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mac80211: support A-MPDU status reporting

Browse source 
Support getting A-MPDU status information from the
drivers and reporting it to userspace via radiotap
in the standard fields.

Signed-off-by: Johannes Berg <[email protected]>
This commit is contained in:
Johannes Berg 2012-07-05 11:34:31 +02:00
commit 4c29867790
2 changed files with 80 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

42
net/mac80211/rx.c
View file

@ -60,7 +60,9 @@ static inline int should_drop_frame(struct sk_buff *skb,
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC))
if (status->flag & (RX_FLAG_FAILED_FCS_CRC |
RX_FLAG_FAILED_PLCP_CRC |
RX_FLAG_AMPDU_IS_ZEROLEN))
return 1;
if (unlikely(skb->len < 16 + present_fcs_len))
return 1;
@ -91,6 +93,13 @@ ieee80211_rx_radiotap_len(struct ieee80211_local *local,
if (status->flag & RX_FLAG_HT) /* HT info */
len += 3;
if (status->flag & RX_FLAG_AMPDU_DETAILS) {
/* padding */
while (len & 3)
len++;
len += 8;
}
return len;
}
@ -215,6 +224,37 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
pos++;
*pos++ = status->rate_idx;
}
if (status->flag & RX_FLAG_AMPDU_DETAILS) {
u16 flags = 0;
/* ensure 4 byte alignment */
while ((pos - (u8 *)rthdr) & 3)
pos++;
rthdr->it_present |=
cpu_to_le32(1 << IEEE80211_RADIOTAP_AMPDU_STATUS);
put_unaligned_le32(status->ampdu_reference, pos);
pos += 4;
if (status->flag & RX_FLAG_AMPDU_REPORT_ZEROLEN)
flags |= IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN;
if (status->flag & RX_FLAG_AMPDU_IS_ZEROLEN)
flags |= IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN;
if (status->flag & RX_FLAG_AMPDU_LAST_KNOWN)
flags |= IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN;
if (status->flag & RX_FLAG_AMPDU_IS_LAST)
flags |= IEEE80211_RADIOTAP_AMPDU_IS_LAST;
if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_ERROR)
flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR;
if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN)
flags |= IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN;
put_unaligned_le16(flags, pos);
pos += 2;
if (status->flag & RX_FLAG_AMPDU_DELIM_CRC_KNOWN)
*pos++ = status->ampdu_delimiter_crc;
else
*pos++ = 0;
*pos++ = 0;
}
}
/*