| /* |
| * Copyright (c) 1996, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package java.net; |
| |
| import java.io.FileDescriptor; |
| import java.io.IOException; |
| import java.security.AccessController; |
| import sun.net.ResourceManager; |
| import java.util.Set; |
| import java.util.HashSet; |
| import java.util.Collections; |
| import sun.security.action.GetPropertyAction; |
| |
| /** |
| * Abstract datagram and multicast socket implementation base class. |
| * Note: This is not a public class, so that applets cannot call |
| * into the implementation directly and hence cannot bypass the |
| * security checks present in the DatagramSocket and MulticastSocket |
| * classes. |
| * |
| * @author Pavani Diwanji |
| */ |
| |
| abstract class AbstractPlainDatagramSocketImpl extends DatagramSocketImpl |
| { |
| /* timeout value for receive() */ |
| int timeout = 0; |
| boolean connected = false; |
| private int trafficClass = 0; |
| protected InetAddress connectedAddress = null; |
| private int connectedPort = -1; |
| |
| private static final String os = GetPropertyAction.getProperty("os.name"); |
| |
| /** |
| * flag set if the native connect() call not to be used |
| */ |
| private static final boolean connectDisabled = os.contains("OS X"); |
| |
| /** |
| * Load net library into runtime. |
| */ |
| static { |
| java.security.AccessController.doPrivileged( |
| new java.security.PrivilegedAction<>() { |
| public Void run() { |
| System.loadLibrary("net"); |
| return null; |
| } |
| }); |
| } |
| |
| private static volatile boolean checkedReusePort; |
| private static volatile boolean isReusePortAvailable; |
| |
| /** |
| * Tells whether SO_REUSEPORT is supported. |
| */ |
| static boolean isReusePortAvailable() { |
| if (!checkedReusePort) { |
| isReusePortAvailable = isReusePortAvailable0(); |
| checkedReusePort = true; |
| } |
| return isReusePortAvailable; |
| } |
| |
| private static volatile Set<SocketOption<?>> socketOptions; |
| |
| /** |
| * Returns a set of SocketOptions supported by this impl |
| * and by this impl's socket (Socket or ServerSocket) |
| * |
| * @return a Set of SocketOptions |
| */ |
| @Override |
| protected Set<SocketOption<?>> supportedOptions() { |
| Set<SocketOption<?>> options = socketOptions; |
| if (options == null) { |
| if (isReusePortAvailable()) { |
| options = new HashSet<>(); |
| options.addAll(super.supportedOptions()); |
| options.add(StandardSocketOptions.SO_REUSEPORT); |
| options = Collections.unmodifiableSet(options); |
| } else { |
| options = super.supportedOptions(); |
| } |
| socketOptions = options; |
| } |
| return options; |
| } |
| |
| /** |
| * Creates a datagram socket |
| */ |
| protected synchronized void create() throws SocketException { |
| ResourceManager.beforeUdpCreate(); |
| fd = new FileDescriptor(); |
| try { |
| datagramSocketCreate(); |
| } catch (SocketException ioe) { |
| ResourceManager.afterUdpClose(); |
| fd = null; |
| throw ioe; |
| } |
| } |
| |
| /** |
| * Binds a datagram socket to a local port. |
| */ |
| protected synchronized void bind(int lport, InetAddress laddr) |
| throws SocketException { |
| bind0(lport, laddr); |
| } |
| |
| protected abstract void bind0(int lport, InetAddress laddr) |
| throws SocketException; |
| |
| /** |
| * Sends a datagram packet. The packet contains the data and the |
| * destination address to send the packet to. |
| * @param p the packet to be sent. |
| */ |
| protected abstract void send(DatagramPacket p) throws IOException; |
| |
| /** |
| * Connects a datagram socket to a remote destination. This associates the remote |
| * address with the local socket so that datagrams may only be sent to this destination |
| * and received from this destination. |
| * @param address the remote InetAddress to connect to |
| * @param port the remote port number |
| */ |
| protected void connect(InetAddress address, int port) throws SocketException { |
