OpenWrt – Rev 1
?pathlinks?
RAMFS_COPY_BIN='osafeloader oseama'
PART_NAME=firmware
# $(1): file to read magic from
# $(2): offset in bytes
get_magic_long_at() {
dd if="$1" skip=$2 bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%02x"'
}
platform_flash_type() {
# On NAND devices "rootfs" is UBI volume, so won't be find in /proc/mtd
grep -q "\"rootfs\"" /proc/mtd && {
echo "serial"
return
}
echo "nand"
}
platform_expected_image() {
local machine=$(board_name)
case "$machine" in
"dlink,dir-885l") echo "seama wrgac42_dlink.2015_dir885l"; return;;
"netgear,r6250v1") echo "chk U12H245T00_NETGEAR"; return;;
"netgear,r6300v2") echo "chk U12H240T00_NETGEAR"; return;;
"netgear,r7000") echo "chk U12H270T00_NETGEAR"; return;;
"netgear,r7900") echo "chk U12H315T30_NETGEAR"; return;;
"netgear,r8000") echo "chk U12H315T00_NETGEAR"; return;;
"netgear,r8500") echo "chk U12H334T00_NETGEAR"; return;;
"tplink,archer-c9-v1") echo "safeloader"; return;;
esac
}
platform_identify() {
local magic
magic=$(get_magic_long "$1")
case "$magic" in
"48445230")
echo "trx"
return
;;
"2a23245e")
echo "chk"
return
;;
"5ea3a417")
echo "seama"
return
;;
esac
magic=$(get_magic_long_at "$1" 14)
[ "$magic" = "55324e44" ] && {
echo "cybertan"
return
}
if osafeloader info "$1" > /dev/null 2>&1; then
echo "safeloader"
return
fi
echo "unknown"
}
platform_check_image() {
[ "$#" -gt 1 ] && return 1
local file_type=$(platform_identify "$1")
local magic
local error=0
case "$file_type" in
"chk")
local header_len=$((0x$(get_magic_long_at "$1" 4)))
local board_id_len=$(($header_len - 40))
local board_id=$(dd if="$1" skip=40 bs=1 count=$board_id_len 2>/dev/null | hexdump -v -e '1/1 "%c"')
local dev_board_id=$(platform_expected_image)
echo "Found CHK image with device board_id $board_id"
[ -n "$dev_board_id" -a "chk $board_id" != "$dev_board_id" ] && {
echo "Firmware board_id doesn't match device board_id ($dev_board_id)"
error=1
}
if ! otrx check "$1" -o "$header_len"; then
echo "No valid TRX firmware in the CHK image"
error=1
fi
;;
"cybertan")
local pattern=$(dd if="$1" bs=1 count=4 2>/dev/null | hexdump -v -e '1/1 "%c"')
local dev_pattern=$(platform_expected_image)
echo "Found CyberTAN image with device pattern: $pattern"
[ -n "$dev_pattern" -a "cybertan $pattern" != "$dev_pattern" ] && {
echo "Firmware pattern doesn't match device pattern ($dev_pattern)"
error=1
}
if ! otrx check "$1" -o 32; then
echo "No valid TRX firmware in the CyberTAN image"
error=1
fi
;;
"safeloader")
;;
"seama")
local img_signature=$(oseama info "$1" | grep "Meta entry:.*signature=" | sed "s/.*=//")
local dev_signature=$(platform_expected_image)
echo "Found Seama image with device signature: $img_signature"
[ -n "$dev_signature" -a "seama $img_signature" != "$dev_signature" ] && {
echo "Firmware signature doesn't match device signature ($dev_signature)"
error=1
}
$(oseama info "$1" -e 0 | grep -q "Meta entry:.*type=firmware") || {
echo "Seama container doesn't have firmware entity"
error=1
}
;;
"trx")
local expected=$(platform_expected_image)
[ "$expected" == "safeloader" ] && {
echo "This device expects SafeLoader format and may not work with TRX"
error=1
}
if ! otrx check "$1"; then
echo "Invalid (corrupted?) TRX firmware"
error=1
fi
;;
*)
echo "Invalid image type. Please use only .trx files"
error=1
;;
esac
return $error
}
# $(1): image for upgrade (with possible extra header)
# $(2): offset of trx in image
platform_pre_upgrade_trx() {
local dir="/tmp/sysupgrade-bcm53xx"
local trx="$1"
local offset="$2"
# Extract partitions from trx
rm -fR $dir
mkdir -p $dir
otrx extract "$trx" \
${offset:+-o $offset} \
-1 $dir/kernel \
-2 $dir/root
[ $? -ne 0 ] && {
echo "Failed to extract TRX partitions."
return
}
# Firmwares without UBI image should be flashed "normally"
local root_type=$(identify $dir/root)
[ "$root_type" != "ubi" ] && {
echo "Provided firmware doesn't use UBI for rootfs."
return
}
# Prepare TRX file with just a kernel that will replace current one
local linux_length=$(grep "\"linux\"" /proc/mtd | sed "s/mtd[0-9]*:[ \t]*\([^ \t]*\).*/\1/")
[ -z "$linux_length" ] && {
echo "Unable to find \"linux\" partition size"
exit 1
}
linux_length=$((0x$linux_length))
local kernel_length=$(wc -c $dir/kernel | cut -d ' ' -f 1)
[ $kernel_length -gt $linux_length ] && {
echo "New kernel doesn't fit \"linux\" partition."
