nl80211: Basic support for PBSS/PCP

PBSS (Personal Basic Service Set) is a new BSS type for DMG
networks. It is similar to infrastructure BSS, having an AP-like
entity called PCP (PBSS Control Point), but it has few differences.
PBSS support is mandatory for IEEE 802.11ad devices.

Add a pbss flag to the relevant structures to support starting a PCP and
connecting to a PCP. Implement support in the nl80211 driver by using
the new PBSS flag attribute.

Signed-off-by: Lior David <qca_liord@qca.qualcomm.com>

src/drivers/driver.h

@@ -860,6 +860,12 @@ struct wpa_driver_associate_params {
 	 * RRM (Radio Resource Measurements)
 	 */
 	int rrm_used;
+
+	/**
+	 * pbss - If set, connect to a PCP in a PBSS. Otherwise, connect to an
+	 * AP as usual. Valid for DMG network only.
+	 */
+	int pbss;
 };
 
 enum hide_ssid {
@@ -1087,6 +1093,12 @@ struct wpa_driver_ap_params {
 	 * reenable - Whether this is to re-enable beaconing
 	 */
 	int reenable;
+
+	/**
+	 * pbss - Whether to start a PCP (in PBSS) instead of an AP in
+	 * infrastructure BSS. Valid only for DMG network.
+	 */
+	int pbss;
 };
 
 struct wpa_driver_mesh_bss_params {

src/drivers/driver_nl80211.c

@@ -3584,6 +3584,12 @@ static int wpa_driver_nl80211_set_ap(void *priv,
 	}
 #endif /* CONFIG_P2P */
 
+	if (params->pbss) {
+		wpa_printf(MSG_DEBUG, "nl80211: PBSS");
+		if (nla_put_flag(msg, NL80211_ATTR_PBSS))
+			goto fail;
+	}
+
 	ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 	if (ret) {
 		wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
@@ -4744,6 +4750,12 @@ static int nl80211_connect_common(struct wpa_driver_nl80211_data *drv,
 	if (params->p2p)
 		wpa_printf(MSG_DEBUG, "  * P2P group");
 
+	if (params->pbss) {
+		wpa_printf(MSG_DEBUG, "  * PBSS");
+		if (nla_put_flag(msg, NL80211_ATTR_PBSS))
+			return -1;
+	}
+
 	return 0;
 }