1 /* Provide a sys/socket header file for systems lacking it (read: MinGW)
2 and for systems where it is incomplete.
3 Copyright (C) 2005-2023 Free Software Foundation, Inc.
4 Written by Simon Josefsson.
5
6 This file is free software: you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
10
11 This file 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 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with this program. If not, see <https://www.gnu.org/licenses/>. */
18
19 /* This file is supposed to be used on platforms that lack <sys/socket.h>,
20 on platforms where <sys/socket.h> cannot be included standalone, and on
21 platforms where <sys/socket.h> does not provide all necessary definitions.
22 It is intended to provide definitions and prototypes needed by an
23 application. */
24
25 #if __GNUC__ >= 3
26 @PRAGMA_SYSTEM_HEADER@
27 #endif
28 @PRAGMA_COLUMNS@
29
30 #if defined _GL_ALREADY_INCLUDING_SYS_SOCKET_H
31 /* Special invocation convention:
32 - On Cygwin 1.5.x we have a sequence of nested includes
33 <sys/socket.h> -> <cygwin/socket.h> -> <asm/socket.h> -> <cygwin/if.h>,
34 and the latter includes <sys/socket.h>. In this situation, the functions
35 are not yet declared, therefore we cannot provide the C++ aliases. */
36
37 #@INCLUDE_NEXT@ @NEXT_SYS_SOCKET_H@
38
39 #else
40 /* Normal invocation convention. */
41
42 #ifndef _@GUARD_PREFIX@_SYS_SOCKET_H
43
44 #if @HAVE_SYS_SOCKET_H@
45
46 # define _GL_ALREADY_INCLUDING_SYS_SOCKET_H
47
48 /* On many platforms, <sys/socket.h> assumes prior inclusion of
49 <sys/types.h>. */
50 # include <sys/types.h>
51
52 /* On FreeBSD 6.4, <sys/socket.h> defines some macros that assume that NULL
53 is defined. */
54 # include <stddef.h>
55
56 /* The include_next requires a split double-inclusion guard. */
57 # @INCLUDE_NEXT@ @NEXT_SYS_SOCKET_H@
58
59 # undef _GL_ALREADY_INCLUDING_SYS_SOCKET_H
60
61 #endif
62
63 #ifndef _@GUARD_PREFIX@_SYS_SOCKET_H
64 #define _@GUARD_PREFIX@_SYS_SOCKET_H
65
66 /* This file uses _GL_INLINE_HEADER_BEGIN, _GL_INLINE, GNULIB_POSIXCHECK,
67 HAVE_RAW_DECL_*, alignof. */
68 #if !_GL_CONFIG_H_INCLUDED
69 #error "Please include config.h first."
70 #endif
71
72 _GL_INLINE_HEADER_BEGIN
73 #ifndef _GL_SYS_SOCKET_INLINE
74 # define _GL_SYS_SOCKET_INLINE _GL_INLINE
75 #endif
76
77 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
78
79 /* The definition of _GL_ARG_NONNULL is copied here. */
80
81 /* The definition of _GL_WARN_ON_USE is copied here. */
82
83 #if !@HAVE_SA_FAMILY_T@
84 # if !GNULIB_defined_sa_family_t
85 /* On OS/2 kLIBC, sa_family_t is unsigned char unless TCPV40HDRS is defined. */
86 # if !defined __KLIBC__ || defined TCPV40HDRS
87 typedef unsigned short sa_family_t;
88 # else
89 typedef unsigned char sa_family_t;
90 # endif
91 # define GNULIB_defined_sa_family_t 1
92 # endif
93 #endif
94
95 #if @HAVE_STRUCT_SOCKADDR_STORAGE@
96 /* Make the 'struct sockaddr_storage' field 'ss_family' visible on AIX 7.1. */
97 # if !@HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY@
98 # ifndef ss_family
99 # define ss_family __ss_family
100 # endif
101 # endif
102 #else
103 /* Code taken from glibc sysdeps/unix/sysv/linux/bits/socket.h on
104 2009-05-08, licensed under LGPLv2.1+, plus portability fixes. */
105 # define __ss_aligntype unsigned long int
106 # define _SS_SIZE 256
107 # define _SS_PADSIZE \
108 (_SS_SIZE - ((sizeof (sa_family_t) >= alignof (__ss_aligntype) \
109 ? sizeof (sa_family_t) \
