author | jjg |
Thu, 28 Jul 2011 13:34:31 -0700 | |
changeset 10137 | d92637d3d673 |
parent 9679 | d98ae8bc45fc |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2009, 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 sun.nio.ch; |
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import java.net.SocketAddress; |
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import java.net.InetSocketAddress; |
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import java.net.InetAddress; |
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import java.io.FileDescriptor; |
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import java.io.IOException; |
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import java.util.Collections; |
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import java.util.Set; |
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import java.util.HashSet; |
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import java.nio.channels.SelectionKey; |
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import java.nio.channels.ClosedChannelException; |
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import java.nio.channels.NotYetBoundException; |
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import java.nio.channels.spi.SelectorProvider; |
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import com.sun.nio.sctp.IllegalUnbindException; |
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import com.sun.nio.sctp.SctpChannel; |
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import com.sun.nio.sctp.SctpServerChannel; |
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import com.sun.nio.sctp.SctpSocketOption; |
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import com.sun.nio.sctp.SctpStandardSocketOptions; |
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/** |
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* An implementation of SctpServerChannel |
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*/ |
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public class SctpServerChannelImpl extends SctpServerChannel |
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implements SelChImpl |
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{ |
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private final FileDescriptor fd; |
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private final int fdVal; |
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/* IDs of native thread doing accept, for signalling */ |
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private volatile long thread = 0; |
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/* Lock held by thread currently blocked in this channel */ |
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private final Object lock = new Object(); |
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/* Lock held by any thread that modifies the state fields declared below |
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* DO NOT invoke a blocking I/O operation while holding this lock! */ |
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private final Object stateLock = new Object(); |
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private enum ChannelState { |
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UNINITIALIZED, |
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INUSE, |
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KILLPENDING, |
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KILLED, |
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} |
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/* -- The following fields are protected by stateLock -- */ |
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private ChannelState state = ChannelState.UNINITIALIZED; |
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/* Binding: Once bound the port will remain constant. */ |
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int port = -1; |
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private HashSet<InetSocketAddress> localAddresses = new HashSet<InetSocketAddress>(); |
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/* Has the channel been bound to the wildcard address */ |
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private boolean wildcard; /* false */ |
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/* -- End of fields protected by stateLock -- */ |
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/** |
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* Initializes a new instance of this class. |
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*/ |
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public SctpServerChannelImpl(SelectorProvider provider) |
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throws IOException { |
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//TODO: update provider remove public modifier |
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super(provider); |
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this.fd = SctpNet.socket(true); |
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this.fdVal = IOUtil.fdVal(fd); |
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this.state = ChannelState.INUSE; |
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} |
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@Override |
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public SctpServerChannel bind(SocketAddress local, int backlog) |
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throws IOException { |
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synchronized (lock) { |
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synchronized (stateLock) { |
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if (!isOpen()) |
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throw new ClosedChannelException(); |
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if (isBound()) |
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SctpNet.throwAlreadyBoundException(); |
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InetSocketAddress isa = (local == null) ? |
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new InetSocketAddress(0) : Net.checkAddress(local); |
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SecurityManager sm = System.getSecurityManager(); |
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if (sm != null) |
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sm.checkListen(isa.getPort()); |
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Net.bind(fd, isa.getAddress(), isa.getPort()); |
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InetSocketAddress boundIsa = Net.localAddress(fd); |
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port = boundIsa.getPort(); |
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localAddresses.add(isa); |
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if (isa.getAddress().isAnyLocalAddress()) |
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wildcard = true; |
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SctpNet.listen(fdVal, backlog < 1 ? 50 : backlog); |
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} |
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} |
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return this; |
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} |
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@Override |
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public SctpServerChannel bindAddress(InetAddress address) |
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throws IOException { |
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return bindUnbindAddress(address, true); |
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} |
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@Override |
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public SctpServerChannel unbindAddress(InetAddress address) |
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throws IOException { |
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return bindUnbindAddress(address, false); |
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} |
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private SctpServerChannel bindUnbindAddress(InetAddress address, boolean add) |
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throws IOException { |
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if (address == null) |
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throw new IllegalArgumentException(); |
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synchronized (lock) { |
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synchronized (stateLock) { |
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if (!isOpen()) |
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throw new ClosedChannelException(); |
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if (!isBound()) |
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throw new NotYetBoundException(); |
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if (wildcard) |
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throw new IllegalStateException( |
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"Cannot add or remove addresses from a channel that is bound to the wildcard address"); |
