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authorSven Eckelmann <sven@narfation.org>2016-01-26 19:11:13 +0300
committerJohannes Berg <johannes.berg@intel.com>2016-02-24 11:04:30 +0300
commitdfdfc2beb0dd7e3a067d2eeacb4623cb48e77658 (patch)
tree68171d12c6bd64d08b39beda5e27aac1c44eb696 /Documentation/networking
parent3f73fe9fd8703123faf663908923ca9e62cb984e (diff)
downloadlinux-dfdfc2beb0dd7e3a067d2eeacb4623cb48e77658.tar.xz
mac80211: Parse legacy and HT rate in injected frames
Drivers/devices without their own rate control algorithm can get the information what rates they should use from either the radiotap header of injected frames or from the rate control algorithm. But the parsing of the legacy rate information from the radiotap header was removed in commit e6a9854b05c1 ("mac80211/drivers: rewrite the rate control API"). The removal of this feature heavily reduced the usefulness of frame injection when wanting to simulate specific transmission behavior. Having rate parsing together with MCS rates and retry support allows a fine grained selection of the tx behavior of injected frames for these kind of tests. Signed-off-by: Sven Eckelmann <sven@narfation.org> Cc: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'Documentation/networking')
-rw-r--r--Documentation/networking/mac80211-injection.txt17
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/networking/mac80211-injection.txt b/Documentation/networking/mac80211-injection.txt
index 3a930072b161..ec8f934c2eb2 100644
--- a/Documentation/networking/mac80211-injection.txt
+++ b/Documentation/networking/mac80211-injection.txt
@@ -28,6 +28,23 @@ radiotap headers and used to control injection:
IEEE80211_RADIOTAP_F_TX_NOACK: frame should be sent without waiting for
an ACK even if it is a unicast frame
+ * IEEE80211_RADIOTAP_RATE
+
+ legacy rate for the transmission (only for devices without own rate control)
+
+ * IEEE80211_RADIOTAP_MCS
+
+ HT rate for the transmission (only for devices without own rate control).
+ Also some flags are parsed
+
+ IEEE80211_TX_RC_SHORT_GI: use short guard interval
+ IEEE80211_TX_RC_40_MHZ_WIDTH: send in HT40 mode
+
+ * IEEE80211_RADIOTAP_DATA_RETRIES
+
+ number of retries when either IEEE80211_RADIOTAP_RATE or
+ IEEE80211_RADIOTAP_MCS was used
+
The injection code can also skip all other currently defined radiotap fields
facilitating replay of captured radiotap headers directly.