[jboss-as7-dev] ipv6 "usability" question

[Brian Stansberry]

On 5/25/12 9:18 AM, David M. Lloyd wrote:
> The JDK IP address parser will accept [], I believe, but it's not a
> valid address.

Yes; the reason -b [::1] works is because InetAddress.getByName("[::1]") 
works. It's not a case of the AS exerting effort to allow it to work; 
we'd have to add code to make it not work.

> I'd say that we should allow [] but not recommend it.

Agreed. If the AS stops supporting it we will break people who for 
whatever reason have needlessly added the []. If we do that we need to 
have a good explanation (almost a FAQ) as to why we made that choice.

> For tools, it's a question of parsing the IP address (getAddressByName
> should do it), determining if it's a nameless IPv6 address, and if so,
> escaping it; not too onerous a burden in my opinion.
>
> On 05/25/2012 06:47 AM, Max Rydahl Andersen wrote:
>> so in your future using [:::1] should error if not used in a url ?
>>
>> That is what ssh command line seem to be doing btw
>>
>> /max
>>
>> On May 25, 2012, at 13:43 , Pavel Janousek wrote:
>>
>>> Hi Max,
>>>
>>> I really hate to use [xyz] anywhere I'd like to use literal IPv6 address. IP address should be always without brackets! On the other hand, URL need brackets because URL port (+ password) delimiter is the same as IPv6 IP's group delimiter - in this case [] are needed in _every_ case, but again - only when we are using _literal_ IPv6 address, not name. In an URL brackets are important to use because ambiguity can be occurred very easily.
>>>
>>> I hate the present (only one) possible option as ./standalone.sh ... -b [IPv6] -bmanagement=IPv6 because it is really bad and at least unprofessional... in every case we'd like to specify literal IP address, we should do this _only_ without bracket, because this is only one possible text representation...
>>>
>>> I guess, my thought isn't accepted by majority up to now (as we can see in present AS7), but I'd like to bet future is mine...:)
>>>
>>> Pavel
>>>
>>> ----- Original Message -----
>>>> From: "Max Rydahl Andersen"<max.andersen at redhat.com>
>>>> To: "jboss-as7-dev at lists.jboss.org Development"<jboss-as7-dev at lists.jboss.org>
>>>> Sent: Friday, May 25, 2012 12:30:44 PM
>>>> Subject: [jboss-as7-dev] ipv6 "usability" question
>>>>
>>>> Hi guys,
>>>>
>>>> Trying to be sure our tools actually can connect/work with ipv6
>>>> enabled servers we're are hitting a bit of a snag.
>>>>
>>>> Is it expected that clients unescapes/escapes ipv6 addresses or is
>>>> :::1 and [:::1] considered equivalent ?
>>>>
>>>> i.e. do code need to add []'s when constructing urls, and remove []'s
>>>> when passing it to things that just need an address ?
>>>>
>>>> Just wondering if we could tells users to put [::1] into hostname
>>>> fields if they want to use ipv6 - then we don't need to add all this
>>>> escaping/unescaping
>>>> for ipv6 in the UI layer of tools.
>>>>
>>>> /max
>>>>
>>>>
>>>>
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>>>>
>>
>>
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>
>


-- 
Brian Stansberry
Principal Software Engineer
JBoss by Red Hat