/*
* Copyright (c) 2000, 2019, 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
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package sun.nio.ch;
import java.io.FileDescriptor;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.net.ProtocolFamily;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.SocketException;
import java.net.SocketOption;
import java.net.SocketTimeoutException;
import java.net.StandardProtocolFamily;
import java.net.StandardSocketOptions;
import java.nio.ByteBuffer;
import java.nio.channels.AlreadyBoundException;
import java.nio.channels.AlreadyConnectedException;
import java.nio.channels.AsynchronousCloseException;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.ConnectionPendingException;
import java.nio.channels.IllegalBlockingModeException;
import java.nio.channels.NoConnectionPendingException;
import java.nio.channels.NotYetConnectedException;
import java.nio.channels.SelectionKey;
import java.nio.channels.SocketChannel;
import java.nio.channels.UnixDomainSocketAddress;
import java.nio.channels.spi.SelectorProvider;
import java.security.AccessController;
import java.util.Collections;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
import java.util.concurrent.locks.ReentrantLock;
import sun.net.ConnectionResetException;
import sun.net.NetHooks;
import sun.net.ext.ExtendedSocketOptions;
import sun.net.util.SocketExceptions;
/**
* An implementation of SocketChannels
*/
public class UnixDomainSocketChannelImpl extends SocketChannelImpl
{
public UnixDomainSocketChannelImpl(SelectorProvider sp, FileDescriptor fd, boolean bound)
throws IOException
{
super(sp, fd);
if (bound) {
synchronized (stateLock) {
this.localAddress = Net.localUnixAddress(fd);
}
}
}
// Constructor for sockets obtained from server sockets
//
UnixDomainSocketChannelImpl(SelectorProvider sp, FileDescriptor fd, SocketAddress isa)
throws IOException
{
super(sp, fd);
synchronized (stateLock) {
this.localAddress = Net.localUnixAddress(fd);
this.remoteAddress = isa;
this.state = ST_CONNECTED;
}
}
@Override
public SocketAddress getLocalAddress() throws IOException {
synchronized (stateLock) {
ensureOpen();
return localAddress; // TODO: revealed local address?
}
}
@Override
public SocketAddress getRemoteAddress() throws IOException {
synchronized (stateLock) {
ensureOpen();
return remoteAddress;
}
}
@Override
public <T> SocketChannel setOption(SocketOption<T> name, T value)
throws IOException
{
Objects.requireNonNull(name);
if (!supportedOptions().contains(name))
throw new UnsupportedOperationException("'" + name + "' not supported");
if (!name.type().isInstance(value))
throw new IllegalArgumentException("Invalid value '" + value + "'");
synchronized (stateLock) {
ensureOpen();
// no options that require special handling
Net.setSocketOption(fd, name, value);
return this;
}
}
@Override
@SuppressWarnings("unchecked")
public <T> T getOption(SocketOption<T> name)
throws IOException
{
Objects.requireNonNull(name);
if (!supportedOptions().contains(name))
throw new UnsupportedOperationException("'" + name + "' not supported");
synchronized (stateLock) {
ensureOpen();
// no options that require special handling
return (T) Net.getSocketOption(fd, name); // AF_UNIX
}
}
private static class DefaultOptionsHolder {
static final Set<SocketOption<?>> defaultOptions = defaultOptions();
private static Set<SocketOption<?>> defaultOptions() {
HashSet<SocketOption<?>> set = new HashSet<>();
set.add(StandardSocketOptions.SO_SNDBUF);
set.add(StandardSocketOptions.SO_RCVBUF);
set.add(StandardSocketOptions.SO_LINGER);
return Collections.unmodifiableSet(set);
}
}
@Override
public final Set<SocketOption<?>> supportedOptions() {
return DefaultOptionsHolder.defaultOptions;
}
@Override
public SocketChannel bind(SocketAddress local) throws IOException {
readLock.lock();
try {
writeLock.lock();
try {
synchronized (stateLock) {
ensureOpen();
if (state == ST_CONNECTIONPENDING)
throw new ConnectionPendingException();
if (localAddress != null)
throw new AlreadyBoundException();
UnixDomainSocketAddress usa = Net.checkUnixAddress(local);
Net.unixDomainBind(fd, usa);
localAddress = Net.localUnixAddress(fd);
}
} finally {
writeLock.unlock();
}
} finally {
readLock.unlock();
}
return this;
}
public Socket socket() {
throw new UnsupportedOperationException("socket not supported");
}
/**
* Checks the remote address to which this channel is to be connected.
*/
@Override
SocketAddress checkRemote(SocketAddress sa) throws IOException {
SocketAddress isa = Net.checkUnixAddress(sa);
return isa; // TODO
}
@Override
int connectImpl(FileDescriptor fd, SocketAddress sa) throws IOException {
UnixDomainSocketAddress isa = (UnixDomainSocketAddress)sa;
return Net.unixDomainConnect(fd, isa);
}
@Override
SocketAddress localAddressImpl(FileDescriptor fd) throws IOException {
return Net.localUnixAddress(fd);
}
String getRevealedLocalAddressAsString(SocketAddress sa) {
return sa.toString(); // TODO
}
}