gl/sys_socket.in.h

   1 /* Provide a sys/socket header file for systems lacking it (read: MinGW)
   2    and for systems where it is incomplete.
   3    Copyright (C) 2005-2009 Free Software Foundation, Inc.
   4    Written by Simon Josefsson.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3, or (at your option)
   9    any later version.
  10
  11    This program 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
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software Foundation,
  18    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  19
  20 /* This file is supposed to be used on platforms that lack <sys/socket.h>,
  21    on platforms where <sys/socket.h> cannot be included standalone, and on
  22    platforms where <sys/socket.h> does not provide all necessary definitions.
  23    It is intended to provide definitions and prototypes needed by an
  24    application.  */
  25
  26 #ifndef _GL_SYS_SOCKET_H
  27
  28 #if @HAVE_SYS_SOCKET_H@
  29
  30 # if __GNUC__ >= 3
  31 @PRAGMA_SYSTEM_HEADER@
  32 # endif
  33
  34 /* On many platforms, <sys/socket.h> assumes prior inclusion of
  35    <sys/types.h>.  */
  36 # include <sys/types.h>
  37
  38 /* The include_next requires a split double-inclusion guard.  */
  39 # @INCLUDE_NEXT@ @NEXT_SYS_SOCKET_H@
  40
  41 #endif
  42
  43 #ifndef _GL_SYS_SOCKET_H
  44 #define _GL_SYS_SOCKET_H
  45
  46 #if !@HAVE_SA_FAMILY_T@
  47 typedef unsigned short  sa_family_t;
  48 #endif
  49
  50 #if !@HAVE_STRUCT_SOCKADDR_STORAGE@
  51 # include <alignof.h>
  52 /* Code taken from glibc sysdeps/unix/sysv/linux/bits/socket.h on
  53    2009-05-08, licensed under LGPLv2.1+, plus portability fixes. */
  54 # define __ss_aligntype unsigned long int
  55 # define _SS_SIZE 256
  56 # define _SS_PADSIZE \
  57     (_SS_SIZE - ((sizeof (sa_family_t) >= alignof (__ss_aligntype)      \
  58                   ? sizeof (sa_family_t)                                \
  59                   : alignof (__ss_aligntype))                           \
  60                  + sizeof (__ss_aligntype)))
  61
  62 struct sockaddr_storage
  63 {
  64   sa_family_t ss_family;      /* Address family, etc.  */
  65   __ss_aligntype __ss_align;  /* Force desired alignment.  */
  66   char __ss_padding[_SS_PADSIZE];
  67 };
  68 #endif
  69
  70 #if @HAVE_SYS_SOCKET_H@
  71
  72 /* A platform that has <sys/socket.h>.  */
  73
  74 /* For shutdown().  */
  75 # if !defined SHUT_RD
  76 #  define SHUT_RD 0
  77 # endif
  78 # if !defined SHUT_WR
  79 #  define SHUT_WR 1
  80 # endif
  81 # if !defined SHUT_RDWR
  82 #  define SHUT_RDWR 2
  83 # endif
  84
  85 #else
  86
  87 # ifdef __CYGWIN__
  88 #  error "Cygwin does have a sys/socket.h, doesn't it?!?"
  89 # endif
  90
  91 /* A platform that lacks <sys/socket.h>.
  92
  93    Currently only MinGW is supported.  See the gnulib manual regarding
  94    Windows sockets.  MinGW has the header files winsock2.h and
  95    ws2tcpip.h that declare the sys/socket.h definitions we need.  Note
  96    that you can influence which definitions you get by setting the
  97    WINVER symbol before including these two files.  For example,
  98    getaddrinfo is only available if _WIN32_WINNT >= 0x0501 (that
  99    symbol is set indiriectly through WINVER).  You can set this by
 100    adding AC_DEFINE(WINVER, 0x0501) to configure.ac.  Note that your
 101    code may not run on older Windows releases then.  My Windows 2000
 102    box was not able to run the code, for example.  The situation is
 103    slightly confusing because:
 104    http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/getaddrinfo_2.asp
 105    suggests that getaddrinfo should be available on all Windows
 106    releases. */
 107
 108
 109 # if @HAVE_WINSOCK2_H@
 110 #  include <winsock2.h>
 111 # endif
 112 # if @HAVE_WS2TCPIP_H@
 113 #  include <ws2tcpip.h>
