Re: IPv6 listen syntax

On Tue, Feb 25, 2014 at 03:53:08PM +1100, Julien Goodwin wrote:
> I've just upgraded my mail box to wheezy, and at the same time enabled
> v6 on it, however I can't figure out what magic syntax is needed for
> perdition to actual listen on v6.
> 
> The package in wheezy is 1.19~rc5-1+b1 which seems like it should have
> v6 support, but it doesn't by default listen on v6, and with what seems
> like the obvious setting:
> bind_address 0.0.0.0,::
> 
> Fails to start.
> 
> Nowhere in the docs can I see any examples with v6 addresses, so I don't
> know if it's perhaps expecting [::] style or something different.
> 
> Any pointers?

Hi Julien,

the (undocumented) syntax is "[::]".

However, unfortunately it seems that in the case of
"0.0.0.0,[::]" there is a bug that prevents perdition
to binding to both addresses.

I am not sure what the bug is, but it is most likely
in the way that vanessa_socket_server_bind() (in vanessa_socket)
calls bind() in the case of "[::]".

A possible work-around for this is to bind to the specific
IPv6 addresses rather than rather than "[::]".

e.g.:

"0.0.0.0,[::1],[::2]"
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