Use libc resolver inside of own DNS code

[vincentbernat]

Hi!

I noticed that mtr is using its own DNS code instead of the libc resolver. This makes some resolution fails. For example, for IP in /etc/hosts, we get no names. The same applies for stuff that should be learned through mDNS.

It seems that some work has already been done, as mentioned in #56. I didn't test the "newdns" branch yet. I open a new issue since #56 is not totally related and is already closed. Is there any reason that this branch cannot be merged yet? How can I help?

[rewolff]

Vincent,
I got fed up with the umpty-th bugreport that would have been avoided if we'd used the libc resolver. So I wrote the "newdns" branch to "show" what that would look like.

In the "newdns" branch it now completely replaces the "olddns" system.

Instead of completely wiping the old dns stuff, for the main branch I would like to have "newdns" be the default, but "olddns" should be a configurable option by passing an argument on the "./configure" command.. (It is such a major change, that I'm afraid to leave people without options if the new stuff doesn't work properly for them.)

You can help by:

• testing newdns
• helping to merge "newdns" into master in a way that I think is acceptable.

[rewolff]

newdns has been merged into master now. Lets hope it gets a bit more testing.