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Diffstat (limited to 'scripts/make-ras.sh')
| -rwxr-xr-x | scripts/make-ras.sh | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/scripts/make-ras.sh b/scripts/make-ras.sh deleted file mode 100755 index ccddaa0016..0000000000 --- a/scripts/make-ras.sh +++ /dev/null @@ -1,196 +0,0 @@ -#!/usr/bin/env bash -# -# --- ZyXEL header format --- -# Original Version by Benjamin Berg <benjamin@sipsolutions.net> -# -# The firmware image prefixed with a header (which is written into the MTD device). -# The header is one erase block (~64KiB) in size, but the checksum only convers the -# first 2KiB. Padding is 0xff. All integers are in big-endian. -# -# The checksum is always a 16-Bit System V checksum (sum -s) stored in a 32-Bit integer. -# -# 4 bytes: checksum of the rootfs image -# 4 bytes: length of the contained rootfs image file (big endian) -# 32 bytes: Firmware Version string (NUL terminated, 0xff padded) -# 4 bytes: checksum over the header partition (big endian - see below) -# 32 bytes: Model (e.g. "NBG6617", NUL termiated, 0xff padded) -# 4 bytes: checksum of the kernel partition -# 4 bytes: length of the contained kernel image file (big endian) -# rest: 0xff padding -# -# The checksums are calculated by adding up all bytes and if a 16bit -# overflow occurs, one is added and the sum is masked to 16 bit: -# csum = csum + databyte; if (csum > 0xffff) { csum += 1; csum &= 0xffff }; -# Should the file have an odd number of bytes then the byte len-0x800 is -# used additionally. -# -# The checksum for the header is calculated over the first 2048 bytes with -# the rootfs image checksum as the placeholder during calculation. -# -# The header is padded with 0xff to the erase block size of the device. -# -board="" -version="" -kernel="" -rootfs="" -outfile="" -err="" - -while [ "$1" ]; do - case "$1" in - "--board") - board="$2" - shift - shift - continue - ;; - "--version") - version="$2" - shift - shift - continue - ;; - "--kernel") - kernel="$2" - shift - shift - continue - ;; - "--rootfs") - rootfs="$2" - shift - shift - continue - ;; - "--rootfssize") - rootfssize="$2" - shift - shift - continue - ;; - *) - if [ ! "$outfile" ]; then - outfile=$1 - shift - continue - fi - ;; - esac -done - -if [ ! -n "$board" -o ! -n "$version" -o ! -r "$kernel" -o ! -r "$rootfs" -o ! "$rootfssize" -o ! "$outfile" ]; then - echo "syntax: $0 [--board ras-boardname] [--version ras-version] [--kernel kernelimage] [--rootfs rootfs] out" - exit 1 -fi - -rootfs_len=$(wc -c < "$rootfs") - -if [ "$rootfs_len" -lt "$rootfssize" ]; then - dd if=$rootfs of=$rootfs.new bs=$rootfssize conv=sync - mv $rootfs.new $rootfs -fi - -if [ ${#version} -ge 28 ]; then - echo "version: '$version' is too long" - exit 1 -fi - -tmpdir="$( mktemp -d 2> /dev/null )" -if [ -z "$tmpdir" ]; then - # try OSX signature - tmpdir="$( mktemp -t 'ubitmp' -d )" -fi - -if [ -z "$tmpdir" ]; then - exit 1 -fi - -to_be() { - local val="$1" - local size="$2" - - case "$size" in - 4) - echo $(( "$val" >> 24 | ("$val" & 0xff0000) >> 8 | ("$val" & 0xff00) << 8 | ("$val" & 0xff) << 24 )) - ;; - 2) - echo $(( "$val" >> 8 | ("$val" & 0xff) << 8)) - ;; - esac -} - -checksum_file() { - local file=$1 - - # ZyXEL seems to use System V sum mode... Now this is classy, who would have thought?! - echo $(sum -s ${file} | cut -f1 -d" ") -} - -append_bin() { - local val=$1 - local size=$2 - local file=$3 - - while [ "$size" -ne 0 ]; do - printf \\$(printf %o $(("$val" & 0xff))) >> "$file" - val=$(($val >> 8)) - let size-=1 - done - return -} - -tf=${tmpdir}/out -pad=$(printf '%0.1s' $(printf "\xff"){1..64}) - -rootfs_header_file="$tmpdir/rootfs_header" -rootfs_chksum=$(to_be $(checksum_file ${rootfs}) 4) -rootfs_len=$(to_be $(wc -c < "$rootfs") 4) - -versionpadlen=$(( 32 - ( ${#version} + 1) )) - -# 4 bytes: checksum of the rootfs image -append_bin "$rootfs_chksum" 4 "$rootfs_header_file" -# 4 bytes: length of the contained rootfs image file (big endian) -append_bin "$rootfs_len" 4 "$rootfs_header_file" -# 32 bytes: Firmware Version string (NUL terminated, 0xff padded) -printf "%s\x00%.*s" "$version" "$versionpadlen" "$pad" >> "$rootfs_header_file" - -kernel_header_file="$tmpdir/kernel_header" -kernel_chksum=$(to_be $(checksum_file ${kernel}) 4) -kernel_len=$(to_be $(wc -c < "$kernel") 4) - -# 4 bytes: checksum of the kernel image -append_bin "$kernel_chksum" 4 "$kernel_header_file" -# 4 bytes: length of the contained kernel image file (big endian) -append_bin "$kernel_len" 4 "$kernel_header_file" - -board_header_file="$tmpdir/board_header" -board_file="$tmpdir/board" -boardpadlen=$(( 64 - ( ${#board} + 1) )) -# 32 bytes: Model (e.g. "NBG6617", NUL termiated, 0xff padded) -printf "%s\x00%.*s" "$board" "$boardpadlen" "$pad" > "$board_file" -cat "$kernel_header_file" >> "$board_file" -printf "%.12s" "$pad" >> "$board_file" -# rest: 0xff padding -for i in {1..511}; do - printf "%s%s" "$pad" "$pad" >> "$board_file" -done - -tmp_board_file="$tmpdir/tmp_board_file" -cat "$rootfs_header_file" > "$tmp_board_file" - -# The checksum for the header is calculated over the first 2048 bytes with -# the rootfs image checksum as the placeholder during calculation. -append_bin "$rootfs_chksum" 4 "$tmp_board_file" -cat "$board_file" >> "$tmp_board_file" - -truncate -s 2048 $tmp_board_file -board_chksum=$(to_be $(checksum_file ${tmp_board_file}) 4) - -# 4 bytes: checksum over the header partition (big endian) -append_bin "$board_chksum" 4 "$board_header_file" -cat "$board_file" >> "$board_header_file" - -cat "$rootfs_header_file" "$board_header_file" "$rootfs" "$kernel" > "$outfile" - -rm -rf "$tmpdir" |