How can i get absolute domains?

Question

How can i get absolute domains?

kotyara1005 opened this issue 8 years ago · 5 comments

When i use dig i obtain absolute domain names:

;; ANSWER SECTION:
google.com. 5 IN NS ns1.google.com.
google.com. 5 IN NS ns3.google.com.
google.com. 5 IN NS ns4.google.com.
google.com. 5 IN NS ns2.google.com.

But aiodns gives me relative domains:
[ares_query_ns_result(host='ns3.google.com', ttl=None), ares_query_ns_result(host='ns4.google.com', ttl=None), ares_query_ns_result(host='ns2.google.com', ttl=None), ares_query_ns_result(host='ns1.google.com', ttl=None)]

Is the way to get true data exists?

Answer 1 · 2017-04-21T14:50:32.000Z

I'm not sure I understand, aiodns gives you the same thing (module the TTL, which I think I made available in a newer pycares release) so how would you like to see the results?

Answer 2 · 2017-04-22T23:04:53.000Z

I mean that aiodns or pycares strip trailing dot in domain name. It's not right, "ns1.google.com" and "ns1.google.com." are different domains.

Answer 3 · 2017-05-06T08:40:45.000Z

The dot is not stripped by those libraries, it must be c-ares, I guess. You can try to compile c-ares and use their adig tool to see what it returns exactly.

Answer 4 · 2017-05-06T08:44:44.000Z

@ioc32 perhaps you can help here mate?

Answer 5 · 2017-05-08T08:11:55.000Z

It looks like aiodns/c-ares simply return unqualified domain names. This is, they return a domain that it's not fully qualified or complete up to the top of the DNS namespace (the root, "."). ns1.google.com and ns1.google.com. don't have to be the same domain necessarily, but they will indeed be the same pretty much most of the time. For most user oriented DNS tools it is safe to strip the last zone separator ("."). If the fact that labels returned by aiodns are unqualified is a problem and you need to programmatically fully qualify them in the standard DNS root, use your favorite DNS library to canonicalise them before querying them*. If you simply need to print them (you're not parsing the string and turning it into a domain object) perhaps appending a trailing dot would suffice? * I don't know what's your use case so I can't offer much advice

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On May 6, 2017 10:44 AM, "Saúl Ibarra Corretgé" ***@***.***> wrote: @ioc32 <https://github.com/ioc32> perhaps you can help here mate? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#28 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABGQrUTe3O8u07WTXyxu1QmQmU4YfyWoks5r3DL8gaJpZM4NEUn4> .