author | henryjen |
Tue, 10 Jun 2014 16:18:54 -0700 | |
changeset 24865 | 09b1d992ca72 |
parent 23927 | 225d01ae6469 |
child 25522 | 10d789df41bb |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1995, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.net; |
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import java.io.IOException; |
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import java.nio.channels.DatagramChannel; |
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import java.security.AccessController; |
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import java.security.PrivilegedExceptionAction; |
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import java.util.Set; |
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import java.util.Collections; |
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/** |
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* This class represents a socket for sending and receiving datagram packets. |
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* |
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* <p>A datagram socket is the sending or receiving point for a packet |
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* delivery service. Each packet sent or received on a datagram socket |
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* is individually addressed and routed. Multiple packets sent from |
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* one machine to another may be routed differently, and may arrive in |
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* any order. |
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* |
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* <p> Where possible, a newly constructed {@code DatagramSocket} has the |
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* {@link SocketOptions#SO_BROADCAST SO_BROADCAST} socket option enabled so as |
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* to allow the transmission of broadcast datagrams. In order to receive |
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* broadcast packets a DatagramSocket should be bound to the wildcard address. |
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* In some implementations, broadcast packets may also be received when |
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* a DatagramSocket is bound to a more specific address. |
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* <p> |
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* Example: |
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* {@code |
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* DatagramSocket s = new DatagramSocket(null); |
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* s.bind(new InetSocketAddress(8888)); |
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* } |
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* Which is equivalent to: |
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* {@code |
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* DatagramSocket s = new DatagramSocket(8888); |
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* } |
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* Both cases will create a DatagramSocket able to receive broadcasts on |
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* UDP port 8888. |
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* |
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* @author Pavani Diwanji |
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* @see java.net.DatagramPacket |
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* @see java.nio.channels.DatagramChannel |
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* @since 1.0 |
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*/ |
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public |
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class DatagramSocket implements java.io.Closeable { |
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/** |
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* Various states of this socket. |
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*/ |
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private boolean created = false; |
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private boolean bound = false; |
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private boolean closed = false; |
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private Object closeLock = new Object(); |
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/* |
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* The implementation of this DatagramSocket. |
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*/ |
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DatagramSocketImpl impl; |
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/** |
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* Are we using an older DatagramSocketImpl? |
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*/ |
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boolean oldImpl = false; |
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/* |
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* Connection state: |
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* ST_NOT_CONNECTED = socket not connected |
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* ST_CONNECTED = socket connected |
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* ST_CONNECTED_NO_IMPL = socket connected but not at impl level |
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*/ |
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static final int ST_NOT_CONNECTED = 0; |
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static final int ST_CONNECTED = 1; |
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static final int ST_CONNECTED_NO_IMPL = 2; |
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int connectState = ST_NOT_CONNECTED; |
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/* |
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* Connected address & port |
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*/ |
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InetAddress connectedAddress = null; |
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int connectedPort = -1; |
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/** |
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* Connects this socket to a remote socket address (IP address + port number). |
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* Binds socket if not already bound. |
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* |
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* @param address The remote address. |
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* @param port The remote port |
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* @throws SocketException if binding the socket fails. |
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*/ |
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private synchronized void connectInternal(InetAddress address, int port) throws SocketException { |
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if (port < 0 || port > 0xFFFF) { |
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throw new IllegalArgumentException("connect: " + port); |
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} |
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if (address == null) { |
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throw new IllegalArgumentException("connect: null address"); |
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} |
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checkAddress (address, "connect"); |
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if (isClosed()) |
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return; |
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SecurityManager security = System.getSecurityManager(); |
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if (security != null) { |
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if (address.isMulticastAddress()) { |
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security.checkMulticast(address); |
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} else { |
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security.checkConnect(address.getHostAddress(), port); |
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security.checkAccept(address.getHostAddress(), port); |
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} |
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} |
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if (!isBound()) |
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bind(new InetSocketAddress(0)); |
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// old impls do not support connect/disconnect |
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if (oldImpl || (impl instanceof AbstractPlainDatagramSocketImpl && |
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((AbstractPlainDatagramSocketImpl)impl).nativeConnectDisabled())) { |
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connectState = ST_CONNECTED_NO_IMPL; |
141 |
} else { |
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try { |
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getImpl().connect(address, port); |
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// socket is now connected by the impl |
