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wireless: radiotap updates

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Radiotap was updated to include a "bad PLCP" flag and standardise
the "bad FCS" flag in the "flags" rather than "RX flags" field,
this patch updates Linux to that standard.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2009-03-13 12:52:10 +01:00 committed by John W. Linville
parent 25420604c8
commit aae89831df
4 changed files with 9 additions and 24 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/net/wireless/libertas/radiotap.h
View file

@ -33,22 +33,12 @@ struct rx_radiotap_hdr {
struct ieee80211_radiotap_header hdr;
u8 flags;
u8 rate;
u16 chan_freq;
u16 chan_flags;
u8 antenna;
u8 antsignal;
u16 rx_flags;
#if 0
u8 pad[IEEE80211_RADIOTAP_HDRLEN - 18];
#endif
} __attribute__ ((packed));
#define RX_RADIOTAP_PRESENT ( \
(1 << IEEE80211_RADIOTAP_FLAGS) | \
(1 << IEEE80211_RADIOTAP_RATE) | \
(1 << IEEE80211_RADIOTAP_CHANNEL) | \
(1 << IEEE80211_RADIOTAP_ANTENNA) | \
(1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL) |\
(1 << IEEE80211_RADIOTAP_RX_FLAGS) | \
0)

12
drivers/net/wireless/libertas/rx.c
View file

@ -351,19 +351,11 @@ static int process_rxed_802_11_packet(struct lbs_private *priv,
radiotap_hdr.hdr.it_pad = 0;
radiotap_hdr.hdr.it_len = cpu_to_le16 (sizeof(struct rx_radiotap_hdr));
radiotap_hdr.hdr.it_present = cpu_to_le32 (RX_RADIOTAP_PRESENT);
/* unknown values */
radiotap_hdr.flags = 0;
radiotap_hdr.chan_freq = 0;
radiotap_hdr.chan_flags = 0;
radiotap_hdr.antenna = 0;
/* known values */
if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
radiotap_hdr.flags |= IEEE80211_RADIOTAP_F_BADFCS;
radiotap_hdr.rate = convert_mv_rate_to_radiotap(prxpd->rx_rate);
/* XXX must check no carryout */
radiotap_hdr.antsignal = prxpd->snr + prxpd->nf;
radiotap_hdr.rx_flags = 0;
if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
radiotap_hdr.rx_flags |= IEEE80211_RADIOTAP_F_RX_BADFCS;
//memset(radiotap_hdr.pad, 0x11, IEEE80211_RADIOTAP_HDRLEN - 18);
/* chop the rxpd */
skb_pull(skb, sizeof(struct rxpd));

4
include/net/ieee80211_radiotap.h
View file

@ -230,8 +230,10 @@ enum ieee80211_radiotap_type {
* 802.11 header and payload
* (to 32-bit boundary)
*/
#define IEEE80211_RADIOTAP_F_BADFCS 0x40 /* bad FCS */
/* For IEEE80211_RADIOTAP_RX_FLAGS */
#define IEEE80211_RADIOTAP_F_RX_BADFCS 0x0001 /* frame failed crc check */
#define IEEE80211_RADIOTAP_F_RX_BADPLCP 0x0002 /* frame has bad PLCP */
/* For IEEE80211_RADIOTAP_TX_FLAGS */
#define IEEE80211_RADIOTAP_F_TX_FAIL 0x0001 /* failed due to excessive

7
net/mac80211/rx.c
View file

@ -142,6 +142,8 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
/* IEEE80211_RADIOTAP_FLAGS */
if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
*pos |= IEEE80211_RADIOTAP_F_FCS;
if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
*pos |= IEEE80211_RADIOTAP_F_BADFCS;
if (status->flag & RX_FLAG_SHORTPRE)
*pos |= IEEE80211_RADIOTAP_F_SHORTPRE;
pos++;
@ -204,9 +206,8 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
/* ensure 2 byte alignment for the 2 byte field as required */
if ((pos - (unsigned char *)rthdr) & 1)
pos++;
/* FIXME: when radiotap gets a 'bad PLCP' flag use it here */
if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
*(__le16 *)pos |= cpu_to_le16(IEEE80211_RADIOTAP_F_RX_BADFCS);
if (status->flag & RX_FLAG_FAILED_PLCP_CRC)
*(__le16 *)pos |= cpu_to_le16(IEEE80211_RADIOTAP_F_RX_BADPLCP);
pos += 2;
}