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b453872c JG |
1 | /******************************************************************************* |
2 | ||
ebeaddcc | 3 | Copyright(c) 2004-2005 Intel Corporation. All rights reserved. |
b453872c JG |
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 | |
85d32e7b JM |
8 | <j@w1.fi> |
9 | Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi> | |
b453872c JG |
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: | |
c1eb2c82 | 28 | Intel Linux Wireless <ilw@linux.intel.com> |
b453872c JG |
29 | Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
30 | ||
31 | *******************************************************************************/ | |
32 | ||
33 | #include <linux/compiler.h> | |
b453872c JG |
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> | |
b453872c JG |
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> | |
b453872c JG |
47 | #include <linux/wireless.h> |
48 | #include <linux/etherdevice.h> | |
7c0f6ba6 | 49 | #include <linux/uaccess.h> |
457c4cbc | 50 | #include <net/net_namespace.h> |
b453872c JG |
51 | #include <net/arp.h> |
52 | ||
b0a4e7d8 | 53 | #include "libipw.h" |
b453872c | 54 | |
31696160 | 55 | #define DRV_DESCRIPTION "802.11 data/management/control stack" |
27ae60f8 | 56 | #define DRV_NAME "libipw" |
151f52f0 | 57 | #define DRV_PROCNAME "ieee80211" |
b0a4e7d8 | 58 | #define DRV_VERSION LIBIPW_VERSION |
31696160 JK |
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); | |
b453872c JG |
64 | MODULE_LICENSE("GPL"); |
65 | ||
cc40cc56 JL |
66 | static struct cfg80211_ops libipw_config_ops = { }; |
67 | static void *libipw_wiphy_privid = &libipw_wiphy_privid; | |
a3caa99e | 68 | |
b0a4e7d8 | 69 | static int libipw_networks_allocate(struct libipw_device *ieee) |
b453872c | 70 | { |
8e59340e ZY |
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 | } | |
b453872c JG |
82 | } |
83 | ||
b453872c JG |
84 | return 0; |
85 | } | |
86 | ||
b0a4e7d8 | 87 | static inline void libipw_networks_free(struct libipw_device *ieee) |
b453872c | 88 | { |
15f38598 ZY |
89 | int i; |
90 | ||
2aa01652 | 91 | for (i = 0; i < MAX_NETWORK_COUNT; i++) |
8e59340e | 92 | kfree(ieee->networks[i]); |
b453872c JG |
93 | } |
94 | ||
b0a4e7d8 | 95 | void libipw_networks_age(struct libipw_device *ieee, |
c3d72b96 DW |
96 | unsigned long age_secs) |
97 | { | |
b0a4e7d8 | 98 | struct libipw_network *network = NULL; |
c3d72b96 DW |
99 | unsigned long flags; |
100 | unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC); | |
101 | ||
102 | spin_lock_irqsave(&ieee->lock, flags); | |
103 | list_for_each_entry(network, &ieee->network_list, list) { | |
104 | network->last_scanned -= age_jiffies; | |
105 | } | |
106 | spin_unlock_irqrestore(&ieee->lock, flags); | |
107 | } | |
b0a4e7d8 | 108 | EXPORT_SYMBOL(libipw_networks_age); |
c3d72b96 | 109 | |
b0a4e7d8 | 110 | static void libipw_networks_initialize(struct libipw_device *ieee) |
b453872c JG |
111 | { |
112 | int i; | |
113 | ||
114 | INIT_LIST_HEAD(&ieee->network_free_list); | |
115 | INIT_LIST_HEAD(&ieee->network_list); | |
116 | for (i = 0; i < MAX_NETWORK_COUNT; i++) | |
8e59340e | 117 | list_add_tail(&ieee->networks[i]->list, |
0edd5b44 | 118 | &ieee->network_free_list); |
b453872c JG |
119 | } |
120 | ||
27ae60f8 | 121 | struct net_device *alloc_libipw(int sizeof_priv, int monitor) |
b453872c | 122 | { |
b0a4e7d8 | 123 | struct libipw_device *ieee; |
b453872c JG |
124 | struct net_device *dev; |
125 | int err; | |
126 | ||
b0a4e7d8 | 127 | LIBIPW_DEBUG_INFO("Initializing...\n"); |
b453872c | 128 | |
