drivers/staging/rtl8192e/rtllib_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/errno.h>
  35 #include <linux/if_arp.h>
  36 #include <linux/in6.h>
  37 #include <linux/in.h>
  38 #include <linux/ip.h>
  39 #include <linux/kernel.h>
  40 #include <linux/module.h>
  41 #include <linux/netdevice.h>
  42 #include <linux/pci.h>
  43 #include <linux/proc_fs.h>
  44 #include <linux/skbuff.h>
  45 #include <linux/slab.h>
  46 #include <linux/tcp.h>
  47 #include <linux/types.h>
  48 #include <linux/wireless.h>
  49 #include <linux/etherdevice.h>
  50 #include <linux/uaccess.h>
  51 #include <net/arp.h>
  52
  53 #include "rtllib.h"
  54
  55
  56 u32 rt_global_debug_component = COMP_ERR;
  57 EXPORT_SYMBOL(rt_global_debug_component);
  58
  59
  60 void _setup_timer(struct timer_list *ptimer, void *fun, unsigned long data)
  61 {
  62         ptimer->function = fun;
  63         ptimer->data = data;
  64         init_timer(ptimer);
  65 }
  66
  67 static inline int rtllib_networks_allocate(struct rtllib_device *ieee)
  68 {
  69         if (ieee->networks)
  70                 return 0;
  71
  72         ieee->networks = kzalloc(
  73                 MAX_NETWORK_COUNT * sizeof(struct rtllib_network),
  74                 GFP_KERNEL);
  75         if (!ieee->networks) {
  76                 printk(KERN_WARNING "%s: Out of memory allocating beacons\n",
  77                        ieee->dev->name);
  78                 return -ENOMEM;
  79         }
  80
  81         return 0;
  82 }
  83
  84 static inline void rtllib_networks_free(struct rtllib_device *ieee)
  85 {
  86         if (!ieee->networks)
  87                 return;
  88         kfree(ieee->networks);
  89         ieee->networks = NULL;
  90 }
  91
  92 static inline void rtllib_networks_initialize(struct rtllib_device *ieee)
  93 {
  94         int i;
  95
  96         INIT_LIST_HEAD(&ieee->network_free_list);
  97         INIT_LIST_HEAD(&ieee->network_list);
  98         for (i = 0; i < MAX_NETWORK_COUNT; i++)
  99                 list_add_tail(&ieee->networks[i].list,
 100                               &ieee->network_free_list);
 101 }
 102
 103 struct net_device *alloc_rtllib(int sizeof_priv)
 104 {
 105         struct rtllib_device *ieee = NULL;
 106         struct net_device *dev;
 107         int i, err;
 108
 109         RTLLIB_DEBUG_INFO("Initializing...\n");
 110
 111         dev = alloc_etherdev(sizeof(struct rtllib_device) + sizeof_priv);
 112         if (!dev) {
 113                 RTLLIB_ERROR("Unable to network device.\n");
 114                 goto failed;
 115         }
 116         ieee = (struct rtllib_device *)netdev_priv_rsl(dev);
 117         memset(ieee, 0, sizeof(struct rtllib_device)+sizeof_priv);
 118         ieee->dev = dev;
 119
 120         err = rtllib_networks_allocate(ieee);
 121         if (err) {
 122                 RTLLIB_ERROR("Unable to allocate beacon storage: %d\n",
 123                                 err);
 124                 goto failed;
 125         }
 126         rtllib_networks_initialize(ieee);
 127
 128
 129         /* Default fragmentation threshold is maximum payload size */
 130         ieee->fts = DEFAULT_FTS;
 131         ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
 132         ieee->open_wep = 1;
 133
 134         /* Default to enabling full open WEP with host based encrypt/decrypt */
 135         ieee->host_encrypt = 1;
 136         ieee->host_decrypt = 1;
 137         ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
 138
 139         ieee->rtllib_ap_sec_type = rtllib_ap_sec_type;
 140
 141         spin_lock_init(&ieee->lock);
 142         spin_lock_init(&ieee->wpax_suitlist_lock);
 143         spin_lock_init(&ieee->bw_spinlock);
 144         spin_lock_init(&ieee->reorder_spinlock);
 145         atomic_set(&(ieee->atm_chnlop), 0);
 146         atomic_set(&(ieee->atm_swbw), 0);
 147
 148         /* SAM FIXME */
 149         lib80211_crypt_info_init(&ieee->crypt_info, "RTLLIB", &ieee->lock);
 150
