[Pkg-utopia-maintainers] Bug#388864: Stop! Wait!

[Anand Kumria]

Hello,

On 10/4/06, Lennart Poettering <mzqrovna at 0pointer.de> wrote:
> Hi!
>
> I am not that happy with the suggested postinst script.
>
> Two things:
>
> First, please use "mdns4" and "mdns4_minimal" modules instead of
> "mdns" and "mdns_minimal". Why? Because many broken programs (one of

Lennart's suggestions break network setups.

Network A: perfectly setup zeroconf network.

Network B: badly setup corporate site, which uses .local as the last
part of zonecut. That is, resources have names like
mailserver.corporate.local

Lennart's "solution" (in a private email exchange) was to have the
user install/uninstall libnss-mdns as required.

Let's make network B a, say, public wireless access point.

You can't know - in advance - whether or not any particular network is
setup correctly.

> them being "telnet") do host name lookups in a broken way: they first
> try an ipv6 lookup and if that fails fall back to ipv4. In mDNS host

Option 1: break network setups

Option 2: induce a 10 second delay for people who mis-type a resource name.

> Unfortunately do neither Avahi nor Apple Bonjour register both ipv6
> and ipv4 addresses by default.

Incorrect. Apple register zeroconf entries with both A and AAAA
records. Check the bonjour-dev mailing list. From memory, I started a
thread about this issue.

> The ideal line has to look like this:
>
>   hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4

Wrong. Breaks interoperability.

> I strongly suggest following this advice of mine. To my knowledge this
> line is nearly "optimal". I know that Anand Kumria doesn't really
> follow me in my argumentation and added some misleading documentation
> to README.Debian. However, I am very unhappy with this situation.

The documentation is not misleading. You are simply misinformed about
this, and despite my repeated efforts, do not appear to understand the
problem.

> Yes, it is a pity that we cannot add proper out-of-the-box support for
> IPv6 to our zeroconf stack. But humm, that's the situation we have to
> deal with.

No - avahi could register each name with both A and AAAA records. I
haven't checked whether it does or does not. If not, I'd argue it is a
bug.

Anyway, the reason I didn't comment earlier is because your initial
patch was fine. This one isn't.

Anand