tcpreplay/configure.in

dnl $Id: configure.in 1578 2006-08-08 04:02:14Z aturner $

AC_INIT(tcpreplay)
AC_CONFIG_SRCDIR(src/tcpreplay.c)
AM_CONFIG_HEADER(src/config.h)
AC_CONFIG_AUX_DIR(config)
AM_MAINTAINER_MODE
AM_WITH_DMALLOC
AC_PROG_LIBTOOL

dnl Set version info here!
MAJOR_VERSION=3
MINOR_VERSION=0
MICRO_VERSION=beta11
TCPREPLAY_VERSION=$MAJOR_VERSION.$MINOR_VERSION.$MICRO_VERSION

dnl Release is only used for the RPM spec file
TCPREPLAY_RELEASE=1

AC_DEFINE(PACKAGE, [tcpreplay], [This is our package name])
AC_DEFINE_UNQUOTED(VERSION, "$TCPREPLAY_VERSION", [What is our version?])
AC_SUBST(TCPREPLAY_VERSION)
AC_SUBST(TCPREPLAY_RELEASE)

CFLAGS="$CFLAGS -Wall -O2 -funroll-loops -std=gnu99" # -std=c99 -Wno-variadic-macros"

dnl Determine OS
AC_CANONICAL_BUILD
AC_CANONICAL_HOST
AC_CANONICAL_TARGET
AC_SUBST(host)
AC_SUBST(build)
AC_SUBST(target)

AM_INIT_AUTOMAKE(tcpreplay, $TCPREPLAY_VERSION, nodefine)

dnl Checks for programs.
AC_PROG_INSTALL
AC_PROG_LIBTOOL
AC_PROG_CC
AC_PROG_CC_STDC
AC_PROG_CXX
AC_PROG_CPP
AC_PROG_LN_S
AC_PROG_RANLIB
AC_PROG_AWK
AC_PROG_MAKE_SET
AC_EXEEXT
AC_PATH_PROG(PRINTF, printf)
AC_PATH_PROG(FIG2DEV, fig2dev)

dnl Look for lyx in the normal locations
dnl The OS X installer puts Lyx at /Applications/Lyx.app/Contents/MacOS/LyX

AC_ARG_WITH(lyx,
    AC_HELP_STRING([--with-lyx=FILE], [Path to Lyx binary]),
    [ AC_MSG_CHECKING(for lyx)
    if test -x $withval ; then
          td=$withval
          AC_MSG_RESULT($td)
      else
          AC_MSG_RESULT([Error: $withval does not exist or is not executable])
      fi ],
    [ 
    case $host in
        powerpc-apple-darwin*)
        lyx=/Applications/Lyx.app/Contents/MacOS/LyX
        if test -x $lyx ; then
            AC_MSG_CHECKING(for lyx)
            AC_SUBST(LYX, $lyx)
            AC_MSG_RESULT($lyx) 
        else
	    AC_PATH_PROG(LYX, lyx)
	fi
        ;;

        *)
        AC_PATH_PROG(LYX, lyx)
        ;;
        esac
    ])

AC_PATH_PROG(DVIPS, dvips)
AC_PATH_PROG(TEXI2DVI, texi2dvi)
AC_PATH_PROG(LATEX2HTML, latex2html)
AC_PATH_PROG(DVIPDFM, dvipdfm)
AC_PATH_PROG(AUTOGEN, autogen)

AC_HEADER_STDC
AC_HEADER_MAJOR

dnl Checks for typedefs, structures, and compiler characteristics.
AC_TYPE_SIZE_T
AC_HEADER_TIME
AC_C_CONST
AC_C_INLINE
AC_SYS_LARGEFILE

dnl Check for functions
AC_FUNC_FSEEKO

dnl Check for types.
AC_CHECK_TYPE(u_int8_t, uint8_t)
AC_CHECK_TYPE(u_int16_t, uint16_t)
AC_CHECK_TYPE(u_int32_t, uint32_t)
AC_CHECK_TYPE(u_int64_t, uint64_t)

dnl Check for other header files
AC_CHECK_HEADERS([fcntl.h stddef.h sys/socket.h  arpa/inet.h sys/time.h signal.h string.h strings.h sys/types.h sys/select.h netinet/in.h poll.h sys/poll.h unistd.h])

dnl Checks for libraries.
AC_CHECK_LIB(socket, socket)
AC_CHECK_LIB(nsl, gethostbyname)
AC_CHECK_LIB(rt, nanosleep)

dnl Checks for library functions.
AC_FUNC_MALLOC
AC_FUNC_MEMCMP
AC_TYPE_SIGNAL
AC_FUNC_VPRINTF
AC_CHECK_FUNCS([gettimeofday ctime memset regcomp strdup strerror strtol strncpy strtoull poll ntohll mmap snprintf vsnprintf])

dnl Look for strlcpy since some BSD's have it
AC_CHECK_FUNCS([strlcpy],have_strlcpy=true,have_strlcpy=false)
AM_CONDITIONAL(SYSTEM_STRLCPY, [test x$have_strlcpy = xtrue])

AC_CHECK_MEMBERS([struct timeval.tv_sec])

AC_C_BIGENDIAN

doctools=no
if test -n "$FIG2DEV" -a -n "$LYX" -a -n "$DVIPS" -a -n "$TEXI2DVI" \
	 -a -n "$LATEX2HTML" -a -n "$DVIPDFM" ; then
    doctools=yes
fi
AM_CONDITIONAL(HAVE_DOCTOOLS, test $doctools = yes)

dnl Enable debugging in code/compiler options
debug=no
AC_ARG_ENABLE(debug,
    AC_HELP_STRING([--enable-debug], [Enable debugging code and support for the -d option]),
    [ if test x$enableval = xyes; then
         debug=yes
		# check for gcc 4.0 flags -Wfatal-errors & -Wno-variadic-macros support
		CFLAGS="-ggdb -std=gnu99 -Wall -Wextra -Wfatal-errors -Wno-variadic-macros"
		 AC_COMPILE_IFELSE([#include <stdlib.h>
			int main(int argc, char *argv[]) { return(0); }], 
			[CFLAGS="-ggdb -std=gnu99 -Wall -Wextra -Wfatal-errors -Wno-variadic-macros"],
			[CFLAGS="-ggdb -std=gnu99 -Wall -Wextra"])
# We may also want to add:
#         -Wformat-security -Wswitch-default -Wunused-paramter -Wpadded"
         AC_SUBST(debug_flag)
         AC_DEFINE([DEBUG], [1], [Enable debuging code and support for the -d option]) 
      fi])

AC_ARG_ENABLE(pedantic,
    AC_HELP_STRING([--enable-pedantic], [Enable gcc's -pedantic option]),
    [ if test x$enableval = xyes; then
        CFLAGS="$CFLAGS -pedantic"
      fi ])

dnl Enable Efense
AC_ARG_ENABLE(efence,
    AC_HELP_STRING([--enable-efence], [Enable Electric Fence memory debugger]),
    [ if test x$enableval = xyes; then
          CFLAGS="$CFLAGS -lefence"
          AC_DEFINE([EFENCE], [1], [Enable Electric Fence memory debugger])
      fi])

dnl Enable Gprof
AC_ARG_ENABLE(gprof,
    AC_HELP_STRING([--enable-gprof], [Enable GNU Profiler]),
    [ if test x$enableval = xyes; then
          if test $debug = yes; then
              CFLAGS="$CFLAGS -pg"
          else 
              # GPROF requires gdb
              CFLAGS="$CFLAGS -ggdb -pg -fprofile-arcs"
          fi
          AC_DEFINE([GPROF], [1], [Enable GNU Profiler])
      fi])

dnl Use 64bits for packet counters
AC_ARG_ENABLE(64bits,
    AC_HELP_STRING([--enable-64bits], [Use 64bit packet counters]),
    [ if test x$enableval = xyes; then
         AC_DEFINE([ENABLE_64BITS], [1], [Use 64bit packet counters])
         AC_MSG_NOTICE([Using u_int64_t for packet counters])
      else
         AC_MSG_NOTICE([Using u_int32_t for packet counters])
      fi
    ])

