7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package java.net;
26 import java.io.IOException;
27
28 /*
29 * Package private implementation of InetAddressImpl for IPv4.
30 *
31 * @since 1.4
32 */
33 final class Inet4AddressImpl implements InetAddressImpl {
34 public native String getLocalHostName() throws UnknownHostException;
35 public native InetAddress[]
36 lookupAllHostAddr(String hostname) throws UnknownHostException;
37 public native String getHostByAddr(byte[] addr) throws UnknownHostException;
38 private native boolean isReachable0(byte[] addr, int timeout, byte[] ifaddr, int ttl) throws IOException;
39
40 public synchronized InetAddress anyLocalAddress() {
41 if (anyLocalAddress == null) {
42 anyLocalAddress = new Inet4Address(); // {0x00,0x00,0x00,0x00}
43 anyLocalAddress.holder().hostName = "0.0.0.0";
44 }
45 return anyLocalAddress;
46 }
47
48 public synchronized InetAddress loopbackAddress() {
49 if (loopbackAddress == null) {
50 byte[] loopback = {0x7f,0x00,0x00,0x01};
51 loopbackAddress = new Inet4Address("localhost", loopback);
52 }
53 return loopbackAddress;
54 }
55
56 public boolean isReachable(InetAddress addr, int timeout, NetworkInterface netif, int ttl) throws IOException {
|
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package java.net;
26 import java.io.IOException;
27 import java.net.spi.InetAddressResolver.LookupPolicy;
28
29 import static java.net.spi.InetAddressResolver.LookupPolicy.IPV4;
30
31 /*
32 * Package private implementation of InetAddressImpl for IPv4.
33 *
34 * @since 1.4
35 */
36 final class Inet4AddressImpl implements InetAddressImpl {
37 public native String getLocalHostName() throws UnknownHostException;
38 public InetAddress[] lookupAllHostAddr(String hostname, LookupPolicy lookupPolicy)
39 throws UnknownHostException {
40 if ((lookupPolicy.characteristics() & IPV4) == 0) {
41 throw new UnknownHostException(hostname);
42 }
43 return lookupAllHostAddr(hostname);
44 }
45 private native InetAddress[] lookupAllHostAddr(String hostname) throws UnknownHostException;
46 public native String getHostByAddr(byte[] addr) throws UnknownHostException;
47 private native boolean isReachable0(byte[] addr, int timeout, byte[] ifaddr, int ttl) throws IOException;
48
49 public synchronized InetAddress anyLocalAddress() {
50 if (anyLocalAddress == null) {
51 anyLocalAddress = new Inet4Address(); // {0x00,0x00,0x00,0x00}
52 anyLocalAddress.holder().hostName = "0.0.0.0";
53 }
54 return anyLocalAddress;
55 }
56
57 public synchronized InetAddress loopbackAddress() {
58 if (loopbackAddress == null) {
59 byte[] loopback = {0x7f,0x00,0x00,0x01};
60 loopbackAddress = new Inet4Address("localhost", loopback);
61 }
62 return loopbackAddress;
63 }
64
65 public boolean isReachable(InetAddress addr, int timeout, NetworkInterface netif, int ttl) throws IOException {
|