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1// SPDX-License-Identifier: GPL-2.0-only2/*******************************************************************************3 4 Copyright(c) 2004-2005 Intel Corporation. All rights reserved.5 6 Portions of this file are based on the WEP enablement code provided by the7 Host AP project hostap-drivers v0.1.38 Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen9 <j@w1.fi>10 Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>11 12 13 Contact Information:14 Intel Linux Wireless <ilw@linux.intel.com>15 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-649716 17*******************************************************************************/18 19#include <linux/compiler.h>20#include <linux/errno.h>21#include <linux/if_arp.h>22#include <linux/in6.h>23#include <linux/in.h>24#include <linux/ip.h>25#include <linux/kernel.h>26#include <linux/module.h>27#include <linux/netdevice.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/net_namespace.h>37#include <net/arp.h>38 39#include "libipw.h"40 41#define DRV_DESCRIPTION "802.11 data/management/control stack"42#define DRV_NAME "libipw"43#define DRV_PROCNAME "ieee80211"44#define DRV_VERSION LIBIPW_VERSION45#define DRV_COPYRIGHT "Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>"46 47MODULE_VERSION(DRV_VERSION);48MODULE_DESCRIPTION(DRV_DESCRIPTION);49MODULE_AUTHOR(DRV_COPYRIGHT);50MODULE_LICENSE("GPL");51 52static struct cfg80211_ops libipw_config_ops = { };53static void *libipw_wiphy_privid = &libipw_wiphy_privid;54 55static int libipw_networks_allocate(struct libipw_device *ieee)56{57 int i, j;58 59 for (i = 0; i < MAX_NETWORK_COUNT; i++) {60 ieee->networks[i] = kzalloc(sizeof(struct libipw_network),61 GFP_KERNEL);62 if (!ieee->networks[i]) {63 LIBIPW_ERROR("Out of memory allocating beacons\n");64 for (j = 0; j < i; j++)65 kfree(ieee->networks[j]);66 return -ENOMEM;67 }68 }69 70 return 0;71}72 73static inline void libipw_networks_free(struct libipw_device *ieee)74{75 int i;76 77 for (i = 0; i < MAX_NETWORK_COUNT; i++)78 kfree(ieee->networks[i]);79}80 81void libipw_networks_age(struct libipw_device *ieee,82 unsigned long age_secs)83{84 struct libipw_network *network = NULL;85 unsigned long flags;86 unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC);87 88 spin_lock_irqsave(&ieee->lock, flags);89 list_for_each_entry(network, &ieee->network_list, list) {90 network->last_scanned -= age_jiffies;91 }92 spin_unlock_irqrestore(&ieee->lock, flags);93}94EXPORT_SYMBOL(libipw_networks_age);95 96static void libipw_networks_initialize(struct libipw_device *ieee)97{98 int i;99 100 INIT_LIST_HEAD(&ieee->network_free_list);101 INIT_LIST_HEAD(&ieee->network_list);102 for (i = 0; i < MAX_NETWORK_COUNT; i++)103 list_add_tail(&ieee->networks[i]->list,104 &ieee->network_free_list);105}106 107struct net_device *alloc_libipw(int sizeof_priv, int monitor)108{109 struct libipw_device *ieee;110 struct net_device *dev;111 int err;112 113 LIBIPW_DEBUG_INFO("Initializing...\n");114 115 dev = alloc_etherdev(sizeof(struct libipw_device) + sizeof_priv);116 if (!dev)117 goto failed;118 119 ieee = netdev_priv(dev);120 121 ieee->dev = dev;122 123 if (!monitor) {124 ieee->wdev.wiphy = wiphy_new(&libipw_config_ops, 0);125 if (!ieee->wdev.wiphy) {126 LIBIPW_ERROR("Unable to allocate wiphy.\n");127 goto failed_free_netdev;128 }129 130 ieee->dev->ieee80211_ptr = &ieee->wdev;131 ieee->wdev.iftype = NL80211_IFTYPE_STATION;132 133 /* Fill-out wiphy structure bits we know... Not enough info134 here to call set_wiphy_dev or set MAC address or channel info135 -- have to do that in ->ndo_init... */136 ieee->wdev.wiphy->privid = libipw_wiphy_privid;137 138 ieee->wdev.wiphy->max_scan_ssids = 1;139 ieee->wdev.wiphy->max_scan_ie_len = 0;140 ieee->wdev.wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION)141 | BIT(NL80211_IFTYPE_ADHOC);142 }143 144 err = libipw_networks_allocate(ieee);145 if (err) {146 LIBIPW_ERROR("Unable to allocate beacon storage: %d\n", err);147 