disable_bpf=no
dnl Turn off *BSD's BPF
AC_ARG_ENABLE(bpf,
	AC_HELP_STRING([--disable-bpf], [Disable BPF for sending packets]),
	[ disable_bpf=yes ])
	
disable_pf=no
dnl Turn off Linux's PF_PACKET
AC_ARG_ENABLE(pf,
	AC_HELP_STRING([--disable-pf], [Disable Linux PF_PACKET for sending packets]),
	[ if test x$enableval = xno ; then
		disable_pf=yes
	  fi
	])
	
disable_libnet=no
dnl Turn of Libnet
AC_ARG_ENABLE(libnet,
	AC_HELP_STRING([--disable-libnet], [Disable Libnet for sending packets]),
	[ if test x$enableval = xno ; then
		disable_libnet=yes
	  fi
	])
	
disable_pcap=no
dnl Turn off pcap for sending
AC_ARG_ENABLE(pcap,
	AC_HELP_STRING([--disable-pcap], [Disable Libpcap for sending packets]),
	[ if test x$enableval = xno ; then
		disable_pcap=yes
	  fi
	])

dnl Dynamic link libraries
dynamic_link=no
AC_ARG_ENABLE(dynamic-link,
    AC_HELP_STRING([--enable-dynamic-link], [Dynamically link libraries]),
    [ if test x$enableval = xyes; then
        AC_DEFINE([ENABLE_DYNAMIC_LINK], [1], [Enable dynamically linking libs])
        dynamic_link=yes
      fi
    ])

dnl Check for inet_aton and inet_pton
AC_CHECK_FUNC(inet_aton, 
    AC_DEFINE([HAVE_INET_ATON], [1], [Do we have inet_aton?]) 
    inet_aton=yes, 
    inet_aton=no)
AC_CHECK_FUNC(inet_pton, 
    AC_DEFINE([HAVE_INET_PTON], [1], [Do we have inet_pton?]) 
    inet_pton=yes, 
    inet_pton=no)
AC_CHECK_FUNC(inet_ntop, 
    AC_DEFINE([HAVE_INET_NTOP], [1], [Do we have inet_ntop?]) 
    inet_ntop=yes, 
    inet_ntop=no)

if test "$inet_ntop" = "no" -a "$inet_pton" = "no" ; then
	AC_MSG_ERROR([We need either inet_ntop or inet_pton])
fi

if test "$inet_aton" = "no" ; then
    AC_MSG_ERROR([We need inet_aton])
fi

AC_CHECK_FUNC(inet_addr, 
    AC_DEFINE([HAVE_INET_ADDR], [1], [Do we have inet_addr?]) 
    inet_addr=yes, 
    inet_addr=no)

if test x$inet_addr = no ; then
    AC_MSG_ERROR([We need inet_addr.  See bug 26])
fi

dnl Enable flowreplay
flowreplay=no
AC_ARG_ENABLE(flowreplay,
    AC_HELP_STRING([--enable-flowreplay], [Enable building flowreplay (alpha)]),
    [ if test x$enableval = xyes; then
         flowreplay=yes
         AC_DEFINE([ENABLE_FLOWREPLAY], [1], [Enable building flowreplay (alpha)]) 
      fi])

AM_CONDITIONAL(ENABLE_FLOWREPLAY, [test x$flowreplay = xyes])

dnl ##################################################
dnl Checks for libnet (shamelessly horked from dsniff)
dnl ##################################################
foundnet=no
if test $disable_libnet = no ; then 

	trynetdir=/usr/local
	AC_MSG_CHECKING(for libnet)
	AC_ARG_WITH(libnet,
	    AC_HELP_STRING([--with-libnet=DIR], [Use libnet in DIR]),
	    [trynetdir=$withval])

