#!/bin/bash

#+--------------------------------------------------------------------------------------------
#|Description:  This shell script used download and compile stunnel for ARM
#|     Author:  GuoWenxue <guowenxue@gmail.com>
#|  ChangeLog:
#|           1, Initialize 1.0.0 on 2018.08.16
#+--------------------------------------------------------------------------------------------

PREFIX_PATH=`pwd`/../install/

LYFTP_SRC=ftp://master.iot-yun.club/src/

CROSSTOOL=/opt/crosstool/cortex-a7/bin/arm-linux-gnueabi-

function msg_banner()
{
    echo ""
    echo "+-----------------------------------------------------------------------"
    echo "|  $1 "
    echo "+-----------------------------------------------------------------------"
    echo ""
}

function check_result()
{
    if [ $? != 0 ] ; then
       echo ""
       echo "+-----------------------------------------------------------------------"
       echo "|  $1 "
       echo "+-----------------------------------------------------------------------"
       echo ""
       exit ;
    fi
}

function export_cross()
{
    # export cross toolchain
    export CC=${CROSSTOOL}gcc
    export CXX=${CROSSTOOL}g++
    export AS=${CROSSTOOL}as
    export AR=${CROSSTOOL}ar
    export LD=${CROSSTOOL}ld
    export NM=${CROSSTOOL}nm
    export RANLIB=${CROSSTOOL}ranlib
    export OBJDUMP=${CROSSTOOL}objdump
    export STRIP=${CROSSTOOL}strip

    # export cross configure 
    export CONFIG_CROSS=" --build=i686-pc-linux --host=arm-linux "

    # Clear LDFLAGS and CFLAGS
    export LDFLAGS=
    export CFLAGS=
}


function compile_stunnel()
{
    SRC_NAME=stunnel-5.55
    PACK_SUFIX=tar.gz

    if [ -f ${PREFIX_PATH}/bin/stunnel ] ; then
        return 0;
    fi

    msg_banner "Start cross compile $SRC_NAME "

    if [ ! -f ${SRC_NAME}.${PACK_SUFIX} ] ; then
        #wget http://www.usenix.org.uk/mirrors/stunnel/${SRC_NAME}.${PACK_SUFIX}
        wget ${LYFTP_SRC}/${SRC_NAME}.${PACK_SUFIX}

        check_result "ERROR: download ${SRC_NAME} failure"
    fi

    tar -xzf ${SRC_NAME}.${PACK_SUFIX}
    cd ${SRC_NAME}

    # fix can't load library 'libssp.so.0' bug
    sed -i -e "s/fstack-protector/pthread/g" configure

    ./configure --prefix=${PREFIX_PATH} ${CONFIG_CROSS} --enable-static --disable-shared --disable-largefile --disable-ipv6 \
       --disable-systemd --disable-libwrap --with-ssl=${PREFIX_PATH}  CFLAGS="-DHAVE_GETNAMEINFO -UHAVE_DAEMON " 
    check_result "ERROR: configure ${SRC_NAME} failure"

    sed -i -e "s|^LDFLAGS =.*|LDFLAGS =-static|g" src/Makefile
    sed -i -e "s|^#define HAVE_DAEMON.*|#undef HAVE_DAEMON|g" src/config.h
    make
    check_result "ERROR: compile ${SRC_NAME} failure"

    ${STRIP} src/stunnel
    cp src/stunnel ${PREFIX_PATH}/bin

    cd -
}


if [ ! -f ${PREFIX_PATH}/lib/libcrypto.so ] ; then
    cd ../openssl
    ./build.sh
    cd -
fi


export_cross

compile_stunnel