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("$FreeBSD$"); 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 } 137