File: configure.in

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dnl Copyright (C) 1999-2000 RTFM, Inc.
dnl All Rights Reserved

dnl This package is a SSLv3/TLS protocol analyzer written by Eric Rescorla
dnl <ekr\@rtfm.com> and licensed by RTFM, Inc.

dnl Redistribution and use in source and binary forms, with or without
dnl modification, are permitted provided that the following conditions
dnl are met:
dnl 1. Redistributions of source code must retain the above copyright
dnl    notice, this list of conditions and the following disclaimer.
dnl 2. Redistributions in binary form must reproduce the above copyright
dnl    notice, this list of conditions and the following disclaimer in the
dnl    documentation and/or other materials provided with the distribution.
dnl 3. All advertising materials mentioning features or use of this software
dnl    must display the following acknowledgement:
dnl 
dnl    This product includes software developed by Eric Rescorla for
dnl    RTFM, Inc.
dnl
dnl 4. Neither the name of RTFM, Inc. nor the name of Eric Rescorla may be
dnl    used to endorse or promote products derived from this
dnl    software without specific prior written permission.
dnl
dnl THIS SOFTWARE IS PROVIDED BY ERIC RESCORLA AND RTFM, INC. ``AS IS'' AND
dnl ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
dnl IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
dnl ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
dnl FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
dnl DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
dnl OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
dnl HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
dnl LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
dnl OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY SUCH DAMAGE.
dnl Process this file with autoconf to produce a configure script.
AC_INIT(base/pcap-snoop.c)
AC_CANONICAL_SYSTEM

dnl Checks for programs.
AC_PROG_CC
AC_PROG_MAKE_SET
AC_PROG_RANLIB
AC_PROG_INSTALL

AC_MSG_RESULT(configuring for $target_os)

dnl Replace `main' with a function in -lm:
AC_CHECK_LIB(m, pow)

dnl System-specific stuff
case "$target_os" in 
linux*)
	DEFINES="$DEFINES -D_DEFAULT_SOURCE=1 -DLINUX"
	;;
solaris*)
	LIBS="$LIBS -lsocket -lnsl"
	;;
esac

RECORD_MOD="dummy"

dnl Look for PCAP
dnl We absolutely need pcap
ac_pcap_inc_dir="/usr/include /usr/include/pcap /usr/local/include"
ac_pcap_lib_dir="/usr/lib /usr/local/lib"

AC_ARG_WITH(pcap,[--with-pcap		  root location for pcap library],
	if test "$withval" = "no"; then
	   AC_MSG_ERROR(PCAP required for ssldump)
	else
		ac_pcap_inc_dir=$withval/include
		ac_pcap_lib_dir=$withval/lib
	fi
)

AC_ARG_WITH(pcap-inc,[--with-pcap-inc           PCAP include files],
	ac_pcap_inc_dir=$withval
)
AC_ARG_WITH(pcap-lib,[--with-pcap-lib        PCAP library files],
	ac_pcap_lib_dir=$withval
)

dnl Now look for it
AC_MSG_CHECKING(for PCAP include files)
ac_found_pcap_inc_dir="no"
for dir in $ac_pcap_inc_dir; do 
	if test -f $dir/pcap.h; then
		if test "$dir" != "/usr/include"; then
			INCLUDES="-I$dir $INCLUDES"
		fi
		ac_found_pcap_inc_dir=$dir
		echo "found in $dir"
		break;
	fi
done

if test "$ac_found_pcap_inc_dir" = "no"; then
	echo
	AC_MSG_ERROR(Couldn't find PCAP includes: needed for ssldump)
fi

AC_MSG_CHECKING(for PCAP library)
ac_found_pcap_lib_dir="no"
for dir in $ac_pcap_lib_dir; do
	if test -f $dir/libpcap.a; then
	dnl Ok, we think we've found them, but check that they
	dnl actually ontain the right functions
		save_LIBS=$LIBS
		save_LDFLAGS=$LDFLAGS
		LIBS="-lpcap $LIBS"
		if test "$dir" != "/usr/lib"; then
			LDFLAGS="-L$dir $LDFLAGS"
		fi
		AC_TRY_LINK_FUNC(pcap_open_live,ac_linked_libpcap="true",
			ac_linked_libpcap="false");
		if test "$ac_linked_libpcap" != "false"; then
			ac_found_pcap_lib_dir=$dir
			break
		fi
		LIBS=$save_LIBS
		LDFLAGS=$save_LDFLAGS
	fi
done

if test "$ac_found_pcap_lib_dir" = "no"; then
	echo
	AC_MSG_ERROR(Couldn't find PCAP library: needed for ssldump)
else
	echo "found in $ac_found_pcap_lib_dir"
fi
				
dnl See if we can find OpenSSL
dnl We can compile without OpenSSL if we have to
ac_use_openssl="true"
ac_openssl_lib_dir="/usr/lib /usr/local /usr/local/ssl /usr/local/ssl/lib /usr/pkg"
ac_openssl_inc_dir="/usr/include /usr/local /usr/local/ssl /usr/pkg /usr/local/ssl/include"

