diff options
| author |   Michal Kazior <michal.kazior@tieto.com> | 2012-06-29 12:47:00 +0200 |
|---|---|---|
| committer |   Johannes Berg <johannes.berg@intel.com> | 2012-06-29 13:39:16 +0200 |
| commit | 26ab9a0c589db9ba2710f042c4959da25fd3297b (patch) | |
| tree | 4c8c1df8f9dd67b1556f0f4271f948126b0b8eaa | |
| parent | cfg80211: track ibss fixed channel (diff) | |
| download | linux-dev-26ab9a0c589db9ba2710f042c4959da25fd3297b.tar.xz linux-dev-26ab9a0c589db9ba2710f042c4959da25fd3297b.zip | |
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>
| -rw-r--r-- | net/wireless/chan.c | 51 | ||||
| -rw-r--r-- | net/wireless/core.h | 12 |
2 files changed, 63 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; +} diff --git a/net/wireless/core.h b/net/wireless/core.h index fef476d2117e..56f18c2eb919 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -241,6 +241,12 @@ struct cfg80211_cached_keys { int def, defmgmt; }; +enum cfg80211_chan_mode { + CHAN_MODE_UNDEFINED, + CHAN_MODE_SHARED, + CHAN_MODE_EXCLUSIVE, +}; + /* free object */ extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev); @@ -419,6 +425,12 @@ cfg80211_can_add_interface(struct cfg80211_registered_device *rdev, return cfg80211_can_change_interface(rdev, NULL, iftype); } +void +cfg80211_get_chan_state(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev, + struct ieee80211_channel **chan, + enum cfg80211_chan_mode *chanmode); + struct ieee80211_channel * rdev_freq_to_chan(struct cfg80211_registered_device *rdev, int freq, enum nl80211_channel_type channel_type); |