[jboss-jira] [JBoss JIRA] Commented: (JGRP-639) UDP: bind MulticastSocket to multicast address

[Bela Ban (JIRA)]

    [ http://jira.jboss.com/jira/browse/JGRP-639?page=comments#action_12393339 ] 
            
Bela Ban commented on JGRP-639:
-------------------------------

I tried to bind the MulticastSocket to the multicast address and port, but it failed on Linux & MacOs with an exception "cannot assign requested address".  This was done with mcreceive.c, attached to http://jira.jboss.com/jira/browse/JGRP-515.

  /* construct a multicast address structure */
  memset(&mc_addr, 0, sizeof(mc_addr));
  mc_addr.sin_family      = AF_INET;
  mc_addr.sin_addr.s_addr = htonl(INADDR_ANY); // <===
  mc_addr.sin_port        = htons(mc_port);


was changed to

  /* construct a multicast address structure */
  memset(&mc_addr, 0, sizeof(mc_addr));
  mc_addr.sin_family      = AF_INET;
  mc_addr.sin_addr.s_addr = htonl(mc_addr_str); // <===
  mc_addr.sin_port        = htons(mc_port);

This does not work on Windows, MacOs and Linux (2.6.22) !

> UDP: bind MulticastSocket to multicast address
> ----------------------------------------------
>
>                 Key: JGRP-639
>                 URL: http://jira.jboss.com/jira/browse/JGRP-639
>             Project: JGroups
>          Issue Type: Task
>            Reporter: Bela Ban
>         Assigned To: Bela Ban
>            Priority: Minor
>             Fix For: 2.7, 2.4.2, 2.5.2, 2.6.2
>
>
> This doesn't work on Windows, so try-catch it and create new MulticastSocket with a wildcard bind address.
> (2.4.2 is the equivalent of 2.4.1. SP5) - Bela

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