drivers/net/wireless/ipw2x00/libipw_module.c - kernel/bruno - Git at Google

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

   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:
   Intel Linux Wireless <ilw@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 "libipw.h"

 #define DRV_DESCRIPTION "802.11 data/management/control stack"
 #define DRV_NAME        "libipw"
 #define DRV_PROCNAME	"ieee80211"
 #define DRV_VERSION	LIBIPW_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 struct cfg80211_ops libipw_config_ops = { };
 static void *libipw_wiphy_privid = &libipw_wiphy_privid;

 static int libipw_networks_allocate(struct libipw_device *ieee)
 {
 	int i, j;

 	for (i = 0; i < MAX_NETWORK_COUNT; i++) {
 		ieee->networks[i] = kzalloc(sizeof(struct libipw_network),
 					    GFP_KERNEL);
 		if (!ieee->networks[i]) {
 			LIBIPW_ERROR("Out of memory allocating beacons\n");
 			for (j = 0; j < i; j++)
 				kfree(ieee->networks[j]);
 			return -ENOMEM;
 		}
 	}

 	return 0;
 }

 static inline void libipw_networks_free(struct libipw_device *ieee)
 {
 	int i;

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

 void libipw_networks_age(struct libipw_device *ieee,
                             unsigned long age_secs)
 {
 	struct libipw_network *network = NULL;
 	unsigned long flags;
 	unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC);

 	spin_lock_irqsave(&ieee->lock, flags);
 	list_for_each_entry(network, &ieee->network_list, list) {
 		network->last_scanned -= age_jiffies;
 	}
 	spin_unlock_irqrestore(&ieee->lock, flags);
 }
 EXPORT_SYMBOL(libipw_networks_age);

 static void libipw_networks_initialize(struct libipw_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);
 }

 int libipw_change_mtu(struct net_device *dev, int new_mtu)
 {
 	if ((new_mtu < 68) || (new_mtu > LIBIPW_DATA_LEN))
 		return -EINVAL;
 	dev->mtu = new_mtu;
 	return 0;
 }
 EXPORT_SYMBOL(libipw_change_mtu);

 struct net_device *alloc_libipw(int sizeof_priv, int monitor)
 {
 	struct libipw_device *ieee;
 	struct net_device *dev;
 	int err;

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

 	dev = alloc_etherdev(sizeof(struct libipw_device) + sizeof_priv);
 	if (!dev)
 		goto failed;

 	ieee = netdev_priv(dev);

 	ieee->dev = dev;

 	if (!monitor) {
 		ieee->wdev.wiphy = wiphy_new(&libipw_config_ops, 0);
 		if (!ieee->wdev.wiphy) {
 			LIBIPW_ERROR("Unable to allocate wiphy.\n");
 			goto failed_free_netdev;
 		}

 		ieee->dev->ieee80211_ptr = &ieee->wdev;
 		ieee->wdev.iftype = NL80211_IFTYPE_STATION;

 		/* Fill-out wiphy structure bits we know...  Not enough info
 		   here to call set_wiphy_dev or set MAC address or channel info
 		   -- have to do that in ->ndo_init... */
 		ieee->wdev.wiphy->privid = libipw_wiphy_privid;

 		ieee->wdev.wiphy->max_scan_ssids = 1;
 		ieee->wdev.wiphy->max_scan_ie_len = 0;
 		ieee->wdev.wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION)
 						| BIT(NL80211_IFTYPE_ADHOC);
 	}

 	err = libipw_networks_allocate(ieee);
 	if (err) {
 		LIBIPW_ERROR("Unable to allocate beacon storage: %d\n", err);
 		goto failed_free_wiphy;
 	}
 	libipw_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 fragmentation 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);

 	lib80211_crypt_info_init(&ieee->crypt_info, dev->name, &ieee->lock);

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

 	return dev;

 failed_free_wiphy:
 	if (!monitor)
 		wiphy_free(ieee->wdev.wiphy);
 failed_free_netdev:
 	free_netdev(dev);
 failed:
 	return NULL;
 }
 EXPORT_SYMBOL(alloc_libipw);

 void free_libipw(struct net_device *dev, int monitor)
 {
 	struct libipw_device *ieee = netdev_priv(dev);

 	lib80211_crypt_info_free(&ieee->crypt_info);

 	libipw_networks_free(ieee);

 	/* free cfg80211 resources */
 	if (!monitor)
 		wiphy_free(ieee->wdev.wiphy);

 	free_netdev(dev);
 }
 EXPORT_SYMBOL(free_libipw);

