author | ohair |
Wed, 06 Apr 2011 22:06:11 -0700 | |
changeset 9035 | 1255eb81cc2f |
parent 8817 | 5351579c46a9 |
child 10594 | d6723ee39ebf |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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* Copyright (c) 1996, 2011, 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.FileDescriptor; |
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import java.io.IOException; |
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import java.io.InterruptedIOException; |
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import java.util.Enumeration; |
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import sun.net.ResourceManager; |
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/** |
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* Abstract datagram and multicast socket implementation base class. |
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* Note: This is not a public class, so that applets cannot call |
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* into the implementation directly and hence cannot bypass the |
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* security checks present in the DatagramSocket and MulticastSocket |
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* classes. |
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* |
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* @author Pavani Diwanji |
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*/ |
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abstract class AbstractPlainDatagramSocketImpl extends DatagramSocketImpl |
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{ |
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/* timeout value for receive() */ |
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int timeout = 0; |
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boolean connected = false; |
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private int trafficClass = 0; |
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private InetAddress connectedAddress = null; |
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private int connectedPort = -1; |
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/* cached socket options */ |
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private int multicastInterface = 0; |
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private boolean loopbackMode = true; |
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private int ttl = -1; |
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/** |
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* Load net library into runtime. |
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*/ |
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static { |
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java.security.AccessController.doPrivileged( |
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new sun.security.action.LoadLibraryAction("net")); |
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} |
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/** |
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* Creates a datagram socket |
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*/ |
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protected synchronized void create() throws SocketException { |
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fd = new FileDescriptor(); |
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ResourceManager.beforeUdpCreate(); |
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try { |
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datagramSocketCreate(); |
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} catch (SocketException ioe) { |
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ResourceManager.afterUdpClose(); |
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fd = null; |
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throw ioe; |
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} |
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} |
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/** |
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* Binds a datagram socket to a local port. |
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*/ |
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protected synchronized void bind(int lport, InetAddress laddr) |
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throws SocketException { |
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bind0(lport, laddr); |
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} |
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protected abstract void bind0(int lport, InetAddress laddr) |
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throws SocketException; |
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/** |
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* Sends a datagram packet. The packet contains the data and the |
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* destination address to send the packet to. |
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* @param packet to be sent. |
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*/ |
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protected abstract void send(DatagramPacket p) throws IOException; |
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/** |
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* Connects a datagram socket to a remote destination. This associates the remote |
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* address with the local socket so that datagrams may only be sent to this destination |
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* and received from this destination. |
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* @param address the remote InetAddress to connect to |
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* @param port the remote port number |
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*/ |
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protected void connect(InetAddress address, int port) throws SocketException { |
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connect0(address, port); |
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connectedAddress = address; |
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connectedPort = port; |
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connected = true; |
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} |
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/** |
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* Disconnects a previously connected socket. Does nothing if the socket was |
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* not connected already. |
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*/ |
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protected void disconnect() { |
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disconnect0(connectedAddress.family); |
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connected = false; |
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connectedAddress = null; |
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connectedPort = -1; |
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} |
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/** |
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* Peek at the packet to see who it is from. |
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* @param return the address which the packet came from. |
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*/ |
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protected abstract int peek(InetAddress i) throws IOException; |
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protected abstract int peekData(DatagramPacket p) throws IOException; |
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/** |
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* Receive the datagram packet. |
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* @param Packet Received. |
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*/ |
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protected synchronized void receive(DatagramPacket p) |
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throws IOException { |
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receive0(p); |
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} |
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protected abstract void receive0(DatagramPacket p) |
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throws IOException; |
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/** |
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* Set the TTL (time-to-live) option. |
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* @param TTL to be set. |
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*/ |
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protected abstract void setTimeToLive(int ttl) throws IOException; |
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/** |
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* Get the TTL (time-to-live) option. |
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*/ |
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protected abstract int getTimeToLive() throws IOException; |
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/** |
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* Set the TTL (time-to-live) option. |
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* @param TTL to be set. |
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*/ |
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protected abstract void setTTL(byte ttl) throws IOException; |
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/** |
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* Get the TTL (time-to-live) option. |
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*/ |
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protected abstract byte getTTL() throws IOException; |
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/** |
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* Join the multicast group. |
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* @param multicast address to join. |
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*/ |
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protected void join(InetAddress inetaddr) throws IOException { |
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join(inetaddr, null); |
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} |
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/** |
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* Leave the multicast group. |
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* @param multicast address to leave. |
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*/ |
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protected void leave(InetAddress inetaddr) throws IOException { |
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leave(inetaddr, null); |
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} |
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/** |
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* Join the multicast group. |
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* @param multicast address to join. |
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* @param netIf specifies the local interface to receive multicast |
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* datagram packets |
