Gennaro Cimmino
52852ca38b
The RTL839x route rules match the destination in the template's DIP
fields, and the trap rules the switch MAC too, but never the frame
type. An IPv6 frame fills those fields too, so an
IPv6 frame to the switch whose destination ends in the 32 bits of an
offloaded IPv4 prefix takes that prefix's rule and is routed in
hardware, as IPv6, to the IPv4 route's gateway. IPv4-embedded IPv6
addresses under a /96 prefix (RFC 6052), such as the NAT64 prefix
64:ff9b::/96, end that way.
Match FRAME_TYPE IPv4 (2, USER_FIELD_FRAME_TYPE in the Realtek GPL
SDK), which the IACL entry keeps at bits 337:336 with its mask at
121:120, where the PIE writer already puts frame_type.
Measured on an HPE 1920-48G (RTL8393), 10.99.0.0/16 offloaded via
gateway G, forwarding off, 8 IPv6 echo requests to the switch for
2001:db8:5::a63:601 to ...:608, whose low 32 bits are 10.99.6.1 to .8:
- without this change: 8/8 routed to G (hop limit 63), the rule's
packet counter +8
- with this change: none at G, 8/8 at the CPU, counter +0
Destinations with 10.99.6.x in their high 32 bits were not routed on
either. IPv4 routing through the rules was unchanged (prefix order,
neighbour loss and back, a gateway shared by two routes). Both images
were main c282dd1f4d with bench debugfs files and the switch MAC change
for items 3 and 4 of #25768, not posted yet (a later revision of it on
the second, differing in how routes follow a MAC change).
Assisted-by: Claude:claude-opus-5-5
Signed-off-by: Gennaro Cimmino <gcimmino@rayonra.net>
Link: https://github.com/openwrt/openwrt/pull/25818
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
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!
Download
Built firmware images are available for many architectures and come with a package selection to be used as WiFi home router. To quickly find a factory image usable to migrate from a vendor stock firmware to OpenWrt, try the Firmware Selector.
If your device is supported, please follow the Info link to see install instructions or consult the support resources listed below.
An advanced user may require additional or specific package. (Toolchain, SDK, ...) For everything else than simple firmware download, try the wiki download page:
Development
To build your own firmware you need a GNU/Linux, BSD or macOS 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.
binutils bzip2 diff find flex gawk gcc-6+ getopt grep install libc-dev libz-dev
make4.1+ perl python3.8+ rsync subversion unzip which
Quickstart
-
Run
./scripts/feeds update -ato obtain all the latest package definitions defined in feeds.conf / feeds.conf.default -
Run
./scripts/feeds install -ato install symlinks for all obtained packages into package/feeds/ -
Run
make menuconfigto select your preferred configuration for the toolchain, target system & firmware packages. -
Run
maketo 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.
-
LuCI Web Interface: Modern and modular interface to control the device via a web browser.
-
OpenWrt Packages: Community repository of ported packages.
-
OpenWrt Routing: Packages specifically focused on (mesh) routing.
-
OpenWrt Video: Packages specifically focused on display servers and clients (Xorg and Wayland).
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
#openwrton oftc.net.
Developer Community
- Bug Reports: Report bugs in OpenWrt
- Dev Mailing List: Send patches
- Dev Chat: Channel
#openwrt-develon oftc.net.
License
OpenWrt is licensed under GPL-2.0