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| author |   Johannes Berg <johannes.berg@intel.com> | 2012-12-27 17:32:09 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2013-01-03 13:01:45 +0100 |
| commit | ba23d2068d85f6616ea5f92320c04e87d4b9e141 (patch) | |
| tree | 8ea8b7d8ab39ada84c967531875aef24892667d6 /net/wireless/nl80211.c | |
| parent | mac80211: unset peer's HT 40 MHz support if not usable (diff) | |
| download | linux-dev-ba23d2068d85f6616ea5f92320c04e87d4b9e141.tar.xz linux-dev-ba23d2068d85f6616ea5f92320c04e87d4b9e141.zip | |
cfg80211: disallow more station changes
The following changes are invalid and should be
disallowed when a station already exists:
* supported rates changes, except for TDLS peers
* listen interval changes
* HT capability changes
Disallow them and also update a mac80211 comment
explaining how they would be racy.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/nl80211.c')
| -rw-r--r-- | net/wireless/nl80211.c | 22 |
1 files changed, 8 insertions, 14 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 087f68ba6d7a..9bd8340af999 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -3188,13 +3188,9 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info) 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 (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL] || + info->attrs[NL80211_ATTR_HT_CAPABILITY]) + return -EINVAL; if (!rdev->ops->change_station) return -EOPNOTSUPP; @@ -3246,6 +3242,10 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info) BIT(NL80211_STA_FLAG_ASSOCIATED))) return -EINVAL; + /* reject other things that can't change */ + if (params.supported_rates) + return -EINVAL; + /* must be last in here for error handling */ params.vlan = get_vlan(info, rdev); if (IS_ERR(params.vlan)) @@ -3265,10 +3265,6 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info) /* disallow things sta doesn't support */ if (params.plink_action) return -EINVAL; - if (params.ht_capa) - return -EINVAL; - if (params.listen_interval >= 0) - return -EINVAL; /* reject any changes other than AUTHORIZED */ if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED)) return -EINVAL; @@ -3277,9 +3273,7 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info) /* disallow things mesh doesn't support */ if (params.vlan) return -EINVAL; - if (params.ht_capa) - return -EINVAL; - if (params.listen_interval >= 0) + if (params.supported_rates) return -EINVAL; /* * No special handling for TDLS here -- the userspace |