[Bug 59614] New: Aion 4.8 x64: login fails when GetAdaptersInfo returns pseudo-interfaces without valid MAC first on macOS.

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59614

            Bug ID: 59614
           Summary: Aion 4.8 x64: login fails when GetAdaptersInfo returns
                    pseudo-interfaces without valid MAC first on macOS.
           Product: Wine
           Version: 11.5
          Hardware: arm
                OS: MacOS
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: iphlpapi
          Assignee: [e-mail]
          Reporter: [e-mail]

Created attachment 80676
  --> http://bugs.winehq.org/attachment.cgi?id=80676
Combined sanitized logs: ipconfig, GetAdaptersInfo traces, and server-side
validation

This is conceptually similar to Bug 40247 (where macOS loopback interfaces
broke NetBIOS enumeration), but this issue affects iphlpapi::GetAdaptersInfo.

On macOS, pseudo/tunnel interfaces (like lo0, gif0) may appear early during
network interface enumeration and have empty or zero physical addresses. Some
legacy applications use GetAdaptersInfo and blindly select the first returned
adapter for hardware identity.

When this happens, the application propagates an empty MAC address, causing
authentication to fail.

Observed application-side symptom:
Aion 4.8 x64 login server rejects connection due to an empty MAC value
(macAddress=). 

Steps to Reproduce:
1. Run Aion 4.8 x64 on a clean Wine prefix on macOS.
2. Attempt to login.
3. Observe rejection because the first adapter has no valid physical address.

Actual Result:
GetAdaptersInfo returns adapters without a valid MAC before adapters with a
real MAC. The application reads the first adapter, sends an empty MAC, and
authentication fails.

Expected Result:
If at least one adapter with a valid MAC exists, GetAdaptersInfo should avoid
returning invalid-MAC entries first, so applications relying on first-adapter
heuristics receive a valid MAC.

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