1 /*******************************************************************************
2  *
3  *  Copyright(c) 2004 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  *  <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>
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 
62 static inline int ieee80211_networks_allocate(struct ieee80211_device *ieee)
63 {
64 	if (ieee->networks)
65 		return 0;
66 
67 	ieee->networks = kcalloc(
68 		MAX_NETWORK_COUNT, 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 
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 
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 
97 
98 struct net_device *alloc_ieee80211(int sizeof_priv)
99 {
100 	struct ieee80211_device *ieee;
101 	struct net_device *dev;
102 	int i, err;
103 
104 	IEEE80211_DEBUG_INFO("Initializing...\n");
105 
106 	dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv);
107 	if (!dev) {
108 		IEEE80211_ERROR("Unable to network device.\n");
109 		goto failed;
110 	}
111 
112 	ieee = netdev_priv(dev);
113 	memset(ieee, 0, sizeof(struct ieee80211_device)+sizeof_priv);
114 	ieee->dev = dev;
115 
116 	err = ieee80211_networks_allocate(ieee);
117 	if (err) {
118 		IEEE80211_ERROR("Unable to allocate beacon storage: %d\n",
119 				err);
120 		goto failed;
121 	}
122 	ieee80211_networks_initialize(ieee);
123 
124 
125 	/* Default fragmentation threshold is maximum payload size */
126 	ieee->fts = DEFAULT_FTS;
127 	ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
128 	ieee->open_wep = 1;
129 
130 	/* Default to enabling full open WEP with host based encrypt/decrypt */
131 	ieee->host_encrypt = 1;
132 	ieee->host_decrypt = 1;
133 	ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
134 
135 	INIT_LIST_HEAD(&ieee->crypt_deinit_list);
136 	setup_timer(&ieee->crypt_deinit_timer,
137 		    ieee80211_crypt_deinit_handler, (unsigned long)ieee);
138 
139 	spin_lock_init(&ieee->lock);
140 	spin_lock_init(&ieee->wpax_suitlist_lock);
141 	spin_lock_init(&ieee->bw_spinlock);
142 	spin_lock_init(&ieee->reorder_spinlock);
143 	/* added by WB */
144 	atomic_set(&ieee->atm_chnlop, 0);
145 	atomic_set(&ieee->atm_swbw, 0);
146 
147 	ieee->wpax_type_set = 0;
148 	ieee->wpa_enabled = 0;
149 	ieee->tkip_countermeasures = 0;
150 	ieee->drop_unencrypted = 0;
151 	ieee->privacy_invoked = 0;
152 	ieee->ieee802_1x = 1;
153 	ieee->raw_tx = 0;
154 	//ieee->hwsec_support = 1; //defalt support hw security. //use module_param instead.
155 	ieee->hwsec_active = 0; /* disable hwsec, switch it on when necessary. */
156 
157 	ieee80211_softmac_init(ieee);
158 
159 	ieee->pHTInfo = kzalloc(sizeof(RT_HIGH_THROUGHPUT), GFP_KERNEL);
160 	if (ieee->pHTInfo == NULL) {
161 		IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't alloc memory for HTInfo\n");
162 		goto failed;
163 	}
164 	HTUpdateDefaultSetting(ieee);
165 	HTInitializeHTInfo(ieee); /* may move to other place. */
166 	TSInitialize(ieee);
167 
168 	for (i = 0; i < IEEE_IBSS_MAC_HASH_SIZE; i++)
169 		INIT_LIST_HEAD(&ieee->ibss_mac_hash[i]);
170 
171 	for (i = 0; i < 17; i++) {
172 	  ieee->last_rxseq_num[i] = -1;
173 	  ieee->last_rxfrag_num[i] = -1;
174 	  ieee->last_packet_time[i] = 0;
175 	}
176 
177 /* These function were added to load crypte module autoly */
178 	ieee80211_tkip_null();
179 
180 	return dev;
181 
182  failed:
183 	if (dev)
184 		free_netdev(dev);
185 
186 	return NULL;
187 }
188 
189 
190 void free_ieee80211(struct net_device *dev)
191 {
192 	struct ieee80211_device *ieee = netdev_priv(dev);
193 	int i;
194 	/* struct list_head *p, *q; */
195 //	del_timer_sync(&ieee->SwBwTimer);
196 	kfree(ieee->pHTInfo);
197 	ieee->pHTInfo = NULL;
198 	RemoveAllTS(ieee);
199 	ieee80211_softmac_free(ieee);
200 	del_timer_sync(&ieee->crypt_deinit_timer);
201 	ieee80211_crypt_deinit_entries(ieee, 1);
202 
203 	for (i = 0; i < WEP_KEYS; i++) {
204 		struct ieee80211_crypt_data *crypt = ieee->crypt[i];
205 		if (crypt) {
206 			if (crypt->ops)
207 				crypt->ops->deinit(crypt->priv);
208 			kfree(crypt);
209 			ieee->crypt[i] = NULL;
210 		}
211 	}
212 
213 	ieee80211_networks_free(ieee);
214 	free_netdev(dev);
215 }
216 
217 #ifdef CONFIG_IEEE80211_DEBUG
218 
219 u32 ieee80211_debug_level;
220 static int debug = \
221 	//		    IEEE80211_DL_INFO	|
222 	//		    IEEE80211_DL_WX	|
223 	//		    IEEE80211_DL_SCAN	|
224 	//		    IEEE80211_DL_STATE	|
225 	//		    IEEE80211_DL_MGMT	|
226 	//		    IEEE80211_DL_FRAG	|
227 	//		    IEEE80211_DL_EAP	|
228 	//		    IEEE80211_DL_DROP	|
229 	//		    IEEE80211_DL_TX	|
230 	//		    IEEE80211_DL_RX	|
231 			    //IEEE80211_DL_QOS    |
232 	//		    IEEE80211_DL_HT	|
233 	//		    IEEE80211_DL_TS	|
234 //			    IEEE80211_DL_BA	|
235 	//		    IEEE80211_DL_REORDER|
236 //			    IEEE80211_DL_TRACE  |
237 			    //IEEE80211_DL_DATA	|
238 			    IEEE80211_DL_ERR	  /* awayls open this flags to show error out */
239 			    ;
240 static struct proc_dir_entry *ieee80211_proc;
241 
242 static int show_debug_level(struct seq_file *m, void *v)
243 {
244 	seq_printf(m, "0x%08X\n", ieee80211_debug_level);
245 
246 	return 0;
247 }
248 
249 static ssize_t write_debug_level(struct file *file, const char __user *buffer,
250 			     size_t count, loff_t *ppos)
251 {
252 	unsigned long val;
253 	int err = kstrtoul_from_user(buffer, count, 0, &val);
254 	if (err)
255 		return err;
256 	ieee80211_debug_level = val;
257 	return count;
258 }
259 
260 static int open_debug_level(struct inode *inode, struct file *file)
261 {
262 	return single_open(file, show_debug_level, NULL);
263 }
264 
265 static const struct file_operations fops = {
266 	.open = open_debug_level,
267 	.read = seq_read,
268 	.llseek = seq_lseek,
269 	.write = write_debug_level,
270 	.release = single_release,
271 };
272 
273 int __init ieee80211_debug_init(void)
274 {
275 	struct proc_dir_entry *e;
276 
277 	ieee80211_debug_level = debug;
278 
279 	ieee80211_proc = proc_mkdir(DRV_NAME, init_net.proc_net);
280 	if (ieee80211_proc == NULL) {
281 		IEEE80211_ERROR("Unable to create " DRV_NAME
282 				" proc directory\n");
283 		return -EIO;
284 	}
285 	e = proc_create("debug_level", 0644, ieee80211_proc, &fops);
286 	if (!e) {
287 		remove_proc_entry(DRV_NAME, init_net.proc_net);
288 		ieee80211_proc = NULL;
289 		return -EIO;
290 	}
291 	return 0;
292 }
293 
294 void __exit ieee80211_debug_exit(void)
295 {
296 	if (ieee80211_proc) {
297 		remove_proc_entry("debug_level", ieee80211_proc);
298 		remove_proc_entry(DRV_NAME, init_net.proc_net);
299 		ieee80211_proc = NULL;
300 	}
301 }
302 
303 module_param(debug, int, 0444);
304 MODULE_PARM_DESC(debug, "debug output mask");
305 #endif
306