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cfg80211: Advertise extended capabilities per interface type to userspace

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The driver extended capabilities may differ for different
interface types which the userspace needs to know (for
example the fine timing measurement initiator and responder
bits might differ for a station and AP). Add a new nl80211
attribute to provide extended capabilities per interface type
to userspace.

Signed-off-by: Vidyullatha Kanchanapally <vkanchan@qti.qualcomm.com>
Reviewed-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Kanchanapally, Vidyullatha
2016-05-16 10:41:04 +05:30
committed by Johannes Berg
parent bf1ecd2105
commit 019ae3a918
4 changed files with 106 additions and 2 deletions
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30
net/wireless/core.c
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@@ -750,6 +750,36 @@ int wiphy_register(struct wiphy *wiphy)
nl80211_send_reg_change_event(&request);
}
/* Check that nobody globally advertises any capabilities they do not
* advertise on all possible interface types.
*/
if (wiphy->extended_capabilities_len &&
wiphy->num_iftype_ext_capab &&
wiphy->iftype_ext_capab) {
u8 supported_on_all, j;
const struct wiphy_iftype_ext_capab *capab;
capab = wiphy->iftype_ext_capab;
for (j = 0; j < wiphy->extended_capabilities_len; j++) {
if (capab[0].extended_capabilities_len > j)
supported_on_all =
capab[0].extended_capabilities[j];
else
supported_on_all = 0x00;
for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
if (j >= capab[i].extended_capabilities_len) {
supported_on_all = 0x00;
break;
}
supported_on_all &=
capab[i].extended_capabilities[j];
}
if (WARN_ON(wiphy->extended_capabilities[j] &
~supported_on_all))
break;
}
}
rdev->wiphy.registered = true;
rtnl_unlock();