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* @throws IllegalArgumentException if mcastaddr is null or is a |
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* SocketAddress subclass not supported by this socket |
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* @since 1.4 |
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*/ |
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protected void joinGroup(SocketAddress mcastaddr, NetworkInterface netIf) |
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throws IOException { |
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if (mcastaddr == null || !(mcastaddr instanceof InetSocketAddress)) |
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throw new IllegalArgumentException("Unsupported address type"); |
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join(((InetSocketAddress)mcastaddr).getAddress(), netIf); |
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} |
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protected abstract void join(InetAddress inetaddr, NetworkInterface netIf) |
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throws IOException; |
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/** |
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* Leave the multicast group. |
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* @param multicast address to leave. |
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* @param netIf specified the local interface to leave the group at |
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* @throws IllegalArgumentException if mcastaddr is null or is a |
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* SocketAddress subclass not supported by this socket |
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* @since 1.4 |
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*/ |
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protected void leaveGroup(SocketAddress mcastaddr, NetworkInterface netIf) |
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throws IOException { |
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if (mcastaddr == null || !(mcastaddr instanceof InetSocketAddress)) |
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throw new IllegalArgumentException("Unsupported address type"); |
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leave(((InetSocketAddress)mcastaddr).getAddress(), netIf); |
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} |
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protected abstract void leave(InetAddress inetaddr, NetworkInterface netIf) |
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throws IOException; |
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/** |
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* Close the socket. |
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*/ |
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protected void close() { |
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if (fd != null) { |
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datagramSocketClose(); |
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ResourceManager.afterUdpClose(); |
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fd = null; |
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} |
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} |
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protected boolean isClosed() { |
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return (fd == null) ? true : false; |
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} |
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protected void finalize() { |
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close(); |
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} |
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/** |
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* set a value - since we only support (setting) binary options |
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* here, o must be a Boolean |
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*/ |
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public void setOption(int optID, Object o) throws SocketException { |
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if (isClosed()) { |
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throw new SocketException("Socket Closed"); |
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} |
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switch (optID) { |
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/* check type safety b4 going native. These should never |
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* fail, since only java.Socket* has access to |
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* PlainSocketImpl.setOption(). |
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*/ |
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case SO_TIMEOUT: |
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if (o == null || !(o instanceof Integer)) { |
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throw new SocketException("bad argument for SO_TIMEOUT"); |
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} |
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int tmp = ((Integer) o).intValue(); |
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if (tmp < 0) |
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throw new IllegalArgumentException("timeout < 0"); |
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timeout = tmp; |
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return; |
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case IP_TOS: |
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if (o == null || !(o instanceof Integer)) { |
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throw new SocketException("bad argument for IP_TOS"); |
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} |
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trafficClass = ((Integer)o).intValue(); |
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break; |
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case SO_REUSEADDR: |
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if (o == null || !(o instanceof Boolean)) { |
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throw new SocketException("bad argument for SO_REUSEADDR"); |
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} |
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break; |
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case SO_BROADCAST: |
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if (o == null || !(o instanceof Boolean)) { |
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throw new SocketException("bad argument for SO_BROADCAST"); |
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} |
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break; |
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case SO_BINDADDR: |
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throw new SocketException("Cannot re-bind Socket"); |
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case SO_RCVBUF: |
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case SO_SNDBUF: |
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if (o == null || !(o instanceof Integer) || |
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((Integer)o).intValue() < 0) { |
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280 |
throw new SocketException("bad argument for SO_SNDBUF or " + |
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"SO_RCVBUF"); |
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} |
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break; |
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case IP_MULTICAST_IF: |
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if (o == null || !(o instanceof InetAddress)) |
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throw new SocketException("bad argument for IP_MULTICAST_IF"); |
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break; |
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case IP_MULTICAST_IF2: |
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if (o == null || !(o instanceof NetworkInterface)) |
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throw new SocketException("bad argument for IP_MULTICAST_IF2"); |
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break; |
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case IP_MULTICAST_LOOP: |
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if (o == null || !(o instanceof Boolean)) |
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throw new SocketException("bad argument for IP_MULTICAST_LOOP"); |
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break; |
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default: |
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297 |
throw new SocketException("invalid option: " + optID); |
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298 |
} |
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299 |
socketSetOption(optID, o); |
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300 |
} |
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301 |
||
302 |
/* |
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303 |
* get option's state - set or not |
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304 |
*/ |
|
305 |
||
306 |
public Object getOption(int optID) throws SocketException { |
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307 |
if (isClosed()) { |
|
308 |
throw new SocketException("Socket Closed"); |
|
309 |
} |
|
310 |
||
311 |
Object result; |
|
312 |
||
313 |
switch (optID) { |
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314 |
case SO_TIMEOUT: |
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315 |
result = new Integer(timeout); |
|
316 |
break; |
|
317 |
||
318 |
case IP_TOS: |
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319 |
result = socketGetOption(optID); |
|
320 |
if ( ((Integer)result).intValue() == -1) { |
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321 |
result = new Integer(trafficClass); |
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322 |
} |
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323 |
break; |
|
324 |
||
325 |
case SO_BINDADDR: |
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326 |
case IP_MULTICAST_IF: |
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327 |
case IP_MULTICAST_IF2: |
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case SO_RCVBUF: |
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329 |
case SO_SNDBUF: |
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330 |
case IP_MULTICAST_LOOP: |
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case SO_REUSEADDR: |
|
332 |
case SO_BROADCAST: |
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333 |
result = socketGetOption(optID); |
|
334 |
break; |
|
335 |
||
336 |
default: |
|
337 |
throw new SocketException("invalid option: " + optID); |
|
338 |
} |
|
339 |
||
340 |
return result; |
|
341 |
} |
|
342 |
||
343 |
protected abstract void datagramSocketCreate() throws SocketException; |
|
344 |
protected abstract void datagramSocketClose(); |
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345 |
protected abstract void socketSetOption(int opt, Object val) |
|
346 |
throws SocketException; |
|
347 |
protected abstract Object socketGetOption(int opt) throws SocketException; |
|
348 |
||
349 |
protected abstract void connect0(InetAddress address, int port) throws SocketException; |
|
350 |
protected abstract void disconnect0(int family); |
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351 |
||
352 |
} |