From: Brian Candler <redmine@...>
Date: 2008-11-12T17:45:09+09:00
Subject: [ruby-core:19868] [Bug #743] Socket.gethostbyname returns odd values

Issue #743 has been updated by Brian Candler.


But:

$ ruby19 -rsocket -e 'p Socket.gethostbyname("localhost")'
["localhost", [], 2, "\x7F\x00\x00\x01"]

(ditto 1.8.6)

If Ruby has been changed so that it doesn't do a reverse DNS lookup when given an IP address to gethostbyname, then I support this change.

(1) It causes all sorts of problems and delays where reverse DNS isn't set up properly, e.g. with druby://x.x.x.x/ where x.x.x.x is an IP address.

I have on many occasions had to do

  Socket.do_not_reverse_lookup = true

just to allow this to work properly.

(2) I found this annoying because I never asked for a reverse DNS lookup, and yet one was forced on me.

(3) I found this surprising, because the stdlib gethostbyname() doesn't do a reverse lookup.

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http://redmine.ruby-lang.org/issues/show/743

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