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[libpcap] / configure.in

dnl @(#) $Header: /tcpdump/master/libpcap/configure.in,v 1.168 2008-12-23 20:49:26 guy Exp $ (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

#
# See
#
#       http://ftp.gnu.org/gnu/config/README
#
# for the URLs to use to fetch new versions of config.guess and
# config.sub.
#

AC_REVISION($Revision: 1.168 $)
AC_PREREQ(2.50)
AC_INIT(pcap.c)

AC_CANONICAL_SYSTEM

AC_LBL_C_INIT_BEFORE_CC(V_CCOPT, V_INCLS)
AC_PROG_CC
AC_LBL_C_INIT(V_CCOPT, V_INCLS)
AC_LBL_SHLIBS_INIT
AC_LBL_C_INLINE
AC_C___ATTRIBUTE__

AC_CHECK_HEADERS(sys/bitypes.h)

AC_CHECK_TYPE([int8_t], ,
        [AC_DEFINE([int8_t], [signed char],
        [Define to `signed char' if int8_t not defined.])],
        [AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([u_int8_t], ,
        [AC_DEFINE([u_int8_t], [unsigned char],
        [Define to `unsigned char' if u_int8_t not defined.])],
        [AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([int16_t], ,
        [AC_DEFINE([int16_t], [short],
        [Define to `short' if int16_t not defined.])]
        [AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([u_int16_t], ,
        [AC_DEFINE([u_int16_t], [unsigned short],
        [Define to `unsigned short' if u_int16_t not defined.])],
        [AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([int32_t], ,
        [AC_DEFINE([int32_t], [int],
        [Define to `int' if int32_t not defined.])],
        [AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([u_int32_t], ,
        [AC_DEFINE([u_int32_t], [unsigned int],
        [Define to `unsigned int' if u_int32_t not defined.])],
        [AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([int64_t], ,
        [AC_DEFINE([int64_t], [long long],
        [Define to `long long' if int64_t not defined.])],
        [AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([u_int64_t], ,
        [AC_DEFINE([u_int64_t], [unsigned long long],
        [Define to `unsigned long long' if u_int64_t not defined.])],
        [AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])

#
# Try to arrange for large file support.
#
AC_SYS_LARGEFILE
AC_FUNC_FSEEKO

dnl
dnl Even if <net/bpf.h> were, on all OSes that support BPF, fixed to
dnl include <sys/ioccom.h>, and we were to drop support for older
dnl releases without that fix, so that pcap-bpf.c doesn't need to
dnl include <sys/ioccom.h>, the test program in "AC_LBL_FIXINCLUDES"
dnl in "aclocal.m4" uses it, so we would still have to test for it
dnl and set "HAVE_SYS_IOCCOM_H" if we have it, otherwise
dnl "AC_LBL_FIXINCLUDES" wouldn't work on some platforms such as Solaris.
dnl
AC_CHECK_HEADERS(sys/ioccom.h sys/sockio.h limits.h paths.h)
AC_CHECK_HEADERS(net/pfvar.h, , , [#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>])
if test "$ac_cv_header_net_pfvar_h" = yes; then
        #
        # Check for various PF actions.
        #
        AC_MSG_CHECKING(whether net/pfvar.h defines PF_NAT through PF_NORDR)
        AC_TRY_COMPILE(
            [#include <sys/types.h>
            #include <sys/socket.h>
            #include <net/if.h>
            #include <net/pfvar.h>],
            [return PF_NAT+PF_NONAT+PF_BINAT+PF_NOBINAT+PF_RDR+PF_NORDR;],
            [
                AC_MSG_RESULT(yes)
                AC_DEFINE(HAVE_PF_NAT_THROUGH_PF_NORDR, 1,
                    [define if net/pfvar.h defines PF_NAT through PF_NORDR])
            ],
            AC_MSG_RESULT(no))
fi
AC_CHECK_HEADERS(netinet/if_ether.h, , , [#include <sys/types.h>
#include <sys/socket.h>])
if test "$ac_cv_header_netinet_if_ether_h" != yes; then
        #
        # The simple test didn't work.
        # Do we need to include <net/if.h> first?
        # Unset ac_cv_header_netinet_if_ether_h so we don't
        # treat the previous failure as a cached value and
        # suppress the next test.
        #
        AC_MSG_NOTICE([Rechecking with some additional includes])
        unset ac_cv_header_netinet_if_ether_h
        AC_CHECK_HEADERS(netinet/if_ether.h, , , [#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
struct mbuf;
struct rtentry;
#include <net/if.h>])
fi

AC_LBL_FIXINCLUDES

AC_CHECK_FUNCS(strerror strlcpy)

needsnprintf=no
AC_CHECK_FUNCS(vsnprintf snprintf,,
        [needsnprintf=yes])
if test $needsnprintf = yes; then
        AC_LIBOBJ(snprintf)
fi

#
# Do this before checking for ether_hostton(), as it's a
# "gethostbyname() -ish function".
#
AC_LBL_LIBRARY_NET

#
# You are in a twisty little maze of UN*Xes, all different.
# Some might not have ether_hostton().
# Some might have it, but not declare it in any header file.
# Some might have it, but declare it in <netinet/if_ether.h>.
# Some might have it, but declare it in <netinet/ether.h>
# (And some might have it but document it as something declared in
# <netinet/ethernet.h>, although <netinet/if_ether.h> appears to work.)
#
# Before you is a C compiler.
#
AC_CHECK_FUNCS(ether_hostton)
if test "$ac_cv_func_ether_hostton" = yes; then
        #
        # OK, we have ether_hostton().  Do we have <netinet/if_ether.h>?
        #
        if test "$ac_cv_header_netinet_if_ether_h" = yes; then
                #
                # Yes.  Does it declare ether_hostton()?
                #
                AC_CHECK_DECL(ether_hostton,
                    [
                        AC_DEFINE(NETINET_IF_ETHER_H_DECLARES_ETHER_HOSTTON,,
                            [Define to 1 if netinet/if_ether.h declares `ether_hostton'])
                    ],,
                    [
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
struct mbuf;
struct rtentry;
#include <net/if.h>
#include <netinet/if_ether.h>
                    ])
        fi
        #
        # Did that succeed?
        #
        if test "$ac_cv_have_decl_ether_hostton" != yes; then
                #
                # No, how about <netinet/ether.h>, as on Linux?
                #
                AC_CHECK_HEADERS(netinet/ether.h)
                if test "$ac_cv_header_netinet_ether_h" = yes; then
                        #
                        # We have it - does it declare ether_hostton()?
                        # Unset ac_cv_have_decl_ether_hostton so we don't
                        # treat the previous failure as a cached value and
                        # suppress the next test.
                        #
                        unset ac_cv_have_decl_ether_hostton
                        AC_CHECK_DECL(ether_hostton,
                            [
                                AC_DEFINE(NETINET_ETHER_H_DECLARES_ETHER_HOSTTON,,
                                    [Define to 1 if netinet/ether.h declares `ether_hostton'])
                            ],,
                            [
#include <netinet/ether.h>
                            ])
                fi
        fi
        #
        # Is ether_hostton() declared?
        #
        if test "$ac_cv_have_decl_ether_hostton" != yes; then
                #
                # No, we'll have to declare it ourselves.
                # Do we have "struct ether_addr"?
                #
                AC_CHECK_TYPES(struct ether_addr,,,
                    [
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
struct mbuf;
struct rtentry;
#include <net/if.h>
#include <netinet/if_ether.h>
                    ])
                AC_DEFINE(HAVE_DECL_ETHER_HOSTTON, 0,
                    [Define to 1 if you have the declaration of `ether_hostton', and to 0 if you
don't.])
        else
                AC_DEFINE(HAVE_DECL_ETHER_HOSTTON, 1,
                    [Define to 1 if you have the declaration of `ether_hostton', and to 0 if you
don't.])
        fi
fi

