Shouldn't the patch bypass the rate control algo and specifically
this piece of code in tx.c:
if (!(tx->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL))
CALL_TXH(ieee80211_tx_h_rate_ctrl);
Thanks
Il 20/05/2011 01:13, Matteo Croce ha scritto:
Allow to set the tx rate and retries when injecting:
read the information from the radiotap header and populate the retry chain
Signed-off-by: Matteo Croce<matteo@xxxxxxxxxxx>
--- a/net/mac80211/tx.c 2011-05-20 00:22:56.250640264 +0200
+++ b/net/mac80211/tx.c 2011-05-20 00:24:14.010640270 +0200
@@ -1092,6 +1092,44 @@
tx->flags |= IEEE80211_TX_FRAGMENTED;
break;
+ case IEEE80211_RADIOTAP_RATE: {
+ info->control.rates[0].idx = 0;
+ if (*iterator.this_arg) {
+ int i;
+ for (i = 0; i< sband->n_bitrates; i++)
+ if (sband->bitrates[i].bitrate ==
+ *iterator.this_arg * 5) {
+ 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;
+
+ case IEEE80211_RADIOTAP_MCS: {
+ u8 flags = iterator.this_arg[1];
+ u8 mcs = iterator.this_arg[2];
+ info->control.rates[0].idx = mcs;
+ info->control.rates[0].flags |=
+ IEEE80211_TX_RC_MCS;
+ if (flags& IEEE80211_RADIOTAP_MCS_BW_40)
+ info->control.rates[0].flags |=
+ IEEE80211_TX_RC_40_MHZ_WIDTH;
+ if (flags& IEEE80211_RADIOTAP_MCS_SGI)
+ info->control.rates[0].flags |=
+ IEEE80211_TX_RC_SHORT_GI;
+ break;
+ }
+
/*
* Please update the file
* Documentation/networking/mac80211-injection.txt
--- a/net/mac80211/ieee80211_i.h 2011-05-20 00:22:56.240640264 +0200
+++ b/net/mac80211/ieee80211_i.h 2011-05-20 00:24:14.010640270 +0200
@@ -1217,6 +1217,10 @@
u8 padding_for_rate;
__le16 tx_flags;
u8 data_retries;
+ /*HT info*/
+ u8 ht_known;
+ u8 ht_flag;
+ u8 ht_mcs;
} __packed;
--- a/net/wireless/radiotap.c 2011-05-20 00:22:56.270640264 +0200
+++ b/net/wireless/radiotap.c 2011-05-20 00:24:14.010640270 +0200
@@ -40,6 +40,7 @@
[IEEE80211_RADIOTAP_TX_FLAGS] = { .align = 2, .size = 2, },
[IEEE80211_RADIOTAP_RTS_RETRIES] = { .align = 1, .size = 1, },
[IEEE80211_RADIOTAP_DATA_RETRIES] = { .align = 1, .size = 1, },
+ [IEEE80211_RADIOTAP_MCS] = { .align = 1, .size = 3, },
/*
* add more here as they are defined in radiotap.h
*/
--- a/include/net/mac80211.h 2011-05-20 00:22:56.210640264 +0200
+++ b/include/net/mac80211.h 2011-05-20 00:24:14.020640270 +0200
@@ -2278,7 +2278,7 @@
* The TX headroom reserved by mac80211 for its own tx_status functions.
* This is enough for the radiotap header.
*/
-#define IEEE80211_TX_STATUS_HEADROOM 13
+#define IEEE80211_TX_STATUS_HEADROOM 16
/**
* ieee80211_sta_set_tim - set the TIM bit for a sleeping station
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