsg_len)
 246           > ((unsigned char *) __mhdr->msg_control + __mhdr->msg_controllen)))
 247     /* No more entries.  */
 248     return 0;
 249   return __cmsg;
 250 }
 251 #endif  /* Use `extern inline'.  */
 252
 253 /* Socket level message types.  */
 254 enum
 255   {
 256     SCM_RIGHTS = 0x01,          /* Access rights (array of int).  */
 257 #define SCM_RIGHTS SCM_RIGHTS
 258     SCM_TIMESTAMP = 0x02,       /* Timestamp (struct timeval).  */
 259 #define SCM_TIMESTAMP SCM_TIMESTAMP
 260     SCM_CREDS = 0x03            /* Process creds (struct cmsgcred).  */
 261 #define SCM_CREDS SCM_CREDS
 262   };
 263
 264 /* Unfortunately, BSD practice dictates this structure be of fixed size.
 265    If there are more than CMGROUP_MAX groups, the list is truncated.
 266    (On GNU systems, the `cmcred_euid' field is just the first in the
 267    list of effective UIDs.)  */
 268 #define CMGROUP_MAX     16
 269
 270 /* Structure delivered by SCM_CREDS.  This describes the identity of the
 271    sender of the data simultaneously received on the socket.  By BSD
 272    convention, this is included only when a sender on a AF_LOCAL socket
 273    sends cmsg data of this type and size; the sender's structure is
 274    ignored, and the system fills in the various IDs of the sender process.  */
 275 struct cmsgcred
 276   {
 277     __pid_t cmcred_pid;
 278     __uid_t cmcred_uid;
 279     __uid_t cmcred_euid;
 280     __gid_t cmcred_gid;
 281     int cmcred_ngroups;
 282     __gid_t cmcred_groups[CMGROUP_MAX];
 283   };
 284
 285 /* Protocol number used to manipulate socket-level options
 286    with `getsockopt' and `setsockopt'.  */
 287 #define SOL_SOCKET      0xffff
 288
 289 /* Socket-level options for `getsockopt' and `setsockopt'.  */
 290 enum
 291   {
 292     SO_DEBUG = 0x0001,          /* Record debugging information.  */
 293 #define SO_DEBUG SO_DEBUG
 294     SO_ACCEPTCONN = 0x0002,     /* Accept connections on socket.  */
 295 #define SO_ACCEPTCONN SO_ACCEPTCONN
 296     SO_REUSEADDR = 0x0004,      /* Allow reuse of local addresses.  */
 297 #define SO_REUSEADDR SO_REUSEADDR
 298     SO_KEEPALIVE = 0x0008,      /* Keep connections alive and send
 299                                    SIGPIPE when they die.  */
 300 #define SO_KEEPALIVE SO_KEEPALIVE
 301     SO_DONTROUTE = 0x0010,      /* Don't do local routing.  */
 302 #define SO_DONTROUTE SO_DONTROUTE
 303     SO_BROADCAST = 0x0020,      /* Allow transmission of
 304                                    broadcast messages.  */
 305 #define SO_BROADCAST SO_BROADCAST
 306     SO_USELOOPBACK = 0x0040,    /* Use the software loopback to avoid
 307                                    hardware use when possible.  */
 308 #define SO_USELOOPBACK SO_USELOOPBACK
 309     SO_LINGER = 0x0080,         /* Block on close of a reliable
 310                                    socket to transmit pending data.  */
 311 #define SO_LINGER SO_LINGER
 312     SO_OOBINLINE = 0x0100,      /* Receive out-of-band data in-band.  */
 313 #define SO_OOBINLINE SO_OOBINLINE
 314     SO_REUSEPORT = 0x0200,      /* Allow local address and port reuse.  */
 315 #define SO_REUSEPORT SO_REUSEPORT
 316     SO_SNDBUF = 0x1001,         /* Send buffer size.  */
 317 #define SO_SNDBUF SO_SNDBUF
 318     SO_RCVBUF = 0x1002,         /* Receive buffer.  */
 319 #define SO_RCVBUF SO_RCVBUF
 320     SO_SNDLOWAT = 0x1003,       /* Send low-water mark.  */
 321 #define SO_SNDLOWAT SO_SNDLOWAT
 322     SO_RCVLOWAT = 0x1004,       /* Receive low-water mark.  */
 323 #define SO_RCVLOWAT SO_RCVLOWAT
 324     SO_SNDTIMEO = 0x1005,       /* Send timeout.  */
 325 #define SO_SNDTIMEO SO_SNDTIMEO
 326     SO_RCVTIMEO = 0x1006,       /* Receive timeout.  */
 327 #define SO_RCVTIMEO SO_RCVTIMEO
 328     SO_ERROR = 0x1007,          /* Get and clear error status.  */
 329 #define SO_ERROR SO_ERROR
 330     SO_STYLE = 0x1008,          /* Get socket connection style.  */
 331 #define SO_STYLE SO_STYLE
 332     SO_TYPE = SO_STYLE          /* Compatible name for SO_STYLE.  */
 333 #define SO_TYPE SO_TYPE
 334   };
 335
 336 /* Structure used to manipulate the SO_LINGER option.  */
 337 struct linger
 338   {
 339     int l_onoff;                /* Nonzero to linger on close.  */
 340     int l_linger;               /* Time to linger.  */
 341   };
 342
 343 #endif  /* bits/socket.h */