dnl to pacify those who hate protochain insn
AC_MSG_CHECKING(if --disable-protochain option is specified)
AC_ARG_ENABLE(protochain,
AC_HELP_STRING([--disable-protochain],[disable \"protochain\" insn]))
case "x$enable_protochain" in
xyes)   enable_protochain=enabled       ;;
xno)    enable_protochain=disabled      ;;
x)      enable_protochain=enabled       ;;
esac

if test "$enable_protochain" = "disabled"; then
        AC_DEFINE(NO_PROTOCHAIN,1,[do not use protochain])
fi
AC_MSG_RESULT(${enable_protochain})

#
# SITA support is mutually exclusive with native capture support;
# "--with-sita" selects SITA support.
#
AC_ARG_WITH(sita,
AC_HELP_STRING([--with-sita],[include SITA support]),
[
        if test ! "x$withval" = "xno" ; then
                AC_DEFINE(SITA,1,[include ACN support])
                AC_MSG_NOTICE(Enabling SITA ACN support)
                V_PCAP=sita
                V_FINDALLDEVS=sita
        fi
],
[
dnl
dnl Not all versions of test support -c (character special) but it's a
dnl better way of testing since the device might be protected. So we
dnl check in our normal order using -r and then check the for the /dev
dnl guys again using -c.
dnl
dnl XXX This could be done for cross-compiling, but for now it's not.
dnl
if test -z "$with_pcap" && test "$cross_compiling" = yes; then
        AC_MSG_ERROR(pcap type not determined when cross-compiling; use --with-pcap=...)
fi
AC_ARG_WITH(pcap,
AC_HELP_STRING([--with-pcap=TYPE],[use packet capture TYPE]))
AC_MSG_CHECKING(packet capture type)
if test ! -z "$with_pcap" ; then
        V_PCAP="$withval"
elif test -r /dev/bpf -o -h /dev/bpf ; then
        #
        # Cloning BPF device.
        #
        V_PCAP=bpf
        AC_DEFINE(HAVE_CLONING_BPF,1,[define if you have a cloning BPF device])
elif test -r /dev/bpf0 ; then
        V_PCAP=bpf
elif test -r /usr/include/net/pfilt.h ; then
        V_PCAP=pf
elif test -r /dev/enet ; then
        V_PCAP=enet
elif test -r /dev/nit ; then
        V_PCAP=snit
elif test -r /usr/include/sys/net/nit.h ; then
        V_PCAP=nit
elif test -r /usr/include/linux/socket.h ; then
        V_PCAP=linux
elif test -r /usr/include/net/raw.h ; then
        V_PCAP=snoop
elif test -r /usr/include/odmi.h ; then
        #
        # On AIX, the BPF devices might not yet be present - they're
        # created the first time libpcap runs after booting.
        # We check for odmi.h instead.
        #
        V_PCAP=bpf
elif test -c /dev/bpf0 ; then           # check again in case not readable
        V_PCAP=bpf
elif test -r /usr/include/sys/dlpi.h ; then
        V_PCAP=dlpi
elif test -c /dev/enet ; then           # check again in case not readable
        V_PCAP=enet
elif test -c /dev/nit ; then            # check again in case not readable
        V_PCAP=snit
else
        V_PCAP=null
fi
AC_MSG_RESULT($V_PCAP)

#
# Do capture-mechanism-dependent tests.
#
case "$V_PCAP" in
dlpi)
        #
        # Checks to see if Solaris has the public libdlpi(3LIB) library.
        # Note: The existence of /usr/include/libdlpi.h does not mean it is the
        # public libdlpi(3LIB) version. Before libdlpi was made public, a 
        # private version also existed, which did not have the same APIs. 
        # Due to a gcc bug, the default search path for 32-bit libraries does
        # not include /lib, we add it explicitly here.
        # [http://bugs.opensolaris.org/view_bug.do?bug_id=6619485]. 
        # Also, due to the bug above applications that link to libpcap with
        # libdlpi will have to add "-L/lib" option to "configure".
        #
        saved_ldflags=$LDFLAGS
        LDFLAGS="$LIBS -L/lib"
        AC_CHECK_LIB(dlpi, dlpi_walk,
                LIBS="-ldlpi $LIBS"
                V_PCAP=libdlpi
                AC_DEFINE(HAVE_LIBDLPI,1,[if libdlpi exists]),
                V_PCAP=dlpi)
        LDFLAGS=$saved_ldflags

        #
        # Checks whether <sys/dlpi.h> is usable, to catch weird SCO
        # versions of DLPI.
        #
        AC_MSG_CHECKING(whether <sys/dlpi.h> is usable)
        AC_CACHE_VAL(ac_cv_sys_dlpi_usable,
                AC_TRY_COMPILE(
                    [
                        #include <sys/types.h>
                        #include <sys/time.h>
                        #include <sys/dlpi.h>
                    ],
                    [int i = DL_PROMISC_PHYS;],
                    ac_cv_sys_dlpi_usable=yes,
                    ac_cv_sys_dlpi_usable=no))
        AC_MSG_RESULT($ac_cv_sys_dlpi_usable)
        if test $ac_cv_sys_dlpi_usable = no ; then
                AC_MSG_ERROR(<sys/dlpi.h> is not usable on this system; it probably has a non-standard DLPI)
        fi

