[Bug 5042] New: busybox fails to connect to IPv6-and-V4 targets from v4-only hosts

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=5042

           Summary: busybox fails to connect to IPv6-and-V4 targets from
                    v4-only hosts
           Product: Busybox
           Version: 1.19.x
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Networking
        AssignedTo: unassigned at busybox.net
        ReportedBy: mjt+busybox at tls.msk.ru
                CC: busybox-cvs at busybox.net
   Estimated Hours: 0.0


This is http://bugs.debian.org/658616 , initially reported about wget but it is
seemingly more generic than wget.

Apparently when getaddrinfo() returns a v6 addresss before v4 one, and the host
from which we're trying to connect does not have v6 routing, the connection
fails.

As far as I can see, this is due to str2sockaddr() function returning only
first address, even if it uses getaddrinfo() which returns a list.  Next that
single address gets passed to connect routine which, on a
v6-enabled-but-not-configured host will fail.

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