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75 lines
2.1 KiB
75 lines
2.1 KiB
/*
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* Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package java.net;
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import java.io.IOException;
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/*
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* Package private implementation of InetAddressImpl for IPv4.
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*
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* @since 1.4
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*/
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class Inet4AddressImpl implements InetAddressImpl {
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public native String getLocalHostName() throws UnknownHostException;
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public native InetAddress[]
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lookupAllHostAddr(String hostname) throws UnknownHostException;
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public native String getHostByAddr(byte[] addr) throws UnknownHostException;
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private native boolean isReachable0(byte[] addr, int timeout, byte[] ifaddr, int ttl) throws IOException;
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public synchronized InetAddress anyLocalAddress() {
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if (anyLocalAddress == null) {
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anyLocalAddress = new Inet4Address(); // {0x00,0x00,0x00,0x00}
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anyLocalAddress.holder().hostName = "0.0.0.0";
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}
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return anyLocalAddress;
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}
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public synchronized InetAddress loopbackAddress() {
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if (loopbackAddress == null) {
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byte[] loopback = {0x7f,0x00,0x00,0x01};
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loopbackAddress = new Inet4Address("localhost", loopback);
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}
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return loopbackAddress;
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}
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public boolean isReachable(InetAddress addr, int timeout, NetworkInterface netif, int ttl) throws IOException {
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byte[] ifaddr = null;
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if (netif != null) {
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/*
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* Let's make sure we use an address of the proper family
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*/
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java.util.Enumeration<InetAddress> it = netif.getInetAddresses();
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InetAddress inetaddr = null;
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while (!(inetaddr instanceof Inet4Address) &&
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it.hasMoreElements())
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inetaddr = it.nextElement();
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if (inetaddr instanceof Inet4Address)
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ifaddr = inetaddr.getAddress();
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}
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return isReachable0(addr.getAddress(), timeout, ifaddr, ttl);
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}
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private InetAddress anyLocalAddress;
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private InetAddress loopbackAddress;
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}
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