 114 # endif
 115
 116 /* For shutdown(). */
 117 # if !defined SHUT_RD && defined SD_RECEIVE
 118 #  define SHUT_RD SD_RECEIVE
 119 # endif
 120 # if !defined SHUT_WR && defined SD_SEND
 121 #  define SHUT_WR SD_SEND
 122 # endif
 123 # if !defined SHUT_RDWR && defined SD_BOTH
 124 #  define SHUT_RDWR SD_BOTH
 125 # endif
 126
 127 /* The definition of GL_LINK_WARNING is copied here.  */
 128
 129 # if @HAVE_WINSOCK2_H@
 130 /* Include headers needed by the emulation code.  */
 131 #  include <sys/types.h>
 132 #  include <io.h>
 133
 134 typedef int socklen_t;
 135
 136 # endif
 137
 138 # ifdef __cplusplus
 139 extern "C" {
 140 # endif
 141
 142 # if @HAVE_WINSOCK2_H@
 143
 144 /* Re-define FD_ISSET to avoid a WSA call while we are not using
 145    network sockets.  */
 146 static inline int
 147 rpl_fd_isset (SOCKET fd, fd_set * set)
 148 {
 149   u_int i;
 150   if (set == NULL)
 151     return 0;
 152
 153   for (i = 0; i < set->fd_count; i++)
 154     if (set->fd_array[i] == fd)
 155       return 1;
 156
 157   return 0;
 158 }
 159
 160 #  undef FD_ISSET
 161 #  define FD_ISSET(fd, set) rpl_fd_isset(fd, set)
 162
 163 # endif
 164
 165 /* Wrap everything else to use libc file descriptors for sockets.  */
 166
 167 # if @HAVE_WINSOCK2_H@ && !defined _GL_UNISTD_H
 168 #  undef close
 169 #  define close close_used_without_including_unistd_h
 170 # endif
 171
 172 # if @HAVE_WINSOCK2_H@ && !defined _GL_UNISTD_H
 173 #  undef gethostname
 174 #  define gethostname gethostname_used_without_including_unistd_h
 175 # endif
 176
 177 # if @GNULIB_SOCKET@
 178 #  if @HAVE_WINSOCK2_H@
 179 #   undef socket
 180 #   define socket               rpl_socket
 181 extern int rpl_socket (int, int, int protocol);
 182 #  endif
 183 # elif @HAVE_WINSOCK2_H@
 184 #  undef socket
 185 #  define socket socket_used_without_requesting_gnulib_module_socket
 186 # elif defined GNULIB_POSIXCHECK
 187 #  undef socket
 188 #  define socket(d,t,p) \
 189      (GL_LINK_WARNING ("socket is not always POSIX compliant - " \
 190                        "use gnulib module socket for portability"), \
 191       socket (d, t, p))
 192 # endif
 193
 194 # if @GNULIB_CONNECT@
 195 #  if @HAVE_WINSOCK2_H@
 196 #   undef connect
 197 #   define connect              rpl_connect
 198 extern int rpl_connect (int, struct sockaddr *, int);
 199 #  endif
 200 # elif @HAVE_WINSOCK2_H@
 201 #  undef connect
 202 #  define connect socket_used_without_requesting_gnulib_module_connect
 203 # elif defined GNULIB_POSIXCHECK
 204 #  undef connect
 205 #  define connect(s,a,l) \
 206      (GL_LINK_WARNING ("connect is not always POSIX compliant - " \
 207                        "use gnulib module connect for portability"), \
 208       connect (s, a, l))
 209 # endif
 210
 211 # if @GNULIB_ACCEPT@
 212 #  if @HAVE_WINSOCK2_H@
 213 #   undef accept
 214 #   define accept               rpl_accept
 215 extern int rpl_accept (int, struct sockaddr *, int *);
 216 #  endif
 217 # elif @HAVE_WINSOCK2_H@
 218 #  undef accept
 219 #  define accept accept_used_without_requesting_gnulib_module_accept
 220 # elif defined GNULIB_POSIXCHECK
 221 #  undef accept
 222 #  define accept(s,a,l) \
 223      (GL_LINK_WARNING ("accept is not always POSIX compliant - " \
 224                        "use gnulib module accept for portability"), \
 225       accept (s, a, l))
 226 # endif
 227
 228 # if @GNULIB_BIND@
 229 #  if @HAVE_WINSOCK2_H@
 230 #   undef bind
 231 #   define bind                 rpl_bind
 232 extern int rpl_bind (int, struct sockaddr *, int);
 233 #  endif
 234 # elif @HAVE_WINSOCK2_H@
 235 #  undef bind
 236 #  define bind bind_used_without_requesting_gnulib_module_bind
 237 # elif defined GNULIB_POSIXCHECK
 238 #  undef bind
 239 #  define bind(s,a,l) \
 240      (GL_LINK_WARNING ("bind is not always POSIX compliant - " \
