1 // SPDX-License-Identifier: GPL-2.0
2 /*******************************************************************************
3 *
4 * Copyright(c) 2004 Intel Corporation. All rights reserved.
5 *
6 * Portions of this file are based on the WEP enablement code provided by the
7 * Host AP project hostap-drivers v0.1.3
8 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
9 * <jkmaline@cc.hut.fi>
10 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but WITHOUT
17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
19 * more details.
20 *
21 * You should have received a copy of the GNU General Public License along with
22 * this program; if not, write to the Free Software Foundation, Inc., 59
23 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 *
25 * The full GNU General Public License is included in this distribution in the
26 * file called LICENSE.
27 *
28 * Contact Information:
29 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 *
32 ******************************************************************************/
33
34 #include <linux/compiler.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/wireless.h>
50 #include <linux/etherdevice.h>
51 #include <linux/uaccess.h>
52 #include <net/arp.h>
53
54 #include "ieee80211.h"
55
56 MODULE_DESCRIPTION("802.11 data/management/control stack");
57 MODULE_AUTHOR("Copyright (C) 2004 Intel Corporation <jketreno@linux.intel.com>");
58 MODULE_LICENSE("GPL");
59
60 #define DRV_NAME "ieee80211"
61
ieee80211_networks_allocate(struct ieee80211_device * ieee)62 static inline int ieee80211_networks_allocate(struct ieee80211_device *ieee)
63 {
64 if (ieee->networks)
65 return 0;
66
67 ieee->networks = kcalloc(MAX_NETWORK_COUNT,
68 sizeof(struct ieee80211_network),
69 GFP_KERNEL);
70 if (!ieee->networks) {
71 printk(KERN_WARNING "%s: Out of memory allocating beacons\n",
72 ieee->dev->name);
73 return -ENOMEM;
74 }
75
76 return 0;
77 }
78
ieee80211_networks_free(struct ieee80211_device * ieee)79 static inline void ieee80211_networks_free(struct ieee80211_device *ieee)
80 {
81 if (!ieee->networks)
82 return;
83 kfree(ieee->networks);
84 ieee->networks = NULL;
85 }
86
ieee80211_networks_initialize(struct ieee80211_device * ieee)87 static inline void ieee80211_networks_initialize(struct ieee80211_device *ieee)
88 {
89 int i;
90
91 INIT_LIST_HEAD(&ieee->network_free_list);
92 INIT_LIST_HEAD(&ieee->network_list);
93 for (i = 0; i < MAX_NETWORK_COUNT; i++)
94 list_add_tail(&ieee->networks[i].list, &ieee->network_free_list);
95 }
96
alloc_ieee80211(int sizeof_priv)97 struct net_device *alloc_ieee80211(int sizeof_priv)
98 {
99 struct ieee80211_device *ieee;
100 struct net_device *dev;
101 int i, err;
102
103 IEEE80211_DEBUG_INFO("Initializing...\n");
104
105 dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv);
106 if (!dev) {
107 IEEE80211_ERROR("Unable to network device.\n");
108 goto failed;
109 }
110
111 ieee = netdev_priv(dev);
112 ieee->dev = dev;
113
114 err = ieee80211_networks_allocate(ieee);
115 if (err) {
116 IEEE80211_ERROR("Unable to allocate beacon storage: %d\n",
117 err);
118 goto failed;
119 }
120 ieee80211_networks_initialize(ieee);
121
122 /* Default fragmentation threshold is maximum payload size */
123 ieee->fts = DEFAULT_FTS;
124 ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
125 ieee->open_wep = 1;
126
127 /* Default to enabling full open WEP with host based encrypt/decrypt */
128 ieee->host_encrypt = 1;
129 ieee->host_decrypt = 1;
130 ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
131
132 INIT_LIST_HEAD(&ieee->crypt_deinit_list);
133 timer_setup(&ieee->crypt_deinit_timer, ieee80211_crypt_deinit_handler,
134 0);
135
136 spin_lock_init(&ieee->lock);
137 spin_lock_init(&ieee->wpax_suitlist_lock);
138 spin_lock_init(&ieee->bw_spinlock);
139 spin_lock_init(&ieee->reorder_spinlock);
140 /* added by WB */
141 atomic_set(&ieee->atm_chnlop, 0);
142 atomic_set(&ieee->atm_swbw, 0);
143
144 ieee->wpax_type_set = 0;
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 ieee->raw_tx = 0;
151 //ieee->hwsec_support = 1; //defalt support hw security. //use module_param instead.
