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https://bugzilla.novell.com/show_bug.cgi?id=684534

https://bugzilla.novell.com/show_bug.cgi?id=684534#c0


           Summary: getaddrinfo-ipv6-sanity.diff no longer works
    Classification: openSUSE
           Product: openSUSE 11.4
           Version: Final
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Basesystem
        AssignedTo: pbaudis@xxxxxxxxxx
        ReportedBy: mls@xxxxxxxxxx
         QAContact: qa@xxxxxxx
          Found By: Customer
           Blocker: ---


The getaddrinfo-ipv6-sanity.diff makes glibc not do IPv6 AAAA requests if ipv6
is disabled (i.e. there's no ipv6 interface config).

The current glibc code calls gethostbyname4() if AF_UNSPEC is used, it ignores
the usable_ipv6 parameter introduced with the getaddrinfo-ipv6-sanity.diff.

I propose to only use gethostbyname4() if usable_ipv6 is true, i.e. change

    if (fct4 != NULL)
to
    if (fct4 != NULL && usable_ipv6)

in sysdeps/posix/getaddrinfo.c

Side note:
The debian version of getaddrinfo-ipv6-sanity.diff contains a slightly
different getaddrinfo-ipv6-sanity.diff, it skips interfaces where there is only
a link=local ipv6 address defined when doing the ipv6 usability check. That's
good for people with routers running a broken DNS server, but it forbids
link-local IPv6 networks. So I'm not sure if it's a good idea or not.

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