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 * $FreeBSD: head/sys/net80211/ieee80211_ratectl.c 214894 2010-11-06 18:17:20Z bschmidt $ 26 */ 27 28 #include <sys/param.h> 29 #include <sys/kernel.h> 30 #include <sys/systm.h> 31 #include <sys/socket.h> 32 33 #include <net/if.h> 34 #include <net/if_media.h> 35 36 #include <netproto/802_11/ieee80211_var.h> 37 #include <netproto/802_11/ieee80211_ratectl.h> 38 39 static const struct ieee80211_ratectl *ratectls[IEEE80211_RATECTL_MAX]; 40 41 static const char *ratectl_modnames[IEEE80211_RATECTL_MAX] = { 42 [IEEE80211_RATECTL_AMRR] = "wlan_amrr", 43 [IEEE80211_RATECTL_RSSADAPT] = "wlan_rssadapt", 44 [IEEE80211_RATECTL_ONOE] = "wlan_onoe", 45 [IEEE80211_RATECTL_SAMPLE] = "wlan_sample", 46 [IEEE80211_RATECTL_NONE] = "wlan_none", 47 }; 48 49 MALLOC_DEFINE(M_80211_RATECTL, "80211ratectl", "802.11 rate control"); 50 51 void 52 ieee80211_ratectl_register(int type, const struct ieee80211_ratectl *ratectl) 53 { 54 if (type >= IEEE80211_RATECTL_MAX) 55 return; 56 ratectls[type] = ratectl; 57 } 58 59 void 60 ieee80211_ratectl_unregister(int type) 61 { 62 if (type >= IEEE80211_RATECTL_MAX) 63 return; 64 ratectls[type] = NULL; 65 } 66 67 void 68 ieee80211_ratectl_init(struct ieee80211vap *vap) 69 { 70 if (vap->iv_rate == ratectls[IEEE80211_RATECTL_NONE]) 71 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_AMRR); 72 vap->iv_rate->ir_init(vap); 73 } 74 75 void 76 ieee80211_ratectl_set(struct ieee80211vap *vap, int type) 77 { 78 if (type >= IEEE80211_RATECTL_MAX) 79 return; 80 if (ratectls[type] == NULL) { 81 ieee80211_load_module(ratectl_modnames[type]); 82 if (ratectls[type] == NULL) { 83 IEEE80211_DPRINTF(vap, IEEE80211_MSG_RATECTL, 84 "%s: unable to load algo %u, module %s\n", 85 __func__, type, ratectl_modnames[type]); 86 vap->iv_rate = ratectls[IEEE80211_RATECTL_NONE]; 87 return; 88 } 89 } 90 vap->iv_rate = ratectls[type]; 91 } 92