 151         ieee->bHalfNMode = false;
 152         ieee->wpa_enabled = 0;
 153         ieee->tkip_countermeasures = 0;
 154         ieee->drop_unencrypted = 0;
 155         ieee->privacy_invoked = 0;
 156         ieee->ieee802_1x = 1;
 157         ieee->raw_tx = 0;
 158         ieee->hwsec_active = 0;
 159
 160         memset(ieee->swcamtable, 0, sizeof(struct sw_cam_table) * 32);
 161         rtllib_softmac_init(ieee);
 162
 163         ieee->pHTInfo = kzalloc(sizeof(struct rt_hi_throughput), GFP_KERNEL);
 164         if (ieee->pHTInfo == NULL) {
 165                 RTLLIB_DEBUG(RTLLIB_DL_ERR, "can't alloc memory for HTInfo\n");
 166                 return NULL;
 167         }
 168         HTUpdateDefaultSetting(ieee);
 169         HTInitializeHTInfo(ieee);
 170         TSInitialize(ieee);
 171         for (i = 0; i < IEEE_IBSS_MAC_HASH_SIZE; i++)
 172                 INIT_LIST_HEAD(&ieee->ibss_mac_hash[i]);
 173
 174         for (i = 0; i < 17; i++) {
 175                 ieee->last_rxseq_num[i] = -1;
 176                 ieee->last_rxfrag_num[i] = -1;
 177                 ieee->last_packet_time[i] = 0;
 178         }
 179
 180         return dev;
 181
 182  failed:
 183         if (dev)
 184                 free_netdev(dev);
 185         return NULL;
 186 }
 187 EXPORT_SYMBOL(alloc_rtllib);
 188
 189 void free_rtllib(struct net_device *dev)
 190 {
 191         struct rtllib_device *ieee = (struct rtllib_device *)
 192                                       netdev_priv_rsl(dev);
 193
 194         kfree(ieee->pHTInfo);
 195         ieee->pHTInfo = NULL;
 196         rtllib_softmac_free(ieee);
 197
 198         lib80211_crypt_info_free(&ieee->crypt_info);
 199
 200         rtllib_networks_free(ieee);
 201         free_netdev(dev);
 202 }
 203 EXPORT_SYMBOL(free_rtllib);
 204
 205 u32 rtllib_debug_level;
 206 static int debug = \
 207                             RTLLIB_DL_ERR
 208                             ;
 209 static struct proc_dir_entry *rtllib_proc;
 210
 211 static int show_debug_level(struct seq_file *m, void *v)
 212 {
 213         return seq_printf(m, "0x%08X\n", rtllib_debug_level);
 214 }
 215
 216 static ssize_t write_debug_level(struct file *file, const char __user *buffer,
 217                              size_t count, loff_t *ppos)
 218 {
 219         unsigned long val;
 220         int err = kstrtoul_from_user(buffer, count, 0, &val);
 221         if (err)
 222                 return err;
 223         rtllib_debug_level = val;
 224         return count;
 225 }
 226
 227 static int open_debug_level(struct inode *inode, struct file *file)
 228 {
 229         return single_open(file, show_debug_level, NULL);
 230 }
 231
 232 static const struct file_operations fops = {
 233         .open = open_debug_level,
 234         .read = seq_read,
 235         .llseek = seq_lseek,
 236         .write = write_debug_level,
 237         .release = single_release,
 238 };
 239
 240 static int __init rtllib_init(void)
 241 {
 242         struct proc_dir_entry *e;
 243
 244         rtllib_debug_level = debug;
 245         rtllib_proc = proc_mkdir(DRV_NAME, init_net.proc_net);
 246         if (rtllib_proc == NULL) {
 247                 RTLLIB_ERROR("Unable to create " DRV_NAME
 248                                 " proc directory\n");
 249                 return -EIO;
 250         }
 251         e = proc_create("debug_level", S_IRUGO | S_IWUSR, rtllib_proc, &fops);
 252         if (!e) {
 253                 remove_proc_entry(DRV_NAME, init_net.proc_net);
 254                 rtllib_proc = NULL;
 255                 return -EIO;
 256         }
 257         return 0;
 258 }
 259
 260 static void __exit rtllib_exit(void)
 261 {
 262         if (rtllib_proc) {
 263                 remove_proc_entry("debug_level", rtllib_proc);
 264                 remove_proc_entry(DRV_NAME, init_net.proc_net);
 265                 rtllib_proc = NULL;
 266         }
 267 }
 268
 269 module_init(rtllib_init);
 270 module_exit(rtllib_exit);
 271
 272 MODULE_LICENSE("GPL");