dnl
dnl configure.in
dnl
dnl Copyright (c) 2023-2024 Oliver Falk <oliver@linux-kernel.at>
dnl
dnl $Id$

AC_PREREQ([2.71])
AC_INIT([libdumbnet],[1.18.0])
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_AUX_DIR(config)
AC_SUBST(ac_aux_dir)

AM_INIT_AUTOMAKE
AC_CONFIG_HEADERS(include/config.h)

LT_PREREQ([2.2])
LT_INIT

dnl XXX - stop the insanity!@#$
AM_MAINTAINER_MODE

dnl Check for system type.
AC_CANONICAL_HOST
case "$host_os" in
  *cygwin*) CYGWIN=yes;;
         *) CYGWIN=no;;
esac

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

dnl Checks for programs.
AC_PROG_CC
AC_PROG_INSTALL
_LT_SET_OPTION([LT_INIT],[dlopen])
m4_warn([obsolete],[_LT_SET_OPTION([LT_INIT],[dlopen])
m4_warn([obsolete],[_LT_SET_OPTION([LT_INIT],[dlopen])
m4_warn([obsolete],[_LT_SET_OPTION([LT_INIT],[dlopen])
m4_warn([obsolete],[_LT_SET_OPTION([LT_INIT],[dlopen])
m4_warn([obsolete],[AC_LIBTOOL_DLOPEN: Remove this warning and the call to _LT_SET_OPTION when you
put the 'dlopen' option into LT_INIT's first parameter.])
: Remove this warning and the call to _LT_SET_OPTION when you
put the 'dlopen' option into LT_INIT's first parameter.])
: Remove this warning and the call to _LT_SET_OPTION when you
put the 'dlopen' option into LT_INIT's first parameter.])
: Remove this warning and the call to _LT_SET_OPTION when you
put the 'dlopen' option into LT_INIT's first parameter.])
: Remove this warning and the call to _LT_SET_OPTION when you
put the 'dlopen' option into LT_INIT's first parameter.])

LT_INIT

dnl Checks for Python.
dnl XXX - use AM_PATH_PYTHON after automake upgrade
AC_MSG_CHECKING(for Python)
AC_ARG_WITH(python,
[  --with-python=DIR       build Python module (using python in DIR)],
[ case "$withval" in
  yes)
     AC_MSG_RESULT(yes)
     PYTHON="python3"
     ;;
  no)
     AC_MSG_RESULT(no)
     ;;
  *)
     AC_MSG_RESULT($withval)
     for subdir in . bin; do
        if test -x $withval/$subdir/python3; then
	   owd=`pwd`
	   if cd $withval/$subdir; then withval=`pwd`; cd $owd; fi
	   PYTHON="$withval/python3"
	   break
	fi
     done
     if test "x$PYTHON" = "x"; then
        AC_MSG_ERROR(python not found in $withval)
     fi
     ;;
  esac 
])
AC_SUBST(PYTHON)
AC_SUBST(TCLINC)
AC_SUBST(TCLLIB)
AM_CONDITIONAL(PYTHON, [test "x$PYTHON" != "x"])
AM_CONDITIONAL(TCL, [test "x$TCLINC" != "x"])

dnl XXX - stupid IRIX cpp
if test -r /usr/include/sgidefs.h ; then
	CPPFLAGS="$CPPFLAGS -D__sgi"
fi
dnl XXX - we need MingW32 under Cygwin for win32
if test "$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_CHECK_LIB(ws2_32, main)
		AC_CHECK_LIB(iphlpapi, main)
		AC_DEFINE(snprintf, _snprintf, 
		    [Use MingW32's internal snprintf])
	else
		AC_MSG_ERROR([need MingW32 package to build under Cygwin])
	fi
	AC_MSG_CHECKING(for WinPcap developer's pack)
	AC_ARG_WITH(wpdpack,
	[  --with-wpdpack=DIR      use WinPcap developer's pack in DIR],
	[ AC_MSG_RESULT($withval)
	  if test -f $withval/include/packet32.h -a -f $withval/lib/packet.lib; then
	     owd=`pwd`
	     if cd $withval; then withval=`pwd`; cd $owd; fi
	     CFLAGS="$CFLAGS -I$withval/include"
	     LIBS="$LIBS -L$withval/lib -lpacket"
	  else
	     AC_MSG_ERROR(packet32.h or packet.lib not found in $withval)
	  fi ],
	[ for dir in ${prefix} ${HOME}/WPdpack ; do
	     if test -f ${dir}/include/packet32.h -a -f ${dir}/lib/packet.lib; then
	        CFLAGS="$CFLAGS -I${dir}/include"
		LIBS="$LIBS -L${dir}/lib -lpacket"
		have_pcap=yes
		break;
	     fi
	  done
	  if test "$have_pcap" != yes; then
	     AC_MSG_ERROR(WinPcap developer's pack not found)
	  fi
	  AC_MSG_RESULT(yes) ])
fi

