sysdeps/unix/sysv/linux/bits/socket.h

   1 /* System-specific socket constants and types.  Linux version.
   2    Copyright (C) 1991, 1992, 1994-2001, 2004, 2006, 2007, 2008
   3    Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #ifndef __BITS_SOCKET_H
  22 #define __BITS_SOCKET_H
  23
  24 #ifndef _SYS_SOCKET_H
  25 # error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
  26 #endif
  27
  28 #define __need_size_t
  29 #include <stddef.h>
  30
  31 #include <sys/types.h>
  32
  33 /* Type for length arguments in socket calls.  */
  34 #ifndef __socklen_t_defined
  35 typedef __socklen_t socklen_t;
  36 # define __socklen_t_defined
  37 #endif
  38
  39 /* Types of sockets.  */
  40 enum __socket_type
  41 {
  42   SOCK_STREAM = 1,              /* Sequenced, reliable, connection-based
  43                                    byte streams.  */
  44 #define SOCK_STREAM SOCK_STREAM
  45   SOCK_DGRAM = 2,               /* Connectionless, unreliable datagrams
  46                                    of fixed maximum length.  */
  47 #define SOCK_DGRAM SOCK_DGRAM
  48   SOCK_RAW = 3,                 /* Raw protocol interface.  */
  49 #define SOCK_RAW SOCK_RAW
  50   SOCK_RDM = 4,                 /* Reliably-delivered messages.  */
  51 #define SOCK_RDM SOCK_RDM
  52   SOCK_SEQPACKET = 5,           /* Sequenced, reliable, connection-based,
  53                                    datagrams of fixed maximum length.  */
  54 #define SOCK_SEQPACKET SOCK_SEQPACKET
  55   SOCK_DCCP = 6,
  56 #define SOCK_DCCP SOCK_DCCP     /* Datagram Congestion Control Protocol.  */
  57   SOCK_PACKET = 10              /* Linux specific way of getting packets
  58                                    at the dev level.  For writing rarp and
  59                                    other similar things on the user level. */
  60 #define SOCK_PACKET SOCK_PACKET
  61 };
  62
  63 /* Protocol families.  */
  64 #define PF_UNSPEC       0       /* Unspecified.  */
  65 #define PF_LOCAL        1       /* Local to host (pipes and file-domain).  */
  66 #define PF_UNIX         PF_LOCAL /* POSIX name for PF_LOCAL.  */
  67 #define PF_FILE         PF_LOCAL /* Another non-standard name for PF_LOCAL.  */
  68 #define PF_INET         2       /* IP protocol family.  */
  69 #define PF_AX25         3       /* Amateur Radio AX.25.  */
  70 #define PF_IPX          4       /* Novell Internet Protocol.  */
  71 #define PF_APPLETALK    5       /* Appletalk DDP.  */
  72 #define PF_NETROM       6       /* Amateur radio NetROM.  */
  73 #define PF_BRIDGE       7       /* Multiprotocol bridge.  */
  74 #define PF_ATMPVC       8       /* ATM PVCs.  */
  75 #define PF_X25          9       /* Reserved for X.25 project.  */
  76 #define PF_INET6        10      /* IP version 6.  */
  77 #define PF_ROSE         11      /* Amateur Radio X.25 PLP.  */
  78 #define PF_DECnet       12      /* Reserved for DECnet project.  */
  79 #define PF_NETBEUI      13      /* Reserved for 802.2LLC project.  */
  80 #define PF_SECURITY     14      /* Security callback pseudo AF.  */
  81 #define PF_KEY          15      /* PF_KEY key management API.  */
  82 #define PF_NETLINK      16
  83 #define PF_ROUTE        PF_NETLINK /* Alias to emulate 4.4BSD.  */
  84 #define PF_PACKET       17      /* Packet family.  */
  85 #define PF_ASH          18      /* Ash.  */
  86 #define PF_ECONET       19      /* Acorn Econet.  */
  87 #define PF_ATMSVC       20      /* ATM SVCs.  */
  88 #define PF_SNA          22      /* Linux SNA Project */
  89 #define PF_IRDA         23      /* IRDA sockets.  */
  90 #define PF_PPPOX        24      /* PPPoX sockets.  */
  91 #define PF_WANPIPE      25      /* Wanpipe API sockets.  */
  92 #define PF_BLUETOOTH    31      /* Bluetooth sockets.  */
  93 #define PF_IUCV         32      /* IUCV sockets.  */
