nl80211: Identify if nl80211 is capable of P2P Device abstraction

Check the supported interfaces attribute to identify support for
a dedicated P2P Device interface type. If set, update the driver
capabilities flag to notify the supplicant.

Signed-off-by: David Spinadel <david.spinadel@intel.com>

src/drivers/driver.h

@@ -830,7 +830,7 @@ struct wpa_driver_capa {
  * it cannot be used for P2P group operations or non-P2P purposes.
  */
 #define WPA_DRIVER_FLAGS_P2P_DEDICATED_INTERFACE	0x00000400
-/* This interface is P2P capable (P2P Device, GO, or P2P Client */
+/* This interface is P2P capable (P2P GO or P2P Client) */
 #define WPA_DRIVER_FLAGS_P2P_CAPABLE	0x00000800
 /* Driver supports concurrent operations on multiple channels */
 #define WPA_DRIVER_FLAGS_MULTI_CHANNEL_CONCURRENT	0x00001000
@@ -874,6 +874,8 @@ struct wpa_driver_capa {
 #define WPA_DRIVER_FLAGS_IBSS				0x08000000
 /* Driver supports radar detection */
 #define WPA_DRIVER_FLAGS_RADAR				0x10000000
+/* Driver supports a dedicated interface for P2P Device */
+#define WPA_DRIVER_FLAGS_DEDICATED_P2P_DEVICE		0x20000000
 	unsigned int flags;
 
 	int max_scan_ssids;
@@ -1013,7 +1015,13 @@ enum wpa_driver_if_type {
 	 * WPA_IF_P2P_GROUP - P2P Group interface (will become either
 	 * WPA_IF_P2P_GO or WPA_IF_P2P_CLIENT, but the role is not yet known)
 	 */
-	WPA_IF_P2P_GROUP
+	WPA_IF_P2P_GROUP,
+
+	/**
+	 * WPA_IF_P2P_DEVICE - P2P Device interface is used to indentify the
+	 * abstracted P2P Device function in the driver
+	 */
+	WPA_IF_P2P_DEVICE
 };
 
 struct wpa_init_params {

src/drivers/driver_nl80211.c

@@ -2813,6 +2813,10 @@ static void wiphy_info_supported_iftypes(struct wiphy_info_data *info,
 		case NL80211_IFTYPE_ADHOC:
 			info->capa->flags |= WPA_DRIVER_FLAGS_IBSS;
 			break;
+		case NL80211_IFTYPE_P2P_DEVICE:
+			info->capa->flags |=
+				WPA_DRIVER_FLAGS_DEDICATED_P2P_DEVICE;
+			break;
 		case NL80211_IFTYPE_P2P_GO:
 			info->p2p_go_supported = 1;
 			break;
@@ -6511,6 +6515,8 @@ static const char * nl80211_iftype_str(enum nl80211_iftype mode)
 		return "P2P_CLIENT";
 	case NL80211_IFTYPE_P2P_GO:
 		return "P2P_GO";
+	case NL80211_IFTYPE_P2P_DEVICE:
+		return "P2P_DEVICE";
 	default:
 		return "unknown";
 	}
@@ -8676,6 +8682,8 @@ static enum nl80211_iftype wpa_driver_nl80211_if_type(
 		return NL80211_IFTYPE_AP;
 	case WPA_IF_P2P_GO:
 		return NL80211_IFTYPE_P2P_GO;
+	case WPA_IF_P2P_DEVICE:
+		return NL80211_IFTYPE_P2P_DEVICE;
 	}
 	return -1;
 }