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 * Contact Information:
13 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
14 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
15 *
16 ******************************************************************************/
17
18 #include <linux/compiler.h>
19 #include <linux/errno.h>
20 #include <linux/if_arp.h>
21 #include <linux/in6.h>
22 #include <linux/in.h>
23 #include <linux/ip.h>
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/netdevice.h>
27 #include <linux/pci.h>
28 #include <linux/proc_fs.h>
29 #include <linux/skbuff.h>
30 #include <linux/slab.h>
31 #include <linux/tcp.h>
32 #include <linux/types.h>
33 #include <linux/wireless.h>
34 #include <linux/etherdevice.h>
35 #include <linux/uaccess.h>
36 #include <net/arp.h>
37
38 #include "ieee80211.h"
39
40 MODULE_DESCRIPTION("802.11 data/management/control stack");
41 MODULE_AUTHOR("Copyright (C) 2004 Intel Corporation <jketreno@linux.intel.com>");
42 MODULE_LICENSE("GPL");
43
44 #define DRV_NAME "ieee80211"
45
ieee80211_networks_allocate(struct ieee80211_device * ieee)46 static inline int ieee80211_networks_allocate(struct ieee80211_device *ieee)
47 {
48 if (ieee->networks)
49 return 0;
50
51 ieee->networks = kcalloc(MAX_NETWORK_COUNT,
52 sizeof(struct ieee80211_network),
53 GFP_KERNEL);
54 if (!ieee->networks) {
55 netdev_warn(ieee->dev, "Out of memory allocating beacons\n");
56 return -ENOMEM;
57 }
58
59 return 0;
60 }
61
ieee80211_networks_free(struct ieee80211_device * ieee)62 static inline void ieee80211_networks_free(struct ieee80211_device *ieee)
63 {
64 if (!ieee->networks)
65 return;
66 kfree(ieee->networks);
67 ieee->networks = NULL;
68 }
69
ieee80211_networks_initialize(struct ieee80211_device * ieee)70 static inline void ieee80211_networks_initialize(struct ieee80211_device *ieee)
71 {
72 int i;
73
74 INIT_LIST_HEAD(&ieee->network_free_list);
75 INIT_LIST_HEAD(&ieee->network_list);
76 for (i = 0; i < MAX_NETWORK_COUNT; i++)
77 list_add_tail(&ieee->networks[i].list, &ieee->network_free_list);
78 }
79
alloc_ieee80211(int sizeof_priv)80 struct net_device *alloc_ieee80211(int sizeof_priv)
81 {
82 struct ieee80211_device *ieee;
83 struct net_device *dev;
84 int i, err;
85
86 IEEE80211_DEBUG_INFO("Initializing...\n");
87
88 dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv);
89 if (!dev) {
90 IEEE80211_ERROR("Unable to network device.\n");
91 goto failed;
92 }
93
94 ieee = netdev_priv(dev);
95 ieee->dev = dev;
96
97 err = ieee80211_networks_allocate(ieee);
98 if (err) {
99 IEEE80211_ERROR("Unable to allocate beacon storage: %d\n",
100 err);
101 goto failed;
102 }
103 ieee80211_networks_initialize(ieee);
104
105 /* Default fragmentation threshold is maximum payload size */
106 ieee->fts = DEFAULT_FTS;
107 ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
108 ieee->open_wep = 1;
109
110 /* Default to enabling full open WEP with host based encrypt/decrypt */
111 ieee->host_encrypt = 1;
112 ieee->host_decrypt = 1;
113 ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
114
115 INIT_LIST_HEAD(&ieee->crypt_deinit_list);
116 timer_setup(&ieee->crypt_deinit_timer, ieee80211_crypt_deinit_handler,
117 0);
118
119 spin_lock_init(&ieee->lock);
120 spin_lock_init(&ieee->wpax_suitlist_lock);
121 spin_lock_init(&ieee->bw_spinlock);
122 spin_lock_init(&ieee->reorder_spinlock);
123 /* added by WB */
124 atomic_set(&ieee->atm_chnlop, 0);
125 atomic_set(&ieee->atm_swbw, 0);
126
127 ieee->wpax_type_set = 0;
128 ieee->wpa_enabled = 0;
129 ieee->tkip_countermeasures = 0;
130 ieee->drop_unencrypted = 0;
131 ieee->privacy_invoked = 0;
132 ieee->ieee802_1x = 1;
133 ieee->raw_tx = 0;
134 //ieee->hwsec_support = 1; //defalt support hw security. //use module_param instead.
