File	Doc	Category	Size	Date	Package
SocketImpl.java	API Doc	Java SE 6 API	11398	Tue Jun 10 00:25:42 BST 2008	java.net

SocketImpl

• java.lang.Object

Fields Summary
Socket	socket The actual Socket object.
ServerSocket	serverSocket
protected FileDescriptor	fd The file descriptor object for this socket.
protected InetAddress	address The IP address of the remote end of this socket.
protected int	port The port number on the remote host to which this socket is connected.
protected int	localport The local port number to which this socket is connected.

Constructors Summary

Methods Summary
protected abstract void	accept(java.net.SocketImpl s) Accepts a connection. param s the accepted connection. exception IOException if an I/O error occurs when accepting the connection.
protected abstract int	available() 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 void	bind(java.net.InetAddress host, int port) Binds this socket to the specified local IP address and port number. param host an IP address that belongs to a local interface. param port the port number. exception IOException if an I/O error occurs when binding this socket.
protected abstract void	close() Closes this socket. exception IOException if an I/O error occurs when closing this socket.
protected abstract void	connect(java.lang.String host, int port) 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(java.net.InetAddress address, int port) 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(java.net.SocketAddress address, int timeout) Connects this socket to the specified port number on the specified host. A timeout of zero is interpreted as an infinite timeout. The connection will then block until established or an error occurs. param address the Socket address of the remote host. param timeout the timeout value, in milliseconds, or zero for no timeout. exception IOException if an I/O error occurs when attempting a connection. since 1.4
protected abstract void	create(boolean stream) Creates either a stream or a datagram socket. param stream if true, create a stream socket; otherwise, create a datagram socket. exception IOException if an I/O error occurs while creating the socket.
protected java.io.FileDescriptor	getFileDescriptor() Returns the value of this socket's fd field. return the value of this socket's fd field. see java.net.SocketImpl#fd return fd;
protected java.net.InetAddress	getInetAddress() Returns the value of this socket's address field. return the value of this socket's address field. see java.net.SocketImpl#address return address;
protected abstract java.io.InputStream	getInputStream() 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 int	getLocalPort() Returns the value of this socket's localport field. return the value of this socket's localport field. see java.net.SocketImpl#localport return localport;
protected abstract java.io.OutputStream	getOutputStream() 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 int	getPort() Returns the value of this socket's port field. return the value of this socket's port field. see java.net.SocketImpl#port return port;
java.net.ServerSocket	getServerSocket() return serverSocket;
java.net.Socket	getSocket() return socket;
protected abstract void	listen(int backlog) Sets the maximum queue length for incoming connection indications (a request to connect) to the count 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.
void	reset() address = null; port = 0; localport = 0;
protected abstract void	sendUrgentData(int data) Send one byte of urgent data on the socket. The byte to be sent is the low eight bits of the parameter param data The byte of data to send exception IOException if there is an error sending the data. since 1.4
protected void	setPerformancePreferences(int connectionTime, int latency, int bandwidth) Sets performance preferences for this socket. Sockets use the TCP/IP protocol by default. Some implementations may offer alternative protocols which have different performance characteristics than TCP/IP. This method allows the application to express its own preferences as to how these tradeoffs should be made when the implementation chooses from the available protocols. Performance preferences are described by three integers whose values indicate the relative importance of short connection time, low latency, and high bandwidth. The absolute values of the integers are irrelevant; in order to choose a protocol the values are simply compared, with larger values indicating stronger preferences. Negative values represent a lower priority than positive values. If the application prefers short connection time over both low latency and high bandwidth, for example, then it could invoke this method with the values (1, 0, 0). If the application prefers high bandwidth above low latency, and low latency above short connection time, then it could invoke this method with the values (0, 1, 2). By default, this method does nothing, unless it is overridden in a a sub-class. param connectionTime An int expressing the relative importance of a short connection time param latency An int expressing the relative importance of low latency param bandwidth An int expressing the relative importance of high bandwidth since 1.5 /* Not implemented yet */
void	setServerSocket(java.net.ServerSocket soc) this.serverSocket = soc;
void	setSocket(java.net.Socket soc) this.socket = soc;
protected void	shutdownInput() Places the input stream for this socket at "end of stream". Any data sent to this socket is acknowledged and then silently discarded. If you read from a socket input stream after invoking shutdownInput() on the socket, the stream will return EOF. exception IOException if an I/O error occurs when shutting down this socket. see java.net.Socket#shutdownOutput() see java.net.Socket#close() see java.net.Socket#setSoLinger(boolean, int) since 1.3 throw new IOException("Method not implemented!");
protected void	shutdownOutput() Disables the output stream for this socket. For a TCP socket, any previously written data will be sent followed by TCP's normal connection termination sequence. If you write to a socket output stream after invoking shutdownOutput() on the socket, the stream will throw an IOException. exception IOException if an I/O error occurs when shutting down this socket. see java.net.Socket#shutdownInput() see java.net.Socket#close() see java.net.Socket#setSoLinger(boolean, int) since 1.3 throw new IOException("Method not implemented!");
protected boolean	supportsUrgentData() Returns whether or not this SocketImpl supports sending urgent data. By default, false is returned unless the method is overridden in a sub-class return true if urgent data supported see java.net.SocketImpl#address since 1.4 return false; // must be overridden in sub-class
public java.lang.String	toString() Returns the address and port of this socket as a String. return a string representation of this socket. return "Socket[addr=" + getInetAddress() + ",port=" + getPort() + ",localport=" + getLocalPort() + "]";