Changed endpoint, so that localhost/127 as the host, really means LOOPBACK, instead of previously which was get the local lan IP
This commit is contained in:
nathan
parent
5758e66ca8
commit
6a1eaf59fc
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@ -0,0 +1,231 @@
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package dorkbox.util;
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import java.io.BufferedReader;
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import java.io.InputStreamReader;
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import java.net.*;
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import java.util.Enumeration;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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*
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*/
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public final
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class NetworkUtil {
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/**
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* Returns an <code>InetAddress</code> object encapsulating what is most likely the machine's LAN IP address.
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* <p/>
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* This method is intended for use as a replacement of JDK method <code>InetAddress.getLocalHost</code>, because
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* that method is ambiguous on Linux systems. Linux systems enumerate the loopback network interface the same
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* way as regular LAN network interfaces, but the JDK <code>InetAddress.getLocalHost</code> method does not
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* specify the algorithm used to select the address returned under such circumstances, and will often return the
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* loopback address, which is not valid for network communication. Details
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* <a href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4665037">here</a>.
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* <p/>
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* This method will scan all IP addresses on all network interfaces on the host machine to determine the IP address
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* most likely to be the machine's LAN address. If the machine has multiple IP addresses, this method will prefer
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* a site-local IP address (e.g. 192.168.x.x or 10.10.x.x, usually IPv4) if the machine has one (and will return the
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* first site-local address if the machine has more than one), but if the machine does not hold a site-local
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* address, this method will return simply the first non-loopback address found (IPv4 or IPv6).
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* <p/>
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* If this method cannot find a non-loopback address using this selection algorithm, it will fall back to
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* calling and returning the result of JDK method <code>InetAddress.getLocalHost</code>.
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* <p/>
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*
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* @throws UnknownHostException If the LAN address of the machine cannot be found.
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* <p/>
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* From: https://issues.apache.org/jira/browse/JCS-40
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*/
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public static
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InetAddress getLocalHost() throws UnknownHostException {
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try {
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InetAddress candidateAddress = null;
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// Iterate all NICs (network interface cards)...
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for (Enumeration<NetworkInterface> ifaces = NetworkInterface.getNetworkInterfaces(); ifaces.hasMoreElements(); ) {
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NetworkInterface iface = ifaces.nextElement();
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// Iterate all IP addresses assigned to each card...
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for (Enumeration<InetAddress> inetAddrs = iface.getInetAddresses(); inetAddrs.hasMoreElements(); ) {
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InetAddress inetAddr = inetAddrs.nextElement();
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if (!inetAddr.isLoopbackAddress()) {
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if (inetAddr.isSiteLocalAddress()) {
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// Found non-loopback site-local address. Return it immediately...
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return inetAddr;
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}
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else if (candidateAddress == null) {
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// Found non-loopback address, but not necessarily site-local.
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// Store it as a candidate to be returned if site-local address is not subsequently found...
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candidateAddress = inetAddr;
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// Note that we don't repeatedly assign non-loopback non-site-local addresses as candidates,
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// only the first. For subsequent iterations, candidate will be non-null.
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}
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}
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}
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}
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if (candidateAddress != null) {
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// We did not find a site-local address, but we found some other non-loopback address.
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// Server might have a non-site-local address assigned to its NIC (or it might be running
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// IPv6 which deprecates the "site-local" concept).
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// Return this non-loopback candidate address...
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return candidateAddress;
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}
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// At this point, we did not find a non-loopback address.
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// Fall back to returning whatever InetAddress.getLocalHost() returns...
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InetAddress jdkSuppliedAddress = InetAddress.getLocalHost();
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if (jdkSuppliedAddress == null) {
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throw new UnknownHostException("The JDK InetAddress.getLocalHost() method unexpectedly returned null.");
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}
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return jdkSuppliedAddress;
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} catch (Exception e) {
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UnknownHostException unknownHostException = new UnknownHostException("Failed to determine LAN address: " + e);
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unknownHostException.initCause(e);
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throw unknownHostException;
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}
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}
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/**
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* This will retrieve your IP address via an HTTP server.
