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cfg80211: Add option to report the bss entry in connect result

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Since cfg80211 maintains separate BSS table entries for APs if the same
BSSID, SSID pair is seen on multiple channels, it is possible that it
can map the current_bss to a BSS entry on the wrong channel. This
current_bss will not get flushed unless disconnected and cfg80211
reports a wrong channel as the associated channel.

Fix this by introducing a new cfg80211_connect_bss() function which is
similar to cfg80211_connect_result(), but it includes an additional
parameter: the bss the STA is connected to. This allows drivers to
provide the exact bss entry that matches the BSS to which the connection
was completed.

Reviewed-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Vidyullatha Kanchanapally <vkanchan@qti.qualcomm.com>
Signed-off-by: Sunil Dutt <usdutt@qti.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Kanchanapally, Vidyullatha 2016-04-11 15:16:01 +05:30 committed by Johannes Berg
parent 739960f128
commit e705498945
5 changed files with 60 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Documentation/DocBook/80211.tmpl
View File

@ -135,6 +135,7 @@
!Finclude/net/cfg80211.h cfg80211_tx_mlme_mgmt
!Finclude/net/cfg80211.h cfg80211_ibss_joined
!Finclude/net/cfg80211.h cfg80211_connect_result
!Finclude/net/cfg80211.h cfg80211_connect_bss
!Finclude/net/cfg80211.h cfg80211_roamed
!Finclude/net/cfg80211.h cfg80211_disconnected
!Finclude/net/cfg80211.h cfg80211_ready_on_channel

39
include/net/cfg80211.h
View File

@ -4651,6 +4651,32 @@ static inline void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
#define CFG80211_TESTMODE_DUMP(cmd)
#endif
/**
* cfg80211_connect_bss - notify cfg80211 of connection result
*
* @dev: network device
* @bssid: the BSSID of the AP
* @bss: entry of bss to which STA got connected to, can be obtained
* through cfg80211_get_bss (may be %NULL)
* @req_ie: association request IEs (maybe be %NULL)
* @req_ie_len: association request IEs length
* @resp_ie: association response IEs (may be %NULL)
* @resp_ie_len: assoc response IEs length
* @status: status code, 0 for successful connection, use
* %WLAN_STATUS_UNSPECIFIED_FAILURE if your device cannot give you
* the real status code for failures.
* @gfp: allocation flags
*
* It should be called by the underlying driver whenever connect() has
* succeeded. This is similar to cfg80211_connect_result(), but with the
* option of identifying the exact bss entry for the connection. Only one of
* these functions should be called.
*/
void cfg80211_connect_bss(struct net_device *dev, const u8 *bssid,
struct cfg80211_bss *bss, const u8 *req_ie,
size_t req_ie_len, const u8 *resp_ie,
size_t resp_ie_len, u16 status, gfp_t gfp);
/**
* cfg80211_connect_result - notify cfg80211 of connection result
*
@ -4668,10 +4694,15 @@ static inline void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
* It should be called by the underlying driver whenever connect() has
* succeeded.
*/
void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
const u8 *req_ie, size_t req_ie_len,
const u8 *resp_ie, size_t resp_ie_len,
u16 status, gfp_t gfp);
static inline void
cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
const u8 *req_ie, size_t req_ie_len,
const u8 *resp_ie, size_t resp_ie_len,
u16 status, gfp_t gfp)
{
cfg80211_connect_bss(dev, bssid, NULL, req_ie, req_ie_len, resp_ie,
resp_ie_len, status, gfp);
}
/**
* cfg80211_roamed - notify cfg80211 of roaming

1
net/wireless/core.h
View File

@ -214,6 +214,7 @@ struct cfg80211_event {
const u8 *resp_ie;
size_t req_ie_len;
size_t resp_ie_len;
struct cfg80211_bss *bss;
u16 status;
} cr;
struct {

28
net/wireless/sme.c
View File

@ -753,19 +753,32 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
kfree(country_ie);
}
void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
const u8 *req_ie, size_t req_ie_len,
const u8 *resp_ie, size_t resp_ie_len,
u16 status, gfp_t gfp)
/* Consumes bss object one way or another */
void cfg80211_connect_bss(struct net_device *dev, const u8 *bssid,
struct cfg80211_bss *bss, const u8 *req_ie,
size_t req_ie_len, const u8 *resp_ie,
size_t resp_ie_len, u16 status, gfp_t gfp)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct cfg80211_event *ev;
unsigned long flags;
if (bss) {
/* Make sure the bss entry provided by the driver is valid. */
struct cfg80211_internal_bss *ibss = bss_from_pub(bss);
if (WARN_ON(list_empty(&ibss->list))) {
cfg80211_put_bss(wdev->wiphy, bss);
return;
}
}
ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
if (!ev)
if (!ev) {
cfg80211_put_bss(wdev->wiphy, bss);
return;
}
ev->type = EVENT_CONNECT_RESULT;
if (bssid)
@ -780,6 +793,9 @@ void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
ev->cr.resp_ie_len = resp_ie_len;
memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
}
if (bss)
cfg80211_hold_bss(bss_from_pub(bss));
ev->cr.bss = bss;
ev->cr.status = status;
spin_lock_irqsave(&wdev->event_lock, flags);
@ -787,7 +803,7 @@ void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
spin_unlock_irqrestore(&wdev->event_lock, flags);
queue_work(cfg80211_wq, &rdev->event_work);
}
EXPORT_SYMBOL(cfg80211_connect_result);
EXPORT_SYMBOL(cfg80211_connect_bss);
/* Consumes bss object one way or another */
void __cfg80211_roamed(struct wireless_dev *wdev,

2
net/wireless/util.c
View File

@ -950,7 +950,7 @@ void cfg80211_process_wdev_events(struct wireless_dev *wdev)
ev->cr.resp_ie, ev->cr.resp_ie_len,
ev->cr.status,
ev->cr.status == WLAN_STATUS_SUCCESS,
NULL);
ev->cr.bss);
break;
case EVENT_ROAMED:
__cfg80211_roamed(wdev, ev->rm.bss, ev->rm.req_ie,