Wireless bridging
 

1) Question: Is wireless bridging possible? (I'm getting mixed opinions regarding this question.)

I'm trying to bridge a vnic (qemu) to a wlan nic (RTL3070) within a debian guest. Currently I'm following the debian guide, but it doesn't detail how or when to authenticate the wnic to the AP, which is a big issue. As a result, my network config is an absolute mess (wpa_supplicant has a working config).

I understand that there's an issue with ARP and APs (APs don't like switching packets to clients whose MAC isn't consistent). Hence the solution here is ARP Proxy, and Debian's solution is ebtables.

2) Question: Which of these two methods actually work?

I also have issues understanding IP addressing related to the bridged interfaces. From what I have gathered the bridge and the associated NICs don't require an IP address, because they are working at layer 2 (this includes the wnic).

3) Question: does the wnic, vnic, or even the bridge require an IP address?

No, for common hardware. Some cards that support AP master mode, probably could be bridged, but I had not met them for years to test.