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Class java.net.DatagramSocketImpl

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

public abstract class DatagramSocketImpl
extends Object
implements SocketOptions
Abstract datagram and multicast socket implementation base class.


Variable Index

 o fd
The file descriptor object
 o localPort

Constructor Index

 o DatagramSocketImpl()

Method Index

 o bind(int, InetAddress)
Binds a datagram socket to a local port and address.
 o close()
Close the socket.
 o create()
Creates a datagram socket
 o getFileDescriptor()
Get the datagram socket file descriptor
 o getLocalPort()
Get the local port.
 o getOption(int)
Fetch the value of an option.
 o getTTL()
Retrieve the TTL (time-to-live) option.
 o join(InetAddress)
Join the multicast group.
 o leave(InetAddress)
Leave the multicast group.
 o peek(InetAddress)
Peek at the packet to see who it is from.
 o receive(DatagramPacket)
Receive the datagram packet.
 o send(DatagramPacket)
Sends a datagram packet.
 o setOption(int, Object)
Enable/disable the option specified by optID.
 o setTTL(byte)
Set the TTL (time-to-live) option.

Variables

 o localPort
 protected int localPort
 o fd
 protected FileDescriptor fd
The file descriptor object

Constructors

 o DatagramSocketImpl
 public DatagramSocketImpl()

Methods

 o create
 protected abstract void create() throws SocketException
Creates a datagram socket

 o bind
 protected abstract void bind(int lport,
                              InetAddress laddr) throws SocketException
Binds a datagram socket to a local port and address.

 o send
 protected abstract void send(DatagramPacket p) throws IOException
Sends a datagram packet. The packet contains the data and the destination address to send the packet to.

Parameters:
packet - to be sent.
 o peek
 protected abstract int peek(InetAddress i) throws IOException
Peek at the packet to see who it is from.

Parameters:
return - the address which the packet came from.
 o receive
 protected abstract void receive(DatagramPacket p) throws IOException
Receive the datagram packet.

Parameters:
Packet - Received.
 o setTTL
 protected abstract void setTTL(byte ttl) throws IOException
Set the TTL (time-to-live) option.

Parameters:
TTL - to be set.
 o getTTL
 protected abstract byte getTTL() throws IOException
Retrieve the TTL (time-to-live) option.

 o join
 protected abstract void join(InetAddress inetaddr) throws IOException
Join the multicast group.

Parameters:
multicast - address to join.
 o leave
 protected abstract void leave(InetAddress inetaddr) throws IOException
Leave the multicast group.

Parameters:
multicast - address to leave.
 o close
 protected abstract void close()
Close the socket.

 o getLocalPort
 protected int getLocalPort()
Get the local port.

 o getFileDescriptor
 protected FileDescriptor getFileDescriptor()
Get the datagram socket file descriptor


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