An opensource OpenWrt variant for mainland China users.
4c16daabbb
The ZyXEL NR7101 prepend an additional header to U-Boot images. This
header use the TRX magic 0x30524448 (HDR0), but is incompatible with
TRX images.
This code is reverse-engineered based on matching 32 bit numbers
found in the header with lengths and different checksum
calculations of the vendor images found on the device. The result
was matched against the validation output produced by the
bootloader to name the associated header fields.
Example bootloader validation output:
Zyxel TRX Image 1 --> Found! Header Checksum OK
============ZyXEL header information==================
chipId : MT7621A
boardId : NR7101
modelId : 07 01 00 01
kernel_len : (14177560)
kernelChksum : (0x8DD31F69)
swVersionInt : 1.00(ABUV.0)D1
swVersionExt : 1.00(ABUV.0)D1
Zyxel TRX Image 2 --> Found! Header Checksum OK
============ZyXEL header information==================
chipId : MT7621A
boardId : NR7101
modelId : 07 01 00 01
kernel_len : (14176660)
kernelChksum : (0x951A7637)
swVersionInt : 1.00(ABUV.0)D0
swVersionExt : 1.00(ABUV.0)D0
=================================================
Check image validation:
Image1 Header Magic Number --> OK
Image2 Header Magic Number --> OK
Image1 Header Checksum --> OK
Image2 Header Checksum --> OK
Image1 Data Checksum --> OK
Image2 Data Checksum --> OK
Image1 Stable Flag --> Stable
Image1 Try Counter --> 0
Image1: OK
Image2: OK
The coverage and algorithm for the kernelChksum field is unknown.
This field is not validated by the bootloader or the OEM firmware
upgrade tool. It is therefore set to a static value for now.
The swVersion fields contain free form string values. The OEM firmware
use ZyXEL structured version numbers as shown above. The strings are
not interpreted or validated on boot, so they can be repurposed for
anything we want the bootloader to display to the user. But the OEM
web GUI fails to flash images with freeform strings.
The purpose of the other strings in the header is not known. The
values appear to be static. We assume they are fixed for now, until
we have other examples. One of these strings is the platform name,
which is taken as an input parameter for support other members of
the device family.
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>
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| config | ||
| include | ||
| LICENSES | ||
| package | ||
| scripts | ||
| target | ||
| toolchain | ||
| tools | ||
| .gitattributes | ||
| .gitignore | ||
| BSDmakefile | ||
| Config.in | ||
| CONTRIBUTED.md | ||
| COPYING | ||
| feeds.conf.default | ||
| Makefile | ||
| README.md | ||
| rules.mk | ||
PROJECT IMMORTALWRT
The Core Source Code of ImmortalWrt
Welcome to our Telegram Group: @ctcgfw_openwrt_discuss.
How to make it
Minimum requirements
Linux with case sensitive
2G DDR2 RAM
2 CPU Cores (AMD64, 1.4Ghz)
25G disk space left
Has access to both ChinaNet & Internet
Install the necessary packages (for Ubuntu user)
sudo apt-get update -y
sudo apt-get full-upgrade -y
sudo apt-get install -y build-essential asciidoc binutils bzip2 gawk gettext git libncurses5-dev libz-dev patch unzip zlib1g-dev lib32gcc1 libc6-dev-i386 subversion flex uglifyjs git-core gcc-multilib g++-multilib p7zip p7zip-full msmtp libssl-dev texinfo libreadline-dev libglib2.0-dev xmlto qemu-utils upx libelf-dev autoconf automake libtool autopoint ccache curl wget vim nano python python3 python-pip python3-pip python-ply python3-ply haveged lrzsz device-tree-compiler scons antlr3 gperf intltool rsync
For mainland China & Ubuntu(16.04+) user, you may run the following command to setup quickly:
sudo bash -c "bash <(curl -s https://build-scripts.project-openwrt.eu.org/init_build_environment.sh)"
Clone the source
git clone -b openwrt-18.06-k5.4 --single-branch https://github.com/immortalwrt/immortalwrt && cd immortalwrt
./scripts/feeds update -a && ./scripts/feeds install -a
Configure your firmware
make menuconfig
Make it
make -j$(nproc) V=s
Tips
You'd better not use root to make it, or you may be not able to use.
Default login address: 192.168.1.1, username is root and password is password.