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* <p/>
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* <b>NOTE: Use DnsClient.getPublicIp() instead. It's much faster and more reliable as it uses DNS.</b>
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*
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* @return the public IP address if found, or null if it didn't find it
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*/
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@Deprecated
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public static
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String getPublicIpViaHttp() {
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// method 1: use DNS servers
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// dig +short myip.opendns.com @resolver1.opendns.com
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// method 2: use public http servers
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// @formatter:off
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final String websites[] = {"http://ip.dorkbox.com/",
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"http://ip.javalauncher.com/",
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"http://checkip.dyndns.com/",
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"http://checkip.dyn.com/",
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"http://curlmyip.com/",
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"http://tnx.nl/ip",
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"http://ipecho.net/plain",
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"http://icanhazip.com/",
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"http://ip.appspot.com/",};
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// @formatter:on
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// loop, since they won't always work.
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for (int i = 0; i < websites.length; i++) {
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try {
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URL autoIP = new URL(websites[i]);
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BufferedReader in = new BufferedReader(new InputStreamReader(autoIP.openStream()));
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String response = in.readLine()
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.trim();
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in.close();
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Pattern pattern = Pattern.compile("\\b\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\b");
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Matcher matcher = pattern.matcher(response);
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if (matcher.find()) {
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return matcher.group()
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.trim();
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}
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} catch (Exception ignored) {
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}
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}
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return null;
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}
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/**
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* Tries to retrieve the IP address from the NIC. Order is ETHx -> EMx -> WLANx
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*
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* @return null if not found
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*/
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public static
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InetAddress getIpAddressesFromNic() {
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try {
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Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();
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while (nets.hasMoreElements()) {
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NetworkInterface nextElement = nets.nextElement();
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String name = nextElement.getName();
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// we only want to use ethX addresses!
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if (name.startsWith("eth")) {
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Enumeration<InetAddress> inetAddresses = nextElement.getInetAddresses();
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while (inetAddresses.hasMoreElements()) {
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InetAddress address = inetAddresses.nextElement();
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// we only support IPV4 addresses.
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if (!address.isLoopbackAddress() && address instanceof Inet4Address) {
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return address;
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}
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}
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}
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}
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// it didn't work with ethX, so try emX!
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while (nets.hasMoreElements()) {
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nets = NetworkInterface.getNetworkInterfaces();
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NetworkInterface nextElement = nets.nextElement();
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String name = nextElement.getName();
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// we only want to use emX addresses!
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if (name.startsWith("em")) {
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Enumeration<InetAddress> inetAddresses = nextElement.getInetAddresses();
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while (inetAddresses.hasMoreElements()) {
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InetAddress address = inetAddresses.nextElement();
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// we only support IPV4 addresses.
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if (!address.isLoopbackAddress() && address instanceof Inet4Address) {
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return address;
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}
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}
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}
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}
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// it didn't work with emX, so try enX!
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while (nets.hasMoreElements()) {
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nets = NetworkInterface.getNetworkInterfaces();
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NetworkInterface nextElement = nets.nextElement();
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String name = nextElement.getName();
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// we only want to use enX addresses!
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if (name.startsWith("en")) {
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Enumeration<InetAddress> inetAddresses = nextElement.getInetAddresses();
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while (inetAddresses.hasMoreElements()) {
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InetAddress address = inetAddresses.nextElement();
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// we only support IPV4 addresses.
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if (!address.isLoopbackAddress() && address instanceof Inet4Address) {
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return address;
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}
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}
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}
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}
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// it didn't work with ethX, so try wifi!
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while (nets.hasMoreElements()) {
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nets = NetworkInterface.getNetworkInterfaces();
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NetworkInterface nextElement = nets.nextElement();
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String name = nextElement.getName();
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// we only want to use wlanX addresses!
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if (name.startsWith("wlan")) {
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Enumeration<InetAddress> inetAddresses = nextElement.getInetAddresses();
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while (inetAddresses.hasMoreElements()) {
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InetAddress address = inetAddresses.nextElement();
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// we only support IPV4 addresses.
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if (!address.isLoopbackAddress() && address instanceof Inet4Address) {
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return address;
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}
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}
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}
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}
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} catch (SocketException ignored) {
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}
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return null;
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}
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private
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NetworkUtil() {
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}
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}
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@ -19,11 +19,11 @@ import org.bouncycastle.crypto.digests.SHA256Digest;
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import java.io.*;
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import java.lang.reflect.Field;
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import java.net.*;
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import java.util.*;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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@SuppressWarnings("unused")
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public final
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@ -689,218 +689,6 @@ class Sys {
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System.err.println(builder.toString());
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}
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/**
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* Returns an <code>InetAddress</code> object encapsulating what is most likely the machine's LAN IP address.