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connectState = ST_CONNECTED; |
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} catch (SocketException se) { |
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// connection will be emulated by DatagramSocket |
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connectState = ST_CONNECTED_NO_IMPL; |
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} |
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} |
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connectedAddress = address; |
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connectedPort = port; |
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} |
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158 |
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/** |
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* Constructs a datagram socket and binds it to any available port |
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* on the local host machine. The socket will be bound to the |
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* {@link InetAddress#isAnyLocalAddress wildcard} address, |
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* an IP address chosen by the kernel. |
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* |
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* <p>If there is a security manager, |
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* its {@code checkListen} method is first called |
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* with 0 as its argument to ensure the operation is allowed. |
168 |
* This could result in a SecurityException. |
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* |
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* @exception SocketException if the socket could not be opened, |
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* or the socket could not bind to the specified local port. |
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* @exception SecurityException if a security manager exists and its |
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* {@code checkListen} method doesn't allow the operation. |
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* |
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* @see SecurityManager#checkListen |
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*/ |
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public DatagramSocket() throws SocketException { |
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this(new InetSocketAddress(0)); |
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} |
180 |
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/** |
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* Creates an unbound datagram socket with the specified |
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* DatagramSocketImpl. |
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* |
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* @param impl an instance of a <B>DatagramSocketImpl</B> |
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* the subclass wishes to use on the DatagramSocket. |
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* @since 1.4 |
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*/ |
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protected DatagramSocket(DatagramSocketImpl impl) { |
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if (impl == null) |
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throw new NullPointerException(); |
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this.impl = impl; |
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checkOldImpl(); |
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} |
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/** |
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* Creates a datagram socket, bound to the specified local |
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* socket address. |
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* <p> |
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* If, if the address is {@code null}, creates an unbound socket. |
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* |
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* <p>If there is a security manager, |
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* its {@code checkListen} method is first called |
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* with the port from the socket address |
205 |
* as its argument to ensure the operation is allowed. |
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* This could result in a SecurityException. |
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* |
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* @param bindaddr local socket address to bind, or {@code null} |
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* for an unbound socket. |
210 |
* |
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* @exception SocketException if the socket could not be opened, |
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* or the socket could not bind to the specified local port. |
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* @exception SecurityException if a security manager exists and its |
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* {@code checkListen} method doesn't allow the operation. |
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* |
216 |
* @see SecurityManager#checkListen |
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* @since 1.4 |
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*/ |
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public DatagramSocket(SocketAddress bindaddr) throws SocketException { |
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// create a datagram socket. |
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createImpl(); |
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if (bindaddr != null) { |
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try { |
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bind(bindaddr); |
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} finally { |
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if (!isBound()) |
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close(); |
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} |
2 | 229 |
} |
230 |
} |
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||
232 |
/** |
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233 |
* Constructs a datagram socket and binds it to the specified port |
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* on the local host machine. The socket will be bound to the |
|
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* {@link InetAddress#isAnyLocalAddress wildcard} address, |
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* an IP address chosen by the kernel. |
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* |
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* <p>If there is a security manager, |
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* its {@code checkListen} method is first called |
240 |
* with the {@code port} argument |
|
2 | 241 |
* as its argument to ensure the operation is allowed. |
242 |
* This could result in a SecurityException. |
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243 |
* |
|
244 |
* @param port port to use. |
|
245 |
* @exception SocketException if the socket could not be opened, |
|
246 |
* or the socket could not bind to the specified local port. |
|
247 |
* @exception SecurityException if a security manager exists and its |
|
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* {@code checkListen} method doesn't allow the operation. |
2 | 249 |
* |
250 |
* @see SecurityManager#checkListen |
|
251 |
*/ |
|
252 |
public DatagramSocket(int port) throws SocketException { |
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253 |
this(port, null); |
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254 |
} |
|
255 |
||
256 |
/** |
|
257 |
* Creates a datagram socket, bound to the specified local |
|
258 |
* address. The local port must be between 0 and 65535 inclusive. |
|
259 |
* If the IP address is 0.0.0.0, the socket will be bound to the |
|
260 |
* {@link InetAddress#isAnyLocalAddress wildcard} address, |
|
261 |
* an IP address chosen by the kernel. |
|
262 |
* |
|
263 |
* <p>If there is a security manager, |
|
19069 | 264 |
* its {@code checkListen} method is first called |
265 |
* with the {@code port} argument |
|
2 | 266 |
* as its argument to ensure the operation is allowed. |
267 |
* This could result in a SecurityException. |
|
268 |
* |
|
269 |
* @param port local port to use |
|
270 |
* @param laddr local address to bind |
|
271 |
* |
|
272 |
* @exception SocketException if the socket could not be opened, |
|
273 |
* or the socket could not bind to the specified local port. |
|
274 |
* @exception SecurityException if a security manager exists and its |
|
19069 | 275 |
* {@code checkListen} method doesn't allow the operation. |
2 | 276 |
* |
277 |
* @see SecurityManager#checkListen |
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* @since 1.1 |
2 | 279 |
*/ |
280 |
public DatagramSocket(int port, InetAddress laddr) throws SocketException { |
|
281 |
this(new InetSocketAddress(laddr, port)); |
|
282 |
} |
|
283 |
||
284 |
private void checkOldImpl() { |
|
285 |
if (impl == null) |
|
286 |
return; |
|
287 |
// DatagramSocketImpl.peekdata() is a protected method, therefore we need to use |
|
288 |
