net/ieee80211/ieee80211_module.c

   1 /*******************************************************************************
   2
   3   Copyright(c) 2004 Intel Corporation. All rights reserved.
   4
   5   Portions of this file are based on the WEP enablement code provided by the
   6   Host AP project hostap-drivers v0.1.3
   7   Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   8   <jkmaline@cc.hut.fi>
   9   Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
  10
  11   This program is free software; you can redistribute it and/or modify it
  12   under the terms of version 2 of the GNU General Public License as
  13   published by the Free Software Foundation.
  14
  15   This program is distributed in the hope that it will be useful, but WITHOUT
  16   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  18   more details.
  19
  20   You should have received a copy of the GNU General Public License along with
  21   this program; if not, write to the Free Software Foundation, Inc., 59
  22   Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  23
  24   The full GNU General Public License is included in this distribution in the
  25   file called LICENSE.
  26
  27   Contact Information:
  28   James P. Ketrenos <ipw2100-admin@linux.intel.com>
  29   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30
  31 *******************************************************************************/
  32
  33 #include <linux/compiler.h>
  34 #include <linux/config.h>
  35 #include <linux/errno.h>
  36 #include <linux/if_arp.h>
  37 #include <linux/in6.h>
  38 #include <linux/in.h>
  39 #include <linux/ip.h>
  40 #include <linux/kernel.h>
  41 #include <linux/module.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/pci.h>
  44 #include <linux/proc_fs.h>
  45 #include <linux/skbuff.h>
  46 #include <linux/slab.h>
  47 #include <linux/tcp.h>
  48 #include <linux/types.h>
  49 #include <linux/version.h>
  50 #include <linux/wireless.h>
  51 #include <linux/etherdevice.h>
  52 #include <asm/uaccess.h>
  53 #include <net/arp.h>
  54
  55 #include <net/ieee80211.h>
  56
  57 MODULE_DESCRIPTION("802.11 data/management/control stack");
  58 MODULE_AUTHOR("Copyright (C) 2004 Intel Corporation <jketreno@linux.intel.com>");
  59 MODULE_LICENSE("GPL");
  60
  61 #define DRV_NAME "ieee80211"
  62
  63 static inline int ieee80211_networks_allocate(struct ieee80211_device *ieee)
  64 {
  65         if (ieee->networks)
  66                 return 0;
  67
  68         ieee->networks = kmalloc(
  69                 MAX_NETWORK_COUNT * sizeof(struct ieee80211_network),
  70                 GFP_KERNEL);
  71         if (!ieee->networks) {
  72                 printk(KERN_WARNING "%s: Out of memory allocating beacons\n",
  73                        ieee->dev->name);
  74                 return -ENOMEM;
  75         }
  76
  77         memset(ieee->networks, 0,
  78                MAX_NETWORK_COUNT * sizeof(struct ieee80211_network));
  79
  80         return 0;
  81 }
  82
  83 static inline void ieee80211_networks_free(struct ieee80211_device *ieee)
  84 {
  85         if (!ieee->networks)
  86                 return;
  87         kfree(ieee->networks);
  88         ieee->networks = NULL;
  89 }
  90
  91 static inline void ieee80211_networks_initialize(struct ieee80211_device *ieee)
  92 {
  93         int i;
  94
  95         INIT_LIST_HEAD(&ieee->network_free_list);
  96         INIT_LIST_HEAD(&ieee->network_list);
  97         for (i = 0; i < MAX_NETWORK_COUNT; i++)
  98                 list_add_tail(&ieee->networks[i].list, &ieee->network_free_list);
  99 }
 100
 101
 102 struct net_device *alloc_ieee80211(int sizeof_priv)
 103 {
 104         struct ieee80211_device *ieee;
 105         struct net_device *dev;
 106         int err;
 107
 108         IEEE80211_DEBUG_INFO("Initializing...\n");
 109
 110         dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv);
 111         if (!dev) {
 112                 IEEE80211_ERROR("Unable to network device.\n");
 113                 goto failed;
 114         }
 115         ieee = netdev_priv(dev);
 116         dev->hard_start_xmit = ieee80211_xmit;
 117
 118         ieee->dev = dev;
 119
 120         err = ieee80211_networks_allocate(ieee);
 121         if (err) {
 122                 IEEE80211_ERROR("Unable to allocate beacon storage: %d\n",
 123                                 err);
 124                 goto failed;
 125         }
 126         ieee80211_networks_initialize(ieee);
 127
 128         /* Default fragmentation threshold is maximum payload size */
 129         ieee->fts = DEFAULT_FTS;
 130         ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
 131         ieee->open_wep = 1;
 132
