Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class DatagramSocketImpl - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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java.net
Class DatagramSocketImpl

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

public abstract class DatagramSocketImpl
extends Object
implements SocketOptions

Abstract datagram and multicast socket implementation base class.

Since:: JDK1.1

Field Summary

protected FileDescriptor fd
          The file descriptor object

protected int localPort


Fields inherited from interface java.net.SocketOptions

IP_MULTICAST_IF, SO_BINDADDR, SO_LINGER, SO_RCVBUF, SO_REUSEADDR, SO_SNDBUF, SO_TIMEOUT, TCP_NODELAY

Constructor Summary

DatagramSocketImpl()


Method Summary

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

protected abstract void close()
          Close the socket.

protected abstract void create()
          Creates a datagram socket

protected FileDescriptor getFileDescriptor()
          Get the datagram socket file descriptor

protected int getLocalPort()
          Get the local port.

protected abstract int getTimeToLive()
          Retrieve the TTL (time-to-live) option.

protected abstract byte getTTL()
          Deprecated. use getTimeToLive instead.

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

protected abstract void leave(InetAddress inetaddr)
          Leave the multicast group.

protected abstract int peek(InetAddress i)
          Peek at the packet to see who it is from.

protected abstract void receive(DatagramPacket p)
          Receive the datagram packet.

protected abstract void send(DatagramPacket p)
          Sends a datagram packet.

protected abstract void setTimeToLive(int ttl)
          Set the TTL (time-to-live) option.

protected abstract void setTTL(byte ttl)
          Deprecated. use setTimeToLive instead.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

localPort

protected int localPort

fd

protected FileDescriptor fd

The file descriptor object

Constructor Detail

DatagramSocketImpl

public DatagramSocketImpl()

Method Detail

create

protected abstract void create()
                        throws SocketException

Creates a datagram socket

bind

protected abstract void bind(int lport,
                             InetAddress laddr)
                      throws SocketException

Binds a datagram socket to a local port and address.

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.

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.

receive

protected abstract void receive(DatagramPacket p)
                         throws IOException

Receive the datagram packet.

Parameters:: Packet - Received.

setTTL

protected abstract void setTTL(byte ttl)
                        throws IOException

Deprecated. use setTimeToLive instead.

Set the TTL (time-to-live) option.

Parameters:: TTL - to be set.

getTTL

protected abstract byte getTTL()
                        throws IOException

Deprecated. use getTimeToLive instead.

Retrieve the TTL (time-to-live) option.

setTimeToLive

protected abstract void setTimeToLive(int ttl)
                               throws IOException