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authorMichal Kazior <michal.kazior@tieto.com>2012-06-29 12:47:00 +0200
committerJohannes Berg <johannes.berg@intel.com>2012-06-29 13:39:16 +0200
commit26ab9a0c589db9ba2710f042c4959da25fd3297b (patch)
tree4c8c1df8f9dd67b1556f0f4271f948126b0b8eaa /net/wireless/chan.c
parentc30a3d38689bc601e03d5f2ad3c37d8ea13e46ca (diff)
downloadlinux-26ab9a0c589db9ba2710f042c4959da25fd3297b.tar.bz2
cfg80211: introduce cfg80211_get_chan_state
Helper function for finding out which channel is used by a given interface. An exclusive channel can be used only by a single interface. This is mainly for non-fixed channel IBSS handling. Signed-off-by: Michal Kazior <michal.kazior@tieto.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/chan.c')
-rw-r--r--net/wireless/chan.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index c1999e45a07c..167e7cb60089 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -92,3 +92,54 @@ int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
return rdev->ops->set_monitor_channel(&rdev->wiphy, chan, chantype);
}
+
+void
+cfg80211_get_chan_state(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev,
+ struct ieee80211_channel **chan,
+ enum cfg80211_chan_mode *chanmode)
+{
+ *chan = NULL;
+ *chanmode = CHAN_MODE_UNDEFINED;
+
+ ASSERT_RDEV_LOCK(rdev);
+ ASSERT_WDEV_LOCK(wdev);
+
+ if (!netif_running(wdev->netdev))
+ return;
+
+ switch (wdev->iftype) {
+ case NL80211_IFTYPE_ADHOC:
+ if (wdev->current_bss) {
+ *chan = wdev->current_bss->pub.channel;
+ *chanmode = wdev->ibss_fixed
+ ? CHAN_MODE_SHARED
+ : CHAN_MODE_EXCLUSIVE;
+ return;
+ }
+ case NL80211_IFTYPE_STATION:
+ case NL80211_IFTYPE_P2P_CLIENT:
+ if (wdev->current_bss) {
+ *chan = wdev->current_bss->pub.channel;
+ *chanmode = CHAN_MODE_SHARED;
+ return;
+ }
+ break;
+ case NL80211_IFTYPE_AP:
+ case NL80211_IFTYPE_P2P_GO:
+ case NL80211_IFTYPE_MESH_POINT:
+ *chan = wdev->channel;
+ *chanmode = CHAN_MODE_SHARED;
+ return;
+ case NL80211_IFTYPE_MONITOR:
+ case NL80211_IFTYPE_AP_VLAN:
+ case NL80211_IFTYPE_WDS:
+ /* these interface types don't really have a channel */
+ return;
+ case NL80211_IFTYPE_UNSPECIFIED:
+ case NUM_NL80211_IFTYPES:
+ WARN_ON(1);
+ }
+
+ return;
+}