| 1 | /******************************************************************************* |
| 2 | |
| 3 | Copyright(c) 2004-2005 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 | <j@w1.fi> |
| 9 | Copyright (c) 2002-2003, Jouni Malinen <j@w1.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 | Intel Linux Wireless <ilw@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/proc_fs.h> |
| 43 | #include <linux/skbuff.h> |
| 44 | #include <linux/slab.h> |
| 45 | #include <linux/tcp.h> |
| 46 | #include <linux/types.h> |
| 47 | #include <linux/wireless.h> |
| 48 | #include <linux/etherdevice.h> |
| 49 | #include <asm/uaccess.h> |
| 50 | #include <net/net_namespace.h> |
| 51 | #include <net/arp.h> |
| 52 | |
| 53 | #include "libipw.h" |
| 54 | |
| 55 | #define DRV_DESCRIPTION "802.11 data/management/control stack" |
| 56 | #define DRV_NAME "libipw" |
| 57 | #define DRV_PROCNAME "ieee80211" |
| 58 | #define DRV_VERSION LIBIPW_VERSION |
| 59 | #define DRV_COPYRIGHT "Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>" |
| 60 | |
| 61 | MODULE_VERSION(DRV_VERSION); |
| 62 | MODULE_DESCRIPTION(DRV_DESCRIPTION); |
| 63 | MODULE_AUTHOR(DRV_COPYRIGHT); |
| 64 | MODULE_LICENSE("GPL"); |
| 65 | |
| 66 | static struct cfg80211_ops libipw_config_ops = { }; |
| 67 | static void *libipw_wiphy_privid = &libipw_wiphy_privid; |
| 68 | |
| 69 | static int libipw_networks_allocate(struct libipw_device *ieee) |
| 70 | { |
| 71 | int i, j; |
| 72 | |
| 73 | for (i = 0; i < MAX_NETWORK_COUNT; i++) { |
| 74 | ieee->networks[i] = kzalloc(sizeof(struct libipw_network), |
| 75 | GFP_KERNEL); |
| 76 | if (!ieee->networks[i]) { |
| 77 | LIBIPW_ERROR("Out of memory allocating beacons\n"); |
| 78 | for (j = 0; j < i; j++) |
| 79 | kfree(ieee->networks[j]); |
| 80 | return -ENOMEM; |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | return 0; |
| 85 | } |
| 86 | |
| 87 | void libipw_network_reset(struct libipw_network *network) |
| 88 | { |
| 89 | if (!network) |
| 90 | return; |
| 91 | |
| 92 | if (network->ibss_dfs) { |
| 93 | kfree(network->ibss_dfs); |
| 94 | network->ibss_dfs = NULL; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | static inline void libipw_networks_free(struct libipw_device *ieee) |
| 99 | { |
| 100 | int i; |
| 101 | |
| 102 | for (i = 0; i < MAX_NETWORK_COUNT; i++) { |
| 103 | if (ieee->networks[i]->ibss_dfs) |
| 104 | kfree(ieee->networks[i]->ibss_dfs); |
| 105 | kfree(ieee->networks[i]); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | void libipw_networks_age(struct libipw_device *ieee, |
| 110 | unsigned long age_secs) |
| 111 | { |
| 112 | struct libipw_network *network = NULL; |
| 113 | unsigned long flags; |
| 114 | unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC); |
| 115 | |
| 116 | spin_lock_irqsave(&ieee->lock, flags); |
| 117 | list_for_each_entry(network, &ieee->network_list, list) { |
| 118 | network->last_scanned -= age_jiffies; |
| 119 | } |
| 120 | spin_unlock_irqrestore(&ieee->lock, flags); |
| 121 | } |
| 122 | EXPORT_SYMBOL(libipw_networks_age); |
| 123 | |
| 124 | static void libipw_networks_initialize(struct libipw_device *ieee) |
| 125 | { |
| 126 | int i; |
| 127 | |
| 128 | INIT_LIST_HEAD(&ieee->network_free_list); |
| 129 | INIT_LIST_HEAD(&ieee->network_list); |
| 130 | for (i = 0; i < MAX_NETWORK_COUNT; i++) |
| 131 | list_add_tail(&ieee->networks[i]->list, |
| 132 | &ieee->network_free_list); |
| 133 | } |
