Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | |
James Ketrenos | ebeaddc | 2005-09-21 11:58:43 -0500 | [diff] [blame] | 3 | Copyright(c) 2004-2005 Intel Corporation. All rights reserved. |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 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> |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 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> |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 48 | #include <linux/wireless.h> |
| 49 | #include <linux/etherdevice.h> |
| 50 | #include <asm/uaccess.h> |
| 51 | #include <net/arp.h> |
| 52 | |
| 53 | #include <net/ieee80211.h> |
| 54 | |
James Ketrenos | 3169616 | 2005-09-21 11:58:46 -0500 | [diff] [blame] | 55 | #define DRV_DESCRIPTION "802.11 data/management/control stack" |
| 56 | #define DRV_NAME "ieee80211" |
| 57 | #define DRV_VERSION IEEE80211_VERSION |
| 58 | #define DRV_COPYRIGHT "Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>" |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 59 | |
James Ketrenos | 3169616 | 2005-09-21 11:58:46 -0500 | [diff] [blame] | 60 | MODULE_VERSION(DRV_VERSION); |
| 61 | MODULE_DESCRIPTION(DRV_DESCRIPTION); |
| 62 | MODULE_AUTHOR(DRV_COPYRIGHT); |
| 63 | MODULE_LICENSE("GPL"); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 64 | |
| 65 | static inline int ieee80211_networks_allocate(struct ieee80211_device *ieee) |
| 66 | { |
| 67 | if (ieee->networks) |
| 68 | return 0; |
| 69 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 70 | ieee->networks = |
| 71 | kmalloc(MAX_NETWORK_COUNT * sizeof(struct ieee80211_network), |
| 72 | GFP_KERNEL); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 73 | if (!ieee->networks) { |
| 74 | printk(KERN_WARNING "%s: Out of memory allocating beacons\n", |
| 75 | ieee->dev->name); |
| 76 | return -ENOMEM; |
| 77 | } |
| 78 | |
| 79 | memset(ieee->networks, 0, |
| 80 | MAX_NETWORK_COUNT * sizeof(struct ieee80211_network)); |
| 81 | |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | static inline void ieee80211_networks_free(struct ieee80211_device *ieee) |
| 86 | { |
| 87 | if (!ieee->networks) |
| 88 | return; |
| 89 | kfree(ieee->networks); |
| 90 | ieee->networks = NULL; |
| 91 | } |
| 92 | |
| 93 | static inline void ieee80211_networks_initialize(struct ieee80211_device *ieee) |
| 94 | { |
| 95 | int i; |
| 96 | |
| 97 | INIT_LIST_HEAD(&ieee->network_free_list); |
| 98 | INIT_LIST_HEAD(&ieee->network_list); |
| 99 | for (i = 0; i < MAX_NETWORK_COUNT; i++) |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 100 | list_add_tail(&ieee->networks[i].list, |
| 101 | &ieee->network_free_list); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 102 | } |
| 103 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 104 | struct net_device *alloc_ieee80211(int sizeof_priv) |
| 105 | { |
| 106 | struct ieee80211_device *ieee; |
| 107 | struct net_device *dev; |
| 108 | int err; |
| 109 | |
| 110 | IEEE80211_DEBUG_INFO("Initializing...\n"); |
| 111 | |
| 112 | dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv); |
| 113 | if (!dev) { |
| 114 | IEEE80211_ERROR("Unable to network device.\n"); |
| 115 | goto failed; |
| 116 | } |
| 117 | ieee = netdev_priv(dev); |
| 118 | dev->hard_start_xmit = ieee80211_xmit; |
| 119 | |
| 120 | ieee->dev = dev; |
| 121 | |
| 122 | err = ieee80211_networks_allocate(ieee); |
| 123 | if (err) { |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 124 | IEEE80211_ERROR("Unable to allocate beacon storage: %d\n", err); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 125 | goto failed; |
| 126 | } |
| 127 | ieee80211_networks_initialize(ieee); |
| 128 | |
| 129 | /* Default fragmentation threshold is maximum payload size */ |
| 130 | ieee->fts = DEFAULT_FTS; |
James Ketrenos | 3cdd00c | 2005-09-21 11:54:43 -0500 | [diff] [blame] | 131 | ieee->rts = DEFAULT_FTS; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 132 | ieee->scan_age = DEFAULT_MAX_SCAN_AGE; |
| 133 | ieee->open_wep = 1; |
| 134 | |
| 135 | /* Default to enabling full open WEP with host based encrypt/decrypt */ |
| 136 | ieee->host_encrypt = 1; |
