mac80211: add support for CSA in IBSS mode
This function adds the channel switch announcement implementation for the
IBSS code. It is triggered by userspace (mac80211/cfg) or by external
channel switch announcement, which have to be adopted. Both CSAs in
beacons and action frames are supported. As for AP mode, the channel
switch is applied after some time. However in IBSS mode, the channel
switch IEs are generated in the kernel.
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 54395d7..8e908e1 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2402,7 +2402,8 @@
return RX_DROP_UNUSABLE;
if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC &&
- mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED)
+ mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED &&
+ mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
return RX_DROP_UNUSABLE;
if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
@@ -2566,31 +2567,46 @@
goto queue;
case WLAN_CATEGORY_SPECTRUM_MGMT:
- if (status->band != IEEE80211_BAND_5GHZ)
- break;
-
- if (sdata->vif.type != NL80211_IFTYPE_STATION)
- break;
-
/* verify action_code is present */
if (len < IEEE80211_MIN_ACTION_SIZE + 1)
break;
switch (mgmt->u.action.u.measurement.action_code) {
case WLAN_ACTION_SPCT_MSR_REQ:
+ if (status->band != IEEE80211_BAND_5GHZ)
+ break;
+
if (len < (IEEE80211_MIN_ACTION_SIZE +
sizeof(mgmt->u.action.u.measurement)))
break;
- ieee80211_process_measurement_req(sdata, mgmt, len);
- goto handled;
- case WLAN_ACTION_SPCT_CHL_SWITCH:
+
if (sdata->vif.type != NL80211_IFTYPE_STATION)
break;
- if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid))
+ ieee80211_process_measurement_req(sdata, mgmt, len);
+ goto handled;
+ case WLAN_ACTION_SPCT_CHL_SWITCH: {
+ u8 *bssid;
+ if (len < (IEEE80211_MIN_ACTION_SIZE +
+ sizeof(mgmt->u.action.u.chan_switch)))
+ break;
+
+ if (sdata->vif.type != NL80211_IFTYPE_STATION &&
+ sdata->vif.type != NL80211_IFTYPE_ADHOC)
+ break;
+
+ if (sdata->vif.type == NL80211_IFTYPE_STATION)
+ bssid = sdata->u.mgd.bssid;
+ else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
+ bssid = sdata->u.ibss.bssid;
+ else
+ break;
+
+ if (!ether_addr_equal(mgmt->bssid, bssid))
break;
goto queue;
+ }
}
break;
case WLAN_CATEGORY_SA_QUERY: