java.net
Class DatagramSocketImpl
java.lang.Object
|
+--java.net.DatagramSocketImpl
All Implemented Interfaces:
SocketOptions
This abstract class models a datagram socket implementation. An
actual implementation class would implement these methods, probably
via redirecting them to native code.
Written using on-line Java Platform 1.2 API Specification, as well
as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
Status: Believed complete and correct.
Since:Authors:- Aaron M. Renn (arenn@urbanophile.com)
- Warren Levy <warrenl@cygnus.com>
fd
protected FileDescriptor fd The FileDescriptor object for this object.
localPort
protected int localPort The local port to which this socket is bound
DatagramSocketImpl
public DatagramSocketImpl() Default, no-argument constructor for subclasses to call.
bind
protected void bind(int lport, java.net.InetAddress laddr) This method binds the socket to the specified local port and address.
Parameters:
Throws:
close
protected void close() This methods closes the socket
connect
protected void connect(java.net.InetAddress address, int port) Connects the socket to a host specified by address and port.
Since:Parameters:
Throws:
create
protected void create() Creates a new datagram socket.
Throws:
disconnect
protected void disconnect() Disconnects the socket.
Since:
getFileDescriptor
protected FileDescriptor getFileDescriptor() Returns the FileDescriptor for this socket
getLocalPort
protected int getLocalPort() Returns the local port this socket is bound to
getOption
public Object getOption(int option_id) Returns the current setting of the specified option. The
Object returned will be an Integer for options
that have integer values. For options that are set to on or off, a
Boolean will be returned. The option_id
is one of the defined constants in the superinterface.
Parameters:
Returns:
- The current value of the option
Throws:
getTTL
protected byte getTTL() This method returns the current Time to Live (TTL) setting on this
socket. Use getTimeToLive() instead.
Throws:
getTimeToLive
protected int getTimeToLive() This method returns the current Time to Live (TTL) setting on this
socket.
Throws:
join
protected void join(java.net.InetAddress inetaddr) Causes this socket to join the specified multicast group
Parameters:
Throws:
joinGroup
protected void joinGroup(java.net.SocketAddress mcastaddr, java.net.NetworkInterface netIf) Causes this socket to join the specified multicast group on a specified
device
Since:Parameters:
Throws:
leave
protected void leave(java.net.InetAddress inetaddr) Causes the socket to leave the specified multicast group.
Parameters:
Throws:
leaveGroup
protected void leaveGroup(java.net.SocketAddress mcastaddr, java.net.NetworkInterface netIf) Leaves a multicast group
Since:Parameters:
Throws:
peek
protected int peek(java.net.InetAddress i) Takes a peek at the next packet received in order to retrieve the
address of the sender
Parameters:
Returns:
- The port number of the sender of the packet
Throws:
peekData
protected int peekData(java.net.DatagramPacket p) Takes a peek at the next packet received. This packet is not consumed.
With the next peekData/receive operation this packet will be read again.
Since:Parameters:
Returns:
- The port number of the sender of the packet.
Throws:
receive
protected void receive(java.net.DatagramPacket p) Receives a packet of data from the network Will block until a packet
arrives. The packet info in populated into the passed in
DatagramPacket object.
Parameters:
Throws:
send
protected void send(java.net.DatagramPacket p) Transmits the specified packet of data to the network. The destination
host and port should be encoded in the packet.
Parameters:
Throws:
setOption
public void setOption(int option_id, java.lang.Object val) Sets the specified option on a socket to the passed in object. For
options that take an integer argument, the passed in object is an
Integer. For options that are set to on or off, the
value passed will be a Boolean. The option_id
parameter is one of the defined constants in the superinterface.
Parameters:
Throws:
setTTL
protected void setTTL(byte ttl) Sets the Time to Live (TTL) setting on this socket to the specified
value. Use setTimeToLive(int) instead.
Parameters:
Throws:
setTimeToLive
protected void setTimeToLive(int ttl) Sets the Time to Live (TTL) setting on this socket to the specified
value.
Parameters:
Throws:
Written using on-line Java Platform 1.2 API Specification, as well as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
Status: Believed complete and correct.