135 ieee->hwsec_active = 0; /* disable hwsec, switch it on when necessary. */
136
137 ieee80211_softmac_init(ieee);
138
139 ieee->pHTInfo = kzalloc(sizeof(RT_HIGH_THROUGHPUT), GFP_KERNEL);
140 if (!ieee->pHTInfo) {
141 IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't alloc memory for HTInfo\n");
142
143 /* By this point in code ieee80211_networks_allocate() has been
144 * successfully called so the memory allocated should be freed
145 */
146 ieee80211_networks_free(ieee);
147 goto failed;
148 }
149 HTUpdateDefaultSetting(ieee);
150 HTInitializeHTInfo(ieee); /* may move to other place. */
151 TSInitialize(ieee);
152
153 for (i = 0; i < IEEE_IBSS_MAC_HASH_SIZE; i++)
154 INIT_LIST_HEAD(&ieee->ibss_mac_hash[i]);
155
156 for (i = 0; i < 17; i++) {
157 ieee->last_rxseq_num[i] = -1;
158 ieee->last_rxfrag_num[i] = -1;
159 ieee->last_packet_time[i] = 0;
160 }
161
162 /* These function were added to load crypte module autoly */
163 ieee80211_tkip_null();
164
165 return dev;
166
167 failed:
168 if (dev)
169 free_netdev(dev);
170
171 return NULL;
172 }
173
free_ieee80211(struct net_device * dev)174 void free_ieee80211(struct net_device *dev)
175 {
176 struct ieee80211_device *ieee = netdev_priv(dev);
177 int i;
178 /* struct list_head *p, *q; */
179 // del_timer_sync(&ieee->SwBwTimer);
180 kfree(ieee->pHTInfo);
181 ieee->pHTInfo = NULL;
182 RemoveAllTS(ieee);
183 ieee80211_softmac_free(ieee);
184 del_timer_sync(&ieee->crypt_deinit_timer);
185 ieee80211_crypt_deinit_entries(ieee, 1);
186
187 for (i = 0; i < WEP_KEYS; i++) {
188 struct ieee80211_crypt_data *crypt = ieee->crypt[i];
189
190 if (crypt) {
191 if (crypt->ops)
192 crypt->ops->deinit(crypt->priv);
193 kfree(crypt);
194 ieee->crypt[i] = NULL;
195 }
196 }
197
198 ieee80211_networks_free(ieee);
199 free_netdev(dev);
200 }
201
202 #ifdef CONFIG_IEEE80211_DEBUG
203
204 u32 ieee80211_debug_level;
205 static int debug = // IEEE80211_DL_INFO |
206 // IEEE80211_DL_WX |
207 // IEEE80211_DL_SCAN |
208 // IEEE80211_DL_STATE |
209 // IEEE80211_DL_MGMT |
210 // IEEE80211_DL_FRAG |
211 // IEEE80211_DL_EAP |
212 // IEEE80211_DL_DROP |
213 // IEEE80211_DL_TX |
214 // IEEE80211_DL_RX |
215 //IEEE80211_DL_QOS |
216 // IEEE80211_DL_HT |
217 // IEEE80211_DL_TS |
218 // IEEE80211_DL_BA |
219 // IEEE80211_DL_REORDER|
220 // IEEE80211_DL_TRACE |
221 //IEEE80211_DL_DATA |
222 IEEE80211_DL_ERR /* awayls open this flags to show error out */
223 ;
224 static struct proc_dir_entry *ieee80211_proc;
225
show_debug_level(struct seq_file * m,void * v)226 static int show_debug_level(struct seq_file *m, void *v)
227 {
228 seq_printf(m, "0x%08X\n", ieee80211_debug_level);
229
230 return 0;
231 }
232
write_debug_level(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)233 static ssize_t write_debug_level(struct file *file, const char __user *buffer,
234 size_t count, loff_t *ppos)
235 {
236 unsigned long val;
237 int err = kstrtoul_from_user(buffer, count, 0, &val);
238
239 if (err)
240 return err;
241 ieee80211_debug_level = val;
242 return count;
243 }
244
open_debug_level(struct inode * inode,struct file * file)245 static int open_debug_level(struct inode *inode, struct file *file)
246 {
247 return single_open(file, show_debug_level, NULL);
248 }
249
250 static const struct proc_ops debug_level_proc_ops = {
251 .proc_open = open_debug_level,
252 .proc_read = seq_read,
253 .proc_lseek = seq_lseek,
254 .proc_write = write_debug_level,
255 .proc_release = single_release,
256 };
257
ieee80211_debug_init(void)258 int __init ieee80211_debug_init(void)
259 {
260 struct proc_dir_entry *e;
261
262 ieee80211_debug_level = debug;
263
264 ieee80211_proc = proc_mkdir(DRV_NAME, init_net.proc_net);
265 if (!ieee80211_proc) {
266 IEEE80211_ERROR("Unable to create " DRV_NAME
267 " proc directory\n");
268 return -EIO;
269 }
270 e = proc_create("debug_level", 0644, ieee80211_proc, &debug_level_proc_ops);
271 if (!e) {
272 remove_proc_entry(DRV_NAME, init_net.proc_net);
273 ieee80211_proc = NULL;
274 return -EIO;
275 }
276 return 0;
277 }
278
ieee80211_debug_exit(void)279 void __exit ieee80211_debug_exit(void)
280 {
281 if (ieee80211_proc) {
282 remove_proc_entry("debug_level", ieee80211_proc);
283 remove_proc_entry(DRV_NAME, init_net.proc_net);
284 ieee80211_proc = NULL;
285 }
286 }
287
288 module_param(debug, int, 0444);
289 MODULE_PARM_DESC(debug, "debug output mask");
290 #endif
291