dnl Checks for libraries.
if test "$CYGWIN" != yes ; then
	AC_LBL_LIBRARY_NET
	AC_CHECK_LIB(nm, open_mib)
fi

dnl Checks for Check.
AC_MSG_CHECKING(for Check)
AC_ARG_ENABLE([check],
  AS_HELP_STRING([--enable-check],
    [compile check support (default enabled)]))
have_check="no"
AS_IF([test "${enable_check}" != "no"], [
  AC_ARG_WITH(check,
  [  --with-check=DIR        use Check (https://libcheck.github.io/check/) in DIR],
  [ case "$withval" in
    yes|no)
      AC_MSG_RESULT(no)
      ;;
    *)
      AC_MSG_RESULT($withval)
      if test -f $withval/include/check.h -a -f $withval/lib/libcheck.a; then
          owd=`pwd`
          if cd $withval; then withval=`pwd`; cd $owd; fi
          CHECKINC="-I$withval/include"
          CHECKLIB="-L$withval/lib -lcheck"
      elif test -f $withval/src/check.h -a -f $withval/src/libcheck.a; then
          owd=`pwd`
          if cd $withval; then withval=`pwd`; cd $owd; fi
          CHECKINC="-I$withval/src"
          CHECKLIB="-L$withval/src -lcheck"
      else
          AC_MSG_ERROR(check.h or libcheck.a not found in $withval)
      fi
      ;;
    esac ],
  [ PKG_CHECK_MODULES([CHECK], [check])
    if test -n "${CHECK_LIBS}"; then
      CHECKINC="${CHECK_CFLAGS}"
      CHECKLIB="${CHECK_LIBS}"
      AC_MSG_RESULT(yes)
      have_check="yes"
    else
      AC_MSG_RESULT(no)
    fi
  ])
  AC_SUBST(CHECKINC)
  AC_SUBST(CHECKLIB)
])
AM_CONDITIONAL([HAVE_CHECK], [test "${have_check}" = "yes"])


if test "$CYGWIN" = yes ; then
	AC_CHECK_HEADERS(Iphlpapi.h winsock2.h)
else
	AC_CHECK_HEADERS(fcntl.h unistd.h)
	AC_CHECK_HEADERS(sys/bufmod.h sys/dlpi.h sys/dlpihdr.h sys/dlpi_ext.h \
	    sys/ioctl.h sys/mib.h sys/ndd_var.h sys/socket.h sys/sockio.h \
	    sys/sysctl.h sys/time.h)
	AC_CHECK_HEADERS(net/bpf.h net/if.h net/if_var.h \
	    net/if_arp.h net/if_dl.h net/pfilt.h \
	    net/pfvar.h net/radix.h net/raw.h net/route.h netinet/in_var.h \
	    net/if_tun.h linux/if_tun.h netinet/ip_fw.h linux/ip_fw.h \
	    linux/ip_fwchains.h linux/netfilter_ipv4/ipchains_core.h)
	AC_CHECK_HEADERS(ip_fil_compat.h netinet/ip_fil_compat.h ip_compat.h \
	    netinet/ip_compat.h ip_fil.h netinet/ip_fil.h)
	AC_CHECK_HEADERS(hpsecurity.h stropts.h)
fi
AC_CHECK_HEADERS(bsd/string.h)
if test "$ac_cv_header_bsd_string_h" = yes; then
    STRLCPY_HEADER="bsd/string.h"
else
    STRLCPY_HEADER="string.h"
fi
AC_SUBST(STRLCPY_HEADER)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_DNET_SOCKADDR_IN6
if test "$ac_cv_header_sys_socket_h" = yes ; then
	AC_DNET_SOCKADDR_SA_LEN
fi
if test "$ac_cv_header_net_if_arp_h" = yes ; then
	AC_DNET_ARPREQ_ARP_DEV
fi
if test "$ac_cv_header_net_route_h" = yes ; then
	AC_DNET_ROUTE_RT_MSGHDR
fi
AC_PROG_GCC_TRADITIONAL
if test "$GCC" = yes ; then
   	CFLAGS="$CFLAGS -Wall"
fi

dnl Checks for library functions.
AC_FUNC_MEMCMP
AC_REPLACE_FUNCS(err strlcat strlcpy strsep)

dnl Checks for other system-specific jonks.
if test "$CYGWIN" != yes ; then
	AC_DNET_BSD_BPF
	AC_DNET_LINUX_PROCFS
	AC_DNET_LINUX_PF_PACKET
	AC_DNET_STREAMS_MIB2
	AC_DNET_STREAMS_ROUTE
	AC_DNET_IOCTL_ARP
	AC_DNET_RAWIP_HOST_OFFLEN
	AC_DNET_RAWIP_COOKED
fi

