| 1 | # sys_socket_h.m4 serial 29
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| 2 | dnl Copyright (C) 2005-2022 Free Software Foundation, Inc.
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| 3 | dnl This file is free software; the Free Software Foundation
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| 4 | dnl gives unlimited permission to copy and/or distribute it,
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| 5 | dnl with or without modifications, as long as this notice is preserved.
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| 6 |
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| 7 | dnl From Simon Josefsson.
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| 8 |
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| 9 | AC_DEFUN_ONCE([gl_SYS_SOCKET_H],
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| 10 | [
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| 11 | AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
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| 12 | AC_REQUIRE([AC_CANONICAL_HOST])
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| 13 |
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| 14 | dnl On OSF/1, the functions recv(), send(), recvfrom(), sendto() have
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| 15 | dnl old-style declarations (with return type 'int' instead of 'ssize_t')
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| 16 | dnl unless _POSIX_PII_SOCKET is defined.
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| 17 | case "$host_os" in
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| 18 | osf*)
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| 19 | AC_DEFINE([_POSIX_PII_SOCKET], [1],
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| 20 | [Define to 1 in order to get the POSIX compatible declarations
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| 21 | of socket functions.])
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| 22 | ;;
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| 23 | esac
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| 24 |
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| 25 | GL_GENERATE_SYS_SOCKET_H=false
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| 26 | AC_CACHE_CHECK([whether <sys/socket.h> is self-contained],
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| 27 | [gl_cv_header_sys_socket_h_selfcontained],
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| 28 | [
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| 29 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]], [[]])],
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| 30 | [gl_cv_header_sys_socket_h_selfcontained=yes],
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| 31 | [gl_cv_header_sys_socket_h_selfcontained=no])
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| 32 | ])
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| 33 | if test $gl_cv_header_sys_socket_h_selfcontained = yes; then
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| 34 | dnl If the shutdown function exists, <sys/socket.h> should define
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| 35 | dnl SHUT_RD, SHUT_WR, SHUT_RDWR.
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| 36 | AC_CHECK_FUNCS([shutdown])
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| 37 | if test $ac_cv_func_shutdown = yes; then
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| 38 | AC_CACHE_CHECK([whether <sys/socket.h> defines the SHUT_* macros],
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| 39 | [gl_cv_header_sys_socket_h_shut],
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| 40 | [
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| 41 | AC_COMPILE_IFELSE(
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| 42 | [AC_LANG_PROGRAM([[#include <sys/socket.h>]],
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| 43 | [[int a[] = { SHUT_RD, SHUT_WR, SHUT_RDWR };]])],
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| 44 | [gl_cv_header_sys_socket_h_shut=yes],
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| 45 | [gl_cv_header_sys_socket_h_shut=no])
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| 46 | ])
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| 47 | if test $gl_cv_header_sys_socket_h_shut = no; then
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| 48 | GL_GENERATE_SYS_SOCKET_H=true
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| 49 | fi
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| 50 | fi
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| 51 | fi
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| 52 | # We need to check for ws2tcpip.h now.
