This patch implements the IEEE80211_RADIOTAP_RATE
option when parsing radiotap headers to allow rate
selection on a per-packet basis.
Signed-off-by: Rafael Laufer <rlaufer@xxxxxxxxxxx>
---
Implementation of the IEEE80211_RADIOTAP_RATE
option when parsing radiotap headers to allow
rate selection on a per-packet basis.
net/mac80211/tx.c | 18 +++++++++++++++++-
1 files changed, 17 insertions(+), 1 deletions(-)
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 10a1099..41d636b 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -549,7 +549,10 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
* If we're associated with the sta at this point we know we can at
* least send the frame at the lowest bit rate.
*/
- rate_control_get_rate(tx->sdata, tx->sta, &txrc);
+
+ /* in monitor mode, we already have the rate from the radiotap header */
+ if (likely(!(info->flags & IEEE80211_TX_CTL_INJECTED)))
+ rate_control_get_rate(tx->sdata, tx->sta, &txrc);
if (unlikely(info->control.rates[0].idx < 0))
return TX_DROP;
@@ -972,6 +975,19 @@ static bool __ieee80211_parse_tx_radiotap(struct ieee80211_tx_data *tx,
tx->flags |= IEEE80211_TX_FRAGMENTED;
break;
+ /* Get the rate parameter from the radiotap header,
+ * allowing rate selection on a per-packet basis
+ */
+ case IEEE80211_RADIOTAP_RATE:
+ bitrate = (*iterator.this_arg) * 5;
+ for (i = 0; i < sband->n_bitrates; i++) {
+ if (sband->bitrates[i].bitrate == bitrate)
+ break;
+ }
+ if (i != sband->n_bitrates)
+ info->control.rates[0].idx = i;
+ break;
+
/*
* Please update the file
* Documentation/networking/mac80211-injection.txt
--
1.6.0.4
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