Commit 6a671a50 authored by Denis Kenzior's avatar Denis Kenzior Committed by Johannes Berg

nl80211: Add CMD_CONTROL_PORT_FRAME API

This commit also adds cfg80211_rx_control_port function.  This is used
to generate a CMD_CONTROL_PORT_FRAME event out to userspace.  The
conn_owner_nlportid is used as the unicast destination.  This means that
userspace must specify NL80211_ATTR_SOCKET_OWNER flag if control port
over nl80211 routing is requested in NL80211_CMD_CONNECT,
NL80211_CMD_ASSOCIATE, NL80211_CMD_START_AP or IBSS/mesh join.
Signed-off-by: default avatarDenis Kenzior <denkenz@gmail.com>
[johannes: fix return value of cfg80211_rx_control_port()]
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 4d191c75
...@@ -5721,6 +5721,28 @@ void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie, ...@@ -5721,6 +5721,28 @@ void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
const u8 *buf, size_t len, bool ack, gfp_t gfp); const u8 *buf, size_t len, bool ack, gfp_t gfp);
/**
* cfg80211_rx_control_port - notification about a received control port frame
* @dev: The device the frame matched to
* @buf: control port frame
* @len: length of the frame data
* @addr: The peer from which the frame was received
* @proto: frame protocol, typically PAE or Pre-authentication
* @unencrypted: Whether the frame was received unencrypted
*
* This function is used to inform userspace about a received control port
* frame. It should only be used if userspace indicated it wants to receive
* control port frames over nl80211.
*
* The frame is the data portion of the 802.3 or 802.11 data frame with all
* network layer headers removed (e.g. the raw EAPoL frame).
*
* Return: %true if the frame was passed to userspace
*/
bool cfg80211_rx_control_port(struct net_device *dev,
const u8 *buf, size_t len,
const u8 *addr, u16 proto, bool unencrypted);
/** /**
* cfg80211_cqm_rssi_notify - connection quality monitoring rssi event * cfg80211_cqm_rssi_notify - connection quality monitoring rssi event
* @dev: network device * @dev: network device
......
...@@ -990,6 +990,17 @@ ...@@ -990,6 +990,17 @@
* &NL80211_CMD_CONNECT or &NL80211_CMD_ROAM. If the 4 way handshake failed * &NL80211_CMD_CONNECT or &NL80211_CMD_ROAM. If the 4 way handshake failed
* &NL80211_CMD_DISCONNECT should be indicated instead. * &NL80211_CMD_DISCONNECT should be indicated instead.
* *
* @NL80211_CMD_CONTROL_PORT_FRAME: Control Port (e.g. PAE) frame TX request
* and RX notification. This command is used both as a request to transmit
* a control port frame and as a notification that a control port frame
* has been received. %NL80211_ATTR_FRAME is used to specify the
* frame contents. The frame is the raw EAPoL data, without ethernet or
* 802.11 headers.
* When used as an event indication %NL80211_ATTR_CONTROL_PORT_ETHERTYPE,
* %NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT and %NL80211_ATTR_MAC are added
* indicating the protocol type of the received frame; whether the frame
* was received unencrypted and the MAC address of the peer respectively.
*
* @NL80211_CMD_RELOAD_REGDB: Request that the regdb firmware file is reloaded. * @NL80211_CMD_RELOAD_REGDB: Request that the regdb firmware file is reloaded.
* *
* @NL80211_CMD_EXTERNAL_AUTH: This interface is exclusively defined for host * @NL80211_CMD_EXTERNAL_AUTH: This interface is exclusively defined for host
...@@ -1228,6 +1239,8 @@ enum nl80211_commands { ...@@ -1228,6 +1239,8 @@ enum nl80211_commands {
NL80211_CMD_STA_OPMODE_CHANGED, NL80211_CMD_STA_OPMODE_CHANGED,
NL80211_CMD_CONTROL_PORT_FRAME,
/* add new commands above here */ /* add new commands above here */
/* used to define NL80211_CMD_MAX below */ /* used to define NL80211_CMD_MAX below */
......
...@@ -14553,6 +14553,64 @@ void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie, ...@@ -14553,6 +14553,64 @@ void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
} }
EXPORT_SYMBOL(cfg80211_mgmt_tx_status); EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
static int __nl80211_rx_control_port(struct net_device *dev,
const u8 *buf, size_t len,
const u8 *addr, u16 proto,
bool unencrypted, gfp_t gfp)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct sk_buff *msg;
void *hdr;
u32 nlportid = READ_ONCE(wdev->conn_owner_nlportid);
if (!nlportid)
return -ENOENT;
msg = nlmsg_new(100 + len, gfp);
if (!msg)
return -ENOMEM;
hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONTROL_PORT_FRAME);
if (!hdr) {
nlmsg_free(msg);
return -ENOBUFS;
}
if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
NL80211_ATTR_PAD) ||
nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
nla_put_u16(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE, proto) ||
(unencrypted && nla_put_flag(msg,
NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT)))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
nla_put_failure:
nlmsg_free(msg);
return -ENOBUFS;
}
bool cfg80211_rx_control_port(struct net_device *dev,
const u8 *buf, size_t len,
const u8 *addr, u16 proto, bool unencrypted)
{
int ret;
trace_cfg80211_rx_control_port(dev, buf, len, addr, proto, unencrypted);
ret = __nl80211_rx_control_port(dev, buf, len, addr, proto,
unencrypted, GFP_ATOMIC);
trace_cfg80211_return_bool(ret == 0);
return ret == 0;
}
EXPORT_SYMBOL(cfg80211_rx_control_port);
static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev, static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
const char *mac, gfp_t gfp) const char *mac, gfp_t gfp)
{ {
......
...@@ -2600,6 +2600,27 @@ TRACE_EVENT(cfg80211_mgmt_tx_status, ...@@ -2600,6 +2600,27 @@ TRACE_EVENT(cfg80211_mgmt_tx_status,
WDEV_PR_ARG, __entry->cookie, BOOL_TO_STR(__entry->ack)) WDEV_PR_ARG, __entry->cookie, BOOL_TO_STR(__entry->ack))
); );
TRACE_EVENT(cfg80211_rx_control_port,
TP_PROTO(struct net_device *netdev, const u8 *buf, size_t len,
const u8 *addr, u16 proto, bool unencrypted),
TP_ARGS(netdev, buf, len, addr, proto, unencrypted),
TP_STRUCT__entry(
NETDEV_ENTRY
MAC_ENTRY(addr)
__field(u16, proto)
__field(bool, unencrypted)
),
TP_fast_assign(
NETDEV_ASSIGN;
MAC_ASSIGN(addr, addr);
__entry->proto = proto;
__entry->unencrypted = unencrypted;
),
TP_printk(NETDEV_PR_FMT ", " MAC_PR_FMT " proto: 0x%x, unencrypted: %s",
NETDEV_PR_ARG, MAC_PR_ARG(addr),
__entry->proto, BOOL_TO_STR(__entry->unencrypted))
);
TRACE_EVENT(cfg80211_cqm_rssi_notify, TRACE_EVENT(cfg80211_cqm_rssi_notify,
TP_PROTO(struct net_device *netdev, TP_PROTO(struct net_device *netdev,
enum nl80211_cqm_rssi_threshold_event rssi_event, enum nl80211_cqm_rssi_threshold_event rssi_event,
......
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