1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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/param.h>
29 #include <sys/kernel.h>
30 #include <sys/sbuf.h>
31 #include <sys/systm.h>
32 #include <sys/socket.h>
33 #include <sys/malloc.h>
34
35 #include <net/if.h>
36 #include <net/if_media.h>
37 #include <net/ethernet.h>
38 #include <net/route.h>
39
40 #include <net80211/ieee80211_var.h>
41 #include <net80211/ieee80211_ratectl.h>
42
43 static const struct ieee80211_ratectl *ratectls[IEEE80211_RATECTL_MAX];
44
45 static const char *ratectl_modnames[IEEE80211_RATECTL_MAX] = {
46 [IEEE80211_RATECTL_AMRR] = "wlan_amrr",
47 [IEEE80211_RATECTL_RSSADAPT] = "wlan_rssadapt",
48 [IEEE80211_RATECTL_ONOE] = "wlan_onoe",
49 [IEEE80211_RATECTL_SAMPLE] = "wlan_sample",
50 [IEEE80211_RATECTL_NONE] = "wlan_none",
51 };
52
53 MALLOC_DEFINE(M_80211_RATECTL, "80211ratectl", "802.11 rate control");
54
55 void
ieee80211_ratectl_register(int type,const struct ieee80211_ratectl * ratectl)56 ieee80211_ratectl_register(int type, const struct ieee80211_ratectl *ratectl)
57 {
58 if (type >= IEEE80211_RATECTL_MAX)
59 return;
60 ratectls[type] = ratectl;
61 }
62
63 void
ieee80211_ratectl_unregister(int type)64 ieee80211_ratectl_unregister(int type)
65 {
66 if (type >= IEEE80211_RATECTL_MAX)
67 return;
68 ratectls[type] = NULL;
69 }
70
71 static void
ieee80211_ratectl_sysctl_stats_node_iter(void * arg,struct ieee80211_node * ni)72 ieee80211_ratectl_sysctl_stats_node_iter(void *arg, struct ieee80211_node *ni)
73 {
74
75 struct sbuf *sb = (struct sbuf *) arg;
76 sbuf_printf(sb, "MAC: %6D\n", ni->ni_macaddr, ":");
77 ieee80211_ratectl_node_stats(ni, sb);
78 sbuf_printf(sb, "\n");
79 }
80
81 static int
ieee80211_ratectl_sysctl_stats(SYSCTL_HANDLER_ARGS)82 ieee80211_ratectl_sysctl_stats(SYSCTL_HANDLER_ARGS)
83 {
84 struct ieee80211vap *vap = arg1;
85 struct ieee80211com *ic = vap->iv_ic;
86 struct sbuf sb;
87 int error;
88
89 error = sysctl_wire_old_buffer(req, 0);
90 if (error)
91 return (error);
92 sbuf_new_for_sysctl(&sb, NULL, 8, req);
93 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
94
95 IEEE80211_LOCK(ic);
96 ieee80211_iterate_nodes(&ic->ic_sta,
97 ieee80211_ratectl_sysctl_stats_node_iter,
98 &sb);
99 IEEE80211_UNLOCK(ic);
100
101 error = sbuf_finish(&sb);
102 sbuf_delete(&sb);
103 return (error);
104 }
105
106 void
ieee80211_ratectl_init(struct ieee80211vap * vap)107 ieee80211_ratectl_init(struct ieee80211vap *vap)
108 {
109 if (vap->iv_rate == ratectls[IEEE80211_RATECTL_NONE])
110 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_AMRR);
111 vap->iv_rate->ir_init(vap);
112
113 /* Attach generic stats sysctl */
114 SYSCTL_ADD_PROC(vap->iv_sysctl, SYSCTL_CHILDREN(vap->iv_oid), OID_AUTO,
115 "rate_stats", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, vap,
116 0, ieee80211_ratectl_sysctl_stats, "A", "ratectl node stats");
117 }
118
119 void
ieee80211_ratectl_set(struct ieee80211vap * vap,int type)120 ieee80211_ratectl_set(struct ieee80211vap *vap, int type)
121 {
122 if (type >= IEEE80211_RATECTL_MAX)
123 return;
124 if (ratectls[type] == NULL) {
125 ieee80211_load_module(ratectl_modnames[type]);
126 if (ratectls[type] == NULL) {
127 IEEE80211_DPRINTF(vap, IEEE80211_MSG_RATECTL,
128 "%s: unable to load algo %u, module %s\n",
129 __func__, type, ratectl_modnames[type]);
130 vap->iv_rate = ratectls[IEEE80211_RATECTL_NONE];
131 return;
132 }
133 }
134 vap->iv_rate = ratectls[type];
135 }
136