diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2012-05-10 23:27:18 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-05-16 21:08:16 +0400 |
| commit | cd6c65981e72aef9f5cc42ffe64404542162790a (patch) | |
| tree | b57dfa02a6bf1b01f0f19489f90da0a84e3879ba /net/wireless | |
| parent | 294a20e039a5125b0e88b96e0ee47065ff4e07a5 (diff) | |
| download | linux-cd6c65981e72aef9f5cc42ffe64404542162790a.tar.xz | |
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.c | 59 |
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; } |