 #ifdef CONFIG_LIBIPW_DEBUG

 static int debug = 0;
 u32 libipw_debug_level = 0;
 EXPORT_SYMBOL_GPL(libipw_debug_level);
 static struct proc_dir_entry *libipw_proc = NULL;

 static int debug_level_proc_show(struct seq_file *m, void *v)
 {
 	seq_printf(m, "0x%08X\n", libipw_debug_level);
 	return 0;
 }

 static int debug_level_proc_open(struct inode *inode, struct file *file)
 {
 	return single_open(file, debug_level_proc_show, NULL);
 }

 static ssize_t debug_level_proc_write(struct file *file,
 		const char __user *buffer, size_t count, loff_t *pos)
 {
 	char buf[] = "0x00000000\n";
 	size_t len = min(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
 		libipw_debug_level = val;

 	return strnlen(buf, len);
 }

 static const struct file_operations debug_level_proc_fops = {
 	.owner		= THIS_MODULE,
 	.open		= debug_level_proc_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
 	.release	= single_release,
 	.write		= debug_level_proc_write,
 };
 #endif				/* CONFIG_LIBIPW_DEBUG */

 static int __init libipw_init(void)
 {
 #ifdef CONFIG_LIBIPW_DEBUG
 	struct proc_dir_entry *e;

 	libipw_debug_level = debug;
 	libipw_proc = proc_mkdir(DRV_PROCNAME, init_net.proc_net);
 	if (libipw_proc == NULL) {
 		LIBIPW_ERROR("Unable to create " DRV_PROCNAME
 				" proc directory\n");
 		return -EIO;
 	}
 	e = proc_create("debug_level", S_IRUGO | S_IWUSR, libipw_proc,
 			&debug_level_proc_fops);
 	if (!e) {
 		remove_proc_entry(DRV_PROCNAME, init_net.proc_net);
 		libipw_proc = NULL;
 		return -EIO;
 	}
 #endif				/* CONFIG_LIBIPW_DEBUG */

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

 	return 0;
 }

 static void __exit libipw_exit(void)
 {
 #ifdef CONFIG_LIBIPW_DEBUG
 	if (libipw_proc) {
 		remove_proc_entry("debug_level", libipw_proc);
 		remove_proc_entry(DRV_PROCNAME, init_net.proc_net);
 		libipw_proc = NULL;
 	}
 #endif				/* CONFIG_LIBIPW_DEBUG */
 }

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

 module_exit(libipw_exit);
 module_init(libipw_init);
	/*******************************************************************************

	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:
	Intel Linux Wireless <ilw@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 "libipw.h"

	#define DRV_DESCRIPTION "802.11 data/management/control stack"
	#define DRV_NAME "libipw"
	#define DRV_PROCNAME "ieee80211"
	#define DRV_VERSION LIBIPW_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 struct cfg80211_ops libipw_config_ops = { };
	static void *libipw_wiphy_privid = &libipw_wiphy_privid;

	static int libipw_networks_allocate(struct libipw_device *ieee)
	{
	int i, j;

	for (i = 0; i < MAX_NETWORK_COUNT; i++) {
	ieee->networks[i] = kzalloc(sizeof(struct libipw_network),
	GFP_KERNEL);
	if (!ieee->networks[i]) {
	LIBIPW_ERROR("Out of memory allocating beacons\n");
	for (j = 0; j < i; j++)
	kfree(ieee->networks[j]);
	return -ENOMEM;
	}
	}

	return 0;
	}

	static inline void libipw_networks_free(struct libipw_device *ieee)
	{
	int i;

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

	void libipw_networks_age(struct libipw_device *ieee,
	unsigned long age_secs)
	{
	struct libipw_network *network = NULL;
	unsigned long flags;
	unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC);

	spin_lock_irqsave(&ieee->lock, flags);
	list_for_each_entry(network, &ieee->network_list, list) {
	network->last_scanned -= age_jiffies;
	}
	spin_unlock_irqrestore(&ieee->lock, flags);
	}
	EXPORT_SYMBOL(libipw_networks_age);

	static void libipw_networks_initialize(struct libipw_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);
	}

	int libipw_change_mtu(struct net_device *dev, int new_mtu)
	{
	if ((new_mtu < 68) \|\| (new_mtu > LIBIPW_DATA_LEN))
	return -EINVAL;
	dev->mtu = new_mtu;
	return 0;
	}
	EXPORT_SYMBOL(libipw_change_mtu);

	struct net_device *alloc_libipw(int sizeof_priv, int monitor)
	{
	struct libipw_device *ieee;
	struct net_device *dev;
	int err;