b0a4e7d8 | 129 | dev = alloc_etherdev(sizeof(struct libipw_device) + sizeof_priv); |
41de8d4c | 130 | if (!dev) |
b453872c | 131 | goto failed; |
41de8d4c | 132 | |
b453872c | 133 | ieee = netdev_priv(dev); |
b453872c JG |
134 | |
135 | ieee->dev = dev; | |
136 | ||
a3caa99e JL |
137 | if (!monitor) { |
138 | ieee->wdev.wiphy = wiphy_new(&libipw_config_ops, 0); | |
139 | if (!ieee->wdev.wiphy) { | |
140 | LIBIPW_ERROR("Unable to allocate wiphy.\n"); | |
141 | goto failed_free_netdev; | |
142 | } | |
143 | ||
144 | ieee->dev->ieee80211_ptr = &ieee->wdev; | |
145 | ieee->wdev.iftype = NL80211_IFTYPE_STATION; | |
146 | ||
147 | /* Fill-out wiphy structure bits we know... Not enough info | |
148 | here to call set_wiphy_dev or set MAC address or channel info | |
149 | -- have to do that in ->ndo_init... */ | |
150 | ieee->wdev.wiphy->privid = libipw_wiphy_privid; | |
151 | ||
152 | ieee->wdev.wiphy->max_scan_ssids = 1; | |
153 | ieee->wdev.wiphy->max_scan_ie_len = 0; | |
154 | ieee->wdev.wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | |
155 | | BIT(NL80211_IFTYPE_ADHOC); | |
156 | } | |
157 | ||
b0a4e7d8 | 158 | err = libipw_networks_allocate(ieee); |
b453872c | 159 | if (err) { |
b0a4e7d8 | 160 | LIBIPW_ERROR("Unable to allocate beacon storage: %d\n", err); |
a3caa99e | 161 | goto failed_free_wiphy; |
b453872c | 162 | } |
b0a4e7d8 | 163 | libipw_networks_initialize(ieee); |
b453872c JG |
164 | |
165 | /* Default fragmentation threshold is maximum payload size */ | |
166 | ieee->fts = DEFAULT_FTS; | |
3cdd00c5 | 167 | ieee->rts = DEFAULT_FTS; |
b453872c JG |
168 | ieee->scan_age = DEFAULT_MAX_SCAN_AGE; |
169 | ieee->open_wep = 1; | |
170 | ||
171 | /* Default to enabling full open WEP with host based encrypt/decrypt */ | |
172 | ieee->host_encrypt = 1; | |
173 | ieee->host_decrypt = 1; | |
ccd0fda3 JK |
174 | ieee->host_mc_decrypt = 1; |
175 | ||
af901ca1 | 176 | /* Host fragmentation in Open mode. Default is enabled. |
1264fc04 JK |
177 | * Note: host fragmentation is always enabled if host encryption |
178 | * is enabled. For cards can do hardware encryption, they must do | |
179 | * hardware fragmentation as well. So we don't need a variable | |
180 | * like host_enc_frag. */ | |
181 | ieee->host_open_frag = 1; | |
0edd5b44 | 182 | ieee->ieee802_1x = 1; /* Default to supporting 802.1x */ |
b453872c | 183 | |
b453872c JG |
184 | spin_lock_init(&ieee->lock); |
185 | ||
2ba4b32e | 186 | lib80211_crypt_info_init(&ieee->crypt_info, dev->name, &ieee->lock); |
274bfb8d | 187 | |
0edd5b44 | 188 | ieee->wpa_enabled = 0; |
0edd5b44 JG |
189 | ieee->drop_unencrypted = 0; |
190 | ieee->privacy_invoked = 0; | |
b453872c JG |
191 | |
192 | return dev; | |
193 | ||
a3caa99e JL |
194 | failed_free_wiphy: |
195 | if (!monitor) | |
196 | wiphy_free(ieee->wdev.wiphy); | |
d92a8e81 JL |
197 | failed_free_netdev: |
198 | free_netdev(dev); | |
199 | failed: | |
b453872c JG |
200 | return NULL; |
201 | } | |
27ae60f8 | 202 | EXPORT_SYMBOL(alloc_libipw); |
b453872c | 203 | |
27ae60f8 | 204 | void free_libipw(struct net_device *dev, int monitor) |
b453872c | 205 | { |
b0a4e7d8 | 206 | struct libipw_device *ieee = netdev_priv(dev); |
b453872c | 207 | |
2ba4b32e | 208 | lib80211_crypt_info_free(&ieee->crypt_info); |
b453872c | 209 | |
b0a4e7d8 | 210 | libipw_networks_free(ieee); |
a3caa99e JL |
211 | |
212 | /* free cfg80211 resources */ | |
213 | if (!monitor) | |
214 | wiphy_free(ieee->wdev.wiphy); | |
215 | ||
b453872c JG |
216 | free_netdev(dev); |
217 | } | |
27ae60f8 | 218 | EXPORT_SYMBOL(free_libipw); |
b453872c | 219 | |
3756162b | 220 | #ifdef CONFIG_LIBIPW_DEBUG |
b453872c JG |
221 | |
