This is the code behind the GNOME Shell Extension called ALL IP Addresses , available in the GNOME Shell Extension store at https://extensions.gnome.org/extension/3994/all-ip-addresses/
This extention is based upon the ALL IP Addresses extention.
I added the dynamic switch between Device interface IPs, and WAN public IPs for both IPv4 and IPv6.
This extention will only show the IP-addresses your workstation to per interface, and what is the public IP address that others can reach you from.
Uses iproute2's ip address -brief command to get list of interfaces and their IP address.
Uses curl --max-time 5 -4 icanhazip.com and curl --max-time 5 -6 icanhazip.com to find WAN public IP.
Left-click will cycle through IP address and their associated interface.
Right-click will copy to clipboard the currently displayed IP address.(this will display a notification)
In an environment where icanhazip.com is unreachable but internet connection is fine then WAN IP will not show. This is a minor limitation.
Requires iproute2 package on linux to be installed, or any equivalent ip command.
Will only update every 5 seconds.
It is possible there can be race condition, so be patient and retry.
This code is based upon a fork of ALL IP Addresses extention by Peter Havekes