| connect0(address, port); |
| connectedAddress = address; |
| connectedPort = port; |
| connected = true; |
| } |
| |
| /** |
| * Disconnects a previously connected socket. Does nothing if the socket was |
| * not connected already. |
| */ |
| protected void disconnect() { |
| disconnect0(connectedAddress.holder().getFamily()); |
| connected = false; |
| connectedAddress = null; |
| connectedPort = -1; |
| } |
| |
| /** |
| * Peek at the packet to see who it is from. |
| * @param i the address to populate with the sender address |
| */ |
| protected abstract int peek(InetAddress i) throws IOException; |
| protected abstract int peekData(DatagramPacket p) throws IOException; |
| /** |
| * Receive the datagram packet. |
| * @param p the packet to receive into |
| */ |
| protected synchronized void receive(DatagramPacket p) |
| throws IOException { |
| receive0(p); |
| } |
| |
| protected abstract void receive0(DatagramPacket p) |
| throws IOException; |
| |
| /** |
| * Set the TTL (time-to-live) option. |
| * @param ttl TTL to be set. |
| */ |
| protected abstract void setTimeToLive(int ttl) throws IOException; |
| |
| /** |
| * Get the TTL (time-to-live) option. |
| */ |
| protected abstract int getTimeToLive() throws IOException; |
| |
| /** |
| * Set the TTL (time-to-live) option. |
| * @param ttl TTL to be set. |
| */ |
| @Deprecated |
| protected abstract void setTTL(byte ttl) throws IOException; |
| |
| /** |
| * Get the TTL (time-to-live) option. |
| */ |
| @Deprecated |
| protected abstract byte getTTL() throws IOException; |
| |
| /** |
| * Join the multicast group. |
| * @param inetaddr multicast address to join. |
| */ |
| protected void join(InetAddress inetaddr) throws IOException { |
| join(inetaddr, null); |
| } |
| |
| /** |
| * Leave the multicast group. |
| * @param inetaddr multicast address to leave. |
| */ |
| protected void leave(InetAddress inetaddr) throws IOException { |
| leave(inetaddr, null); |
| } |
| /** |
| * Join the multicast group. |
| * @param mcastaddr multicast address to join. |
| * @param netIf specifies the local interface to receive multicast |
| * datagram packets |
| * @throws IllegalArgumentException if mcastaddr is null or is a |
| * SocketAddress subclass not supported by this socket |
| * @since 1.4 |
| */ |
| |
| protected void joinGroup(SocketAddress mcastaddr, NetworkInterface netIf) |
| throws IOException { |
| if (mcastaddr == null || !(mcastaddr instanceof InetSocketAddress)) |
| throw new IllegalArgumentException("Unsupported address type"); |
| join(((InetSocketAddress)mcastaddr).getAddress(), netIf); |
| } |
| |
| protected abstract void join(InetAddress inetaddr, NetworkInterface netIf) |
| throws IOException; |
| |
| /** |
| * Leave the multicast group. |
| * @param mcastaddr multicast address to leave. |
| * @param netIf specified the local interface to leave the group at |
| * @throws IllegalArgumentException if mcastaddr is null or is a |
| * SocketAddress subclass not supported by this socket |
| * @since 1.4 |
| */ |
| protected void leaveGroup(SocketAddress mcastaddr, NetworkInterface netIf) |
| throws IOException { |
| if (mcastaddr == null || !(mcastaddr instanceof InetSocketAddress)) |
| throw new IllegalArgumentException("Unsupported address type"); |
| leave(((InetSocketAddress)mcastaddr).getAddress(), netIf); |
| } |
| |
| protected abstract void leave(InetAddress inetaddr, NetworkInterface netIf) |
| throws IOException; |
| |
| /** |
| * Close the socket. |
| */ |
| protected void close() { |
| if (fd != null) { |
| datagramSocketClose(); |
| ResourceManager.afterUdpClose(); |
| fd = null; |
| } |
| } |
| |
| protected boolean isClosed() { |
| return (fd == null) ? true : false; |
| } |
| |
| protected void finalize() { |
| close(); |
| } |
| |
| /** |
| * set a value - since we only support (setting) binary options |
| * here, o must be a Boolean |
| */ |
| |