AC_ARG_WITH(openssl,[--with-openssl            root location for OpenSSL],
	if test "$withval" = "no"; then
	   ac_use_openssl="false"
	else
		ac_openssl_lib_dir="$withval/lib $withval"
		ac_openssl_inc_dir=$withval/include
	fi
)

AC_ARG_WITH(openssl-inc,[--with-openssl-inc        OpenSSL include files],
	ac_openssl_inc_dir=$withval
)
AC_ARG_WITH(openssl-lib,[--with-openssl-lib        OpenSSL library files],
	ac_openssl_lib_dir=$withval
)

dnl Now look for OpenSSL
if test "$ac_use_openssl" != "false"; then
	ac_found_openssl_inc_dir="no"
	AC_MSG_CHECKING(for OpenSSL include files)
	for dir in $ac_openssl_inc_dir; do
		if test -f $dir/openssl/ssl.h; then
		   ac_found_openssl_inc_dir=$dir
		   break
		fi
        done
	if test "$ac_found_openssl_inc_dir" != "no"; then
	   	echo "found in $ac_found_openssl_inc_dir"
	else
		echo "not found."
		ac_use_openssl="false"
	fi
fi

if test "$ac_use_openssl" != "false"; then
	ac_found_openssl_lib_dir="no"
	AC_MSG_CHECKING(for OpenSSL libraries)
	for dir in $ac_openssl_lib_dir; do
		found_ssl="false"
		if test -f $dir/libssl.a -a -f $dir/libcrypto.a; then
		  found_ssl="true"
		fi
		if test -f $dir/libssl.so -a -f $dir/libcrypto.so; then
		  found_ssl="true"
		fi
		if $found_ssl != "false"; then
		dnl Ok, we think we've found them, but check that they
		dnl actually ontain the right functions
		save_LIBS=$LIBS
		save_LDFLAGS=$LDFLAGS
		LIBS="-lssl -lcrypto $LIBS"
		LDFLAGS="-L$dir $LDFLAGS"
		AC_TRY_LINK_FUNC(SSL_load_error_strings,ac_linked_libssl="true",
			ac_linked_libssl="false");
		AC_TRY_LINK_FUNC(RC4_set_key,ac_linked_libcrypto="true",
			ac_linked_libcrypto="false");
		if test "$ac_linked_libssl" != "false" -a \
			"$ac_linked_libcrypto" != "false"; then
				ac_found_openssl_lib_dir=$dir
				break
		fi
		LIBS=$save_LIBS
		LDFLAGS=$save_LDFLAGS
		fi
	done
	if test "$ac_found_openssl_lib_dir" != "no"; then
	   	echo "found in $ac_found_openssl_lib_dir"
		INCLUDES="-I$ac_found_openssl_inc_dir $INCLUDES"
		DEFINES="-DOPENSSL $DEFINES"
	else
		echo "not found."
		ac_use_openssl="false"
	fi
fi

if test "$ac_use_openssl" = "false"; then
	AC_MSG_WARN(compiling without OpenSSL)
fi	

AC_ARG_WITH(record,[--with-record	Compile with record module (EKR Use Only)],
	DEFINES="-DENABLE_RECORD $DEFINES"
	RECORD_MOD="record"
)

dnl Replace `main' with a function in -lpcap:
AC_CHECK_LIB(pcap, pcap_open)


dnl Checks for header files.
AC_CHECK_HEADERS(sys/time.h)
AC_HEADER_STDC

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

dnl Find a 4-byte integer size
AC_CHECK_SIZEOF(unsigned short)
AC_CHECK_SIZEOF(unsigned int)
AC_CHECK_SIZEOF(unsigned long)
AC_CHECK_SIZEOF(unsigned long long)

dnl Checks for library functions.
AC_FUNC_MEMCMP
AC_TYPE_SIGNAL
AC_FUNC_VPRINTF
AC_CHECK_FUNCS(strdup)


AC_SUBST(RECORD_MOD)
AC_SUBST(INCLUDES)
AC_SUBST(DEFINES)
AC_OUTPUT(Makefile)