	for testdir in $trynetdir /usr/local /usr ; do
	    if test -f "${testdir}/include/libnet.h" -a $foundnet = no ; then
	     LNETINC="${testdir}/include/libnet.h"
	     LNETINCDIR="$testdir/include"
	     if test $dynamic_link = yes; then
	         LNETLIB="-L${testdir}/lib -lnet"
	     elif test -f "${testdir}/lib64/libnet.a" ; then
	         LNETLIB="${testdir}/lib64/libnet.a"
	     else
	         LNETLIB="${testdir}/lib/libnet.a"
	     fi
	     foundnet=$testdir
	    fi
	done

	if test $foundnet = no ; then
	    AC_MSG_RESULT(no)
	else 
	    AC_MSG_RESULT($foundnet) 
		AC_DEFINE([HAVE_LIBNET], [1], [Enable libnet support])
	fi

	AC_SUBST(LNETINC)
	AC_SUBST(LNETLIB)
fi

dnl END OF if $disable_libnet = no ; then

if test $foundnet = yes ; then
	OLDLIBS="$LIBS"
	OLDCFLAGS="$CFLAGS"
	LIBS="$LNETLIB"
	CFLAGS="$CFLAGS -I$LNETINCDIR"


	dnl Check to see what version of libnet
	dnl this code has been reduced a lot, but probably still could be
	dnl reduced quite a bit more if we chose too
	AC_MSG_CHECKING(for libnet version)

	AC_TRY_RUN([
#include <string.h>
#define LIBNET_LIL_ENDIAN 1
#include "$LNETINC"
#define LIB_TEST "1.0"
	/* 
	 * simple proggy to test the version of libnet
	 * returns zero if it's 1.0.x 
	 * or one otherwise
	 */
	int
	main (int argc, char *argv[])
	{
	        if (strncmp(LIB_TEST, LIBNET_VERSION, 3) == 0)
	                exit(0);
	        exit(1);
	}],
	        libnet_ver_10=yes
	        AC_MSG_RESULT(1.0.x), 
	        libnet_ver_10=no,
	        libnet_ver_10=no
	        )

	AC_TRY_RUN([
#include <string.h>
#include "$LNETINC"
#define LIB_TEST "1.1"
	/* 
	 * simple proggy to test the version of libnet
	 * returns zero if it's 1.0.x 
	 * or one otherwise
	 */
	int
	main (int argc, char *argv[])
	{
	        if (strncmp(LIB_TEST, LIBNET_VERSION, 3) == 0)
	                exit(0);
	        exit(1);
	}],
	        libnet_ver_11=yes
	        AC_MSG_RESULT(1.1.x), 
	        libnet_ver_11=no,
	        libnet_ver_11=no
	        )


	if test $libnet_ver_10 = no -a $libnet_ver_11 = no ; then
	        AC_MSG_RESULT(unknown)
	        AC_MSG_ERROR(Unable to determine version of libnet)
	fi

	if test $libnet_ver_10 = yes ; then
	          AC_MSG_ERROR(Libnet version 1.0.x is no longer supported.
	                Please upgrade to 1.1.0 or better)
	fi


	dnl restore LIBS & CFLAGS
	LIBS="$OLDLIBS"
	CFLAGS="$OLDCFLAGS"

fi 

dnl END OF if test $foundnet = yes

dnl #####################################################
dnl Checks for libpcap
dnl #####################################################
foundpcap=no
trypcapdir=/usr/local
AC_MSG_CHECKING(for libpcap)
AC_ARG_WITH(libpcap,
    AC_HELP_STRING([--with-libpcap=DIR], [Use libpcap in DIR]),
    [trypcapdir=$withval])

    for testdir in $trypcapdir /usr/local /usr ; do 
 
     if test -f "${testdir}/include/pcap.h" -a $foundpcap = no ; then
         LPCAPINC="${testdir}/include/pcap.h"
         LPCAPINCDIR="${testdir}/include"
         if test $dynamic_link = yes; then
             LPCAPLIB="-L${testdir}/lib -lpcap"
         elif test -f "${testdir}/lib64/libpcap.a" ; then
             LPCAPLIB="${testdir}/lib64/libpcap.a"
         else
             LPCAPLIB="${testdir}/lib/libpcap.a"
         fi
        foundpcap=$testdir
     fi
   done

   if test $foundpcap = no ; then
     AC_MSG_RESULT(no)
     AC_ERROR(libpcap not found)
   else
     AC_MSG_RESULT($foundpcap)
   fi

