[linux-block.git] / net / ieee80211 / ieee80211_module.c

/*******************************************************************************

  Copyright(c) 2004-2005 Intel Corporation. All rights reserved.

  Portions of this file are based on the WEP enablement code provided by the
  Host AP project hostap-drivers v0.1.3
  Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
  <j@w1.fi>
  Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>

  This program is free software; you can redistribute it and/or modify it
  under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation.

  This program is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc., 59
  Temple Place - Suite 330, Boston, MA  02111-1307, USA.

  The full GNU General Public License is included in this distribution in the
  file called LICENSE.

  Contact Information:
  James P. Ketrenos <ipw2100-admin@linux.intel.com>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

*******************************************************************************/

#include <linux/compiler.h>
#include <linux/errno.h>
#include <linux/if_arp.h>
#include <linux/in6.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/proc_fs.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/tcp.h>
#include <linux/types.h>
#include <linux/wireless.h>
#include <linux/etherdevice.h>
#include <asm/uaccess.h>
#include <net/net_namespace.h>
#include <net/arp.h>

#include <net/ieee80211.h>

#define DRV_DESCRIPTION "802.11 data/management/control stack"
#define DRV_NAME        "ieee80211"
#define DRV_VERSION	IEEE80211_VERSION
#define DRV_COPYRIGHT   "Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>"

MODULE_VERSION(DRV_VERSION);
MODULE_DESCRIPTION(DRV_DESCRIPTION);
MODULE_AUTHOR(DRV_COPYRIGHT);
MODULE_LICENSE("GPL");

static int ieee80211_networks_allocate(struct ieee80211_device *ieee)
{
	if (ieee->networks)
		return 0;

	ieee->networks =
	    kzalloc(MAX_NETWORK_COUNT * sizeof(struct ieee80211_network),
		    GFP_KERNEL);
	if (!ieee->networks) {
		printk(KERN_WARNING "%s: Out of memory allocating beacons\n",
		       ieee->dev->name);
		return -ENOMEM;
	}

	return 0;
}

void ieee80211_network_reset(struct ieee80211_network *network)
{
	if (!network)
		return;

	if (network->ibss_dfs) {
		kfree(network->ibss_dfs);
		network->ibss_dfs = NULL;
	}
}

static inline void ieee80211_networks_free(struct ieee80211_device *ieee)
{
	int i;

	if (!ieee->networks)
		return;

	for (i = 0; i < MAX_NETWORK_COUNT; i++)
		if (ieee->networks[i].ibss_dfs)
			kfree(ieee->networks[i].ibss_dfs);

	kfree(ieee->networks);
	ieee->networks = NULL;
}

static void ieee80211_networks_initialize(struct ieee80211_device *ieee)
{
	int i;

	INIT_LIST_HEAD(&ieee->network_free_list);
	INIT_LIST_HEAD(&ieee->network_list);
	for (i = 0; i < MAX_NETWORK_COUNT; i++)
		list_add_tail(&ieee->networks[i].list,
			      &ieee->network_free_list);
}

static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
{
	if ((new_mtu < 68) || (new_mtu > IEEE80211_DATA_LEN))
		return -EINVAL;
	dev->mtu = new_mtu;
	return 0;
}

static struct net_device_stats *ieee80211_generic_get_stats(
	struct net_device *dev)
{
	struct ieee80211_device *ieee = netdev_priv(dev);
	return &ieee->stats;
}

struct net_device *alloc_ieee80211(int sizeof_priv)
{
	struct ieee80211_device *ieee;
	struct net_device *dev;
	int err;

	IEEE80211_DEBUG_INFO("Initializing...\n");

	dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv);
	if (!dev) {
		IEEE80211_ERROR("Unable to allocate network device.\n");
		goto failed;
	}
	ieee = netdev_priv(dev);
	dev->hard_start_xmit = ieee80211_xmit;
	dev->change_mtu = ieee80211_change_mtu;

	/* Drivers are free to override this if the generic implementation
	 * does not meet their needs. */
	dev->get_stats = ieee80211_generic_get_stats;

	ieee->dev = dev;

	err = ieee80211_networks_allocate(ieee);
	if (err) {
		IEEE80211_ERROR("Unable to allocate beacon storage: %d\n", err);
		goto failed_free_netdev;
	}
	ieee80211_networks_initialize(ieee);

