[RFC 1/2] cfg80211: Add channel flags limiting availability to OCB mode only

From: Rostislav Lisovy
Date: Mon May 19 2014 - 10:50:02 EST


IEEE 802.11p operates in its own 5.9GHz band. When there will
be a record for the 5.9GHz band in the regulatory daemon,
it must be limited to the OCB mode only -- using the newly
added flags.

Signed-off-by: Rostislav Lisovy <rostislav.lisovy@xxxxxxxxxxx>
---
include/net/cfg80211.h | 2 ++
include/uapi/linux/nl80211.h | 5 +++++
net/wireless/nl80211.c | 3 +++
net/wireless/reg.c | 2 ++
4 files changed, 12 insertions(+)

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 5c7169b..6722ab2 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -115,6 +115,7 @@ enum ieee80211_band {
* on this channel.
* @IEEE80211_CHAN_NO_10MHZ: 10 MHz bandwidth is not permitted
* on this channel.
+ * @IEEE80211_CHAN_OCB_ONLY: only OCB is allowed on this channel.
*
*/
enum ieee80211_channel_flags {
@@ -131,6 +132,7 @@ enum ieee80211_channel_flags {
IEEE80211_CHAN_GO_CONCURRENT = 1<<10,
IEEE80211_CHAN_NO_20MHZ = 1<<11,
IEEE80211_CHAN_NO_10MHZ = 1<<12,
+ IEEE80211_CHAN_OCB_ONLY = 1<<13,
};

#define IEEE80211_CHAN_NO_HT40 \
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 406010d..970c5df 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -2362,6 +2362,8 @@ enum nl80211_band_attr {
* on this channel in current regulatory domain.
* @NL80211_FREQUENCY_ATTR_NO_10MHZ: 10 MHz operation is not allowed
* on this channel in current regulatory domain.
+ * @NL80211_FREQUENCY_ATTR_OCB_ONLY: no other than OCB networks are
+ * permitted on this channel in current regulatory domain.
* @NL80211_FREQUENCY_ATTR_MAX: highest frequency attribute number
* currently defined
* @__NL80211_FREQUENCY_ATTR_AFTER_LAST: internal use
@@ -2390,6 +2392,7 @@ enum nl80211_frequency_attr {
NL80211_FREQUENCY_ATTR_GO_CONCURRENT,
NL80211_FREQUENCY_ATTR_NO_20MHZ,
NL80211_FREQUENCY_ATTR_NO_10MHZ,
+ NL80211_FREQUENCY_ATTR_OCB_ONLY,

/* keep last */
__NL80211_FREQUENCY_ATTR_AFTER_LAST,
@@ -2558,6 +2561,7 @@ enum nl80211_sched_scan_match_attr {
* @NL80211_RRF_AUTO_BW: maximum available bandwidth should be calculated
* base on contiguous rules and wider channels will be allowed to cross
* multiple contiguous/overlapping frequency ranges.
+ * @NL80211_RRF_OCB_ONLY: no other than OCB is allowed
*/
enum nl80211_reg_rule_flags {
NL80211_RRF_NO_OFDM = 1<<0,
@@ -2570,6 +2574,7 @@ enum nl80211_reg_rule_flags {
NL80211_RRF_NO_IR = 1<<7,
__NL80211_RRF_NO_IBSS = 1<<8,
NL80211_RRF_AUTO_BW = 1<<11,
+ NL80211_RRF_OCB_ONLY = 1<<12,
};

#define NL80211_RRF_PASSIVE_SCAN NL80211_RRF_NO_IR
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 0f1b18f2..c766c31 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -633,6 +633,9 @@ static int nl80211_msg_put_channel(struct sk_buff *msg,
if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
goto nla_put_failure;
+ if ((chan->flags & IEEE80211_CHAN_OCB_ONLY) &&
+ nla_put_flag(msg, NL80211_FREQUENCY_ATTR_OCB_ONLY))
+ goto nla_put_failure;
}

if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index e78f532..74e41f7 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -906,6 +906,8 @@ static u32 map_regdom_flags(u32 rd_flags)
channel_flags |= IEEE80211_CHAN_NO_OFDM;
if (rd_flags & NL80211_RRF_NO_OUTDOOR)
channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
+ if (rd_flags & NL80211_RRF_OCB_ONLY)
+ channel_flags |= IEEE80211_CHAN_OCB_ONLY;
return channel_flags;
}

--
2.0.0.rc0

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