update-ip.sh

#!/bin/bash

# PWK / TryHackMe / HTB / etc.
# Automatically checks for VPN ip addresses in this order, then exports the first one it finds:
# TAP0 -> TUN0 -> ETH0 (non vpn)

# ~/.config/fish/config.fish
# set IP (bash /home/adam/.scripts/update-ip.sh)

# ~/.zshrc
# source /home/adam/.scripts/update-ip.sh

IP=""
IP1=`ip addr | grep inet | grep tap0 | awk -F" " '{print $2}'| sed -e 's/\/.*$//'`;
IP2=`ip addr | grep inet | grep tun0 | awk -F" " '{print $2}'| sed -e 's/\/.*$//'`;
IP3=`ip addr | grep inet | grep eth0 | awk -F" " '{print $2}'| sed -e 's/\/.*$//'`;

if [[ ! -z "$IP1" ]]
then
    IP=$IP1
elif [[ ! -z "$IP2" ]]
then
    IP=$IP2
else
    IP=$IP3
fi

export IP;
echo "$IP";