return
}
rm -f /tmp/null.bin
rm -f /tmp/kernel.trx
touch /tmp/null.bin
otrx create /tmp/kernel.trx \
-f $dir/kernel -b $(($linux_length + 28)) \
-f /tmp/null.bin
[ $? -ne 0 ] && {
echo "Failed to create simple TRX with new kernel."
return
}
# Prepare UBI image (drop unwanted extra blocks)
local ubi_length=0
while [ "$(dd if=$dir/root skip=$ubi_length bs=1 count=4 2>/dev/null)" = "UBI#" ]; do
ubi_length=$(($ubi_length + 131072))
done
dd if=$dir/root of=/tmp/root.ubi bs=131072 count=$((ubi_length / 131072)) 2>/dev/null
[ $? -ne 0 ] && {
echo "Failed to prepare new UBI image."
return
}
# Flash
mtd write /tmp/kernel.trx firmware || exit 1
nand_do_upgrade /tmp/root.ubi
}
platform_pre_upgrade_seama() {
local dir="/tmp/sysupgrade-bcm53xx"
local seama="$1"
local tmp
# Extract Seama entity from Seama seal
rm -fR $dir
mkdir -p $dir
oseama extract "$seama" \
-e 0 \
-o $dir/seama.entity
[ $? -ne 0 ] && {
echo "Failed to extract Seama entity."
return
}
local entity_size=$(wc -c $dir/seama.entity | cut -d ' ' -f 1)
local ubi_offset=0
tmp=0
while [ 1 ]; do
[ $tmp -ge $entity_size ] && break
[ "$(dd if=$dir/seama.entity skip=$tmp bs=1 count=4 2>/dev/null)" = "UBI#" ] && {
ubi_offset=$tmp
break
}
tmp=$(($tmp + 131072))
done
[ $ubi_offset -eq 0 ] && {
echo "Failed to find UBI in Seama entity."
return
}
local ubi_length=0
while [ "$(dd if=$dir/seama.entity skip=$(($ubi_offset + $ubi_length)) bs=1 count=4 2>/dev/null)" = "UBI#" ]; do
ubi_length=$(($ubi_length + 131072))
done
dd if=$dir/seama.entity of=$dir/kernel.seama bs=131072 count=$(($ubi_offset / 131072)) 2>/dev/null
dd if=$dir/seama.entity of=$dir/root.ubi bs=131072 skip=$(($ubi_offset / 131072)) count=$(($ubi_length / 131072)) 2>/dev/null
# Flash
local kernel_size=$(sed -n 's/mtd[0-9]*: \([0-9a-f]*\).*"\(kernel\|linux\)".*/\1/p' /proc/mtd)
mtd write $dir/kernel.seama firmware || exit 1
mtd ${kernel_size:+-c 0x$kernel_size} fixseama firmware
nand_do_upgrade $dir/root.ubi
}
platform_pre_upgrade() {
local file_type=$(platform_identify "$1")
[ "$(platform_flash_type)" != "nand" ] && return
# Find trx offset
case "$file_type" in
"chk") platform_pre_upgrade_trx "$1" $((0x$(get_magic_long_at "$1" 4)));;
"cybertan") platform_pre_upgrade_trx "$1" 32;;
"seama") platform_pre_upgrade_seama "$1";;
"trx") platform_pre_upgrade_trx "$1";;
esac
}
platform_trx_from_chk_cmd() {
local header_len=$((0x$(get_magic_long_at "$1" 4)))
echo -n dd skip=$header_len iflag=skip_bytes
}
platform_trx_from_cybertan_cmd() {
echo -n dd skip=32 iflag=skip_bytes
}
platform_img_from_safeloader() {
local dir="/tmp/sysupgrade-bcm53xx"
# Extract partitions from SafeLoader
rm -fR $dir
mkdir -p $dir
osafeloader extract "$1" \
-p "os-image" \
-o $dir/os-image
osafeloader extract "$1" \
-p "file-system" \
-o $dir/file-system
mtd write $dir/file-system rootfs
echo -n $dir/os-image
}
platform_img_from_seama() {
local dir="/tmp/sysupgrade-bcm53xx"
local offset=$(oseama info "$1" -e 0 | grep "Entity offset:" | sed "s/.*:\s*//")
local size=$(oseama info "$1" -e 0 | grep "Entity size:" | sed "s/.*:\s*//")
# Busybox doesn't support required iflag-s
# echo -n dd iflag=skip_bytes,count_bytes skip=$offset count=$size
rm -fR $dir
mkdir -p $dir
dd if="$1" of=$dir/image-noheader.bin bs=$offset skip=1
dd if=$dir/image-noheader.bin of=$dir/image-entity.bin bs=$size count=1
echo -n $dir/image-entity.bin
}
platform_do_upgrade() {
local file_type=$(platform_identify "$1")
local trx="$1"
local cmd=
[ "$(platform_flash_type)" == "nand" ] && {
echo "Writing whole image to NAND flash. All erase counters will be lost."
}
case "$file_type" in
"chk") cmd=$(platform_trx_from_chk_cmd "$trx");;
"cybertan") cmd=$(platform_trx_from_cybertan_cmd "$trx");;
"safeloader") trx=$(platform_img_from_safeloader "$trx"); PART_NAME=os-image;;
"seama") trx=$(platform_img_from_seama "$trx");;
esac
default_do_upgrade "$trx" "$cmd"
}