package com.smatek.px30smatekapi.utils;
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import android.text.TextUtils;
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import android.util.Log;
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import java.util.regex.Pattern;
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public class EthernetUtils {
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public boolean checkIPValue(String ipAddr, String gateway, String netMask, String dns1, String dns2) {
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boolean enable = false;
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Pattern pattern = Pattern.compile("(^((\\d|[01]?\\d\\d|2[0-4]\\d|25[0-5])\\.){3}(\\d|[01]?\\d\\d|2[0-4]\\d|25[0-5])$)|^(\\d|[1-2]\\d|3[0-2])$"); /*check subnet mask*/
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if (isValidIpAddress(ipAddr) && isValidIpAddress(gateway)
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&& isValidIpAddress(dns1) && (pattern.matcher(netMask).matches())) {
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if (TextUtils.isEmpty(dns2)) { // 为空可以不考虑
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enable = true;
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} else {
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if (isValidIpAddress(dns2)) {
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enable = true;
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} else {
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enable = false;
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}
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}
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} else {
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enable = false;
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}
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return enable;
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}
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private boolean isValidIpAddress(String value) {
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int start = 0;
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int end = value.indexOf('.');
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int numBlocks = 0;
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while (start < value.length()) {
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if (-1 == end) {
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end = value.length();
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}
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try {
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int block = Integer.parseInt(value.substring(start, end));
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if ((block > 255) || (block < 0)) {
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Log.w("EthernetIP",
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"isValidIpAddress() : invalid 'block', block = "
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+ block);
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return false;
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}
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} catch (NumberFormatException e) {
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Log.w("EthernetIP", "isValidIpAddress() : e = " + e);
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return false;
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}
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numBlocks++;
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start = end + 1;
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end = value.indexOf('.', start);
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}
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return numBlocks == 4;
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}
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}
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