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nl80211: enable IBSS support for channel switch announcements 

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Simon Wunderlich 2013-08-28 13:41:33 +02:00 committed by Johannes Berg
parent 9449410f3b
commit ee4bc9e758
1 changed files with 34 additions and 15 deletions
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49
net/wireless/nl80211.c
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@ -5634,15 +5634,26 @@ static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
u8 radar_detect_width = 0;
int err;
bool need_new_beacon = false;
if (!rdev->ops->channel_switch ||
!(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
return -EOPNOTSUPP;
/* may add IBSS support later */
if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
switch (dev->ieee80211_ptr->iftype) {
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_P2P_GO:
need_new_beacon = true;
/* useless if AP is not running */
if (!wdev->beacon_interval)
return -EINVAL;
break;
case NL80211_IFTYPE_ADHOC:
break;
default:
return -EOPNOTSUPP;
}
memset(&params, 0, sizeof(params));
@ -5651,15 +5662,16 @@ static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
return -EINVAL;
/* only important for AP, IBSS and mesh create IEs internally */
if (!info->attrs[NL80211_ATTR_CSA_IES])
return -EINVAL;
/* useless if AP is not running */
if (!wdev->beacon_interval)
if (need_new_beacon &&
(!info->attrs[NL80211_ATTR_CSA_IES] ||
!info->attrs[NL80211_ATTR_CSA_C_OFF_BEACON]))
return -EINVAL;
params.count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
if (!need_new_beacon)
goto skip_beacons;
err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
if (err)
return err;
@ -5699,6 +5711,7 @@ static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
return -EINVAL;
}
skip_beacons:
err = nl80211_parse_chandef(rdev, info, &params.chandef);
if (err)
return err;
@ -5706,12 +5719,17 @@ static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
return -EINVAL;
err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
if (err < 0) {
return err;
} else if (err) {
radar_detect_width = BIT(params.chandef.width);
params.radar_required = true;
/* DFS channels are only supported for AP/P2P GO ... for now. */
if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_AP ||
dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO) {
err = cfg80211_chandef_dfs_required(wdev->wiphy,
&params.chandef);
if (err < 0) {
return err;
} else if (err) {
radar_detect_width = BIT(params.chandef.width);
params.radar_required = true;
}
}
err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
@ -10740,7 +10758,8 @@ void cfg80211_ch_switch_notify(struct net_device *dev,
wdev_lock(wdev);
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
wdev->iftype != NL80211_IFTYPE_P2P_GO))
wdev->iftype != NL80211_IFTYPE_P2P_GO &&
wdev->iftype != NL80211_IFTYPE_ADHOC))
goto out;
wdev->channel = chandef->chan;