io.netty.util.internal.SocketUtils Maven / Gradle / Ivy
/*
* Copyright 2016 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.util.internal;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.NetworkInterface;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.SocketException;
import java.net.SocketPermission;
import java.net.UnknownHostException;
import java.nio.channels.DatagramChannel;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.util.Enumeration;
/**
* Provides socket operations with privileges enabled. This is necessary for applications that use the
* {@link SecurityManager} to restrict {@link SocketPermission} to their application. By asserting that these
* operations are privileged, the operations can proceed even if some code in the calling chain lacks the appropriate
* {@link SocketPermission}.
*/
public final class SocketUtils {
private SocketUtils() {
}
public static void connect(final Socket socket, final SocketAddress remoteAddress, final int timeout)
throws IOException {
try {
AccessController.doPrivileged(new PrivilegedExceptionAction() {
@Override
public Void run() throws IOException {
socket.connect(remoteAddress, timeout);
return null;
}
});
} catch (PrivilegedActionException e) {
throw (IOException) e.getCause();
}
}
public static void bind(final Socket socket, final SocketAddress bindpoint) throws IOException {
try {
AccessController.doPrivileged(new PrivilegedExceptionAction() {
@Override
public Void run() throws IOException {
socket.bind(bindpoint);
return null;
}
});
} catch (PrivilegedActionException e) {
throw (IOException) e.getCause();
}
}
public static boolean connect(final SocketChannel socketChannel, final SocketAddress remoteAddress)
throws IOException {
try {
return AccessController.doPrivileged(new PrivilegedExceptionAction() {
@Override
public Boolean run() throws IOException {
return socketChannel.connect(remoteAddress);
}
});
} catch (PrivilegedActionException e) {
throw (IOException) e.getCause();
}
}
public static void bind(final SocketChannel socketChannel, final SocketAddress address) throws IOException {
try {
AccessController.doPrivileged(new PrivilegedExceptionAction() {
@Override
public Void run() throws IOException {
socketChannel.bind(address);
return null;
}
});
} catch (PrivilegedActionException e) {
throw (IOException) e.getCause();
}
}
public static SocketChannel accept(final ServerSocketChannel serverSocketChannel) throws IOException {
try {
return AccessController.doPrivileged(new PrivilegedExceptionAction() {
@Override
public SocketChannel run() throws IOException {
return serverSocketChannel.accept();
}
});
} catch (PrivilegedActionException e) {
throw (IOException) e.getCause();
}
}
public static void bind(final DatagramChannel networkChannel, final SocketAddress address) throws IOException {
try {
AccessController.doPrivileged(new PrivilegedExceptionAction() {
@Override
public Void run() throws IOException {
networkChannel.bind(address);
return null;
}
});
} catch (PrivilegedActionException e) {
throw (IOException) e.getCause();
}
}
public static SocketAddress localSocketAddress(final ServerSocket socket) {
return AccessController.doPrivileged(new PrivilegedAction() {
@Override
public SocketAddress run() {
return socket.getLocalSocketAddress();
}
});
}
public static InetAddress addressByName(final String hostname) throws UnknownHostException {
try {
return AccessController.doPrivileged(new PrivilegedExceptionAction() {
@Override
public InetAddress run() throws UnknownHostException {
return InetAddress.getByName(hostname);
}
});
} catch (PrivilegedActionException e) {
throw (UnknownHostException) e.getCause();
}
}
public static InetAddress[] allAddressesByName(final String hostname) throws UnknownHostException {
try {
return AccessController.doPrivileged(new PrivilegedExceptionAction() {
@Override
public InetAddress[] run() throws UnknownHostException {
return InetAddress.getAllByName(hostname);
}
});
} catch (PrivilegedActionException e) {
throw (UnknownHostException) e.getCause();
}
}
public static InetSocketAddress socketAddress(final String hostname, final int port) {
return AccessController.doPrivileged(new PrivilegedAction() {
@Override
public InetSocketAddress run() {
return new InetSocketAddress(hostname, port);
}
});
}
public static Enumeration addressesFromNetworkInterface(final NetworkInterface intf) {
return AccessController.doPrivileged(new PrivilegedAction>() {
@Override
public Enumeration run() {
return intf.getInetAddresses();
}
});
}
public static InetAddress loopbackAddress() {
return AccessController.doPrivileged(new PrivilegedAction() {
@Override
public InetAddress run() {
if (PlatformDependent.javaVersion() >= 7) {
return InetAddress.getLoopbackAddress();
}
try {
return InetAddress.getByName(null);
} catch (UnknownHostException e) {
throw new IllegalStateException(e);
}
}
});
}
public static byte[] hardwareAddressFromNetworkInterface(final NetworkInterface intf) throws SocketException {
try {
return AccessController.doPrivileged(new PrivilegedExceptionAction() {
@Override
public byte[] run() throws SocketException {
return intf.getHardwareAddress();
}
});
} catch (PrivilegedActionException e) {
throw (SocketException) e.getCause();
}
}
}