java.net
Class SocketImpl
- SocketOptions
This abstract class serves as the parent class for socket implementations.
The implementation class serves an intermediary to native routines that
perform system specific socket operations.
A default implementation is provided by the system, but this can be
changed via installing a
SocketImplFactory (through a call
to the static method
Socket.setSocketImplFactory). A
subclass of
Socket can also pass in a
SocketImpl
to the
Socket(SocketImpl) constructor to use an
implementation different from the system default without installing
a factory.
protected InetAddress | address- The address of the remote end of the socket connection
|
protected FileDescriptor | fd- A FileDescriptor object representing this socket connection.
|
protected int | localport- The port number the socket is bound to locally
|
protected int | port- The port number of the remote end of the socket connection
|
IP_MULTICAST_IF, IP_MULTICAST_IF2, IP_MULTICAST_LOOP, IP_TOS, SO_BINDADDR, SO_BROADCAST, SO_KEEPALIVE, SO_LINGER, SO_OOBINLINE, SO_RCVBUF, SO_REUSEADDR, SO_SNDBUF, SO_TIMEOUT, TCP_NODELAY |
SocketImpl()- Default, no-argument constructor for use by subclasses.
|
protected abstract void | accept(SocketImpl s)- Accepts a connection on this socket.
|
protected abstract int | available()- Returns the number of bytes that the caller can read from this socket
without blocking.
|
protected abstract void | bind(InetAddress host, int port)- Binds to the specified port on the specified addr.
|
protected abstract void | close()- Closes the socket.
|
protected abstract void | connect(String host, int port)- Connects to the remote hostname and port specified as arguments.
|
protected abstract void | connect(InetAddress host, int port)- Connects to the remote address and port specified as arguments.
|
protected abstract void | connect(SocketAddress address, int timeout)- Connects to the socket to the host specified in address.
|
protected abstract void | create(boolean stream)- Creates a new socket that is not bound to any local address/port and
is not connected to any remote address/port.
|
protected FileDescriptor | getFileDescriptor()- Returns the FileDescriptor objects for this socket.
|
protected InetAddress | getInetAddress()- Returns the remote address this socket is connected to
|
protected abstract InputStream | getInputStream()- Returns an
InputStream object for reading from this socket.
|
protected int | getLocalPort()- Returns the local port this socket is bound to
|
protected abstract OutputStream | getOutputStream()- Returns an
OutputStream object for writing to this socket
|
protected int | getPort()- Returns the remote port this socket is connected to
|
protected abstract void | listen(int backlog)- Starts listening for connections on a socket.
|
protected abstract void | sendUrgentData(int data)- Sends one byte of urgent data to the socket.
|
protected void | shutdownInput()- Shut down the input side of this socket.
|
protected void | shutdownOutput()- Shut down the output side of this socket.
|
protected boolean | supportsUrgentData()- Returns true or false when this socket supports sending urgent data
or not.
|
String | toString()- Returns a
String representing the remote host and port of
this socket.
|
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
address
protected InetAddress address
The address of the remote end of the socket connection
fd
protected FileDescriptor fd
A FileDescriptor object representing this socket connection.
localport
protected int localport
The port number the socket is bound to locally
port
protected int port
The port number of the remote end of the socket connection
SocketImpl
public SocketImpl()
Default, no-argument constructor for use by subclasses.
accept
protected abstract void accept(SocketImpl s)
throws IOException Accepts a connection on this socket.
s - The implementation object for the accepted connection.
available
protected abstract int available()
throws IOException Returns the number of bytes that the caller can read from this socket
without blocking.
- The number of readable bytes before blocking
bind
protected abstract void bind(InetAddress host,
int port)
throws IOException Binds to the specified port on the specified addr. Note that this addr
must represent a local IP address.
Note that it is unspecified how to bind to all interfaces on the localhost
(INADDR_ANY).
host - The address to bind toport - The port number to bind to
close
protected abstract void close()
throws IOException Closes the socket. This will normally cause any resources, such as the
InputStream, OutputStream and associated file descriptors to be freed.
Note that if the SO_LINGER option is set on this socket, then the
operation could block.
connect
protected abstract void connect(String host,
int port)
throws IOException Connects to the remote hostname and port specified as arguments.
host - The remote hostname to connect toport - The remote port to connect to
connect
protected abstract void connect(InetAddress host,
int port)
throws IOException Connects to the remote address and port specified as arguments.
host - The remote address to connect toport - The remote port to connect to
connect
protected abstract void connect(SocketAddress address,
int timeout)
throws IOException Connects to the socket to the host specified in address. This
method blocks until successful connected or the timeout occurs.
A timeout of zero means no timout.
address - Data of remote hosttimeout - time to wait to stop connecting
create
protected abstract void create(boolean stream)
throws IOException Creates a new socket that is not bound to any local address/port and
is not connected to any remote address/port. This will be created as
a stream socket if the stream parameter is true, or a datagram socket
if the stream parameter is false.
stream - true for a stream socket, false for a datagram socket
getInputStream
protected abstract InputStream getInputStream()
throws IOException Returns an InputStream object for reading from this socket.
- An
InputStream for reading from this socket.
getLocalPort
protected int getLocalPort()
Returns the local port this socket is bound to
getPort
protected int getPort()
Returns the remote port this socket is connected to
listen
protected abstract void listen(int backlog)
throws IOException Starts listening for connections on a socket. The backlog 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.
backlog - The length of the pending connection queue
sendUrgentData
protected abstract void sendUrgentData(int data)
throws IOException Sends one byte of urgent data to the socket.
data - The byte to send, the low eight bits of it
shutdownInput
protected void shutdownInput()
throws IOException Shut down the input side of this socket. Subsequent reads will
return end-of-file.
shutdownOutput
protected void shutdownOutput()
throws IOException Shut down the output side of this socket. Subsequent writes will
fail with an IOException.
supportsUrgentData
protected boolean supportsUrgentData()
Returns true or false when this socket supports sending urgent data
or not.
- true if the socket implementation supports sending urgent data,
false otherwise
toString
public String toString()
Returns a String representing the remote host and port of
this socket.
- toString in interface Object
- A
String for this socket.
SocketImpl.java -- Abstract socket implementation class
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003
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.