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1
7 package java.net;
8 import java.io.IOException  ;
9
10
15 class Inet4AddressImpl implements InetAddressImpl {
16 public native String getLocalHostName() throws UnknownHostException ;
17 public native InetAddress []
18 lookupAllHostAddr(String hostname) throws UnknownHostException ;
19 public native String getHostByAddr(byte[] addr) throws UnknownHostException ;
20 private native boolean isReachable0(byte[] addr, int timeout, byte[] ifaddr, int ttl) throws IOException ;
21
22 public synchronized InetAddress anyLocalAddress() {
23 if (anyLocalAddress == null) {
24 anyLocalAddress = new Inet4Address (); anyLocalAddress.hostName = "0.0.0.0";
26 }
27 return anyLocalAddress;
28 }
29
30 public synchronized InetAddress loopbackAddress() {
31 if (loopbackAddress == null) {
32 byte[] loopback = {0x7f,0x00,0x00,0x01};
33 loopbackAddress = new Inet4Address ("localhost", loopback);
34 }
35 return loopbackAddress;
36 }
37
38 public boolean isReachable(InetAddress addr, int timeout, NetworkInterface netif, int ttl) throws IOException {
39 byte[] ifaddr = null;
40 if (netif != null) {
41
44 java.util.Enumeration it = netif.getInetAddresses();
45 InetAddress inetaddr = null;
46 while (!(inetaddr instanceof Inet4Address ) &&
47 it.hasMoreElements())
48 inetaddr = (InetAddress ) it.nextElement();
49 if (inetaddr instanceof Inet4Address )
50 ifaddr = inetaddr.getAddress();
51 }
52 return isReachable0(addr.getAddress(), timeout, ifaddr, ttl);
53 }
54 private InetAddress anyLocalAddress;
55 private InetAddress loopbackAddress;
56 }
57
58 |
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