AC_SUBST(LPCAPINC)
AC_SUBST(LPCAPLIB)

dnl Checks to see what version of libpcap we've got
OLDLIBS="$LIBS"
OLDCFLAGS="$CFLAGS"
LIBS="$LPCAPLIB"
CFLAGS="$CFLAGS -I$LPCAPINCDIR"


have_libnet=no
dnl Check to see what version of libpcap
dnl this code has been reduced a lot, but probably still could be
dnl reduced quite a bit more if we chose too
AC_MSG_CHECKING(for libpcap version)

AC_TRY_RUN([
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "$LPCAPINC"
#define PCAP_TEST "0.5"
/* 
 * simple proggy to test the version of libpcap
 * returns zero if version >= 0.5
 * or one otherwise
 */
extern char pcap_version[];
int
main (int argc, char *argv[])
{
        if (strncmp(pcap_version, PCAP_TEST, 3) >= 0)
                exit(0);
        exit(1);
}],
        libpcap_ver=yes
        AC_MSG_RESULT(>= 0.5),
        libpcap_ver=no
        AC_MSG_RESULT(< 0.5),
        libpcap_ver=no
		AC_MSG_RESULT(< 0.5)
        )


if test $libpcap_ver = no ; then
        AC_MSG_ERROR(Libpcap versions < 0.5 are not supported.
        Please upgrade to version 0.5 or better)
fi

dnl Check to see if we've got pcap_datalink_val_to_name()
AC_MSG_CHECKING(for pcap_datalink_val_to_description)
AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "$LPCAPINC"

int 
main(int argc, char *argv[]) {
    pcap_datalink_val_to_description(1);
    exit(0);
}],
    have_dlt_to_desc=yes 
    AC_MSG_RESULT(yes), 
    have_dlt_to_desc=no
    AC_MSG_RESULT(no),
    have_dlt_to_desc=no
	AC_MSG_RESULT(no)
    )

if test $have_dlt_to_desc = yes ; then
    AC_DEFINE([HAVE_DLT_VAL_TO_DESC], [1], 
              [Does libpcap have dlt_val_to_desc?])
fi

dnl This message is placed here for continuity purposes
dnl but things are really set above in the libnet section
AC_MSG_CHECKING(for libnet packet sending support)
if test $disable_libnet = no -a $foundnet != no ; then
	AC_MSG_RESULT(yes)
	AC_DEFINE([HAVE_LIBNET], [1], [Do we support libnet for sending packets?])
	have_libnet=yes
else 
	AC_MSG_RESULT(no)
fi

have_pcap_inject=no
dnl Check to see if we've got pcap_inject()
AC_MSG_CHECKING(for pcap_inject sending support)
AC_TRY_COMPILE([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "$LPCAPINC"
],[
	pcap_t *pcap;
	char *buf;
    pcap_inject(pcap, (void *)buf, 0);
],[
	if test $disable_pcap = no ; then
		AC_DEFINE([HAVE_PCAP_INJECT], [1], 
	              [Does libpcap have pcap_inject?])
		AC_MSG_RESULT(yes)
		have_pcap_inject=yes
	else
		AC_MSG_RESULT(no)
	fi
],[
	AC_MSG_RESULT(no)
])

have_pcap_sendpacket=no
dnl Check to see if we've got pcap_sendpacket()
AC_MSG_CHECKING(for pcap_sendpacket sending support)
AC_TRY_COMPILE([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "$LPCAPINC"
],[
	pcap_t *pcap;
	u_char *buf;
    pcap_sendpacket(pcap, buf, 0);
],[
	if test $disable_pcap = no ; then
		AC_DEFINE([HAVE_PCAP_SENDPACKET], [1], 
	              [Does libpcap have pcap_sendpacket?])
		AC_MSG_RESULT(yes)
		have_pcap_sendpacket=yes
	else 
		AC_MSG_RESULT(no)
	fi
],[
	AC_MSG_RESULT(no)
])