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

	dev = alloc_etherdev(sizeof(struct libipw_device) + sizeof_priv);
	if (!dev)
	goto failed;

	ieee = netdev_priv(dev);

	ieee->dev = dev;

	if (!monitor) {
	ieee->wdev.wiphy = wiphy_new(&libipw_config_ops, 0);
	if (!ieee->wdev.wiphy) {
	LIBIPW_ERROR("Unable to allocate wiphy.\n");
	goto failed_free_netdev;
	}

	ieee->dev->ieee80211_ptr = &ieee->wdev;
	ieee->wdev.iftype = NL80211_IFTYPE_STATION;

	/* Fill-out wiphy structure bits we know... Not enough info
	here to call set_wiphy_dev or set MAC address or channel info
	-- have to do that in ->ndo_init... */
	ieee->wdev.wiphy->privid = libipw_wiphy_privid;

	ieee->wdev.wiphy->max_scan_ssids = 1;
	ieee->wdev.wiphy->max_scan_ie_len = 0;
	ieee->wdev.wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION)
	\| BIT(NL80211_IFTYPE_ADHOC);
	}

	err = libipw_networks_allocate(ieee);
	if (err) {
	LIBIPW_ERROR("Unable to allocate beacon storage: %d\n", err);
	goto failed_free_wiphy;
	}
	libipw_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 fragmentation 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);

	lib80211_crypt_info_init(&ieee->crypt_info, dev->name, &ieee->lock);

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

	return dev;

	failed_free_wiphy:
	if (!monitor)
	wiphy_free(ieee->wdev.wiphy);
	failed_free_netdev:
	free_netdev(dev);
	failed:
	return NULL;
	}
	EXPORT_SYMBOL(alloc_libipw);

	void free_libipw(struct net_device *dev, int monitor)
	{
	struct libipw_device *ieee = netdev_priv(dev);

	lib80211_crypt_info_free(&ieee->crypt_info);

	libipw_networks_free(ieee);

	/* free cfg80211 resources */
	if (!monitor)
	wiphy_free(ieee->wdev.wiphy);

	free_netdev(dev);
	}
	EXPORT_SYMBOL(free_libipw);

	#ifdef CONFIG_LIBIPW_DEBUG

	static int debug = 0;
	u32 libipw_debug_level = 0;
	EXPORT_SYMBOL_GPL(libipw_debug_level);
	static struct proc_dir_entry *libipw_proc = NULL;

	static int debug_level_proc_show(struct seq_file m, void v)
	{
	seq_printf(m, "0x%08X\n", libipw_debug_level);
	return 0;
	}

	static int debug_level_proc_open(struct inode inode, struct file file)
	{
	return single_open(file, debug_level_proc_show, NULL);
	}

	static ssize_t debug_level_proc_write(struct file *file,
	const char __user buffer, size_t count, loff_t pos)
	{
	char buf[] = "0x00000000\n";
	size_t len = min(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
	libipw_debug_level = val;

	return strnlen(buf, len);
	}

	static const struct file_operations debug_level_proc_fops = {
	.owner = THIS_MODULE,
	.open = debug_level_proc_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.write = debug_level_proc_write,
	};
	#endif /* CONFIG_LIBIPW_DEBUG */

	static int __init libipw_init(void)
	{
	#ifdef CONFIG_LIBIPW_DEBUG
	struct proc_dir_entry *e;

	libipw_debug_level = debug;
	libipw_proc = proc_mkdir(DRV_PROCNAME, init_net.proc_net);
	if (libipw_proc == NULL) {
	LIBIPW_ERROR("Unable to create " DRV_PROCNAME
	" proc directory\n");
	return -EIO;
	}
	e = proc_create("debug_level", S_IRUGO \| S_IWUSR, libipw_proc,
	&debug_level_proc_fops);
	if (!e) {
	remove_proc_entry(DRV_PROCNAME, init_net.proc_net);
	libipw_proc = NULL;
	return -EIO;
	}
	#endif /* CONFIG_LIBIPW_DEBUG */

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

	return 0;
	}

	static void __exit libipw_exit(void)
	{
	#ifdef CONFIG_LIBIPW_DEBUG
	if (libipw_proc) {
	remove_proc_entry("debug_level", libipw_proc);
	remove_proc_entry(DRV_PROCNAME, init_net.proc_net);
	libipw_proc = NULL;
	}
	#endif /* CONFIG_LIBIPW_DEBUG */
	}

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

	module_exit(libipw_exit);
	module_init(libipw_init);