From: stsp <stsp@openbsd.org>
Date: Wed, 20 Jul 2016 15:40:27 +0000 (+0000)
Subject: In net80211, enable RTS for frames above a particular size (currently 512
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=f1e8586e274dc768f05a13f502fd30b1336c0d73;p=openbsd

In net80211, enable RTS for frames above a particular size (currently 512
bytes). This is what other OS have been doing for years. In our stack this
feature was present but disabled at compile-time by an #ifdef.

This is a low risk change because drivers were already required to use RTS
whenever the AP set the USE_PROTECTION flag in ERP elements of its beacons.

This change allows for reasonable throughput on loaded 11g networks
whereas before they were practically unusable.

tests and ok phessler@
---

diff --git a/sys/net80211/ieee80211_proto.c b/sys/net80211/ieee80211_proto.c
index 0941831675f..9aa63d823d0 100644
--- a/sys/net80211/ieee80211_proto.c
+++ b/sys/net80211/ieee80211_proto.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ieee80211_proto.c,v 1.67 2016/05/18 08:15:28 stsp Exp $	*/
+/*	$OpenBSD: ieee80211_proto.c,v 1.68 2016/07/20 15:40:27 stsp Exp $	*/
 /*	$NetBSD: ieee80211_proto.c,v 1.8 2004/04/30 23:58:20 dyoung Exp $	*/
 
 /*-
@@ -88,11 +88,7 @@ ieee80211_proto_attach(struct ifnet *ifp)
 
 	ifp->if_hdrlen = sizeof(struct ieee80211_frame);
 
-#ifdef notdef
 	ic->ic_rtsthreshold = IEEE80211_RTS_DEFAULT;
-#else
-	ic->ic_rtsthreshold = IEEE80211_RTS_MAX;
-#endif
 	ic->ic_fragthreshold = 2346;		/* XXX not used yet */
 	ic->ic_fixed_rate = -1;			/* no fixed rate */
 	ic->ic_fixed_mcs = -1;			/* no fixed mcs */