goto failed_free_wiphy;148 }149 libipw_networks_initialize(ieee);150 151 /* Default fragmentation threshold is maximum payload size */152 ieee->fts = DEFAULT_FTS;153 ieee->rts = DEFAULT_FTS;154 ieee->scan_age = DEFAULT_MAX_SCAN_AGE;155 ieee->open_wep = 1;156 157 /* Default to enabling full open WEP with host based encrypt/decrypt */158 ieee->host_encrypt = 1;159 ieee->host_decrypt = 1;160 ieee->host_mc_decrypt = 1;161 162 /* Host fragmentation in Open mode. Default is enabled.163 * Note: host fragmentation is always enabled if host encryption164 * is enabled. For cards can do hardware encryption, they must do165 * hardware fragmentation as well. So we don't need a variable166 * like host_enc_frag. */167 ieee->host_open_frag = 1;168 ieee->ieee802_1x = 1; /* Default to supporting 802.1x */169 170 spin_lock_init(&ieee->lock);171 172 lib80211_crypt_info_init(&ieee->crypt_info, dev->name, &ieee->lock);173 174 ieee->wpa_enabled = 0;175 ieee->drop_unencrypted = 0;176 ieee->privacy_invoked = 0;177 178 return dev;179 180failed_free_wiphy:181 if (!monitor)182 wiphy_free(ieee->wdev.wiphy);183failed_free_netdev:184 free_netdev(dev);185failed:186 return NULL;187}188EXPORT_SYMBOL(alloc_libipw);189 190void free_libipw(struct net_device *dev, int monitor)191{192 struct libipw_device *ieee = netdev_priv(dev);193 194 lib80211_crypt_info_free(&ieee->crypt_info);195 196 libipw_networks_free(ieee);197 198 /* free cfg80211 resources */199 if (!monitor)200 wiphy_free(ieee->wdev.wiphy);201 202 free_netdev(dev);203}204EXPORT_SYMBOL(free_libipw);205 206#ifdef CONFIG_LIBIPW_DEBUG207 208static int debug = 0;209u32 libipw_debug_level = 0;210EXPORT_SYMBOL_GPL(libipw_debug_level);211static struct proc_dir_entry *libipw_proc = NULL;212 213static int debug_level_proc_show(struct seq_file *m, void *v)214{215 seq_printf(m, "0x%08X\n", libipw_debug_level);216 return 0;217}218 219static int debug_level_proc_open(struct inode *inode, struct file *file)220{221 return single_open(file, debug_level_proc_show, NULL);222}223 224static ssize_t debug_level_proc_write(struct file *file,225 const char __user *buffer, size_t count, loff_t *pos)226{227 char buf[] = "0x00000000\n";228 size_t len = min(sizeof(buf) - 1, count);229 unsigned long val;230 231 if (copy_from_user(buf, buffer, len))232 return count;233 buf[len] = 0;234 if (sscanf(buf, "%li", &val) != 1)235 printk(KERN_INFO DRV_NAME236 ": %s is not in hex or decimal form.\n", buf);237 else238 libipw_debug_level = val;239 240 return strnlen(buf, len);241}242 243static const struct proc_ops debug_level_proc_ops = {244 .proc_open = debug_level_proc_open,245 .proc_read = seq_read,246 .proc_lseek = seq_lseek,247 .proc_release = single_release,248 .proc_write = debug_level_proc_write,249};250#endif /* CONFIG_LIBIPW_DEBUG */251 252static int __init libipw_init(void)253{254#ifdef CONFIG_LIBIPW_DEBUG255 struct proc_dir_entry *e;256 257 libipw_debug_level = debug;258 libipw_proc = proc_mkdir(DRV_PROCNAME, init_net.proc_net);259 if (libipw_proc == NULL) {260 LIBIPW_ERROR("Unable to create " DRV_PROCNAME261 " proc directory\n");262 return -EIO;263 }264 e = proc_create("debug_level", 0644, libipw_proc,265 &debug_level_proc_ops);266 if (!e) {267 remove_proc_entry(DRV_PROCNAME, init_net.proc_net);268 libipw_proc = NULL;269 return -EIO;270 }271#endif /* CONFIG_LIBIPW_DEBUG */272 273 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");274 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");275 276 return 0;277}278 279static void __exit libipw_exit(void)280{281#ifdef CONFIG_LIBIPW_DEBUG282 if (libipw_proc) {283 remove_proc_entry("debug_level", libipw_proc);284 remove_proc_entry(DRV_PROCNAME, init_net.proc_net);285 libipw_proc = NULL;286 }287#endif /* CONFIG_LIBIPW_DEBUG */288}289 290#ifdef CONFIG_LIBIPW_DEBUG291#include <linux/moduleparam.h>292module_param(debug, int, 0444);293MODULE_PARM_DESC(debug, "debug output mask");294#endif /* CONFIG_LIBIPW_DEBUG */295 296module_exit(libipw_exit);297module_init(libipw_init);298