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cfg80211/nl80211: Notify connection request failure in AP mode

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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@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Pandiyarajan Pitchaimuthu 2012-09-18 16:50:49 +05:30 committed by Johannes Berg
parent 30d08a46ea
commit ed44a951c7
5 changed files with 93 additions and 0 deletions
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24
include/linux/nl80211.h
View File

@ -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 */

19
include/net/cfg80211.h
View File

@ -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

11
net/wireless/mlme.c
View File

@ -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;

34
net/wireless/nl80211.c
View File

@ -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)
{

5
net/wireless/nl80211.h
View File

@ -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,