Commit ee4bc9e7 authored by Simon Wunderlich's avatar Simon Wunderlich Committed by Johannes Berg
Browse files

nl80211: enable IBSS support for channel switch announcements 



Signed-off-by: default avatarSimon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: default avatarMathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 9449410f

net/wireless/nl80211.c

+34 −15
Original line number Diff line number Diff line
@@ -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;
@@ -5706,13 +5719,18 @@ 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);

	/* 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,

					   params.chandef.chan,
@@ -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;