1 /*-
2 * Copyright (c) 2010 Rui Paulo <rpaulo@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD: releng/11.2/sys/net80211/ieee80211_ratectl.c 296925 2016-03-16 02:07:04Z adrian $");
28
29 #include <sys/param.h>
30 #include <sys/kernel.h>
31 #include <sys/sbuf.h>
32 #include <sys/systm.h>
33 #include <sys/socket.h>
34 #include <sys/malloc.h>
35
36 #include <net/if.h>
37 #include <net/if_media.h>
38 #include <net/ethernet.h>
39 #include <net/route.h>
40
41 #include <net80211/ieee80211_var.h>
42 #include <net80211/ieee80211_ratectl.h>
43
44 static const struct ieee80211_ratectl *ratectls[IEEE80211_RATECTL_MAX];
45
46 static const char *ratectl_modnames[IEEE80211_RATECTL_MAX] = {
47 [IEEE80211_RATECTL_AMRR] = "wlan_amrr",
48 [IEEE80211_RATECTL_RSSADAPT] = "wlan_rssadapt",
49 [IEEE80211_RATECTL_ONOE] = "wlan_onoe",
50 [IEEE80211_RATECTL_SAMPLE] = "wlan_sample",
51 [IEEE80211_RATECTL_NONE] = "wlan_none",
52 };
53
54 MALLOC_DEFINE(M_80211_RATECTL, "80211ratectl", "802.11 rate control");
55
56 void
57 ieee80211_ratectl_register(int type, const struct ieee80211_ratectl *ratectl)
58 {
59 if (type >= IEEE80211_RATECTL_MAX)
60 return;
61 ratectls[type] = ratectl;
62 }
63
64 void
65 ieee80211_ratectl_unregister(int type)
66 {
67 if (type >= IEEE80211_RATECTL_MAX)
68 return;
69 ratectls[type] = NULL;
70 }
71
72 static void
73 ieee80211_ratectl_sysctl_stats_node_iter(void *arg, struct ieee80211_node *ni)
74 {
75
76 struct sbuf *sb = (struct sbuf *) arg;
77 sbuf_printf(sb, "MAC: %6D\n", ni->ni_macaddr, ":");
78 ieee80211_ratectl_node_stats(ni, sb);
79 sbuf_printf(sb, "\n");
80 }
81
82 static int
83 ieee80211_ratectl_sysctl_stats(SYSCTL_HANDLER_ARGS)
84 {
85 struct ieee80211vap *vap = arg1;
86 struct ieee80211com *ic = vap->iv_ic;
87 struct sbuf sb;
88 int error;
89
90 error = sysctl_wire_old_buffer(req, 0);
91 if (error)
92 return (error);
93 sbuf_new_for_sysctl(&sb, NULL, 8, req);
94 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
95
96 IEEE80211_LOCK(ic);
97 ieee80211_iterate_nodes(&ic->ic_sta,
98 ieee80211_ratectl_sysctl_stats_node_iter,
99 &sb);
100 IEEE80211_UNLOCK(ic);
101
102 error = sbuf_finish(&sb);
103 sbuf_delete(&sb);
104 return (error);
105 }
106
107 void
108 ieee80211_ratectl_init(struct ieee80211vap *vap)
109 {
110 if (vap->iv_rate == ratectls[IEEE80211_RATECTL_NONE])
111 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_AMRR);
112 vap->iv_rate->ir_init(vap);
113
114 /* Attach generic stats sysctl */
115 SYSCTL_ADD_PROC(vap->iv_sysctl, SYSCTL_CHILDREN(vap->iv_oid), OID_AUTO,
116 "rate_stats", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, vap,
117 0, ieee80211_ratectl_sysctl_stats, "A", "ratectl node stats");
118 }
119
120 void
121 ieee80211_ratectl_set(struct ieee80211vap *vap, int type)
122 {
123 if (type >= IEEE80211_RATECTL_MAX)
124 return;
125 if (ratectls[type] == NULL) {
126 ieee80211_load_module(ratectl_modnames[type]);
127 if (ratectls[type] == NULL) {
128 IEEE80211_DPRINTF(vap, IEEE80211_MSG_RATECTL,
129 "%s: unable to load algo %u, module %s\n",
130 __func__, type, ratectl_modnames[type]);
131 vap->iv_rate = ratectls[IEEE80211_RATECTL_NONE];
132 return;
133 }
134 }
135 vap->iv_rate = ratectls[type];
136 }
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