cfg/mac80211: add regulatory classes IE during TDLS setup
Seems Broadcom TDLS peers (Nexus 5, Xperia Z3) refuse to allow TDLS
connection when channel-switching is supported but the regulatory
classes IE is missing from the setup request.
Add a chandef to reg-class translation function to cfg80211 and use it
to add the required IE during setup. For now add only the current
regulatory class as supported - it is enough to resolve the
compatibility issue.
Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c
index bc7e404..79ed59a 100644
--- a/net/mac80211/tdls.c
+++ b/net/mac80211/tdls.c
@@ -136,6 +136,24 @@
*pos = 2 * subband_cnt;
}
+static void ieee80211_tdls_add_oper_classes(struct ieee80211_sub_if_data *sdata,
+ struct sk_buff *skb)
+{
+ u8 *pos;
+ u8 op_class;
+
+ if (!ieee80211_chandef_to_operating_class(&sdata->vif.bss_conf.chandef,
+ &op_class))
+ return;
+
+ pos = skb_put(skb, 4);
+ *pos++ = WLAN_EID_SUPPORTED_REGULATORY_CLASSES;
+ *pos++ = 2; /* len */
+
+ *pos++ = op_class;
+ *pos++ = op_class; /* give current operating class as alternate too */
+}
+
static void ieee80211_tdls_add_bss_coex_ie(struct sk_buff *skb)
{
u8 *pos = (void *)skb_put(skb, 3);
@@ -350,6 +368,8 @@
}
}
+ ieee80211_tdls_add_oper_classes(sdata, skb);
+
/*
* with TDLS we can switch channels, and HT-caps are not necessarily
* the same on all bands. The specification limits the setup to a
@@ -786,6 +806,7 @@
50 + /* supported channels */
3 + /* 40/20 BSS coex */
4 + /* AID */
+ 4 + /* oper classes */
extra_ies_len +
sizeof(struct ieee80211_tdls_lnkie));
if (!skb)