	/* Default fragmentation threshold is maximum payload size */
	ieee->fts = DEFAULT_FTS;
	ieee->rts = DEFAULT_FTS;
	ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
	ieee->open_wep = 1;

	/* Default to enabling full open WEP with host based encrypt/decrypt */
	ieee->host_encrypt = 1;
	ieee->host_decrypt = 1;
	ieee->host_mc_decrypt = 1;

	/* Host fragementation in Open mode. Default is enabled.
	 * Note: host fragmentation is always enabled if host encryption
	 * is enabled. For cards can do hardware encryption, they must do
	 * hardware fragmentation as well. So we don't need a variable
	 * like host_enc_frag. */
	ieee->host_open_frag = 1;
	ieee->ieee802_1x = 1;	/* Default to supporting 802.1x */

	spin_lock_init(&ieee->lock);

	ieee->crypt_info.name = dev->name;
	ieee->crypt_info.lock = &ieee->lock;
	INIT_LIST_HEAD(&ieee->crypt_info.crypt_deinit_list);
	setup_timer(&ieee->crypt_info.crypt_deinit_timer,
			lib80211_crypt_deinit_handler,
			(unsigned long)&ieee->crypt_info);
	ieee->crypt_info.crypt_quiesced = 0;

	ieee->wpa_enabled = 0;
	ieee->drop_unencrypted = 0;
	ieee->privacy_invoked = 0;

	return dev;

failed_free_netdev:
	free_netdev(dev);
failed:
	return NULL;
}

void free_ieee80211(struct net_device *dev)
{
	struct ieee80211_device *ieee = netdev_priv(dev);

	int i;

	lib80211_crypt_quiescing(&ieee->crypt_info);
	del_timer_sync(&ieee->crypt_info.crypt_deinit_timer);
	lib80211_crypt_deinit_entries(&ieee->crypt_info, 1);

	for (i = 0; i < WEP_KEYS; i++) {
		struct lib80211_crypt_data *crypt = ieee->crypt_info.crypt[i];
		if (crypt) {
			if (crypt->ops) {
				crypt->ops->deinit(crypt->priv);
				module_put(crypt->ops->owner);
			}
			kfree(crypt);
			ieee->crypt_info.crypt[i] = NULL;
		}
	}

	ieee80211_networks_free(ieee);
	free_netdev(dev);
}

#ifdef CONFIG_IEEE80211_DEBUG

static int debug = 0;
u32 ieee80211_debug_level = 0;
EXPORT_SYMBOL_GPL(ieee80211_debug_level);
static struct proc_dir_entry *ieee80211_proc = NULL;

static int show_debug_level(char *page, char **start, off_t offset,
			    int count, int *eof, void *data)
{
	return snprintf(page, count, "0x%08X\n", ieee80211_debug_level);
}

static int store_debug_level(struct file *file, const char __user * buffer,
			     unsigned long count, void *data)
{
	char buf[] = "0x00000000\n";
	unsigned long len = min((unsigned long)sizeof(buf) - 1, count);
	unsigned long val;

	if (copy_from_user(buf, buffer, len))
		return count;
	buf[len] = 0;
	if (sscanf(buf, "%li", &val) != 1)
		printk(KERN_INFO DRV_NAME
		       ": %s is not in hex or decimal form.\n", buf);
	else
		ieee80211_debug_level = val;

	return strnlen(buf, len);
}
#endif				/* CONFIG_IEEE80211_DEBUG */

static int __init ieee80211_init(void)
{
#ifdef CONFIG_IEEE80211_DEBUG
	struct proc_dir_entry *e;

	ieee80211_debug_level = debug;
	ieee80211_proc = proc_mkdir(DRV_NAME, init_net.proc_net);
	if (ieee80211_proc == NULL) {
		IEEE80211_ERROR("Unable to create " DRV_NAME
				" proc directory\n");
		return -EIO;
	}
	e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
			      ieee80211_proc);
	if (!e) {
		remove_proc_entry(DRV_NAME, init_net.proc_net);
		ieee80211_proc = NULL;
		return -EIO;
	}
	e->read_proc = show_debug_level;
	e->write_proc = store_debug_level;
	e->data = NULL;
#endif				/* CONFIG_IEEE80211_DEBUG */

	printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
	printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");

	return 0;
}

static void __exit ieee80211_exit(void)
{
#ifdef CONFIG_IEEE80211_DEBUG
	if (ieee80211_proc) {
		remove_proc_entry("debug_level", ieee80211_proc);
		remove_proc_entry(DRV_NAME, init_net.proc_net);
		ieee80211_proc = NULL;
	}
#endif				/* CONFIG_IEEE80211_DEBUG */
}