// getDeclaredMethod, therefore we need permission to access the member |
|
289 |
try { |
|
51 | 290 |
AccessController.doPrivileged( |
291 |
new PrivilegedExceptionAction<Void>() { |
|
292 |
public Void run() throws NoSuchMethodException { |
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293 |
Class<?>[] cl = new Class<?>[1]; |
2 | 294 |
cl[0] = DatagramPacket.class; |
295 |
impl.getClass().getDeclaredMethod("peekData", cl); |
|
296 |
return null; |
|
297 |
} |
|
298 |
}); |
|
299 |
} catch (java.security.PrivilegedActionException e) { |
|
300 |
oldImpl = true; |
|
301 |
} |
|
302 |
} |
|
303 |
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304 |
static Class<?> implClass = null; |
2 | 305 |
|
306 |
void createImpl() throws SocketException { |
|
307 |
if (impl == null) { |
|
308 |
if (factory != null) { |
|
309 |
impl = factory.createDatagramSocketImpl(); |
|
310 |
checkOldImpl(); |
|
311 |
} else { |
|
312 |
boolean isMulticast = (this instanceof MulticastSocket) ? true : false; |
|
313 |
impl = DefaultDatagramSocketImplFactory.createDatagramSocketImpl(isMulticast); |
|
314 |
||
315 |
checkOldImpl(); |
|
316 |
} |
|
317 |
} |
|
318 |
// creates a udp socket |
|
319 |
impl.create(); |
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320 |
impl.setDatagramSocket(this); |
2 | 321 |
created = true; |
322 |
} |
|
323 |
||
324 |
/** |
|
19069 | 325 |
* Get the {@code DatagramSocketImpl} attached to this socket, |
2 | 326 |
* creating it if necessary. |
327 |
* |
|
19069 | 328 |
* @return the {@code DatagramSocketImpl} attached to that |
2 | 329 |
* DatagramSocket |
330 |
* @throws SocketException if creation fails. |
|
331 |
* @since 1.4 |
|
332 |
*/ |
|
333 |
DatagramSocketImpl getImpl() throws SocketException { |
|
334 |
if (!created) |
|
335 |
createImpl(); |
|
336 |
return impl; |
|
337 |
} |
|
338 |
||
339 |
/** |
|
18156 | 340 |
* Binds this DatagramSocket to a specific address and port. |
2 | 341 |
* <p> |
19069 | 342 |
* If the address is {@code null}, then the system will pick up |
2 | 343 |
* an ephemeral port and a valid local address to bind the socket. |
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344 |
* |
18156 | 345 |
* @param addr The address and port to bind to. |
2 | 346 |
* @throws SocketException if any error happens during the bind, or if the |
347 |
* socket is already bound. |
|
348 |
* @throws SecurityException if a security manager exists and its |
|
19069 | 349 |
* {@code checkListen} method doesn't allow the operation. |
2 | 350 |
* @throws IllegalArgumentException if addr is a SocketAddress subclass |
351 |
* not supported by this socket. |
|
352 |
* @since 1.4 |
|
353 |
*/ |
|
354 |
public synchronized void bind(SocketAddress addr) throws SocketException { |
|
355 |
if (isClosed()) |
|
356 |
throw new SocketException("Socket is closed"); |
|
357 |
if (isBound()) |
|
358 |
throw new SocketException("already bound"); |
|
359 |
if (addr == null) |
|
360 |
addr = new InetSocketAddress(0); |
|
361 |
if (!(addr instanceof InetSocketAddress)) |
|
362 |
throw new IllegalArgumentException("Unsupported address type!"); |
|
363 |
InetSocketAddress epoint = (InetSocketAddress) addr; |
|
364 |
if (epoint.isUnresolved()) |
|
365 |
throw new SocketException("Unresolved address"); |
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InetAddress iaddr = epoint.getAddress(); |
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367 |
int port = epoint.getPort(); |
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|
368 |
checkAddress(iaddr, "bind"); |
2 | 369 |
SecurityManager sec = System.getSecurityManager(); |
370 |
if (sec != null) { |
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|
371 |
sec.checkListen(port); |
2 | 372 |
} |
373 |
try { |
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|
374 |
getImpl().bind(port, iaddr); |
2 | 375 |
} catch (SocketException e) { |
376 |
getImpl().close(); |
|
377 |
throw e; |
|
378 |
} |
|
379 |
bound = true; |
|
380 |
} |
|
381 |
||
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382 |
void checkAddress (InetAddress addr, String op) { |
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|
383 |
if (addr == null) { |
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|
384 |
return; |
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diff
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|
385 |
} |
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diff
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|
386 |
if (!(addr instanceof Inet4Address || addr instanceof Inet6Address)) { |
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|
387 |
throw new IllegalArgumentException(op + ": invalid address type"); |
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|
388 |
} |
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|
389 |
} |
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|
390 |
|
2 | 391 |
/** |
392 |
* Connects the socket to a remote address for this socket. When a |
|
393 |
* socket is connected to a remote address, packets may only be |
|
394 |
* sent to or received from that address. By default a datagram |
|
395 |
* socket is not connected. |
|
396 |
* |
|
397 |
* <p>If the remote destination to which the socket is connected does not |
|
398 |
* exist, or is otherwise unreachable, and if an ICMP destination unreachable |
|
399 |
* packet has been received for that address, then a subsequent call to |
|
400 |
* send or receive may throw a PortUnreachableException. Note, there is no |
|
401 |
* guarantee that the exception will be thrown. |
|
402 |
* |
|
5465
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|
403 |
* <p> If a security manager has been installed then it is invoked to check |
950789cfc3c5
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|
404 |
* access to the remote address. Specifically, if the given {@code address} |
950789cfc3c5
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|
405 |
* is a {@link InetAddress#isMulticastAddress multicast address}, |
950789cfc3c5
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diff
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|
406 |
* the security manager's {@link |
950789cfc3c5
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diff
changeset
|
407 |
* java.lang.SecurityManager#checkMulticast(InetAddress) |
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|
408 |
* checkMulticast} method is invoked with the given {@code address}. |
950789cfc3c5
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diff
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|
409 |
* Otherwise, the security manager's {@link |
950789cfc3c5
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diff
changeset
|
410 |
* java.lang.SecurityManager#checkConnect(String,int) checkConnect} |
950789cfc3c5
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|
411 |
* and {@link java.lang.SecurityManager#checkAccept checkAccept} methods |
950789cfc3c5
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diff
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|
412 |
* are invoked, with the given {@code address} and {@code port}, to |
950789cfc3c5
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diff
changeset
|
413 |
* verify that datagrams are permitted to be sent and received |
950789cfc3c5
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diff
changeset
|
414 |
* respectively. |
950789cfc3c5
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parents:
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diff
changeset
|
415 |
* |
950789cfc3c5
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diff
changeset
|
416 |
* <p> When a socket is connected, {@link #receive receive} and |
950789cfc3c5
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diff
changeset
|
417 |
* {@link #send send} <b>will not perform any security checks</b> |
950789cfc3c5
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diff
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|
418 |
* on incoming and outgoing packets, other than matching the packet's |
950789cfc3c5
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diff
changeset
|
419 |
* and the socket's address and port. On a send operation, if the |
950789cfc3c5
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diff
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|
420 |
* packet's address is set and the packet's address and the socket's |
950789cfc3c5
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diff
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|
421 |
* address do not match, an {@code IllegalArgumentException} will be |
950789cfc3c5
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diff
changeset
|
422 |
* thrown. A socket connected to a multicast address may only be used |
950789cfc3c5
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diff
changeset
|
423 |
* to send packets. |
2 | 424 |
* |
425 |
* @param address the remote address for the socket |
|
426 |
* |
|
427 |
* @param port the remote port for the socket. |
|
428 |
* |
|
5465
950789cfc3c5
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|
429 |
* @throws IllegalArgumentException |
950789cfc3c5
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diff
changeset
|
430 |
* if the address is null, or the port is out of range. |
2 | 431 |
* |
5465
950789cfc3c5
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diff
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|
432 |
* @throws SecurityException |
950789cfc3c5
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diff
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|
433 |
* if a security manager has been installed and it does |
950789cfc3c5
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diff
changeset
|
434 |
* not permit access to the given remote address |
2 | 435 |
* |
436 |
* @see #disconnect |
|
437 |
*/ |
|
438 |
public void connect(InetAddress address, int port) { |
|
439 |
try { |
|
440 |
connectInternal(address, port); |
|
441 |
} catch (SocketException se) { |
|
442 |
throw new Error("connect failed", se); |
|
443 |
} |
|
444 |
} |
|
445 |
||
446 |
/** |
|
447 |
* Connects this socket to a remote socket address (IP address + port number). |
|
5465
950789cfc3c5
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diff
changeset
|
448 |
* |
950789cfc3c5
6946673: DatagramSocket.connect() documentation contradicts the implementation
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diff
changeset
|
449 |
* <p> If given an {@link InetSocketAddress InetSocketAddress}, this method |
950789cfc3c5
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diff
changeset
|
450 |
* behaves as if invoking {@link #connect(InetAddress,int) connect(InetAddress,int)} |
23927 | 451 |
* with the given socket addresses IP address and port number. |
5465
950789cfc3c5
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|
452 |
* |
2 | 453 |
* @param addr The remote address. |
5465
950789cfc3c5
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diff
changeset
|
454 |
* |
950789cfc3c5
6946673: DatagramSocket.connect() documentation contradicts the implementation
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parents:
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diff
changeset
|
455 |
* @throws SocketException |
950789cfc3c5
6946673: DatagramSocket.connect() documentation contradicts the implementation
chegar
parents:
5180
diff
changeset
|
456 |
* if the connect fails |
950789cfc3c5
6946673: DatagramSocket.connect() documentation contradicts the implementation
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parents:
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diff
changeset
|
457 |
* |
950789cfc3c5
6946673: DatagramSocket.connect() documentation contradicts the implementation
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parents:
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diff
changeset
|
458 |
* @throws IllegalArgumentException |
950789cfc3c5
6946673: DatagramSocket.connect() documentation contradicts the implementation
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diff
changeset
|
459 |
* if {@code addr} is {@code null}, or {@code addr} is a SocketAddress |
950789cfc3c5
6946673: DatagramSocket.connect() documentation contradicts the implementation
chegar
parents:
5180
diff
changeset
|
460 |
* subclass not supported by this socket |
950789cfc3c5
6946673: DatagramSocket.connect() documentation contradicts the implementation
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parents:
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diff
changeset
|
461 |
* |
950789cfc3c5
6946673: DatagramSocket.connect() documentation contradicts the implementation
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diff
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|
462 |
* @throws SecurityException |
950789cfc3c5
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|
463 |
* if a security manager has been installed and it does |
950789cfc3c5
6946673: DatagramSocket.connect() documentation contradicts the implementation
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diff
changeset
|
464 |
* not permit access to the given remote address |
950789cfc3c5
6946673: DatagramSocket.connect() documentation contradicts the implementation
chegar
parents:
5180
diff
changeset
|
465 |
* |
2 | 466 |
* @since 1.4 |
467 |
*/ |
|
468 |
public void connect(SocketAddress addr) throws SocketException { |
|
469 |
if (addr == null) |
|
470 |
throw new IllegalArgumentException("Address can't be null"); |
|
471 |
if (!(addr instanceof InetSocketAddress)) |
|
472 |
throw new IllegalArgumentException("Unsupported address type"); |
|
473 |
InetSocketAddress epoint = (InetSocketAddress) addr; |
|
474 |
if (epoint.isUnresolved()) |
|
475 |
throw new SocketException("Unresolved address"); |
|
476 |
connectInternal(epoint.getAddress(), epoint.getPort()); |
|
477 |
} |
|
478 |
||
479 |
/** |
|
480 |
* Disconnects the socket. If the socket is closed or not connected, |
|
481 |
* then this method has no effect. |
|
482 |
* |
|
483 |
* @see #connect |
|
484 |
*/ |
|
485 |
public void disconnect() { |
|
486 |
synchronized (this) { |
|
487 |
if (isClosed()) |
|
488 |
return; |
|
489 |
if (connectState == ST_CONNECTED) { |
|
490 |
impl.disconnect (); |
|
491 |
} |
|
492 |
connectedAddress = null; |
|
493 |
connectedPort = -1; |
|
494 |
connectState = ST_NOT_CONNECTED; |
|
495 |
} |
|
496 |
} |
|
497 |
||
498 |
/** |
|
499 |
* Returns the binding state of the socket. |
|
500 |
* <p> |
|
501 |
* If the socket was bound prior to being {@link #close closed}, |
|
19069 | 502 |
* then this method will continue to return {@code true} |
2 | 503 |
* after the socket is closed. |
504 |
* |
|
505 |
* @return true if the socket successfully bound to an address |
|
506 |
* @since 1.4 |
|
507 |
*/ |
|
508 |
public boolean isBound() { |
|
509 |
return bound; |
|
510 |
} |
|
511 |
||
512 |
/** |
|
513 |
* Returns the connection state of the socket. |
|
514 |
* <p> |
|
515 |
* If the socket was connected prior to being {@link #close closed}, |
|
19069 | 516 |
* then this method will continue to return {@code true} |
2 | 517 |
* after the socket is closed. |
518 |
* |
|
519 |
* @return true if the socket successfully connected to a server |
|
520 |
* @since 1.4 |
|
521 |
*/ |
|
522 |
public boolean isConnected() { |
|
523 |
return connectState != ST_NOT_CONNECTED; |
|
524 |
} |
|
525 |
||
526 |
/** |
|
527 |
* Returns the address to which this socket is connected. Returns |
|
19069 | 528 |
* {@code null} if the socket is not connected. |
2 | 529 |
* <p> |
530 |
* If the socket was connected prior to being {@link #close closed}, |
|
531 |
* then this method will continue to return the connected address |
|
532 |
* after the socket is closed. |
|
533 |
* |
|
534 |
* @return the address to which this socket is connected. |
|
535 |
*/ |
|
536 |
public InetAddress getInetAddress() { |
|
537 |
return connectedAddress; |
|
538 |
} |
|
539 |
||
540 |
/** |
|
541 |
* Returns the port number to which this socket is connected. |
|
19069 | 542 |
* Returns {@code -1} if the socket is not connected. |
2 | 543 |
* <p> |
544 |
* If the socket was connected prior to being {@link #close closed}, |
|
545 |
* then this method will continue to return the connected port number |
|
546 |
* after the socket is closed. |
|
547 |
* |
|
548 |
* @return the port number to which this socket is connected. |
|
549 |
*/ |
|
550 |
public int getPort() { |
|
551 |
return connectedPort; |
|
552 |
} |
|
553 |
||
554 |
/** |
|
555 |
* Returns the address of the endpoint this socket is connected to, or |
|
19069 | 556 |
* {@code null} if it is unconnected. |
2 | 557 |
* <p> |
558 |
* If the socket was connected prior to being {@link #close closed}, |
|
559 |
* then this method will continue to return the connected address |
|
560 |
* after the socket is closed. |
|
561 |
* |
|
19069 | 562 |
* @return a {@code SocketAddress} representing the remote |
563 |
* endpoint of this socket, or {@code null} if it is |
|
2 | 564 |
* not connected yet. |
565 |
* @see #getInetAddress() |
|
566 |
* @see #getPort() |
|
567 |
* @see #connect(SocketAddress) |
|
568 |
* @since 1.4 |
|
569 |
*/ |
|
570 |
public SocketAddress getRemoteSocketAddress() { |
|
571 |
if (!isConnected()) |
|
572 |
return null; |
|
573 |
return new InetSocketAddress(getInetAddress(), getPort()); |
|
574 |
} |
|
575 |
||
576 |
/** |
|
577 |
* Returns the address of the endpoint this socket is bound to. |
|
578 |
* |
|
19069 | 579 |
* @return a {@code SocketAddress} representing the local endpoint of this |
580 |
* socket, or {@code null} if it is closed or not bound yet. |
|
2 | 581 |
* @see #getLocalAddress() |
582 |
* @see #getLocalPort() |
|
583 |
* @see #bind(SocketAddress) |
|
584 |
* @since 1.4 |
|
585 |
*/ |
|
586 |
||
587 |
public SocketAddress getLocalSocketAddress() { |
|
588 |
if (isClosed()) |
|
589 |
return null; |
|
590 |
if (!isBound()) |
|
591 |
return null; |
|
592 |
return new InetSocketAddress(getLocalAddress(), getLocalPort()); |
|
593 |
} |
|
594 |
||
595 |
/** |
|
596 |
* Sends a datagram packet from this socket. The |
|
19069 | 597 |
* {@code DatagramPacket} includes information indicating the |
2 | 598 |
* data to be sent, its length, the IP address of the remote host, |
599 |
* and the port number on the remote host. |
|
600 |
* |
|
601 |
* <p>If there is a security manager, and the socket is not currently |
|
602 |
* connected to a remote address, this method first performs some |
|
19069 | 603 |
* security checks. First, if {@code p.getAddress().isMulticastAddress()} |
2 | 604 |
* is true, this method calls the |
19069 | 605 |
* security manager's {@code checkMulticast} method |
606 |
* with {@code p.getAddress()} as its argument. |
|
2 | 607 |
* If the evaluation of that expression is false, |
608 |
* this method instead calls the security manager's |
|
19069 | 609 |
* {@code checkConnect} method with arguments |
610 |
* {@code p.getAddress().getHostAddress()} and |
|
611 |
* {@code p.getPort()}. Each call to a security manager method |
|
2 | 612 |
* could result in a SecurityException if the operation is not allowed. |
613 |
* |
|
19069 | 614 |
* @param p the {@code DatagramPacket} to be sent. |
