Allow injected unicast frames to be sent without having to wait
for an ACK.
Signed-off-by: Helmut Schaa <helmut.schaa@xxxxxxxxxxxxxx>
---
include/net/ieee80211_radiotap.h | 1 +
net/mac80211/tx.c | 15 +++++++++++++--
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/include/net/ieee80211_radiotap.h b/include/net/ieee80211_radiotap.h
index b0be5fb..7e2c4d4 100644
--- a/include/net/ieee80211_radiotap.h
+++ b/include/net/ieee80211_radiotap.h
@@ -251,6 +251,7 @@ enum ieee80211_radiotap_type {
* retries */
#define IEEE80211_RADIOTAP_F_TX_CTS 0x0002 /* used cts 'protection' */
#define IEEE80211_RADIOTAP_F_TX_RTS 0x0004 /* used rts/cts handshake */
+#define IEEE80211_RADIOTAP_F_TX_NOACK 0x0008 /* don't expect an ack */
/* For IEEE80211_RADIOTAP_MCS */
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 0107263..c1bad18 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1047,6 +1047,7 @@ static bool __ieee80211_parse_tx_radiotap(struct ieee80211_tx_data *tx,
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
NULL);
+ u16 txflags;
info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
tx->flags &= ~IEEE80211_TX_FRAGMENTED;
@@ -1095,6 +1096,13 @@ static bool __ieee80211_parse_tx_radiotap(struct ieee80211_tx_data *tx,
tx->flags |= IEEE80211_TX_FRAGMENTED;
break;
+ case IEEE80211_RADIOTAP_TX_FLAGS:
+ txflags = le16_to_cpu(get_unaligned((__le16*)
+ iterator.this_arg));
+ if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
+ info->flags |= IEEE80211_TX_CTL_NO_ACK;
+ break;
+
/*
* Please update the file
* Documentation/networking/mac80211-injection.txt
@@ -1257,8 +1265,11 @@ ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
tx->flags |= IEEE80211_TX_UNICAST;
if (unlikely(local->wifi_wme_noack_test))
info->flags |= IEEE80211_TX_CTL_NO_ACK;
- else
- info->flags &= ~IEEE80211_TX_CTL_NO_ACK;
+ /*
+ * Flags are initialized to 0. Hence, no need to
+ * explicitly unset IEEE80211_TX_CTL_NO_ACK since
+ * it might already be set for injected frames.
+ */
}
if (tx->flags & IEEE80211_TX_FRAGMENTED) {
--
1.7.3.4
--
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