Commit 3df6eaea authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville

mac80211: accept public action frames with mismatched BSSID

Arik's patch "mac80211: allow action frames with unknown
BSSID in GO mode" allowed any action frames in P2P mode
to go through, but only to cooked monitor interfaces as
the IEEE80211_RX_RA_MATCH was still cleared. As a result
my no-monitor patches broke invitation responses.

Instead of allowing any action frames in P2P GO mode to
go through with a wrong BSSID like that patch did, allow
all public action frames. They will never be processed
by mac80211, but can be reported via nl80211 then.
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent aa5b5492
......@@ -1694,6 +1694,23 @@ static inline bool ieee80211_is_robust_mgmt_frame(struct ieee80211_hdr *hdr)
return false;
}
/**
* ieee80211_is_public_action - check if frame is a public action frame
* @hdr: the frame
* @len: length of the frame
*/
static inline bool ieee80211_is_public_action(struct ieee80211_hdr *hdr,
size_t len)
{
struct ieee80211_mgmt *mgmt = (void *)hdr;
if (len < IEEE80211_MIN_ACTION_SIZE)
return false;
if (!ieee80211_is_action(hdr->frame_control))
return false;
return mgmt->u.action.category == WLAN_CATEGORY_PUBLIC;
}
/**
* ieee80211_fhss_chan_to_freq - get channel frequency
* @channel: the FHSS channel
......
......@@ -2797,10 +2797,17 @@ static int prepare_for_handlers(struct ieee80211_rx_data *rx,
return 0;
} else if (!ieee80211_bssid_match(bssid,
sdata->vif.addr)) {
/*
* Accept public action frames even when the
* BSSID doesn't match, this is used for P2P
* and location updates. Note that mac80211
* itself never looks at these frames.
*/
if (!(status->rx_flags & IEEE80211_RX_IN_SCAN) &&
ieee80211_is_public_action(hdr, skb->len))
return 1;
if (!(status->rx_flags & IEEE80211_RX_IN_SCAN) &&
!ieee80211_is_beacon(hdr->frame_control) &&
!(ieee80211_is_action(hdr->frame_control) &&
sdata->vif.p2p))
!ieee80211_is_beacon(hdr->frame_control))
return 0;
status->rx_flags &= ~IEEE80211_RX_RA_MATCH;
}
......
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