2 | 615 |
* |
616 |
* @exception IOException if an I/O error occurs. |
|
617 |
* @exception SecurityException if a security manager exists and its |
|
19069 | 618 |
* {@code checkMulticast} or {@code checkConnect} |
2 | 619 |
* method doesn't allow the send. |
620 |
* @exception PortUnreachableException may be thrown if the socket is connected |
|
621 |
* to a currently unreachable destination. Note, there is no |
|
622 |
* guarantee that the exception will be thrown. |
|
623 |
* @exception java.nio.channels.IllegalBlockingModeException |
|
624 |
* if this socket has an associated channel, |
|
625 |
* and the channel is in non-blocking mode. |
|
626 |
* @exception IllegalArgumentException if the socket is connected, |
|
627 |
* and connected address and packet address differ. |
|
628 |
* |
|
629 |
* @see java.net.DatagramPacket |
|
630 |
* @see SecurityManager#checkMulticast(InetAddress) |
|
631 |
* @see SecurityManager#checkConnect |
|
632 |
* @revised 1.4 |
|
633 |
* @spec JSR-51 |
|
634 |
*/ |
|
635 |
public void send(DatagramPacket p) throws IOException { |
|
636 |
InetAddress packetAddress = null; |
|
637 |
synchronized (p) { |
|
638 |
if (isClosed()) |
|
639 |
throw new SocketException("Socket is closed"); |
|
5180
8161f879d704
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michaelm
parents:
1817
diff
changeset
|
640 |
checkAddress (p.getAddress(), "send"); |
2 | 641 |
if (connectState == ST_NOT_CONNECTED) { |
642 |
// check the address is ok wiht the security manager on every send. |
|
643 |
SecurityManager security = System.getSecurityManager(); |
|
644 |
||
645 |
// The reason you want to synchronize on datagram packet |
|
21278 | 646 |
// is because you don't want an applet to change the address |
2 | 647 |
// while you are trying to send the packet for example |
648 |
// after the security check but before the send. |
|
649 |
if (security != null) { |
|
650 |
if (p.getAddress().isMulticastAddress()) { |
|
651 |
security.checkMulticast(p.getAddress()); |
|
652 |
} else { |
|
653 |
security.checkConnect(p.getAddress().getHostAddress(), |
|
654 |
p.getPort()); |
|
655 |
} |
|
656 |
} |
|
657 |
} else { |
|
658 |
// we're connected |
|
659 |
packetAddress = p.getAddress(); |
|
660 |
if (packetAddress == null) { |
|
661 |
p.setAddress(connectedAddress); |
|
662 |
p.setPort(connectedPort); |
|
663 |
} else if ((!packetAddress.equals(connectedAddress)) || |
|
664 |
p.getPort() != connectedPort) { |
|
665 |
throw new IllegalArgumentException("connected address " + |
|
666 |
"and packet address" + |
|
667 |
" differ"); |
|
668 |
} |
|
669 |
} |
|
670 |
// Check whether the socket is bound |
|
671 |
if (!isBound()) |
|
672 |
bind(new InetSocketAddress(0)); |
|
673 |
// call the method to send |
|
674 |
getImpl().send(p); |
|
675 |
} |
|
676 |
} |
|
677 |
||
678 |
/** |
|
679 |
* Receives a datagram packet from this socket. When this method |
|
19069 | 680 |
* returns, the {@code DatagramPacket}'s buffer is filled with |
2 | 681 |
* the data received. The datagram packet also contains the sender's |
682 |
* IP address, and the port number on the sender's machine. |
|
683 |
* <p> |
|
684 |
* This method blocks until a datagram is received. The |
|
19069 | 685 |
* {@code length} field of the datagram packet object contains |
2 | 686 |
* the length of the received message. If the message is longer than |
687 |
* the packet's length, the message is truncated. |
|
688 |
* <p> |
|
689 |
* If there is a security manager, a packet cannot be received if the |
|
19069 | 690 |
* security manager's {@code checkAccept} method |
2 | 691 |
* does not allow it. |
692 |
* |
|
19069 | 693 |
* @param p the {@code DatagramPacket} into which to place |
2 | 694 |
* the incoming data. |
695 |
* @exception IOException if an I/O error occurs. |
|
696 |
* @exception SocketTimeoutException if setSoTimeout was previously called |
|
697 |
* and the timeout has expired. |
|
698 |
* @exception PortUnreachableException may be thrown if the socket is connected |
|
699 |
* to a currently unreachable destination. Note, there is no guarantee that the |
|
700 |
* exception will be thrown. |
|
701 |
* @exception java.nio.channels.IllegalBlockingModeException |
|
702 |
* if this socket has an associated channel, |
|
703 |
* and the channel is in non-blocking mode. |
|
704 |
* @see java.net.DatagramPacket |
|
705 |
* @see java.net.DatagramSocket |
|
706 |
* @revised 1.4 |
|
707 |
* @spec JSR-51 |
|
708 |
*/ |
|
709 |
public synchronized void receive(DatagramPacket p) throws IOException { |
|
710 |
synchronized (p) { |
|
711 |
if (!isBound()) |
|
712 |
bind(new InetSocketAddress(0)); |
|
713 |
if (connectState == ST_NOT_CONNECTED) { |
|
714 |
// check the address is ok with the security manager before every recv. |
|
715 |
SecurityManager security = System.getSecurityManager(); |
|
716 |
if (security != null) { |
|
717 |
while(true) { |
|
718 |
String peekAd = null; |
|
719 |
int peekPort = 0; |
|
720 |
// peek at the packet to see who it is from. |
|
721 |
if (!oldImpl) { |
|
722 |
// We can use the new peekData() API |
|
723 |
DatagramPacket peekPacket = new DatagramPacket(new byte[1], 1); |
|
724 |
peekPort = getImpl().peekData(peekPacket); |
|
725 |
peekAd = peekPacket.getAddress().getHostAddress(); |
|
726 |
} else { |
|
727 |
InetAddress adr = new InetAddress(); |
|
728 |
peekPort = getImpl().peek(adr); |
|
729 |
peekAd = adr.getHostAddress(); |
|
730 |
} |
|
731 |
try { |
|
732 |
security.checkAccept(peekAd, peekPort); |
|
733 |
// security check succeeded - so now break |
|
734 |
// and recv the packet. |
|
735 |
break; |
|
736 |
} catch (SecurityException se) { |
|
737 |
// Throw away the offending packet by consuming |
|
738 |
// it in a tmp buffer. |
|
739 |
DatagramPacket tmp = new DatagramPacket(new byte[1], 1); |
|
740 |
getImpl().receive(tmp); |
|
741 |
||
742 |
// silently discard the offending packet |
|
743 |
// and continue: unknown/malicious |
|
744 |
// entities on nets should not make |
|
745 |
// runtime throw security exception and |
|
746 |
// disrupt the applet by sending random |
|
747 |
// datagram packets. |
|
748 |
continue; |
|
749 |
} |
|
750 |
} // end of while |
|
751 |
} |
|
752 |
} |
|
753 |
if (connectState == ST_CONNECTED_NO_IMPL) { |
|
754 |
// We have to do the filtering the old fashioned way since |
|
755 |
// the native impl doesn't support connect or the connect |
|
756 |
// via the impl failed. |
|
757 |
boolean stop = false; |
|
758 |
while (!stop) { |
|
12047
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
759 |
InetAddress peekAddress = null; |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
760 |
int peekPort = -1; |
2 | 761 |
// peek at the packet to see who it is from. |
12047
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
762 |
if (!oldImpl) { |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
763 |
// We can use the new peekData() API |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
764 |
DatagramPacket peekPacket = new DatagramPacket(new byte[1], 1); |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
765 |
peekPort = getImpl().peekData(peekPacket); |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
766 |
peekAddress = peekPacket.getAddress(); |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
767 |
} else { |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
768 |
// this api only works for IPv4 |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
769 |
peekAddress = new InetAddress(); |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
770 |
peekPort = getImpl().peek(peekAddress); |
320a714614e9
7113349: Initial changeset for Macosx port to jdk
michaelm
parents:
10701
diff
changeset
|
771 |
} |
2 | 772 |
if ((!connectedAddress.equals(peekAddress)) || |
773 |
(connectedPort != peekPort)) { |
|
774 |
// throw the packet away and silently continue |
|
775 |
DatagramPacket tmp = new DatagramPacket(new byte[1], 1); |
|
776 |
getImpl().receive(tmp); |
|
777 |
} else { |
|
778 |
stop = true; |
|
779 |
} |
|
780 |
} |
|
781 |
} |
|
782 |
// If the security check succeeds, or the datagram is |
|
783 |
// connected then receive the packet |
|
784 |
getImpl().receive(p); |
|
785 |
} |
|
786 |
} |
|
787 |
||
788 |
/** |
|
789 |
* Gets the local address to which the socket is bound. |
|
790 |
* |
|
791 |
* <p>If there is a security manager, its |
|
19069 | 792 |
* {@code checkConnect} method is first called |
793 |
* with the host address and {@code -1} |
|
2 | 794 |
* as its arguments to see if the operation is allowed. |
795 |
* |
|
796 |
* @see SecurityManager#checkConnect |
|
797 |
* @return the local address to which the socket is bound, |
|
19069 | 798 |
* {@code null} if the socket is closed, or |
799 |
* an {@code InetAddress} representing |
|
2 | 800 |
* {@link InetAddress#isAnyLocalAddress wildcard} |
801 |
* address if either the socket is not bound, or |
|
19069 | 802 |
* the security manager {@code checkConnect} |
2 | 803 |
* method does not allow the operation |
804 |
* @since 1.1 |
|
805 |
*/ |
|
806 |
public InetAddress getLocalAddress() { |
|
807 |
if (isClosed()) |
|
808 |
return null; |
|
809 |
InetAddress in = null; |
|
810 |
try { |
|
811 |
in = (InetAddress) getImpl().getOption(SocketOptions.SO_BINDADDR); |
|
812 |
if (in.isAnyLocalAddress()) { |
|
813 |
in = InetAddress.anyLocalAddress(); |
|
814 |
} |
|
815 |
SecurityManager s = System.getSecurityManager(); |
|
816 |
if (s != null) { |
|
817 |
s.checkConnect(in.getHostAddress(), -1); |
|
818 |
} |
|
819 |
} catch (Exception e) { |
|
820 |
in = InetAddress.anyLocalAddress(); // "0.0.0.0" |
|
821 |
} |
|
822 |