| 137 | ieee->host_decrypt = 1; |
James Ketrenos | ccd0fda | 2005-09-21 11:58:32 -0500 | [diff] [blame] | 138 | ieee->host_mc_decrypt = 1; |
| 139 | |
James Ketrenos | 1264fc0 | 2005-09-21 11:54:53 -0500 | [diff] [blame] | 140 | /* Host fragementation in Open mode. Default is enabled. |
| 141 | * Note: host fragmentation is always enabled if host encryption |
| 142 | * is enabled. For cards can do hardware encryption, they must do |
| 143 | * hardware fragmentation as well. So we don't need a variable |
| 144 | * like host_enc_frag. */ |
| 145 | ieee->host_open_frag = 1; |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 146 | ieee->ieee802_1x = 1; /* Default to supporting 802.1x */ |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 147 | |
| 148 | INIT_LIST_HEAD(&ieee->crypt_deinit_list); |
| 149 | init_timer(&ieee->crypt_deinit_timer); |
| 150 | ieee->crypt_deinit_timer.data = (unsigned long)ieee; |
| 151 | ieee->crypt_deinit_timer.function = ieee80211_crypt_deinit_handler; |
James Ketrenos | 0ad0c3c | 2005-09-21 11:54:15 -0500 | [diff] [blame] | 152 | ieee->crypt_quiesced = 0; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 153 | |
| 154 | spin_lock_init(&ieee->lock); |
| 155 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 156 | ieee->wpa_enabled = 0; |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 157 | ieee->drop_unencrypted = 0; |
| 158 | ieee->privacy_invoked = 0; |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 159 | |
| 160 | return dev; |
| 161 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 162 | failed: |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 163 | if (dev) |
| 164 | free_netdev(dev); |
| 165 | return NULL; |
| 166 | } |
| 167 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 168 | void free_ieee80211(struct net_device *dev) |
| 169 | { |
| 170 | struct ieee80211_device *ieee = netdev_priv(dev); |
| 171 | |
| 172 | int i; |
| 173 | |
James Ketrenos | 0ad0c3c | 2005-09-21 11:54:15 -0500 | [diff] [blame] | 174 | ieee80211_crypt_quiescing(ieee); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 175 | del_timer_sync(&ieee->crypt_deinit_timer); |
| 176 | ieee80211_crypt_deinit_entries(ieee, 1); |
| 177 | |
| 178 | for (i = 0; i < WEP_KEYS; i++) { |
| 179 | struct ieee80211_crypt_data *crypt = ieee->crypt[i]; |
| 180 | if (crypt) { |
| 181 | if (crypt->ops) { |
| 182 | crypt->ops->deinit(crypt->priv); |
| 183 | module_put(crypt->ops->owner); |
| 184 | } |
| 185 | kfree(crypt); |
| 186 | ieee->crypt[i] = NULL; |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | ieee80211_networks_free(ieee); |
| 191 | free_netdev(dev); |
| 192 | } |
| 193 | |
| 194 | #ifdef CONFIG_IEEE80211_DEBUG |
| 195 | |
| 196 | static int debug = 0; |
| 197 | u32 ieee80211_debug_level = 0; |
| 198 | struct proc_dir_entry *ieee80211_proc = NULL; |
| 199 | |
| 200 | static int show_debug_level(char *page, char **start, off_t offset, |
| 201 | int count, int *eof, void *data) |
| 202 | { |
| 203 | return snprintf(page, count, "0x%08X\n", ieee80211_debug_level); |
| 204 | } |
| 205 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 206 | static int store_debug_level(struct file *file, const char __user * buffer, |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 207 | unsigned long count, void *data) |
| 208 | { |
James Ketrenos | 262d8e4 | 2005-09-13 17:42:53 -0500 | [diff] [blame] | 209 | char buf[] = "0x00000000\n"; |
| 210 | unsigned long len = min((unsigned long)sizeof(buf) - 1, count); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 211 | unsigned long val; |
| 212 | |
James Ketrenos | 262d8e4 | 2005-09-13 17:42:53 -0500 | [diff] [blame] | 213 | if (copy_from_user(buf, buffer, len)) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 214 | return count; |
James Ketrenos | 262d8e4 | 2005-09-13 17:42:53 -0500 | [diff] [blame] | 215 | buf[len] = 0; |
| 216 | if (sscanf(buf, "%li", &val) != 1) |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 217 | printk(KERN_INFO DRV_NAME |
| 218 | ": %s is not in hex or decimal form.\n", buf); |
| 219 | else |
| 220 | ieee80211_debug_level = val; |
| 221 | |
