#!/bin/bash
nets=()
while IFS='\n' read -r net; do
  net=${net%/*}
  net4=$(ip -br -4 addr show to $net 2>/dev/null|awk '{print $1}'|tr '\n' ','|sed 's/,$//')
  [[ -n $net4 ]] && nets+=("$net4 = $net;")
done <<< $(ip -br -4 addr|awk '/^(br|bond|eth|wg)[0-9]+(\.[0-9]+)?/ {print $3}'|uniq -d)

while IFS='\n' read -r net; do
  net=${net%/*}
  net6=$(ip -br -6 addr show to $net 2>/dev/null|awk '{print $1}'|tr '\n' ','|sed 's/,$//')
  [[ -n $net6 ]] && nets+=("$net6 = $net;")
done <<< $(ip -br -6 addr|awk '/^(br|bond|eth|wg)[0-9]+(\.[0-9]+)?/ && $3 !~ "^fe80" {print $3}'|uniq -d)

[[ -n $nets ]] && echo "<i class='fa fa-warning' style='margin-right:8px'></i>${nets[@]}"|sed 's/;$//'