 241                        "use gnulib module bind for portability"), \
 242       bind (s, a, l))
 243 # endif
 244
 245 # if @GNULIB_GETPEERNAME@
 246 #  if @HAVE_WINSOCK2_H@
 247 #   undef getpeername
 248 #   define getpeername          rpl_getpeername
 249 extern int rpl_getpeername (int, struct sockaddr *, int *);
 250 #  endif
 251 # elif @HAVE_WINSOCK2_H@
 252 #  undef getpeername
 253 #  define getpeername getpeername_used_without_requesting_gnulib_module_getpeername
 254 # elif defined GNULIB_POSIXCHECK
 255 #  undef getpeername
 256 #  define getpeername(s,a,l) \
 257      (GL_LINK_WARNING ("getpeername is not always POSIX compliant - " \
 258                        "use gnulib module getpeername for portability"), \
 259       getpeername (s, a, l))
 260 # endif
 261
 262 # if @GNULIB_GETSOCKNAME@
 263 #  if @HAVE_WINSOCK2_H@
 264 #   undef getsockname
 265 #   define getsockname          rpl_getsockname
 266 extern int rpl_getsockname (int, struct sockaddr *, int *);
 267 #  endif
 268 # elif @HAVE_WINSOCK2_H@
 269 #  undef getsockname
 270 #  define getsockname getsockname_used_without_requesting_gnulib_module_getsockname
 271 # elif defined GNULIB_POSIXCHECK
 272 #  undef getsockname
 273 #  define getsockname(s,a,l) \
 274      (GL_LINK_WARNING ("getsockname is not always POSIX compliant - " \
 275                        "use gnulib module getsockname for portability"), \
 276       getsockname (s, a, l))
 277 # endif
 278
 279 # if @GNULIB_GETSOCKOPT@
 280 #  if @HAVE_WINSOCK2_H@
 281 #   undef getsockopt
 282 #   define getsockopt           rpl_getsockopt
 283 extern int rpl_getsockopt (int, int, int, void *, socklen_t *);
 284 #  endif
 285 # elif @HAVE_WINSOCK2_H@
 286 #  undef getsockopt
 287 #  define getsockopt getsockopt_used_without_requesting_gnulib_module_getsockopt
 288 # elif defined GNULIB_POSIXCHECK
 289 #  undef getsockopt
 290 #  define getsockopt(s,lvl,o,v,l) \
 291      (GL_LINK_WARNING ("getsockopt is not always POSIX compliant - " \
 292                        "use gnulib module getsockopt for portability"), \
 293       getsockopt (s, lvl, o, v, l))
 294 # endif
 295
 296 # if @GNULIB_LISTEN@
 297 #  if @HAVE_WINSOCK2_H@
 298 #   undef listen
 299 #   define listen               rpl_listen
 300 extern int rpl_listen (int, int);
 301 #  endif
 302 # elif @HAVE_WINSOCK2_H@
 303 #  undef listen
 304 #  define listen listen_used_without_requesting_gnulib_module_listen
 305 # elif defined GNULIB_POSIXCHECK
 306 #  undef listen
 307 #  define listen(s,b) \
 308      (GL_LINK_WARNING ("listen is not always POSIX compliant - " \
 309                        "use gnulib module listen for portability"), \
 310       listen (s, b))
 311 # endif
 312
 313 # if @GNULIB_RECV@
 314 #  if @HAVE_WINSOCK2_H@
 315 #   undef recv
 316 #   define recv                 rpl_recv
 317 extern int rpl_recv (int, void *, int, int);
 318 #  endif
 319 # elif @HAVE_WINSOCK2_H@
 320 #  undef recv
 321 #  define recv recv_used_without_requesting_gnulib_module_recv
 322 # elif defined GNULIB_POSIXCHECK
 323 #  undef recv
 324 #  define recv(s,b,n,f) \
 325      (GL_LINK_WARNING ("recv is not always POSIX compliant - " \
 326                        "use gnulib module recv for portability"), \
 327       recv (s, b, n, f))
 328 # endif
 329
 330 # if @GNULIB_SEND@
 331 #  if @HAVE_WINSOCK2_H@
 332 #   undef send
 333 #   define send                 rpl_send
 334 extern int rpl_send (int, const void *, int, int);
 335 #  endif
 336 # elif @HAVE_WINSOCK2_H@
 337 #  undef send
 338 #  define send send_used_without_requesting_gnulib_module_send
 339 # elif defined GNULIB_POSIXCHECK
 340 #  undef send
 341 #  define send(s,b,n,f) \
 342      (GL_LINK_WARNING ("send is not always POSIX compliant - " \
 343                        "use gnulib module send for portability"), \
