[jboss-jira] [JBoss JIRA] Created: (JGRP-1152) IPv6: IPv4 addresses should be allowed as they will get converted to IPv4 mapped addresses in IPv6

[Bela Ban (JIRA)]

IPv6: IPv4 addresses should be allowed as they will get converted to IPv4 mapped addresses in IPv6
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                 Key: JGRP-1152
                 URL: https://jira.jboss.org/jira/browse/JGRP-1152
             Project: JGroups
          Issue Type: Task
            Reporter: Bela Ban
            Assignee: Bela Ban
             Fix For: 2.10


Currently we log an exception if the stack is IPv6, but we run into IPv4 addresses, such as 192.168.1.5. However, even if the stack is IPv6, IPv4-defined addresses like 192.168.1.5 will get mapped to IPv4 mapped addresses in IPv6, so this should be allowed !

However, class D (multicast) addresses cannot be mapped to IPv6 addresses automatically, so we should still throw an exception here.

So 192.168.1.5 should be valid for both IPv4 and IPv6 stacks !

Invalid combinations include:
- IPv6 addresses (regular or multicast) with an IPv4 stack
- IPv4 class D (*multicast*) addresses with an IPv6 stack

Adjust the logic accordingly

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