dns resolution fails in UI with only IPv6-recursive nameservers

[Lennie]

Binary package hint: mtr

While using Jaunty/mtr-tiny and mtr version 0.75-2 I noticed a problem.

If the only recursive nameservers (the nameserver setting in /etc/resolv.conf) that are available are IPv6, the dns resolution in the ncurses ui fails.

In the --report mode it works.

I installed the mtr package and the same happend.

My guess is, when it's using --report it will use the system library which works with IPv4 and IPv6 nameserver settings.

In the case of the ncurses or grafical ui, mtr(-tiny) tries to do it itself with a non-blocking method and only seems to understand IPv4 nameservers.

I looked at some sourcecode, at first glance it seems to add only IPv4 address to the list of recursive nameservers in dns_open.

That could be the place were it goes wrong. I tried to change what seemed wrong at first glance, but that didn't help.

I subscribed to the mtr-mailinglist at the upstream-source (bitwizard I think it was) but their was no subscribe-confirmation so I assumed it failed. As I'm on Ubuntu using a Ubuntu package, I'm reporting it here, not Debian directly.

Hope this helps.

[Antonio Querubin (aaq)]

Patch is available:

https://bugs.launchpad.net/mtr/+bug/752583/comments/5