NetworkManager Scripts

Run interface specific scripts on de/activating an interface with network manager.

This is a shameless rip-off from rabin.io.

On every connect/disconnect NetworkManager runs all scripts in the folder /etc/NetworkManager/dispatcher.d. This repository contains the 88-MASTER-DISPATCHER script which gets the following two variables from NetworkManager:

$1 = Device name, e.g. ppp0, eth0
$2 = Connection State, up, down, vpn-up, vpn-down

Depending on the STATE and CONNECTION_UUID the script 88-MASTER-DISPATCHER runs all scripts under /etc/NetworkManager/dispatcher.d/$CONNECTION_UUID/$STATE/

Installation

git clone https://github.com/Madic-/NetworkManager-Scripts.git
sudo cp -r ./NetworkManager-Scripts/scripts/* /etc/NetworkManager/dispatcher.d/

Configuration

Create the required folder(s) beneath /etc/NetworkManager/dispatcher.d. The state depends on the interface type

# tree /etc/NetworkManager/dispatcher.d

/etc/NetworkManager/dispatcher.d
├── 57874773-c8f2-4c37-966e-6caa756f1c5f
│   ├── vpn-down
│   │   └── enable-ipv6
│   └── vpn-up
│       └── disable-ipv6
│       └── mtr
├── 88-MASTER-DISPATCHER

You can get the connection uuid via nmcli.

nmcli --fields name,uuid -t connection show
Ethernet connection:73b56263-0306-463b-a179-1b86280950d4
wg-overlay:33a1412d-9172-47ac-b79e-d016d41d4721
docker0:3fb90a71-d42b-4521-949e-b2be16531f4f
Freifunk:22e4c57f-49fd-4de6-8762-fd5033140e2d

Log

The script writes a logfile from where you can additionaly get the STATE and CONNECTION_UUID.

less /var/log/NetworkManager_dispatcher.d.log

Further information

More information about the NetworkManager dispatcher can be found in the Arch Wiki.