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| author | Johannes Berg <johannes.berg@intel.com> | 2015-03-09 11:13:04 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2015-03-30 10:33:19 +0200 |
| commit | 8f9c77fc1e8d4dfc1e7dc631d193162c75feef2e (patch) | |
| tree | d62ce6c08dc235112df22a3524d8266942c5c6bb /net | |
| parent | a38700dd486f3def34cef47d00e2d360a04a7bc8 (diff) | |
| download | linux-8f9c77fc1e8d4dfc1e7dc631d193162c75feef2e.tar.bz2 | |
mac80211: reject aggregation sessions with non-HT peers
If a peer or some local agent (rate control, ...) decides to start
an aggregation session but doesn't support HT (which also implies
QoS), reject it.
This is mostly a corner case as such peers normally won't try to
use block-ack sessions and rate control wouldn't start them, but
technically QoS stations could request it according to the spec.
However, since drivers don't really support such non-HT sessions
it's better to reject them.
Also, while at it, move the tracing for TX sessions earlier so it
captures the error cases as well.
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/agg-rx.c | 8 | ||||
| -rw-r--r-- | net/mac80211/agg-tx.c | 5 |
2 files changed, 12 insertions, 1 deletions
diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c index a48bad468880..2c090c507391 100644 --- a/net/mac80211/agg-rx.c +++ b/net/mac80211/agg-rx.c @@ -234,6 +234,14 @@ void __ieee80211_start_rx_ba_session(struct sta_info *sta, int i, ret = -EOPNOTSUPP; u16 status = WLAN_STATUS_REQUEST_DECLINED; + if (!sta->sta.ht_cap.ht_supported) { + ht_dbg(sta->sdata, + "STA %pM erroneously requests BA session on tid %d w/o QoS\n", + sta->sta.addr, tid); + /* send a response anyway, it's an error case if we get here */ + goto end_no_lock; + } + if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) { ht_dbg(sta->sdata, "Suspend in progress - Denying ADDBA request (%pM tid %d)\n", diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c index 668524aeb0b2..20522492d8cc 100644 --- a/net/mac80211/agg-tx.c +++ b/net/mac80211/agg-tx.c @@ -509,11 +509,14 @@ int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid, struct tid_ampdu_tx *tid_tx; int ret = 0; + trace_api_start_tx_ba_session(pubsta, tid); + if (WARN(sta->reserved_tid == tid, "Requested to start BA session on reserved tid=%d", tid)) return -EINVAL; - trace_api_start_tx_ba_session(pubsta, tid); + if (!pubsta->ht_cap.ht_supported) + return -EINVAL; if (WARN_ON_ONCE(!local->ops->ampdu_action)) return -EINVAL; |