device-independent implementation of AMRR tx rate control algorithm

Obtained from:	openbsd (w/ mods)
MFC after:	1 month

1 files changed, 64 insertions, 0 deletions

diff --git a/sys/net80211/ieee80211_amrr.h b/sys/net80211/ieee80211_amrr.h
new file mode 100644
index 0000000..947d617
--- /dev/null
+++ b/sys/net80211/ieee80211_amrr.h
@@ -0,0 +1,64 @@
+/* $FreeBSD$ */
+/*	$OpenBSD: ieee80211_amrr.h,v 1.3 2006/06/17 19:34:31 damien Exp $	*/
+
+/*-
+ * Copyright (c) 2006
+ *	Damien Bergamini <damien.bergamini@free.fr>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#ifndef _NET80211_IEEE80211_AMRR_H_
+#define _NET80211_IEEE80211_AMRR_H_
+
+/*-
+ * Naive implementation of the Adaptive Multi Rate Retry algorithm:
+ *
+ * "IEEE 802.11 Rate Adaptation: A Practical Approach"
+ *  Mathieu Lacage, Hossein Manshaei, Thierry Turletti
+ *  INRIA Sophia - Projet Planete
+ *  http://www-sop.inria.fr/rapports/sophia/RR-5208.html
+ */
+
+/*
+ * Rate control settings.
+ */
+struct ieee80211com;
+
+struct ieee80211_amrr {
+	u_int	amrr_min_success_threshold;
+	u_int	amrr_max_success_threshold;
+	struct ieee80211com *amrr_ic;
+};
+
+#define IEEE80211_AMRR_MIN_SUCCESS_THRESHOLD	 1
+#define IEEE80211_AMRR_MAX_SUCCESS_THRESHOLD	15
+
+/*
+ * Rate control state for a given node.
+ */
+struct ieee80211_amrr_node {
+	u_int	amn_success;
+	u_int	amn_recovery;
+	u_int	amn_success_threshold;
+	u_int	amn_txcnt;
+	u_int	amn_retrycnt;
+};
+
+void	ieee80211_amrr_init(struct ieee80211_amrr *,
+	    struct ieee80211com *ic, int, int);
+void	ieee80211_amrr_node_init(struct ieee80211_amrr *,
+	    struct ieee80211_amrr_node *);
+void	ieee80211_amrr_choose(struct ieee80211_amrr *, struct ieee80211_node *,
+	    struct ieee80211_amrr_node *);
+
+#endif /* _NET80211_IEEE80211_AMRR_H_ */