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nl80211: Add an option to specify the BSSID to scan for

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This allows scans to be optimized when a response is needed only from a
single, known BSS.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2016-02-26 16:31:33 +02:00 • committed by Jouni Malinen
parent 452874a9df
commit eb20cea590
3 changed files with 29 additions and 0 deletions
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9
src/drivers/driver.h
View file

@ -439,6 +439,15 @@ struct wpa_driver_scan_params {
*/ */
unsigned int sched_scan_plans_num; unsigned int sched_scan_plans_num;
/**
* bssid - Specific BSSID to scan for
*
* This optional parameter can be used to replace the default wildcard
* BSSID with a specific BSSID to scan for if results are needed from
* only a single BSS.
*/
const u8 *bssid;
/* /*
* NOTE: Whenever adding new parameters here, please make sure * NOTE: Whenever adding new parameters here, please make sure
* wpa_scan_clone_params() and wpa_scan_free_params() get updated with * wpa_scan_clone_params() and wpa_scan_free_params() get updated with

7
src/drivers/driver_nl80211_scan.c
View file

@ -257,6 +257,13 @@ int wpa_driver_nl80211_scan(struct i802_bss *bss,
goto fail; goto fail;
} }
if (params->bssid) {
wpa_printf(MSG_DEBUG, "nl80211: Scan for a specific BSSID: "
MACSTR, MAC2STR(params->bssid));
if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid))
goto fail;
}
ret = send_and_recv_msgs(drv, msg, NULL, NULL); ret = send_and_recv_msgs(drv, msg, NULL, NULL);
msg = NULL; msg = NULL;
if (ret) { if (ret) {

13
wpa_supplicant/scan.c
View file

@ -2259,6 +2259,17 @@ wpa_scan_clone_params(const struct wpa_driver_scan_params *src)
params->mac_addr_mask = mac_addr + ETH_ALEN; params->mac_addr_mask = mac_addr + ETH_ALEN;
} }
} }
if (src->bssid) {
u8 *bssid;
bssid = os_malloc(ETH_ALEN);
if (!bssid)
goto failed;
os_memcpy(bssid, src->bssid, ETH_ALEN);
params->bssid = bssid;
}
return params; return params;
failed: failed:
@ -2287,6 +2298,8 @@ void wpa_scan_free_params(struct wpa_driver_scan_params *params)
*/ */
os_free((u8 *) params->mac_addr); os_free((u8 *) params->mac_addr);
os_free((u8 *) params->bssid);
os_free(params); os_free(params);
} }