apr_network.m4

Apache 2.0.63 is the current stable version of the 2.0 series, and is recommended over any previous

#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETINET_TCP_H
#include <netinet/tcp.h>
#endif
#ifndef HAVE_SOCKLEN_T
typedef int socklen_t;
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
int main(void) {
    int listen_s, connected_s, client_s;
    int listen_port, rc;
    struct sockaddr_in sa;
    socklen_t sa_len;

    listen_s = socket(AF_INET, SOCK_STREAM, 0);
    if (listen_s < 0) {
        perror("socket");
        exit(1);
    }
    memset(&sa, 0, sizeof sa);
    sa.sin_family = AF_INET;
#ifdef BEOS
    sa.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
#endif
    /* leave port 0 to get ephemeral */
    rc = bind(listen_s, (struct sockaddr *)&sa, sizeof sa);
    if (rc < 0) {
        perror("bind for ephemeral port");
        exit(1);
    }
    /* find ephemeral port */
    sa_len = sizeof(sa);
    rc = getsockname(listen_s, (struct sockaddr *)&sa, &sa_len);
    if (rc < 0) {
        perror("getsockname");
        exit(1);
    }
    listen_port = sa.sin_port;
    rc = listen(listen_s, 5);
    if (rc < 0) {
        perror("listen");
        exit(1);
    }
    rc = fcntl(listen_s, F_SETFL, O_NONBLOCK);
    if (rc < 0) {
        perror("fcntl(F_SETFL)");
        exit(1);
    }
    client_s = socket(AF_INET, SOCK_STREAM, 0);
    if (client_s < 0) {
        perror("socket");
        exit(1);
    }
    memset(&sa, 0, sizeof sa);
    sa.sin_family = AF_INET;
    sa.sin_port   = listen_port;
#ifdef BEOS
    sa.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
#endif
    /* leave sin_addr all zeros to use loopback */
    rc = connect(client_s, (struct sockaddr *)&sa, sizeof sa);
    if (rc < 0) {
        perror("connect");
        exit(1);
    }
    sa_len = sizeof sa;
    connected_s = accept(listen_s, (struct sockaddr *)&sa, &sa_len);
    if (connected_s < 0) {
        perror("accept");
        exit(1);
    }
    rc = fcntl(connected_s, F_GETFL, 0);
    if (rc < 0) {
        perror("fcntl(F_GETFL)");
        exit(1);
    }
    if (!(rc & O_NONBLOCK)) {
        fprintf(stderr, "O_NONBLOCK is not set in the child.\n");
        exit(1);
    }
    return 0;
}
],[
    ac_cv_o_nonblock_inherited="yes"
],[
    ac_cv_o_nonblock_inherited="no"
],[
    ac_cv_o_nonblock_inherited="yes"
])])
if test "$ac_cv_o_nonblock_inherited" = "yes"; then
    o_nonblock_inherited=1
else
    o_nonblock_inherited=0
fi
])

dnl 
dnl check for socklen_t, fall back to unsigned int
dnl
AC_DEFUN(APR_CHECK_SOCKLEN_T,[
AC_CACHE_CHECK(for socklen_t, ac_cv_socklen_t,[
AC_TRY_COMPILE([
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
],[
socklen_t foo = (socklen_t) 0;
],[
    ac_cv_socklen_t=yes
],[
    ac_cv_socklen_t=no
])
])

if test "$ac_cv_socklen_t" = "yes"; then
  AC_DEFINE(HAVE_SOCKLEN_T, 1, [Whether you have socklen_t])
fi
])


AC_DEFUN(APR_CHECK_INET_ADDR,[
AC_CACHE_CHECK(for inet_addr, ac_cv_func_inet_addr,[
AC_TRY_COMPILE([
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
],[
inet_addr("127.0.0.1");
],[
    ac_cv_func_inet_addr=yes
],[
    ac_cv_func_inet_addr=no
])
])

if test "$ac_cv_func_inet_addr" = "yes"; then
  have_inet_addr=1
else
  have_inet_addr=0
fi
])


AC_DEFUN(APR_CHECK_INET_NETWORK,[
AC_CACHE_CHECK(for inet_network, ac_cv_func_inet_network,[
AC_TRY_COMPILE([
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
],[
inet_network("127.0.0.1");
],[
    ac_cv_func_inet_network=yes
],[
    ac_cv_func_inet_network=no
])
])

if test "$ac_cv_func_inet_network" = "yes"; then
  have_inet_network=1
else
  have_inet_network=0
fi
])


