[jira] [Comment Edited] (CAMEL-6563) camen-netty - unable to consume on UDP multicast addresses

["Sam Patel (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CAMEL-6563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13712774#comment-13712774 ] 

Sam Patel edited comment on CAMEL-6563 at 7/18/13 8:31 PM:
-----------------------------------------------------------

To listen for UDP multicast addresses, I think the code may have to do some different logic when binding to the IP address.  I found this link on the web which may have code that is relevant (http://web.archiveorange.com/archive/v/z6Mf9AWgO1zZ4z3SHvGs)

The camel-netty code currently does this for UDP non-mulicast address (e.g. localhost).  This is either in the SingleUDPNettyServerBootstrapFactory.java source file.

Channel channel = connectionlessBootstrap.bind(hostAddress);

I think for UDP multicast address (e.g. 225.1.1.1), it needs to join a group on a particular network interface.  It might looks something like this:

DatagramChannel channel = (DatagramChannel)connectionlessBootstrap.bind(hostAddress);
String networkInterface = configuration.getNetworkInterface() == null ? LOOPBACK_INTERFACE : configuration.getNetworkInterface();
NetworkInterface multicastNetworkInterface = NetworkInterface.getByName(networkInterface);
channel.joinGroup(hostAddress, multicastNetworkInterface);

                
      was (Author: samel):
    To listen for UDP multicast addresses, I think the code may have to do some different logic when binding to the IP address.  

In the typical case, the code currently does this for UDP non-mulicast:

Channel channel = connectionlessBootstrap.bind(hostAddress);

I think for UDP multicast, it needs to join a group on a particular network interface.  It might looks something like this:



                  
> camen-netty - unable to consume on UDP multicast addresses
> ----------------------------------------------------------
>
>                 Key: CAMEL-6563
>                 URL: https://issues.apache.org/jira/browse/CAMEL-6563
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-netty
>    Affects Versions: 2.11.0
>         Environment: Karaf 2.3.1
> Java 7 
> Ubuntu 12.04 (64 bit)
>            Reporter: Sam Patel
>            Priority: Minor
>
> When using a route to listen to UDP multicast address , no messages seem to get consumed. No exceptions are observed. 
> Multicast address is defined as addresses in the range of 224.0.0.0 through 239.255.255.255 (http://en.wikipedia.org/wiki/Multicast_address)
> Input was simple string (e.g. "Test String")
> Example Route:
> <route>
>      <from uri="netty:udp://225.1.1.1:8001?allowDefaultCodec=false&sync=false&broadcast=true"/>
> </route>
> Found an old topic in the user discussion forum that seems related.  Did not find any unit tests in the Camel source code exercising this behavior.  (http://camel.465427.n5.nabble.com/camel-netty-and-multicast-tt4638622.html)

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