1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2010 Rui Paulo <rpaulo@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <sys/param.h>
32 #include <sys/kernel.h>
33 #include <sys/sbuf.h>
34 #include <sys/systm.h>
35 #include <sys/socket.h>
36 #include <sys/malloc.h>
37
38 #include <net/if.h>
39 #include <net/if_media.h>
40 #include <net/ethernet.h>
41 #include <net/route.h>
42
43 #include <net80211/ieee80211_var.h>
44 #include <net80211/ieee80211_ratectl.h>
45
46 static const struct ieee80211_ratectl *ratectls[IEEE80211_RATECTL_MAX];
47
48 static const char *ratectl_modnames[IEEE80211_RATECTL_MAX] = {
49 [IEEE80211_RATECTL_AMRR] = "wlan_amrr",
50 [IEEE80211_RATECTL_RSSADAPT] = "wlan_rssadapt",
51 [IEEE80211_RATECTL_ONOE] = "wlan_onoe",
52 [IEEE80211_RATECTL_SAMPLE] = "wlan_sample",
53 [IEEE80211_RATECTL_NONE] = "wlan_none",
54 };
55
56 MALLOC_DEFINE(M_80211_RATECTL, "80211ratectl", "802.11 rate control");
57
58 void
59 ieee80211_ratectl_register(int type, const struct ieee80211_ratectl *ratectl)
60 {
61 if (type >= IEEE80211_RATECTL_MAX)
62 return;
63 ratectls[type] = ratectl;
64 }
65
66 void
67 ieee80211_ratectl_unregister(int type)
68 {
69 if (type >= IEEE80211_RATECTL_MAX)
70 return;
71 ratectls[type] = NULL;
72 }
73
74 static void
75 ieee80211_ratectl_sysctl_stats_node_iter(void *arg, struct ieee80211_node *ni)
76 {
77
78 struct sbuf *sb = (struct sbuf *) arg;
79 sbuf_printf(sb, "MAC: %6D\n", ni->ni_macaddr, ":");
80 ieee80211_ratectl_node_stats(ni, sb);
81 sbuf_printf(sb, "\n");
82 }
83
84 static int
85 ieee80211_ratectl_sysctl_stats(SYSCTL_HANDLER_ARGS)
86 {
87 struct ieee80211vap *vap = arg1;
88 struct ieee80211com *ic = vap->iv_ic;
89 struct sbuf sb;
90 int error;
91
92 error = sysctl_wire_old_buffer(req, 0);
93 if (error)
94 return (error);
95 sbuf_new_for_sysctl(&sb, NULL, 8, req);
96 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
97
98 IEEE80211_LOCK(ic);
99 ieee80211_iterate_nodes(&ic->ic_sta,
100 ieee80211_ratectl_sysctl_stats_node_iter,
101 &sb);
102 IEEE80211_UNLOCK(ic);
103
104 error = sbuf_finish(&sb);
105 sbuf_delete(&sb);
106 return (error);
107 }
108
109 void
110 ieee80211_ratectl_init(struct ieee80211vap *vap)
111 {
112 if (vap->iv_rate == ratectls[IEEE80211_RATECTL_NONE])
113 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_AMRR);
114 vap->iv_rate->ir_init(vap);
115
116 /* Attach generic stats sysctl */
117 SYSCTL_ADD_PROC(vap->iv_sysctl, SYSCTL_CHILDREN(vap->iv_oid), OID_AUTO,
118 "rate_stats", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, vap,
119 0, ieee80211_ratectl_sysctl_stats, "A", "ratectl node stats");
120 }
121
122 void
123 ieee80211_ratectl_set(struct ieee80211vap *vap, int type)
124 {
125 if (type >= IEEE80211_RATECTL_MAX)
126 return;
127 if (ratectls[type] == NULL) {
128 ieee80211_load_module(ratectl_modnames[type]);
129 if (ratectls[type] == NULL) {
130 IEEE80211_DPRINTF(vap, IEEE80211_MSG_RATECTL,
131 "%s: unable to load algo %u, module %s\n",
132 __func__, type, ratectl_modnames[type]);
133 vap->iv_rate = ratectls[IEEE80211_RATECTL_NONE];
134 return;
135 }
136 }
137 vap->iv_rate = ratectls[type];
138 }
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