I and my Matteo Croce made a patch which adds the capability
to set the bit-rate when injecting in monitor mode.
The code parse the bit-rate field from the radiotap header and passes the info
to the struct ieee80211_tx_info
--- a/net/mac80211/tx.c 2009-11-09 16:41:15.000000000 +0100
+++ b/net/mac80211/tx.c 2009-11-09 16:50:12.000000000 +0100
@@ -505,6 +505,9 @@
struct ieee80211_tx_rate_control txrc;
u32 sta_flags;
+ if (info->control.vif->type == NL80211_IFTYPE_MONITOR)
+ return TX_CONTINUE;
+
memset(&txrc, 0, sizeof(txrc));
sband = tx->local->hw.wiphy->bands[tx->channel->band];
@@ -932,7 +935,9 @@
(struct ieee80211_radiotap_header *) skb->data;
struct ieee80211_supported_band *sband;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len);
+ int i, ret = ieee80211_radiotap_iterator_init(&iterator,
+ rthdr, skb->len);
+ struct ieee80211_rate *rates;
sband = tx->local->hw.wiphy->bands[tx->channel->band];
@@ -979,6 +984,25 @@
tx->flags |= IEEE80211_TX_FRAGMENTED;
break;
+ case IEEE80211_RADIOTAP_RATE:
+ rates = sband->bitrates;
+ for (i = 0; i < sband->n_bitrates; i++) {
+ if (rates[i].bitrate/5 == *iterator.this_arg) {
+ info->control.rates[0].idx = i;
+ break;
+ }
+ }
+ info->control.rates[0].flags = 0;
+ info->control.rates[1].idx = -1;
+ info->control.rates[2].idx = -1;
+ info->control.rates[3].idx = -1;
+ info->control.rates[4].idx = -1;
+ break;
+
+ case IEEE80211_RADIOTAP_DATA_RETRIES:
+ info->control.rates[0].count = *iterator.this_arg;
+ break;
+
/*
* Please update the file
* Documentation/networking/mac80211-injection.txt
@@ -1518,7 +1542,6 @@
struct net_device *dev)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
- struct ieee80211_channel *chan = local->hw.conf.channel;
struct ieee80211_radiotap_header *prthdr =
(struct ieee80211_radiotap_header *)skb->data;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
@@ -1540,9 +1563,6 @@
* radar detection by itself. We can do that later by adding a
* monitor flag interfaces used for AP support.
*/
- if ((chan->flags & (IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_RADAR |
- IEEE80211_CHAN_PASSIVE_SCAN)))
- goto fail;
/* check for not even having the fixed radiotap header part */
if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
--
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