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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/java/net/PlainSocketImpl.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/java/net/PlainSocketImpl.java | 678 |
1 files changed, 678 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/java/net/PlainSocketImpl.java b/gcc-4.4.3/libjava/classpath/gnu/java/net/PlainSocketImpl.java new file mode 100644 index 000000000..5bda0a5e9 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/java/net/PlainSocketImpl.java @@ -0,0 +1,678 @@ +/* PlainSocketImpl.java -- Default socket implementation + Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 + Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.net; + +import gnu.java.nio.SocketChannelImpl; +import gnu.java.nio.VMChannel; + +import java.io.InputStream; +import java.io.IOException; +import java.io.InterruptedIOException; +import java.io.OutputStream; +import java.net.InetAddress; +import java.net.InetSocketAddress; +import java.net.SocketAddress; +import java.net.SocketException; +import java.net.SocketImpl; +import java.net.SocketTimeoutException; +import java.nio.ByteBuffer; + +/** + * Written using on-line Java Platform 1.2 API Specification, as well + * as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998). + * Status: Believed complete and correct. + */ + +/** + * Unless the application installs its own SocketImplFactory, this is the + * default socket implemetation that will be used. It simply uses a + * combination of Java and native routines to implement standard BSD + * style sockets of family AF_INET and types SOCK_STREAM and SOCK_DGRAM + * + * @author Per Bothner (bothner@cygnus.com) + * @author Nic Ferrier (nferrier@tapsellferrier.co.uk) + * @author Aaron M. Renn (arenn@urbanophile.com) + */ +public class PlainSocketImpl extends SocketImpl +{ + + /** + * The underlying plain socket VM implementation. + */ + protected VMPlainSocketImpl impl; + + /** + * A cached copy of the in stream for reading from the socket. + */ + private InputStream in; + + /** + * A cached copy of the out stream for writing to the socket. + */ + private OutputStream out; + + /** + * Indicates whether a channel initiated whatever operation + * is being invoked on this socket. + */ + private boolean inChannelOperation; + + /** + * The socket channel we use for IO operation. Package-private for + * use by inner classes. + */ + SocketChannelImpl channel; + + /** + * Indicates whether we should ignore whether any associated + * channel is set to non-blocking mode. Certain operations + * throw an <code>IllegalBlockingModeException</code> if the + * associated channel is in non-blocking mode, <i>except</i> + * if the operation is invoked by the channel itself. + */ + public final boolean isInChannelOperation() + { + return inChannelOperation; + } + + /** + * Sets our indicator of whether an I/O operation is being + * initiated by a channel. + */ + public final void setInChannelOperation(boolean b) + { + inChannelOperation = b; + } + + /** + * Default do nothing constructor. + */ + public PlainSocketImpl() + { + this.impl = new VMPlainSocketImpl(); + } + + /** + * Sets the specified option on a socket to the passed in object. For + * options that take an integer argument, the passed in object is an + * Integer. The option_id parameter is one of the defined constants in + * this interface. + * + * @param optionId The identifier of the option + * @param value The value to set the option to + * + * @throws SocketException if an error occurs + */ + public void setOption(int optionId, Object value) throws SocketException + { + switch (optionId) + { + case SO_LINGER: + case IP_MULTICAST_LOOP: + case SO_BROADCAST: + case SO_KEEPALIVE: + case SO_OOBINLINE: + case TCP_NODELAY: + case IP_TOS: + case SO_RCVBUF: + case SO_SNDBUF: + case SO_TIMEOUT: + case SO_REUSEADDR: + impl.setOption(optionId, value); + return; + default: + throw new SocketException("Unrecognized TCP option: " + optionId); + } + } + + /** + * Returns the current setting of the specified option. The Object returned + * will be an Integer for options that have integer values. The option_id + * is one of the defined constants in this interface. + * + * @param optionId the option identifier + * + * @return the current value of the option + * + * @throws SocketException if an error occurs + */ + public Object getOption(int optionId) throws SocketException + { + if (optionId == SO_BINDADDR) + { + try + { + return channel.getVMChannel().getLocalAddress().getAddress(); + } + catch (IOException ioe) + { + SocketException se = new SocketException(); + se.initCause(ioe); + throw se; + } + } + + // This filters options which are invalid for TCP. + switch (optionId) + { + case SO_LINGER: + case IP_MULTICAST_LOOP: + case SO_BROADCAST: + case SO_KEEPALIVE: + case SO_OOBINLINE: + case TCP_NODELAY: + case IP_TOS: + case SO_RCVBUF: + case SO_SNDBUF: + case SO_TIMEOUT: + case SO_REUSEADDR: + return impl.getOption(optionId); + default: + throw new SocketException("Unrecognized TCP option: " + optionId); + } + + } + + public void shutdownInput() throws IOException + { + impl.shutdownInput(); + } + + public void shutdownOutput() throws IOException + { + impl.shutdownOutput(); + } + + /** + * Creates a new socket that is not bound to any local address/port and + * is not connected to any remote address/port. The stream parameter will be + * ignored since PlainSocketImpl always is a stream