~/blog / drivers
Drivers
2 posts tagged Drivers.
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Three Ways to Fake Wi-Fi, One Merged: Zephyr's New hwsim Linux has had mac80211_hwsim for years; Zephyr had nothing like it — you couldn't test the Wi-Fi supplicant without a radio on the bench. Three different fixes landed on the table at once; an RFC and a Wi-Fi telco sorted out which does what, and I built and merged the in-process one: N virtual radios in a single image, running real WPA2 and WPA3 handshakes with zero hardware. Here's the design call, the one problem that makes it hard on Zephyr specifically, and the war story of getting SAE green. -
From EWDK Build to Bidirectional Ping: Debugging Windows' New WiFiCx Sample Driver In 2024 I filed a GitHub issue asking Microsoft for a WiFiCx reference driver. It closed this year, pointing at a brand-new sample that didn't actually pass traffic. Here's the pktmon trace that found the missing access point, and the PR that fixed it.