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Java Source | 1998-03-20 | 6.3 KB | 200 lines |
- /*
- * @(#)SocketImpl.java 1.24 98/03/18
- *
- * Copyright 1995-1997 by Sun Microsystems, Inc.,
- * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
- * All rights reserved.
- *
- * This software is the confidential and proprietary information
- * of Sun Microsystems, Inc. ("Confidential Information"). You
- * shall not disclose such Confidential Information and shall use
- * it only in accordance with the terms of the license agreement
- * you entered into with Sun.
- */
-
- package java.net;
-
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.OutputStream;
- import java.io.FileDescriptor;
-
- /**
- * The abstract class <code>SocketImpl</code> is a common superclass
- * of all classes that actually implement sockets. It is used to
- * create both client and server sockets.
- * <p>
- * A "plain" socket implements these methods exactly as
- * described, without attempting to go through a firewall or proxy.
- *
- * @author unascribed
- * @version 1.24, 03/18/98
- * @since JDK1.0
- */
- public abstract class SocketImpl implements SocketOptions {
- /**
- * The file descriptor object for this socket.
- */
- protected FileDescriptor fd;
-
- /**
- * The IP address of the remote end of this socket.
- */
- protected InetAddress address;
-
- /**
- * The port number on the remote host to which this socket is connected.
- */
- protected int port;
-
- /**
- * The local port number to which this socket is connected.
- */
- protected int localport;
-
- /**
- * Creates either a stream or a datagram socket.
- *
- * @param stream if <code>true</code>, create a stream socket;
- * otherwise, create a datagram socket.
- * @exception IOException if an I/O error occurs while creating the
- * socket.
- */
- protected abstract void create(boolean stream) throws IOException;
-
- /**
- * Connects this socket to the specified port on the named host.
- *
- * @param host the name of the remote host.
- * @param port the port number.
- * @exception IOException if an I/O error occurs when connecting to the
- * remote host.
- */
- protected abstract void connect(String host, int port) throws IOException;
-
- /**
- * Connects this socket to the specified port number on the specified host.
- *
- * @param address the IP address of the remote host.
- * @param port the port number.
- * @exception IOException if an I/O error occurs when attempting a
- * connection.
- */
- protected abstract void connect(InetAddress address, int port) throws IOException;
-
- /**
- * Binds this socket to the specified port number on the specified host.
- *
- * @param host the IP address of the remote host.
- * @param port the port number.
- * @exception IOException if an I/O error occurs when binding this socket.
- */
- protected abstract void bind(InetAddress host, int port) throws IOException;
-
- /**
- * Sets the maximum queue length for incoming connection indications
- * (a request to connect) to the <code>count</code> argument. If a
- * connection indication arrives when the queue is full, the
- * connection is refused.
- *
- * @param backlog the maximum length of the queue.
- * @exception IOException if an I/O error occurs when creating the queue.
- */
- protected abstract void listen(int backlog) throws IOException;
-
- /**
- * Accepts a connection.
- *
- * @param s the accepted connection.
- * @exception IOException if an I/O error occurs when accepting the
- * connection.
- */
- protected abstract void accept(SocketImpl s) throws IOException;
-
- /**
- * Returns an input stream for this socket.
- *
- * @return a stream for reading from this socket.
- * @exception IOException if an I/O error occurs when creating the
- * input stream.
- */
- protected abstract InputStream getInputStream() throws IOException;
-
- /**
- * Returns an output stream for this socket.
- *
- * @return an output stream for writing to this socket.
- * @exception IOException if an I/O error occurs when creating the
- * output stream.
- */
- protected abstract OutputStream getOutputStream() throws IOException;
-
- /**
- * Returns the number of bytes that can be read from this socket
- * without blocking.
- *
- * @return the number of bytes that can be read from this socket
- * without blocking.
- * @exception IOException if an I/O error occurs when determining the
- * number of bytes available.
- */
- protected abstract int available() throws IOException;
-
- /**
- * Closes this socket.
- *
- * @exception IOException if an I/O error occurs when closing this socket.
- */
- protected abstract void close() throws IOException;
-
- /**
- * Returns the value of this socket's <code>fd</code> field.
- *
- * @return the value of this socket's <code>fd</code> field.
- * @see java.net.SocketImpl#fd
- */
- protected FileDescriptor getFileDescriptor() {
- return fd;
- }
-
- /**
- * Returns the value of this socket's <code>address</code> field.
- *
- * @return the value of this socket's <code>address</code> field.
- * @see java.net.SocketImpl#address
- */
- protected InetAddress getInetAddress() {
- return address;
- }
-
- /**
- * Returns the value of this socket's <code>port</code> field.
- *
- * @return the value of this socket's <code>port</code> field.
- * @see java.net.SocketImpl#port
- */
- protected int getPort() {
- return port;
- }
-
- /**
- * Returns the value of this socket's <code>localport</code> field.
- *
- * @return the value of this socket's <code>localport</code> field.
- * @see java.net.SocketImpl#localport
- */
- protected int getLocalPort() {
- return localport;
- }
-
- /**
- * Returns the address and port of this socket as a <code>String</code>.
- *
- * @return a string representation of this socket.
- */
- public String toString() {
- return "Socket[addr=" + getInetAddress() +
- ",port=" + getPort() + ",localport=" + getLocalPort() + "]";
- }
- }
-