[Bug 40247] New: Wine returns bad MAC address for loopback interface, fails to run licensed programs.

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=40247

            Bug ID: 40247
           Summary: Wine returns bad MAC address for loopback interface,
                    fails to run licensed programs.
           Product: Wine
           Version: unspecified
          Hardware: x86
                OS: Mac OS X
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: netcfgx
          Assignee: wine-bugs at winehq.org
          Reporter: alexchandel at gmail.com

There are some (poorly written) programs that base their licensing off the
system's MAC address. Unfortunately, some of them are necessary for engineering
work. These are old programs with brittle source but valid licenses that cannot
be run because Wine cannot ever tell them what Windows would tell them.

Wine always returns a MAC address of "00:00:00:00:00:00" to these programs. I
assume that's because the loopback interface is first in `ifconfig`, and thus
is enumerated first to Windows programs by Wine, and has no MAC address.

In most cases, programs like these choose the MAC address of the first "network
adapter" that would have been printed by `ipconfig /all`. Again, in Wine, the
first such adapter printed is the loopback interface.

This problem can't be solved by normal MAC address spoofing techniques, because
the loopback interface simply doesn't have a MAC address according to the host.

And Windows tricks to change the MAC address, like modifying the
"NetworkAddress" key of
"HKLM\System\CurrentControlSet\Control\Class\{4d36e972-e325-11ce-bfc1-08002be10318}\XXXX",
don't seem to have any effect in Wine. Particularly with respect to affecting
the loopback interface.

There needs to be a Wine option, possibly a key somewhere in
"HKLM\Software\Wine", to override (at the very least) the loopback interface's
apparent MAC address, so that these programs can work.

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