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path: root/net/wireless/nl80211.c
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Diffstat (limited to 'net/wireless/nl80211.c')
-rw-r--r--net/wireless/nl80211.c199
1 files changed, 112 insertions, 87 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index d86428145c3..b07c4fc4ae2 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -2579,6 +2579,9 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
params.ht_capa =
nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
+ if (!rdev->ops->change_station)
+ return -EOPNOTSUPP;
+
if (parse_station_flags(info, &params))
return -EINVAL;
@@ -2590,73 +2593,84 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
params.plink_state =
nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
- params.vlan = get_vlan(info, rdev);
- if (IS_ERR(params.vlan))
- return PTR_ERR(params.vlan);
-
- /* validate settings */
- err = 0;
-
switch (dev->ieee80211_ptr->iftype) {
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_AP_VLAN:
case NL80211_IFTYPE_P2P_GO:
/* disallow mesh-specific things */
if (params.plink_action)
- err = -EINVAL;
+ return -EINVAL;
+
+ /* TDLS can't be set, ... */
+ if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
+ return -EINVAL;
+ /*
+ * ... but don't bother the driver with it. This works around
+ * a hostapd/wpa_supplicant issue -- it always includes the
+ * TLDS_PEER flag in the mask even for AP mode.
+ */
+ params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
+
+ /* accept only the listed bits */
+ if (params.sta_flags_mask &
+ ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
+ BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
+ BIT(NL80211_STA_FLAG_WME) |
+ BIT(NL80211_STA_FLAG_MFP)))
+ return -EINVAL;
+
+ /* must be last in here for error handling */
+ params.vlan = get_vlan(info, rdev);
+ if (IS_ERR(params.vlan))
+ return PTR_ERR(params.vlan);
break;
case NL80211_IFTYPE_P2P_CLIENT:
case NL80211_IFTYPE_STATION:
/* disallow things sta doesn't support */
if (params.plink_action)
- err = -EINVAL;
- if (params.vlan)
- err = -EINVAL;
- if (params.supported_rates &&
- !(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
- err = -EINVAL;
+ return -EINVAL;
if (params.ht_capa)
- err = -EINVAL;
+ return -EINVAL;
if (params.listen_interval >= 0)
- err = -EINVAL;
- if (params.sta_flags_mask &
- ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
- BIT(NL80211_STA_FLAG_TDLS_PEER)))
- err = -EINVAL;
- /* can't change the TDLS bit */
- if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
- (params.sta_flags_mask & BIT(NL80211_STA_FLAG_TDLS_PEER)))
- err = -EINVAL;
+ return -EINVAL;
+ /*
+ * Don't allow userspace to change the TDLS_PEER flag,
+ * but silently ignore attempts to change it since we
+ * don't have state here to verify that it doesn't try
+ * to change the flag.
+ */
+ params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
+
+ /* reject any changes other than AUTHORIZED */
+ if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
+ return -EINVAL;
break;
case NL80211_IFTYPE_MESH_POINT:
/* disallow things mesh doesn't support */
if (params.vlan)
- err = -EINVAL;
+ return -EINVAL;
if (params.ht_capa)
- err = -EINVAL;
+ return -EINVAL;
if (params.listen_interval >= 0)
- err = -EINVAL;
+ return -EINVAL;
+ /*
+ * No special handling for TDLS here -- the userspace
+ * mesh code doesn't have this bug.
+ */
if (params.sta_flags_mask &
~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
BIT(NL80211_STA_FLAG_MFP) |
BIT(NL80211_STA_FLAG_AUTHORIZED)))
- err = -EINVAL;
+ return -EINVAL;
break;
default:
- err = -EINVAL;
+ return -EOPNOTSUPP;
}
- if (err)
- goto out;
-
- if (!rdev->ops->change_station) {
- err = -EOPNOTSUPP;
- goto out;
- }
+ /* be aware of params.vlan when changing code here */
err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
- out:
if (params.vlan)
dev_put(params.vlan);
@@ -2711,70 +2725,81 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
params.plink_action =
nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
+ if (!rdev->ops->add_station)
+ return -EOPNOTSUPP;
+
if (parse_station_flags(info, &params))
return -EINVAL;
- /* 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;
+ switch (dev->ieee80211_ptr->iftype) {
+ 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;
+
+ 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;
- 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_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 (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;
- if (params.max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
+ 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;
+ /* but don't bother the driver with it */
+ params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
- params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
+ /* must be last in here for error handling */
+ params.vlan = get_vlan(info, rdev);
+ if (IS_ERR(params.vlan))
+ return PTR_ERR(params.vlan);
+ break;
+ case NL80211_IFTYPE_MESH_POINT:
+ /* TDLS peers cannot be added */
+ if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
+ return -EINVAL;
+ break;
+ case NL80211_IFTYPE_STATION:
+ /* Only TDLS peers can be added */
+ if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
+ return -EINVAL;
+ /* Can only add if TDLS ... */
+ if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
+ return -EOPNOTSUPP;
+ /* ... with external setup is supported */
+ if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
+ return -EOPNOTSUPP;
+ break;
+ default:
+ return -EOPNOTSUPP;
}
- if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
- dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
- dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
- dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO &&
- dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION)
- return -EINVAL;
-
- /*
- * Only managed stations can add TDLS peers, and only when the
- * wiphy supports external TDLS setup.
- */
- if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_STATION &&
- !((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
- (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
- (rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP)))
- return -EINVAL;
-
- params.vlan = get_vlan(info, rdev);
- if (IS_ERR(params.vlan))
- return PTR_ERR(params.vlan);
-
- /* validate settings */
- err = 0;
-
- if (!rdev->ops->add_station) {
- err = -EOPNOTSUPP;
- goto out;
- }
+ /* be aware of params.vlan when changing code here */
err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
- out:
if (params.vlan)
dev_put(params.vlan);
return err;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-12 09:21:35 +0000