110 : alignof (__ss_aligntype)) \
111 + sizeof (__ss_aligntype)))
112
113 # if !GNULIB_defined_struct_sockaddr_storage
114 struct sockaddr_storage
115 {
116 sa_family_t ss_family; /* Address family, etc. */
117 __ss_aligntype __ss_align; /* Force desired alignment. */
118 char __ss_padding[_SS_PADSIZE];
119 };
120 # define GNULIB_defined_struct_sockaddr_storage 1
121 # endif
122
123 #endif
124
125 /* Get struct iovec. */
126 /* But avoid namespace pollution on glibc systems. */
127 #if ! defined __GLIBC__
128 # include <sys/uio.h>
129 #endif
130
131 #if @HAVE_SYS_SOCKET_H@
132
133 /* A platform that has <sys/socket.h>. */
134
135 /* For shutdown(). */
136 # if !defined SHUT_RD
137 # define SHUT_RD 0
138 # endif
139 # if !defined SHUT_WR
140 # define SHUT_WR 1
141 # endif
142 # if !defined SHUT_RDWR
143 # define SHUT_RDWR 2
144 # endif
145
146 # ifdef __VMS /* OpenVMS */
147 # ifndef CMSG_SPACE
148 # define CMSG_SPACE(length) _CMSG_SPACE(length)
149 # endif
150 # ifndef CMSG_LEN
151 # define CMSG_LEN(length) _CMSG_LEN(length)
152 # endif
153 # endif
154
155 #else
156
157 # ifdef __CYGWIN__
158 # error "Cygwin does have a sys/socket.h, doesn't it?!?"
159 # endif
160
161 /* A platform that lacks <sys/socket.h>.
162
163 Currently only MinGW is supported. See the gnulib manual regarding
164 Windows sockets. MinGW has the header files winsock2.h and
165 ws2tcpip.h that declare the sys/socket.h definitions we need. Note
166 that you can influence which definitions you get by setting the
167 WINVER symbol before including these two files. For example,
168 getaddrinfo is only available if _WIN32_WINNT >= 0x0501 (that
169 symbol is set indirectly through WINVER). You can set this by
170 adding AC_DEFINE(WINVER, 0x0501) to configure.ac. Note that your
171 code may not run on older Windows releases then. My Windows 2000
172 box was not able to run the code, for example. The situation is
173 slightly confusing because
174 <https://docs.microsoft.com/en-us/windows/desktop/api/ws2tcpip/nf-ws2tcpip-getaddrinfo>
175 suggests that getaddrinfo should be available on all Windows
176 releases. */
177
178 # if @HAVE_WINSOCK2_H@
179 # include <winsock2.h>
180 # endif
181 # if @HAVE_WS2TCPIP_H@
182 # include <ws2tcpip.h>
183 # endif
184
185 /* For shutdown(). */
186 # if !defined SHUT_RD && defined SD_RECEIVE
187 # define SHUT_RD SD_RECEIVE
188 # endif
189 # if !defined SHUT_WR && defined SD_SEND
190 # define SHUT_WR SD_SEND
191 # endif
192 # if !defined SHUT_RDWR && defined SD_BOTH
193 # define SHUT_RDWR SD_BOTH
194 # endif
195
196 # if @HAVE_WINSOCK2_H@
197 /* Include headers needed by the emulation code. */
198 # include <sys/types.h>
199 # include <io.h>
200 /* If these headers don't define socklen_t, <config.h> does. */
201 # endif
202
203 /* Rudimentary 'struct msghdr'; this works as long as you don't try to
204 access msg_control or msg_controllen. */
205 struct msghdr {
206 void *msg_name;
207 socklen_t msg_namelen;
208 struct iovec *msg_iov;
209 int msg_iovlen;
210 int msg_flags;
211 };
212
213 #endif
214
215 /* Ensure SO_REUSEPORT is defined. */
216 /* For the subtle differences between SO_REUSEPORT and SO_REUSEADDR, see
217 https://stackoverflow.com/questions/14388706/socket-options-so-reuseaddr-and-so-reuseport-how-do-they-differ-do-they-mean-t
218 and https://lwn.net/Articles/542629/
219 */
220 #ifndef SO_REUSEPORT
221 # define SO_REUSEPORT SO_REUSEADDR
222 #endif
223
224 /* Fix some definitions from <winsock2.h>. */
