print PHY membership selector only for membership rates

802.11 states
	... each BSS membership selector contained in the
	BSSMembershipSelectorSet parameter is encoded as an octet with
	the MSB (bit 7) set to 1, and bits 6 through 0 are set to the
	encoded value for the selector as found in Table 7-26a (e.g.: an
	HT PHY BSS membership selector ...)"

diff --git a/scan.c b/scan.c
index bf844fc009e6a5dd4d626c21ae9b270792bdd5a1..86551b38db13215f0141b8923d6892355f801ed2 100644 (file)
--- a/scan.c
+++ b/scan.c
@@ -169,7 +169,7 @@ static void print_supprates(const uint8_t type, uint8_t len, const uint8_t *data
        for (i = 0; i < len; i++) {
                int r = data[i] & 0x7f;
 
-               if (r == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
+               if (r == BSS_MEMBERSHIP_SELECTOR_HT_PHY && data[i] & 0x80)
                        printf("HT");
                else
                        printf("%d.%d", r/2, 5*(r&1));