The following happens in the wpa_supplicant, driver_wext.c lines 2115
and further
#ifdef CONFIG_IEEE80211W
switch (params->mgmt_frame_protection) {
case NO_MGMT_FRAME_PROTECTION:
value = IW_AUTH_MFP_DISABLED;
break;
case MGMT_FRAME_PROTECTION_OPTIONAL:
value = IW_AUTH_MFP_OPTIONAL;
break;
case MGMT_FRAME_PROTECTION_REQUIRED:
value = IW_AUTH_MFP_REQUIRED;
break;
};
if (wpa_driver_wext_set_auth_param(drv, IW_AUTH_MFP, value) < 0)
ret = -1;
#endif /* CONFIG_IEEE80211W */
the ndiswrapper wireless driver (and maybe others?) does not implement
IW_AUTH_MFP, and returns -EOPNOTSUPP;
A fix is needed for ndiswrapper, which can be, for now, to accept the
first two frame protection values, and fail on IW_AUTH_MFP_REQUIRED
only.
--
encrypted modes don't work on ndiswrapper wireless adapters
https://bugs.launchpad.net/bugs/459716
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