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Class java.net.SocketImpl

java.lang.Object
   |
   +----java.net.SocketImpl

public abstract class SocketImpl

extends Object

implements SocketOptions

A "plain" socket implements these methods exactly as described, without attempting to go through a firewall or proxy.

address

The IP address of the remote end of this socket.

fd

The file descriptor object for this socket.

localport

The local port number to which this socket is connected.

port

The port number on the remote host to which this socket is connected.

SocketImpl()

accept(SocketImpl)

Accepts a connection.

available()

Returns the number of bytes that can be read from this socket without blocking.

bind(InetAddress, int)

Binds this socket to the specified port number on the specified host.

close()

Closes this socket.

connect(InetAddress, int)

Connects this socket to the specified port number on the specified host.

connect(String, int)

Connects this socket to the specified port on the named host.

create(boolean)

Creates either a stream or a datagram socket.

getFileDescriptor()

Returns the value of this socket's fd field.

getInetAddress()

Returns the value of this socket's address field.

getInputStream()

Returns an input stream for this socket.

getLocalPort()

Returns the value of this socket's localport field.

getOption(int)

Fetch the value of an option.

getOutputStream()

Returns an output stream for this socket.

getPort()

Returns the value of this socket's port field.

listen(int)

Sets the maximum queue length for incoming connection indications (a request to connect) to the count argument.

setOption(int, Object)

Enable/disable the option specified by optID.

toString()

Returns the address and port of this socket as a String.

 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.

 public SocketImpl()

 protected abstract void create(boolean stream) throws IOException

Creates either a stream or a datagram socket.

Parameters:

stream - if true, create a stream socket; otherwise, create a datagram socket.

Throws: IOException

if an I/O error occurs while creating the socket.

 protected abstract void connect(String host,
                                 int port) throws IOException

Connects this socket to the specified port on the named host.

Parameters:

host - the name of the remote host.

port - the port number.

Throws: IOException

if an I/O error occurs when connecting to the remote host.

 protected abstract void connect(InetAddress address,
                                 int port) throws IOException

Connects this socket to the specified port number on the specified host.

Parameters:

address - the IP address of the remote host.

port - the port number.

Throws: IOException

if an I/O error occurs when attempting a connection.

 protected abstract void bind(InetAddress host,
                              int port) throws IOException

Binds this socket to the specified port number on the specified host.

Parameters:

host - the IP address of the remote host.

port - the port number.

Throws: IOException

if an I/O error occurs when binding this socket.

 protected abstract void listen(int backlog) throws IOException

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.

Parameters:

backlog - the maximum length of the queue.

Throws: IOException

if an I/O error occurs when creating the queue.

 protected abstract void accept(SocketImpl s) throws IOException

Accepts a connection.

Parameters:

s - the accepted connection.

Throws: IOException

if an I/O error occurs when accepting the connection.

 protected abstract InputStream getInputStream() throws IOException

Returns an input stream for this socket.

Returns:

a stream for reading from this socket.

Throws: IOException

if an I/O error occurs when creating the input stream.

 protected abstract OutputStream getOutputStream() throws IOException

Returns an output stream for this socket.

Returns:

an output stream for writing to this socket.

Throws: IOException

if an I/O error occurs when creating the output stream.

 protected abstract int available() throws IOException

Returns the number of bytes that can be read from this socket without blocking.

Returns:

the number of bytes that can be read from this socket without blocking.

Throws: IOException

if an I/O error occurs when determining the number of bytes available.

 protected abstract void close() throws IOException

Closes this socket.

Throws: IOException

if an I/O error occurs when closing this socket.

 protected FileDescriptor getFileDescriptor()

Returns the value of this socket's fd field.

Returns:

the value of this socket's fd field.

See Also:

fd

 protected InetAddress getInetAddress()

Returns the value of this socket's address field.

Returns:

the value of this socket's address field.

See Also:

address

 protected int getPort()

Returns the value of this socket's port field.

Returns:

the value of this socket's port field.

See Also:

port

 protected int getLocalPort()

Returns the value of this socket's localport field.

Returns:

the value of this socket's localport field.

See Also:

localport

 public String toString()

Returns the address and port of this socket as a String.

Returns:

a string representation of this socket.

Overrides:

toString in class Object

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