Wireshark already defines radiotap channel flags for 5 and 10 MHz, so
just use them in Linux radiotap too. Furthermore, add rx status flags to
allow drivers to report when they received data on 5 or 10 MHz channels.
Signed-off-by: Simon Wunderlich <siwu@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@xxxxxxxxxxxxxxxxxxx>
---
include/net/ieee80211_radiotap.h | 4 ++++
include/net/mac80211.h | 4 ++++
net/mac80211/rx.c | 21 ++++++++++++---------
3 files changed, 20 insertions(+), 9 deletions(-)
diff --git a/include/net/ieee80211_radiotap.h b/include/net/ieee80211_radiotap.h
index c6d07cb..8b5b714 100644
--- a/include/net/ieee80211_radiotap.h
+++ b/include/net/ieee80211_radiotap.h
@@ -230,6 +230,10 @@ enum ieee80211_radiotap_type {
#define IEEE80211_CHAN_PASSIVE 0x0200 /* Only passive scan allowed */
#define IEEE80211_CHAN_DYN 0x0400 /* Dynamic CCK-OFDM channel */
#define IEEE80211_CHAN_GFSK 0x0800 /* GFSK channel (FHSS PHY) */
+#define IEEE80211_CHAN_GSM 0x1000 /* GSM (900 MHz) */
+#define IEEE80211_CHAN_STURBO 0x2000 /* Static Turbo */
+#define IEEE80211_CHAN_HALF 0x4000 /* Half channel (10 MHz wide) */
+#define IEEE80211_CHAN_QUARTER 0x8000 /* Quarter channel (5 MHz wide) */
/* For IEEE80211_RADIOTAP_FLAGS */
#define IEEE80211_RADIOTAP_F_CFP 0x01 /* sent/received
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 9445f38..ed3dd96 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -809,6 +809,8 @@ ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info)
* @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC
* is stored in the @ampdu_delimiter_crc field)
* @RX_FLAG_STBC_MASK: STBC 2 bit bitmask. 1 - Nss=1, 2 - Nss=2, 3 - Nss=3
+ * @RX_FLAG_10MHZ: 10 MHz (half channel) was used
+ * @RX_FLAG_5MHZ: 5 MHz (quarter channel) was used
*/
enum mac80211_rx_flags {
RX_FLAG_MMIC_ERROR = BIT(0),
@@ -837,6 +839,8 @@ enum mac80211_rx_flags {
RX_FLAG_80P80MHZ = BIT(24),
RX_FLAG_160MHZ = BIT(25),
RX_FLAG_STBC_MASK = BIT(26) | BIT(27),
+ RX_FLAG_10MHZ = BIT(28),
+ RX_FLAG_5MHZ = BIT(29),
};
#define RX_FLAG_STBC_SHIFT 26
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 90ab888..e62aca1 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -146,6 +146,7 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
struct ieee80211_radiotap_header *rthdr;
unsigned char *pos;
u16 rx_flags = 0;
+ u16 channel_flags = 0;
int mpdulen;
mpdulen = skb->len;
@@ -220,20 +221,22 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
/* IEEE80211_RADIOTAP_CHANNEL */
put_unaligned_le16(status->freq, pos);
pos += 2;
+ if (status->flag & RX_FLAG_10MHZ)
+ channel_flags |= IEEE80211_CHAN_HALF;
+ else if (status->flag & RX_FLAG_5MHZ)
+ channel_flags |= IEEE80211_CHAN_QUARTER;
+
if (status->band == IEEE80211_BAND_5GHZ)
- put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ,
- pos);
+ channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ;
else if (status->flag & (RX_FLAG_HT | RX_FLAG_VHT))
- put_unaligned_le16(IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ,
- pos);
+ channel_flags |= IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ;
else if (rate && rate->flags & IEEE80211_RATE_ERP_G)
- put_unaligned_le16(IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ,
- pos);
+ channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ;
else if (rate)
- put_unaligned_le16(IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ,
- pos);
+ channel_flags |= IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ;
else
- put_unaligned_le16(IEEE80211_CHAN_2GHZ, pos);
+ channel_flags |= IEEE80211_CHAN_2GHZ;
+ put_unaligned_le16(channel_flags, pos);
pos += 2;
/* IEEE80211_RADIOTAP_DBM_ANTSIGNAL */
--
1.7.10.4
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