return in; |
|
823 |
} |
|
824 |
||
825 |
/** |
|
826 |
* Returns the port number on the local host to which this socket |
|
827 |
* is bound. |
|
828 |
* |
|
829 |
* @return the port number on the local host to which this socket is bound, |
|
19069 | 830 |
{@code -1} if the socket is closed, or |
831 |
{@code 0} if it is not bound yet. |
|
2 | 832 |
*/ |
833 |
public int getLocalPort() { |
|
834 |
if (isClosed()) |
|
835 |
return -1; |
|
836 |
try { |
|
837 |
return getImpl().getLocalPort(); |
|
838 |
} catch (Exception e) { |
|
839 |
return 0; |
|
840 |
} |
|
841 |
} |
|
842 |
||
843 |
/** Enable/disable SO_TIMEOUT with the specified timeout, in |
|
844 |
* milliseconds. With this option set to a non-zero timeout, |
|
845 |
* a call to receive() for this DatagramSocket |
|
846 |
* will block for only this amount of time. If the timeout expires, |
|
847 |
* a <B>java.net.SocketTimeoutException</B> is raised, though the |
|
848 |
* DatagramSocket is still valid. The option <B>must</B> be enabled |
|
849 |
* prior to entering the blocking operation to have effect. The |
|
18156 | 850 |
* timeout must be {@code > 0}. |
2 | 851 |
* A timeout of zero is interpreted as an infinite timeout. |
852 |
* |
|
853 |
* @param timeout the specified timeout in milliseconds. |
|
854 |
* @throws SocketException if there is an error in the underlying protocol, such as an UDP error. |
|
24865
09b1d992ca72
8044740: Convert all JDK versions used in @since tag to 1.n[.n] in jdk repo
henryjen
parents:
23927
diff
changeset
|
855 |
* @since 1.1 |
2 | 856 |
* @see #getSoTimeout() |
857 |
*/ |
|
858 |
public synchronized void setSoTimeout(int timeout) throws SocketException { |
|
859 |
if (isClosed()) |
|
860 |
throw new SocketException("Socket is closed"); |
|
861 |
getImpl().setOption(SocketOptions.SO_TIMEOUT, new Integer(timeout)); |
|
862 |
} |
|
863 |
||
864 |
/** |
|
865 |
* Retrieve setting for SO_TIMEOUT. 0 returns implies that the |
|
866 |
* option is disabled (i.e., timeout of infinity). |
|
867 |
* |
|
868 |
* @return the setting for SO_TIMEOUT |
|
869 |
* @throws SocketException if there is an error in the underlying protocol, such as an UDP error. |
|
24865
09b1d992ca72
8044740: Convert all JDK versions used in @since tag to 1.n[.n] in jdk repo
henryjen
parents:
23927
diff
changeset
|
870 |
* @since 1.1 |
2 | 871 |
* @see #setSoTimeout(int) |
872 |
*/ |
|
873 |
public synchronized int getSoTimeout() throws SocketException { |
|
874 |
if (isClosed()) |
|
875 |
throw new SocketException("Socket is closed"); |
|
876 |
if (getImpl() == null) |
|
877 |
return 0; |
|
878 |
Object o = getImpl().getOption(SocketOptions.SO_TIMEOUT); |
|
879 |
/* extra type safety */ |
|
880 |
if (o instanceof Integer) { |
|
881 |
return ((Integer) o).intValue(); |
|
882 |
} else { |
|
883 |
return 0; |
|
884 |
} |
|
885 |
} |
|
886 |
||
887 |
/** |
|
888 |
* Sets the SO_SNDBUF option to the specified value for this |
|
19069 | 889 |
* {@code DatagramSocket}. The SO_SNDBUF option is used by the |
2 | 890 |
* network implementation as a hint to size the underlying |
891 |
* network I/O buffers. The SO_SNDBUF setting may also be used |
|
892 |
* by the network implementation to determine the maximum size |
|
893 |
* of the packet that can be sent on this socket. |
|
894 |
* <p> |
|
895 |
* As SO_SNDBUF is a hint, applications that want to verify |
|
896 |
* what size the buffer is should call {@link #getSendBufferSize()}. |
|
897 |
* <p> |
|
898 |
* Increasing the buffer size may allow multiple outgoing packets |
|
899 |
* to be queued by the network implementation when the send rate |
|
900 |
* is high. |
|
901 |
* <p> |
|
902 |
* Note: If {@link #send(DatagramPacket)} is used to send a |
|
19069 | 903 |
* {@code DatagramPacket} that is larger than the setting |
2 | 904 |
* of SO_SNDBUF then it is implementation specific if the |
905 |
* packet is sent or discarded. |
|
906 |
* |
|
907 |
* @param size the size to which to set the send buffer |
|
908 |
* size. This value must be greater than 0. |
|
909 |
* |
|
910 |
* @exception SocketException if there is an error |
|
911 |
* in the underlying protocol, such as an UDP error. |
|
912 |
* @exception IllegalArgumentException if the value is 0 or is |
|
913 |
* negative. |
|
914 |
* @see #getSendBufferSize() |
|
915 |
*/ |
|
916 |
public synchronized void setSendBufferSize(int size) |
|
917 |
throws SocketException{ |
|
918 |
if (!(size > 0)) { |
|
919 |
throw new IllegalArgumentException("negative send size"); |
|
920 |
} |
|
921 |
if (isClosed()) |
|
922 |
throw new SocketException("Socket is closed"); |
|
923 |
getImpl().setOption(SocketOptions.SO_SNDBUF, new Integer(size)); |
|
924 |
} |
|
925 |
||
926 |
/** |
|
19069 | 927 |
* Get value of the SO_SNDBUF option for this {@code DatagramSocket}, that is the |
928 |
* buffer size used by the platform for output on this {@code DatagramSocket}. |
|
2 | 929 |
* |
19069 | 930 |
* @return the value of the SO_SNDBUF option for this {@code DatagramSocket} |
2 | 931 |
* @exception SocketException if there is an error in |
932 |
* the underlying protocol, such as an UDP error. |
|
933 |
* @see #setSendBufferSize |
|
934 |
*/ |
|
935 |
public synchronized int getSendBufferSize() throws SocketException { |
|
936 |
if (isClosed()) |
|
937 |
throw new SocketException("Socket is closed"); |
|
938 |
int result = 0; |
|
939 |
Object o = getImpl().getOption(SocketOptions.SO_SNDBUF); |
|
940 |
if (o instanceof Integer) { |
|
941 |
result = ((Integer)o).intValue(); |
|
942 |
} |
|
943 |
return result; |
|
944 |
} |
|
945 |
||
946 |
/** |
|
947 |
* Sets the SO_RCVBUF option to the specified value for this |
|
19069 | 948 |
* {@code DatagramSocket}. The SO_RCVBUF option is used by the |
2 | 949 |
* the network implementation as a hint to size the underlying |
950 |
* network I/O buffers. The SO_RCVBUF setting may also be used |
|
951 |
* by the network implementation to determine the maximum size |
|
952 |
* of the packet that can be received on this socket. |
|
953 |
* <p> |
|
954 |
* Because SO_RCVBUF is a hint, applications that want to |
|
955 |
* verify what size the buffers were set to should call |
|
956 |
* {@link #getReceiveBufferSize()}. |
|
957 |
* <p> |
|
958 |
* Increasing SO_RCVBUF may allow the network implementation |
|
959 |
* to buffer multiple packets when packets arrive faster than |
|
960 |
* are being received using {@link #receive(DatagramPacket)}. |
|
961 |
* <p> |
|
962 |
* Note: It is implementation specific if a packet larger |
|
963 |
* than SO_RCVBUF can be received. |
|
964 |
* |
|
965 |
* @param size the size to which to set the receive buffer |
|
966 |
* size. This value must be greater than 0. |
|
967 |
* |
|
968 |
* @exception SocketException if there is an error in |
|
969 |
* the underlying protocol, such as an UDP error. |
|
970 |
* @exception IllegalArgumentException if the value is 0 or is |
|
971 |
* negative. |
|
972 |
* @see #getReceiveBufferSize() |
|
973 |
*/ |
|
974 |
public synchronized void setReceiveBufferSize(int size) |
|
975 |
throws SocketException{ |
|
976 |
if (size <= 0) { |
|
977 |
throw new IllegalArgumentException("invalid receive size"); |
|
978 |
} |
|
979 |
if (isClosed()) |
|
980 |
throw new SocketException("Socket is closed"); |
|
981 |
getImpl().setOption(SocketOptions.SO_RCVBUF, new Integer(size)); |
|
982 |
} |
|
983 |
||
984 |
/** |
|
19069 | 985 |
* Get value of the SO_RCVBUF option for this {@code DatagramSocket}, that is the |
986 |
* buffer size used by the platform for input on this {@code DatagramSocket}. |
|
2 | 987 |
* |
19069 | 988 |
* @return the value of the SO_RCVBUF option for this {@code DatagramSocket} |
2 | 989 |
* @exception SocketException if there is an error in the underlying protocol, such as an UDP error. |
990 |
* @see #setReceiveBufferSize(int) |
|
991 |
*/ |
|
992 |
public synchronized int getReceiveBufferSize() |
|
993 |
throws SocketException{ |
|
994 |
if (isClosed()) |
|
995 |
throw new SocketException("Socket is closed"); |
|
996 |
int result = 0; |
|
997 |
Object o = getImpl().getOption(SocketOptions.SO_RCVBUF); |
|
998 |
if (o instanceof Integer) { |
|
999 |
result = ((Integer)o).intValue(); |
|
1000 |
} |
|
1001 |
return result; |
|
1002 |
} |
|
1003 |
||
1004 |
/** |
|
1005 |
* Enable/disable the SO_REUSEADDR socket option. |
|
1006 |
* <p> |
|
1007 |
* For UDP sockets it may be necessary to bind more than one |
|
1008 |
* socket to the same socket address. This is typically for the |
|
1009 |
* purpose of receiving multicast packets |
|
1010 |
* (See {@link java.net.MulticastSocket}). The |
|
19069 | 1011 |
* {@code SO_REUSEADDR} socket option allows multiple |
2 | 1012 |
* sockets to be bound to the same socket address if the |
19069 | 1013 |
* {@code SO_REUSEADDR} socket option is enabled prior |
2 | 1014 |
* to binding the socket using {@link #bind(SocketAddress)}. |
1015 |
* <p> |
|
1016 |
* Note: This functionality is not supported by all existing platforms, |
|
1017 |
* so it is implementation specific whether this option will be ignored |
|
1018 |
* or not. However, if it is not supported then |
|
19069 | 1019 |
* {@link #getReuseAddress()} will always return {@code false}. |
2 | 1020 |
* <p> |
19069 | 1021 |
* When a {@code DatagramSocket} is created the initial setting |
1022 |
* of {@code SO_REUSEADDR} is disabled. |
|
2 | 1023 |
* <p> |
19069 | 1024 |
* The behaviour when {@code SO_REUSEADDR} is enabled or |
2 | 1025 |
* disabled after a socket is bound (See {@link #isBound()}) |
1026 |
* is not defined. |
|
1027 |
* |
|
1028 |
* @param on whether to enable or disable the |
|
1029 |
