package/mac80211/src/mac80211/rc80211_lowest.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005, Devicescape Software, Inc.
   4  * Copyright (c) 2006-2007 Jiri Benc <jbenc@suse.cz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/init.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/types.h>
  15 #include <linux/slab.h>
  16 #include <linux/skbuff.h>
  17 #include <linux/compiler.h>
  18
  19 #include <net/mac80211.h>
  20 #include "ieee80211_i.h"
  21 #include "ieee80211_rate.h"
  22 #include "debugfs.h"
  23
  24 static void rate_control_lowest_tx_status(void *priv, struct net_device *dev,
  25                                           struct sk_buff *skb,
  26                                           struct ieee80211_tx_status *status)
  27 {
  28 }
  29
  30 static struct ieee80211_rate *
  31 rate_control_lowest_get_rate(void *priv, struct net_device *dev,
  32                              struct sk_buff *skb,
  33                              struct rate_control_extra *extra)
  34 {
  35         struct ieee80211_hw_mode *mode = extra->mode;
  36         int i;
  37
  38         for (i = 0; i < mode->num_rates; i++) {
  39                 struct ieee80211_rate *rate = &mode->rates[i];
  40
  41                 if (rate->flags & IEEE80211_RATE_SUPPORTED)
  42                         return rate;
  43         }
  44         return &mode->rates[0];
  45 }
  46
  47 static void rate_control_lowest_rate_init(void *priv, void *priv_sta,
  48                                           struct ieee80211_local *local,
  49                                           struct sta_info *sta)
  50 {
  51         sta->txrate = 0;
  52 }
  53
  54 static void *rate_control_lowest_alloc(struct ieee80211_local *local)
  55 {
  56         return local;
  57 }
  58
  59 static void rate_control_lowest_free(void *priv)
  60 {
  61 }
  62
  63 static void rate_control_lowest_clear(void *priv)
  64 {
  65 }
  66
  67 static void *rate_control_lowest_alloc_sta(void *priv, gfp_t gfp)
  68 {
  69         return priv;
  70 }
  71
  72 static void rate_control_lowest_free_sta(void *priv, void *priv_sta)
  73 {
  74 }
  75
  76 static struct rate_control_ops rate_control_lowest = {
  77         .module = THIS_MODULE,
  78         .name = "lowest",
  79         .tx_status = rate_control_lowest_tx_status,
  80         .get_rate = rate_control_lowest_get_rate,
  81         .rate_init = rate_control_lowest_rate_init,
  82         .clear = rate_control_lowest_clear,
  83         .alloc = rate_control_lowest_alloc,
  84         .free = rate_control_lowest_free,
  85         .alloc_sta = rate_control_lowest_alloc_sta,
  86         .free_sta = rate_control_lowest_free_sta,
  87 };
  88
  89 static int __init rate_control_lowest_init(void)
  90 {
  91         return ieee80211_rate_control_register(&rate_control_lowest);
  92 }
  93
  94
  95 static void __exit rate_control_lowest_exit(void)
  96 {
  97         ieee80211_rate_control_unregister(&rate_control_lowest);
  98 }
  99
 100
 101 module_init(rate_control_lowest_init);
 102 module_exit(rate_control_lowest_exit);
 103
 104 MODULE_DESCRIPTION("Forced 1 mbps rate control module for mac80211");
 105 MODULE_LICENSE("GPL");
 106