configure.in

实现vpn网关用来建立 IP虚拟隧道

dnl
dnl  TUN - Universal TUN/TAP device driver.
dnl  Copyright (C) 1999-2000 Maxim Krasnyansky <[e-mail]>
dnl
dnl  This program is free software; you can redistribute it and/or modify
dnl  it under the terms of the GNU General Public License as published by
dnl  the Free Software Foundation; either version 2 of the License, or
dnl  (at your option) any later version.
dnl
dnl  This program is distributed in the hope that it will be useful,
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.
dnl
dnl  $Id: configure.in,v 1.4 2000/05/04 19:24:53 maxk Exp $
dnl
dnl  Process this file with autoconf to produce a configure script.
dnl
AC_INIT()
AC_SUBST(KDIR)
AC_SUBST(KVER)
AC_SUBST(ARCH)
AC_SUBST(VNODE)

AC_PROG_AWK
AC_PROG_INSTALL

AC_ARG_WITH(kernel,
   --with-kernel=DIR     Kernel source location,
   KDIR="$withval",
   KDIR=/usr/src/sys
)      
AC_ARG_WITH(devno,
   --with-devno=NUM      Number of supported devices,
   AC_DEFINE(NTAP, $withval),
   AC_DEFINE(NTAP, 4)
) 
AC_ARG_ENABLE(bpf,
   --disable-bpf          Disable BPF,
   AC_DEFINE(NBPFILTER, 0),
   AC_DEFINE(NBPFILTER, 1)
)
AC_ARG_ENABLE(bridge,
   --enable-bridge        Enable bridge,
   AC_DEFINE(BRIDGE, 1)
)
AC_DEFINE(INET, 1)

# Check kernel sources
AC_TEST_FILES(Makefile kern/kern_conf.c, $KDIR,  ,
   AC_MSG_ERROR( FreeBSD kernel source not found in $KDIR )
)       
      
ARCH=`uname -m`
KVER=`uname -r | cut -d '-' -f 1`

case $KVER in
   3.*)
	AC_DEFINE(KERNEL)
	TDIR=3.X
	VNODE="sh @/kern/vnode_if.sh @/kern/vnode_if.src"
	;;

   4.*)
	AC_DEFINE(_KERNEL)
	TDIR=4.X
	VNODE="perl @/kern/vnode_if.pl -h @/kern/vnode_if.src"
	;;
   5.*)
	AC_DEFINE(_KERNEL)
	TDIR=4.X
	VNODE="perl @/kern/vnode_if.pl -h @/kern/vnode_if.src"
	;;
esac

AC_TEST_FILES(if_tap.c if_tap.h, $TDIR, ,
   AC_MSG_ERROR( Unsupported kernel version. )
)

AC_LINK_FILES($TDIR/if_tap.c $TDIR/if_tap.h, if_tap.c if_tap.h)
AC_MSG_RESULT(Linking kernel source to @)
ln -s $KDIR @
ln -s $KDIR/$ARCH/include machine

AC_DEFINE_UNQUOTED(TUN_VER, "$TUN_VER")

AC_OUTPUT(Makefile)