 344       send (s, b, n, f))
 345 # endif
 346
 347 # if @GNULIB_RECVFROM@
 348 #  if @HAVE_WINSOCK2_H@
 349 #   undef recvfrom
 350 #   define recvfrom             rpl_recvfrom
 351 extern int rpl_recvfrom (int, void *, int, int, struct sockaddr *, int *);
 352 #  endif
 353 # elif @HAVE_WINSOCK2_H@
 354 #  undef recvfrom
 355 #  define recvfrom recvfrom_used_without_requesting_gnulib_module_recvfrom
 356 # elif defined GNULIB_POSIXCHECK
 357 #  undef recvfrom
 358 #  define recvfrom(s,b,n,f,a,l) \
 359      (GL_LINK_WARNING ("recvfrom is not always POSIX compliant - " \
 360                        "use gnulib module recvfrom for portability"), \
 361       recvfrom (s, b, n, f, a, l))
 362 # endif
 363
 364 # if @GNULIB_SENDTO@
 365 #  if @HAVE_WINSOCK2_H@
 366 #   undef sendto
 367 #   define sendto               rpl_sendto
 368 extern int rpl_sendto (int, const void *, int, int, struct sockaddr *, int);
 369 #  endif
 370 # elif @HAVE_WINSOCK2_H@
 371 #  undef sendto
 372 #  define sendto sendto_used_without_requesting_gnulib_module_sendto
 373 # elif defined GNULIB_POSIXCHECK
 374 #  undef sendto
 375 #  define sendto(s,b,n,f,a,l) \
 376      (GL_LINK_WARNING ("sendto is not always POSIX compliant - " \
 377                        "use gnulib module sendto for portability"), \
 378       sendto (s, b, n, f, a, l))
 379 # endif
 380
 381 # if @GNULIB_SETSOCKOPT@
 382 #  if @HAVE_WINSOCK2_H@
 383 #   undef setsockopt
 384 #   define setsockopt           rpl_setsockopt
 385 extern int rpl_setsockopt (int, int, int, const void *, socklen_t);
 386 #  endif
 387 # elif @HAVE_WINSOCK2_H@
 388 #  undef setsockopt
 389 #  define setsockopt setsockopt_used_without_requesting_gnulib_module_setsockopt
 390 # elif defined GNULIB_POSIXCHECK
 391 #  undef setsockopt
 392 #  define setsockopt(s,lvl,o,v,l) \
 393      (GL_LINK_WARNING ("setsockopt is not always POSIX compliant - " \
 394                        "use gnulib module setsockopt for portability"), \
 395       setsockopt (s, lvl, o, v, l))
 396 # endif
 397
 398 # if @GNULIB_SHUTDOWN@
 399 #  if @HAVE_WINSOCK2_H@
 400 #   undef shutdown
 401 #   define shutdown             rpl_shutdown
 402 extern int rpl_shutdown (int, int);
 403 #  endif
 404 # elif @HAVE_WINSOCK2_H@
 405 #  undef shutdown
 406 #  define shutdown shutdown_used_without_requesting_gnulib_module_shutdown
 407 # elif defined GNULIB_POSIXCHECK
 408 #  undef shutdown
 409 #  define shutdown(s,h) \
 410      (GL_LINK_WARNING ("shutdown is not always POSIX compliant - " \
 411                        "use gnulib module shutdown for portability"), \
 412       shutdown (s, h))
 413 # endif
 414
 415 # if @HAVE_WINSOCK2_H@
 416 #  undef select
 417 #  define select                select_used_without_including_sys_select_h
 418 # endif
 419
 420 # ifdef __cplusplus
 421 }
 422 # endif
 423
 424 #endif /* HAVE_SYS_SOCKET_H */
 425
 426 #ifdef __cplusplus
 427 extern "C" {
 428 #endif
 429
 430 #if @GNULIB_ACCEPT4@
 431 /* Accept a connection on a socket, with specific opening flags.
 432    The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
 433    and O_TEXT, O_BINARY (defined in "binary-io.h").
 434    See also the Linux man page at
 435    <http://www.kernel.org/doc/man-pages/online/pages/man2/accept4.2.html>.  */
 436 # if @HAVE_ACCEPT4@
 437 #  define accept4 rpl_accept4
 438 # endif
 439 extern int accept4 (int sockfd, struct sockaddr *addr, socklen_t *addrlen,
 440                     int flags);
 441 #elif defined GNULIB_POSIXCHECK
 442 # undef accept4
 443 # define accept4(s,a,l,f) \
 444     (GL_LINK_WARNING ("accept4 is unportable - " \
 445                       "use gnulib module accept4 for portability"), \
 446      accept4 (s, a, l, f))
 447 #endif
 448
 449 #ifdef __cplusplus
 450 }
 451 #endif
 452
 453 #endif /* _GL_SYS_SOCKET_H */
 454 #endif /* _GL_SYS_SOCKET_H */