| public void setOption(int optID, Object o) throws SocketException { |
| if (isClosed()) { |
| throw new SocketException("Socket Closed"); |
| } |
| switch (optID) { |
| /* check type safety b4 going native. These should never |
| * fail, since only java.Socket* has access to |
| * PlainSocketImpl.setOption(). |
| */ |
| case SO_TIMEOUT: |
| if (o == null || !(o instanceof Integer)) { |
| throw new SocketException("bad argument for SO_TIMEOUT"); |
| } |
| int tmp = ((Integer) o).intValue(); |
| if (tmp < 0) |
| throw new IllegalArgumentException("timeout < 0"); |
| timeout = tmp; |
| return; |
| case IP_TOS: |
| if (o == null || !(o instanceof Integer)) { |
| throw new SocketException("bad argument for IP_TOS"); |
| } |
| trafficClass = ((Integer)o).intValue(); |
| break; |
| case SO_REUSEADDR: |
| if (o == null || !(o instanceof Boolean)) { |
| throw new SocketException("bad argument for SO_REUSEADDR"); |
| } |
| break; |
| case SO_BROADCAST: |
| if (o == null || !(o instanceof Boolean)) { |
| throw new SocketException("bad argument for SO_BROADCAST"); |
| } |
| break; |
| case SO_BINDADDR: |
| throw new SocketException("Cannot re-bind Socket"); |
| case SO_RCVBUF: |
| case SO_SNDBUF: |
| if (o == null || !(o instanceof Integer) || |
| ((Integer)o).intValue() < 0) { |
| throw new SocketException("bad argument for SO_SNDBUF or " + |
| "SO_RCVBUF"); |
| } |
| break; |
| case IP_MULTICAST_IF: |
| if (o == null || !(o instanceof InetAddress)) |
| throw new SocketException("bad argument for IP_MULTICAST_IF"); |
| break; |
| case IP_MULTICAST_IF2: |
| if (o == null || !(o instanceof NetworkInterface)) |
| throw new SocketException("bad argument for IP_MULTICAST_IF2"); |
| break; |
| case IP_MULTICAST_LOOP: |
| if (o == null || !(o instanceof Boolean)) |
| throw new SocketException("bad argument for IP_MULTICAST_LOOP"); |
| break; |
| case SO_REUSEPORT: |
| if (o == null || !(o instanceof Boolean)) { |
| throw new SocketException("bad argument for SO_REUSEPORT"); |
| } |
| if (!supportedOptions().contains(StandardSocketOptions.SO_REUSEPORT)) { |
| throw new UnsupportedOperationException("unsupported option"); |
| } |
| break; |
| default: |
| throw new SocketException("invalid option: " + optID); |
| } |
| socketSetOption(optID, o); |
| } |
| |
| /* |
| * get option's state - set or not |
| */ |
| |
| public Object getOption(int optID) throws SocketException { |
| if (isClosed()) { |
| throw new SocketException("Socket Closed"); |
| } |
| |
| Object result; |
| |
| switch (optID) { |
| case SO_TIMEOUT: |
| result = timeout; |
| break; |
| |
| case IP_TOS: |
| result = socketGetOption(optID); |
| if ( ((Integer)result).intValue() == -1) { |
| result = trafficClass; |
| } |
| break; |
| |
| case SO_BINDADDR: |
| case IP_MULTICAST_IF: |
| case IP_MULTICAST_IF2: |
| case SO_RCVBUF: |
| case SO_SNDBUF: |
| case IP_MULTICAST_LOOP: |
| case SO_REUSEADDR: |
| case SO_BROADCAST: |
| result = socketGetOption(optID); |
| break; |
| |
| case SO_REUSEPORT: |
| if (!supportedOptions().contains(StandardSocketOptions.SO_REUSEPORT)) { |
| throw new UnsupportedOperationException("unsupported option"); |
| } |
| result = socketGetOption(optID); |
| break; |
| |
| default: |
| throw new SocketException("invalid option: " + optID); |
| } |
| |
| return result; |
| } |
| |
| protected abstract void datagramSocketCreate() throws SocketException; |
| protected abstract void datagramSocketClose(); |
| protected abstract void socketSetOption(int opt, Object val) |
| throws SocketException; |
| protected abstract Object socketGetOption(int opt) throws SocketException; |
| |
| protected abstract void connect0(InetAddress address, int port) throws SocketException; |
| protected abstract void disconnect0(int family); |
| |
| protected boolean nativeConnectDisabled() { |
| return connectDisabled; |
| } |
| |
| abstract int dataAvailable(); |
| private static native boolean isReusePortAvailable0(); |
| } |