dnl 
dnl configure.in
dnl
dnl Copyright (c) 2001 Dug Song <dugsong@monkey.org>
dnl
dnl $Id: configure.in,v 1.18 2002/04/13 05:20:49 dugsong Exp $

AC_INIT(fragroute.c)

AM_INIT_AUTOMAKE(fragroute, 1.2)
AM_CONFIG_HEADER(config.h)

dnl Initialize prefix.
if test "$prefix" = "NONE"; then
   prefix="/usr/local"
fi

dnl Checks for programs.
AC_PROG_AWK
AC_PROG_CC
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_RANLIB

dnl XXX - we need MingW32 under Cygwin for win32
AC_CYGWIN
if test "$CYGWIN" = yes ; then
   if test -d /usr/include/mingw; then
      CPPFLAGS="$CPPFLAGS -mno-cygwin"
      CFLAGS="$CFLAGS -mno-cygwin"
      AC_DEFINE(WIN32_LEAN_AND_MEAN, 1, 
          [Define for faster code generation.])
      AC_DEFINE(snprintf, _snprintf, [Use MingW32's internal snprintf])
      AC_DEFINE(vsnprintf, _vsnprintf, [Use MingW32's internal vsnprintf])
   else
      AC_MSG_ERROR([need MingW32 package to build under Cygwin])
   fi
   dnl XXX - use our internal event-win32 hack
   EVENTINC="-I${srcdir}/win32"
   LIBOBJS="$LIBOBJS event-win32.o"
   AC_SUBST(EVENTINC)

else
dnl XXX - BEGIN !CYGWIN

AC_LBL_LIBRARY_NET

dnl Checks for libevent
AC_MSG_CHECKING(for libevent)
AC_ARG_WITH(libevent,
[  --with-libevent=DIR     use libevent in DIR],
[ case "$withval" in
  yes|no)
     AC_MSG_RESULT(no)
     ;;
  *)
     AC_MSG_RESULT($withval)
     if test -f $withval/include/event.h -a -f $withval/lib/libevent.a; then
        owd=`pwd`
        if cd $withval; then withval=`pwd`; cd $owd; fi
	EVENTINC="-I$withval/include"
	EVENTLIB="-L$withval/lib -levent"
     elif test -f $withval/event.h -a -f $withval/libevent.a; then
        owd=`pwd`
        if cd $withval; then withval=`pwd`; cd $owd; fi
	EVENTINC="-I$withval"
	EVENTLIB="-L$withval -levent"
     else
        AC_ERROR(event.h or libevent.a not found in $withval)
     fi
     ;;
  esac ],
[ if test -f ${prefix}/include/event.h -a -f ${prefix}/lib/libevent.a; then
     EVENTINC="-I${prefix}/include"
     EVENTLIB="-L${prefix}/lib -levent"
  else
     AC_MSG_RESULT(no)
     AC_ERROR(libevent not found)
  fi
  AC_MSG_RESULT(yes) ]
)
AC_SUBST(EVENTINC)
AC_SUBST(EVENTLIB)

