#913517 hplip: patch to support IPv6

Package:
hplip
Source:
hplip
Description:
HP Linux Printing and Imaging System (HPLIP)
Submitter:
Christopher Martin
Date:
2018-11-25 12:51:11 UTC
Severity:
wishlist
#913517#5
Date:
2018-11-11 19:47:12 UTC
From:
To:
Please see https://bugs.launchpad.net/hplip/+bug/1724089 for the
original report, which includes a patch that adds IPv6 support to
libhpmud.

The patch ensures that libhpmud properly resolves IPv6 addresses and
hostnames. I've tested it against the latest hplip (3.18.10) and it
works well.

Please consider merging it into Debian's package.

Thanks,
Christopher Martin
#913517#10
Date:
2018-11-12 11:40:06 UTC
From:
To:
Having had the experience with dealing with IPv6 support in apt, I am not
convinced it's a good idea. The assumption that

"The system's C library automatically selects the appropriate addresses (for example, it omits ipv6 addresses if there is no ipv6 connectivity)."

is wrong. We've heard a lot of reports from people without _working_
IPv6 for which apt did not work, which forced me to implement a variant
of happy eyeballs.

The patch in question does not try multiple address families in parallel,
nor does it seem to have any time out at all, meaning it will get stuck
indefinitely trying to connect to a broken ipv6 host.
#913517#15
Date:
2018-11-12 20:50:28 UTC
From:
To:
You're no doubt right that there's scope for improvement, and I don't
want to go too far in defending a patch that I didn't write myself.
But I would note that, as I understand matters, the patched hplip
would only use IPv6 if either an IPv6 address was explicitly passed,
or if the hostname resolved to an IPv6 address (say in /etc/hosts -
which is what I tested). If that results in problems, then the system
is arguably misconfigured elsewhere. These are (presumably most of the
time) local network printers we're dealing with, so the state of their
IPv6 support is known and controllable.

One possibility might be to test matters via an upload to experimental
after the next release and watch for reports of breakage.

Cheers,
Christopher Martin
#913517#20
Date:
2018-11-25 12:47:59 UTC
From:
To:
Le dimanche, 11 novembre 2018, 20.47:12 h CET Christopher Martin a écrit :

This is really fondamentally something of upstream's realm, and (also given
the remarks) I am not going to carry such a patch as distribution-specific
patch, sorry.

Hereby marking as wontfix to make this decision clear.

Cheers,
    OdyX