#ifdef CONFIG_IEEE80211_DEBUG
#include <linux/moduleparam.h>
module_param(debug, int, 0444);
MODULE_PARM_DESC(debug, "debug output mask");
#endif				/* CONFIG_IEEE80211_DEBUG */

module_exit(ieee80211_exit);
module_init(ieee80211_init);

EXPORT_SYMBOL(alloc_ieee80211);
EXPORT_SYMBOL(free_ieee80211);
Commit	Line	Data
b453872c JG	1	/*******************************************************************************
b453872c JG	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>
85d32e7b JM	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:
	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>
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>
	49	#include <asm/uaccess.h>
457c4cbc	50	#include <net/net_namespace.h>
b453872c JG	51	#include <net/arp.h>
	52
	53	#include <net/ieee80211.h>
	54
31696160 JK	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>"
	59
	60	MODULE_VERSION(DRV_VERSION);
	61	MODULE_DESCRIPTION(DRV_DESCRIPTION);
	62	MODULE_AUTHOR(DRV_COPYRIGHT);
b453872c JG	63	MODULE_LICENSE("GPL");
b453872c JG	64
858119e1	65	static int ieee80211_networks_allocate(struct ieee80211_device *ieee)
b453872c JG	66	{
	67	if (ieee->networks)
	68	return 0;
	69
0edd5b44	70	ieee->networks =
571d6eee	71	kzalloc(MAX_NETWORK_COUNT * sizeof(struct ieee80211_network),
0edd5b44	72	GFP_KERNEL);
b453872c JG	73	if (!ieee->networks) {
	74	printk(KERN_WARNING "%s: Out of memory allocating beacons\n",
	75	ieee->dev->name);
	76	return -ENOMEM;
	77	}
	78
b453872c JG	79	return 0;
	80	}
	81
15f38598 ZY	82	void ieee80211_network_reset(struct ieee80211_network *network)
	83	{
	84	if (!network)
	85	return;
	86
	87	if (network->ibss_dfs) {
	88	kfree(network->ibss_dfs);
	89	network->ibss_dfs = NULL;
	90	}
	91	}
	92
b453872c JG	93	static inline void ieee80211_networks_free(struct ieee80211_device *ieee)
b453872c JG	94	{
15f38598 ZY	95	int i;
15f38598 ZY	96
b453872c JG	97	if (!ieee->networks)
b453872c JG	98	return;
15f38598 ZY	99
	100	for (i = 0; i < MAX_NETWORK_COUNT; i++)
	101	if (ieee->networks[i].ibss_dfs)
	102	kfree(ieee->networks[i].ibss_dfs);
	103
b453872c JG	104	kfree(ieee->networks);
	105	ieee->networks = NULL;
	106	}
	107
858119e1	108	static void ieee80211_networks_initialize(struct ieee80211_device *ieee)
b453872c JG	109	{
	110	int i;
	111
	112	INIT_LIST_HEAD(&ieee->network_free_list);
	113	INIT_LIST_HEAD(&ieee->network_list);
	114	for (i = 0; i < MAX_NETWORK_COUNT; i++)
0edd5b44 JG	115	list_add_tail(&ieee->networks[i].list,
0edd5b44 JG	116	&ieee->network_free_list);
b453872c JG	117	}
b453872c JG	118
42a4cf95	119	static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
	120	{
	121	if ((new_mtu < 68) \|\| (new_mtu > IEEE80211_DATA_LEN))
	122	return -EINVAL;
	123	dev->mtu = new_mtu;
	124	return 0;
	125	}
	126
718cc4ca DD	127	static struct net_device_stats *ieee80211_generic_get_stats(
	128	struct net_device *dev)
	129	{
	130	struct ieee80211_device *ieee = netdev_priv(dev);
	131	return &ieee->stats;
	132	}
	133
b453872c JG	134	struct net_device *alloc_ieee80211(int sizeof_priv)
