ExternalVendorCode/openwrt
1
0
Fork 0
mirror of https://github.com/openwrt/openwrt.git synced 2024-12-21 14:37:57 +00:00
Code Issues Actions 7 Packages Projects Releases Wiki Activity
This repository is a mirror of https://git.openwrt.org/openwrt/openwrt.git It is for reference only and is not active for check-ins. We will continue to accept Pull Requests here. They will be merged via staging trees then into openwrt.git.
50,601 Commits 9 Branches 75 Tags 908 MiB
C 61.2%
Makefile 19.2%
Shell 6.9%
Roff 6.7%
Perl 2.5%
Other 3.4%
dd6f02a3f4
Go to file
Bjørn Mork dd6f02a3f4 firmware-utils: zytrx: Add util for ZyXEL specific header 
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>
Tested-by: Bjørn Mork <bjorn@mork.no>
(cherry picked from commit 48cad07a55)
2021-06-10 17:09:35 +02:00
.github build: Update README & github help 2018-07-08 09:41:53 +01:00
config build: use SPDX license tags 2021-02-05 14:54:47 +01:00
include kernel: bump 5.4 to 5.4.124 2021-06-06 17:54:51 +02:00
LICENSES LICENSES: include all used licenses in LICENSES directory 2021-02-14 19:21:38 +01:00
package treewide: make AddDepends/usb-serial selective 2021-06-08 22:50:32 +02:00
scripts build,json: backport default_packages fixes 2021-03-25 23:15:42 -10:00
target treewide: make AddDepends/usb-serial selective 2021-06-08 22:50:32 +02:00
toolchain glibc: update to latest 2.33 HEAD (BZ #27892) 2021-06-08 20:44:08 +02:00
tools firmware-utils: zytrx: Add util for ZyXEL specific header 2021-06-10 17:09:35 +02:00
.gitattributes add .gitattributes to prevent the git autocrlf option from messing with CRLF/LF in files 2012-05-08 13:30:49 +00:00
.gitignore gitignore: add .vscode for VS Code users 2021-03-29 22:26:27 +02:00
BSDmakefile build: use SPDX license tags 2021-02-05 14:54:47 +01:00
Config.in build: use SPDX license tags 2021-02-05 14:54:47 +01:00
COPYING COPYING: add COPYING file to specify project licenses 2021-02-14 19:21:38 +01:00
feeds.conf.default OpenWrt v21.02.0-rc2: revert to branch defaults 2021-05-29 20:02:03 +02:00
Makefile Revert "build: replace which with Bash command built-in" 2021-03-03 23:02:30 +01:00
README.md build: add which command to build requirements 2021-03-03 23:03:25 +01:00
rules.mk build: make sure asm gets built with -DPIC 2021-04-10 15:05:18 +02:00

README.md

OpenWrt logo

OpenWrt Project is a Linux operating system targeting embedded devices. Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the vendor and allows you to customize the device through the use of packages to suit any application. For developers, OpenWrt is the framework to build an application without having to build a complete firmware around it; for users this means the ability for full customization, to use the device in ways never envisioned.

Sunshine!

Development

To build your own firmware you need a GNU/Linux, BSD or MacOSX system (case sensitive filesystem required). Cygwin is unsupported because of the lack of a case sensitive file system.

Requirements

You need the following tools to compile OpenWrt, the package names vary between distributions. A complete list with distribution specific packages is found in the Build System Setup documentation.

gcc binutils bzip2 flex python3 perl make find grep diff unzip gawk getopt
subversion libz-dev libc-dev rsync which

Quickstart

  1. Run ./scripts/feeds update -a to obtain all the latest package definitions defined in feeds.conf / feeds.conf.default

  2. Run ./scripts/feeds install -a to install symlinks for all obtained packages into package/feeds/

  3. Run make menuconfig to select your preferred configuration for the toolchain, target system & firmware packages.

  4. Run make to build your firmware. This will download all sources, build the cross-compile toolchain and then cross-compile the GNU/Linux kernel & all chosen applications for your target system.

Related Repositories

The main repository uses multiple sub-repositories to manage packages of different categories. All packages are installed via the OpenWrt package manager called opkg. If you're looking to develop the web interface or port packages to OpenWrt, please find the fitting repository below.

Support Information

For a list of supported devices see the OpenWrt Hardware Database

Documentation

Support Community

  • Forum: For usage, projects, discussions and hardware advise.
  • Support Chat: Channel #openwrt on freenode.net.

Developer Community

License

OpenWrt is licensed under GPL-2.0