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if (address.isAnyLocalAddress()) |
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throw new IllegalArgumentException( |
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"Cannot add or remove the wildcard address"); |
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if (add) { |
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for (InetSocketAddress addr : localAddresses) { |
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if (addr.getAddress().equals(address)) { |
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SctpNet.throwAlreadyBoundException(); |
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} |
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} |
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} else { /*removing */ |
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/* Verify that there is more than one address |
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* and that address is already bound */ |
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if (localAddresses.size() <= 1) |
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throw new IllegalUnbindException("Cannot remove address from a channel with only one address bound"); |
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boolean foundAddress = false; |
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for (InetSocketAddress addr : localAddresses) { |
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if (addr.getAddress().equals(address)) { |
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foundAddress = true; |
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break; |
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} |
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} |
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if (!foundAddress ) |
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throw new IllegalUnbindException("Cannot remove address from a channel that is not bound to that address"); |
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} |
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SctpNet.bindx(fdVal, new InetAddress[]{address}, port, add); |
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/* Update our internal Set to reflect the addition/removal */ |
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if (add) |
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localAddresses.add(new InetSocketAddress(address, port)); |
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else { |
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for (InetSocketAddress addr : localAddresses) { |
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if (addr.getAddress().equals(address)) { |
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localAddresses.remove(addr); |
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break; |
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} |
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} |
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} |
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} |
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} |
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return this; |
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} |
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private boolean isBound() { |
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synchronized (stateLock) { |
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return port == -1 ? false : true; |
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} |
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} |
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private void acceptCleanup() throws IOException { |
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synchronized (stateLock) { |
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thread = 0; |
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if (state == ChannelState.KILLPENDING) |
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kill(); |
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} |
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} |
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@Override |
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public SctpChannel accept() throws IOException { |
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synchronized (lock) { |
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if (!isOpen()) |
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throw new ClosedChannelException(); |
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if (!isBound()) |
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throw new NotYetBoundException(); |
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SctpChannel sc = null; |
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int n = 0; |
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FileDescriptor newfd = new FileDescriptor(); |
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InetSocketAddress[] isaa = new InetSocketAddress[1]; |
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try { |
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begin(); |
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if (!isOpen()) |
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return null; |
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thread = NativeThread.current(); |
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for (;;) { |
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n = accept0(fd, newfd, isaa); |
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if ((n == IOStatus.INTERRUPTED) && isOpen()) |
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continue; |
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break; |
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} |
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} finally { |
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acceptCleanup(); |
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end(n > 0); |
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assert IOStatus.check(n); |
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} |
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if (n < 1) |
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return null; |
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IOUtil.configureBlocking(newfd, true); |
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InetSocketAddress isa = isaa[0]; |
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sc = new SctpChannelImpl(provider(), newfd); |
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SecurityManager sm = System.getSecurityManager(); |
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if (sm != null) |
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sm.checkAccept(isa.getAddress().getHostAddress(), |
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isa.getPort()); |
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return sc; |
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} |
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} |
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@Override |
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protected void implConfigureBlocking(boolean block) throws IOException { |
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IOUtil.configureBlocking(fd, block); |
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} |
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@Override |
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public void implCloseSelectableChannel() throws IOException { |
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synchronized (stateLock) { |
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changeset
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SctpNet.preClose(fdVal); |
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if (thread != 0) |
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NativeThread.signal(thread); |
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if (!isRegistered()) |
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kill(); |
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} |
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} |
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@Override |
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public void kill() throws IOException { |
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synchronized (stateLock) { |
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if (state == ChannelState.KILLED) |
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return; |
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if (state == ChannelState.UNINITIALIZED) { |
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state = ChannelState.KILLED; |
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return; |
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} |
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assert !isOpen() && !isRegistered(); |
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// Postpone the kill if there is a thread in accept |
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if (thread == 0) { |
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SctpNet.close(fdVal); |
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state = ChannelState.KILLED; |
