org.apache.tomcat.jni

## Class Multicast

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

-     public class Multicast
      extends Object

  Multicast
  Author:
    Mladen Turk

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `Multicast()`

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `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)
      Returns:
        the operation status

    - #### 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)
      Returns:
        the operation status

    - #### 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.
      Returns:
        the operation status

    - #### 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
      Returns:
        the operation status

    - #### 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
      Returns:
        the operation status

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