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run(4): properly set F_DATAPAD radiotap flag if frame has padding between

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frame header and data.

This will fix 'Mysterious OLPC stuff' for received frames and wrong
CCMP / TKIP / data decoding for transmitted frames in net/wireshark
dissector.

While here, drop unneeded comment - net80211 handles padding requirements
for Tx & Rx without driver adjustment.

Tested with D-Link DWA-140 rev B3, STA mode.

MFC after:	1 week
This commit is contained in:
Andriy Voskoboinyk 2019-03-31 14:18:02 +00:00
parent e4c17012d0
commit 1ea35ead5a
1 changed files with 11 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
sys/dev/usb/wlan/if_run.c
View File

@ -2851,10 +2851,6 @@ run_rx_frame(struct run_softc *sc, struct mbuf *m, uint32_t dmalen)
}
if (flags & RT2860_RX_L2PAD) {
/*
* XXX OpenBSD removes padding between header
* and payload here...
*/
RUN_DPRINTF(sc, RUN_DEBUG_RECV,
"received RT2860_RX_L2PAD frame\n");
len += 2;
@ -2896,6 +2892,8 @@ run_rx_frame(struct run_softc *sc, struct mbuf *m, uint32_t dmalen)
uint16_t phy;
tap->wr_flags = 0;
if (flags & RT2860_RX_L2PAD)
tap->wr_flags |= IEEE80211_RADIOTAP_F_DATAPAD;
tap->wr_antsignal = rssi;
tap->wr_antenna = ant;
tap->wr_dbm_antsignal = run_rssi2dbm(sc, rssi, ant);
@ -3162,14 +3160,23 @@ run_bulk_tx_callbackN(struct usb_xfer *xfer, usb_error_t error, u_int index)
vap = data->ni->ni_vap;
if (ieee80211_radiotap_active_vap(vap)) {
const struct ieee80211_frame *wh;
struct run_tx_radiotap_header *tap = &sc->sc_txtap;
struct rt2860_txwi *txwi =
(struct rt2860_txwi *)(&data->desc + sizeof(struct rt2870_txd));
int has_l2pad;
wh = mtod(m, struct ieee80211_frame *);
has_l2pad = IEEE80211_HAS_ADDR4(wh) !=
IEEE80211_QOS_HAS_SEQ(wh);
tap->wt_flags = 0;
tap->wt_rate = rt2860_rates[data->ridx].rate;
tap->wt_hwqueue = index;
if (le16toh(txwi->phy) & RT2860_PHY_SHPRE)
tap->wt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
if (has_l2pad)
tap->wt_flags |= IEEE80211_RADIOTAP_F_DATAPAD;
ieee80211_radiotap_tx(vap, m);
}