AC_DEFUN(APR_CHECK_SOCKADDR_IN6,[
AC_CACHE_CHECK(for sockaddr_in6, ac_cv_define_sockaddr_in6,[
AC_TRY_COMPILE([
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
],[
struct sockaddr_in6 sa;
],[
    ac_cv_define_sockaddr_in6=yes
],[
    ac_cv_define_sockaddr_in6=no
])
])

if test "$ac_cv_define_sockaddr_in6" = "yes"; then
  have_sockaddr_in6=1
else
  have_sockaddr_in6=0
fi
])

dnl
dnl APR_INADDR_NONE
dnl
dnl checks for missing INADDR_NONE macro
dnl
AC_DEFUN(APR_INADDR_NONE,[
  AC_CACHE_CHECK(whether system defines INADDR_NONE, ac_cv_inaddr_none,[
  AC_TRY_COMPILE([
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
],[
unsigned long foo = INADDR_NONE;
],[
    ac_cv_inaddr_none=yes
],[
    ac_cv_inaddr_none=no
])])
  if test "$ac_cv_inaddr_none" = "no"; then
    apr_inaddr_none="((unsigned int) 0xffffffff)"
  else
    apr_inaddr_none="INADDR_NONE"
  fi
])


dnl
dnl APR_H_ERRNO_COMPILE_CHECK
dnl
AC_DEFUN(APR_H_ERRNO_COMPILE_CHECK,[
  if test x$1 != x; then
    CPPFLAGS="-D$1 $CPPFLAGS"
  fi
  AC_TRY_COMPILE([
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
],[
int h_e = h_errno;
],[
  if test x$1 != x; then
    ac_cv_h_errno_cppflags="$1"
  else
    ac_cv_h_errno_cppflags=yes
  fi
],[
  ac_cv_h_errno_cppflags=no
])])


dnl
dnl APR_CHECK_SCTP
dnl
dnl check for presence of SCTP protocol support
dnl
AC_DEFUN([APR_CHECK_SCTP],
[
  AC_CACHE_CHECK([whether SCTP is supported], [apr_cv_sctp], [
  AC_TRY_RUN([
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETINET_SCTP_H
#include <netinet/sctp.h>
#endif
#ifdef HAVE_NETINET_SCTP_UIO_H
#include <netinet/sctp_uio.h>
#endif
#include <stdlib.h>
int main(void) {
    int s, opt = 1;
    if ((s = socket(AF_INET, SOCK_STREAM, IPPROTO_SCTP)) < 0)
       exit(1);
    if (setsockopt(s, IPPROTO_SCTP, SCTP_NODELAY, &opt, sizeof(int)) < 0)
       exit(2);
    exit(0);
}], [apr_cv_sctp=yes], [apr_cv_sctp=no], [apr_cv_sctp=no])])

if test "$apr_cv_sctp" = "yes"; then
    have_sctp=1
else
    have_sctp=0
fi
])

dnl
dnl APR_CHECK_H_ERRNO_FLAG
dnl
dnl checks which flags are necessary for <netdb.h> to define h_errno
dnl
AC_DEFUN(APR_CHECK_H_ERRNO_FLAG,[
  AC_MSG_CHECKING([for h_errno in netdb.h])
  AC_CACHE_VAL(ac_cv_h_errno_cppflags,[
    APR_H_ERRNO_COMPILE_CHECK
    if test "$ac_cv_h_errno_cppflags" = "no"; then
      ac_save="$CPPFLAGS"
      for flag in _XOPEN_SOURCE_EXTENDED; do
        APR_H_ERRNO_COMPILE_CHECK($flag)
        if test "$ac_cv_h_errno_cppflags" != "no"; then
          break
        fi
      done
      CPPFLAGS="$ac_save"
    fi
  ])
  if test "$ac_cv_h_errno_cppflags" != "no"; then
    if test "$ac_cv_h_errno_cppflags" != "yes"; then
      CPPFLAGS="-D$ac_cv_h_errno_cppflags $CPPFLAGS"
      AC_MSG_RESULT([yes, with -D$ac_cv_h_errno_cppflags])
    else
      AC_MSG_RESULT([$ac_cv_h_errno_cppflags])
    fi
  else
    AC_MSG_RESULT([$ac_cv_h_errno_cppflags])
  fi
])


AC_DEFUN(APR_EBCDIC,[
  AC_CACHE_CHECK([whether system uses EBCDIC],ac_cv_ebcdic,[
  AC_TRY_RUN( [
int main(void) { 
  return (unsigned char)'A' != (unsigned char)0xC1; 
} 
],[
  ac_cv_ebcdic="yes"
],[
  ac_cv_ebcdic="no"
],[
  ac_cv_ebcdic="no"
])])
  if test "$ac_cv_ebcdic" = "yes"; then
    apr_charset_ebcdic=1
  else
    apr_charset_ebcdic=0
  fi
  AC_SUBST(apr_charset_ebcdic)
])