222 | static int debug = 0; | |
b0a4e7d8 JL |
223 | u32 libipw_debug_level = 0; |
224 | EXPORT_SYMBOL_GPL(libipw_debug_level); | |
225 | static struct proc_dir_entry *libipw_proc = NULL; | |
b453872c | 226 | |
b8d83392 | 227 | static int debug_level_proc_show(struct seq_file *m, void *v) |
b453872c | 228 | { |
b8d83392 AD |
229 | seq_printf(m, "0x%08X\n", libipw_debug_level); |
230 | return 0; | |
b453872c JG |
231 | } |
232 | ||
b8d83392 AD |
233 | static int debug_level_proc_open(struct inode *inode, struct file *file) |
234 | { | |
235 | return single_open(file, debug_level_proc_show, NULL); | |
236 | } | |
237 | ||
238 | static ssize_t debug_level_proc_write(struct file *file, | |
239 | const char __user *buffer, size_t count, loff_t *pos) | |
b453872c | 240 | { |
262d8e46 | 241 | char buf[] = "0x00000000\n"; |
b8d83392 | 242 | size_t len = min(sizeof(buf) - 1, count); |
b453872c JG |
243 | unsigned long val; |
244 | ||
262d8e46 | 245 | if (copy_from_user(buf, buffer, len)) |
b453872c | 246 | return count; |
262d8e46 JK |
247 | buf[len] = 0; |
248 | if (sscanf(buf, "%li", &val) != 1) | |
b453872c JG |
249 | printk(KERN_INFO DRV_NAME |
250 | ": %s is not in hex or decimal form.\n", buf); | |
251 | else | |
b0a4e7d8 | 252 | libipw_debug_level = val; |
b453872c | 253 | |
262d8e46 | 254 | return strnlen(buf, len); |
b453872c | 255 | } |
b8d83392 AD |
256 | |
257 | static const struct file_operations debug_level_proc_fops = { | |
258 | .owner = THIS_MODULE, | |
259 | .open = debug_level_proc_open, | |
260 | .read = seq_read, | |
261 | .llseek = seq_lseek, | |
262 | .release = single_release, | |
263 | .write = debug_level_proc_write, | |
264 | }; | |
3756162b | 265 | #endif /* CONFIG_LIBIPW_DEBUG */ |
b453872c | 266 | |
b0a4e7d8 | 267 | static int __init libipw_init(void) |
b453872c | 268 | { |
3756162b | 269 | #ifdef CONFIG_LIBIPW_DEBUG |
b453872c JG |
270 | struct proc_dir_entry *e; |
271 | ||
b0a4e7d8 | 272 | libipw_debug_level = debug; |
151f52f0 | 273 | libipw_proc = proc_mkdir(DRV_PROCNAME, init_net.proc_net); |
b0a4e7d8 | 274 | if (libipw_proc == NULL) { |
151f52f0 | 275 | LIBIPW_ERROR("Unable to create " DRV_PROCNAME |
b453872c JG |
276 | " proc directory\n"); |
277 | return -EIO; | |
278 | } | |
b8d83392 AD |
279 | e = proc_create("debug_level", S_IRUGO | S_IWUSR, libipw_proc, |
280 | &debug_level_proc_fops); | |
b453872c | 281 | if (!e) { |
151f52f0 | 282 | remove_proc_entry(DRV_PROCNAME, init_net.proc_net); |
b0a4e7d8 | 283 | libipw_proc = NULL; |
b453872c JG |
284 | return -EIO; |
285 | } | |
3756162b | 286 | #endif /* CONFIG_LIBIPW_DEBUG */ |
31696160 JK |
287 | |
288 | printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n"); | |
289 | printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n"); | |
b453872c JG |
290 | |
291 | return 0; | |
292 | } | |
293 | ||
b0a4e7d8 | 294 | static void __exit libipw_exit(void) |
b453872c | 295 | { |
3756162b | 296 | #ifdef CONFIG_LIBIPW_DEBUG |
b0a4e7d8 JL |
297 | if (libipw_proc) { |
298 | remove_proc_entry("debug_level", libipw_proc); | |
151f52f0 | 299 | remove_proc_entry(DRV_PROCNAME, init_net.proc_net); |
b0a4e7d8 | 300 | libipw_proc = NULL; |
b453872c | 301 | } |
3756162b | 302 | #endif /* CONFIG_LIBIPW_DEBUG */ |
b453872c JG |
303 | } |
304 | ||
3756162b | 305 | #ifdef CONFIG_LIBIPW_DEBUG |
b453872c JG |
306 | #include <linux/moduleparam.h> |
307 | module_param(debug, int, 0444); | |
308 | MODULE_PARM_DESC(debug, "debug output mask"); | |
3756162b | 309 | #endif /* CONFIG_LIBIPW_DEBUG */ |
b453872c | 310 | |
b0a4e7d8 JL |
311 | module_exit(libipw_exit); |
312 | module_init(libipw_init); |