In AP mode, when a station requests connection to an AP and if the
request is failed for particular reason, userspace is notified about the
failure through NL80211_CMD_CONN_FAILED command. Reason for the failure
is sent through the attribute NL80211_ATTR_CONN_FAILED_REASON.
Signed-off-by: Pandiyarajan Pitchaimuthu <c_ppitch@xxxxxxxxxxxxxxxx>
---
include/linux/nl80211.h | 31 +++++++++++++++++++++++++++++++
include/net/cfg80211.h | 19 +++++++++++++++++++
net/wireless/mlme.c | 11 +++++++++++
net/wireless/nl80211.c | 34 ++++++++++++++++++++++++++++++++++
net/wireless/nl80211.h | 5 +++++
5 files changed, 100 insertions(+)
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 2f38788..6b27c09 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -565,6 +565,11 @@
* %NL80211_ATTR_IFINDEX is now on %NL80211_ATTR_WIPHY_FREQ with
* %NL80211_ATTR_WIPHY_CHANNEL_TYPE.
*
+ * @NL80211_CMD_CONN_FAILED: connection request to an AP failed; used to
+ * notify userspace that AP has rejected the connection request from a
+ * station, due to particular reason. %NL80211_ATTR_CONN_FAILED_REASON
+ * is used for this.
+ *
* @NL80211_CMD_MAX: highest used command number
* @__NL80211_CMD_AFTER_LAST: internal use
*/
@@ -708,6 +713,8 @@ enum nl80211_commands {
NL80211_CMD_CH_SWITCH_NOTIFY,
+ NL80211_CMD_CONN_FAILED,
+
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */
@@ -1251,6 +1258,10 @@ enum nl80211_commands {
* was used to provide the hint. For the different types of
* allowed user regulatory hints see nl80211_user_reg_hint_type.
*
+ * @NL80211_ATTR_CONN_FAILED_REASON: The reason for which AP has rejected
+ * the connection request from a station. nl80211_connect_failed_reason
+ * enum has different reasons of connection failure.
+ *
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
@@ -1506,6 +1517,8 @@ enum nl80211_attrs {
NL80211_ATTR_USER_REG_HINT_TYPE,
+ NL80211_ATTR_CONN_FAILED_REASON,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@@ -3023,4 +3036,22 @@ enum nl80211_probe_resp_offload_support_attr {
NL80211_PROBE_RESP_OFFLOAD_SUPPORT_80211U = 1<<3,
};
+/**
+ * enum nl80211_connect_failed_reason - The reasons for which an AP could
+ * have rejected the station's connection request. Any of the mentioned
+ * reasons are used with the attribute %NL80211_ATTR_CONN_FAILED_REASON
+ * while sending the event %NL80211_CMD_CONN_FAILED.
+ *
+ * @NL80211_CONN_FAIL_MAX_CLIENTS: AP has already been connected to the
+ * maximum number of stations it can connect. So, new connection is not
+ * possible.
+ * @NL80211_CONN_FAIL_BLOCKED_CLIENT: The requested client's MAC has been
+ * added to the AP's blocklist so as to block this client for new
+ * connection.
+ */
+enum nl80211_connect_failed_reason {
+ NL80211_CONN_FAIL_MAX_CLIENTS,
+ NL80211_CONN_FAIL_BLOCKED_CLIENT,
+};
+
#endif /* __LINUX_NL80211_H */
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 3d254e1..72dff14 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -3342,6 +3342,25 @@ void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp);
/**
+ * cfg80211_conn_failed - connection request failed notification
+ *
+ * @dev: the netdev
+ * @mac_addr: the station's address
+ * @reason: the reason for connection failure
+ * @gfp: allocation flags
+ *
+ * Whenever a station tries to connect to an AP and if the station
+ * could not connect to the AP as the AP has rejected the connection
+ * for some reasons, this function is called.
+ *
+ * The reason for connection failure can be any of the value from
+ * nl80211_connect_failed_reason enum
+ */
+void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
+ enum nl80211_connect_failed_reason reason,
+ gfp_t gfp);
+
+/**
* cfg80211_rx_mgmt - notification of received, unprocessed management frame
* @wdev: wireless device receiving the frame
* @freq: Frequency on which the frame was received in MHz
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index 1cdb1d5..7e3eca5 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -612,6 +612,17 @@ void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
}
EXPORT_SYMBOL(cfg80211_del_sta);
+void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
+ enum nl80211_connect_failed_reason reason,
+ gfp_t gfp)
+{
+ struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
+ struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+
+ nl80211_send_conn_failed_event(rdev, dev, mac_addr, reason, gfp);
+}
+EXPORT_SYMBOL(cfg80211_conn_failed);
+
struct cfg80211_mgmt_registration {
struct list_head list;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 97026f3..db06929 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -8252,6 +8252,40 @@ void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
nlmsg_free(msg);
}
+void nl80211_send_conn_failed_event(struct cfg80211_registered_device *rdev,
+ struct net_device *dev, const u8 *mac_addr,
+ enum nl80211_connect_failed_reason reason,
+ gfp_t gfp)
+{
+ struct sk_buff *msg;
+ void *hdr;
+
+ msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
+ if (!msg)
+ return;
+
+ hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
+ if (!hdr) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
+ nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
+ nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+
+ genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
+ nl80211_mlme_mcgrp.id, gfp);
+ return;
+
+ nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ nlmsg_free(msg);
+}
+
static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
const u8 *addr, gfp_t gfp)
{
diff --git a/net/wireless/nl80211.h b/net/wireless/nl80211.h
index 9f2616f..f615351 100644
--- a/net/wireless/nl80211.h
+++ b/net/wireless/nl80211.h
@@ -91,6 +91,11 @@ void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
struct net_device *dev, const u8 *mac_addr,
gfp_t gfp);
+void nl80211_send_conn_failed_event(struct cfg80211_registered_device *rdev,
+ struct net_device *dev, const u8 *mac_addr,
+ enum nl80211_connect_failed_reason reason,
+ gfp_t gfp);
+
int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev, u32 nlpid,
int freq, int sig_dbm,
--
1.7.9.5
--
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