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authorIlan Peer <ilan.peer@intel.com>2014-02-23 09:13:01 +0200
committerJohannes Berg <johannes.berg@intel.com>2014-04-09 10:55:34 +0200
commit174e0cd28af0fe3c6c634c3e4d9e042c683bd7f7 (patch)
tree047a3e0b02e6e5bb41324cd4571ef6251cd5fa79 /net/wireless/reg.c
parent94fc661f68c881eaa3a5904c12a2269372aa94d9 (diff)
cfg80211: Enable GO operation on additional channels
Allow GO operation on a channel marked with IEEE80211_CHAN_GO_CONCURRENT iff there is an active station interface that is associated to an AP operating on the same channel in the 2 GHz band or the same UNII band (in the 5 GHz band). This relaxation is not allowed if the channel is marked with IEEE80211_CHAN_RADAR. Note that this is a permissive approach to the FCC definitions, that require a clear assessment that the device operating the AP is an authorized master, i.e., with radar detection and DFS capabilities. It is assumed that such restrictions are enforced by user space. Furthermore, it is assumed, that if the conditions that allowed for the operation of the GO on such a channel change, i.e., the station interface disconnected from the AP, it is the responsibility of user space to evacuate the GO from the channel. Signed-off-by: Ilan Peer <ilan.peer@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/reg.c')
-rw-r--r--net/wireless/reg.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 2b8c1000c1be..58f48b8f42ae 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -2616,6 +2616,35 @@ static void reg_timeout_work(struct work_struct *work)
rtnl_unlock();
}
+/*
+ * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
+ * UNII band definitions
+ */
+int cfg80211_get_unii(int freq)
+{
+ /* UNII-1 */
+ if (freq >= 5150 && freq <= 5250)
+ return 0;
+
+ /* UNII-2A */
+ if (freq > 5250 && freq <= 5350)
+ return 1;
+
+ /* UNII-2B */
+ if (freq > 5350 && freq <= 5470)
+ return 2;
+
+ /* UNII-2C */
+ if (freq > 5470 && freq <= 5725)
+ return 3;
+
+ /* UNII-3 */
+ if (freq > 5725 && freq <= 5825)
+ return 4;
+
+ return -EINVAL;
+}
+
int __init regulatory_init(void)
{
int err = 0;