These scripts allow you to modify the Xiaomi AX3600 (R3600) and Xiaomi AX1800 (RM1800) firmware image to make sure SSH and UART access is always enabled.
The default root password is
password. Please remember to login to the router and change that after the upgrade. Your router settings like IP address and SSIDs are stored in the nvram and should stay the same.
Between preserving stock functionality and privacy concerns, I would err on the side of caution and rather that some functionality be sacrificed for a router that I have more confidence to connect to the Internet.
Note that in order to get SSH access to the router initially, you need to downgrade the AX3600 to version 1.0.17 and exploit it first / downgrade the AX1800 to version 1.0.378 (or below) and exploit it first. Once you have SSH, you can use this repacking method to maintain SSH access for newer versions.
You will need to install the following tools:
- unsquashfs / mksquashfs
Download the firmware from miwifi.com. It should be something like
ubireader_extract_imagesutility from ubi_reader to unpack the UBI image from the firmware. Technically there's junk at the front, but the script will ignore it:
ubireader_extract_images -w miwifi_r3600_firmware_xxx_yyy.bin
The unpacked files will be in the
Patch the rootfs using the
fakeroot -- ./repack-squashfs.sh ubifs-root/miwifi_r3600_firmware.../img-264..._vol-ubi_rootfs.ubifs
The script will create a new squashfs image with the
.newsuffix. You will need
fakerootin order to create files and devices as
root. You could also run this script as
root, but please don't.
Recombine the kernel and patched rootfs with
./ubinize.sh ubifs-root/miwifi_r3600_firmware.../...kernel.ubifs \ ubifs-root/miwifi_r3600_firmware.../...ubi_rootfs.ubifs.new
./ubinize.sh ubifs-root/miwifi_rm1800_firmware.../...kernel.ubifs \ ubifs-root/miwifi_rm1800_firmware.../...ubi_rootfs.ubifs.new \ --data
Note the use of the
.ubifs.newfile. The combined output file will be
r3600-raw-img.bin, even if you are using a rm1800 image!
Flash this file directly into the router using SSH. You cannot use the web UI because this is a raw image, and more importantly has no signature.
If you are using a recently xqrepack'ed firmware, you can use the
xqflashutility on the router to flash an update image:
After it completes successfully, you should be able to
xqflashutility is not available, you can manually flash the update image described in the following section.
The R3600 firmware uses an A/B partition system, called
rootfs_1. This corresponds to
mtd13. Find the partition that is not the one in use and use
ubiformat to write the raw image onto the partition:
ubiformat /dev/mtd12 -f /tmp/r3600-raw-img.bin -s 2048 -O 2048
Set the nvram variable to re-initialize
/etc (and I think to switch partitions also):
nvram set flag_ota_reboot=1 nvram commit reboot
You can check the MTD partitions from
root@XiaoQiang:~# grep rootfs /proc/mtd mtd12: 023c0000 00020000 "rootfs" mtd13: 023c0000 00020000 "rootfs_1" mtd17: 015cc000 0001f000 "ubi_rootfs" root@XiaoQiang:~# nvram get flag_boot_rootfs 1
flag_boot_rootfs nvram variable indicates which partition is booted,
You should pick the partition that is not in use, otherwise
ubiformat will complain:
ubiformat: error!: please, first detach mtd13 (/dev/mtd13) from ubi0
xqrepack is licensed under the 3-clause ("modified") BSD License.
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