225
226 #if @HAVE_WINSOCK2_H@
227
228 # if !GNULIB_defined_rpl_fd_isset
229
230 /* Re-define FD_ISSET to avoid a WSA call while we are not using
231 network sockets. */
232 _GL_SYS_SOCKET_INLINE int
233 rpl_fd_isset (SOCKET fd, fd_set * set)
234 {
235 u_int i;
236 if (set == NULL)
237 return 0;
238
239 for (i = 0; i < set->fd_count; i++)
240 if (set->fd_array[i] == fd)
241 return 1;
242
243 return 0;
244 }
245
246 # define GNULIB_defined_rpl_fd_isset 1
247 # endif
248
249 # undef FD_ISSET
250 # define FD_ISSET(fd, set) rpl_fd_isset(fd, set)
251
252 #endif
253
254 /* Hide some function declarations from <winsock2.h>. */
255
256 #if @HAVE_WINSOCK2_H@
257 # if !defined _@GUARD_PREFIX@_UNISTD_H
258 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
259 # undef close
260 # define close close_used_without_including_unistd_h
261 # elif !defined __clang__
262 _GL_WARN_ON_USE (close,
263 "close() used without including <unistd.h>");
264 # endif
265 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
266 # undef gethostname
267 # define gethostname gethostname_used_without_including_unistd_h
268 # else
269 _GL_WARN_ON_USE (gethostname,
270 "gethostname() used without including <unistd.h>");
271 # endif
272 # endif
273 # if !defined _@GUARD_PREFIX@_SYS_SELECT_H
274 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
275 # undef select
276 # define select select_used_without_including_sys_select_h
277 # else
278 _GL_WARN_ON_USE (select,
279 "select() used without including <sys/select.h>");
280 # endif
281 # endif
282 #endif
283
284 /* Wrap everything else to use libc file descriptors for sockets. */
285
286 #if @GNULIB_SOCKET@
287 # if @HAVE_WINSOCK2_H@
288 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
289 # undef socket
290 # define socket rpl_socket
291 # endif
292 _GL_FUNCDECL_RPL (socket, int, (int domain, int type, int protocol));
293 _GL_CXXALIAS_RPL (socket, int, (int domain, int type, int protocol));
294 # else
295 _GL_CXXALIAS_SYS (socket, int, (int domain, int type, int protocol));
296 # endif
297 _GL_CXXALIASWARN (socket);
298 #elif @HAVE_WINSOCK2_H@
299 # undef socket
300 # define socket socket_used_without_requesting_gnulib_module_socket
301 #elif defined GNULIB_POSIXCHECK
302 # undef socket
303 # if HAVE_RAW_DECL_SOCKET
304 _GL_WARN_ON_USE (socket, "socket is not always POSIX compliant - "
305 "use gnulib module socket for portability");
306 # endif
307 #endif
308
309 #if @GNULIB_CONNECT@
310 # if @HAVE_WINSOCK2_H@
311 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
312 # undef connect
313 # define connect rpl_connect
314 # endif
315 _GL_FUNCDECL_RPL (connect, int,
316 (int fd, const struct sockaddr *addr, socklen_t addrlen)
317 _GL_ARG_NONNULL ((2)));
318 _GL_CXXALIAS_RPL (connect, int,
319 (int fd, const struct sockaddr *addr, socklen_t addrlen));
320 # else
321 /* Need to cast, because on NonStop Kernel, the third parameter is
322 size_t addrlen. */
323 _GL_CXXALIAS_SYS_CAST (connect, int,
324 (int fd,
325 const struct sockaddr *addr, socklen_t addrlen));
326 # endif
327 _GL_CXXALIASWARN (connect);
328 #elif @HAVE_WINSOCK2_H@
329 # undef connect
330 # define connect socket_used_without_requesting_gnulib_module_connect
331 #elif defined GNULIB_POSIXCHECK
332 # undef connect
333 # if HAVE_RAW_DECL_CONNECT
334 _GL_WARN_ON_USE (connect, "connect is not always POSIX compliant - "
335 "use gnulib module connect for portability");
336 # endif
337 #endif
