dnl @(#) $Header$ (LBL)
dnl
dnl Copyright (c) 1994, 1995, 1996, 1997
dnl	The Regents of the University of California.  All rights reserved.
dnl
dnl Process this file with autoconf to produce a configure script.
dnl

AC_INIT(pcap.c)

AC_CANONICAL_SYSTEM

umask 002

if test -z "$PWD" ; then
	PWD=`pwd`
fi

AC_LBL_C_INIT(V_CCOPT, V_INCLS)

AC_CHECK_HEADERS(malloc.h sys/ioccom.h sys/sockio.h)

AC_LBL_FIXINCLUDES

AC_CHECK_FUNCS(ether_hostton strerror)

dnl
dnl Not all versions of test support -c (character special) but it's a
dnl better way of testing since the device might be protected. So we
dnl check in our normal order using -r and then check the for the /dev
dnl guys again using -c.
dnl
AC_ARG_WITH(pcap, [  --with-pcap=TYPE        use packet capture TYPE])
AC_MSG_CHECKING(packet capture type)
if test ! -z "$with_pcap" ; then
	V_PCAP="$withval"
elif test -r /dev/bpf0 ; then
	V_PCAP=bpf
elif test -r /usr/include/net/pfilt.h ; then
	V_PCAP=pf
elif test -r /dev/enet ; then
	V_PCAP=enet
elif test -r /dev/nit ; then
	V_PCAP=snit
elif test -r /usr/include/sys/net/nit.h ; then
	V_PCAP=nit
elif test -r /usr/include/net/raw.h ; then
	V_PCAP=snoop
elif test -r /usr/include/sys/dlpi.h ; then
	V_PCAP=dlpi
elif test -r /usr/include/linux/socket.h ; then
	V_PCAP=linux
elif test -c /dev/bpf0 ; then		# check again in case not readable
	V_PCAP=bpf
elif test -c /dev/enet ; then		# check again in case not readable
	V_PCAP=enet
elif test -c /dev/nit ; then		# check again in case not readable
	V_PCAP=snit
else
	V_PCAP=null
fi
AC_MSG_RESULT($V_PCAP)

case "$V_PCAP" in

dlpi)
	AC_CHECK_HEADERS(sys/bufmod.h sys/dlpi_ext.h)
	AC_MSG_CHECKING(for /dev/dlpi device)
	if test -c /dev/dlpi ; then
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_DEV_DLPI)
	else
		AC_MSG_RESULT(no)
		dir="/dev/dlpi"
		AC_MSG_CHECKING(for $dir directory)
		if test -d $dir ; then
			AC_MSG_RESULT(yes)
			AC_DEFINE_UNQUOTED(PCAP_DEV_PREFIX, "$dir")
		else
			AC_MSG_RESULT(no)
		fi
	fi
	;;

linux)
	AC_CHECK_HEADERS(net/if_arp.h)
	AC_MSG_CHECKING(Linux kernel version)
	AC_CACHE_VAL(ac_cv_linux_vers,
	    ac_cv_linux_vers=`uname -r 2>&1 | \
		sed -n -e '$s/.* //' -e '$s/\..*//p'`)
	AC_MSG_RESULT($ac_cv_linux_vers)
	if test $ac_cv_linux_vers -lt 2 ; then
		AC_MSG_ERROR(version 2 or higher required; see libcap-nessus/INSTALL for more info)
	fi
	;;

null)
	AC_MSG_WARN(cannot determine packet capture interface)
	AC_MSG_WARN((see libcap-nessus/INSTALL for more info))
	;;

esac

AC_LBL_LEX_AND_YACC(V_LEX, V_YACC, pcap_)


AC_PATH_PROG(PLEX, $V_LEX,,$PATH)

test "x$PLEX" = "x" && AC_ERROR(*** Neither lex nor flex are installed - can not continue)
	

AC_PATH_PROG(PYACC, $V_YACC,,$PATH)
test "x$PYACC" = "x" && AC_ERROR(*** Neither yacc nor bison are installed - can not continue)
	

case "$target_os" in

aix*)
	dnl Workaround to enable certain features
	AC_DEFINE(_SUN)
	;;

hpux9*)
	AC_DEFINE(HAVE_HPUX9)
	;;

hpux10.0*)
	;;

hpux10.1*)
	;;

hpux*)
	dnl HPUX 10.20 and above is similar to HPUX 9...
	AC_DEFINE(HAVE_HPUX10_20)
	;;

sinix*)
	AC_MSG_CHECKING(if SINIX compiler defines sinix)
	AC_CACHE_VAL(ac_cv_cc_sinix_defined,
		AC_TRY_COMPILE(
		    [],
		    [int i = sinix;],
		    ac_cv_cc_sinix_defined=yes,
		    ac_cv_cc_sinix_defined=no))
	    AC_MSG_RESULT($ac_cv_cc_sinix_defined)
	    if test $ac_cv_cc_sinix_defined = no ; then
		    AC_DEFINE(sinix)
	    fi
	;;

solaris*)
	AC_DEFINE(HAVE_SOLARIS)
	;;

linux*)
	V_INCLS="$V_INCLS -Ilinux-include"
	;;
esac

AC_CHECK_PROGS(V_RANLIB, ranlib, @true)

AC_LBL_DEVEL(V_CCOPT)

AC_LBL_SOCKADDR_SA_LEN

AC_LBL_UNALIGNED_ACCESS

if test "${srcdir}" = "." ; then
	srcdirprefix=""
else
	srcdirprefix="./"
fi

if test -r ${srcdirprefix}lbl/gnuc.h ; then
	rm -f gnuc.h
	ln -s ${srcdirprefix}lbl/gnuc.h gnuc.h
fi

rm -f bpf_filter.c
if test -f ${srcdirprefix}net/bpf_filter.c
then
ln -s ${srcdirprefix}net/bpf_filter.c bpf_filter.c
else
ln -s ${srcdirprefix}bpf/net/bpf_filter.c bpf_filter.c
ln -s ${srcdirprefix}bpf/net net
fi

AC_SUBST(V_CCOPT)
AC_SUBST(V_INCLS)
AC_SUBST(V_LEX)
AC_SUBST(V_PCAP)
AC_SUBST(V_RANLIB)
AC_SUBST(V_YACC)
INSTALL="`pwd`/install-sh -c"
AC_SUBST(INSTALL)


AC_OUTPUT(Makefile)

if test -f .devel ; then
	make depend
fi
exit 0