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| 53 | gl_PREREQ_SYS_H_SOCKET
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| 54 | AC_CHECK_TYPES([struct sockaddr_storage, sa_family_t],,,[
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| 55 | /* sys/types.h is not needed according to POSIX, but the
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| 56 | sys/socket.h in i386-unknown-freebsd4.10 and
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| 57 | powerpc-apple-darwin5.5 required it. */
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| 58 | #include <sys/types.h>
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| 59 | #ifdef HAVE_SYS_SOCKET_H
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| 60 | #include <sys/socket.h>
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| 61 | #endif
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| 62 | #ifdef HAVE_WS2TCPIP_H
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| 63 | #include <ws2tcpip.h>
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| 64 | #endif
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| 65 | ])
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| 66 | if test $ac_cv_type_struct_sockaddr_storage = no; then
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| 67 | HAVE_STRUCT_SOCKADDR_STORAGE=0
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| 68 | fi
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| 69 | if test $ac_cv_type_sa_family_t = no; then
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| 70 | HAVE_SA_FAMILY_T=0
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| 71 | fi
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| 72 | if test $ac_cv_type_struct_sockaddr_storage != no; then
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| 73 | AC_CHECK_MEMBERS([struct sockaddr_storage.ss_family],
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| 74 | [],
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| 75 | [HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=0],
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| 76 | [#include <sys/types.h>
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| 77 | #ifdef HAVE_SYS_SOCKET_H
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| 78 | #include <sys/socket.h>
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| 79 | #endif
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| 80 | #ifdef HAVE_WS2TCPIP_H
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| 81 | #include <ws2tcpip.h>
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| 82 | #endif
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| 83 | ])
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| 84 | fi
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| 85 | if test $HAVE_STRUCT_SOCKADDR_STORAGE = 0 || test $HAVE_SA_FAMILY_T = 0 \
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| 86 | || test $HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = 0; then
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| 87 | GL_GENERATE_SYS_SOCKET_H=true
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| 88 | fi
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| 89 | gl_PREREQ_SYS_H_WINSOCK2
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| 90 |
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| 91 | dnl Check for declarations of anything we want to poison if the
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| 92 | dnl corresponding gnulib module is not in use.
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| 93 | gl_WARN_ON_USE_PREPARE([[
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| 94 | /* Some systems require prerequisite headers. */
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| 95 | #include <sys/types.h>
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| 96 | #include <sys/socket.h>
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| 97 | ]], [socket connect accept bind getpeername getsockname getsockopt
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| 98 | listen recv send recvfrom sendto setsockopt shutdown accept4])
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| 99 |
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| 100 | AC_REQUIRE([AC_C_RESTRICT])
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| 101 | ])
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| 102 |
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| 103 | AC_DEFUN([gl_PREREQ_SYS_H_SOCKET],
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| 104 | [
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| 105 | dnl Check prerequisites of the <sys/socket.h> replacement.
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| 106 | AC_REQUIRE([gl_CHECK_SOCKET_HEADERS])
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| 107 | gl_CHECK_NEXT_HEADERS([sys/socket.h])
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| 108 | if test $ac_cv_header_sys_socket_h = yes; then
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| 109 | HAVE_SYS_SOCKET_H=1
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| 110 | else
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| 111 | HAVE_SYS_SOCKET_H=0
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| 112 | fi
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| 113 | AC_SUBST([HAVE_SYS_SOCKET_H])
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| 114 | gl_PREREQ_SYS_H_WS2TCPIP
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| 115 | ])
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| 116 |
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| 117 | # Common prerequisites of the <sys/socket.h> replacement and of the
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| 118 | # <sys/select.h> replacement.
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| 119 | # Sets and substitutes HAVE_WINSOCK2_H.
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| 120 | AC_DEFUN([gl_PREREQ_SYS_H_WINSOCK2],
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| 121 | [
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| 122 | m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])])
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| 123 | m4_ifdef([gl_SYS_IOCTL_H_DEFAULTS], [AC_REQUIRE([gl_SYS_IOCTL_H_DEFAULTS])])
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| 124 | AC_CHECK_HEADERS_ONCE([sys/socket.h])
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| 125 | if test $ac_cv_header_sys_socket_h != yes; then
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| 126 | dnl We cannot use AC_CHECK_HEADERS_ONCE here, because that would make
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| 127 | dnl the check for those headers unconditional; yet cygwin reports
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| 128 | dnl that the headers are present but cannot be compiled (since on
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| 129 | dnl cygwin, all socket information should come from sys/socket.h).
