[PATCH] ipw2200: Add IEEE80211_RADIOTAP_TSFT for promiscuous mode

The ipw2200 BSS firmware passes on the TSF information within ipw_rx_frame,
but monitor firmware doesn't. I add back the IEEE80211_RADIOTAP_TSFT flags
so that we can get the MAC timestamp if we use the rtap interface. We will
see the MAC timestamp equals to zero if we capture the packets with a
monitor mode interface. But this is the expected behaviour.

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 13 insertions, 4 deletions

diff --git a/drivers/net/wireless/ipw2200.c b/drivers/net/wireless/ipw2200.c
index b2e144b7f4a0..26998b5157ea 100644
--- a/drivers/net/wireless/ipw2200.c
+++ b/drivers/net/wireless/ipw2200.c
@@ -7656,7 +7656,8 @@ static void ipw_handle_data_packet_monitor(struct ipw_priv *priv,
 
         /* Big bitfield of all the fields we provide in radiotap */
         ipw_rt->rt_hdr.it_present =
-            ((1 << IEEE80211_RADIOTAP_FLAGS) |
+            ((1 << IEEE80211_RADIOTAP_TSFT) |
+             (1 << IEEE80211_RADIOTAP_FLAGS) |
              (1 << IEEE80211_RADIOTAP_RATE) |
              (1 << IEEE80211_RADIOTAP_CHANNEL) |
              (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
@@ -7665,10 +7666,14 @@ static void ipw_handle_data_packet_monitor(struct ipw_priv *priv,
 
         /* Zero the flags, we'll add to them as we go */
         ipw_rt->rt_flags = 0;
-        ipw_rt->rt_tsf = 0ULL;
+        ipw_rt->rt_tsf = (u64)(frame->parent_tsf[3] << 24 |
+                               frame->parent_tsf[2] << 16 |
+                               frame->parent_tsf[1] << 8  |
+                               frame->parent_tsf[0]);
 
         /* Convert signal to DBM */
         ipw_rt->rt_dbmsignal = antsignal;
+        ipw_rt->rt_dbmnoise = frame->noise;
 
         /* Convert the channel data and set the flags */
         ipw_rt->rt_channel = cpu_to_le16(ieee80211chan2mhz(received_channel));
@@ -7868,7 +7873,8 @@ static void ipw_handle_promiscuous_rx(struct ipw_priv *priv,
 
         /* Big bitfield of all the fields we provide in radiotap */
         ipw_rt->rt_hdr.it_present =
-            ((1 << IEEE80211_RADIOTAP_FLAGS) |
+            ((1 << IEEE80211_RADIOTAP_TSFT) |
+             (1 << IEEE80211_RADIOTAP_FLAGS) |
              (1 << IEEE80211_RADIOTAP_RATE) |
              (1 << IEEE80211_RADIOTAP_CHANNEL) |
              (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
@@ -7877,7 +7883,10 @@ static void ipw_handle_promiscuous_rx(struct ipw_priv *priv,
 
         /* Zero the flags, we'll add to them as we go */
         ipw_rt->rt_flags = 0;
-        ipw_rt->rt_tsf = 0ULL;
+        ipw_rt->rt_tsf = (u64)(frame->parent_tsf[3] << 24 |
+                               frame->parent_tsf[2] << 16 |
+                               frame->parent_tsf[1] << 8  |
+                               frame->parent_tsf[0]);
 
         /* Convert to DBM */
         ipw_rt->rt_dbmsignal = signal;