  94 #define PF_RXRPC        33      /* RxRPC sockets.  */
  95 #define PF_MAX          34      /* For now..  */
  96
  97 /* Address families.  */
  98 #define AF_UNSPEC       PF_UNSPEC
  99 #define AF_LOCAL        PF_LOCAL
 100 #define AF_UNIX         PF_UNIX
 101 #define AF_FILE         PF_FILE
 102 #define AF_INET         PF_INET
 103 #define AF_AX25         PF_AX25
 104 #define AF_IPX          PF_IPX
 105 #define AF_APPLETALK    PF_APPLETALK
 106 #define AF_NETROM       PF_NETROM
 107 #define AF_BRIDGE       PF_BRIDGE
 108 #define AF_ATMPVC       PF_ATMPVC
 109 #define AF_X25          PF_X25
 110 #define AF_INET6        PF_INET6
 111 #define AF_ROSE         PF_ROSE
 112 #define AF_DECnet       PF_DECnet
 113 #define AF_NETBEUI      PF_NETBEUI
 114 #define AF_SECURITY     PF_SECURITY
 115 #define AF_KEY          PF_KEY
 116 #define AF_NETLINK      PF_NETLINK
 117 #define AF_ROUTE        PF_ROUTE
 118 #define AF_PACKET       PF_PACKET
 119 #define AF_ASH          PF_ASH
 120 #define AF_ECONET       PF_ECONET
 121 #define AF_ATMSVC       PF_ATMSVC
 122 #define AF_SNA          PF_SNA
 123 #define AF_IRDA         PF_IRDA
 124 #define AF_PPPOX        PF_PPPOX
 125 #define AF_WANPIPE      PF_WANPIPE
 126 #define AF_BLUETOOTH    PF_BLUETOOTH
 127 #define AF_IUCV         PF_IUCV
 128 #define AF_RXRPC        PF_RXRPC
 129 #define AF_MAX          PF_MAX
 130
 131 /* Socket level values.  Others are defined in the appropriate headers.
 132
 133    XXX These definitions also should go into the appropriate headers as
 134    far as they are available.  */
 135 #define SOL_RAW         255
 136 #define SOL_DECNET      261
 137 #define SOL_X25         262
 138 #define SOL_PACKET      263
 139 #define SOL_ATM         264     /* ATM layer (cell level).  */
 140 #define SOL_AAL         265     /* ATM Adaption Layer (packet level).  */
 141 #define SOL_IRDA        266
 142
 143 /* Maximum queue length specifiable by listen.  */
 144 #define SOMAXCONN       128
 145
 146 /* Get the definition of the macro to define the common sockaddr members.  */
 147 #include <bits/sockaddr.h>
 148
 149 /* Structure describing a generic socket address.  */
 150 struct sockaddr
 151   {
 152     __SOCKADDR_COMMON (sa_);    /* Common data: address family and length.  */
 153     char sa_data[14];           /* Address data.  */
 154   };
 155
 156
 157 /* Structure large enough to hold any socket address (with the historical
 158    exception of AF_UNIX).  We reserve 128 bytes.  */
 159 #define __ss_aligntype  unsigned long int
 160 #define _SS_SIZE        128
 161 #define _SS_PADSIZE     (_SS_SIZE - (2 * sizeof (__ss_aligntype)))
 162
 163 struct sockaddr_storage
 164   {
 165     __SOCKADDR_COMMON (ss_);    /* Address family, etc.  */
 166     __ss_aligntype __ss_align;  /* Force desired alignment.  */
 167     char __ss_padding[_SS_PADSIZE];
 168   };
 169
 170
 171 /* Bits in the FLAGS argument to `send', `recv', et al.  */
 172 enum
 173   {
 174     MSG_OOB             = 0x01, /* Process out-of-band data.  */
 175 #define MSG_OOB         MSG_OOB
 176     MSG_PEEK            = 0x02, /* Peek at incoming messages.  */
 177 #define MSG_PEEK        MSG_PEEK
 178     MSG_DONTROUTE       = 0x04, /* Don't use local routing.  */
 179 #define MSG_DONTROUTE   MSG_DONTROUTE
 180 #ifdef __USE_GNU
 181     /* DECnet uses a different name.  */
 182     MSG_TRYHARD         = MSG_DONTROUTE,
 183 # define MSG_TRYHARD    MSG_DONTROUTE
 184 #endif
 185     MSG_CTRUNC          = 0x08, /* Control data lost before delivery.  */
 186 #define MSG_CTRUNC      MSG_CTRUNC
 187     MSG_PROXY           = 0x10, /* Supply or ask second address.  */
 188 #define MSG_PROXY       MSG_PROXY
 189     MSG_TRUNC           = 0x20,
 190 #define MSG_TRUNC       MSG_TRUNC
 191     MSG_DONTWAIT        = 0x40, /* Nonblocking IO.  */
