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Diffstat (limited to 'net/wireless/nl80211.c')
-rw-r--r--net/wireless/nl80211.c157
1 files changed, 116 insertions, 41 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 81232b73df8f..578bff9c378b 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -776,6 +776,8 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[NL80211_ATTR_MBSSID_CONFIG] =
NLA_POLICY_NESTED(nl80211_mbssid_config_policy),
[NL80211_ATTR_MBSSID_ELEMS] = { .type = NLA_NESTED },
+ [NL80211_ATTR_RADAR_BACKGROUND] = { .type = NLA_FLAG },
+ [NL80211_ATTR_AP_SETTINGS_FLAGS] = { .type = NLA_U32 },
};
/* policy for the key attributes */
@@ -936,33 +938,37 @@ nl80211_packet_pattern_policy[MAX_NL80211_PKTPAT + 1] = {
[NL80211_PKTPAT_OFFSET] = { .type = NLA_U32 },
};
-int nl80211_prepare_wdev_dump(struct netlink_callback *cb,
- struct cfg80211_registered_device **rdev,
- struct wireless_dev **wdev)
+static int nl80211_prepare_wdev_dump(struct netlink_callback *cb,
+ struct cfg80211_registered_device **rdev,
+ struct wireless_dev **wdev,
+ struct nlattr **attrbuf)
{
int err;
if (!cb->args[0]) {
- struct nlattr **attrbuf;
+ struct nlattr **attrbuf_free = NULL;
- attrbuf = kcalloc(NUM_NL80211_ATTR, sizeof(*attrbuf),
- GFP_KERNEL);
- if (!attrbuf)
- return -ENOMEM;
+ if (!attrbuf) {
+ attrbuf = kcalloc(NUM_NL80211_ATTR, sizeof(*attrbuf),
+ GFP_KERNEL);
+ if (!attrbuf)
+ return -ENOMEM;
+ attrbuf_free = attrbuf;
+ }
err = nlmsg_parse_deprecated(cb->nlh,
GENL_HDRLEN + nl80211_fam.hdrsize,
attrbuf, nl80211_fam.maxattr,
nl80211_policy, NULL);
if (err) {
- kfree(attrbuf);
+ kfree(attrbuf_free);
return err;
}
rtnl_lock();
*wdev = __cfg80211_wdev_from_attrs(NULL, sock_net(cb->skb->sk),
attrbuf);
- kfree(attrbuf);
+ kfree(attrbuf_free);
if (IS_ERR(*wdev)) {
rtnl_unlock();
return PTR_ERR(*wdev);
@@ -3665,14 +3671,16 @@ static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flag
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_P2P_CLIENT:
case NL80211_IFTYPE_ADHOC: {
- const u8 *ssid_ie;
+ const struct element *ssid_elem;
+
if (!wdev->current_bss)
break;
rcu_read_lock();
- ssid_ie = ieee80211_bss_get_ie(&wdev->current_bss->pub,
- WLAN_EID_SSID);
- if (ssid_ie &&
- nla_put(msg, NL80211_ATTR_SSID, ssid_ie[1], ssid_ie + 2))
+ ssid_elem = ieee80211_bss_get_elem(&wdev->current_bss->pub,
+ WLAN_EID_SSID);
+ if (ssid_elem &&
+ nla_put(msg, NL80211_ATTR_SSID, ssid_elem->datalen,
+ ssid_elem->data))
goto nla_put_failure_rcu_locked;
rcu_read_unlock();
break;
@@ -5707,8 +5715,11 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
nl80211_calculate_ap_params(params);
- if (info->attrs[NL80211_ATTR_EXTERNAL_AUTH_SUPPORT])
- params->flags |= AP_SETTINGS_EXTERNAL_AUTH_SUPPORT;
+ if (info->attrs[NL80211_ATTR_AP_SETTINGS_FLAGS])
+ params->flags = nla_get_u32(
+ info->attrs[NL80211_ATTR_AP_SETTINGS_FLAGS]);
+ else if (info->attrs[NL80211_ATTR_EXTERNAL_AUTH_SUPPORT])
+ params->flags |= NL80211_AP_SETTINGS_EXTERNAL_AUTH_SUPPORT;
wdev_lock(wdev);
err = rdev_start_ap(rdev, dev, params);
@@ -6197,7 +6208,7 @@ static int nl80211_dump_station(struct sk_buff *skb,
int sta_idx = cb->args[2];
int err;
- err = nl80211_prepare_wdev_dump(cb, &rdev, &wdev);
+ err = nl80211_prepare_wdev_dump(cb, &rdev, &wdev, NULL);
if (err)
return err;
/* nl80211_prepare_wdev_dump acquired it in the successful case */
@@ -7092,7 +7103,7 @@ static int nl80211_dump_mpath(struct sk_buff *skb,
int path_idx = cb->args[2];
int err;
- err = nl80211_prepare_wdev_dump(cb, &rdev, &wdev);
+ err = nl80211_prepare_wdev_dump(cb, &rdev, &wdev, NULL);
if (err)
return err;
/* nl80211_prepare_wdev_dump acquired it in the successful case */
@@ -7292,7 +7303,7 @@ static int nl80211_dump_mpp(struct sk_buff *skb,
int path_idx = cb->args[2];
int err;
- err = nl80211_prepare_wdev_dump(cb, &rdev, &wdev);
+ err = nl80211_prepare_wdev_dump(cb, &rdev, &wdev, NULL);
if (err)
return err;
/* nl80211_prepare_wdev_dump acquired it in the successful case */
@@ -9270,38 +9281,60 @@ static int nl80211_start_radar_detection(struct sk_buff *skb,
