UF-Instant firmware patching script

build.sh

#!/bin/bash -xe
OLT_FW=https://dl.ui.com/firmwares/ufiber/UF-OLT.v4.3.1.3909.210421.0814.tar
GPON_SN=ZTEG01020304
GPON_SN_RAW=5a54454701020304
GPON_MAC=01:02:03:04:05:06

[ $UID != 0 ] && echo "You need to be root" && exit 1

wget -O UF-OLT.tar $OLT_FW
mkdir oltfw
(
    cd oltfw
    tar -xf ../UF-OLT.tar
    unsquashfs squashfs.tmp
    mv squashfs-root/usr/share/onufw/UF-ONU.UF-INSTANT.* ../
)
rm -rf oltfw UF-OLT.tar

FW_NAME_GLOB=(UF-ONU.UF-INSTANT.*)
FW_NAME="${FW_NAME_GLOB[0]%.img}"

rm -rf $FW_NAME $FW_NAME.mod* $FW_NAME.tar

tail -c +57 $FW_NAME.img >$FW_NAME.tar
mkdir $FW_NAME
(
    cd $FW_NAME
    tar -xf ../$FW_NAME.tar
    unsquashfs rootfs
    sed -i "s/%c%c%c%c%02x%02x%02x%02x/$GPON_SN\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00/" squashfs-root/lib/modules/ubnthal.ko
    sed -i "s/%02x%02x%02x%02x%02x%02x%02x%02x/$GPON_SN_RAW\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00/" squashfs-root/lib/modules/ubnthal.ko
    perl -pi -e "s/%02x:%02x:%02x:%02x:%02x:%02x\n/$GPON_MAC\n\0\0\0\0\0\0\0\0\0\0\0\0/" squashfs-root/lib/modules/ubnthal.ko
    mksquashfs squashfs-root rootfs.mod -comp lzma -always-use-fragments -b 131072
    mv rootfs.mod rootfs
    chmod 700 rootfs
    md5sum $(cut -d' ' -f3 <md5.txt | xargs) >md5.mod.txt
    mv md5.mod.txt md5.txt

    tar -cf ../$FW_NAME.mod.tar --owner=builder:1000 --group=builder:1000 $(tar -tf ../$FW_NAME.tar | xargs)
)

{
    printf 'UBNT.ONU'
    for _ in $(seq 1 27); do printf '\x00'; done
    printf '\x01\x00\x00\x00\x00'
    printf '%08x\n' $(($(stat -c %s "$FW_NAME.mod.tar") + 56)) | xxd -r -p
    printf '\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\xee\xc6'
    cat $FW_NAME.mod.tar
} >$FW_NAME.mod.img

CKSUM=$(crc32 $FW_NAME.mod.img)
echo "$CKSUM" | xxd -r -p | dd bs=1 seek=44 of=$FW_NAME.mod.img conv=notrunc

rm -rf $FW_NAME $FW_NAME.img $FW_NAME.mod.tar $FW_NAME.tar

@obenturk did it worked for you? Here the dream machine didn’t recognized the new values using another solution. But I didn’t patched the MAC

I don't want to test ISP yet because last time when I plug fiber cable it generated alarm on the OLT side and even ISP ONU blocked by the OLT.

But EdgeRouter4 recognized the UFinstant with new values. Also flash get and set working properly even after reboot.

@obenturk did it worked for you? Here the dream machine didn’t recognized the new values using another solution. But I didn’t patched the MAC

Could someone please help me to update following entry in ubnthal.ko?

[cat /proc/ubnthal/model]
UF-Instant

sed -i "s/UF-Instant/$GPON_MODEL/" squashfs-root/lib/modules/ubnthal.ko

Did not worked. It made ubnthal directory never created.