338
339 #if @GNULIB_ACCEPT@
340 # if @HAVE_WINSOCK2_H@
341 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
342 # undef accept
343 # define accept rpl_accept
344 # endif
345 _GL_FUNCDECL_RPL (accept, int,
346 (int fd,
347 struct sockaddr *restrict addr,
348 socklen_t *restrict addrlen));
349 _GL_CXXALIAS_RPL (accept, int,
350 (int fd,
351 struct sockaddr *restrict addr,
352 socklen_t *restrict addrlen));
353 # else
354 /* Need to cast, because on Solaris 10 systems, the third parameter is
355 void *addrlen. */
356 _GL_CXXALIAS_SYS_CAST (accept, int,
357 (int fd,
358 struct sockaddr *restrict addr,
359 socklen_t *restrict addrlen));
360 # endif
361 # if __GLIBC__ >= 2
362 _GL_CXXALIASWARN (accept);
363 # endif
364 #elif @HAVE_WINSOCK2_H@
365 # undef accept
366 # define accept accept_used_without_requesting_gnulib_module_accept
367 #elif defined GNULIB_POSIXCHECK
368 # undef accept
369 # if HAVE_RAW_DECL_ACCEPT
370 _GL_WARN_ON_USE (accept, "accept is not always POSIX compliant - "
371 "use gnulib module accept for portability");
372 # endif
373 #endif
374
375 #if @GNULIB_BIND@
376 # if @HAVE_WINSOCK2_H@
377 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
378 # undef bind
379 # define bind rpl_bind
380 # endif
381 _GL_FUNCDECL_RPL (bind, int,
382 (int fd, const struct sockaddr *addr, socklen_t addrlen)
383 _GL_ARG_NONNULL ((2)));
384 _GL_CXXALIAS_RPL (bind, int,
385 (int fd, const struct sockaddr *addr, socklen_t addrlen));
386 # else
387 /* Need to cast, because on NonStop Kernel, the third parameter is
388 size_t addrlen. */
389 _GL_CXXALIAS_SYS_CAST (bind, int,
390 (int fd,
391 const struct sockaddr *addr, socklen_t addrlen));
392 # endif
393 _GL_CXXALIASWARN (bind);
394 #elif @HAVE_WINSOCK2_H@
395 # undef bind
396 # define bind bind_used_without_requesting_gnulib_module_bind
397 #elif defined GNULIB_POSIXCHECK
398 # undef bind
399 # if HAVE_RAW_DECL_BIND
400 _GL_WARN_ON_USE (bind, "bind is not always POSIX compliant - "
401 "use gnulib module bind for portability");
402 # endif
403 #endif
404
405 #if @GNULIB_GETPEERNAME@
406 # if @HAVE_WINSOCK2_H@
407 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
408 # undef getpeername
409 # define getpeername rpl_getpeername
410 # endif
411 _GL_FUNCDECL_RPL (getpeername, int,
412 (int fd, struct sockaddr *restrict addr,
413 socklen_t *restrict addrlen)
414 _GL_ARG_NONNULL ((2, 3)));
415 _GL_CXXALIAS_RPL (getpeername, int,
416 (int fd, struct sockaddr *restrict addr,
417 socklen_t *restrict addrlen));
418 # else
419 /* Need to cast, because on Solaris 10 systems, the third parameter is
420 void *addrlen. */
421 _GL_CXXALIAS_SYS_CAST (getpeername, int,
422 (int fd, struct sockaddr *restrict addr,
423 socklen_t *restrict addrlen));
424 # endif
425 # if __GLIBC__ >= 2
426 _GL_CXXALIASWARN (getpeername);
427 # endif
428 #elif @HAVE_WINSOCK2_H@
429 # undef getpeername
430 # define getpeername getpeername_used_without_requesting_gnulib_module_getpeername
431 #elif defined GNULIB_POSIXCHECK
432 # undef getpeername
433 # if HAVE_RAW_DECL_GETPEERNAME
434 _GL_WARN_ON_USE (getpeername, "getpeername is not always POSIX compliant - "
435 "use gnulib module getpeername for portability");
436 # endif
437 #endif
438
439 #if @GNULIB_GETSOCKNAME@
440 # if @HAVE_WINSOCK2_H@
441 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
442 # undef getsockname
443 # define getsockname rpl_getsockname
444 # endif
445 _GL_FUNCDECL_RPL (getsockname, int,
