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cfg80211: clean up station WME attribute parsing

Browse Source 
Parse the attributes first, and then disable the apply
flag if needed.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2013-02-14 23:43:25 +01:00
parent 2c1aabf33d
commit 984c311b09
1 changed files with 37 additions and 31 deletions
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68
net/wireless/nl80211.c
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@ -3619,6 +3619,9 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
memset(&params, 0, sizeof(params));
if (!rdev->ops->add_station)
return -EOPNOTSUPP;
if (!info->attrs[NL80211_ATTR_MAC])
return -EINVAL;
@ -3671,8 +3674,30 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
return -EINVAL;
}
if (!rdev->ops->add_station)
return -EOPNOTSUPP;
if (info->attrs[NL80211_ATTR_STA_WME]) {
struct nlattr *tb[NL80211_STA_WME_MAX + 1];
struct nlattr *nla;
nla = info->attrs[NL80211_ATTR_STA_WME];
err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
nl80211_sta_wme_policy);
if (err)
return err;
if (tb[NL80211_STA_WME_UAPSD_QUEUES])
params.uapsd_queues =
nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
if (params.uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
return -EINVAL;
if (tb[NL80211_STA_WME_MAX_SP])
params.max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
if (params.max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
return -EINVAL;
params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
}
if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
return -EINVAL;
@ -3681,36 +3706,11 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_AP_VLAN:
case NL80211_IFTYPE_P2P_GO:
/* parse WME attributes if sta is WME capable */
if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
info->attrs[NL80211_ATTR_STA_WME]) {
struct nlattr *tb[NL80211_STA_WME_MAX + 1];
struct nlattr *nla;
/* ignore WME attributes if iface/sta is not capable */
if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
nla = info->attrs[NL80211_ATTR_STA_WME];
err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
nl80211_sta_wme_policy);
if (err)
return err;
if (tb[NL80211_STA_WME_UAPSD_QUEUES])
params.uapsd_queues =
nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
if (params.uapsd_queues &
~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
return -EINVAL;
if (tb[NL80211_STA_WME_MAX_SP])
params.max_sp =
nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
if (params.max_sp &
~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
return -EINVAL;
params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
}
/* TDLS peers cannot be added */
if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
return -EINVAL;
@ -3731,6 +3731,9 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
return PTR_ERR(params.vlan);
break;
case NL80211_IFTYPE_MESH_POINT:
/* ignore uAPSD data */
params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
/* associated is disallowed */
if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
return -EINVAL;
@ -3739,6 +3742,9 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
return -EINVAL;
break;
case NL80211_IFTYPE_STATION:
/* ignore uAPSD data */
params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
/* associated is disallowed */
if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
return -EINVAL;