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Openwrt firmware with SFE and FlowOffload
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gwlim
Latest commit ef20ff8 Oct 6, 2019

README.md

Fast Path Builds for OpenWRT

❗️PLEASE NOTE AR71XX DEVICES HAS BEEN DEPRECATED, PLEASE PORT THE DEVICES TO ATH79 BY MIGRATING THEM TO DTS CODE AT OPENWRT.ORG

Changelog

Updated to kernel 4.19 for ath79
Fix up all unaligned memory accesses on ath79
Optimize SFE for IPv4 and IPv6
Fix up LuCI code for SFE
Fix up IPv6 SFE Offloading
Fixed up forgotten size optimization for kernel 4.19
Add support for modded flash expansion for ath79
Shrink size for small builds by removing USB due to not enough free memory
Fix up port forwarding in SFE

After flashing only basic services are enabled, to use additional features (SFE) you have to START them

I can only test the builds on units I own, so for units I do not own please feedback if something works or not

Non-essential Kernel Modules have been moved to a tarball. Download and install them separately.

Reboot recommended to ensure all routing passes through fast path

List of Routers (Supported added base on suitability & request)

Model Actual Processor Architecture Code Branch Wireless Variant
Netgear WNDR3800CH mips24k ath79 ath9k Normal
TP-Link WR1043NDv1 (Have unit for testing) mips24k ath79 ath9k Both
TP-Link WR2543ND mips24k ath79 ath9k Normal
Netgear WNDR3700v1 mips24k ath79 ath9k Normal
TP-Link WDR3500v1 mips74k ath79 ath9k Normal
TP-Link WDR3600v1 mips74k ath79 ath9k Normal
TP-Link WDR4300v1 (Have unit for testing) mips74k ath79 ath9k Normal
TP-Link WR1043NDv2 mips74k ath79 ath9k Normal
TP-Link WR1043NDv3 mips74k ath79 ath9k Normal
TP-Link WR1043NDv4 mips74k ath79 ath9k Normal
TP-Link WR1043Nv5 mips74k ath79 ath9k Normal
Western Digital My Net N750 mips74k ath79 ath9k Normal
TP-Link RE450v1 mips74k ath79 ath9k,ath10k-qca988x Small
TP-Link Archer C5v1 mips74k ath79 ath9k,ath10k-qca988x Normal
TP-Link Archer C7v2 mips74k ath79 ath9k,ath10k-qca988x Normal
TP-Link Archer C7v4 mips74k ath79 ath9k,ath10k-qca988x Normal
TP-Link Archer C7v5 mips74k ath79 ath9k,ath10k-qca988x Normal
TP-Link Archer A7v5 mips74k ath79 ath9k,ath10k-qca988x Normal
Ubiquiti UniFi AC Lite mips74k ath79 ath9k,ath10k-qca988x Normal
Ubiquiti UniFi AC Pro mips74k ath79 ath9k,ath10k-qca988x Normal
Phicomm K2T mips74k ath79 ath9k,ath10k-qca9888 Normal
TP-Link Archer C6v2 mips74k ath79 ath9k,ath10k-qca9888 Normal
TP-Link WDR4900v1 (Have unit for testing) mpc8548 mpc85xx ath9k Normal

Summary

This repository contains Openwrt firmware images compiled with shortcut-fe module, additional features, performance as well as security optimizations.

The firmware images are based on the Trunk Branch of Openwrt.

During to kernel configuration modifications, upstream kmods cannot be used but upstream packages can be installed

All the kmods are available in the tarball

If your router is among the supported (must be ar71xx, ath79 or mpc85xx based) and you want to use this firmware open an issue.

This firmware is optimize for networking performance aspect, I don't recommend running NAS on embedded devices.

For better performance NAS workloads should be running on dedicated devices.

Which to use ?

The images are subdivided into their respective SOC architectures.

There are differences between mips24k, mips74k, powerpc(mpc85xx) and different optimizations are required to maximise the performance respectively.

Linux Kernel size increase, as well as larger rootfs/security changes in Openwrt, 4MB Router devices are increasingly hard to support.

There are 2 factors affecting this:

-if the flash is too small, the firmware cannot be compiled to fit

-if the RAM is too small, after loading there is insufficient memory to load the firmware in memory and operate properly

Therefore if your router has 32MB RAM OR 4MB Flash please go for the mini builds, otherwise you can go for the normal builds.

Features

Base on Linux Kernel 4.19 using GCC 7.4 toolchain (Both Builds)

Full IPv6 support (Both Builds)

PPPoE and L2TP Kmods included, xl2tpd can be installed from opkg (Both Builds)

Memory Operations optimization for mips24k,mips74k and mpc85xx Architectures (Both Builds)

Shortcut-fe Fast Path Module for accelerated NAT/Routing performance (Both Builds)

FlowOffload Fast Path Module for accelerated NAT/Routing performance (Install from Tarball Archives)

Default to BBR Congestion Control Algorithm (Both Builds)

root@openwrt:~# cat /proc/sys/net/ipv4/tcp_congestion_control
bbr

Stack-Smashing Protection (REGULAR)

SQM QoS (Normal Builds included, Mini Builds install from opkg)

Kernel Compiled with -O2 Compiler optimization (Normal Builds Only)

OpenSSL Crypto assembly optimizations for mips24k,mips74k and mpc85xx Architectures (Normal Builds Only)

Nlbwmon - Network Bandwidth Monitoring (Normal Builds Only)

4G LTE USB Support (Normal Builds Only, Drivers in Tarball Archive)

OpenVPN encrypted tunneling (Normal Builds Only)

Wireguard encrypted stateless tunneling (Normal Builds Only)

How to install from OEM firmware

  1. Download the "factory" firmware and upload it via the firmware upgrade page (Done for the first time only)

  2. For Subsequent upgrades to newer Openwrt firmware, download the "sysupgrade" and upload it via the openwrt firmware upgrade page

  3. Use http://192.168.1.1 to access the OpenWrt Router Configuration Page

  4. Configure your Router settings and enable the features required

Use

Default Network Address after login: http://192.168.1.1

Subnet Mask: 255.255.255.0

Login: root

DYNACK is enabled on hostapd so for NETWORK -> WIRELESS -> ADVANCE SETTINGS -> DISTANCE OPTIMIZATION -> ENTER "auto" for best performance.

alt text

To enable FlowOffload go to NETWORK -> FIREWALL

To enable SFE go to NETWORK -> FIREWALL

alt text

alt text

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It is recommended to reboot after enabling it.

Running Benchmark

To benchmark network performance

https://openwrt.org/docs/guide-user/perf_and_log/benchmark.nat

The benchmark below is for WR1043NDv1 AR9132 SoC@400MHZ, anything better should easily hit wired speeds

alt text

To benchmark crypto

https://openwrt.org/docs/guide-user/perf_and_log/benchmark.openssl

Compared on the same hardware, this firmware should achieve faster crypto performance

If you need VPN performance, wireguard should perform significantly better than OpenVPN

Recovery in case of bad flash

Most Routers have a tftp recovery mode to recover from bad flash.

The generic steps are highlighted below

https://openwrt.org/docs/guide-user/troubleshooting/tftpserver

However you will need to find the specific steps for your router model.

When running tftp server remember to set static ip on your computer and turn off your computer firewall temporarily.

You can’t perform that action at this time.