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Commit ed44a951 authored by Pandiyarajan Pitchaimuthu's avatar Pandiyarajan Pitchaimuthu Committed by Johannes Berg
Browse files

cfg80211/nl80211: Notify connection request failure in AP mode 



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: default avatarPandiyarajan Pitchaimuthu <c_ppitch@qca.qualcomm.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 30d08a46

include/linux/nl80211.h

+24 −0
Original line number Diff line number Diff line
@@ -573,6 +573,11 @@ 
 * @NL80211_CMD_STOP_P2P_DEVICE: Stop the given P2P Device, identified by

 *	its %NL80211_ATTR_WDEV identifier.

 *

 * @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

 */
@@ -719,6 +724,8 @@ enum nl80211_commands { 
	NL80211_CMD_START_P2P_DEVICE,

	NL80211_CMD_STOP_P2P_DEVICE,



	NL80211_CMD_CONN_FAILED,



	/* add new commands above here */



	/* used to define NL80211_CMD_MAX below */
@@ -1262,6 +1269,10 @@ 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

 */
@@ -1517,6 +1528,8 @@ 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,
@@ -3045,4 +3058,15 @@ enum nl80211_probe_resp_offload_support_attr { 
	NL80211_PROBE_RESP_OFFLOAD_SUPPORT_80211U =	1<<3,

};



/**

 * enum nl80211_connect_failed_reason - connection request failed reasons

 * @NL80211_CONN_FAIL_MAX_CLIENTS: Maximum number of clients that can be

 *	handled by the AP is reached.

 * @NL80211_CONN_FAIL_BLOCKED_CLIENT: Client's MAC is in the AP's blocklist.

 */

enum nl80211_connect_failed_reason {

	NL80211_CONN_FAIL_MAX_CLIENTS,

	NL80211_CONN_FAIL_BLOCKED_CLIENT,

};



#endif /* __LINUX_NL80211_H */

include/net/cfg80211.h

+19 −0
Original line number Diff line number Diff line
@@ -3360,6 +3360,25 @@ 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

net/wireless/mlme.c

+11 −0
Original line number Diff line number Diff line
@@ -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;

net/wireless/nl80211.c

+34 −0
Original line number Diff line number Diff line
@@ -8364,6 +8364,40 @@ 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)

{

net/wireless/nl80211.h

+5 −0
Original line number Diff line number Diff line
@@ -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,