have_pf=no
dnl Check for linux PF_PACKET support
AC_MSG_CHECKING(for PF_PACKET socket sending support)
AC_TRY_COMPILE([
#include <sys/socket.h>
#include <netpacket/packet.h>
#include <net/ethernet.h>     /* the L2 protocols */
#include <netinet/in.h>       /* htons */
],[
	int pf_socket;
	pf_socket = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
],[
    if test $disable_pf = no ; then
		AC_DEFINE([HAVE_PF_PACKET], [1],
			[Do we have Linux PF_PACKET socket support?])
		AC_MSG_RESULT(yes)
		have_pf=yes
	else
		AC_MSG_RESULT(no)
	fi
],[
	AC_MSG_RESULT(no)
])

have_bpf=no
dnl Check for BSD's BPF
AC_MSG_CHECKING(for BPF device sending support)
AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#include <net/bpf.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <net/bpf.h>
#include <errno.h>

int 
main(int argc, char *argv[]) {
	int fd;
	
	fd = open("/dev/bpf0", O_RDONLY, 0);
	
	/* if we opened it, we're good */
	if (fd > 1)
		exit(0);
		
	/* if we got EBUSY or permission denied it exists, so we're good */
	if (fd < 0 && (errno == EBUSY || errno == 13))
		exit(0);
		
	/* else suck, no good */
    exit(-1);
}],
	[
	if test $disable_bpf = no ; then
	    AC_DEFINE([HAVE_BPF], [1], 
	              [Do we have BPF device support?])
		AC_MSG_RESULT(yes)
		have_bpf=yes
	else
		AC_MSG_RESULT(no)
	fi
	])


dnl Make sure we have a valid packet injection mechanisim
if test $have_bpf = no -a $have_pcap_inject = no -a $have_pcap_sendpacket = no \
	-a $have_libnet = no -a $have_pf = no ; then
	AC_MSG_ERROR([Unable to find a supported method to send packets])
fi

dnl Libpcap support doesn't give us a method to get the hardware address of the
dnl interfaces which prevents us from doing proper filtering to prevent bridging loops
enable_tcpbridge=yes
if test $have_bpf = no -a $have_libnet = no -a $have_pf = no ; then
	AC_MSG_NOTICE([tcpbridge support disabled without BPF, Libnet or Linux PF_PACKET])
	enable_tcpbridge=no
fi

AM_CONDITIONAL(ENABLE_TCPBRIDGE, [test $enable_tcpbridge = yes])

dnl Older versions of libpcap are missing some DLT types
dnl If doesn't exist, we'll define them in src/common/fakepcap.h
AC_MSG_CHECKING(for DLT_LINUX_SLL in libpcap)
AC_TRY_COMPILE([#include "$LPCAPINC"], 
               [ int foo;
                 foo = DLT_LINUX_SLL ],
                [ AC_DEFINE([HAVE_DLT_LINUX_SLL], [1], 
					[Does pcap.h include a header with DLT_LINUX_SLL?])
                  AC_MSG_RESULT(yes)
                ], 
                AC_MSG_RESULT(no)
               )

AC_MSG_CHECKING(for DLT_C_HDLC in libpcap)
AC_TRY_COMPILE([#include "$LPCAPINC"],
               [ int foo;
                 foo = DLT_C_HDLC ],
                [ AC_DEFINE([HAVE_DLT_C_HDLC], [1], 
					[Does pcap.h include a header with DLT_C_HDLC?])
                  AC_MSG_RESULT(yes)
                ],
                AC_MSG_RESULT(no)   
               )