	135	{
	136	struct ieee80211_device *ieee;
	137	struct net_device *dev;
	138	int err;
	139
	140	IEEE80211_DEBUG_INFO("Initializing...\n");
	141
	142	dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv);
	143	if (!dev) {
a76193df	144	IEEE80211_ERROR("Unable to allocate network device.\n");
b453872c JG	145	goto failed;
	146	}
	147	ieee = netdev_priv(dev);
	148	dev->hard_start_xmit = ieee80211_xmit;
42a4cf95	149	dev->change_mtu = ieee80211_change_mtu;
b453872c	150
718cc4ca DD	151	/* Drivers are free to override this if the generic implementation
	152	* does not meet their needs. */
	153	dev->get_stats = ieee80211_generic_get_stats;
	154
b453872c JG	155	ieee->dev = dev;
	156
	157	err = ieee80211_networks_allocate(ieee);
	158	if (err) {
0edd5b44	159	IEEE80211_ERROR("Unable to allocate beacon storage: %d\n", err);
d92a8e81	160	goto failed_free_netdev;
b453872c JG	161	}
	162	ieee80211_networks_initialize(ieee);
	163
	164	/* Default fragmentation threshold is maximum payload size */
	165	ieee->fts = DEFAULT_FTS;
3cdd00c5	166	ieee->rts = DEFAULT_FTS;
b453872c JG	167	ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
	168	ieee->open_wep = 1;
	169
	170	/* Default to enabling full open WEP with host based encrypt/decrypt */
	171	ieee->host_encrypt = 1;
	172	ieee->host_decrypt = 1;
ccd0fda3 JK	173	ieee->host_mc_decrypt = 1;
ccd0fda3 JK	174
1264fc04 JK	175	/* Host fragementation in Open mode. Default is enabled.
	176	* Note: host fragmentation is always enabled if host encryption
	177	* is enabled. For cards can do hardware encryption, they must do
	178	* hardware fragmentation as well. So we don't need a variable
	179	* like host_enc_frag. */
	180	ieee->host_open_frag = 1;
0edd5b44	181	ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
b453872c	182
b453872c JG	183	spin_lock_init(&ieee->lock);
b453872c JG	184
274bfb8d JL	185	ieee->crypt_info.name = dev->name;
	186	ieee->crypt_info.lock = &ieee->lock;
	187	INIT_LIST_HEAD(&ieee->crypt_info.crypt_deinit_list);
	188	setup_timer(&ieee->crypt_info.crypt_deinit_timer,
	189	lib80211_crypt_deinit_handler,
	190	(unsigned long)&ieee->crypt_info);
	191	ieee->crypt_info.crypt_quiesced = 0;
	192
0edd5b44	193	ieee->wpa_enabled = 0;
0edd5b44 JG	194	ieee->drop_unencrypted = 0;
0edd5b44 JG	195	ieee->privacy_invoked = 0;
b453872c JG	196
	197	return dev;
	198
d92a8e81 JL	199	failed_free_netdev:
	200	free_netdev(dev);
	201	failed:
b453872c JG	202	return NULL;
	203	}
	204
b453872c JG	205	void free_ieee80211(struct net_device *dev)
	206	{
	207	struct ieee80211_device *ieee = netdev_priv(dev);
	208
	209	int i;
	210
274bfb8d JL	211	lib80211_crypt_quiescing(&ieee->crypt_info);
	212	del_timer_sync(&ieee->crypt_info.crypt_deinit_timer);
	213	lib80211_crypt_deinit_entries(&ieee->crypt_info, 1);
b453872c JG	214
b453872c JG	215	for (i = 0; i < WEP_KEYS; i++) {
274bfb8d	216	struct lib80211_crypt_data *crypt = ieee->crypt_info.crypt[i];
b453872c JG	217	if (crypt) {
	218	if (crypt->ops) {
	219	crypt->ops->deinit(crypt->priv);
	220	module_put(crypt->ops->owner);