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* <p/>
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* This method is intended for use as a replacement of JDK method <code>InetAddress.getLocalHost</code>, because
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* that method is ambiguous on Linux systems. Linux systems enumerate the loopback network interface the same
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* way as regular LAN network interfaces, but the JDK <code>InetAddress.getLocalHost</code> method does not
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* specify the algorithm used to select the address returned under such circumstances, and will often return the
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* loopback address, which is not valid for network communication. Details
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* <a href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4665037">here</a>.
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* <p/>
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* This method will scan all IP addresses on all network interfaces on the host machine to determine the IP address
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* most likely to be the machine's LAN address. If the machine has multiple IP addresses, this method will prefer
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* a site-local IP address (e.g. 192.168.x.x or 10.10.x.x, usually IPv4) if the machine has one (and will return the
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* first site-local address if the machine has more than one), but if the machine does not hold a site-local
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* address, this method will return simply the first non-loopback address found (IPv4 or IPv6).
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* <p/>
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* If this method cannot find a non-loopback address using this selection algorithm, it will fall back to
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* calling and returning the result of JDK method <code>InetAddress.getLocalHost</code>.
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* <p/>
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*
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* @throws UnknownHostException If the LAN address of the machine cannot be found.
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* <p/>
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* From: https://issues.apache.org/jira/browse/JCS-40
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*/
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public static
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InetAddress getLocalHostLanAddress() throws UnknownHostException {
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try {
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InetAddress candidateAddress = null;
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// Iterate all NICs (network interface cards)...
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for (Enumeration<NetworkInterface> ifaces = NetworkInterface.getNetworkInterfaces(); ifaces.hasMoreElements(); ) {
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NetworkInterface iface = ifaces.nextElement();
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// Iterate all IP addresses assigned to each card...
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for (Enumeration<InetAddress> inetAddrs = iface.getInetAddresses(); inetAddrs.hasMoreElements(); ) {
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InetAddress inetAddr = inetAddrs.nextElement();
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if (!inetAddr.isLoopbackAddress()) {
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if (inetAddr.isSiteLocalAddress()) {
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// Found non-loopback site-local address. Return it immediately...
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return inetAddr;
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}
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else if (candidateAddress == null) {
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// Found non-loopback address, but not necessarily site-local.
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// Store it as a candidate to be returned if site-local address is not subsequently found...
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candidateAddress = inetAddr;
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// Note that we don't repeatedly assign non-loopback non-site-local addresses as candidates,
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// only the first. For subsequent iterations, candidate will be non-null.
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}
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}
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}
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}
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if (candidateAddress != null) {
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// We did not find a site-local address, but we found some other non-loopback address.
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// Server might have a non-site-local address assigned to its NIC (or it might be running
|
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// IPv6 which deprecates the "site-local" concept).
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// Return this non-loopback candidate address...
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return candidateAddress;
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}
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// At this point, we did not find a non-loopback address.
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// Fall back to returning whatever InetAddress.getLocalHost() returns...
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InetAddress jdkSuppliedAddress = InetAddress.getLocalHost();
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if (jdkSuppliedAddress == null) {
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throw new UnknownHostException("The JDK InetAddress.getLocalHost() method unexpectedly returned null.");
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}
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return jdkSuppliedAddress;
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} catch (Exception e) {
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UnknownHostException unknownHostException = new UnknownHostException("Failed to determine LAN address: " + e);
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unknownHostException.initCause(e);
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throw unknownHostException;
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}
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}
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/**
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* This will retrieve your IP address via an HTTP server.
|
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* <p/>
|
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* <b>NOTE: Use DnsClient.getPublicIp() instead. It's much faster and more reliable as it uses DNS.</b>
|
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*
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* @return the public IP address if found, or null if it didn't find it
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*/
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@Deprecated
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public static
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String getPublicIpViaHttp() {
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// method 1: use DNS servers
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// dig +short myip.opendns.com @resolver1.opendns.com
|
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|
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// method 2: use public http servers
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// @formatter:off
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final String websites[] = {"http://ip.dorkbox.com/",
|
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"http://ip.javalauncher.com/",
|
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"http://checkip.dyndns.com/",
|
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"http://checkip.dyn.com/",
|
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"http://curlmyip.com/",
|
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"http://tnx.nl/ip",
|
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"http://ipecho.net/plain",
|
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"http://icanhazip.com/",
|
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"http://ip.appspot.com/",};
|
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// @formatter:on
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|
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// loop, since they won't always work.
