package server

import (
	"fmt"
	"net"
)

// GetLANIPs returns all non-loopback IPv4 addresses.
func GetLANIPs() ([]string, error) {
	addrs, err := net.InterfaceAddrs()
	if err != nil {
		return nil, err
	}
	var ips []string
	for _, addr := range addrs {
		if ipNet, ok := addr.(*net.IPNet); ok && !ipNet.IP.IsLoopback() && ipNet.IP.To4() != nil {
			ips = append(ips, ipNet.IP.String())
		}
	}
	if len(ips) == 0 {
		return nil, fmt.Errorf("no LAN IP found")
	}
	return ips, nil
}