dnl XXX - END !CYGWIN
fi

dnl Checks for libpcap
AC_MSG_CHECKING(for libpcap)
AC_ARG_WITH(libpcap,
[  --with-libpcap=DIR      use libpcap in DIR],
[ case "$withval" in
  yes|no)
     AC_MSG_RESULT(no)
     ;;
  *)
     AC_MSG_RESULT($withval)
     if test -f $withval/pcap.h -a -f $withval/libpcap.a; then
        owd=`pwd`
        if cd $withval; then withval=`pwd`; cd $owd; fi
	PCAPINC="-I$withval -I$withval/bpf"
	PCAPLIB="-L$withval -lpcap"
     elif test -f $withval/include/pcap.h -a \
	       -f $withval/include/net/bpf.h; then
	owd=`pwd`
	if cd $withval; then withval=`pwd`; cd $owd; fi
	PCAPINC="-I$withval/include"
	if test -f $withval/lib/libwpcap.a; then
	   PCAPLIB="-L$withval/lib -lwpcap"
	else
	   PCAPLIB="-L$withval/lib -lpcap"
        fi
     else
        AC_ERROR(pcap.h, net/bpf.h, or libpcap.a not found in $withval)
     fi
     ;;
  esac ],
[ if test -f ${prefix}/include/pcap.h; then
     PCAPINC="-I${prefix}/include"
     if test -f ${prefix}/lib/libwpcap.a; then
	PCAPLIB="-L${prefix}/lib -lwpcap"
     else
        PCAPLIB="-L${prefix}/lib -lpcap"
     fi
  elif test -f /usr/include/pcap/pcap.h; then
     PCAPINC="-I/usr/include/pcap"
     PCAPLIB="-lpcap"
  elif test -f /usr/include/pcap.h; then
     PCAPLIB="-lpcap"
  else
     AC_MSG_RESULT(no)
     AC_ERROR(libpcap not found)
  fi
  AC_MSG_RESULT(yes) ]
)
AC_SUBST(PCAPINC)
AC_SUBST(PCAPLIB)

dnl Checks for (installed) libdnet
AC_MSG_CHECKING(for libdnet)
AC_ARG_WITH(libdnet,
[  --with-libdnet=DIR      use libdnet in DIR],
[ case "$withval" in
  yes|no)
     AC_MSG_RESULT(no)
     ;;
  *)
     AC_MSG_RESULT($withval)
     if test -f $withval/src/libdnet.a; then
	DNETINC="-I$withval/include"
	DNETLIB="-L$withval/src -ldnet `$withval/dnet-config --libs`"
     elif test -x $withval/bin/dnet-config; then
	DNETINC="`$withval/bin/dnet-config --cflags`"
	DNETLIB="`$withval/bin/dnet-config --libs`"
     else
        AC_ERROR(dnet-config not found in $withval/bin)
     fi
     ;;
  esac ],
[ if test -x ${prefix}/bin/dnet-config; then
     DNETINC="`${prefix}/bin/dnet-config --cflags`"
     DNETLIB="`${prefix}/bin/dnet-config --libs`"
  else
     AC_MSG_RESULT(no)
     AC_ERROR(libdnet not found)
  fi
  AC_MSG_RESULT(yes) ]
)
AC_SUBST(DNETINC)
AC_SUBST(DNETLIB)

dnl Check for tunnel interface
AC_MSG_CHECKING(for tunnel interface)
if test -c /dev/ip -a -c /dev/tun -a -f /usr/include/net/if_tun.h; then
   AC_MSG_RESULT(Universal TUN/TAP driver on Solaris)
   LIBOBJS="$LIBOBJS tun-solaris.o"
elif test "$CYGWIN" = yes ; then
   AC_MSG_RESULT(win32 - assume CIPE driver is installed)
   LIBOBJS="$LIBOBJS tun-win32.o"
else
   AC_MSG_RESULT(using loopback)
   LIBOBJS="$LIBOBJS tun-loop.o"
fi

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(fcntl.h inttypes.h malloc.h stdint.h strings.h)
AC_CHECK_HEADERS(sys/ioctl.h sys/time.h unistd.h)
AC_CHECK_HEADERS(windows.h winsock.h)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_OFF_T
AC_TYPE_SIZE_T
AC_HEADER_TIME
AC_STRUCT_TM
AC_PROG_GCC_TRADITIONAL
if test "$GCC" = yes; then
   CFLAGS="$CFLAGS -Wall"
fi

dnl Checks for library functions.
AC_TYPE_SIGNAL
AC_CHECK_FUNCS(arc4random gettimeofday select strdup)
AC_REPLACE_FUNCS(getopt strlcat strlcpy)

dnl Set system-wide configuration file.
FRAGROUTE_CONF=`eval echo ${sysconfdir}/fragroute.conf`
AC_SUBST(FRAGROUTE_CONF)
AC_DEFINE_UNQUOTED(FRAGROUTE_CONF, "$FRAGROUTE_CONF",
	[Location of configuration file.])

AC_OUTPUT(Makefile scripts/Makefile win32/Makefile fragroute.8)