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nl80211: refactor valid channel type check
There are four instances in nl80211 of getting the channel type from the attribute and validating it, refactor those. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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294a20e039
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cd6c65981e
@ -1179,6 +1179,27 @@ static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
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wdev->iftype == NL80211_IFTYPE_P2P_GO;
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}
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static bool nl80211_valid_channel_type(struct genl_info *info,
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enum nl80211_channel_type *channel_type)
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{
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enum nl80211_channel_type tmp;
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if (!info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
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return false;
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tmp = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
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if (tmp != NL80211_CHAN_NO_HT &&
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tmp != NL80211_CHAN_HT20 &&
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tmp != NL80211_CHAN_HT40PLUS &&
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tmp != NL80211_CHAN_HT40MINUS)
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return false;
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if (channel_type)
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*channel_type = tmp;
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return true;
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}
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static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev,
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struct genl_info *info)
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@ -1193,15 +1214,9 @@ static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
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if (!nl80211_can_set_dev_channel(wdev))
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return -EOPNOTSUPP;
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if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
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channel_type = nla_get_u32(info->attrs[
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NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
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if (channel_type != NL80211_CHAN_NO_HT &&
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channel_type != NL80211_CHAN_HT20 &&
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channel_type != NL80211_CHAN_HT40PLUS &&
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channel_type != NL80211_CHAN_HT40MINUS)
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return -EINVAL;
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}
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if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
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!nl80211_valid_channel_type(info, &channel_type))
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return -EINVAL;
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freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
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@ -4918,12 +4933,7 @@ static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
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if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
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enum nl80211_channel_type channel_type;
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channel_type = nla_get_u32(
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info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
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if (channel_type != NL80211_CHAN_NO_HT &&
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channel_type != NL80211_CHAN_HT20 &&
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channel_type != NL80211_CHAN_HT40MINUS &&
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channel_type != NL80211_CHAN_HT40PLUS)
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if (!nl80211_valid_channel_type(info, &channel_type))
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return -EINVAL;
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if (channel_type != NL80211_CHAN_NO_HT &&
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@ -5491,15 +5501,9 @@ static int nl80211_remain_on_channel(struct sk_buff *skb,
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!(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
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return -EOPNOTSUPP;
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if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
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channel_type = nla_get_u32(
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info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
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if (channel_type != NL80211_CHAN_NO_HT &&
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channel_type != NL80211_CHAN_HT20 &&
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channel_type != NL80211_CHAN_HT40PLUS &&
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channel_type != NL80211_CHAN_HT40MINUS)
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return -EINVAL;
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}
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if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
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!nl80211_valid_channel_type(info, &channel_type))
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return -EINVAL;
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freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
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chan = rdev_freq_to_chan(rdev, freq, channel_type);
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@ -5770,12 +5774,7 @@ static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
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}
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if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
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channel_type = nla_get_u32(
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info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
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if (channel_type != NL80211_CHAN_NO_HT &&
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channel_type != NL80211_CHAN_HT20 &&
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channel_type != NL80211_CHAN_HT40PLUS &&
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channel_type != NL80211_CHAN_HT40MINUS)
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if (!nl80211_valid_channel_type(info, &channel_type))
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return -EINVAL;
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channel_type_valid = true;
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}
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