* @exception SocketException if an error occurs enabling or |
|
19069 | 1030 |
* disabling the {@code SO_RESUEADDR} socket option, |
2 | 1031 |
* or the socket is closed. |
1032 |
* @since 1.4 |
|
1033 |
* @see #getReuseAddress() |
|
1034 |
* @see #bind(SocketAddress) |
|
1035 |
* @see #isBound() |
|
1036 |
* @see #isClosed() |
|
1037 |
*/ |
|
1038 |
public synchronized void setReuseAddress(boolean on) throws SocketException { |
|
1039 |
if (isClosed()) |
|
1040 |
throw new SocketException("Socket is closed"); |
|
1041 |
// Integer instead of Boolean for compatibility with older DatagramSocketImpl |
|
1042 |
if (oldImpl) |
|
1043 |
getImpl().setOption(SocketOptions.SO_REUSEADDR, new Integer(on?-1:0)); |
|
1044 |
else |
|
1045 |
getImpl().setOption(SocketOptions.SO_REUSEADDR, Boolean.valueOf(on)); |
|
1046 |
} |
|
1047 |
||
1048 |
/** |
|
1049 |
* Tests if SO_REUSEADDR is enabled. |
|
1050 |
* |
|
19069 | 1051 |
* @return a {@code boolean} indicating whether or not SO_REUSEADDR is enabled. |
2 | 1052 |
* @exception SocketException if there is an error |
1053 |
* in the underlying protocol, such as an UDP error. |
|
1054 |
* @since 1.4 |
|
1055 |
* @see #setReuseAddress(boolean) |
|
1056 |
*/ |
|
1057 |
public synchronized boolean getReuseAddress() throws SocketException { |
|
1058 |
if (isClosed()) |
|
1059 |
throw new SocketException("Socket is closed"); |
|
1060 |
Object o = getImpl().getOption(SocketOptions.SO_REUSEADDR); |
|
1061 |
return ((Boolean)o).booleanValue(); |
|
1062 |
} |
|
1063 |
||
1064 |
/** |
|
1065 |
* Enable/disable SO_BROADCAST. |
|
1817
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1066 |
* |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1067 |
* <p> Some operating systems may require that the Java virtual machine be |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1068 |
* started with implementation specific privileges to enable this option or |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1069 |
* send broadcast datagrams. |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1070 |
* |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1071 |
* @param on |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1072 |
* whether or not to have broadcast turned on. |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1073 |
* |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1074 |
* @throws SocketException |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1075 |
* if there is an error in the underlying protocol, such as an UDP |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1076 |
* error. |
2deb4cc4d5dc
6755782: It is not clear how DatagramSocket deals with broadcast enabling/disabling
chegar
parents:
715
diff
changeset
|
1077 |
* |
2 | 1078 |
* @since 1.4 |
1079 |
* @see #getBroadcast() |
|
1080 |
*/ |
|
1081 |
public synchronized void setBroadcast(boolean on) throws SocketException { |
|
1082 |
if (isClosed()) |
|
1083 |
throw new SocketException("Socket is closed"); |
|
1084 |
getImpl().setOption(SocketOptions.SO_BROADCAST, Boolean.valueOf(on)); |
|
1085 |
} |
|
1086 |
||
1087 |
/** |
|
1088 |
* Tests if SO_BROADCAST is enabled. |
|
19069 | 1089 |
* @return a {@code boolean} indicating whether or not SO_BROADCAST is enabled. |
2 | 1090 |
* @exception SocketException if there is an error |
1091 |
* in the underlying protocol, such as an UDP error. |
|
1092 |
* @since 1.4 |
|
1093 |
* @see #setBroadcast(boolean) |
|
1094 |
*/ |
|
1095 |
public synchronized boolean getBroadcast() throws SocketException { |
|
1096 |
if (isClosed()) |
|
1097 |
throw new SocketException("Socket is closed"); |
|
1098 |
return ((Boolean)(getImpl().getOption(SocketOptions.SO_BROADCAST))).booleanValue(); |
|
1099 |
} |
|
1100 |
||
1101 |
/** |
|
1102 |
* Sets traffic class or type-of-service octet in the IP |
|
1103 |
* datagram header for datagrams sent from this DatagramSocket. |
|
1104 |
* As the underlying network implementation may ignore this |
|
1105 |
* value applications should consider it a hint. |
|
1106 |
* |
|
18156 | 1107 |
* <P> The tc <B>must</B> be in the range {@code 0 <= tc <= |
1108 |
* 255} or an IllegalArgumentException will be thrown. |
|
2 | 1109 |
* <p>Notes: |
1110 |
* <p>For Internet Protocol v4 the value consists of an |
|
19069 | 1111 |
* {@code integer}, the least significant 8 bits of which |
2 | 1112 |
* represent the value of the TOS octet in IP packets sent by |
1113 |
* the socket. |
|
1114 |
* RFC 1349 defines the TOS values as follows: |
|
21334 | 1115 |
* |
2 | 1116 |
* <UL> |
1117 |
* <LI><CODE>IPTOS_LOWCOST (0x02)</CODE></LI> |
|
1118 |
* <LI><CODE>IPTOS_RELIABILITY (0x04)</CODE></LI> |
|
1119 |
* <LI><CODE>IPTOS_THROUGHPUT (0x08)</CODE></LI> |
|
1120 |
* <LI><CODE>IPTOS_LOWDELAY (0x10)</CODE></LI> |
|
1121 |
* </UL> |
|
1122 |
* The last low order bit is always ignored as this |
|
1123 |
* corresponds to the MBZ (must be zero) bit. |
|
1124 |
* <p> |
|
1125 |
* Setting bits in the precedence field may result in a |
|
1126 |
* SocketException indicating that the operation is not |
|
1127 |
* permitted. |
|
1128 |
* <p> |
|
19069 | 1129 |
* for Internet Protocol v6 {@code tc} is the value that |
2 | 1130 |
* would be placed into the sin6_flowinfo field of the IP header. |
1131 |
* |
|
19069 | 1132 |
* @param tc an {@code int} value for the bitset. |
2 | 1133 |
* @throws SocketException if there is an error setting the |
1134 |
* traffic class or type-of-service |
|
1135 |
* @since 1.4 |
|
1136 |
* @see #getTrafficClass |
|
1137 |
*/ |
|
1138 |
public synchronized void setTrafficClass(int tc) throws SocketException { |
|
1139 |
if (tc < 0 || tc > 255) |
|
1140 |
throw new IllegalArgumentException("tc is not in range 0 -- 255"); |
|
1141 |
||
1142 |
if (isClosed()) |
|
1143 |
throw new SocketException("Socket is closed"); |
|
1144 |
getImpl().setOption(SocketOptions.IP_TOS, new Integer(tc)); |
|
1145 |
} |
|
1146 |
||
1147 |
/** |
|
1148 |
* Gets traffic class or type-of-service in the IP datagram |
|
1149 |
* header for packets sent from this DatagramSocket. |
|
1150 |
* <p> |
|
1151 |
* As the underlying network implementation may ignore the |
|
1152 |
* traffic class or type-of-service set using {@link #setTrafficClass(int)} |
|
1153 |
* this method may return a different value than was previously |
|
1154 |
* set using the {@link #setTrafficClass(int)} method on this |
|
1155 |
* DatagramSocket. |
|
1156 |
* |
|
1157 |
* @return the traffic class or type-of-service already set |
|
1158 |
* @throws SocketException if there is an error obtaining the |
|
1159 |
* traffic class or type-of-service value. |
|
1160 |
* @since 1.4 |
|
1161 |
* @see #setTrafficClass(int) |
|
1162 |
*/ |
|
1163 |
public synchronized int getTrafficClass() throws SocketException { |
|
1164 |
if (isClosed()) |
|
1165 |
throw new SocketException("Socket is closed"); |
|
1166 |
return ((Integer)(getImpl().getOption(SocketOptions.IP_TOS))).intValue(); |
|
1167 |
} |
|
1168 |
||
1169 |
/** |
|
1170 |
* Closes this datagram socket. |
|
1171 |
* <p> |
|
1172 |
* Any thread currently blocked in {@link #receive} upon this socket |
|
1173 |
* will throw a {@link SocketException}. |
|
1174 |
* |
|
1175 |
* <p> If this socket has an associated channel then the channel is closed |
|
1176 |
* as well. |
|
1177 |
* |
|
1178 |
* @revised 1.4 |
|
1179 |
* @spec JSR-51 |
|
1180 |
*/ |
|
1181 |
public void close() { |
|
1182 |
synchronized(closeLock) { |
|
1183 |
if (isClosed()) |
|
1184 |
return; |
|
1185 |
impl.close(); |
|
1186 |
closed = true; |
|
1187 |
} |
|
1188 |
} |
|
1189 |
||
1190 |
/** |
|
1191 |
* Returns whether the socket is closed or not. |
|
1192 |
* |
|
1193 |
* @return true if the socket has been closed |
|
1194 |
* @since 1.4 |
|
1195 |
*/ |
|
1196 |
public boolean isClosed() { |
|
1197 |
synchronized(closeLock) { |
|
1198 |
return closed; |
|
1199 |
} |
|
1200 |
} |
|
1201 |
||
1202 |
/** |
|
1203 |
* Returns the unique {@link java.nio.channels.DatagramChannel} object |
|
1204 |
* associated with this datagram socket, if any. |
|
1205 |
* |
|
1206 |
* <p> A datagram socket will have a channel if, and only if, the channel |
|
1207 |
* itself was created via the {@link java.nio.channels.DatagramChannel#open |
|
1208 |
* DatagramChannel.open} method. |
|
1209 |
* |
|
1210 |
* @return the datagram channel associated with this datagram socket, |
|
19069 | 1211 |
* or {@code null} if this socket was not created for a channel |
2 | 1212 |
* |
1213 |
* @since 1.4 |
|
1214 |
* @spec JSR-51 |
|
1215 |
*/ |
|
1216 |
public DatagramChannel getChannel() { |
|
1217 |
return null; |
|
1218 |
} |
|
1219 |
||
1220 |
/** |
|
1221 |
* User defined factory for all datagram sockets. |
|
1222 |
*/ |
|
1223 |
static DatagramSocketImplFactory factory; |
|
1224 |
||
1225 |
/** |
|
1226 |
* Sets the datagram socket implementation factory for the |
|
1227 |
* application. The factory can be specified only once. |
|
1228 |
* <p> |
|
1229 |
* When an application creates a new datagram socket, the socket |
|
19069 | 1230 |
* implementation factory's {@code createDatagramSocketImpl} method is |
2 | 1231 |
* called to create the actual datagram socket implementation. |
1232 |
* <p> |
|
19069 | 1233 |
* Passing {@code null} to the method is a no-op unless the factory |
2 | 1234 |
* was already set. |
1235 |
* |
|
1236 |
* <p>If there is a security manager, this method first calls |
|
19069 | 1237 |
* the security manager's {@code checkSetFactory} method |
2 | 1238 |
* to ensure the operation is allowed. |
1239 |
* This could result in a SecurityException. |
|
1240 |
* |
|
1241 |
* @param fac the desired factory. |
|
1242 |