 192 #define MSG_DONTWAIT    MSG_DONTWAIT
 193     MSG_EOR             = 0x80, /* End of record.  */
 194 #define MSG_EOR         MSG_EOR
 195     MSG_WAITALL         = 0x100, /* Wait for a full request.  */
 196 #define MSG_WAITALL     MSG_WAITALL
 197     MSG_FIN             = 0x200,
 198 #define MSG_FIN         MSG_FIN
 199     MSG_SYN             = 0x400,
 200 #define MSG_SYN         MSG_SYN
 201     MSG_CONFIRM         = 0x800, /* Confirm path validity.  */
 202 #define MSG_CONFIRM     MSG_CONFIRM
 203     MSG_RST             = 0x1000,
 204 #define MSG_RST         MSG_RST
 205     MSG_ERRQUEUE        = 0x2000, /* Fetch message from error queue.  */
 206 #define MSG_ERRQUEUE    MSG_ERRQUEUE
 207     MSG_NOSIGNAL        = 0x4000, /* Do not generate SIGPIPE.  */
 208 #define MSG_NOSIGNAL    MSG_NOSIGNAL
 209     MSG_MORE            = 0x8000,  /* Sender will send more.  */
 210 #define MSG_MORE        MSG_MORE
 211
 212     MSG_CMSG_CLOEXEC    = 0x40000000    /* Set close_on_exit for file
 213                                            descriptor received through
 214                                            SCM_RIGHTS.  */
 215 #define MSG_CMSG_CLOEXEC MSG_CMSG_CLOEXEC
 216   };
 217
 218
 219 /* Structure describing messages sent by
 220    `sendmsg' and received by `recvmsg'.  */
 221 struct msghdr
 222   {
 223     void *msg_name;             /* Address to send to/receive from.  */
 224     socklen_t msg_namelen;      /* Length of address data.  */
 225
 226     struct iovec *msg_iov;      /* Vector of data to send/receive into.  */
 227     size_t msg_iovlen;          /* Number of elements in the vector.  */
 228
 229     void *msg_control;          /* Ancillary data (eg BSD filedesc passing). */
 230     size_t msg_controllen;      /* Ancillary data buffer length.
 231                                    !! The type should be socklen_t but the
 232                                    definition of the kernel is incompatible
 233                                    with this.  */
 234
 235     int msg_flags;              /* Flags on received message.  */
 236   };
 237
 238 /* Structure used for storage of ancillary data object information.  */
 239 struct cmsghdr
 240   {
 241     size_t cmsg_len;            /* Length of data in cmsg_data plus length
 242                                    of cmsghdr structure.
 243                                    !! The type should be socklen_t but the
 244                                    definition of the kernel is incompatible
 245                                    with this.  */
 246     int cmsg_level;             /* Originating protocol.  */
 247     int cmsg_type;              /* Protocol specific type.  */
 248 #if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
 249     __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data.  */
 250 #endif
 251   };
 252
 253 /* Ancillary data object manipulation macros.  */
 254 #if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L
 255 # define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
 256 #else
 257 # define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))
 258 #endif
 259 #define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg)
 260 #define CMSG_FIRSTHDR(mhdr) \
 261   ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr)                 \
 262    ? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) 0)
 263 #define CMSG_ALIGN(len) (((len) + sizeof (size_t) - 1) \
 264                          & (size_t) ~(sizeof (size_t) - 1))
 265 #define CMSG_SPACE(len) (CMSG_ALIGN (len) \
 266                          + CMSG_ALIGN (sizeof (struct cmsghdr)))
 267 #define CMSG_LEN(len)   (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))
 268
 269 extern struct cmsghdr *__cmsg_nxthdr (struct msghdr *__mhdr,