dnl Check for arp interface.
if test "$ac_cv_header_Iphlpapi_h" = yes ; then
	AC_LIBOBJ([arp-win32])
elif test "$ac_cv_dnet_ioctl_arp" = yes ; then
	AC_LIBOBJ([arp-ioctl])
elif test "$ac_cv_dnet_route_h_has_rt_msghdr" = yes ; then
	AC_LIBOBJ([arp-bsd])
else
	AC_LIBOBJ([arp-none])
fi

dnl Check for Ethernet interface.
if test "$ac_cv_header_Iphlpapi_h" = yes ; then
	AC_LIBOBJ([eth-win32])
elif test "$ac_cv_header_net_pfilt_h" = yes ; then
	AC_LIBOBJ([eth-pfilt])
elif test "$ac_cv_dnet_bsd_bpf" = yes ; then
	AC_LIBOBJ([eth-bsd])
elif test "$ac_cv_dnet_linux_pf_packet" = yes ; then
	AC_LIBOBJ([eth-linux])
elif test "$ac_cv_header_net_raw_h" = yes ; then
	AC_LIBOBJ([eth-snoop])
elif test "$ac_cv_header_sys_ndd_var_h" = yes ; then
	AC_LIBOBJ([eth-ndd])
elif test "$ac_cv_header_sys_dlpi_h" = yes || \
     test "$ac_cv_header_sys_dlpihdr_h" = yes ; then
	AC_LIBOBJ([eth-dlpi])
else
	AC_LIBOBJ([eth-none])
fi

dnl Check for firewall interface.
if test "$ac_cv_header_Iphlpapi_h" = yes ; then
        AC_LIBOBJ([fw-pktfilter])
elif test "$ac_cv_header_net_pfvar_h" = yes ; then
	AC_LIBOBJ([fw-pf])
elif test "$ac_cv_header_netinet_ip_fw_h" = yes ; then
     dnl XXX - ipfw2 support later...
     case "$host_os" in
     *freebsd5* | *kfreebsd*)
	AC_LIBOBJ([fw-none]) ;;
     *)
	AC_LIBOBJ([fw-ipfw]) ;;
     esac
elif test "$ac_cv_header_netinet_ip_fil_h" = yes ; then
	AC_LIBOBJ([fw-ipf])
elif test "$ac_cv_header_linux_ip_fw_h" = yes ; then
	AC_LIBOBJ([fw-ipchains])
elif test "$ac_cv_header_linux_ip_fwchains_h" = yes ; then
	AC_LIBOBJ([fw-ipchains])
elif test "$ac_cv_header_linux_netfilter_ipv4_ipchains_core_h" = yes ; then
	AC_LIBOBJ([fw-ipchains])
else
	AC_LIBOBJ([fw-none])
fi

dnl Check for network interface interface.
if test "$ac_cv_header_Iphlpapi_h" = yes ; then
	AC_LIBOBJ([intf-win32])
else
	AC_LIBOBJ([intf])
fi

dnl Check for raw IP interface.
if test "$ac_cv_header_Iphlpapi_h" = yes ; then
	AC_LIBOBJ([ip-win32])
elif test "$ac_cv_dnet_rawip_cooked" = yes ; then
	AC_LIBOBJ([ip-cooked])
else
	AC_LIBOBJ([ip])
fi

dnl Check for routing interface.
if test "$ac_cv_header_Iphlpapi_h" = yes ; then
	AC_LIBOBJ([route-win32])
elif test "$ac_cv_dnet_route_h_has_rt_msghdr" = yes ; then
	AC_LIBOBJ([route-bsd])
elif test "$ac_cv_dnet_linux_procfs" = yes ; then
	AC_LIBOBJ([route-linux])
elif test "$ac_cv_header_hpsecurity_h" = yes ; then
	AC_LIBOBJ([route-hpux])
else
	AC_LIBOBJ([route-none])
fi

dnl Check for ndisc interface.
if test "$ac_cv_dnet_linux_procfs" = yes ; then
    AC_LIBOBJ([ndisc-linux])
else
    AC_LIBOBJ([ndisc-none])
fi

dnl Check for tun interface.
if test "$ac_cv_header_linux_if_tun_h" = yes ; then
	AC_LIBOBJ([tun-linux])
elif test "$ac_cv_header_net_if_tun_h" = yes ; then
	AC_LIBOBJ([tun-bsd])
elif test -c "/dev/tun0" ; then
	AC_LIBOBJ([tun-bsd])
else
	AC_LIBOBJ([tun-none])
fi

AC_CONFIG_FILES([Makefile dumbnet-config include/Makefile include/dumbnet/Makefile
	man/Makefile src/Makefile python/Makefile python/setup.py
	python/dnet.pxd test/Makefile test/check/Makefile
	test/dumbnet/Makefile])
AC_CONFIG_COMMANDS([default],[chmod 755 dumbnet-config],[])
AC_OUTPUT