dnl Macros that test for specific features.
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dnl
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dnl it under the terms of the GNU General Public License as published by
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dnl
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dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl GNU General Public License for more details.
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dnl along with this program; if not, write to the Free Software
dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
dnl 02111-1307, USA.
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dnl permission to copy, distribute and modify the configure scripts that
dnl are the output of Autoconf.  You need not follow the terms of the GNU
dnl General Public License when using or distributing such scripts, even
dnl though portions of the text of Autoconf appear in them.  The GNU
dnl General Public License (GPL) does govern all other use of the material
dnl that constitutes the Autoconf program.
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dnl (in certain cases, depending on the input) into the output of
dnl Autoconf.  We call these the "data" portions.  The rest of the Autoconf
dnl source text consists of comments plus executable code that decides which
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dnl to the GPL from your modified version.
dnl
dnl Written by David MacKenzie, with help from
dnl Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor,
dnl Roland McGrath, Noah Friedman, david d zuhn, and many others.

#
# AC_ETHEREAL_STRUCT_SA_LEN
#
dnl AC_STRUCT_ST_BLKSIZE extracted from the file in qustion,
dnl "acspecific.m4" in GNU Autoconf 2.12, and turned into
dnl AC_ETHEREAL_STRUCT_SA_LEN, which checks if "struct sockaddr"
dnl has the 4.4BSD "sa_len" member, and defines HAVE_SA_LEN; that's
dnl what's in this file.
dnl Done by Guy Harris <guy@netapp.com> on 1998-11-14. 

dnl ### Checks for structure members

AC_DEFUN(AC_ETHEREAL_STRUCT_SA_LEN,
[AC_CACHE_CHECK([for sa_len in struct sockaddr], ac_cv_ethereal_struct_sa_len,
[AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/socket.h>], [struct sockaddr s; s.sa_len;],
ac_cv_ethereal_struct_sa_len=yes, ac_cv_ethereal_struct_sa_len=no)])
if test $ac_cv_ethereal_struct_sa_len = yes; then
  AC_DEFINE(HAVE_SA_LEN)
fi
])


#
# AC_ETHEREAL_IPV6_STACK
#
# By Jun-ichiro "itojun" Hagino, <itojun@iijlab.net>

AC_DEFUN(AC_ETHEREAL_IPV6_STACK,
[
	v6type=unknown
	v6lib=none

	AC_MSG_CHECKING([ipv6 stack type])
	for i in v6d toshiba kame inria zeta linux; do
		case $i in
		v6d)
			AC_EGREP_CPP(yes, [dnl
#include </usr/local/v6/include/sys/types.h>
#ifdef __V6D__
yes
#endif],
				[v6type=$i; v6lib=v6;
				v6libdir=/usr/local/v6/lib;
				CFLAGS="-I/usr/local/v6/include $CFLAGS"])
			;;
		toshiba)
			AC_EGREP_CPP(yes, [dnl
#include <sys/param.h>
#ifdef _TOSHIBA_INET6
yes
#endif],
				[v6type=$i; v6lib=inet6;
				v6libdir=/usr/local/v6/lib;
				CFLAGS="-DINET6 $CFLAGS"])
			;;
		kame)
			AC_EGREP_CPP(yes, [dnl
#include <netinet/in.h>
#ifdef __KAME__
yes
#endif],
				[v6type=$i; v6lib=inet6;
				v6libdir=/usr/local/v6/lib;
				CFLAGS="-DINET6 $CFLAGS"])
			;;
		inria)
			AC_EGREP_CPP(yes, [dnl
#include <netinet/in.h>
#ifdef IPV6_INRIA_VERSION
yes
#endif],
				[v6type=$i; CFLAGS="-DINET6 $CFLAGS"])
			;;
		zeta)
			AC_EGREP_CPP(yes, [dnl
#include <sys/param.h>
#ifdef _ZETA_MINAMI_INET6
yes
#endif],
				[v6type=$i; v6lib=inet6;
				v6libdir=/usr/local/v6/lib;
				CFLAGS="-DINET6 $CFLAGS"])
			;;
		linux)
			if test -d /usr/inet6; then
				v6type=$i
				v6lib=inet6
				v6libdir=/usr/inet6
				CFLAGS="-DINET6 $CFLAGS"
			fi
			;;
		esac
		if test "$v6type" != "unknown"; then
			break
		fi
	done

	if test "$v6lib" != "none"; then
		for dir in $v6libdir /usr/local/v6/lib /usr/local/lib; do
			if test -d $dir -a -f $dir/lib$v6lib.a; then
				LIBS="-L$dir -l$v6lib $LIBS"
				break
			fi
		done
		enable_ipv6="yes"
	else
		enable_ipv6="no"
	fi
	AC_MSG_RESULT(["$v6type, $v6lib"])
])