        #
        # Check whether we have a /dev/dlpi device or have multiple devices.
        #
        AC_MSG_CHECKING(for /dev/dlpi device)
        if test -c /dev/dlpi ; then
                AC_MSG_RESULT(yes)
                AC_DEFINE(HAVE_DEV_DLPI, 1, [define if you have a /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", [/dev/dlpi directory])
                else
                        AC_MSG_RESULT(no)
                fi
        fi

        #
        # This check is for Solaris with DLPI support for passive modes.
        # See dlpi(7P) for more details.
        #
        AC_LBL_DL_PASSIVE_REQ_T
        ;;

linux)
        AC_MSG_CHECKING(Linux kernel version)
        if test "$cross_compiling" = yes; then
                AC_CACHE_VAL(ac_cv_linux_vers,
                    ac_cv_linux_vers=unknown)
        else
                AC_CACHE_VAL(ac_cv_linux_vers,
                    ac_cv_linux_vers=`uname -r 2>&1 | \
                        sed -n -e '$s/.* //' -e '$s/\..*//p'`)
        fi
        AC_MSG_RESULT($ac_cv_linux_vers)
        if test $ac_cv_linux_vers = unknown ; then
                AC_MSG_ERROR(cannot determine linux version when cross-compiling)
        fi
        if test $ac_cv_linux_vers -lt 2 ; then
                AC_MSG_ERROR(version 2 or higher required; see the INSTALL doc for more info)
        fi

        #
        # Do we have the wireless extensions?
        #
        AC_CHECK_HEADERS(linux/wireless.h, [], [],
        [
#include <sys/socket.h>
#include <linux/if.h>
#include <linux/types.h>
        ])

        #
        # Do we have libnl?
        #
        AC_ARG_WITH(libnl,
        AC_HELP_STRING([--without-libnl],[disable libnl support @<:@default=yes, on Linux, if present@:>@]),
                with_libnl=$withval,,)

        if test x$with_libnl != xno ; then
                AC_CHECK_LIB(nl, nl_handle_alloc,
                        LIBS="-lnl $LIBS"
                        AC_DEFINE(HAVE_LIBNL,1,[if libnl exists]),
                        if test x$with_libnl = xyes ; then
                                AC_MSG_ERROR([libnl support requested but libnl not found])
                        fi
                )
        fi

        AC_LBL_TPACKET_STATS
        AC_LBL_LINUX_TPACKET_AUXDATA_TP_VLAN_TCI
        ;;

bpf)
        #
        # Check whether we have the *BSD-style ioctls.
        #
        AC_CHECK_HEADERS(net/if_media.h)

        AC_MSG_CHECKING(whether the system supports zerocopy BPF)
        AC_TRY_COMPILE(
            [#include <sys/socket.h>
            #include <sys/ioctl.h>
            #include <net/if.h>
            #include <net/bpf.h>],
            [return (BIOCROTZBUF + BPF_BUFMODE_ZBUF);],
            [  
                AC_MSG_RESULT(yes)
                AC_DEFINE(HAVE_ZEROCOPY_BPF, 1,
                [define if the system supports zerocopy BPF])
            ],
            AC_MSG_RESULT(no))

            #
            # Check whether we have struct BPF_TIMEVAL.
            #
            AC_CHECK_TYPES(struct BPF_TIMEVAL,,,
                [
#include <sys/types.h>
#include <sys/ioctl.h>
#ifdef HAVE_SYS_IOCCOM_H
#include <sys/ioccom.h>
#endif
#include <net/bpf.h>
                    ])
        ;;

dag)
        V_DEFS="$V_DEFS -DDAG_ONLY"
        ;;

septel)
        V_DEFS="$V_DEFS -DSEPTEL_ONLY"
        ;;

snf)
        V_DEFS="$V_DEFS -DSNF_ONLY"
        ;;

null)
        AC_MSG_WARN(cannot determine packet capture interface)
        AC_MSG_WARN((see the INSTALL doc for more info))
        ;;
esac

dnl
dnl Now figure out how we get a list of interfaces and addresses,
dnl if we support capturing.  Don't bother if we don't support
dnl capturing.
dnl
if test "$V_PCAP" = null
then
        #
        # We can't capture, so we can't open any capture
        # devices, so we won't return any interfaces.
        #
        V_FINDALLDEVS=null
else
        AC_CHECK_FUNC(getifaddrs,[
                #
                # We have "getifaddrs()"; make sure we have <ifaddrs.h>
                # as well, just in case some platform is really weird.
                #
                AC_CHECK_HEADER(ifaddrs.h,[
                    #
                    # We have the header, so we use "getifaddrs()" to
                    # get the list of interfaces.
                    #
                    V_FINDALLDEVS=getad
                ],[
                    #
                    # We don't have the header - give up.
                    # XXX - we could also fall back on some other
                    # mechanism, but, for now, this'll catch this
                    # problem so that we can at least try to figure
                    # out something to do on systems with "getifaddrs()"
                    # but without "ifaddrs.h", if there is something
                    # we can do on those systems.
                    #
                    AC_MSG_ERROR([Your system has getifaddrs() but doesn't have a usable <ifaddrs.h>.])
                ])
        ],[
                #
                # Well, we don't have "getifaddrs()", so we have to use
                # some other mechanism; determine what that mechanism is.
                #
                # The first thing we use is the type of capture mechanism,
                # which is somewhat of a proxy for the OS we're using.
                #
                case "$V_PCAP" in

                dlpi|libdlpi)
                        AC_CHECK_HEADERS(sys/bufmod.h sys/dlpi_ext.h)
                        #
                        # This might be Solaris 8 or later, with
                        # SIOCGLIFCONF, or it might be some other OS
                        # or some older version of Solaris, with
                        # just SIOCGIFCONF.
                        #
                        AC_MSG_CHECKING(whether we have SIOCGLIFCONF)
                        AC_CACHE_VAL(ac_cv_lbl_have_siocglifconf,
                            AC_TRY_COMPILE(
                                [#include <sys/param.h>
                                #include <sys/file.h>
                                #include <sys/ioctl.h>
                                #include <sys/socket.h>
                                #include <sys/sockio.h>],
                                [ioctl(0, SIOCGLIFCONF, (char *)0);],
                                ac_cv_lbl_have_siocglifconf=yes,
                                ac_cv_lbl_have_siocglifconf=no))
                        AC_MSG_RESULT($ac_cv_lbl_have_siocglifconf)
                        if test $ac_cv_lbl_have_siocglifconf = yes ; then
                                V_FINDALLDEVS=glifc
                        else
                                V_FINDALLDEVS=gifc
                        fi
                        #
                        # Needed for common functions used by pcap-[dlpi,libdlpi].c
                        #
                        SSRC="dlpisubs.c"
                        ;;

