[Bug 259343] open-vm-tools logging errors in IPv6-only environment

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 21 Oct 2021 16:01:29 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=259343

            Bug ID: 259343
           Summary: open-vm-tools logging errors in IPv6-only environment
           Product: Base System
           Version: 13.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: marco.davids@sidn.nl

I run a FreeBSD13.0-RELEASE VM on VMWare with a kernel compiled to run
IPv6-only:

include GENERIC
ident GENERIC-IPV6ONLY
makeoptions MKMODULESENV+="WITHOUT_INET_SUPPORT="
nooptions INET
nodevice gre

The open-vm-tools software is logging some errors:

[2021-10-21T08:30:09.627Z] [ warning] [vmsvc] [34374492160]
GuestInfoGetNicInfo: intf_open() failed
[2021-10-21T08:30:09.627Z] [ warning] [guestinfo] [34374492160] Failed to get
NIC info. 

These seem libdumbnet.

I have a feeling that the part below of the code doesn't mix well with an
IPv6-only environment and that the order should perhaps be shuffled a bit in
order to improve things:

https://github.com/pexip/os-libdumbnet/blob/master/src/intf.c#L119
(not sure if this is the official repository, sorry for that - it was the best
I could find)

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