Piteball
/
android_kernel_samsung_msm8976
mirror of https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
1
1
Fork 0
Code Issues Projects Releases Wiki Activity

cfg80211: Allow a scan request for a specific BSSID 

This allows scans for a specific BSSID to be optimized by the user space
application by requesting the driver to set the Probe Request frame
BSSID field (Address 3) to the specified BSSID instead of the wildcard
BSSID. This prevents other APs from replying which reduces airtime need
and latency in getting the response from the target AP through.

This is an optimization and as such, it is acceptable for some of the
drivers not to support the mechanism. If not supported, the wildcard
BSSID will be used and more responses may be received.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Git-commit: 0889675a9503f48d1ad01b4eaa202f89469b2b62
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Change-Id: I20cf654661c11880055d022e0c9ec77beab659e8
CRs-fixed: 996660
Signed-off-by: Vidyullatha Kanchanapally <vidyullatha@codeaurora.org>
This commit is contained in:
Jouni Malinen 2016-02-26 22:12:47 +02:00 committed by Ashwini Patil
parent ad26484ca8
commit b094ea07e7
5 changed files with 16 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/net/cfg80211.h
View File

@ -1281,6 +1281,7 @@ struct cfg80211_ssid {
* @wdev: the wireless device to scan for
* @aborted: (internal) scan request was notified as aborted
* @no_cck: used to send probe requests at non CCK rate in 2GHz band
* @bssid: BSSID to scan for (most commonly, the wildcard BSSID)
*/
struct cfg80211_scan_request {
struct cfg80211_ssid *ssids;
@ -1294,6 +1295,8 @@ struct cfg80211_scan_request {
struct wireless_dev *wdev;
u8 bssid[ETH_ALEN] __aligned(2);
/* internal */
struct wiphy *wiphy;
unsigned long scan_start;

4
include/uapi/linux/nl80211.h
View File

@ -263,7 +263,9 @@
* @NL80211_CMD_GET_SCAN: get scan results
* @NL80211_CMD_TRIGGER_SCAN: trigger a new scan with the given parameters
* %NL80211_ATTR_TX_NO_CCK_RATE is used to decide whether to send the
* probe requests at CCK rate or not.
* probe requests at CCK rate or not. %NL80211_ATTR_MAC can be used to
* specify a BSSID to scan for; if not included, the wildcard BSSID will
* be used.
* @NL80211_CMD_NEW_SCAN_RESULTS: scan notification (as a reply to
* NL80211_CMD_GET_SCAN and on the "scan" multicast group)
* @NL80211_CMD_SCAN_ABORTED: scan was aborted, for unspecified reasons,

6
net/wireless/nl80211.c
View File

@ -5426,6 +5426,12 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
request->no_cck =
nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
if (info->attrs[NL80211_ATTR_MAC])
memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
ETH_ALEN);
else
eth_broadcast_addr(request->bssid);
request->wdev = wdev;
request->wiphy = &rdev->wiphy;
request->scan_start = jiffies;

2
net/wireless/scan.c
View File

@ -1159,6 +1159,8 @@ int cfg80211_wext_siwscan(struct net_device *dev,
if (wiphy->bands[i])
creq->rates[i] = (1 << wiphy->bands[i]->n_bitrates) - 1;
eth_broadcast_addr(creq->bssid);
rdev->scan_req = creq;
err = rdev_scan(rdev, creq);
if (err) {

2
net/wireless/sme.c
View File

@ -172,6 +172,8 @@ static int cfg80211_conn_scan(struct wireless_dev *wdev)
wdev->conn->params.ssid_len);
request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
eth_broadcast_addr(request->bssid);
request->wdev = wdev;
request->wiphy = &rdev->wiphy;
request->scan_start = jiffies;