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mac80211: allow drivers to report (non-)monitor frames

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Some drivers offload some frames internally (e.g.
AddBa). Reporting such frames to mac80211 would
only confuse MLME. However it would be useful to
be able to pass such frames to monitor interfaces
for sniffing purposes, e.g. when running AP +
monitor.

To do that allow drivers to tell mac80211 whether
a given frame should be:
 - processed but not delivered to any monitor vif
 - not processed but delievered to monitor vifs
   only

Signed-off-by: Grzegorz Bajorski <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
This commit is contained in:
Grzegorz Bajorski 2015-12-11 14:39:46 +01:00 • committed by Johannes Berg
commit 178830481e
2 changed files with 14 additions and 2 deletions
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5
net/mac80211/rx.c
View file

@ -122,7 +122,8 @@ static inline bool should_drop_frame(struct sk_buff *skb, int present_fcs_len,
hdr = (void *)(skb->data + rtap_vendor_space);
if (status->flag & (RX_FLAG_FAILED_FCS_CRC |
RX_FLAG_FAILED_PLCP_CRC))
RX_FLAG_FAILED_PLCP_CRC |
RX_FLAG_ONLY_MONITOR))
return true;
if (unlikely(skb->len < 16 + present_fcs_len + rtap_vendor_space))
@ -507,7 +508,7 @@ ieee80211_rx_monitor(struct ieee80211_local *local, struct sk_buff *origskb,
return NULL;
}
if (!local->monitors) {
if (!local->monitors || (status->flag & RX_FLAG_SKIP_MONITOR)) {
if (should_drop_frame(origskb, present_fcs_len,
rtap_vendor_space)) {
dev_kfree_skb(origskb);