Multicast (Apache Tomcat 6.0.51 API Documentation)
Keywords: org.apache.tomcat.jni.Multicast class

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## org.apache.tomcat.jni
Class Multicast

    java.lang.Object
      org.apache.tomcat.jni.Multicast

    public class Multicast

extends java.lang.Object

Multicast

Author:
  Mladen Turk

Constructor Summary
`Multicast()`

Method Summary
`static int` | `hops(long sock, int ttl)` Set the Multicast Time to Live (ttl) for a multicast transmission.
`static int` | `join(long sock, long join, long iface, long source)` Join a Multicast Group
`static int` | `leave(long sock, long addr, long iface, long source)` Leave a Multicast Group.
`static int` | `loopback(long sock, boolean opt)` Toggle IP Multicast Loopback
`static int` | `ointerface(long sock, long iface)` Set the Interface to be used for outgoing Multicast Transmissions.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### Multicast

    public Multicast()

Method Detail

### join

    public static int join(long sock,
                           long join,
                           long iface,
                           long source)

  Join a Multicast Group

  Parameters:
    `sock` - The socket to join a multicast group
    `join` - The address of the multicast group to join
    `iface` - Address of the interface to use. If NULL is passed, the default multicast interface will be used. (OS Dependent)
    `source` - Source Address to accept transmissions from (non-NULL implies Source-Specific Multicast)

### leave

    public static int leave(long sock,
                            long addr,
                            long iface,
                            long source)

  Leave a Multicast Group. All arguments must be the same as apr_mcast_join.

  Parameters:
    `sock` - The socket to leave a multicast group
    `addr` - The address of the multicast group to leave
    `iface` - Address of the interface to use. If NULL is passed, the default multicast interface will be used. (OS Dependent)
    `source` - Source Address to accept transmissions from (non-NULL implies Source-Specific Multicast)

### hops

    public static int hops(long sock,
                           int ttl)

  Set the Multicast Time to Live (ttl) for a multicast transmission.

  Parameters:
    `sock` - The socket to set the multicast ttl
    `ttl` - Time to live to Assign. 0-255, default=1
    Remark : If the TTL is 0, packets will only be seen by sockets on the local machine, and only when multicast loopback is enabled.

### loopback

    public static int loopback(long sock,
                               boolean opt)

  Toggle IP Multicast Loopback

  Parameters:
    `sock` - The socket to set multicast loopback
    `opt` - false=disable, true=enable

### ointerface

    public static int ointerface(long sock,
                                 long iface)

  Set the Interface to be used for outgoing Multicast Transmissions.

  Parameters:
    `sock` - The socket to set the multicast interface on
    `iface` - Address of the interface to use for Multicast

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