Make IEEE 802.11 IE parser aware of P2P IE

This does not handle fragmented IEs and is only used to check quickly
whether the IE blob includes any P2P IE(s).

src/common/ieee802_11_common.c

@@ -96,6 +96,22 @@ static int ieee802_11_parse_vendor_specific(const u8 *pos, size_t elen,
 		}
 		break;
 
+	case OUI_WFA:
+		switch (pos[3]) {
+		case P2P_OUI_TYPE:
+			/* Wi-Fi Alliance - P2P IE */
+			elems->p2p = pos;
+			elems->p2p_len = elen;
+			break;
+		default:
+			wpa_printf(MSG_MSGDUMP, "Unknown WFA "
+				   "information element ignored "
+				   "(type=%d len=%lu)\n",
+				   pos[3], (unsigned long) elen);
+			return -1;
+		}
+		break;
+
 	case OUI_BROADCOM:
 		switch (pos[3]) {
 		case VENDOR_HT_CAPAB_OUI_TYPE:

src/common/ieee802_11_common.h

@@ -40,6 +40,7 @@ struct ieee802_11_elems {
 	const u8 *ht_capabilities;
 	const u8 *ht_operation;
 	const u8 *vendor_ht_cap;
+	const u8 *p2p;
 
 	u8 ssid_len;
 	u8 supp_rates_len;
@@ -64,6 +65,7 @@ struct ieee802_11_elems {
 	u8 ht_capabilities_len;
 	u8 ht_operation_len;
 	u8 vendor_ht_cap_len;
+	u8 p2p_len;
 };
 
 typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;