Just sent out a diff which implements monitor mode support in the driver on : marc.info/?l=openbsd-tech&m=15

I've written this mainly to serve my own interests in processing bug reports about OpenBSD wifi.

Some problem reports turn out to be caused by bad wifi network condiitions, where traffic between different networks overlaps on the same channel. Monitor mode allows users to record traffic on their access point's channel and prove or disprove the presence of such interference.

The older iwn(4) driver could already be used for this but iwn(4) devices are becoming less common than iwm(4) ones.

@stsp The diff works on the 3165 device in my notebook

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