|
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for (int i = 0; i < websites.length; i++) {
|
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try {
|
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URL autoIP = new URL(websites[i]);
|
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BufferedReader in = new BufferedReader(new InputStreamReader(autoIP.openStream()));
|
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String response = in.readLine()
|
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.trim();
|
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in.close();
|
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|
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Pattern pattern = Pattern.compile("\\b\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\b");
|
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Matcher matcher = pattern.matcher(response);
|
||||
if (matcher.find()) {
|
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return matcher.group()
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.trim();
|
||||
}
|
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} catch (Exception ignored) {
|
||||
}
|
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}
|
||||
|
||||
return null;
|
||||
}
|
||||
|
||||
/**
|
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* Tries to retrieve the IP address from the NIC. Order is ETHx -> EMx -> WLANx
|
||||
*
|
||||
* @return null if not found
|
||||
*/
|
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public static
|
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InetAddress getIpAddressesFromNic() {
|
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try {
|
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Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();
|
||||
while (nets.hasMoreElements()) {
|
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NetworkInterface nextElement = nets.nextElement();
|
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String name = nextElement.getName();
|
||||
|
||||
// we only want to use ethX addresses!
|
||||
if (name.startsWith("eth")) {
|
||||
Enumeration<InetAddress> inetAddresses = nextElement.getInetAddresses();
|
||||
|
||||
while (inetAddresses.hasMoreElements()) {
|
||||
InetAddress address = inetAddresses.nextElement();
|
||||
// we only support IPV4 addresses.
|
||||
if (!address.isLoopbackAddress() && address instanceof Inet4Address) {
|
||||
return address;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// it didn't work with ethX, so try emX!
|
||||
while (nets.hasMoreElements()) {
|
||||
nets = NetworkInterface.getNetworkInterfaces();
|
||||
NetworkInterface nextElement = nets.nextElement();
|
||||
String name = nextElement.getName();
|
||||
|
||||
// we only want to use emX addresses!
|
||||
if (name.startsWith("em")) {
|
||||
Enumeration<InetAddress> inetAddresses = nextElement.getInetAddresses();
|
||||
|
||||
while (inetAddresses.hasMoreElements()) {
|
||||
InetAddress address = inetAddresses.nextElement();
|
||||
// we only support IPV4 addresses.
|
||||
if (!address.isLoopbackAddress() && address instanceof Inet4Address) {
|
||||
return address;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// it didn't work with emX, so try enX!
|
||||
while (nets.hasMoreElements()) {
|
||||
nets = NetworkInterface.getNetworkInterfaces();
|
||||
NetworkInterface nextElement = nets.nextElement();
|
||||
String name = nextElement.getName();
|
||||
|
||||
// we only want to use enX addresses!
|
||||
if (name.startsWith("en")) {
|
||||
Enumeration<InetAddress> inetAddresses = nextElement.getInetAddresses();
|
||||
|
||||
while (inetAddresses.hasMoreElements()) {
|
||||
InetAddress address = inetAddresses.nextElement();
|
||||
// we only support IPV4 addresses.
|
||||
if (!address.isLoopbackAddress() && address instanceof Inet4Address) {
|
||||
return address;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// it didn't work with ethX, so try wifi!
|
||||
while (nets.hasMoreElements()) {
|
||||
nets = NetworkInterface.getNetworkInterfaces();
|
||||
NetworkInterface nextElement = nets.nextElement();
|
||||
String name = nextElement.getName();
|
||||
|
||||
// we only want to use wlanX addresses!
|
||||
if (name.startsWith("wlan")) {
|
||||
Enumeration<InetAddress> inetAddresses = nextElement.getInetAddresses();
|
||||
|
||||
while (inetAddresses.hasMoreElements()) {
|
||||
InetAddress address = inetAddresses.nextElement();
|
||||
// we only support IPV4 addresses.
|
||||
if (!address.isLoopbackAddress() && address instanceof Inet4Address) {
|
||||
return address;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
} catch (SocketException ignored) {
|
||||
}
|
||||
|
||||
return null;
|
||||
}
|
||||
|
||||
private
|
||||
Sys() {
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue