wlantest: Add support for decrypting TDLS frames

Derive TPK based on TDLS TPK Handshake and decrypt frames on the
direct link with TPK-TK.

src/common/ieee802_11_common.c

@@ -254,6 +254,11 @@ ParseRes ieee802_11_parse_elems(const u8 *start, size_t len,
 			elems->ht_operation = pos;
 			elems->ht_operation_len = elen;
 			break;
+		case WLAN_EID_LINK_ID:
+			if (elen < 18)
+				break;
+			elems->link_id = pos;
+			break;
 		default:
 			unknown++;
 			if (!show_errors)

src/common/ieee802_11_common.h

@@ -41,6 +41,7 @@ struct ieee802_11_elems {
 	const u8 *ht_operation;
 	const u8 *vendor_ht_cap;
 	const u8 *p2p;
+	const u8 *link_id;
 
 	u8 ssid_len;
 	u8 supp_rates_len;

src/common/ieee802_11_defs.h

@@ -212,6 +212,7 @@
 #define WLAN_EID_20_40_BSS_INTOLERANT 73
 #define WLAN_EID_OVERLAPPING_BSS_SCAN_PARAMS 74
 #define WLAN_EID_MMIE 76
+#define WLAN_EID_LINK_ID 101
 #define WLAN_EID_ADV_PROTO 108
 #define WLAN_EID_VENDOR_SPECIFIC 221
 
@@ -226,6 +227,7 @@
 #define WLAN_ACTION_FT 6
 #define WLAN_ACTION_HT 7
 #define WLAN_ACTION_SA_QUERY 8
+#define WLAN_ACTION_TDLS 12
 #define WLAN_ACTION_WMM 17 /* WMM Specification 1.1 */
 #define WLAN_ACTION_VENDOR_SPECIFIC 127
 
@@ -242,6 +244,19 @@
 
 #define WLAN_SA_QUERY_TR_ID_LEN 2
 
+/* TDLS action codes */
+#define WLAN_TDLS_SETUP_REQUEST 0
+#define WLAN_TDLS_SETUP_RESPONSE 1
+#define WLAN_TDLS_SETUP_CONFIRM 2
+#define WLAN_TDLS_TEARDOWN 3
+#define WLAN_TDLS_PEER_TRAFFIC_INDICATION 4
+#define WLAN_TDLS_CHANNEL_SWITCH_REQUEST 5
+#define WLAN_TDLS_CHANNEL_SWITCH_RESPONSE 6
+#define WLAN_TDLS_PEER_PSM_REQUEST 7
+#define WLAN_TDLS_PEER_PSM_RESPONSE 8
+#define WLAN_TDLS_PEER_TRAFFIC_RESPONSE 9
+#define WLAN_TDLS_DISCOVERY_REQUEST 10
+
 /* Timeout Interval Type */
 #define WLAN_TIMEOUT_REASSOC_DEADLINE 1
 #define WLAN_TIMEOUT_KEY_LIFETIME 2