On Tue, 2008-06-10 at 13:50 +0300, Jouni Malinen wrote: > hostapd and wpa_supplicant include a test driver interface that allows > them to be tested on a single host without any wireless hardware for > development purposes. I have found this very valuable both for > developing new functionality and for testing existing code. > > In order to provide similar mechanism for mac80211 developers and to > extend the scope of suitable test cases for hostapd/wpa_supplicant, I've > written a Linux kernel module that provides a similar test interface at > a lower layer. mac80211_hwsim simulates WLAN hardware and the air > interface between the radios by acting as a low-level radio driver for > mac80211. Neither mac80211 nor user space programs need any changes to > work with the simulated radios. Way cool! > The initial version of mac80211_hwsim is available from the > mac80211_hwsim subdirectory of my hostap Git tree: > git://w1.fi/srv/git/hostap.git > http://w1.fi/gitweb/gitweb.cgi?p=hostap.git;a=tree;f=mac80211_hwsim > > If there is interest in moving mac80211_hwsim module into the Linux > kernel tree, I'm open to doing that, too. I think that would make sense, yes, especially since one look at the code already tells me that it needs to follow large API changes to work with the current mac80211. One thing caught my eye: you use GFP_KERNEL in the tx routine, that's not good, it is running under a spinlock. One thing that I'd like to add is a having a "global" monitor interface that is registered by the hwsim module and not mac80211 and shows all frames, regardless of channel etc. johannes
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