static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev = info->user_ptr[0];
	int err;
	struct net_device *dev = info->user_ptr[1];
	struct station_parameters params;
	u8 *mac_addr = NULL;

	memset(&params, 0, sizeof(params));

	params.listen_interval = -1;
	params.plink_state = -1;

	if (info->attrs[NL80211_ATTR_STA_AID])
		return -EINVAL;

	if (!info->attrs[NL80211_ATTR_MAC])
		return -EINVAL;

	mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);

	if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
		params.supported_rates =
			nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
		params.supported_rates_len =
			nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
	}

	if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
		params.listen_interval =
		    nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);

	if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
		params.ht_capa =
			nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);

	if (parse_station_flags(info, &params))
		return -EINVAL;

	if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
		params.plink_action =
		    nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);

	if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
		params.plink_state =
		    nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);

	err = get_vlan(info, rdev, &params.vlan);
	if (err)
		goto out;

	/* validate settings */
	err = 0;

	switch (dev->ieee80211_ptr->iftype) {
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_AP_VLAN:
	case NL80211_IFTYPE_P2P_GO:
		/* disallow mesh-specific things */
		if (params.plink_action)
			err = -EINVAL;
		break;
	case NL80211_IFTYPE_P2P_CLIENT:
	case NL80211_IFTYPE_STATION:
		/* disallow everything but AUTHORIZED flag */
		if (params.plink_action)
			err = -EINVAL;
		if (params.vlan)
			err = -EINVAL;
		if (params.supported_rates)
			err = -EINVAL;
		if (params.ht_capa)
			err = -EINVAL;
		if (params.listen_interval >= 0)
			err = -EINVAL;
		if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
			err = -EINVAL;
		break;
	case NL80211_IFTYPE_MESH_POINT:
		/* disallow things mesh doesn't support */
		if (params.vlan)
			err = -EINVAL;
		if (params.ht_capa)
			err = -EINVAL;
		if (params.listen_interval >= 0)
			err = -EINVAL;
		if (params.sta_flags_mask &
				~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
				  BIT(NL80211_STA_FLAG_MFP) |
				  BIT(NL80211_STA_FLAG_AUTHORIZED)))
			err = -EINVAL;
		break;
	default:
		err = -EINVAL;
	}

	if (err)
		goto out;

	if (!rdev->ops->change_station) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);

 out:
	if (params.vlan)
		dev_put(params.vlan);

	return err;
}
static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
{
	struct cfg80211_registered_device *rdev = info->user_ptr[0];
	int err;
	struct net_device *dev = info->user_ptr[1];
	struct station_parameters params;
	u8 *mac_addr = NULL;

	memset(&params, 0, sizeof(params));

	params.listen_interval = -1;
	params.plink_state = -1;

	if (info->attrs[NL80211_ATTR_STA_AID])
		return -EINVAL;

	if (!info->attrs[NL80211_ATTR_MAC])
		return -EINVAL;

	mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);

	if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
		params.supported_rates =
			nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
		params.supported_rates_len =
			nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
	}

	if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
		params.listen_interval =
		    nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);

	if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
		params.ht_capa =
			nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);

	if (parse_station_flags(info, &params))
		return -EINVAL;

	if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
		params.plink_action =
		    nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);

	if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
		params.plink_state =
		    nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);

	err = get_vlan(info, rdev, &params.vlan);
	if (err)
		goto out;

	 
	err = 0;

	switch (dev->ieee80211_ptr->iftype) {
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_AP_VLAN:
	case NL80211_IFTYPE_P2P_GO:
		 
		if (params.plink_action)
			err = -EINVAL;
		break;
	case NL80211_IFTYPE_P2P_CLIENT:
	case NL80211_IFTYPE_STATION:
		 
		if (params.plink_action)
			err = -EINVAL;
		if (params.vlan)
			err = -EINVAL;
		if (params.supported_rates)
			err = -EINVAL;
		if (params.ht_capa)
			err = -EINVAL;
		if (params.listen_interval >= 0)
			err = -EINVAL;
		if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
			err = -EINVAL;
		break;
	case NL80211_IFTYPE_MESH_POINT:
		 
		if (params.vlan)
			err = -EINVAL;
		if (params.ht_capa)
			err = -EINVAL;
		if (params.listen_interval >= 0)
			err = -EINVAL;
		if (params.sta_flags_mask &
				~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
				  BIT(NL80211_STA_FLAG_MFP) |
				  BIT(NL80211_STA_FLAG_AUTHORIZED)))
			err = -EINVAL;
		break;
	default:
		err = -EINVAL;
	}

	if (err)
		goto out;

	if (!rdev->ops->change_station) {
		err = -EOPNOTSUPP;
		goto out;
	}

	err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);

 out:
	if (params.vlan)
		dev_put(params.vlan);

	return err;
}