On Mon, Jan 18, 2010 at 1:35 AM, Lenin Ravindranath S <sle...@gmail.com> wrote:
> I am running 2.6.27.37-170.2.104.fc10.i686.
>
> Can you point me to the patch that will enable me to set rates?
> Even the b/g rates doesn't seem to work. The packets are sent out at 1Mbps
> always.
>
> On Sun, Jan 17, 2010 at 3:18 AM, Benoit PAPILLAULT
> <benoit.papilla...@free.fr> wrote:
>>
>> Lenin Ravindranath S a écrit :
>> > Hi,
>> >
>> > I am new to ath9k. I have a DWA-642 card and I am trying to set it in
>> > monitor mode to inject and receive packets.
>> >
>> > I did
>> >
>> > iw dev wlan0 interface add fish0 type monitor
>> > ifconfig fish0 up
>> >
>> >
>> > I have two problems
>> > 1. The interface is able to get only packets which has destination
>> > address as a broadcast address (FF:FF:FF:FF:FF:FF) and not every packet
>> > in the air.
>>
>> That's not expected. Maybe you should set the channel as well :
>> iw dev fish0 set channel 1
>>
>> >
>> > 2. Whatever rate I set in radiotap header to inject packet, the packet
>> > goes out at only 1Mbps. I tried to use both packetspammer and "click
>> > router" to try to inject packets.
>>
>> Indeed, that's not implemented. There are patches to do it however.
>>
>> >
>> > Am I missing some flags/settings?
>>
>> Yes. What kernel are you using?
>>
>> >
>> > Thanks
>> > Lenin
>>
>> Regards,
>> Benoit
>>
>
>
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>
>
Here is it
Index: compat-wireless-2009-11-21/net/mac80211/tx.c
===================================================================
--- compat-wireless-2009-11-21.orig/net/mac80211/tx.c 2009-11-21 06:17:32.000000000 +0100
+++ compat-wireless-2009-11-21/net/mac80211/tx.c 2009-11-30 12:14:54.500163716 +0100
@@ -979,6 +979,47 @@
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_RATE_MCS: {
+ u8 flags;
+ if (info->control.rates[0].idx)
+ break;
+ flags = *(iterator.this_arg + 1);
+ info->control.rates[0].idx = *iterator.this_arg;
+
+ info->control.rates[0].flags |=
+ IEEE80211_TX_RC_MCS;
+ if (flags & IEEE80211_RADIOTAP_RATE_MCS_40MHZ)
+ info->control.rates[0].flags |=
+ IEEE80211_TX_RC_40_MHZ_WIDTH;
+ if (flags & IEEE80211_RADIOTAP_RATE_MCS_SHORT_GI)
+ info->control.rates[0].flags |=
+ IEEE80211_TX_RC_SHORT_GI;
+ break;
+ }
+
/*
* Please update the file
* Documentation/networking/mac80211-injection.txt
Index: compat-wireless-2009-11-21/include/net/ieee80211_radiotap.h
===================================================================
--- compat-wireless-2009-11-21.orig/include/net/ieee80211_radiotap.h 2009-11-21 06:17:32.000000000 +0100
+++ compat-wireless-2009-11-21/include/net/ieee80211_radiotap.h 2009-11-30 12:14:54.500163716 +0100
@@ -174,6 +174,11 @@
*
* Number of rts retries a transmitted frame used.
*
+ * IEEE80211_RADIOTAP_RATE_MCS 2 x u8 data, bitmap
+ *
+ * First byte is the MCS index of the rate,
+ * second one has flags about channel width and guard interval
+ *
* IEEE80211_RADIOTAP_DATA_RETRIES u8 data
*
* Number of unicast retries a transmitted frame used.
