The channel_type field is filled by iw and parse by cfg80211 before
being sent to mac80211 for instance (we also check if the specified
channel is capable of ht40+, ht40- or ht20). This information is needed
to properly configure an HT IBSS.
It requires a patch to iw to fill this field.
Signed-off-by: Benoit Papillault <benoit.papillault@xxxxxxx>
---
include/net/cfg80211.h | 1 +
net/wireless/nl80211.c | 20 ++++++++++++++++----
2 files changed, 17 insertions(+), 4 deletions(-)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index b44a2e5..5ead439 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -806,6 +806,7 @@ struct cfg80211_ibss_params {
u8 *ssid;
u8 *bssid;
struct ieee80211_channel *channel;
+ enum nl80211_channel_type channel_type;
u8 *ie;
u8 ssid_len, ie_len;
u16 beacon_interval;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index aaa1aad..039c13f 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3879,6 +3879,7 @@ static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
struct cfg80211_ibss_params ibss;
struct wiphy *wiphy;
struct cfg80211_cached_keys *connkeys = NULL;
+ enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
int err;
memset(&ibss, 0, sizeof(ibss));
@@ -3900,6 +3901,17 @@ static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
return -EINVAL;
}
+ if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
+ channel_type = nla_get_u32(
+ info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
+ if (channel_type != NL80211_CHAN_NO_HT &&
+ channel_type != NL80211_CHAN_HT20 &&
+ channel_type != NL80211_CHAN_HT40PLUS &&
+ channel_type != NL80211_CHAN_HT40MINUS)
+ return -EINVAL;
+ }
+ ibss.channel_type = channel_type;
+
rtnl_lock();
err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
@@ -3933,11 +3945,11 @@ static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
}
- ibss.channel = ieee80211_get_channel(wiphy,
- nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
+ ibss.channel = rdev_freq_to_chan(rdev,
+ nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
+ channel_type);
if (!ibss.channel ||
- ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
- ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
+ ibss.channel->flags & IEEE80211_CHAN_NO_IBSS) {
err = -EINVAL;
goto out;
}
--
1.5.6.5
--
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