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| 130 | AC_CHECK_HEADERS([winsock2.h])
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| 131 | fi
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| 132 | if test "$ac_cv_header_winsock2_h" = yes; then
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| 133 | HAVE_WINSOCK2_H=1
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| 134 | UNISTD_H_HAVE_WINSOCK2_H=1
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| 135 | SYS_IOCTL_H_HAVE_WINSOCK2_H=1
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| 136 | else
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| 137 | HAVE_WINSOCK2_H=0
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| 138 | fi
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| 139 | AC_SUBST([HAVE_WINSOCK2_H])
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| 140 | ])
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| 141 |
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| 142 | # Common prerequisites of the <sys/socket.h> replacement and of the
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| 143 | # <arpa/inet.h> replacement.
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| 144 | # Sets and substitutes HAVE_WS2TCPIP_H.
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| 145 | AC_DEFUN([gl_PREREQ_SYS_H_WS2TCPIP],
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| 146 | [
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| 147 | AC_REQUIRE([gl_CHECK_SOCKET_HEADERS])
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| 148 | if test $ac_cv_header_sys_socket_h = yes; then
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| 149 | HAVE_WS2TCPIP_H=0
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| 150 | else
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| 151 | if test $ac_cv_header_ws2tcpip_h = yes; then
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| 152 | HAVE_WS2TCPIP_H=1
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| 153 | else
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| 154 | HAVE_WS2TCPIP_H=0
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| 155 | fi
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| 156 | fi
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| 157 | AC_SUBST([HAVE_WS2TCPIP_H])
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| 158 | ])
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| 159 |
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| 160 | # gl_SYS_SOCKET_MODULE_INDICATOR([modulename])
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| 161 | # sets the shell variable that indicates the presence of the given module
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| 162 | # to a C preprocessor expression that will evaluate to 1.
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| 163 | # This macro invocation must not occur in macros that are AC_REQUIREd.
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| 164 | AC_DEFUN([gl_SYS_SOCKET_MODULE_INDICATOR],
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| 165 | [
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| 166 | dnl Ensure to expand the default settings once only.
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| 167 | gl_SYS_SOCKET_H_REQUIRE_DEFAULTS
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| 168 | gl_MODULE_INDICATOR_SET_VARIABLE([$1])
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| 169 | dnl Define it also as a C macro, for the benefit of the unit tests.
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| 170 | gl_MODULE_INDICATOR_FOR_TESTS([$1])
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| 171 | ])
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| 172 |
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| 173 | # Initializes the default values for AC_SUBSTed shell variables.
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| 174 | # This macro must not be AC_REQUIREd. It must only be invoked, and only
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| 175 | # outside of macros or in macros that are not AC_REQUIREd.
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| 176 | AC_DEFUN([gl_SYS_SOCKET_H_REQUIRE_DEFAULTS],
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| 177 | [
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| 178 | m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_SOCKET_H_MODULE_INDICATOR_DEFAULTS], [
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| 179 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SOCKET])
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| 180 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_CONNECT])
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| 181 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ACCEPT])
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| 182 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_BIND])
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| 183 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETPEERNAME])
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| 184 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETSOCKNAME])
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| 185 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETSOCKOPT])
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| 186 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_LISTEN])
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| 187 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_RECV])
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| 188 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SEND])
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| 189 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_RECVFROM])
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| 190 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SENDTO])
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| 191 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SETSOCKOPT])
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| 192 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_SHUTDOWN])
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| 193 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ACCEPT4])
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| 194 | ])
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| 195 | m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_SOCKET_H_MODULE_INDICATOR_DEFAULTS])
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| 196 | AC_REQUIRE([gl_SYS_SOCKET_H_DEFAULTS])
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| 197 | ])
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| 198 |
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| 199 | AC_DEFUN([gl_SYS_SOCKET_H_DEFAULTS],
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| 200 | [
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| 201 | HAVE_STRUCT_SOCKADDR_STORAGE=1; AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE])
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| 202 | HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY=1;
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| 203 | AC_SUBST([HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY])
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| 204 | HAVE_SA_FAMILY_T=1; AC_SUBST([HAVE_SA_FAMILY_T])
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| 205 | HAVE_ACCEPT4=1; AC_SUBST([HAVE_ACCEPT4])
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| 206 | ])
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