/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2010 Rui Paulo <rpaulo@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/sbuf.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/malloc.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/ethernet.h>
#include <net/route.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_ratectl.h>
static const struct ieee80211_ratectl *ratectls[IEEE80211_RATECTL_MAX];
static const char *ratectl_modnames[IEEE80211_RATECTL_MAX] = {
[IEEE80211_RATECTL_AMRR] = "wlan_amrr",
[IEEE80211_RATECTL_RSSADAPT] = "wlan_rssadapt",
[IEEE80211_RATECTL_ONOE] = "wlan_onoe",
[IEEE80211_RATECTL_SAMPLE] = "wlan_sample",
[IEEE80211_RATECTL_NONE] = "wlan_none",
};
MALLOC_DEFINE(M_80211_RATECTL, "80211ratectl", "802.11 rate control");
void
ieee80211_ratectl_register(int type, const struct ieee80211_ratectl *ratectl)
{
if (type >= IEEE80211_RATECTL_MAX)
return;
ratectls[type] = ratectl;
}
void
ieee80211_ratectl_unregister(int type)
{
if (type >= IEEE80211_RATECTL_MAX)
return;
ratectls[type] = NULL;
}
static void
ieee80211_ratectl_sysctl_stats_node_iter(void *arg, struct ieee80211_node *ni)
{
struct sbuf *sb = (struct sbuf *) arg;
sbuf_printf(sb, "MAC: %6D\n", ni->ni_macaddr, ":");
ieee80211_ratectl_node_stats(ni, sb);
sbuf_printf(sb, "\n");
}
static int
ieee80211_ratectl_sysctl_stats(SYSCTL_HANDLER_ARGS)
{
struct ieee80211vap *vap = arg1;
struct ieee80211com *ic = vap->iv_ic;
struct sbuf sb;
int error;
error = sysctl_wire_old_buffer(req, 0);
if (error)
return (error);
sbuf_new_for_sysctl(&sb, NULL, 8, req);
sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
IEEE80211_LOCK(ic);
ieee80211_iterate_nodes(&ic->ic_sta,
ieee80211_ratectl_sysctl_stats_node_iter,
&sb);
IEEE80211_UNLOCK(ic);
error = sbuf_finish(&sb);
sbuf_delete(&sb);
return (error);
}
void
ieee80211_ratectl_init(struct ieee80211vap *vap)
{
if (vap->iv_rate == ratectls[IEEE80211_RATECTL_NONE])
ieee80211_ratectl_set(vap, IEEE80211_RATECTL_AMRR);
vap->iv_rate->ir_init(vap);
/* Attach generic stats sysctl */
SYSCTL_ADD_PROC(vap->iv_sysctl, SYSCTL_CHILDREN(vap->iv_oid), OID_AUTO,
"rate_stats", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, vap,
0, ieee80211_ratectl_sysctl_stats, "A", "ratectl node stats");
}
void
ieee80211_ratectl_set(struct ieee80211vap *vap, int type)
{
if (type >= IEEE80211_RATECTL_MAX)
return;
if (ratectls[type] == NULL) {
ieee80211_load_module(ratectl_modnames[type]);
if (ratectls[type] == NULL) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_RATECTL,
"%s: unable to load algo %u, module %s\n",
__func__, type, ratectl_modnames[type]);
vap->iv_rate = ratectls[IEEE80211_RATECTL_NONE];
return;
}
}
vap->iv_rate = ratectls[type];
}
