Author: adrian
Date: Mon Mar 28 11:48:49 2011
New Revision: 220098
URL: http://svn.freebsd.org/changeset/base/220098
Log:
Add in HT protection but disable it by default.
I'll clear how it's supposed to work with Bernhard and then look
at enabling this in the correct situations.
But this -does- enable HT RTS protection (using the appropriate legacy
rates) if this bit of code is enabled.
Modified:
head/sys/dev/ath/if_ath_tx.c
Modified: head/sys/dev/ath/if_ath_tx.c
==============================================================================
--- head/sys/dev/ath/if_ath_tx.c Mon Mar 28 11:08:58 2011
(r220097)
+++ head/sys/dev/ath/if_ath_tx.c Mon Mar 28 11:48:49 2011
(r220098)
@@ -702,6 +702,24 @@ ath_tx_start(struct ath_softc *sc, struc
sc->sc_stats.ast_tx_protect++;
}
+#if 0
+ /*
+ * If 11n protection is enabled and it's a HT frame,
+ * enable RTS.
+ *
+ * XXX ic_htprotmode or ic_curhtprotmode?
+ * XXX should it_htprotmode only matter if ic_curhtprotmode
+ * XXX indicates it's not a HT pure environment?
+ */
+ if ((ic->ic_htprotmode == IEEE80211_PROT_RTSCTS) &&
+ rt->info[rix].phy == IEEE80211_T_HT &&
+ (flags & HAL_TXDESC_NOACK) == 0) {
+ cix = rt->info[sc->sc_protrix].controlRate;
+ flags |= HAL_TXDESC_RTSENA;
+ sc->sc_stats.ast_tx_htprotect++;
+ }
+#endif
+
/*
* Calculate duration. This logically belongs in the 802.11
* layer but it lacks sufficient information to calculate it.
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