                *)
                        #
                        # Assume we just have SIOCGIFCONF.
                        # (XXX - on at least later Linux kernels, there's
                        # another mechanism, and we should be using that
                        # instead.)
                        #
                        V_FINDALLDEVS=gifc
                        ;;
                esac])
fi
])

AC_MSG_CHECKING(for socklen_t)
AC_TRY_COMPILE([
        #include <sys/types.h>
        #include <sys/socket.h>
        ],
        [ socklen_t x; ],
        have_socklen_t=yes,
        have_socklen_t=no)
if test "x$have_socklen_t" = "xyes"; then
        AC_DEFINE(HAVE_SOCKLEN_T, 1, [define if socklen_t is defined])
fi
AC_MSG_RESULT($have_socklen_t)

AC_ARG_ENABLE(ipv6,
AC_HELP_STRING([--enable-ipv6],[build IPv6-capable version @<:@default=yes, if getaddrinfo available@:>@]),
    [],
    [enable_ipv6=ifavailable])
if test "$enable_ipv6" != "no"; then
        AC_CHECK_FUNC(getaddrinfo,
            [
                AC_DEFINE(INET6,1,[IPv6])
            ],
            [
                if test "$enable_ipv6" != "ifavailable"; then
                        AC_MSG_FAILURE([--enable-ipv6 was given, but getaddrinfo isn't available])
                fi
            ])
fi

AC_MSG_CHECKING(whether to build optimizer debugging code)
AC_ARG_ENABLE(optimizer-dbg,
AC_HELP_STRING([--enable-optimizer-dbg],[build optimizer debugging code]))
if test "$enable_optimizer_dbg" = "yes"; then
        AC_DEFINE(BDEBUG,1,[Enable optimizer debugging])
fi
AC_MSG_RESULT(${enable_optimizer_dbg-no})

AC_MSG_CHECKING(whether to build parser debugging code)
AC_ARG_ENABLE(yydebug,
AC_HELP_STRING([--enable-yydebug],[build parser debugging code]))
if test "$enable_yydebug" = "yes"; then
        AC_DEFINE(YYDEBUG,1,[Enable parser debugging])
fi
AC_MSG_RESULT(${enable_yydebug-no})

# Check for Endace DAG card support.
AC_ARG_WITH([dag],
AC_HELP_STRING([--with-dag@<:@=DIR@:>@],[include Endace DAG support @<:@"yes", "no" or DIR; default="yes" on BSD and Linux if present@:>@]),
[
        if test "$withval" = no
        then
                # User doesn't want DAG support.
                want_dag=no
        elif test "$withval" = yes
        then
                # User wants DAG support but hasn't specified a directory.
                want_dag=yes
        else
                # User wants DAG support and has specified a directory, so use the provided value.
                want_dag=yes
                dag_root=$withval
        fi
],[
        #
        # Use DAG API if present, otherwise don't
        #
        want_dag=ifpresent
])

AC_ARG_WITH([dag-includes],
AC_HELP_STRING([--with-dag-includes=DIR],[Endace DAG include directory]),
[
        # User wants DAG support and has specified a header directory, so use the provided value.
        want_dag=yes
        dag_include_dir=$withval
],[])

AC_ARG_WITH([dag-libraries],
AC_HELP_STRING([--with-dag-libraries=DIR],[Endace DAG library directory]),
[
        # User wants DAG support and has specified a library directory, so use the provided value.
        want_dag=yes
        dag_lib_dir=$withval
],[])

case "$V_PCAP" in
linux|bpf|dag)
        #
        # We support the DAG API if we're on Linux or BSD, or if we're
        # building a DAG-only libpcap.
        #
        ;;
*)
        #
        # If the user explicitly requested DAG, tell them it's not
        # supported.
        #
        # If they expressed no preference, don't include it.
        #
        if test $want_dag = yes; then
                AC_MSG_ERROR([DAG support is only available with 'linux' 'bpf' and 'dag' packet capture types])
        elif test $want_dag = yes; then
                want_dag=no
        fi
        ;;
esac

ac_cv_lbl_dag_api=no
if test "$want_dag" != no; then

        AC_MSG_CHECKING([whether we have DAG API headers])

        # If necessary, set default paths for DAG API headers and libraries.
        if test -z "$dag_root"; then
            dag_root=/usr/local
        fi

        if test -z "$dag_include_dir"; then
                dag_include_dir="$dag_root/include"
        fi

        if test -z "$dag_lib_dir"; then
            dag_lib_dir="$dag_root/lib"
        fi
        
        if test -z "$dag_tools_dir"; then
            dag_tools_dir="$dag_root/tools"
                fi

        if test -r $dag_include_dir/dagapi.h; then
                ac_cv_lbl_dag_api=yes
        fi
        AC_MSG_RESULT([$ac_cv_lbl_dag_api ($dag_include_dir)])
fi

if test $ac_cv_lbl_dag_api = yes; then

        AC_MSG_CHECKING([dagapi.o])     
        dagapi_obj=no
        if test -r $dag_tools_dir/dagapi.o; then
                # 2.4.x.
                dagapi_obj=$dag_tools_dir/dagapi.o
        elif test -r $dag_lib_dir/dagapi.o; then
                # 2.5.x.
                dagapi_obj=$dag_lib_dir/dagapi.o
        elif test -r $dag_lib_dir/libdag.a; then
                # 2.5.x.
                ar x $dag_lib_dir/libdag.a dagapi.o 2>/dev/null
                if test -r ./dagapi.o; then
                    dagapi_obj=./dagapi.o
                else
                    ar x $dag_lib_dir/libdag.a libdag_la-dagapi.o 2>/dev/null
                    if test -r ./libdag_la-dagapi.o; then
                       dagapi_obj=./libdag_la-dagapi.o
                    fi          
                fi
        fi

        if test $dagapi_obj = no; then
                AC_MSG_RESULT([no (checked $dag_lib_dir  $dag_tools_dir  $dag_lib_dir/libdag.a)])
                        ac_cv_lbl_dag_api=no
        else
                AC_MSG_RESULT([yes ($dagapi_obj)])
        fi
fi

