check all systemd-networkd defined wireguard peers if needed.

refresh all peers endpoints in /etc/systemd/network/*.netdev with a kind of wireguard.
If the latest handshake is older then 135 seconds, re-apply the endpoint. This wil force a dns lookup. This script is intended for wireguard endpoints who have a dynamic dns peer.

see https://git.zx2c4.com/WireGuard/tree/contrib/examples/reresolve-dns/reresolve-dns.sh for a wireguard.conf native version.

to install, as root execute the following:

curl -s https://raw.githubusercontent.com/pvcbe/systemd-wireguard-refresh/master/install.sh | bash

to remove the script's and timers:

curl -s https://raw.githubusercontent.com/pvcbe/systemd-wireguard-refresh/master/remove.sh | bash