446 (int fd, struct sockaddr *restrict addr,
447 socklen_t *restrict addrlen)
448 _GL_ARG_NONNULL ((2, 3)));
449 _GL_CXXALIAS_RPL (getsockname, int,
450 (int fd, struct sockaddr *restrict addr,
451 socklen_t *restrict addrlen));
452 # else
453 /* Need to cast, because on Solaris 10 systems, the third parameter is
454 void *addrlen. */
455 _GL_CXXALIAS_SYS_CAST (getsockname, int,
456 (int fd, struct sockaddr *restrict addr,
457 socklen_t *restrict addrlen));
458 # endif
459 # if __GLIBC__ >= 2
460 _GL_CXXALIASWARN (getsockname);
461 # endif
462 #elif @HAVE_WINSOCK2_H@
463 # undef getsockname
464 # define getsockname getsockname_used_without_requesting_gnulib_module_getsockname
465 #elif defined GNULIB_POSIXCHECK
466 # undef getsockname
467 # if HAVE_RAW_DECL_GETSOCKNAME
468 _GL_WARN_ON_USE (getsockname, "getsockname is not always POSIX compliant - "
469 "use gnulib module getsockname for portability");
470 # endif
471 #endif
472
473 #if @GNULIB_GETSOCKOPT@
474 # if @HAVE_WINSOCK2_H@
475 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
476 # undef getsockopt
477 # define getsockopt rpl_getsockopt
478 # endif
479 _GL_FUNCDECL_RPL (getsockopt, int,
480 (int fd, int level, int optname,
481 void *restrict optval, socklen_t *restrict optlen)
482 _GL_ARG_NONNULL ((4, 5)));
483 _GL_CXXALIAS_RPL (getsockopt, int,
484 (int fd, int level, int optname,
485 void *restrict optval, socklen_t *restrict optlen));
486 # else
487 /* Need to cast, because on Solaris 10 systems, the fifth parameter is
488 void *optlen. */
489 _GL_CXXALIAS_SYS_CAST (getsockopt, int,
490 (int fd, int level, int optname,
491 void *restrict optval, socklen_t *restrict optlen));
492 # endif
493 _GL_CXXALIASWARN (getsockopt);
494 #elif @HAVE_WINSOCK2_H@
495 # undef getsockopt
496 # define getsockopt getsockopt_used_without_requesting_gnulib_module_getsockopt
497 #elif defined GNULIB_POSIXCHECK
498 # undef getsockopt
499 # if HAVE_RAW_DECL_GETSOCKOPT
500 _GL_WARN_ON_USE (getsockopt, "getsockopt is not always POSIX compliant - "
501 "use gnulib module getsockopt for portability");
502 # endif
503 #endif
504
505 #if @GNULIB_LISTEN@
506 # if @HAVE_WINSOCK2_H@
507 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
508 # undef listen
509 # define listen rpl_listen
510 # endif
511 _GL_FUNCDECL_RPL (listen, int, (int fd, int backlog));
512 _GL_CXXALIAS_RPL (listen, int, (int fd, int backlog));
513 # else
514 _GL_CXXALIAS_SYS (listen, int, (int fd, int backlog));
515 # endif
516 _GL_CXXALIASWARN (listen);
517 #elif @HAVE_WINSOCK2_H@
518 # undef listen
519 # define listen listen_used_without_requesting_gnulib_module_listen
520 #elif defined GNULIB_POSIXCHECK
521 # undef listen
522 # if HAVE_RAW_DECL_LISTEN
523 _GL_WARN_ON_USE (listen, "listen is not always POSIX compliant - "
524 "use gnulib module listen for portability");
525 # endif
526 #endif
527
528 #if @GNULIB_RECV@
529 # if @HAVE_WINSOCK2_H@
530 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
531 # undef recv
532 # define recv rpl_recv
533 # endif
534 _GL_FUNCDECL_RPL (recv, ssize_t, (int fd, void *buf, size_t len, int flags)
535 _GL_ARG_NONNULL ((2)));
536 _GL_CXXALIAS_RPL (recv, ssize_t, (int fd, void *buf, size_t len, int flags));
537 # else
538 /* Need to cast, because on HP-UX 11.31 the return type may be
539 int,
540 depending on compiler options. */
541 _GL_CXXALIAS_SYS_CAST (recv, ssize_t, (int fd, void *buf, size_t len, int flags));
542 # endif
543 _GL_CXXALIASWARN (recv);
