Helper function for finding out which channel is
used by a given interface.
Will be used for matching interface combinations.
Change-Id: Ic9e5a68d66aaa26e73901648b04a6e9b465430d0
Signed-off-by: Michal Kazior <michal.kazior@xxxxxxxxx>
---
net/wireless/chan.c | 31 +++++++++++++++++++++++++++++++
net/wireless/core.h | 4 ++++
2 files changed, 35 insertions(+), 0 deletions(-)
diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index c1999e4..45b28ab 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -92,3 +92,34 @@ int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
return rdev->ops->set_monitor_channel(&rdev->wiphy, chan, chantype);
}
+
+struct ieee80211_channel *
+cfg80211_get_used_channel(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev)
+{
+ ASSERT_RDEV_LOCK(rdev);
+ ASSERT_WDEV_LOCK(wdev);
+
+ switch (wdev->iftype) {
+ case NL80211_IFTYPE_ADHOC:
+ case NL80211_IFTYPE_STATION:
+ case NL80211_IFTYPE_P2P_CLIENT:
+ if (wdev->current_bss)
+ return wdev->current_bss->pub.channel;
+ break;
+ case NL80211_IFTYPE_AP:
+ case NL80211_IFTYPE_P2P_GO:
+ case NL80211_IFTYPE_MESH_POINT:
+ return wdev->channel;
+ case NL80211_IFTYPE_MONITOR:
+ case NL80211_IFTYPE_AP_VLAN:
+ case NL80211_IFTYPE_WDS:
+ /* these interface types don't really have a channel */
+ return NULL;
+ case NL80211_IFTYPE_UNSPECIFIED:
+ case NUM_NL80211_IFTYPES:
+ WARN_ON(1);
+ }
+
+ return NULL;
+}
diff --git a/net/wireless/core.h b/net/wireless/core.h
index a366ffd..54c24de 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -446,6 +446,10 @@ cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
}
struct ieee80211_channel *
+cfg80211_get_used_channel(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *wdev);
+
+struct ieee80211_channel *
rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
int freq, enum nl80211_channel_type channel_type);
int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
--
1.7.0.4
--
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