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65 lines
2.0 KiB
65 lines
2.0 KiB
From: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
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Date: Tue, 23 Feb 2016 15:43:35 +0100
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Subject: [PATCH] mac80211: parse VHT info in injected frames
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Add VHT radiotap parsing support to ieee80211_parse_tx_radiotap().
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That capability has been tested using a d-link dir-860l rev b1 running
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OpenWrt trunk and mt76 driver
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Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
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---
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--- a/net/mac80211/tx.c
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+++ b/net/mac80211/tx.c
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@@ -1690,6 +1690,8 @@ static bool ieee80211_parse_tx_radiotap(
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u8 rate_retries = 0;
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u16 rate_flags = 0;
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u8 mcs_known, mcs_flags, mcs_bw;
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+ u16 vht_known;
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+ u8 vht_mcs = 0, vht_nss = 0;
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int i;
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info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
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@@ -1771,6 +1773,32 @@ static bool ieee80211_parse_tx_radiotap(
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rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
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break;
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+ case IEEE80211_RADIOTAP_VHT:
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+ vht_known = get_unaligned_le16(iterator.this_arg);
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+ rate_found = true;
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+
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+ rate_flags = IEEE80211_TX_RC_VHT_MCS;
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+ if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
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+ (iterator.this_arg[2] &
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+ IEEE80211_RADIOTAP_VHT_FLAG_SGI))
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+ rate_flags |= IEEE80211_TX_RC_SHORT_GI;
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+ if (vht_known &
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+ IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
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+ if (iterator.this_arg[3] == 1)
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+ rate_flags |=
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+ IEEE80211_TX_RC_40_MHZ_WIDTH;
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+ else if (iterator.this_arg[3] == 4)
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+ rate_flags |=
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+ IEEE80211_TX_RC_80_MHZ_WIDTH;
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+ else if (iterator.this_arg[3] == 11)
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+ rate_flags |=
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+ IEEE80211_TX_RC_160_MHZ_WIDTH;
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+ }
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+
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+ vht_mcs = iterator.this_arg[4] >> 4;
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+ vht_nss = iterator.this_arg[4] & 0xF;
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+ break;
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+
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/*
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* Please update the file
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* Documentation/networking/mac80211-injection.txt
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@@ -1796,6 +1824,9 @@ static bool ieee80211_parse_tx_radiotap(
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if (rate_flags & IEEE80211_TX_RC_MCS) {
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info->control.rates[0].idx = rate;
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+ } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
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+ ieee80211_rate_set_vht(info->control.rates, vht_mcs,
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+ vht_nss);
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} else {
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for (i = 0; i < sband->n_bitrates; i++) {
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if (rate * 5 != sband->bitrates[i].bitrate)
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