544 #elif @HAVE_WINSOCK2_H@
545 # undef recv
546 # define recv recv_used_without_requesting_gnulib_module_recv
547 #elif defined GNULIB_POSIXCHECK
548 # undef recv
549 # if HAVE_RAW_DECL_RECV
550 _GL_WARN_ON_USE (recv, "recv is not always POSIX compliant - "
551 "use gnulib module recv for portability");
552 # endif
553 #endif
554
555 #if @GNULIB_SEND@
556 # if @HAVE_WINSOCK2_H@
557 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
558 # undef send
559 # define send rpl_send
560 # endif
561 _GL_FUNCDECL_RPL (send, ssize_t,
562 (int fd, const void *buf, size_t len, int flags)
563 _GL_ARG_NONNULL ((2)));
564 _GL_CXXALIAS_RPL (send, ssize_t,
565 (int fd, const void *buf, size_t len, int flags));
566 # else
567 /* Need to cast, because on HP-UX 11.31 the return type may be
568 int,
569 depending on compiler options. */
570 _GL_CXXALIAS_SYS_CAST (send, ssize_t,
571 (int fd, const void *buf, size_t len, int flags));
572 # endif
573 _GL_CXXALIASWARN (send);
574 #elif @HAVE_WINSOCK2_H@
575 # undef send
576 # define send send_used_without_requesting_gnulib_module_send
577 #elif defined GNULIB_POSIXCHECK
578 # undef send
579 # if HAVE_RAW_DECL_SEND
580 _GL_WARN_ON_USE (send, "send is not always POSIX compliant - "
581 "use gnulib module send for portability");
582 # endif
583 #endif
584
585 #if @GNULIB_RECVFROM@
586 # if @HAVE_WINSOCK2_H@
587 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
588 # undef recvfrom
589 # define recvfrom rpl_recvfrom
590 # endif
591 _GL_FUNCDECL_RPL (recvfrom, ssize_t,
592 (int fd, void *restrict buf, size_t len, int flags,
593 struct sockaddr *restrict from,
594 socklen_t *restrict fromlen)
595 _GL_ARG_NONNULL ((2)));
596 _GL_CXXALIAS_RPL (recvfrom, ssize_t,
597 (int fd, void *restrict buf, size_t len, int flags,
598 struct sockaddr *restrict from,
599 socklen_t *restrict fromlen));
600 # else
601 /* Need to cast, because on Solaris 10 systems, the sixth parameter is
602 void *fromlen. */
603 _GL_CXXALIAS_SYS_CAST (recvfrom, ssize_t,
604 (int fd, void *restrict buf, size_t len, int flags,
605 struct sockaddr *restrict from,
606 socklen_t *restrict fromlen));
607 # endif
608 # if __GLIBC__ >= 2
609 _GL_CXXALIASWARN (recvfrom);
610 # endif
611 #elif @HAVE_WINSOCK2_H@
612 # undef recvfrom
613 # define recvfrom recvfrom_used_without_requesting_gnulib_module_recvfrom
614 #elif defined GNULIB_POSIXCHECK
615 # undef recvfrom
616 # if HAVE_RAW_DECL_RECVFROM
617 _GL_WARN_ON_USE (recvfrom, "recvfrom is not always POSIX compliant - "
618 "use gnulib module recvfrom for portability");
619 # endif
620 #endif
621
622 #if @GNULIB_SENDTO@
623 # if @HAVE_WINSOCK2_H@
624 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
625 # undef sendto
626 # define sendto rpl_sendto
627 # endif
628 _GL_FUNCDECL_RPL (sendto, ssize_t,
629 (int fd, const void *buf, size_t len, int flags,
630 const struct sockaddr *to, socklen_t tolen)
631 _GL_ARG_NONNULL ((2)));
632 _GL_CXXALIAS_RPL (sendto, ssize_t,
633 (int fd, const void *buf, size_t len, int flags,
634 const struct sockaddr *to, socklen_t tolen));
635 # else
636 /* Need to cast, because on NonStop Kernel, the sixth parameter is
637 size_t tolen. */
638 _GL_CXXALIAS_SYS_CAST (sendto, ssize_t,
639 (int fd, const void *buf, size_t len, int flags,
640 const struct sockaddr *to, socklen_t tolen));
641 # endif
642 _GL_CXXALIASWARN (sendto);
643 #elif @HAVE_WINSOCK2_H@
644 # undef sendto
645 # define sendto sendto_used_without_requesting_gnulib_module_sendto
