net/ieee80211/ieee80211_module.c - kernel/msm-5.4 - Gitiles

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

   Copyright(c) 2004 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
   <jkmaline@cc.hut.fi>
   Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.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/config.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/version.h>
 #include <linux/wireless.h>
 #include <linux/etherdevice.h>
 #include <asm/uaccess.h>
 #include <net/arp.h>

 #include <net/ieee80211.h>

 MODULE_DESCRIPTION("802.11 data/management/control stack");
 MODULE_AUTHOR("Copyright (C) 2004 Intel Corporation <jketreno@linux.intel.com>");
 MODULE_LICENSE("GPL");

 #define DRV_NAME "ieee80211"

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

 	ieee->networks = kmalloc(
 		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;
 	}

 	memset(ieee->networks, 0,
 	       MAX_NETWORK_COUNT * sizeof(struct ieee80211_network));

 	return 0;
 }

 static inline void ieee80211_networks_free(struct ieee80211_device *ieee)
 {
 	if (!ieee->networks)
 		return;
 	kfree(ieee->networks);
 	ieee->networks = NULL;
 }

 static inline 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);
 }


 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 network device.\n");
 		goto failed;
 	}
 	ieee = netdev_priv(dev);
 	dev->hard_start_xmit = ieee80211_xmit;

 	ieee->dev = dev;

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

 	/* Default fragmentation threshold is maximum payload size */
 	ieee->fts = 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->ieee802_1x = 1; /* Default to supporting 802.1x */

 	INIT_LIST_HEAD(&ieee->crypt_deinit_list);
 	init_timer(&ieee->crypt_deinit_timer);
 	ieee->crypt_deinit_timer.data = (unsigned long)ieee;
 	ieee->crypt_deinit_timer.function = ieee80211_crypt_deinit_handler;

 	spin_lock_init(&ieee->lock);

  	ieee->wpa_enabled = 0;
  	ieee->tkip_countermeasures = 0;
  	ieee->drop_unencrypted = 0;
  	ieee->privacy_invoked = 0;
  	ieee->ieee802_1x = 1;

 	return dev;

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


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

 	int i;

 	del_timer_sync(&ieee->crypt_deinit_timer);
 	ieee80211_crypt_deinit_entries(ieee, 1);

 	for (i = 0; i < WEP_KEYS; i++) {
 		struct ieee80211_crypt_data *crypt = ieee->crypt[i];
 		if (crypt) {
 			if (crypt->ops) {
 				crypt->ops->deinit(crypt->priv);
 				module_put(crypt->ops->owner);
 			}
 			kfree(crypt);
 			ieee->crypt[i] = NULL;
 		}
 	}

 	ieee80211_networks_free(ieee);
 	free_netdev(dev);
 }

 #ifdef CONFIG_IEEE80211_DEBUG

 static int debug = 0;
 u32 ieee80211_debug_level = 0;
 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";
 	char *p = (char *)buf;
 	unsigned long val;

 	if (count > sizeof(buf) - 1)
 		count = sizeof(buf) - 1;

 	if (copy_from_user(buf, buffer, count))
 		return count;
 	buf[count] = 0;
 	/*
 	 * what a FPOS...  What, sscanf(buf, "%i", &val) would be too
 	 * scary?
 	 */
 	if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
 		p++;
 		if (p[0] == 'x' || p[0] == 'X')
 			p++;
 		val = simple_strtoul(p, &p, 16);
 	} else
 		val = simple_strtoul(p, &p, 10);
 	if (p == buf)
 		printk(KERN_INFO DRV_NAME
 		       ": %s is not in hex or decimal form.\n", buf);
 	else
 		ieee80211_debug_level = val;

 	return strlen(buf);
 }

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

 	ieee80211_debug_level = debug;
 	ieee80211_proc = create_proc_entry(DRV_NAME, S_IFDIR, 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, proc_net);
 		ieee80211_proc = NULL;
 		return -EIO;
 	}
 	e->read_proc = show_debug_level;
 	e->write_proc = store_debug_level;
 	e->data = NULL;

 	return 0;
 }

 static void __exit ieee80211_exit(void)
 {
 	if (ieee80211_proc) {
 		remove_proc_entry("debug_level", ieee80211_proc);
 		remove_proc_entry(DRV_NAME, proc_net);
 		ieee80211_proc = NULL;
 	}
 }

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


 module_exit(ieee80211_exit);
 module_init(ieee80211_init);
 #endif


 const char *escape_essid(const char *essid, u8 essid_len) {
 	static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 	const char *s = essid;
 	char *d = escaped;

 	if (ieee80211_is_empty_essid(essid, essid_len)) {
 		memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 		return escaped;
 	}

 	essid_len = min(essid_len, (u8)IW_ESSID_MAX_SIZE);
 	while (essid_len--) {
 		if (*s == '\0') {
 			*d++ = '\\';
 			*d++ = '0';
 			s++;
 		} else {
 			*d++ = *s++;
 		}
 	}
 	*d = '\0';
 	return escaped;
 }

