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authorEmmanuel Grumbach <emmanuel.grumbach@intel.com>2017-08-18 15:31:41 +0300
committerJohannes Berg <johannes.berg@intel.com>2017-09-21 11:42:03 +0200
commit65026002d69de006e273749bb799d3b01b757eb0 (patch)
tree82499a140005529d29c7e26741cd3b117c7a0d62 /net/wireless
parenta6bcda44843c6dfced0fb973e2607c2a98addfa9 (diff)
nl80211: add an option to allow MFP without requiring it
The user space can now allow the kernel to associate to an AP that requires MFP or that doesn't have MFP enabled in the same NL80211_CMD_CONNECT command, by using a new NL80211_MFP_OPTIONAL flag. The driver / firmware will decide whether to use it or not. Include a feature bit to advertise support for NL80211_MFP_OPTIONAL. This allows new user space to run on old kernels and know that it cannot use the new attribute if it isn't supported. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
-rw-r--r--net/wireless/nl80211.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 2e6f5f4065f9..1e39ba3cfd06 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -8952,8 +8952,14 @@ static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
if (info->attrs[NL80211_ATTR_USE_MFP]) {
connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
+ if (connect.mfp == NL80211_MFP_OPTIONAL &&
+ !wiphy_ext_feature_isset(&rdev->wiphy,
+ NL80211_EXT_FEATURE_MFP_OPTIONAL))
+ return -EOPNOTSUPP;
+
if (connect.mfp != NL80211_MFP_REQUIRED &&
- connect.mfp != NL80211_MFP_NO)
+ connect.mfp != NL80211_MFP_NO &&
+ connect.mfp != NL80211_MFP_OPTIONAL)
return -EINVAL;
} else {
connect.mfp = NL80211_MFP_NO;