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HE: Fix calculation of the PPE Threshold field length

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The previously used calculation was not correct for the cases where the
extra padding field was needed. Fix this by properly calculating the
number of full octets in the field.

Fixes: 0497e41481 ("HE: Fix HE Capabilities element size")
Signed-off-by: Shiva Sankar Gajula <quic_sgajula@quicinc.com>
This commit is contained in:
Shiva Sankar Gajula 2022-02-04 23:13:30 +05:30 committed by Jouni Malinen
parent a201ab385e
commit 53be64f7d9
1 changed files with 5 additions and 3 deletions
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8
src/ap/ieee802_11_he.c
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@ -29,17 +29,19 @@ static u8 ieee80211_he_ppet_size(u8 ppe_thres_hdr, const u8 *phy_cap_info)
ru = (ppe_thres_hdr >> HE_PPE_THRES_RU_INDEX_BITMASK_SHIFT) &
HE_PPE_THRES_RU_INDEX_BITMASK_MASK;
/* Count the number of 1 bits in RU Index Bitmask */
while (ru) {
if (ru & 0x1)
sz++;
ru >>= 1;
}
/* fixed header of 3 (NSTS) + 4 (RU Index Bitmask) = 7 bits */
/* 6 * (NSTS + 1) bits for bit 1 in RU Index Bitmask */
sz *= 1 + (ppe_thres_hdr & HE_PPE_THRES_NSS_MASK);
sz = (sz * 6) + 7;
if (sz % 8)
sz += 8;
sz /= 8;
/* PPE Pad to count the number of needed full octets */
sz = (sz + 7) / 8;
return sz;
}