	221	}
	222	kfree(crypt);
274bfb8d	223	ieee->crypt_info.crypt[i] = NULL;
b453872c JG	224	}
	225	}
	226
	227	ieee80211_networks_free(ieee);
	228	free_netdev(dev);
	229	}
	230
	231	#ifdef CONFIG_IEEE80211_DEBUG
	232
	233	static int debug = 0;
	234	u32 ieee80211_debug_level = 0;
2933d42c	235	EXPORT_SYMBOL_GPL(ieee80211_debug_level);
b7cffb02	236	static struct proc_dir_entry *ieee80211_proc = NULL;
b453872c JG	237
	238	static int show_debug_level(char page, char *start, off_t offset,
	239	int count, int eof, void data)
	240	{
	241	return snprintf(page, count, "0x%08X\n", ieee80211_debug_level);
	242	}
	243
0edd5b44	244	static int store_debug_level(struct file file, const char __user buffer,
b453872c JG	245	unsigned long count, void *data)
b453872c JG	246	{
262d8e46 JK	247	char buf[] = "0x00000000\n";
262d8e46 JK	248	unsigned long len = min((unsigned long)sizeof(buf) - 1, count);
b453872c JG	249	unsigned long val;
b453872c JG	250
262d8e46	251	if (copy_from_user(buf, buffer, len))
b453872c	252	return count;
262d8e46 JK	253	buf[len] = 0;
262d8e46 JK	254	if (sscanf(buf, "%li", &val) != 1)
b453872c JG	255	printk(KERN_INFO DRV_NAME
	256	": %s is not in hex or decimal form.\n", buf);
	257	else
	258	ieee80211_debug_level = val;
	259
262d8e46	260	return strnlen(buf, len);
b453872c	261	}
31696160	262	#endif /* CONFIG_IEEE80211_DEBUG */
b453872c JG	263
	264	static int __init ieee80211_init(void)
	265	{
31696160	266	#ifdef CONFIG_IEEE80211_DEBUG
b453872c JG	267	struct proc_dir_entry *e;
	268
	269	ieee80211_debug_level = debug;
457c4cbc	270	ieee80211_proc = proc_mkdir(DRV_NAME, init_net.proc_net);
b453872c JG	271	if (ieee80211_proc == NULL) {
	272	IEEE80211_ERROR("Unable to create " DRV_NAME
	273	" proc directory\n");
	274	return -EIO;
	275	}
	276	e = create_proc_entry("debug_level", S_IFREG \| S_IRUGO \| S_IWUSR,
	277	ieee80211_proc);
	278	if (!e) {
457c4cbc	279	remove_proc_entry(DRV_NAME, init_net.proc_net);
b453872c JG	280	ieee80211_proc = NULL;
	281	return -EIO;
	282	}
	283	e->read_proc = show_debug_level;
	284	e->write_proc = store_debug_level;
	285	e->data = NULL;
31696160 JK	286	#endif /* CONFIG_IEEE80211_DEBUG */
	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
	294	static void __exit ieee80211_exit(void)
	295	{
31696160	296	#ifdef CONFIG_IEEE80211_DEBUG
b453872c JG	297	if (ieee80211_proc) {
b453872c JG	298	remove_proc_entry("debug_level", ieee80211_proc);
457c4cbc	299	remove_proc_entry(DRV_NAME, init_net.proc_net);
b453872c JG	300	ieee80211_proc = NULL;
b453872c JG	301	}
31696160	302	#endif /* CONFIG_IEEE80211_DEBUG */
b453872c JG	303	}
b453872c JG	304
31696160	305	#ifdef CONFIG_IEEE80211_DEBUG
b453872c JG	306	#include <linux/moduleparam.h>
	307	module_param(debug, int, 0444);
	308	MODULE_PARM_DESC(debug, "debug output mask");
31696160	309	#endif /* CONFIG_IEEE80211_DEBUG */
b453872c	310
b453872c JG	311	module_exit(ieee80211_exit);
b453872c JG	312	module_init(ieee80211_init);
b453872c JG	313
	314	EXPORT_SYMBOL(alloc_ieee80211);
	315	EXPORT_SYMBOL(free_ieee80211);