152 ieee->hwsec_active = 0; /* disable hwsec, switch it on when necessary. */
153
154 ieee80211_softmac_init(ieee);
155
156 ieee->pHTInfo = kzalloc(sizeof(RT_HIGH_THROUGHPUT), GFP_KERNEL);
157 if (!ieee->pHTInfo) {
158 IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't alloc memory for HTInfo\n");
159
160 /* By this point in code ieee80211_networks_allocate() has been
161 * successfully called so the memory allocated should be freed
162 */
163 ieee80211_networks_free(ieee);
164 goto failed;
165 }
166 HTUpdateDefaultSetting(ieee);
167 HTInitializeHTInfo(ieee); /* may move to other place. */
168 TSInitialize(ieee);
169
170 for (i = 0; i < IEEE_IBSS_MAC_HASH_SIZE; i++)
171 INIT_LIST_HEAD(&ieee->ibss_mac_hash[i]);
172
173 for (i = 0; i < 17; i++) {
174 ieee->last_rxseq_num[i] = -1;
175 ieee->last_rxfrag_num[i] = -1;
176 ieee->last_packet_time[i] = 0;
177 }
178
179 /* These function were added to load crypte module autoly */
180 ieee80211_tkip_null();
181
182 return dev;
183
184 failed:
185 if (dev)
186 free_netdev(dev);
187
188 return NULL;
189 }
190
free_ieee80211(struct net_device * dev)191 void free_ieee80211(struct net_device *dev)
192 {
193 struct ieee80211_device *ieee = netdev_priv(dev);
194 int i;
195 /* struct list_head *p, *q; */
196 // del_timer_sync(&ieee->SwBwTimer);
197 kfree(ieee->pHTInfo);
198 ieee->pHTInfo = NULL;
199 RemoveAllTS(ieee);
200 ieee80211_softmac_free(ieee);
201 del_timer_sync(&ieee->crypt_deinit_timer);
202 ieee80211_crypt_deinit_entries(ieee, 1);
203
204 for (i = 0; i < WEP_KEYS; i++) {
205 struct ieee80211_crypt_data *crypt = ieee->crypt[i];
206
207 if (crypt) {
208 if (crypt->ops)
209 crypt->ops->deinit(crypt->priv);
210 kfree(crypt);
211 ieee->crypt[i] = NULL;
212 }
213 }
214
215 ieee80211_networks_free(ieee);
216 free_netdev(dev);
217 }
218
219 #ifdef CONFIG_IEEE80211_DEBUG
220
221 u32 ieee80211_debug_level;
222 static int debug = // IEEE80211_DL_INFO |
223 // IEEE80211_DL_WX |
224 // IEEE80211_DL_SCAN |
225 // IEEE80211_DL_STATE |
226 // IEEE80211_DL_MGMT |
227 // IEEE80211_DL_FRAG |
228 // IEEE80211_DL_EAP |
229 // IEEE80211_DL_DROP |
230 // IEEE80211_DL_TX |
231 // IEEE80211_DL_RX |
232 //IEEE80211_DL_QOS |
233 // IEEE80211_DL_HT |
234 // IEEE80211_DL_TS |
235 // IEEE80211_DL_BA |
236 // IEEE80211_DL_REORDER|
237 // IEEE80211_DL_TRACE |
238 //IEEE80211_DL_DATA |
239 IEEE80211_DL_ERR /* awayls open this flags to show error out */
240 ;
241 static struct proc_dir_entry *ieee80211_proc;
242
show_debug_level(struct seq_file * m,void * v)243 static int show_debug_level(struct seq_file *m, void *v)
244 {
245 seq_printf(m, "0x%08X\n", ieee80211_debug_level);
246
247 return 0;
248 }
249
write_debug_level(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)250 static ssize_t write_debug_level(struct file *file, const char __user *buffer,
251 size_t count, loff_t *ppos)
252 {
253 unsigned long val;
254 int err = kstrtoul_from_user(buffer, count, 0, &val);
255
256 if (err)
257 return err;
258 ieee80211_debug_level = val;
259 return count;
260 }
261
open_debug_level(struct inode * inode,struct file * file)262 static int open_debug_level(struct inode *inode, struct file *file)
263 {
264 return single_open(file, show_debug_level, NULL);
265 }
266
267 static const struct file_operations fops = {
268 .open = open_debug_level,
269 .read = seq_read,
270 .llseek = seq_lseek,
271 .write = write_debug_level,
272 .release = single_release,
273 };
274
ieee80211_debug_init(void)275 int __init ieee80211_debug_init(void)
276 {
277 struct proc_dir_entry *e;
278
279 ieee80211_debug_level = debug;
280
281 ieee80211_proc = proc_mkdir(DRV_NAME, init_net.proc_net);
282 if (!ieee80211_proc) {
283 IEEE80211_ERROR("Unable to create " DRV_NAME
284 " proc directory\n");
285 return -EIO;
286 }
287 e = proc_create("debug_level", 0644, ieee80211_proc, &fops);
288 if (!e) {
289 remove_proc_entry(DRV_NAME, init_net.proc_net);
290 ieee80211_proc = NULL;
291 return -EIO;
292 }
293 return 0;
294 }
295
ieee80211_debug_exit(void)296 void __exit ieee80211_debug_exit(void)
297 {
298 if (ieee80211_proc) {
299 remove_proc_entry("debug_level", ieee80211_proc);
300 remove_proc_entry(DRV_NAME, init_net.proc_net);
301 ieee80211_proc = NULL;
302 }
303 }
304
305 module_param(debug, int, 0444);
306 MODULE_PARM_DESC(debug, "debug output mask");
307 #endif
308
