[Bug 28051] SRV lookups returning a CNAME (e.g. facebook) break login

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28051

--- Comment #22 from Simon McVittie <simon.mcvittie at collabora.co.uk> 2010-09-10 05:36:49 PDT ---
RFC 2782 says:

   A SRV-cognizant client SHOULD use this procedure to locate a list of
   servers and connect to the preferred one:

        Do a lookup for QNAME=_service._protocol.target, QCLASS=IN,
        QTYPE=SRV.

        If the reply is NOERROR, ANCOUNT>0 and there is at least one
        SRV RR which specifies the requested Service and Protocol in
        the reply:

            [...]

        else

            Do a lookup for QNAME=target, QCLASS=IN, QTYPE=A

So our workaround is right, but GLib probably shouldn't be failing with such a
nonspecific error: it should just go for the A record itself.

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