#!/bin/sh
set -e

#########################################################################

VERSION=""

BROADCOM_WL=""

WL_APSTA="wl_apsta-3.130.20.0.o"

DOWNLOAD="${WL_APSTA}"

URL="https://downloads.openwrt.org/sources/${WL_APSTA}"

SHA512SUM="d89ed52045307449bbae79a4d1807cc6cd89ae67c4a22e8e8aa51c1396edbb6ed8b157cd0756faf8b660a537b48b62117c57967f2048245b5b102d9d9bca4bbd"

FIRMWARE_INSTALL_DIR="/lib/firmware"

B43="b43legacy"

#########################################################################
# stable sections below, not updated for firmware updates		#
#########################################################################

. /usr/share/debconf/confmodule

latest_firmware ()
{
tmp=$(mktemp -q -d)

cd $tmp

# use apt proxy
APT_PROXIES=$(apt-config shell \
http_proxy Acquire::http::Proxy \
https_proxy Acquire::https::Proxy \
ftp_proxy Acquire::ftp::Proxy \
)

if [ -n "$APT_PROXIES" ]; then
        eval export $APT_PROXIES
fi

if ! wget --timeout=60 "${URL}"; then
	echo "$0: Some problem occurred during the firmware download. Please check your internet connection." 1>&2
	exit 1
fi
if ! sha512sum -c /dev/stdin << EOF; then
${SHA512SUM}  ${DOWNLOAD}
EOF
	echo "$0: Downloaded firmware did not match known SHA512 checksum, aborting." 1>&2
	exit 1
fi
if [ "${DOWNLOAD}" != "${WL_APSTA}" ]; then
	if ! tar xvjf "${DOWNLOAD}" "${WL_APSTA}"; then
		echo "$0: Unpacking firmware file failed, unable to continue (is /tmp full?)." 1>&2
		exit 1
	fi
fi
catalog="${FIRMWARE_INSTALL_DIR}/${B43}/firmware-${B43}-installer.catalog"
if [ -f "${catalog}" ]; then
	echo "$0: Deleting old extracted firmware..." 1>&2
	xargs -r -0 -a "${catalog}" dpkg-query -S 2>&1 1>/dev/null | sed -es',[^/]\+,,' | xargs -r rm --
	rm "${catalog}"
fi
mkdir -p "${FIRMWARE_INSTALL_DIR}/${B43}"
retcode=0
b43-fwcutter -w "${FIRMWARE_INSTALL_DIR}" "${WL_APSTA}" | while read line
do	echo "${line}"
	file="${line#Extracting }"
	if [ "${file}" != "${line}" ]
	then	if [ "${retcode}" -ne 0 ]
		then	rm "${FIRMWARE_INSTALL_DIR}/${file}"

		elif [ -z "${FIRMWARE_INSTALL_DIR}/${file}" ] || \
		! printf %s/%s\\000 "${FIRMWARE_INSTALL_DIR}" "${file}" >> "${catalog}"
		then	echo "$0: Failed during extraction of ${file} from ${WL_APSTA}" 1>&2
			echo "$0: Warning, manual removal/cleaning of ${FIRMWARE_INSTALL_DIR}/${B43} may be needed!" 1>&2
			rm "${FIRMWARE_INSTALL_DIR}/${file}"
			retcode=1
		fi
	fi
done

rm -f "${DOWNLOAD}" "${WL_APSTA}"
rm -rf "${BROADCOM_WL}"

# otherwise can't delete things
cd /

rmdir $tmp || echo "$0: DEBUG: targeted cleaning failed" 1>&2

rm -rf $tmp
[ ${retcode} -eq 0 ] || exit ${retcode}
}

# check environment
if [ "$(stat -c %d/%i /)" != "$(stat -Lc %d/%i /proc/1/root 2>/dev/null)" ];
 then
    echo "A chroot environment has been detected."
    echo "Remember this firmware needs kernel >= 2.6.25."
    latest_firmware
    exit 0
 else
    echo "No chroot environment found. Starting normal installation"
fi

# install firmware unconditional if the corresponding debconf value is true
# this is usefull for live-systems or similar systems that should work on
# changing hardware
db_get b43-fwcutter/install-unconditional
if [ "$RET" = "true" ] ; then
    latest_firmware
    exit 0
fi

# Fix for BCM4306 [14e4:4320] (rev 02)
chip=`lspci -n | grep -o "14e4:4320 (rev 02)"` || true
if [ "$chip" ] ; then
   echo "Your card is BCM4306 [14e4:4320] (rev 02), using b43legacy firmware"
   latest_firmware
   exit 0
fi

# check chip
supported=0
pci=`lspci -n | grep -o "14e4:[1234567890abcdef]\+"` || true

if [ -n "$pci" ]; then
        for device in $pci; do
                device_id=`echo $device | cut -d: -f2`
                case $device_id in
                4301 | 4306 | 4320 | 4324 |  4325)
                        supported=1
                        break
                ;;
		esac
        done
fi

if [ "$supported" = 0 ]; then
        echo "No supported card found."
        echo "Use b43 firmware. This is just for the b43legacy driver."
        echo "Aborting."
        exit 0
fi

latest_firmware