PCAP_BPF_H_FILE="$LPCAPINCDIR/pcap-bpf.h"
AC_MSG_CHECKING(for $PCAP_BPF_H_FILE)
AC_TRY_COMPILE([#include <sys/types.h>
                #include <sys/time.h>
                #include "$PCAP_BPF_H_FILE"],
               [ int foo;
                 foo = BPF_MAJOR_VERSION; ],
               [ AC_DEFINE([INCLUDE_PCAP_BPF_HEADER], [1],
                           [What is the path (if any) to the pcap-bpf.h
                            header?])
                 AC_MSG_RESULT(yes)
                 AC_SUBST(PCAP_BPF_H_FILE)
               ],
               AC_MSG_RESULT(no)
               )

dnl restore LIBS & CFLAGS
LIBS="$OLDLIBS"
CFLAGS="$OLDCFLAGS"


dnl ##################################################
dnl # Check for pcapnav
dnl ##################################################
pcapnav_ver=no
pcncfg=no
AC_ARG_WITH(pcapnav-config,
    AC_HELP_STRING([--with-pcapnav-config=FILE], [Use given pcapnav-config]),
    [ AC_MSG_CHECKING(for pcapnav-config)
    if test -x $withval ; then
	pcncfg=$withval
	AC_MSG_RESULT($pcncfg)
    elif test x$withval = xno ; then
	AC_MSG_RESULT(no)
	else
	AC_MSG_RESULT([Can't find pcapnav-config: disabling offset jump feature])
    fi ],
    [ AC_PATH_PROG(pcncfg,[pcapnav-config], [no] ) ]
)

if test $pcncfg != no ; then
    LNAVLIB=`$pcncfg --libs`
    LNAV_CFLAGS=`$pcncfg --cflags`
    PCAPNAV_VERSION=`$pcncfg --version`
    AC_SUBST(LNAVLIB)
    AC_SUBST(LNAV_CFLAGS)
    AC_DEFINE_UNQUOTED(PCAPNAV_VERSION, "$PCAPNAV_VERSION", 
                       [libpcapnav's version?])

dnl Check to see what version of libpcapnav
dnl this code has been reduced a lot, but probably still could be
dnl reduced quite a bit more if we chose too
        AC_MSG_CHECKING(for libpcapnav version)
        AC_TRY_RUN([
#include <string.h>
#define PCAPNAV_TEST "0.4"
/* 
 * simple proggy to test the version of libpcapnav
 * returns zero if version >= 0.4
 * or one otherwise
 */

int
main (int argc, char *argv[])
{
	if (strncmp(PCAPNAV_VERSION, PCAPNAV_TEST, 3) >= 0)
		exit(0);
	exit(1);
}],
     	libpcapnav_ver=yes
       	AC_MSG_RESULT(>= 0.4),
       	libpcapnav_ver=no
       	AC_MSG_RESULT(< 0.4),
       	libpcapnav_ver=no
       	)


if test x$libpcapnav_ver = xno ; then
     	AC_MSG_WARN([Libpcapnav versions < 0.4 are not supported.
    Please upgrade to version 0.4 or better.
    Disabling offset jump feature.])
else
    AC_DEFINE([HAVE_PCAPNAV], [1], [Do we have libpcapnav?])
fi

fi # checking pcapnav version


dnl (shamelessly ripped off from libpcap)
dnl Checks to see if unaligned memory accesses fail
dnl
dnl     FORCE_ALIGN (DEFINED)
dnl
AC_MSG_CHECKING(for requires strict byte alignment)
AC_CACHE_VAL(unaligned_fail,
        [case "$host_cpu" in

        # XXX: should also check that they don't do weird things (like on arm)
        alpha*|arm*|hp*|mips*|sparc*|ia64)
                unaligned_fail=yes
                ;;

