wlantest: Recognize the FTM bit in the CCMP Key ID octet

This previously reserved bit is now used in FTM to help select the
appropriate replay counter. Silence the warning about use of a reserved
bit for this. wlantest does not yet support the actual replay counter
processing for FTM.

Signed-off-by: Jouni Malinen <j@w1.fi>

wlantest/rx_mgmt.c

@@ -2201,8 +2201,11 @@ static u8 * mgmt_ccmp_decrypt(struct wlantest *wt, const u8 *data, size_t len,
 	int keyid;
 	u8 *decrypted, *frame = NULL;
 	u8 pn[6], *rsc;
+	u16 fc;
+	u8 mask;
 
 	hdr = (const struct ieee80211_hdr *) data;
+	fc = le_to_host16(hdr->frame_control);
 
 	if (len < 24 + 4)
 		return NULL;
@@ -2214,7 +2217,11 @@ static u8 * mgmt_ccmp_decrypt(struct wlantest *wt, const u8 *data, size_t len,
 		return NULL;
 	}
 
-	if (data[24 + 2] != 0 || (data[24 + 3] & 0x1f) != 0) {
+	mask = 0x1f;
+	if (WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_ACTION ||
+	    WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_ACTION_NO_ACK)
+		mask &= ~0x10; /* FTM */
+	if (data[24 + 2] != 0 || (data[24 + 3] & mask) != 0) {
 		add_note(wt, MSG_INFO, "CCMP mgmt frame from " MACSTR " used "
 			 "non-zero reserved bit", MAC2STR(hdr->addr2));
 	}