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} else { |
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state = ChannelState.KILLPENDING; |
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} |
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} |
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} |
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@Override |
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public FileDescriptor getFD() { |
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return fd; |
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} |
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@Override |
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public int getFDVal() { |
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return fdVal; |
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} |
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/** |
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* Translates native poll revent ops into a ready operation ops |
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*/ |
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private boolean translateReadyOps(int ops, int initialOps, |
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SelectionKeyImpl sk) { |
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int intOps = sk.nioInterestOps(); |
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int oldOps = sk.nioReadyOps(); |
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int newOps = initialOps; |
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if ((ops & PollArrayWrapper.POLLNVAL) != 0) { |
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/* This should only happen if this channel is pre-closed while a |
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* selection operation is in progress |
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* ## Throw an error if this channel has not been pre-closed */ |
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return false; |
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} |
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if ((ops & (PollArrayWrapper.POLLERR |
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| PollArrayWrapper.POLLHUP)) != 0) { |
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newOps = intOps; |
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sk.nioReadyOps(newOps); |
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return (newOps & ~oldOps) != 0; |
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} |
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if (((ops & PollArrayWrapper.POLLIN) != 0) && |
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((intOps & SelectionKey.OP_ACCEPT) != 0)) |
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newOps |= SelectionKey.OP_ACCEPT; |
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sk.nioReadyOps(newOps); |
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return (newOps & ~oldOps) != 0; |
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} |
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@Override |
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public boolean translateAndUpdateReadyOps(int ops, SelectionKeyImpl sk) { |
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return translateReadyOps(ops, sk.nioReadyOps(), sk); |
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} |
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@Override |
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public boolean translateAndSetReadyOps(int ops, SelectionKeyImpl sk) { |
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return translateReadyOps(ops, 0, sk); |
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} |
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@Override |
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public void translateAndSetInterestOps(int ops, SelectionKeyImpl sk) { |
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int newOps = 0; |
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/* Translate ops */ |
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if ((ops & SelectionKey.OP_ACCEPT) != 0) |
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newOps |= PollArrayWrapper.POLLIN; |
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/* Place ops into pollfd array */ |
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sk.selector.putEventOps(sk, newOps); |
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} |
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@Override |
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public <T> SctpServerChannel setOption(SctpSocketOption<T> name, T value) |
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throws IOException { |
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if (name == null) |
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throw new NullPointerException(); |
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if (!supportedOptions().contains(name)) |
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throw new UnsupportedOperationException("'" + name + "' not supported"); |
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synchronized (stateLock) { |
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if (!isOpen()) |
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throw new ClosedChannelException(); |
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363 |
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SctpNet.setSocketOption(fdVal, name, value, 0 /*oneToOne*/); |
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return this; |
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} |
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} |
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369 |
@Override |
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10137
d92637d3d673
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jjg
parents:
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diff
changeset
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370 |
@SuppressWarnings("unchecked") |
2542 | 371 |
public <T> T getOption(SctpSocketOption<T> name) throws IOException { |
372 |
if (name == null) |
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throw new NullPointerException(); |
|
374 |
if (!supportedOptions().contains(name)) |
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throw new UnsupportedOperationException("'" + name + "' not supported"); |
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376 |
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377 |
synchronized (stateLock) { |
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378 |
if (!isOpen()) |
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379 |
throw new ClosedChannelException(); |
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380 |
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381 |
return (T) SctpNet.getSocketOption(fdVal, name, 0 /*oneToOne*/); |
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} |
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383 |
} |
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384 |
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385 |
private static class DefaultOptionsHolder { |
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386 |
static final Set<SctpSocketOption<?>> defaultOptions = defaultOptions(); |
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387 |
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388 |
private static Set<SctpSocketOption<?>> defaultOptions() { |
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389 |
HashSet<SctpSocketOption<?>> set = new HashSet<SctpSocketOption<?>>(1); |
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diff
changeset
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390 |
set.add(SctpStandardSocketOptions.SCTP_INIT_MAXSTREAMS); |
2542 | 391 |
return Collections.unmodifiableSet(set); |
392 |
} |
|
393 |
} |
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394 |
||
395 |
@Override |
|
396 |
public final Set<SctpSocketOption<?>> supportedOptions() { |
|
397 |
return DefaultOptionsHolder.defaultOptions; |
|
398 |
} |
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399 |
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400 |
@Override |
|
401 |
public Set<SocketAddress> getAllLocalAddresses() |
|
402 |
throws IOException { |
|
403 |
synchronized (stateLock) { |
|
404 |
if (!isOpen()) |
|
405 |
throw new ClosedChannelException(); |
|
406 |
if (!isBound()) |
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changeset
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407 |
return Collections.emptySet(); |
2542 | 408 |
|
409 |
return SctpNet.getLocalAddresses(fdVal); |
|
410 |
} |
|
411 |
} |
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412 |
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413 |
/* Native */ |
|
414 |
private static native void initIDs(); |
|
415 |
||
416 |
private static native int accept0(FileDescriptor ssfd, |
|
417 |
FileDescriptor newfd, InetSocketAddress[] isaa) throws IOException; |
|
418 |
||
419 |
static { |
|
420 |
Util.load(); // loads nio & net native libraries |
|
421 |
java.security.AccessController.doPrivileged( |
|
422 |
new sun.security.action.LoadLibraryAction("sctp")); |
|
423 |
initIDs(); |
|
424 |
} |
|
425 |
} |