struct cfg80211_chan_def chandef;
enum nl80211_dfs_regions dfs_region;
unsigned int cac_time_ms;
- int err;
+ int err = -EINVAL;
+
+ flush_delayed_work(&rdev->dfs_update_channels_wk);
+
+ wiphy_lock(wiphy);
dfs_region = reg_get_dfs_region(wiphy);
if (dfs_region == NL80211_DFS_UNSET)
- return -EINVAL;
+ goto unlock;
err = nl80211_parse_chandef(rdev, info, &chandef);
if (err)
- return err;
-
- if (netif_carrier_ok(dev))
- return -EBUSY;
-
- if (wdev->cac_started)
- return -EBUSY;
+ goto unlock;
err = cfg80211_chandef_dfs_required(wiphy, &chandef, wdev->iftype);
if (err < 0)
- return err;
+ goto unlock;
- if (err == 0)
- return -EINVAL;
+ if (err == 0) {
+ err = -EINVAL;
+ goto unlock;
+ }
- if (!cfg80211_chandef_dfs_usable(wiphy, &chandef))
- return -EINVAL;
+ if (!cfg80211_chandef_dfs_usable(wiphy, &chandef)) {
+ err = -EINVAL;
+ goto unlock;
+ }
+
+ if (nla_get_flag(info->attrs[NL80211_ATTR_RADAR_BACKGROUND])) {
+ err = cfg80211_start_background_radar_detection(rdev, wdev,
+ &chandef);
+ goto unlock;
+ }
+
+ if (netif_carrier_ok(dev)) {
+ err = -EBUSY;
+ goto unlock;
+ }
+
+ if (wdev->cac_started) {
+ err = -EBUSY;
+ goto unlock;
+ }
/* CAC start is offloaded to HW and can't be started manually */
- if (wiphy_ext_feature_isset(wiphy, NL80211_EXT_FEATURE_DFS_OFFLOAD))
- return -EOPNOTSUPP;
+ if (wiphy_ext_feature_isset(wiphy, NL80211_EXT_FEATURE_DFS_OFFLOAD)) {
+ err = -EOPNOTSUPP;
+ goto unlock;
+ }
- if (!rdev->ops->start_radar_detection)
- return -EOPNOTSUPP;
+ if (!rdev->ops->start_radar_detection) {
+ err = -EOPNOTSUPP;
+ goto unlock;
+ }
cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
if (WARN_ON(!cac_time_ms))
@@ -9314,6 +9347,9 @@ static int nl80211_start_radar_detection(struct sk_buff *skb,
wdev->cac_start_time = jiffies;
wdev->cac_time_ms = cac_time_ms;
}
+unlock:
+ wiphy_unlock(wiphy);
+
return err;
}
@@ -9718,7 +9754,7 @@ static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
int start = cb->args[2], idx = 0;
int err;
- err = nl80211_prepare_wdev_dump(cb, &rdev, &wdev);
+ err = nl80211_prepare_wdev_dump(cb, &rdev, &wdev, NULL);
if (err)
return err;
/* nl80211_prepare_wdev_dump acquired it in the successful case */
@@ -9851,7 +9887,7 @@ static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
if (!attrbuf)
return -ENOMEM;
- res = nl80211_prepare_wdev_dump(cb, &rdev, &wdev);
+ res = nl80211_prepare_wdev_dump(cb, &rdev, &wdev, attrbuf);
if (res) {
kfree(attrbuf);
return res;
@@ -15950,7 +15986,8 @@ static const struct genl_small_ops nl80211_small_ops[] = {
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
.doit = nl80211_start_radar_detection,
.flags = GENL_UNS_ADMIN_PERM,
- .internal_flags = NL80211_FLAG_NEED_NETDEV_UP,
+ .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
+ NL80211_FLAG_NO_WIPHY_MTX,
},
{
.cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
@@ -17031,6 +17068,44 @@ static void nl80211_send_remain_on_chan_event(
nlmsg_free(msg);
}
+void cfg80211_assoc_comeback(struct net_device *netdev,
+ struct cfg80211_bss *bss, u32 timeout)
+{
+ struct wireless_dev *wdev = netdev->ieee80211_ptr;
+ struct wiphy *wiphy = wdev->wiphy;
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+ struct sk_buff *msg;
+ void *hdr;
+
+ trace_cfg80211_assoc_comeback(wdev, bss->bssid, timeout);
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+
+ hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ASSOC_COMEBACK);
+ if (!hdr) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
+ nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
+ nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bss->bssid) ||
+ nla_put_u32(msg, NL80211_ATTR_TIMEOUT, timeout))
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+
+ genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
+ NL80211_MCGRP_MLME, GFP_KERNEL);
+ return;
+
+ nla_put_failure:
+ nlmsg_free(msg);
+}
+EXPORT_SYMBOL(cfg80211_assoc_comeback);
+
void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
struct ieee80211_channel *chan,
unsigned int duration, gfp_t gfp)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.