@@ -198,6 +203,7 @@
IEEE80211_RADIOTAP_TX_FLAGS = 15,
IEEE80211_RADIOTAP_RTS_RETRIES = 16,
IEEE80211_RADIOTAP_DATA_RETRIES = 17,
+ IEEE80211_RADIOTAP_RATE_MCS = 19,
IEEE80211_RADIOTAP_EXT = 31
};
@@ -241,6 +247,10 @@
#define IEEE80211_RADIOTAP_F_TX_CTS 0x0002 /* used cts 'protection' */
#define IEEE80211_RADIOTAP_F_TX_RTS 0x0004 /* used rts/cts handshake */
+/* For IEEE80211_RADIOTAP_RATE_MCS */
+#define IEEE80211_RADIOTAP_RATE_MCS_40MHZ 0x01 /* 40 MHz channel width */
+#define IEEE80211_RADIOTAP_RATE_MCS_SHORT_GI 0x02 /* short guard interval */
+
/* Ugly macro to convert literal channel numbers into their mhz equivalents
* There are certianly some conditions that will break this (like feeding it '30')
* but they shouldn't arise since nothing talks on channel 30. */
Index: compat-wireless-2009-11-21/net/wireless/radiotap.c
===================================================================
--- compat-wireless-2009-11-21.orig/net/wireless/radiotap.c 2009-11-21 06:17:32.000000000 +0100
+++ compat-wireless-2009-11-21/net/wireless/radiotap.c 2009-11-30 12:14:54.500163716 +0100
@@ -164,6 +164,7 @@
[IEEE80211_RADIOTAP_TX_FLAGS] = 0x22,
[IEEE80211_RADIOTAP_RTS_RETRIES] = 0x11,
[IEEE80211_RADIOTAP_DATA_RETRIES] = 0x11,
+ [IEEE80211_RADIOTAP_RATE_MCS] = 0x12,
/*
* add more here as they are defined in
* include/net/ieee80211_radiotap.h
Index: compat-wireless-2009-11-21/net/mac80211/rx.c
===================================================================
--- compat-wireless-2009-11-21.orig/net/mac80211/rx.c 2009-11-21 06:17:36.000000000 +0100
+++ compat-wireless-2009-11-21/net/mac80211/rx.c 2009-11-30 12:14:54.500163716 +0100
@@ -86,7 +86,8 @@
len += 1;
if (local->hw.flags & IEEE80211_HW_NOISE_DBM)
len += 1;
-
+ if (status->flag & RX_FLAG_HT)
+ len += 2;
if (len & 1) /* padding for RX_FLAGS if necessary */
len++;
@@ -142,19 +143,11 @@
pos++;
/* IEEE80211_RADIOTAP_RATE */
- if (status->flag & RX_FLAG_HT) {
- /*
- * TODO: add following information into radiotap header once
- * suitable fields are defined for it:
- * - MCS index (status->rate_idx)
- * - HT40 (status->flag & RX_FLAG_40MHZ)
- * - short-GI (status->flag & RX_FLAG_SHORT_GI)
- */
+ rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
+ if (status->flag & RX_FLAG_HT)
*pos = 0;
- } else {
- rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
+ else
*pos = rate->bitrate / 5;
- }
pos++;
/* IEEE80211_RADIOTAP_CHANNEL */
@@ -206,6 +199,20 @@
rx_flags |= IEEE80211_RADIOTAP_F_RX_BADPLCP;
put_unaligned_le16(rx_flags, pos);
pos += 2;
+
+ /* IEEE80211_RADIOTAP_RATE_MCS */
+ if (status->flag & RX_FLAG_HT) {
+ rthdr->it_present |=
+ cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE_MCS);
+ *pos = status->rate_idx;
+ pos++;
+ *pos = 0;
+ if (status->flag & RX_FLAG_40MHZ)
+ *pos |= IEEE80211_RADIOTAP_RATE_MCS_40MHZ;
+ if (status->flag & RX_FLAG_SHORT_GI)
+ *pos |= IEEE80211_RADIOTAP_RATE_MCS_SHORT_GI;
+ pos++;
+ }
}
/*
Index: compat-wireless-2009-11-21/net/mac80211/ieee80211_i.h
===================================================================
--- compat-wireless-2009-11-21.orig/net/mac80211/ieee80211_i.h 2009-11-21 06:17:32.000000000 +0100
+++ compat-wireless-2009-11-21/net/mac80211/ieee80211_i.h 2009-11-30 12:14:54.500163716 +0100
@@ -965,6 +965,7 @@
u8 padding_for_rate;
__le16 tx_flags;
u8 data_retries;
+ u8 mcs; /*HT rates*/
} __attribute__ ((packed));
Index: compat-wireless-2009-11-21/net/mac80211/status.c
===================================================================
--- compat-wireless-2009-11-21.orig/net/mac80211/status.c 2009-11-21 06:17:32.000000000 +0100
+++ compat-wireless-2009-11-21/net/mac80211/status.c 2009-11-30 12:16:45.620220980 +0100
@@ -293,6 +293,16 @@
!(info->status.rates[0].flags & IEEE80211_TX_RC_MCS))
rthdr->rate = sband->bitrates[
info->status.rates[0].idx].bitrate / 5;
+ /* HT rates */
+ if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
+ rthdr->hdr.it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE_MCS);
+ rthdr->rate = 0;
+ rthdr->mcs = info->status.rates[0].idx;
+ if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
+ rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_RATE_MCS_40MHZ);
+ if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
+ rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_RATE_MCS_SHORT_GI);
+ }
/* for now report the total retry_count */
rthdr->data_retries = retry_count;
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