Help me update my HFSC shaper scripts for fw4/nftables

[Hudra]

I've made several changes to the script that should further simplify the setup and logic of the script and pushed them to my github repo.

In addition to fixing a few bugs, I've implemented a new method for shaping inbound traffic (ingress) without the need for a virtual Ethernet (veth) interface, and it works even when there are multiple ports/bridges/including Wi-Fi on the LAN side,. This new method uses tc-ctinfo.
Simply put, DSCP markings are saved in conntrack during upload (egress) and then restored during download (ingress). This new way of shaping download traffic could potentially make the veth method and the method where traffic control is applied directly on the LAN interface obsolete. However, the function that allows me to easily store the DSCPs in conntrack:

ct mark set ip dscp or 128 counter

only works from nftables version 1.0.8 onwards, and since I don't know if every user has this version yet, there are now three options for shaping download traffic:

DOWNSHAPING_METHOD="ctinfo" # Options: "veth", "ctinfo", "lan"

The init script should ideally check whether kmod-sched-ctinfo is installed at startup. To determine whether your version of nftables is compatible, you can execute the following command: nft --version

Ctinfo should even work if DSCPs are being washed during upload or download. At least it did when I tested it...

Special thanks to @Lynx. cake-qos-simple was a big help.

@Hudra

Quick Setup Guide

Before installing the SimpleHFSCgamerscript, make sure to:

1. Disable any existing QoS services such as SQM or Qosify on your router to avoid conflicts with the new script.
2. Reboot your router to clear out all old settings for a clean start.
3. Install the SimpleHFSCgamerscript following the provided instructions, then adjust settings to suit your network needs:

@Hudra

How to Use the SimpleHFSCgamerscript

First, download the scripts to your OpenWrt router with this command:

wget -O /etc/init.d/SimpleHFSCgamerscript https://raw.githubusercontent.com/hudra0/routerperf/master/SimpleHFSCgamerscript && chmod +x /etc/init.d/SimpleHFSCgamerscript && wget -O /etc/SimpleHFSCgamerscript.sh https://raw.githubusercontent.com/hudra0/routerperf/master/SimpleHFSCgamerscript.sh && chmod +x /etc/SimpleHFSCgamerscript.sh

This command does a few things:

• Downloads the init script to /etc/init.d/SimpleHFSCgamerscript and makes it executable.
• Grabs the main script and saves it to /etc/SimpleHFSCgamerscript.sh, then makes that executable too.

Before you kick off the service, you might want to tweak the main script a bit to fit your network. Look for variables like WAN, LAN, UPRATE, DOWNRATE, etc., in the /etc/SimpleHFSCgamerscript.sh file. Just open it up in any text editor and adjust as needed.

To get everything rolling, enable and start the service with:

/etc/init.d/SimpleHFSCgamerscript enable
/etc/init.d/SimpleHFSCgamerscript start
## or
service SimpleHFSCgamerscript enable
service SimpleHFSCgamerscript start

... or via LUCI (System/Startup)

To make sure everything's running smoothly, you can check the service status:

/etc/init.d/SimpleHFSCgamerscript status