SubnetIpAdresses.kt

private fun getAllWifiSubnetIpAddresses(): List<InetAddress> {
    val wifiMgr = getSystemService(WIFI_SERVICE) as WifiManager
    val wlanAddr = NetworkUtils.intToInetAddress(wifiMgr.dhcpInfo.ipAddress)

    return NetworkInterface.getNetworkInterfaces().toList()
            .flatMap { it.interfaceAddresses }
            .filter { it.address == wlanAddr }
            .map { SubnetUtils(it.address.hostAddress + "/" + it.networkPrefixLength) }
            .flatMap { it.info.allAddresses.asList() }
            .map { Inet4Address.getByName(it) }
}