diff options
| author | Shaul Triebitz <shaul.triebitz@intel.com> | 2018-09-05 08:06:06 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2018-09-05 11:08:25 +0300 |
| commit | c3d1f8752802b2e1fb12c73bee50035bc125bc54 (patch) | |
| tree | 8b7874b6f209d0d3f447fbecb1133c989dbe2cf8 /net | |
| parent | 62872a9b9a106f00360193f428451c321ec2e823 (diff) | |
| download | linux-c3d1f8752802b2e1fb12c73bee50035bc125bc54.tar.xz | |
mac80211: support reporting 0-length PSDU in radiotap
For certain sounding frames, it may be useful to report them
to userspace even though they don't have a PSDU in order to
determine the PHY parameters (e.g. VHT rate/stream config.)
Add support for this to mac80211.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/rx.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 4376a4ce8c25..c6bfd4019d44 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -115,7 +115,8 @@ static inline bool should_drop_frame(struct sk_buff *skb, int present_fcs_len, if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC | - RX_FLAG_ONLY_MONITOR)) + RX_FLAG_ONLY_MONITOR | + RX_FLAG_NO_PSDU)) return true; if (unlikely(skb->len < 16 + present_fcs_len + rtap_space)) @@ -189,6 +190,9 @@ ieee80211_rx_radiotap_hdrlen(struct ieee80211_local *local, BUILD_BUG_ON(sizeof(struct ieee80211_radiotap_he_mu) != 12); } + if (status->flag & RX_FLAG_NO_PSDU) + len += 1; + if (status->flag & RX_FLAG_RADIOTAP_LSIG) { len = ALIGN(len, 2); len += 4; @@ -642,6 +646,12 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, pos += sizeof(he_mu); } + if (status->flag & RX_FLAG_NO_PSDU) { + rthdr->it_present |= + cpu_to_le32(1 << IEEE80211_RADIOTAP_ZERO_LEN_PSDU); + *pos++ = status->zero_length_psdu_type; + } + if (status->flag & RX_FLAG_RADIOTAP_LSIG) { /* ensure 2 byte alignment */ while ((pos - (u8 *)rthdr) & 1) |