if test $ac_cv_lbl_dag_api = yes; then

        AC_MSG_CHECKING([dagopts.o])    
        dagopts_obj=no
        if test -r $dag_tools_dir/dagopts.o; then
                # 2.4.x.
                dagopts_obj=$dag_tools_dir/dagopts.o
        elif test -r $dag_lib_dir/dagopts.o; then
                # 2.5.x.
                dagopts_obj=$dag_lib_dir/dagopts.o
        elif test -r $dag_lib_dir/libdag.a; then
                # 2.5.x.
                ar x $dag_lib_dir/libdag.a dagopts.o 2>/dev/null
                if test -r ./dagopts.o; then
                    dagopts_obj=./dagopts.o
                else
                    ar x $dag_lib_dir/libdag.a libdag_la-dagopts.o 2>/dev/null
                    if test -r ./libdag_la-dagopts.o; then
                       dagopts_obj=./libdag_la-dagopts.o
                    fi
                fi
        fi

        if test $dagopts_obj = no; then
                AC_MSG_RESULT([no (checked $dag_lib_dir  $dag_tools_dir  $dag_lib_dir/libdag.a)])
                ac_cv_lbl_dag_api=no
        else
                AC_MSG_RESULT([yes ($dagopts_obj)])
        fi
fi

if test $ac_cv_lbl_dag_api = yes; then
        # Under 2.5.x only we need to add dagreg.o.
        if test -r $dag_include_dir/dagreg.h; then
                AC_MSG_CHECKING([dagreg.o])     
                dagreg_obj=no
                if test -r $dag_lib_dir/dagreg.o; then
                        # Object file is ready and waiting.
                        dagreg_obj=$dag_lib_dir/dagreg.o
                elif test -r $dag_lib_dir/libdag.a; then
                        # Extract from libdag.a.
                        ar x $dag_lib_dir/libdag.a dagreg.o 2>/dev/null
                        if test -r ./dagreg.o; then
                                dagreg_obj=./dagreg.o
                        else
                                ar x $dag_lib_dir/libdag.a libdag_la-dagreg.o 2>/dev/null
                                if test -r ./libdag_la-dagreg.o; then
                                   dagreg_obj=./libdag_la-dagreg.o
                                fi
                        fi
                fi

                if test $dagreg_obj = no; then
                        AC_MSG_RESULT([no (checked $dag_lib_dir  $dag_lib_dir/libdag.a)])
                        ac_cv_lbl_dag_api=no
                else
                        AC_MSG_RESULT([yes ($dagreg_obj)])
                fi
        fi
fi

if test $ac_cv_lbl_dag_api = yes; then
        # Under 2.5.x only we need to add dagutil.o.
        if test -r $dag_include_dir/dagutil.h; then
                AC_MSG_CHECKING([dagutil.o])
                dagutil_obj=no
                if test -r $dag_lib_dir/dagutil.o; then
                        # Object file is ready and waiting.
                        dagutil_obj=$dag_lib_dir/dagutil.o
                elif test -r $dag_lib_dir/libdag.a; then
                        # Extract from libdag.a.
                        ar x $dag_lib_dir/libdag.a dagutil.o 2>/dev/null
                        if test -r ./dagutil.o; then
                                dagutil_obj=./dagutil.o
                        else
                                ar x $dag_lib_dir/libdag.a libdag_la-dagutil.o 2>/dev/null
                                if test -r ./libdag_la-dagutil.o; then
                                   dagutil_obj=./libdag_la-dagutil.o
                                fi
                        fi
                fi

                if test $dagutil_obj = no; then
                        AC_MSG_RESULT([no (checked $dag_lib_dir  $dag_lib_dir/libdag.a)])
                        ac_cv_lbl_dag_api=no
                else
                        AC_MSG_RESULT([yes ($dagutil_obj)])
                fi
        fi
fi

if test $ac_cv_lbl_dag_api = yes; then
        V_INCLS="$V_INCLS -I$dag_include_dir"
        ADDLARCHIVEOBJS="$ADDLARCHIVEOBJS $dagapi_obj $dagopts_obj $dagreg_obj $dagutil_obj"
        if test $V_PCAP != dag ; then
                 SSRC="pcap-dag.c"
        fi

        # See if we can find a general version string.
        # Don't need to save and restore LIBS to prevent -ldag being
        # included if there's a found-action (arg 3).
        saved_ldflags=$LDFLAGS
        LDFLAGS="-L$dag_lib_dir"
        AC_CHECK_LIB([dag], [dag_attach_stream], [dag_streams="1"], [dag_streams="0"])
        AC_CHECK_LIB([dag],[dag_get_erf_types], [
                AC_DEFINE(HAVE_DAG_GET_ERF_TYPES, 1, [define if you have dag_get_erf_types()])])
        AC_CHECK_LIB([dag],[dag_get_stream_erf_types], [
                AC_DEFINE(HAVE_DAG_GET_STREAM_ERF_TYPES, 1, [define if you have dag_get_stream_erf_types()])])
        LDFLAGS=$saved_ldflags

        if test "$dag_streams" = 1; then
                AC_DEFINE(HAVE_DAG_STREAMS_API, 1, [define if you have streams capable DAG API])
                LIBS="$LIBS -ldag"
        fi

        AC_DEFINE(HAVE_DAG_API, 1, [define if you have the DAG API])
fi

AC_MSG_CHECKING(whether we have the DAG API)

if test $ac_cv_lbl_dag_api = no; then
        AC_MSG_RESULT(no)
        if test "$want_dag" = yes; then
                # User wanted DAG support but we couldn't find it.
                AC_MSG_ERROR([DAG API requested, but not found at $dag_root: use --without-dag])
        fi

        if test "$V_PCAP" = dag; then
                # User requested "dag" capture type but the DAG API wasn't
                # found.
                AC_MSG_ERROR([Specifying the capture type as "dag" requires the DAG API to be present; use the --with-dag options to specify the location. (Try "./configure --help" for more information.)])
        fi
else
        AC_MSG_RESULT(yes)
fi

