Re: [Lprng-devel] IPv6 issue

[Joe F. <jf...@fe...>]

Well, if my time allows...
I'm pretty busy right now, upgrading my Linux box, traveling, etc., but 
I'll see if I can get at least the basics done.
I think I don't have the latest code, I've been using the last lprng 
code (3.8.35) that Slackware provided before they dropped it from the 
distro. But my guess is that the IPv6-related code hasn't changed much 
if at all.

 From what I've seen so far, while the code has some IPv6-related stuff 
with #ifdefined IPV6, it doesn't use IPv6 structures.
For example, it uses struct sockaddr_in, even if the family is set to 
AF_INET6, which of course doesn't work (IPv6 needs struct sockaddr_in6.)
The binding to 0.0.0.0 means it is using INADDR_ANY, for IPv6 it needs 
to use in6addr_any, etc. etc.
Luckily, listening/binding seems to be done in only a couple of places, 
in common/linksupport.c and common/monitor.c.

-Joe

On 9/10/2013 3:10 AM, walter harms wrote:
> hi Jow,
> sorry for the delay. thx for the test.
>
> are you willing to take this further and fix this ?
>
> re,
>   wh
>
>
> Am 08.09.2013 22:15, schrieb Joe Feise:
>> Checking the issue with IPv6 support, it is not a surprise that it
>> fails: lpd tries to bind to the IPv4 port.
>> Running lpd with -D network+4 shows
>> "Link_listen: bind to IP '0.0.0.0' port 515"
>> That's an IPv4 address.
>> For IPv6, the "listen on all interfaces" address is "::".
>> I've tested this on a dual-stack machine, with both IPv4 and IPv6
>> interfaces.
>> Looks as if getting the interface to listen on doesn't check for IPv6.
>>
>> -Joe
>>
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