 EXPORT_SYMBOL(alloc_ieee80211);
 EXPORT_SYMBOL(free_ieee80211);
 EXPORT_SYMBOL(escape_essid);
	/*******************************************************************************

	Copyright(c) 2004 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
	<jkmaline@cc.hut.fi>
	Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.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/config.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/version.h>
	#include <linux/wireless.h>
	#include <linux/etherdevice.h>
	#include <asm/uaccess.h>
	#include <net/arp.h>

	#include <net/ieee80211.h>

	MODULE_DESCRIPTION("802.11 data/management/control stack");
	MODULE_AUTHOR("Copyright (C) 2004 Intel Corporation <jketreno@linux.intel.com>");
	MODULE_LICENSE("GPL");

	#define DRV_NAME "ieee80211"

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

	ieee->networks = kmalloc(
	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;
	}

	memset(ieee->networks, 0,
	MAX_NETWORK_COUNT * sizeof(struct ieee80211_network));

	return 0;
	}

	static inline void ieee80211_networks_free(struct ieee80211_device *ieee)
	{
	if (!ieee->networks)
	return;
	kfree(ieee->networks);
	ieee->networks = NULL;
	}

	static inline 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);
	}


	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 network device.\n");
	goto failed;
	}
	ieee = netdev_priv(dev);
	dev->hard_start_xmit = ieee80211_xmit;

	ieee->dev = dev;

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

	/* Default fragmentation threshold is maximum payload size */
	ieee->fts = 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->ieee802_1x = 1; /* Default to supporting 802.1x */

	INIT_LIST_HEAD(&ieee->crypt_deinit_list);
	init_timer(&ieee->crypt_deinit_timer);
	ieee->crypt_deinit_timer.data = (unsigned long)ieee;
	ieee->crypt_deinit_timer.function = ieee80211_crypt_deinit_handler;

	spin_lock_init(&ieee->lock);

	ieee->wpa_enabled = 0;
	ieee->tkip_countermeasures = 0;
	ieee->drop_unencrypted = 0;
	ieee->privacy_invoked = 0;
	ieee->ieee802_1x = 1;

	return dev;

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


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

	int i;

	del_timer_sync(&ieee->crypt_deinit_timer);
	ieee80211_crypt_deinit_entries(ieee, 1);

	for (i = 0; i < WEP_KEYS; i++) {
	struct ieee80211_crypt_data *crypt = ieee->crypt[i];
	if (crypt) {
	if (crypt->ops) {
	crypt->ops->deinit(crypt->priv);
	module_put(crypt->ops->owner);
	}
	kfree(crypt);
	ieee->crypt[i] = NULL;
	}
	}

	ieee80211_networks_free(ieee);
	free_netdev(dev);
	}

	#ifdef CONFIG_IEEE80211_DEBUG

	static int debug = 0;
	u32 ieee80211_debug_level = 0;
	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";
	char p = (char )buf;
	unsigned long val;

	if (count > sizeof(buf) - 1)
	count = sizeof(buf) - 1;

	if (copy_from_user(buf, buffer, count))
	return count;
	buf[count] = 0;
	/*
	* what a FPOS... What, sscanf(buf, "%i", &val) would be too
	* scary?
	*/
	if (p[1] == 'x' \|\| p[1] == 'X' \|\| p[0] == 'x' \|\| p[0] == 'X') {
	p++;
	if (p[0] == 'x' \|\| p[0] == 'X')
	p++;
	val = simple_strtoul(p, &p, 16);
	} else
	val = simple_strtoul(p, &p, 10);
	if (p == buf)
	printk(KERN_INFO DRV_NAME
	": %s is not in hex or decimal form.\n", buf);
	else
	ieee80211_debug_level = val;

	return strlen(buf);
	}

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

	ieee80211_debug_level = debug;
	ieee80211_proc = create_proc_entry(DRV_NAME, S_IFDIR, 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, proc_net);
	ieee80211_proc = NULL;
	return -EIO;
	}
	e->read_proc = show_debug_level;
	e->write_proc = store_debug_level;
	e->data = NULL;

	return 0;
	}

	static void __exit ieee80211_exit(void)
	{
	if (ieee80211_proc) {
	remove_proc_entry("debug_level", ieee80211_proc);
	remove_proc_entry(DRV_NAME, proc_net);
	ieee80211_proc = NULL;
	}
	}

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


	module_exit(ieee80211_exit);
	module_init(ieee80211_init);
	#endif


	const char escape_essid(const char essid, u8 essid_len) {
	static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
	const char *s = essid;
	char *d = escaped;

	if (ieee80211_is_empty_essid(essid, essid_len)) {
	memcpy(escaped, "<hidden>", sizeof("<hidden>"));
	return escaped;
	}

	essid_len = min(essid_len, (u8)IW_ESSID_MAX_SIZE);
	while (essid_len--) {
	if (*s == '\0') {
	*d++ = '\\';
	*d++ = '0';
	s++;
	} else {
	d++ = s++;
	}
	}
	*d = '\0';
	return escaped;
	}

	EXPORT_SYMBOL(alloc_ieee80211);
	EXPORT_SYMBOL(free_ieee80211);
	EXPORT_SYMBOL(escape_essid);