AC_ARG_WITH(septel,
AC_HELP_STRING([--with-septel@<:@=DIR@:>@],[include Septel support (located in directory DIR, if supplied).  @<:@default=yes, on Linux, if present@:>@]),
[
        if test "$withval" = no
        then
                want_septel=no
        elif test "$withval" = yes
        then
                want_septel=yes
                septel_root=
        else
                want_septel=yes
                septel_root=$withval
        fi
],[
        #
        # Use Septel API if present, otherwise don't
        #
        want_septel=ifpresent
        septel_root=./../septel
])
ac_cv_lbl_septel_api=no
case "$V_PCAP" in
linux|septel)
        #
        # We support the Septel API if we're on Linux, or if we're building
        # a Septel-only libpcap.
        #
        ;;
*)
        #
        # If the user explicitly requested Septel, tell them it's not
        # supported.
        #
        # If they expressed no preference, don't include it.
        #
        if test $want_septel = yes; then
                AC_MSG_ERROR(Septel support only available with 'linux' and 'septel' packet capture types)
        elif test $want_septel = yes; then
                want_septel=no
        fi
        ;;
esac

if test "$with_septel" != no; then
        AC_MSG_CHECKING(whether we have Septel API)

        if test -z "$septel_root"; then
                septel_root=$srcdir/../septel
        fi

        septel_tools_dir="$septel_root"
        septel_include_dir="$septel_root/INC"

        ac_cv_lbl_septel_api=no
        if test -r "$septel_include_dir/msg.h"; then
                V_INCLS="$V_INCLS -I$septel_include_dir"
                ADDLOBJS="$ADDLOBJS $septel_tools_dir/asciibin.o $septel_tools_dir/bit2byte.o $septel_tools_dir/confirm.o $septel_tools_dir/fmtmsg.o $septel_tools_dir/gct_unix.o $septel_tools_dir/hqueue.o $septel_tools_dir/ident.o $septel_tools_dir/mem.o $septel_tools_dir/pack.o $septel_tools_dir/parse.o $septel_tools_dir/pool.o $septel_tools_dir/sdlsig.o $septel_tools_dir/strtonum.o $septel_tools_dir/timer.o $septel_tools_dir/trace.o"
                ADDLARCHIVEOBJS="$ADDLARCHIVEOBJS $septel_tools_dir/asciibin.o $septel_tools_dir/bit2byte.o $septel_tools_dir/confirm.o $septel_tools_dir/fmtmsg.o $septel_tools_dir/gct_unix.o $septel_tools_dir/hqueue.o $septel_tools_dir/ident.o $septel_tools_dir/mem.o $septel_tools_dir/pack.o $septel_tools_dir/parse.o $septel_tools_dir/pool.o $septel_tools_dir/sdlsig.o $septel_tools_dir/strtonum.o $septel_tools_dir/timer.o $septel_tools_dir/trace.o"

                if test "$V_PCAP" != septel ; then
                         SSRC="pcap-septel.c"
                fi
                ac_cv_lbl_septel_api=yes
        fi

        AC_MSG_RESULT($ac_cv_lbl_septel_api)
        if test $ac_cv_lbl_septel_api = no; then
                if test "$want_septel" = yes; then
                        AC_MSG_ERROR(Septel API not found under directory $septel_root; use --without-septel)
                fi
        else
                AC_DEFINE(HAVE_SEPTEL_API, 1, [define if you have a Septel API])
        fi
fi

if test "$V_PCAP" = septel -a "$ac_cv_lbl_septel_api" = no; then
        AC_MSG_ERROR(Specifying the capture type as 'septel' requires the Septel API to be present; use --with-septel=DIR)
fi

# Check for Myricom SNF support.
AC_ARG_WITH([snf],
AC_HELP_STRING([--with-snf@<:@=DIR@:>@],[include Myricom SNF support @<:@"yes", "no" or DIR; default="yes" on BSD and Linux if present@:>@]),
[
        if test "$withval" = no
        then
                # User explicitly doesn't want SNF
                want_snf=no
        elif test "$withval" = yes
        then
                # User wants SNF support but hasn't specific a directory.
                want_snf=yes
        else
                # User wants SNF support with a specified directory.
                want_snf=yes
                snf_root=$withval
        fi
],[
        #
        # Use Sniffer API if present, otherwise don't
        #
        want_snf=ifpresent
])

AC_ARG_WITH([snf-includes],
AC_HELP_STRING([--with-snf-includes=DIR],[Myricom SNF include directory]),
[
        # User wants SNF with specific header directory
        want_snf=yes
        snf_include_dir=$withval
],[])

AC_ARG_WITH([snf-libraries],
AC_HELP_STRING([--with-snf-libraries=DIR],[Myricom SNF library directory]),
[
        # User wants SNF with specific lib directory
        want_snf=yes
        snf_lib_dir=$withval
],[])

case "$V_PCAP" in
bpf|linux|snf)
        #
        # We support the Sniffer API if we're on BSD, Linux, or if we're
        # building a Sniffer-only libpcap.
        #
        ;;
*)
        #
        # If the user explicitly requested Sniffer, tell them it's not
        # supported.
        #
        # If they expressed no preference, don't include it.
        #
        if test $want_snf = yes; then
                AC_MSG_ERROR(Myricom SNF support only available with 'bpf' 'linux' and 'snf' packet capture types)
        elif test $want_snf = yes; then
                want_snf=no
        fi
        ;;
esac

ac_cv_lbl_snf_api=no
if test "$with_snf" != no; then

        AC_MSG_CHECKING(whether we have Myricom Sniffer API)

        if test -z "$snf_root"; then
                snf_root=/opt/snf
        fi

        if test -z "$snf_include_dir"; then
                snf_include_dir="$snf_root/include"
        fi

        if test -z "$snf_lib_dir"; then
                snf_lib_dir="$snf_root/lib"
        fi

        if test -f "$snf_include_dir/snf.h"; then
                ac_cv_lbl_snf_api=yes
        fi
        AC_MSG_RESULT([$ac_cv_lbl_snf_api ($snf_root)])

        if test $ac_cv_lbl_snf_api = no; then
                if test "$want_snf" = yes; then
                        AC_MSG_ERROR(SNF API headers not found under $snf_include_dir; use --without-snf)
                fi
        else
                saved_ldflags=$LDFLAGS
                LDFLAGS="$LDFLAGS -L$snf_lib_dir"
                AC_CHECK_LIB([snf], [snf_init], [ac_cv_lbl_snf_api="yes"], [ac_cv_lbl_snf_api="no"])
                LDFLAGS="$saved_ldflags"

                if test $ac_cv_lbl_snf_api = no; then
                        if test "$want_snf" = yes; then
                                AC_MSG_ERROR(SNF API cannot correctly be linked check config.log; use --without-snf)
                        fi
                else
                        V_INCLS="$V_INCLS -I$snf_include_dir"
                        LIBS="$LIBS -lsnf"
                        LDFLAGS="$LDFLAGS -L$snf_lib_dir"
                        if test "$V_PCAP" != snf ; then
                                SSRC="pcap-snf.c"
                        fi
                        AC_DEFINE(HAVE_SNF_API, 1, [define if you have Myricom SNF API])
                fi
        fi
fi

if test "$V_PCAP" = snf -a "$ac_cv_lbl_snf_api" = no; then
        AC_MSG_ERROR(Specifying the capture type as 'snf' requires the Myricom Sniffer API to be present; use --with-snf=DIR)
fi

