nl80211: Handle MAC address randomization in scan/sched_scan

1. Process supported driver capabilities.
2. Populate scan request with MAC address randomization data

Signed-off-by: Ilan Peer <ilan.peer@intel.com>

src/drivers/driver_nl80211.c

@@ -7310,7 +7310,9 @@ static int wpa_driver_nl80211_status(void *priv, char *buf, size_t buflen)
 				  "capa.max_stations=%u\n"
 				  "capa.probe_resp_offloads=0x%x\n"
 				  "capa.max_acl_mac_addrs=%u\n"
-				  "capa.num_multichan_concurrent=%u\n",
+				  "capa.num_multichan_concurrent=%u\n"
+				  "capa.mac_addr_rand_sched_scan_supported=%d\n"
+				  "capa.mac_addr_rand_scan_supported=%d\n",
 				  drv->capa.key_mgmt,
 				  drv->capa.enc,
 				  drv->capa.auth,
@@ -7324,7 +7326,9 @@ static int wpa_driver_nl80211_status(void *priv, char *buf, size_t buflen)
 				  drv->capa.max_stations,
 				  drv->capa.probe_resp_offloads,
 				  drv->capa.max_acl_mac_addrs,
-				  drv->capa.num_multichan_concurrent);
+				  drv->capa.num_multichan_concurrent,
+				  drv->capa.mac_addr_rand_sched_scan_supported,
+				  drv->capa.mac_addr_rand_scan_supported);
 		if (os_snprintf_error(end - pos, res))
 			return pos - buf;
 		pos += res;

src/drivers/driver_nl80211_capa.c

@@ -76,6 +76,8 @@ struct wiphy_info_data {
 	unsigned int set_qos_map_supported:1;
 	unsigned int have_low_prio_scan:1;
 	unsigned int wmm_ac_supported:1;
+	unsigned int mac_addr_rand_scan_supported:1;
+	unsigned int mac_addr_rand_sched_scan_supported:1;
 };
 
 
@@ -366,6 +368,12 @@ static void wiphy_info_feature_flags(struct wiphy_info_data *info,
 	if (flags & NL80211_FEATURE_LOW_PRIORITY_SCAN)
 		info->have_low_prio_scan = 1;
 
+	if (flags & NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)
+		info->mac_addr_rand_scan_supported = 1;
+
+	if (flags & NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR)
+		info->mac_addr_rand_sched_scan_supported = 1;
+
 	if (flags & NL80211_FEATURE_STATIC_SMPS)
 		capa->smps_modes |= WPA_DRIVER_SMPS_MODE_STATIC;
 
@@ -635,6 +643,11 @@ static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
 		drv->capa.flags |= WPA_DRIVER_FLAGS_AP_CSA;
 	drv->capa.wmm_ac_supported = info->wmm_ac_supported;
 
+	drv->capa.mac_addr_rand_sched_scan_supported =
+		info->mac_addr_rand_sched_scan_supported;
+	drv->capa.mac_addr_rand_scan_supported =
+		info->mac_addr_rand_scan_supported;
+
 	return 0;
 }
 

src/drivers/driver_nl80211_scan.c

@@ -171,6 +171,28 @@ nl80211_scan_common(struct i802_bss *bss, u8 cmd,
 		scan_flags |= NL80211_SCAN_FLAG_LOW_PRIORITY;
 	}
 
+	if (params->mac_addr_rand) {
+		wpa_printf(MSG_DEBUG,
+			   "nl80211: Add NL80211_SCAN_FLAG_RANDOM_ADDR");
+		scan_flags |= NL80211_SCAN_FLAG_RANDOM_ADDR;
+
+		if (params->mac_addr) {
+			wpa_printf(MSG_DEBUG, "nl80211: MAC address: " MACSTR,
+				   MAC2STR(params->mac_addr));
+			if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN,
+				    params->mac_addr))
+				goto fail;
+		}
+
+		if (params->mac_addr_mask) {
+			wpa_printf(MSG_DEBUG, "nl80211: MAC address mask: "
+				   MACSTR, MAC2STR(params->mac_addr_mask));
+			if (nla_put(msg, NL80211_ATTR_MAC_MASK, ETH_ALEN,
+				    params->mac_addr_mask))
+				goto fail;
+		}
+	}
+
 	if (scan_flags &&
 	    nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, scan_flags))
 		goto fail;