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nl80211: sched_scan relative RSSI parameters

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Add driver interface support to set sched_scan relative RSSI parameters
and to indicate driver support for this.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
vamsi krishna 2016-11-15 15:12:44 +05:30 committed by Jouni Malinen
parent 37e9f511eb
commit 20c846d9ee
3 changed files with 68 additions and 0 deletions
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32
src/drivers/driver.h
View file

@ -495,6 +495,36 @@ struct wpa_driver_scan_params {
*/
unsigned int duration_mandatory:1;
/**
* relative_rssi_set - Whether relative RSSI parameters are set
*/
unsigned int relative_rssi_set:1;
/**
* relative_rssi - Relative RSSI for reporting better BSSs
*
* Amount of RSSI by which a BSS should be better than the current
* connected BSS to report the new BSS to user space.
*/
s8 relative_rssi;
/**
* relative_adjust_band - Band to which RSSI should be adjusted
*
* The relative_adjust_rssi should be added to the band specified
* by relative_adjust_band.
*/
enum set_band relative_adjust_band;
/**
* relative_adjust_rssi - RSSI to be added to relative_adjust_band
*
* An amount of relative_band_rssi should be added to the BSSs that
* belong to the band specified by relative_adjust_band while comparing
* with other bands for BSS reporting.
*/
s8 relative_adjust_rssi;
/*
* NOTE: Whenever adding new parameters here, please make sure
* wpa_scan_clone_params() and wpa_scan_free_params() get updated with
@ -1397,6 +1427,8 @@ struct wpa_driver_capa {
#define WPA_DRIVER_FLAGS_MGMT_TX_RANDOM_TA 0x0000400000000000ULL
/** Driver supports mgmt_tx with random TX addr in connected state */
#define WPA_DRIVER_FLAGS_MGMT_TX_RANDOM_TA_CONNECTED 0x0000800000000000ULL
/** Driver supports better BSS reporting with sched_scan in connected mode */
#define WPA_DRIVER_FLAGS_SCHED_SCAN_RELATIVE_RSSI 0x0001000000000000ULL
u64 flags;
#define FULL_AP_CLIENT_STATE_SUPP(drv_flags) \

3
src/drivers/driver_nl80211_capa.c
View file

@ -395,6 +395,9 @@ static void wiphy_info_ext_feature_flags(struct wiphy_info_data *info,
if (ext_feature_isset(ext_features, len,
NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA_CONNECTED))
capa->flags |= WPA_DRIVER_FLAGS_MGMT_TX_RANDOM_TA_CONNECTED;
if (ext_feature_isset(ext_features, len,
NL80211_EXT_FEATURE_SCHED_SCAN_RELATIVE_RSSI))
capa->flags |= WPA_DRIVER_FLAGS_SCHED_SCAN_RELATIVE_RSSI;
}

33
src/drivers/driver_nl80211_scan.c
View file

@ -562,6 +562,39 @@ int wpa_driver_nl80211_sched_scan(void *priv,
nla_nest_end(msg, match_sets);
}
if (params->relative_rssi_set) {
struct nl80211_bss_select_rssi_adjust rssi_adjust;
os_memset(&rssi_adjust, 0, sizeof(rssi_adjust));
wpa_printf(MSG_DEBUG, "nl80211: Relative RSSI: %d",
params->relative_rssi);
if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI,
params->relative_rssi))
goto fail;
if (params->relative_adjust_rssi) {
int pref_band_set = 1;
switch (params->relative_adjust_band) {
case WPA_SETBAND_5G:
rssi_adjust.band = NL80211_BAND_5GHZ;
break;
case WPA_SETBAND_2G:
rssi_adjust.band = NL80211_BAND_2GHZ;
break;
default:
pref_band_set = 0;
break;
}
rssi_adjust.delta = params->relative_adjust_rssi;
if (pref_band_set &&
nla_put(msg, NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST,
sizeof(rssi_adjust), &rssi_adjust))
goto fail;
}
}
ret = send_and_recv_msgs(drv, msg, NULL, NULL);
/* TODO: if we get an error here, we should fall back to normal scan */