AC_LBL_LEX_AND_YACC(V_LEX, V_YACC, pcap_)
if test "$V_LEX" = lex ; then
# Some versions of lex can't handle the definitions section of scanner.l .
# Try lexing it and complain if it can't deal.
        AC_CACHE_CHECK([for capable lex], tcpdump_cv_capable_lex,
                if lex -t scanner.l > /dev/null 2>&1; then
                        tcpdump_cv_capable_lex=yes
                else
                        tcpdump_cv_capable_lex=insufficient
                fi)
        if test $tcpdump_cv_capable_lex = insufficient ; then
                AC_MSG_ERROR([Your operating system's lex is insufficient to compile
 libpcap.  flex is a lex replacement that has many advantages, including
 being able to compile libpcap.  For more information, see
 http://www.gnu.org/software/flex/flex.html .])
        fi
fi

#
# Assume, by default, no support for shared libraries and V7/BSD convention
# for man pages (file formats in section 5, miscellaneous info in section 7).
# Individual cases can override this.
#
DYEXT="none"
MAN_FILE_FORMATS=5
MAN_MISC_INFO=7
case "$host_os" in

aix*)
        dnl Workaround to enable certain features
        AC_DEFINE(_SUN,1,[define on AIX to get certain functions])

        #
        # AIX makes it fun to build shared and static libraries,
        # because they're *both* ".a" archive libraries.  We
        # build the static library for the benefit of the traditional
        # scheme of building libpcap and tcpdump in subdirectories of
        # the same directory, with tcpdump statically linked with the
        # libpcap in question, but we also build a shared library as
        # "libpcap.shareda" and install *it*, rather than the static
        # library, as "libpcap.a".
        #
        DYEXT="shareda"

        case "$V_PCAP" in

        dlpi)
                #
                # If we're using DLPI, applications will need to
                # use /lib/pse.exp if present, as we use the
                # STREAMS routines.
                #
                pseexe="/lib/pse.exp"
                AC_MSG_CHECKING(for $pseexe)
                if test -f $pseexe ; then
                        AC_MSG_RESULT(yes)
                        LIBS="-I:$pseexe"
                fi
                ;;

        bpf)
                #
                # If we're using BPF, we need "-lodm" and "-lcfg", as
                # we use them to load the BPF module.
                #
                LIBS="-lodm -lcfg"
                ;;
        esac
        ;;

darwin*)
        DYEXT="dylib"
        V_CCOPT="$V_CCOPT -fno-common"
        AC_ARG_ENABLE(universal,
        AC_HELP_STRING([--disable-universal],[don't build universal on OS X]))
        if test "$enable_universal" != "no"; then
                case "$host_os" in

                darwin9.*)
                        #
                        # Leopard.  Build for 32-bit PowerPC, 64-bit
                        # PowerPC, x86, and x86-64, with 32-bit PowerPC
                        # first.  (That's what Apple does.)
                        #
                        V_CCOPT="$V_CCOPT -arch ppc -arch ppc64 -arch i386 -arch x86_64"
                        LDFLAGS="$LDFLAGS -arch ppc -arch ppc64 -arch i386 -arch x86_64"
                        ;;

                darwin10.*)
                        #
                        # Snow Leopard.  Build for x86-64, x86, and
                        # 32-bit PowerPC, with x86-64 first.  (That's
                        # what Apple does, even though Snow Leopard
                        # doesn't run on PPC, so PPC libpcap runs under
                        # Rosetta, and Rosetta doesn't support BPF
                        # ioctls, so PPC programs can't do live
                        # captures.)
                        #
                        V_CCOPT="$V_CCOPT -arch x86_64 -arch i386 -arch ppc"
                        LDFLAGS="$LDFLAGS -arch x86_64 -arch i386 -arch ppc"
                        ;;
                esac
        fi
        ;;

hpux9*)
        AC_DEFINE(HAVE_HPUX9,1,[on HP-UX 9.x])

        #
        # Use System V conventions for man pages.
        #
        MAN_FILE_FORMATS=4
        MAN_MISC_INFO=5
        ;;

hpux10.0*)

        #
        # Use System V conventions for man pages.
        #
        MAN_FILE_FORMATS=4
        MAN_MISC_INFO=5
        ;;

hpux10.1*)

        #
        # Use System V conventions for man pages.
        #
        MAN_FILE_FORMATS=4
        MAN_MISC_INFO=5
        ;;

hpux*)
        dnl HPUX 10.20 and above is similar to HPUX 9, but
        dnl not the same....
        dnl
        dnl XXX - DYEXT should be set to "sl" if this is building
        dnl for 32-bit PA-RISC, but should be left as "so" for
        dnl 64-bit PA-RISC or, I suspect, IA-64.
        AC_DEFINE(HAVE_HPUX10_20_OR_LATER,1,[on HP-UX 10.20 or later])
        if test "`uname -m`" = "ia64"; then
                DYEXT="so"
        else
                DYEXT="sl"
        fi

        #
        # "-b" builds a shared library; "+h" sets the soname.
        #
        SHLIB_OPT="-b"
        SONAME_OPT="+h"

        #
        # Use System V conventions for man pages.
        #
        MAN_FILE_FORMATS=4
        MAN_MISC_INFO=5
        ;;

irix*)
        #
        # Use System V conventions for man pages.
        #
        MAN_FILE_FORMATS=4
        MAN_MISC_INFO=5
        ;;

linux*|freebsd*|netbsd*|openbsd*|dragonfly*)
        DYEXT="so"

        #
        # Compiler assumed to be GCC; run-time linker may require a -R
        # flag.
        #
        if test "$libdir" != "/usr/lib"; then
                V_RFLAGS=-Wl,-R$libdir
        fi
        ;;

osf*)
        DYEXT="so"

        #
        # Use System V conventions for man pages.
        #
        MAN_FILE_FORMATS=4
        MAN_MISC_INFO=5
        ;;