646 #elif defined GNULIB_POSIXCHECK
647 # undef sendto
648 # if HAVE_RAW_DECL_SENDTO
649 _GL_WARN_ON_USE (sendto, "sendto is not always POSIX compliant - "
650 "use gnulib module sendto for portability");
651 # endif
652 #endif
653
654 #if @GNULIB_SETSOCKOPT@
655 # if @HAVE_WINSOCK2_H@
656 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
657 # undef setsockopt
658 # define setsockopt rpl_setsockopt
659 # endif
660 _GL_FUNCDECL_RPL (setsockopt, int, (int fd, int level, int optname,
661 const void * optval, socklen_t optlen)
662 _GL_ARG_NONNULL ((4)));
663 _GL_CXXALIAS_RPL (setsockopt, int, (int fd, int level, int optname,
664 const void * optval, socklen_t optlen));
665 # else
666 /* Need to cast, because on NonStop Kernel, the fifth parameter is
667 size_t optlen. */
668 _GL_CXXALIAS_SYS_CAST (setsockopt, int,
669 (int fd, int level, int optname,
670 const void * optval, socklen_t optlen));
671 # endif
672 _GL_CXXALIASWARN (setsockopt);
673 #elif @HAVE_WINSOCK2_H@
674 # undef setsockopt
675 # define setsockopt setsockopt_used_without_requesting_gnulib_module_setsockopt
676 #elif defined GNULIB_POSIXCHECK
677 # undef setsockopt
678 # if HAVE_RAW_DECL_SETSOCKOPT
679 _GL_WARN_ON_USE (setsockopt, "setsockopt is not always POSIX compliant - "
680 "use gnulib module setsockopt for portability");
681 # endif
682 #endif
683
684 #if @GNULIB_SHUTDOWN@
685 # if @HAVE_WINSOCK2_H@
686 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
687 # undef shutdown
688 # define shutdown rpl_shutdown
689 # endif
690 _GL_FUNCDECL_RPL (shutdown, int, (int fd, int how));
691 _GL_CXXALIAS_RPL (shutdown, int, (int fd, int how));
692 # else
693 _GL_CXXALIAS_SYS (shutdown, int, (int fd, int how));
694 # endif
695 _GL_CXXALIASWARN (shutdown);
696 #elif @HAVE_WINSOCK2_H@
697 # undef shutdown
698 # define shutdown shutdown_used_without_requesting_gnulib_module_shutdown
699 #elif defined GNULIB_POSIXCHECK
700 # undef shutdown
701 # if HAVE_RAW_DECL_SHUTDOWN
702 _GL_WARN_ON_USE (shutdown, "shutdown is not always POSIX compliant - "
703 "use gnulib module shutdown for portability");
704 # endif
705 #endif
706
707 #if @GNULIB_ACCEPT4@
708 /* Accept a connection on a socket, with specific opening flags.
709 The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
710 and O_TEXT, O_BINARY (defined in "binary-io.h").
711 See also the Linux man page at
712 <https://www.kernel.org/doc/man-pages/online/pages/man2/accept4.2.html>. */
713 # if @HAVE_ACCEPT4@
714 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
715 # define accept4 rpl_accept4
716 # endif
717 _GL_FUNCDECL_RPL (accept4, int,
718 (int sockfd, struct sockaddr *addr, socklen_t *addrlen,
719 int flags));
720 _GL_CXXALIAS_RPL (accept4, int,
721 (int sockfd, struct sockaddr *addr, socklen_t *addrlen,
722 int flags));
723 # else
724 _GL_FUNCDECL_SYS (accept4, int,
725 (int sockfd, struct sockaddr *addr, socklen_t *addrlen,
726 int flags));
727 _GL_CXXALIAS_SYS (accept4, int,
728 (int sockfd, struct sockaddr *addr, socklen_t *addrlen,
729 int flags));
730 # endif
731 _GL_CXXALIASWARN (accept4);
732 #elif defined GNULIB_POSIXCHECK
733 # undef accept4
734 # if HAVE_RAW_DECL_ACCEPT4
735 _GL_WARN_ON_USE (accept4, "accept4 is unportable - "
736 "use gnulib module accept4 for portability");
737 # endif
738 #endif
739
740 _GL_INLINE_HEADER_END
741
742 #endif /* _@GUARD_PREFIX@_SYS_SOCKET_H */
743 #endif /* _@GUARD_PREFIX@_SYS_SOCKET_H */
744 #endif