| 134 | |
| 135 | int libipw_change_mtu(struct net_device *dev, int new_mtu) |
| 136 | { |
| 137 | if ((new_mtu < 68) || (new_mtu > LIBIPW_DATA_LEN)) |
| 138 | return -EINVAL; |
| 139 | dev->mtu = new_mtu; |
| 140 | return 0; |
| 141 | } |
| 142 | EXPORT_SYMBOL(libipw_change_mtu); |
| 143 | |
| 144 | struct net_device *alloc_libipw(int sizeof_priv, int monitor) |
| 145 | { |
| 146 | struct libipw_device *ieee; |
| 147 | struct net_device *dev; |
| 148 | int err; |
| 149 | |
| 150 | LIBIPW_DEBUG_INFO("Initializing...\n"); |
| 151 | |
| 152 | dev = alloc_etherdev(sizeof(struct libipw_device) + sizeof_priv); |
| 153 | if (!dev) |
| 154 | goto failed; |
| 155 | |
| 156 | ieee = netdev_priv(dev); |
| 157 | |
| 158 | ieee->dev = dev; |
| 159 | |
| 160 | if (!monitor) { |
| 161 | ieee->wdev.wiphy = wiphy_new(&libipw_config_ops, 0); |
| 162 | if (!ieee->wdev.wiphy) { |
| 163 | LIBIPW_ERROR("Unable to allocate wiphy.\n"); |
| 164 | goto failed_free_netdev; |
| 165 | } |
| 166 | |
| 167 | ieee->dev->ieee80211_ptr = &ieee->wdev; |
| 168 | ieee->wdev.iftype = NL80211_IFTYPE_STATION; |
| 169 | |
| 170 | /* Fill-out wiphy structure bits we know... Not enough info |
| 171 | here to call set_wiphy_dev or set MAC address or channel info |
| 172 | -- have to do that in ->ndo_init... */ |
| 173 | ieee->wdev.wiphy->privid = libipw_wiphy_privid; |
| 174 | |
| 175 | ieee->wdev.wiphy->max_scan_ssids = 1; |
| 176 | ieee->wdev.wiphy->max_scan_ie_len = 0; |
| 177 | ieee->wdev.wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
| 178 | | BIT(NL80211_IFTYPE_ADHOC); |
| 179 | } |
| 180 | |
| 181 | err = libipw_networks_allocate(ieee); |
| 182 | if (err) { |
| 183 | LIBIPW_ERROR("Unable to allocate beacon storage: %d\n", err); |
| 184 | goto failed_free_wiphy; |
| 185 | } |
| 186 | libipw_networks_initialize(ieee); |
| 187 | |
| 188 | /* Default fragmentation threshold is maximum payload size */ |
| 189 | ieee->fts = DEFAULT_FTS; |
| 190 | ieee->rts = DEFAULT_FTS; |
| 191 | ieee->scan_age = DEFAULT_MAX_SCAN_AGE; |
| 192 | ieee->open_wep = 1; |
| 193 | |
| 194 | /* Default to enabling full open WEP with host based encrypt/decrypt */ |
| 195 | ieee->host_encrypt = 1; |
| 196 | ieee->host_decrypt = 1; |
| 197 | ieee->host_mc_decrypt = 1; |
| 198 | |
| 199 | /* Host fragmentation in Open mode. Default is enabled. |
| 200 | * Note: host fragmentation is always enabled if host encryption |
| 201 | * is enabled. For cards can do hardware encryption, they must do |
| 202 | * hardware fragmentation as well. So we don't need a variable |
| 203 | * like host_enc_frag. */ |
| 204 | ieee->host_open_frag = 1; |
| 205 | ieee->ieee802_1x = 1; /* Default to supporting 802.1x */ |
| 206 | |
| 207 | spin_lock_init(&ieee->lock); |
| 208 | |
| 209 | lib80211_crypt_info_init(&ieee->crypt_info, dev->name, &ieee->lock); |
| 210 | |
| 211 | ieee->wpa_enabled = 0; |
| 212 | ieee->drop_unencrypted = 0; |
| 213 | ieee->privacy_invoked = 0; |
| 214 | |
| 215 | return dev; |
| 216 | |
| 217 | failed_free_wiphy: |
| 218 | if (!monitor) |
| 219 | wiphy_free(ieee->wdev.wiphy); |
| 220 | failed_free_netdev: |
| 221 | free_netdev(dev); |
| 222 | failed: |
| 223 | return NULL; |
| 224 | } |
| 225 | EXPORT_SYMBOL(alloc_libipw); |
| 226 | |
| 227 | void free_libipw(struct net_device *dev, int monitor) |
| 228 | { |
| 229 | struct libipw_device *ieee = netdev_priv(dev); |
| 230 | |
| 231 | lib80211_crypt_info_free(&ieee->crypt_info); |