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,1,[on sinix])
            fi
        ;;

solaris*)
        AC_DEFINE(HAVE_SOLARIS,1,[On solaris])

        DYEXT="so"
        #
        # Use System V conventions for man pages.
        #
        MAN_FILE_FORMATS=4
        MAN_MISC_INFO=5
        ;;
esac

AC_PROG_RANLIB

AC_LBL_DEVEL(V_CCOPT)

AC_LBL_SOCKADDR_SA_LEN

AC_LBL_SOCKADDR_STORAGE

AC_LBL_HP_PPA_INFO_T_DL_MODULE_ID_1

AC_LBL_UNALIGNED_ACCESS

#
# Makefile.in includes rules to generate version.h, so we assume
# that it will be generated if autoconf is used.
#
AC_DEFINE(HAVE_VERSION_H, 1, [define if version.h is generated in the build procedure])

rm -f net
ln -s ${srcdir}/bpf/net net

AC_SUBST(V_CCOPT)
AC_SUBST(V_DEFS)
AC_SUBST(V_FINDALLDEVS)
AC_SUBST(V_INCLS)
AC_SUBST(V_LEX)
AC_SUBST(V_PCAP)
AC_SUBST(V_SHLIB_CMD)
AC_SUBST(V_SHLIB_OPT)
AC_SUBST(V_SONAME_OPT)
AC_SUBST(V_RPATH_OPT)
AC_SUBST(V_YACC)
AC_SUBST(ADDLOBJS)
AC_SUBST(ADDLARCHIVEOBJS)
AC_SUBST(SSRC)
AC_SUBST(DYEXT)
AC_SUBST(MAN_FILE_FORMATS)
AC_SUBST(MAN_MISC_INFO)

dnl check for USB sniffing support
AC_MSG_CHECKING(for USB sniffing support)
case "$host_os" in
linux*)
       AC_DEFINE(PCAP_SUPPORT_USB, 1, [target host supports USB sniffing])
       USB_SRC=pcap-usb-linux.c
       AC_MSG_RESULT(yes)
       ac_usb_dev_name=`udevinfo -q name -p /sys/class/usb_device/usbmon 2>/dev/null`
       if test $? -ne 0 ; then
               ac_usb_dev_name="usbmon"
       fi
       AC_DEFINE_UNQUOTED(LINUX_USB_MON_DEV, "/dev/$ac_usb_dev_name", [path for device for USB sniffing])
       AC_MSG_NOTICE(Device for USB sniffing is /dev/$ac_usb_dev_name)
       AC_CHECK_HEADERS(linux/usbdevice_fs.h)
       if test "$ac_cv_header_linux_usbdevice_fs_h" = yes; then
         #
         # OK, does it define bRequestType?  Older versions of the kernel
         # define fields with names like "requesttype, "request", and
         # "value", rather than "bRequestType", "bRequest", and
         # "wValue".
         #
         AC_MSG_CHECKING(if usbdevfs_ctrltransfer struct has bRequestType member)
         AC_CACHE_VAL(ac_cv_usbdevfs_ctrltransfer_has_bRequestType,
           AC_TRY_COMPILE([
AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif
#            include <linux/usbdevice_fs.h>],
             [u_int i = sizeof(((struct usbdevfs_ctrltransfer *)0)->bRequestType)],
             ac_cv_usbdevfs_ctrltransfer_has_bRequestType=yes,
             ac_cv_usbdevfs_ctrltransfer_has_bRequestType=no))
         AC_MSG_RESULT($ac_cv_usbdevfs_ctrltransfer_has_bRequestType)
         if test $ac_cv_usbdevfs_ctrltransfer_has_bRequestType = yes ; then
            AC_DEFINE(HAVE_USBDEVFS_CTRLTRANSFER_BREQUESTTYPE,1,
              [if struct usbdevfs_ctrltransfer has bRequestType])
         fi
       fi
       ;;
*)
       AC_MSG_RESULT(no)
       ;;
esac
AC_SUBST(PCAP_SUPPORT_USB)
AC_SUBST(USB_SRC)

AC_ARG_ENABLE([bluetooth],
[AC_HELP_STRING([--enable-bluetooth],[enable Bluetooth support @<:@default=yes, if support available@:>@])],
,enable_bluetooth=yes)

if test "x$enable_bluetooth" != "xno" ; then
        dnl check for Bluetooth sniffing support
        case "$host_os" in
        linux*)
               AC_CHECK_HEADER(bluetooth/bluetooth.h,
                [
                  AC_DEFINE(PCAP_SUPPORT_BT, 1, [target host supports Bluetooth sniffing])
                  BT_SRC=pcap-bt-linux.c
                  AC_MSG_NOTICE(Bluetooth sniffing is supported)
                ],
                AC_MSG_NOTICE(Bluetooth sniffing is not supported; install bluez-lib devel to enable it)
               )
               ;;
        *)
               AC_MSG_NOTICE(no Bluetooth sniffing support implemented for $host_os)
               ;;
        esac
        AC_SUBST(PCAP_SUPPORT_BT)
        AC_SUBST(BT_SRC)
fi

AC_ARG_ENABLE([can],
[AC_HELP_STRING([--enable-can],[enable CAN support @<:@default=yes, if support available@:>@])],
,enable_can=yes)

if test "x$enable_can" != "xno" ; then
        dnl check for CAN sniffing support
        case "$host_os" in
        linux*)
                AC_CHECK_HEADER(linux/can.h,
                        [ AC_DEFINE(PCAP_SUPPORT_CAN, 1, [target host supports CAN sniffing])
                        CAN_SRC=pcap-can-linux.c
                        AC_MSG_NOTICE(CAN sniffing is supported)],
                        AC_MSG_NOTICE(CAN sniffing is not supported),
                        [#include <sys/socket.h>]
                   )
                ;;
        *)
                AC_MSG_NOTICE(no CAN sniffing support implemented for $host_os)
                ;;
        esac
        AC_SUBST(PCAP_SUPPORT_CAN)
        AC_SUBST(CAN_SRC)
fi

AC_PROG_INSTALL

AC_CONFIG_HEADER(config.h)

AC_OUTPUT(Makefile pcap-filter.manmisc pcap-linktype.manmisc
        pcap-savefile.manfile pcap.3pcap pcap_compile.3pcap
        pcap_datalink.3pcap pcap_dump_open.3pcap
        pcap_list_datalinks.3pcap pcap_open_dead.3pcap
        pcap_open_offline.3pcap)

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