socket. Datagram sockets + * are handled by PlainDatagramSocketImpl. + * + * @param stream <code>true</code> for stream sockets, <code>false</code> for + * datagram sockets + */ + protected synchronized void create(boolean stream) throws IOException + { + channel = new SocketChannelImpl(false); + VMChannel vmchannel = channel.getVMChannel(); + vmchannel.initSocket(stream); + channel.configureBlocking(true); + impl.getState().setChannelFD(vmchannel.getState()); + } + + /** + * Connects to the remote hostname and port specified as arguments. + * + * @param hostname the remote hostname to connect to + * @param port the remote port to connect to + * + * @throws IOException If an error occurs + */ + protected synchronized void connect(String hostname, int port) + throws IOException + { + connect(InetAddress.getByName(hostname), port); + } + + /** + * Connects to the remote address and port specified as arguments. + * + * @param addr the remote address to connect to + * @param port the remote port to connect to + * + * @throws IOException If an error occurs + */ + protected void connect(InetAddress addr, int port) throws IOException + { + connect(new InetSocketAddress(addr, port), 0); + } + + /** + * Connects to the remote socket address with a specified timeout. + * + * @param address the remote address to connect to + * @param timeout the timeout to use for this connect, 0 means infinite. + * + * @throws IOException If an error occurs + */ + protected synchronized void connect(SocketAddress address, int timeout) + throws IOException + { + if (channel == null) + create(true); + boolean connected = channel.connect(address, timeout); + if (!connected) + throw new SocketTimeoutException("connect timed out"); + + // Using the given SocketAddress is important to preserve + // hostnames given by the caller. + InetSocketAddress addr = (InetSocketAddress) address; + this.address = addr.getAddress(); + this.port = addr.getPort(); + } + + /** + * Binds to the specified port on the specified addr. Note that this addr + * must represent a local IP address. **** How bind to INADDR_ANY? **** + * + * @param addr the address to bind to + * @param port the port number to bind to + * + * @throws IOException if an error occurs + */ + protected synchronized void bind(InetAddress addr, int port) + throws IOException + { + if (channel == null) + create(true); + impl.bind(new InetSocketAddress(addr, port)); + localport = channel.getVMChannel().getLocalAddress().getPort(); + } + + /** + * Starts listening for connections on a socket. The queuelen parameter + * is how many pending connections will queue up waiting to be serviced + * before being accept'ed. If the queue of pending requests exceeds this + * number, additional connections will be refused. + * + * @param queuelen The length of the pending connection queue + * + * @throws IOException If an error occurs + */ + protected synchronized void listen(int queuelen) + throws IOException + { + impl.listen(queuelen); + } + + /** + * Accepts a new connection on this socket and returns in in the + * passed in SocketImpl. + * + * @param impl The SocketImpl object to accept this connection. + */ + protected synchronized void accept(SocketImpl impl) + throws IOException + { + if (channel == null) + create(true); + if (!(impl instanceof PlainSocketImpl)) + throw new IOException("incompatible SocketImpl: " + + impl.getClass().getName()); + PlainSocketImpl that = (PlainSocketImpl) impl; + VMChannel c = channel.getVMChannel().accept(); + that.impl.getState().setChannelFD(c.getState()); + that.channel = new SocketChannelImpl(c); + that.setOption(SO_REUSEADDR, Boolean.TRUE); + // Reset the inherited timeout. + that.setOption(SO_TIMEOUT, Integer.valueOf(0)); + + } + + /** + * Returns the number of bytes that the caller can read from this socket + * without blocking. + * + * @return the number of readable bytes before blocking + * + * @throws IOException if an error occurs + */ + protected int available() throws IOException + { + if (channel == null) + throw new SocketException("not connected"); + return channel.getVMChannel().available(); + } + + /** + * Closes the socket. This will cause any InputStream or OutputStream + * objects for this Socket to be closed as well. + * + * <p> + * Note that if the SO_LINGER option is set on this socket, then the + * operation could block. + * </p> + * + * @throws IOException if an error occurs + */ + protected void close() throws IOException + { + if (impl.getState().isValid()) + impl.close(); + + address = null; + port = -1; + } + + public void sendUrgentData(int data) throws IOException + { + impl.sendUrgentData(data); + } + + /** + * Returns an InputStream object for reading from this socket. This will + * be an instance of SocketInputStream. + * + * @return An input stream attached to the socket. + * + * @exception IOException If an error occurs + */ + protected synchronized InputStream getInputStream() throws IOException + { + if (in == null) + in = new SocketInputStream(); + + return in; + } + + /** + * Returns an OutputStream object for writing to this socket. This will + * be an instance of SocketOutputStream. + * + * @return An output stream attached to the socket. + * + * @exception IOException If an error occurs + */ + protected synchronized OutputStream getOutputStream() throws IOException + { + if (out == null) + out = new SocketOutputStream(); + + return out; + } + + public VMChannel getVMChannel() + { + if (channel == null) + return null; + return channel.getVMChannel(); + } + + /* (non-Javadoc) + * @see java.net.SocketImpl#getInetAddress() + */ + protected InetAddress getInetAddress() + { + if (channel == null) + return null; + + try + { + InetSocketAddress remote = channel.getVMChannel().getPeerAddress(); + if (remote == null) + return null; + // To mimic behavior of the RI the InetAddress instance which was + // used to establish the connection is returned instead of one that + // was created by the native layer (this preserves exact hostnames). + if (address != null) + return address; + + return remote.getAddress(); + } + catch (IOException ioe) + { + return null; + } + } + + /* (non-Javadoc) + * @see java.net.SocketImpl#getLocalPort() + */ + protected int getLocalPort() + { + if (channel == null) + return -1; + try + { + InetSocketAddress local = channel.getVMChannel().getLocalAddress(); + if (local == null) + return -1; + return local.getPort(); + } + catch (IOException ioe) + { + return -1; + } + } + + public InetSocketAddress getLocalAddress() + { + if (channel == null) + return null; + try + { + return channel.getVMChannel().getLocalAddress(); + } + catch (IOException ioe) + { + return null; + } + } + + /* (non-Javadoc) + * @see java.net.SocketImpl#getPort() + */ + protected int getPort() + { + if (channel == null) + return -1; + + try + { + InetSocketAddress remote = channel.getVMChannel().getPeerAddress(); + if (remote == null) + return -1; + return remote.getPort(); + } + catch (IOException ioe) + { + return -1; + } + } + + /** + * This class contains an implementation of <code>InputStream</code> for + * sockets. It in an internal only class used by <code>PlainSocketImpl</code>. + * + * @author Nic Ferrier <nferrier@tapsellferrier.co.uk> + */ + final class SocketInputStream + extends InputStream + { + /** + * Returns the number of bytes available to be read before blocking + */ + public int available() throws IOException + { + return PlainSocketImpl.this.available(); + } + + /** + * This method not only closes the stream, it closes the underlying socket + * (and thus any connection) and invalidates any other Input/Output streams + * for the underlying impl object + */ + public void close() throws IOException + { + PlainSocketImpl.this.close(); + } + + /** + * Reads the next byte of data and returns it as an int. + * + * @return The byte read (as an int) or -1 if end of stream); + * + * @exception IOException If an error occurs. + */ + public int read() throws IOException + { + if (channel == null) + throw new SocketException("not connected"); + while (true) + { + try + { + return channel.getVMChannel().read(); + } + catch (SocketTimeoutException ste) + { + throw ste; + } + catch (InterruptedIOException iioe) + { + // Ignore; NIO may throw this; net io shouldn't + } + } + } + + /** + * Reads up to len bytes of data into the caller supplied buffer starting + * at offset bytes from the start of the buffer + * + * @param buf The buffer + * @param offset Offset into the buffer to start reading from + * @param len The number of bytes to read + * + * @return The number of bytes actually read or -1 if end of stream + * + * @exception IOException If an error occurs. + */ + public int read (byte[] buf, int offset, int len) throws IOException + { + if (channel == null) + throw new SocketException("not connected"); + ByteBuffer b = ByteBuffer.wrap(buf, offset, len); + while (true) + { + try + { + return channel.read(b); + } + catch (SocketTimeoutException ste) + { + throw ste; + } + catch (InterruptedIOException iioe) + { + // Ignored; NIO may throw this; net IO not. + } + } + } + } + + /** + * This class is used internally by <code>PlainSocketImpl</code> to be the + * <code>OutputStream</code> subclass returned by its + * <code>getOutputStream method</code>. It expects only to be used in that + * context. + * + * @author Nic Ferrier <nferrier@tapsellferrier.co.uk> + */ + final class SocketOutputStream + extends OutputStream + { + /** + * This method closes the stream and the underlying socket connection. This + * action also effectively closes any other InputStream or OutputStream + * object associated with the connection. + * + * @exception IOException If an error occurs + */ + public void close() throws IOException + { + PlainSocketImpl.this.close(); + } + + /** + * Writes a byte (passed in as an int) to the given output stream + * + * @param b The byte to write + * + * @exception IOException If an error occurs + */ + public void write(int b) throws IOException + { + if (channel == null) + throw new SocketException("not connected"); + while (true) + { + try + { + channel.getVMChannel().write(b); + return; + } + catch (InterruptedIOException iioe) + { + // Ignored. + } + } + } + + /** + * Writes len number of bytes from the array buf to the stream starting + * at offset bytes into the buffer. + * + * @param buf The buffer + * @param offset Offset into the buffer to start writing from + * @param len The number of bytes to write + * + * @exception IOException If an error occurs. + */ + public void write (byte[] buf, int offset, int len) throws IOException + { + if (channel == null) + throw new SocketException("not connected"); + ByteBuffer b = ByteBuffer.wrap(buf, offset, len); + while (b.hasRemaining()) + { + try + { + if (channel.write(b) == -1) + throw new IOException("channel has been closed"); + } + catch (InterruptedIOException iioe) + { + // Ignored. + } + } + } + } +} |