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authorJohannes Berg <johannes.berg@intel.com>2012-05-10 21:27:18 +0200
committerJohn W. Linville <linville@tuxdriver.com>2012-05-16 13:08:16 -0400
commitcd6c65981e72aef9f5cc42ffe64404542162790a (patch)
treeb57dfa02a6bf1b01f0f19489f90da0a84e3879ba /net/wireless
parent294a20e039a5125b0e88b96e0ee47065ff4e07a5 (diff)
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>
Diffstat (limited to 'net/wireless')
-rw-r--r--net/wireless/nl80211.c59
1 files changed, 29 insertions, 30 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index f1b0774d098b..206465dc0cab 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1179,6 +1179,27 @@ static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
wdev->iftype == NL80211_IFTYPE_P2P_GO;
}
+static bool nl80211_valid_channel_type(struct genl_info *info,
+ enum nl80211_channel_type *channel_type)
+{
+ enum nl80211_channel_type tmp;
+
+ if (!info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
+ return false;
+
+ tmp = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
+ if (tmp != NL80211_CHAN_NO_HT &&
+ tmp != NL80211_CHAN_HT20 &&
+ tmp != NL80211_CHAN_HT40PLUS &&
+ tmp != NL80211_CHAN_HT40MINUS)
+ return false;
+
+ if (channel_type)
+ *channel_type = tmp;
+
+ return true;
+}
+
static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev,
struct genl_info *info)
@@ -1193,15 +1214,9 @@ static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
if (!nl80211_can_set_dev_channel(wdev))
return -EOPNOTSUPP;
- 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;
- }
+ if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
+ !nl80211_valid_channel_type(info, &channel_type))
+ return -EINVAL;
freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
@@ -4918,12 +4933,7 @@ static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
enum nl80211_channel_type 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_HT40MINUS &&
- channel_type != NL80211_CHAN_HT40PLUS)
+ if (!nl80211_valid_channel_type(info, &channel_type))
return -EINVAL;
if (channel_type != NL80211_CHAN_NO_HT &&
@@ -5491,15 +5501,9 @@ static int nl80211_remain_on_channel(struct sk_buff *skb,
!(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
return -EOPNOTSUPP;
- 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;
- }
+ if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
+ !nl80211_valid_channel_type(info, &channel_type))
+ return -EINVAL;
freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
chan = rdev_freq_to_chan(rdev, freq, channel_type);
@@ -5770,12 +5774,7 @@ static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
}
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)
+ if (!nl80211_valid_channel_type(info, &channel_type))
return -EINVAL;
channel_type_valid = true;
}