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

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>
Git-commit: 81948527fce52c73c9a0742b8ec8d26b97f6c3c0
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git
Change-Id: I5dc58b360b2bbce53493466a0bcd5363276c302a
CRs-fixed: 1008791
Signed-off-by: Vidyullatha Kanchanapally <vidyullatha@codeaurora.org>
This commit is contained in:
Kanchanapally, Vidyullatha 2016-04-11 15:16:01 +05:30 committed by Ashwini Patil
parent 1bb5f2e905
commit b2270d9ce1
5 changed files with 59 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

@ -137,6 +137,7 @@
!Finclude/net/cfg80211.h __cfg80211_send_disassoc
!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

@ -4019,6 +4019,32 @@ 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
*
@ -4036,10 +4062,15 @@ 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

@ -223,6 +223,7 @@ 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 {

27
net/wireless/sme.c
View File

@ -569,10 +569,11 @@ 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_dev(wdev->wiphy);
@ -580,10 +581,21 @@ void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
unsigned long flags;
CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);
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)
@ -598,6 +610,9 @@ 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);
@ -605,7 +620,7 @@ 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);
void __cfg80211_roamed(struct wireless_dev *wdev,
struct cfg80211_bss *bss,

2
net/wireless/util.c
View File

@ -775,7 +775,7 @@ 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,