        *)
                cat >conftest.c <<EOF
		#include <sys/types.h>
		#include <sys/wait.h>
		#include <stdio.h>
                unsigned char a[[5]] = { 1, 2, 3, 4, 5 };
                main() {
                unsigned int i;
                pid_t pid;
                int status;
                /* avoid "core dumped" message */
                pid = fork();
                if (pid <  0)
                        exit(2);
                if (pid > 0) {
                        /* parent */
                        pid = waitpid(pid, &status, 0);
                        if (pid < 0)
                                exit(3);
                        exit(!WIFEXITED(status));
                }
                /* child */
                i = *(unsigned int *)&a[[1]];
                printf("%d\n", i);
                exit(0);
                }
EOF
                ${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS \
                    conftest.c $LIBS >/dev/null 2>&1
                if test ! -x conftest ; then
                        dnl failed to compile for some reason
                        unaligned_fail=yes
                else
                        ./conftest >conftest.out
                        if test ! -s conftest.out ; then
                                unaligned_fail=yes
                        else
                                unaligned_fail=no
                        fi
                fi
                rm -f conftest* core core.conftest
                ;;
        esac])
    AC_MSG_RESULT($unaligned_fail)
    if test $unaligned_fail = yes ; then
            AC_DEFINE([FORCE_ALIGN],[1],[Are we strictly aligned?])
    fi

dnl ##################################################
dnl # Check for tcpdump.
dnl ##################################################

td=no
AC_ARG_WITH(tcpdump,
    AC_HELP_STRING([--with-tcpdump=FILE], [Path to tcpdump binary]),
    [ if test -x $withval ; then
          td=$withval
          AC_MSG_RESULT([Using tcpdump in $td])
      else
          AC_MSG_RESULT([Error: $withval does not exist or is not executable])
      fi ],
    [ AC_PATH_PROG(td, tcpdump, "no", [$PATH:/usr/sbin:/sbin:/usr/local/sbin]) ])
           

if test "$td" = "no"; then
    AC_MSG_WARN([Unable to find tcpdump.  Please specify --with-tcpdump.
                 Disabling verbose reporting.])
else
    AC_DEFINE([HAVE_TCPDUMP], [1], [Do we have tcpdump?])
    AC_DEFINE_UNQUOTED(TCPDUMP_BINARY, "$td", [The tcpdump binary initially used])
fi

dnl No 'make test' when cross compile

AC_MSG_CHECKING( for 'make test' profile)
if test "$host" != "$build" ; then
	AC_MSG_WARN(Unable to do tests when cross-compiling)
fi

dnl Allows user to choose which nic to use for testing purposes
AC_ARG_WITH(testnic,
    AC_HELP_STRING([--with-testnic=NIC], [Select which network card to use for testing]),
    [ nic1=$withval
      nic2=$withval
      AC_MSG_RESULT([Using --with-testnic=$withval])],
    [
dnl these need to be dynamic based on OS
case $host in
	*-*-linux*)
	nic1=eth0
	nic2=eth0
	AC_MSG_RESULT(Linux)
	;;

	*-*-solaris*)
	nic1=hme0
	nic2=hme0
	AC_MSG_RESULT(Solaris)
	;;

	*-*-sunos*)
	nic1=hme0
	nic2=hme0
	AC_MSG_RESULT(SunOS)
	;;

	powerpc-apple-darwin*)
	nic1=en0
	nic2=en0
	AC_MSG_RESULT(Apple OS X)
	;;

    *-*-openbsd*)
    nic1=xl0
    nic2=xl0
    AC_MSG_RESULT(OpenBSD)
    ;;

	*)
	AC_MSG_RESULT([$host is unknown!  
	Please use --with-nictest to select an interface for 'make test'])
	;;
esac])


AC_ARG_WITH(testnic2,
    AC_HELP_STRING([--with-testnic2=NIC2], [Select an optional 2nd network card to use for testing]),
    [ nic2=$withval ])

AC_MSG_NOTICE([Using $nic1 for 1st test network interface card])
AC_MSG_NOTICE([Using $nic2 for 2nd test network interface card])
AC_SUBST(nic1)
AC_SUBST(nic2)

LIBOPTS_CHECK

AC_OUTPUT([Makefile
           doxygen.cfg
           lib/Makefile
           docs/Makefile
           src/Makefile
           src/common/Makefile
           src/tcpedit/Makefile
           src/flow/Makefile
           src/defines.h
           test/Makefile
           test/config
           scripts/Makefile
           tcpreplay.spec])

if test $doctools = no; then
    AC_MSG_NOTICE([One or more tool for creating documentation is unavailable.])
    AC_MSG_NOTICE([This is only an issue for developers, so don't worry.])
fi