 270                                       struct cmsghdr *__cmsg) __THROW;
 271 #ifdef __USE_EXTERN_INLINES
 272 # ifndef _EXTERN_INLINE
 273 #  define _EXTERN_INLINE __extern_inline
 274 # endif
 275 _EXTERN_INLINE struct cmsghdr *
 276 __NTH (__cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg))
 277 {
 278   if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr))
 279     /* The kernel header does this so there may be a reason.  */
 280     return 0;
 281
 282   __cmsg = (struct cmsghdr *) ((unsigned char *) __cmsg
 283                                + CMSG_ALIGN (__cmsg->cmsg_len));
 284   if ((unsigned char *) (__cmsg + 1) > ((unsigned char *) __mhdr->msg_control
 285                                         + __mhdr->msg_controllen)
 286       || ((unsigned char *) __cmsg + CMSG_ALIGN (__cmsg->cmsg_len)
 287           > ((unsigned char *) __mhdr->msg_control + __mhdr->msg_controllen)))
 288     /* No more entries.  */
 289     return 0;
 290   return __cmsg;
 291 }
 292 #endif  /* Use `extern inline'.  */
 293
 294 /* Socket level message types.  This must match the definitions in
 295    <linux/socket.h>.  */
 296 enum
 297   {
 298     SCM_RIGHTS = 0x01           /* Transfer file descriptors.  */
 299 #define SCM_RIGHTS SCM_RIGHTS
 300 #ifdef __USE_BSD
 301     , SCM_CREDENTIALS = 0x02    /* Credentials passing.  */
 302 # define SCM_CREDENTIALS SCM_CREDENTIALS
 303 #endif
 304   };
 305
 306 #ifdef __USE_GNU
 307 /* User visible structure for SCM_CREDENTIALS message */
 308 struct ucred
 309 {
 310   pid_t pid;                    /* PID of sending process.  */
 311   uid_t uid;                    /* UID of sending process.  */
 312   gid_t gid;                    /* GID of sending process.  */
 313 };
 314 #endif
 315
 316 /* Ugly workaround for unclean kernel headers.  */
 317 #if !defined __USE_MISC && !defined __USE_GNU
 318 # ifndef FIOGETOWN
 319 #  define __SYS_SOCKET_H_undef_FIOGETOWN
 320 # endif
 321 # ifndef FIOSETOWN
 322 #  define __SYS_SOCKET_H_undef_FIOSETOWN
 323 # endif
 324 # ifndef SIOCATMARK
 325 #  define __SYS_SOCKET_H_undef_SIOCATMARK
 326 # endif
 327 # ifndef SIOCGPGRP
 328 #  define __SYS_SOCKET_H_undef_SIOCGPGRP
 329 # endif
 330 # ifndef SIOCGSTAMP
 331 #  define __SYS_SOCKET_H_undef_SIOCGSTAMP
 332 # endif
 333 # ifndef SIOCGSTAMPNS
 334 #  define __SYS_SOCKET_H_undef_SIOCGSTAMPNS
 335 # endif
 336 # ifndef SIOCSPGRP
 337 #  define __SYS_SOCKET_H_undef_SIOCSPGRP
 338 # endif
 339 #endif
 340
 341 /* Get socket manipulation related informations from kernel headers.  */
 342 #include <asm/socket.h>
 343
 344 #if !defined __USE_MISC && !defined __USE_GNU
 345 # ifdef __SYS_SOCKET_H_undef_FIOGETOWN
 346 #  undef __SYS_SOCKET_H_undef_FIOGETOWN
 347 #  undef FIOGETOWN
 348 # endif
 349 # ifdef __SYS_SOCKET_H_undef_FIOSETOWN
 350 #  undef __SYS_SOCKET_H_undef_FIOSETOWN
 351 #  undef FIOSETOWN
 352 # endif
 353 # ifdef __SYS_SOCKET_H_undef_SIOCATMARK
 354 #  undef __SYS_SOCKET_H_undef_SIOCATMARK
 355 #  undef SIOCATMARK
 356 # endif
 357 # ifdef __SYS_SOCKET_H_undef_SIOCGPGRP
 358 #  undef __SYS_SOCKET_H_undef_SIOCGPGRP
 359 #  undef SIOCGPGRP
 360 # endif
 361 # ifdef __SYS_SOCKET_H_undef_SIOCGSTAMP
 362 #  undef __SYS_SOCKET_H_undef_SIOCGSTAMP
 363 #  undef SIOCGSTAMP
 364 # endif
 365 # ifdef __SYS_SOCKET_H_undef_SIOCGSTAMPNS
 366 #  undef __SYS_SOCKET_H_undef_SIOCGSTAMPNS
 367 #  undef SIOCGSTAMPNS
 368 # endif
 369 # ifdef __SYS_SOCKET_H_undef_SIOCSPGRP
 370 #  undef __SYS_SOCKET_H_undef_SIOCSPGRP
 371 #  undef SIOCSPGRP
 372 # endif
 373 #endif
 374
 375 /* Structure used to manipulate the SO_LINGER option.  */
 376 struct linger
 377   {
 378     int l_onoff;                /* Nonzero to linger on close.  */
 379     int l_linger;               /* Time to linger.  */
 380   };
 381
 382 #endif  /* bits/socket.h */