| 232 | |
| 233 | libipw_networks_free(ieee); |
| 234 | |
| 235 | /* free cfg80211 resources */ |
| 236 | if (!monitor) |
| 237 | wiphy_free(ieee->wdev.wiphy); |
| 238 | |
| 239 | free_netdev(dev); |
| 240 | } |
| 241 | EXPORT_SYMBOL(free_libipw); |
| 242 | |
| 243 | #ifdef CONFIG_LIBIPW_DEBUG |
| 244 | |
| 245 | static int debug = 0; |
| 246 | u32 libipw_debug_level = 0; |
| 247 | EXPORT_SYMBOL_GPL(libipw_debug_level); |
| 248 | static struct proc_dir_entry *libipw_proc = NULL; |
| 249 | |
| 250 | static int debug_level_proc_show(struct seq_file *m, void *v) |
| 251 | { |
| 252 | seq_printf(m, "0x%08X\n", libipw_debug_level); |
| 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | static int debug_level_proc_open(struct inode *inode, struct file *file) |
| 257 | { |
| 258 | return single_open(file, debug_level_proc_show, NULL); |
| 259 | } |
| 260 | |
| 261 | static ssize_t debug_level_proc_write(struct file *file, |
| 262 | const char __user *buffer, size_t count, loff_t *pos) |
| 263 | { |
| 264 | char buf[] = "0x00000000\n"; |
| 265 | size_t len = min(sizeof(buf) - 1, count); |
| 266 | unsigned long val; |
| 267 | |
| 268 | if (copy_from_user(buf, buffer, len)) |
| 269 | return count; |
| 270 | buf[len] = 0; |
| 271 | if (sscanf(buf, "%li", &val) != 1) |
| 272 | printk(KERN_INFO DRV_NAME |
| 273 | ": %s is not in hex or decimal form.\n", buf); |
| 274 | else |
| 275 | libipw_debug_level = val; |
| 276 | |
| 277 | return strnlen(buf, len); |
| 278 | } |
| 279 | |
| 280 | static const struct file_operations debug_level_proc_fops = { |
| 281 | .owner = THIS_MODULE, |
| 282 | .open = debug_level_proc_open, |
| 283 | .read = seq_read, |
| 284 | .llseek = seq_lseek, |
| 285 | .release = single_release, |
| 286 | .write = debug_level_proc_write, |
| 287 | }; |
| 288 | #endif /* CONFIG_LIBIPW_DEBUG */ |
| 289 | |
| 290 | static int __init libipw_init(void) |
| 291 | { |
| 292 | #ifdef CONFIG_LIBIPW_DEBUG |
| 293 | struct proc_dir_entry *e; |
| 294 | |
| 295 | libipw_debug_level = debug; |
| 296 | libipw_proc = proc_mkdir(DRV_PROCNAME, init_net.proc_net); |
| 297 | if (libipw_proc == NULL) { |
| 298 | LIBIPW_ERROR("Unable to create " DRV_PROCNAME |
| 299 | " proc directory\n"); |
| 300 | return -EIO; |
| 301 | } |
| 302 | e = proc_create("debug_level", S_IRUGO | S_IWUSR, libipw_proc, |
| 303 | &debug_level_proc_fops); |
| 304 | if (!e) { |
| 305 | remove_proc_entry(DRV_PROCNAME, init_net.proc_net); |
| 306 | libipw_proc = NULL; |
| 307 | return -EIO; |
| 308 | } |
| 309 | #endif /* CONFIG_LIBIPW_DEBUG */ |
| 310 | |
| 311 | printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n"); |
| 312 | printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n"); |
| 313 | |
| 314 | return 0; |
| 315 | } |
| 316 | |
| 317 | static void __exit libipw_exit(void) |
| 318 | { |
| 319 | #ifdef CONFIG_LIBIPW_DEBUG |
| 320 | if (libipw_proc) { |
| 321 | remove_proc_entry("debug_level", libipw_proc); |
| 322 | remove_proc_entry(DRV_PROCNAME, init_net.proc_net); |
| 323 | libipw_proc = NULL; |
| 324 | } |
| 325 | #endif /* CONFIG_LIBIPW_DEBUG */ |
| 326 | } |
| 327 | |
| 328 | #ifdef CONFIG_LIBIPW_DEBUG |
| 329 | #include <linux/moduleparam.h> |
| 330 | module_param(debug, int, 0444); |
| 331 | MODULE_PARM_DESC(debug, "debug output mask"); |
| 332 | #endif /* CONFIG_LIBIPW_DEBUG */ |
| 333 | |
| 334 | module_exit(libipw_exit); |
| 335 | module_init(libipw_init); |