 133         /* Default to enabling full open WEP with host based encrypt/decrypt */
 134         ieee->host_encrypt = 1;
 135         ieee->host_decrypt = 1;
 136         ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
 137
 138         INIT_LIST_HEAD(&ieee->crypt_deinit_list);
 139         init_timer(&ieee->crypt_deinit_timer);
 140         ieee->crypt_deinit_timer.data = (unsigned long)ieee;
 141         ieee->crypt_deinit_timer.function = ieee80211_crypt_deinit_handler;
 142
 143         spin_lock_init(&ieee->lock);
 144
 145         ieee->wpa_enabled = 0;
 146         ieee->tkip_countermeasures = 0;
 147         ieee->drop_unencrypted = 0;
 148         ieee->privacy_invoked = 0;
 149         ieee->ieee802_1x = 1;
 150
 151         return dev;
 152
 153  failed:
 154         if (dev)
 155                 free_netdev(dev);
 156         return NULL;
 157 }
 158
 159
 160 void free_ieee80211(struct net_device *dev)
 161 {
 162         struct ieee80211_device *ieee = netdev_priv(dev);
 163
 164         int i;
 165
 166         del_timer_sync(&ieee->crypt_deinit_timer);
 167         ieee80211_crypt_deinit_entries(ieee, 1);
 168
 169         for (i = 0; i < WEP_KEYS; i++) {
 170                 struct ieee80211_crypt_data *crypt = ieee->crypt[i];
 171                 if (crypt) {
 172                         if (crypt->ops) {
 173                                 crypt->ops->deinit(crypt->priv);
 174                                 module_put(crypt->ops->owner);
 175                         }
 176                         kfree(crypt);
 177                         ieee->crypt[i] = NULL;
 178                 }
 179         }
 180
 181         ieee80211_networks_free(ieee);
 182         free_netdev(dev);
 183 }
 184
 185 #ifdef CONFIG_IEEE80211_DEBUG
 186
 187 static int debug = 0;
 188 u32 ieee80211_debug_level = 0;
 189 struct proc_dir_entry *ieee80211_proc = NULL;
 190
 191 static int show_debug_level(char *page, char **start, off_t offset,
 192                             int count, int *eof, void *data)
 193 {
 194         return snprintf(page, count, "0x%08X\n", ieee80211_debug_level);
 195 }
 196
 197 static int store_debug_level(struct file *file, const char __user *buffer,
 198                              unsigned long count, void *data)
 199 {
 200         char buf[] = "0x00000000";
 201         char *p = (char *)buf;
 202         unsigned long val;
 203
 204         if (count > sizeof(buf) - 1)
 205                 count = sizeof(buf) - 1;
 206
 207         if (copy_from_user(buf, buffer, count))
 208                 return count;
 209         buf[count] = 0;
 210         /*
 211          * what a FPOS...  What, sscanf(buf, "%i", &val) would be too
 212          * scary?
 213          */
 214         if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
 215                 p++;
 216                 if (p[0] == 'x' || p[0] == 'X')
 217                         p++;
 218                 val = simple_strtoul(p, &p, 16);
 219         } else
 220                 val = simple_strtoul(p, &p, 10);
 221         if (p == buf)
 222                 printk(KERN_INFO DRV_NAME
 223                        ": %s is not in hex or decimal form.\n", buf);
 224         else
 225                 ieee80211_debug_level = val;
 226
 227         return strlen(buf);
 228 }
 229
 230 static int __init ieee80211_init(void)
 231 {
 232         struct proc_dir_entry *e;
 233
 234         ieee80211_debug_level = debug;
 235         ieee80211_proc = create_proc_entry(DRV_NAME, S_IFDIR, proc_net);
 236         if (ieee80211_proc == NULL) {
 237                 IEEE80211_ERROR("Unable to create " DRV_NAME
 238                                 " proc directory\n");
 239                 return -EIO;
 240         }
 241         e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
 242                               ieee80211_proc);
 243         if (!e) {
 244                 remove_proc_entry(DRV_NAME, proc_net);
 245                 ieee80211_proc = NULL;
 246                 return -EIO;
 247         }
 248         e->read_proc = show_debug_level;
 249         e->write_proc = store_debug_level;
 250         e->data = NULL;
 251
 252         return 0;
 253 }
 254
 255 static void __exit ieee80211_exit(void)
 256 {
 257         if (ieee80211_proc) {
 258                 remove_proc_entry("debug_level", ieee80211_proc);
 259                 remove_proc_entry(DRV_NAME, proc_net);
 260                 ieee80211_proc = NULL;
 261         }
 262 }
 263
 264 #include <linux/moduleparam.h>
 265 module_param(debug, int, 0444);
 266 MODULE_PARM_DESC(debug, "debug output mask");
 267
 268
 269 module_exit(ieee80211_exit);
 270 module_init(ieee80211_init);
 271 #endif
 272
 273 EXPORT_SYMBOL(alloc_ieee80211);
 274 EXPORT_SYMBOL(free_ieee80211);