James Ketrenos | 262d8e4 | 2005-09-13 17:42:53 -0500 | [diff] [blame] | 222 | return strnlen(buf, len); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 223 | } |
James Ketrenos | 3169616 | 2005-09-21 11:58:46 -0500 | [diff] [blame] | 224 | #endif /* CONFIG_IEEE80211_DEBUG */ |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 225 | |
| 226 | static int __init ieee80211_init(void) |
| 227 | { |
James Ketrenos | 3169616 | 2005-09-21 11:58:46 -0500 | [diff] [blame] | 228 | #ifdef CONFIG_IEEE80211_DEBUG |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 229 | struct proc_dir_entry *e; |
| 230 | |
| 231 | ieee80211_debug_level = debug; |
Al Viro | 6660022 | 2005-09-28 22:32:57 +0100 | [diff] [blame] | 232 | ieee80211_proc = proc_mkdir(DRV_NAME, proc_net); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 233 | if (ieee80211_proc == NULL) { |
| 234 | IEEE80211_ERROR("Unable to create " DRV_NAME |
| 235 | " proc directory\n"); |
| 236 | return -EIO; |
| 237 | } |
| 238 | e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR, |
| 239 | ieee80211_proc); |
| 240 | if (!e) { |
| 241 | remove_proc_entry(DRV_NAME, proc_net); |
| 242 | ieee80211_proc = NULL; |
| 243 | return -EIO; |
| 244 | } |
| 245 | e->read_proc = show_debug_level; |
| 246 | e->write_proc = store_debug_level; |
| 247 | e->data = NULL; |
James Ketrenos | 3169616 | 2005-09-21 11:58:46 -0500 | [diff] [blame] | 248 | #endif /* CONFIG_IEEE80211_DEBUG */ |
| 249 | |
| 250 | printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n"); |
| 251 | printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n"); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 252 | |
| 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | static void __exit ieee80211_exit(void) |
| 257 | { |
James Ketrenos | 3169616 | 2005-09-21 11:58:46 -0500 | [diff] [blame] | 258 | #ifdef CONFIG_IEEE80211_DEBUG |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 259 | if (ieee80211_proc) { |
| 260 | remove_proc_entry("debug_level", ieee80211_proc); |
| 261 | remove_proc_entry(DRV_NAME, proc_net); |
| 262 | ieee80211_proc = NULL; |
| 263 | } |
James Ketrenos | 3169616 | 2005-09-21 11:58:46 -0500 | [diff] [blame] | 264 | #endif /* CONFIG_IEEE80211_DEBUG */ |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 265 | } |
| 266 | |
James Ketrenos | 3169616 | 2005-09-21 11:58:46 -0500 | [diff] [blame] | 267 | #ifdef CONFIG_IEEE80211_DEBUG |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 268 | #include <linux/moduleparam.h> |
| 269 | module_param(debug, int, 0444); |
| 270 | MODULE_PARM_DESC(debug, "debug output mask"); |
James Ketrenos | 3169616 | 2005-09-21 11:58:46 -0500 | [diff] [blame] | 271 | #endif /* CONFIG_IEEE80211_DEBUG */ |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 272 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 273 | module_exit(ieee80211_exit); |
| 274 | module_init(ieee80211_init); |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 275 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 276 | const char *escape_essid(const char *essid, u8 essid_len) |
| 277 | { |
Jiri Benc | e88187e | 2005-08-25 20:00:53 -0400 | [diff] [blame] | 278 | static char escaped[IW_ESSID_MAX_SIZE * 2 + 1]; |
| 279 | const char *s = essid; |
| 280 | char *d = escaped; |
| 281 | |
| 282 | if (ieee80211_is_empty_essid(essid, essid_len)) { |
| 283 | memcpy(escaped, "<hidden>", sizeof("<hidden>")); |
| 284 | return escaped; |
| 285 | } |
| 286 | |
Jeff Garzik | 0edd5b4 | 2005-09-07 00:48:31 -0400 | [diff] [blame] | 287 | essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE); |
Jiri Benc | e88187e | 2005-08-25 20:00:53 -0400 | [diff] [blame] | 288 | while (essid_len--) { |
| 289 | if (*s == '\0') { |
| 290 | *d++ = '\\'; |
| 291 | *d++ = '0'; |
| 292 | s++; |
| 293 | } else { |
| 294 | *d++ = *s++; |
| 295 | } |
| 296 | } |
| 297 | *d = '\0'; |
| 298 | return escaped; |
| 299 | } |
| 300 | |
Jeff Garzik | b453872 | 2005-05-12 22:48:20 -0400 | [diff] [blame] | 301 | EXPORT_SYMBOL(alloc_ieee80211); |
| 302 | EXPORT_SYMBOL(free_ieee80211); |
Jiri Benc | e88187e | 2005-08-25 20:00:53 -0400 | [diff] [blame] | 303 | EXPORT_SYMBOL(escape_essid); |