* @exception IOException if an I/O error occurs when setting the |
|
1243 |
* datagram socket factory. |
|
1244 |
* @exception SocketException if the factory is already defined. |
|
1245 |
* @exception SecurityException if a security manager exists and its |
|
23720
7d5147c21927
8039172: Tidy warnings cleanup for java.net, java.math, java.time, java.rmi
yan
parents:
21428
diff
changeset
|
1246 |
* {@code checkSetFactory} method doesn't allow the operation. |
7d5147c21927
8039172: Tidy warnings cleanup for java.net, java.math, java.time, java.rmi
yan
parents:
21428
diff
changeset
|
1247 |
* @see java.net.DatagramSocketImplFactory#createDatagramSocketImpl() |
2 | 1248 |
* @see SecurityManager#checkSetFactory |
1249 |
* @since 1.3 |
|
1250 |
*/ |
|
1251 |
public static synchronized void |
|
1252 |
setDatagramSocketImplFactory(DatagramSocketImplFactory fac) |
|
1253 |
throws IOException |
|
1254 |
{ |
|
1255 |
if (factory != null) { |
|
1256 |
throw new SocketException("factory already defined"); |
|
1257 |
} |
|
1258 |
SecurityManager security = System.getSecurityManager(); |
|
1259 |
if (security != null) { |
|
1260 |
security.checkSetFactory(); |
|
1261 |
} |
|
1262 |
factory = fac; |
|
1263 |
} |
|
23879
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1264 |
|
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1265 |
/** |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1266 |
* Sets the value of a socket option. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1267 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1268 |
* @param name The socket option |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1269 |
* @param value The value of the socket option. A value of {@code null} |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1270 |
* may be valid for some options. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1271 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1272 |
* @return this DatagramSocket |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1273 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1274 |
* @throws UnsupportedOperationException if the datagram socket |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1275 |
* does not support the option. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1276 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1277 |
* @throws IllegalArgumentException if the value is not valid for |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1278 |
* the option. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1279 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1280 |
* @throws IOException if an I/O error occurs, or if the socket is closed. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1281 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1282 |
* @throws SecurityException if a security manager is set and if the socket |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1283 |
* option requires a security permission and if the caller does |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1284 |
* not have the required permission. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1285 |
* {@link java.net.StandardSocketOptions StandardSocketOptions} |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1286 |
* do not require any security permission. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1287 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1288 |
* @throws NullPointerException if name is {@code null} |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1289 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1290 |
* @since 1.9 |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1291 |
*/ |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1292 |
public <T> DatagramSocket setOption(SocketOption<T> name, T value) |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1293 |
throws IOException |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1294 |
{ |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1295 |
getImpl().setOption(name, value); |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1296 |
return this; |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1297 |
} |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1298 |
|
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1299 |
/** |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1300 |
* Returns the value of a socket option. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1301 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1302 |
* @param name The socket option |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1303 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1304 |
* @return The value of the socket option. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1305 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1306 |
* @throws UnsupportedOperationException if the datagram socket |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1307 |
* does not support the option. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1308 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1309 |
* @throws IOException if an I/O error occurs, or if the socket is closed. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1310 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1311 |
* @throws NullPointerException if name is {@code null} |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1312 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1313 |
* @throws SecurityException if a security manager is set and if the socket |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1314 |
* option requires a security permission and if the caller does |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1315 |
* not have the required permission. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1316 |
* {@link java.net.StandardSocketOptions StandardSocketOptions} |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1317 |
* do not require any security permission. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1318 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1319 |
* @since 1.9 |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1320 |
*/ |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1321 |
public <T> T getOption(SocketOption<T> name) throws IOException { |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1322 |
return getImpl().getOption(name); |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1323 |
} |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1324 |
|
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1325 |
private static Set<SocketOption<?>> options; |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1326 |
private static boolean optionsSet = false; |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1327 |
|
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1328 |
/** |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1329 |
* Returns a set of the socket options supported by this socket. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1330 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1331 |
* This method will continue to return the set of options even after |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1332 |
* the socket has been closed. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1333 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1334 |
* @return A set of the socket options supported by this socket. This set |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
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diff
changeset
|
1335 |
* may be empty if the socket's DatagramSocketImpl cannot be created. |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
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diff
changeset
|
1336 |
* |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
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diff
changeset
|
1337 |
* @since 1.9 |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
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diff
changeset
|
1338 |
*/ |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
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diff
changeset
|
1339 |
public Set<SocketOption<?>> supportedOptions() { |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
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diff
changeset
|
1340 |
synchronized(DatagramSocket.class) { |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1341 |
if (optionsSet) { |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1342 |
return options; |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1343 |
} |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1344 |
try { |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1345 |
DatagramSocketImpl impl = getImpl(); |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
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diff
changeset
|
1346 |
options = Collections.unmodifiableSet(impl.supportedOptions()); |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1347 |
} catch (IOException e) { |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1348 |
options = Collections.emptySet(); |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1349 |
} |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1350 |
optionsSet = true; |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1351 |
return options; |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1352 |
} |
284802a2d355
8036979: Support java.net.SocketOption<> in java.net socket types
michaelm
parents:
23720
diff
changeset
|
1353 |
} |
2 | 1354 |
} |