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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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