1 From: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
2 Date: Tue, 23 Feb 2016 15:43:35 +0100
3 Subject: [PATCH] mac80211: parse VHT info in injected frames
5 Add VHT radiotap parsing support to ieee80211_parse_tx_radiotap().
6 That capability has been tested using a d-link dir-860l rev b1 running
7 OpenWrt trunk and mt76 driver
9 Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
12 --- a/net/mac80211/tx.c
13 +++ b/net/mac80211/tx.c
14 @@ -1690,6 +1690,8 @@ static bool ieee80211_parse_tx_radiotap(
17 u8 mcs_known, mcs_flags, mcs_bw;
19 + u8 vht_mcs = 0, vht_nss = 0;
22 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
23 @@ -1771,6 +1773,32 @@ static bool ieee80211_parse_tx_radiotap(
24 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
27 + case IEEE80211_RADIOTAP_VHT:
28 + vht_known = get_unaligned_le16(iterator.this_arg);
31 + rate_flags = IEEE80211_TX_RC_VHT_MCS;
32 + if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
33 + (iterator.this_arg[2] &
34 + IEEE80211_RADIOTAP_VHT_FLAG_SGI))
35 + rate_flags |= IEEE80211_TX_RC_SHORT_GI;
37 + IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
38 + if (iterator.this_arg[3] == 1)
40 + IEEE80211_TX_RC_40_MHZ_WIDTH;
41 + else if (iterator.this_arg[3] == 4)
43 + IEEE80211_TX_RC_80_MHZ_WIDTH;
44 + else if (iterator.this_arg[3] == 11)
46 + IEEE80211_TX_RC_160_MHZ_WIDTH;
49 + vht_mcs = iterator.this_arg[4] >> 4;
50 + vht_nss = iterator.this_arg[4] & 0xF;
54 * Please update the file
55 * Documentation/networking/mac80211-injection.txt
56 @@ -1796,6 +1824,9 @@ static bool ieee80211_parse_tx_radiotap(
58 if (rate_flags & IEEE80211_TX_RC_MCS) {
59 info->control.rates[0].idx = rate;
60 + } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
61 + ieee80211_rate_set_vht(info->control.rates, vht_mcs,
64 for (i = 0; i < sband->n_bitrates; i++) {
65 if (rate * 5 != sband->bitrates[i].bitrate)