1 // SPDX-License-Identifier: GPL-2.0-only 2 /******************************************************************************* 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 the 7 Host AP project hostap-drivers v0.1.3 8 Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen 9 <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 97124-6497 16 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_VERSION 45 #define DRV_COPYRIGHT "Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>" 46 47 MODULE_VERSION(DRV_VERSION); 48 MODULE_DESCRIPTION(DRV_DESCRIPTION); 49 MODULE_AUTHOR(DRV_COPYRIGHT); 50 MODULE_LICENSE("GPL"); 51 52 static struct cfg80211_ops libipw_config_ops = { }; 53 static void *libipw_wiphy_privid = &libipw_wiphy_privid; 54 55 static 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_obj(struct libipw_network); 61 if (!ieee->networks[i]) { 62 LIBIPW_ERROR("Out of memory allocating beacons\n"); 63 for (j = 0; j < i; j++) 64 kfree(ieee->networks[j]); 65 return -ENOMEM; 66 } 67 } 68 69 return 0; 70 } 71 72 static inline void libipw_networks_free(struct libipw_device *ieee) 73 { 74 int i; 75 76 for (i = 0; i < MAX_NETWORK_COUNT; i++) 77 kfree(ieee->networks[i]); 78 } 79 80 void libipw_networks_age(struct libipw_device *ieee, 81 unsigned long age_secs) 82 { 83 struct libipw_network *network = NULL; 84 unsigned long flags; 85 unsigned long age_jiffies = secs_to_jiffies(age_secs); 86 87 spin_lock_irqsave(&ieee->lock, flags); 88 list_for_each_entry(network, &ieee->network_list, list) { 89 network->last_scanned -= age_jiffies; 90 } 91 spin_unlock_irqrestore(&ieee->lock, flags); 92 } 93 EXPORT_SYMBOL(libipw_networks_age); 94 95 static void libipw_networks_initialize(struct libipw_device *ieee) 96 { 97 int i; 98 99 INIT_LIST_HEAD(&ieee->network_free_list); 100 INIT_LIST_HEAD(&ieee->network_list); 101 for (i = 0; i < MAX_NETWORK_COUNT; i++) 102 list_add_tail(&ieee->networks[i]->list, 103 &ieee->network_free_list); 104 } 105 106 struct net_device *alloc_libipw(int sizeof_priv, int monitor) 107 { 108 struct libipw_device *ieee; 109 struct net_device *dev; 110 int err; 111 112 LIBIPW_DEBUG_INFO("Initializing...\n"); 113 114 dev = alloc_etherdev(sizeof(struct libipw_device) + sizeof_priv); 115 if (!dev) 116 goto failed; 117 118 ieee = netdev_priv(dev); 119 120 ieee->dev = dev; 121 122 if (!monitor) { 123 ieee->wdev.wiphy = wiphy_new(&libipw_config_ops, 0); 124 if (!ieee->wdev.wiphy) { 125 LIBIPW_ERROR("Unable to allocate wiphy.\n"); 126 goto failed_free_netdev; 127 } 128 129 ieee->dev->ieee80211_ptr = &ieee->wdev; 130 ieee->wdev.iftype = NL80211_IFTYPE_STATION; 131 132 /* Fill-out wiphy structure bits we know... Not enough info 133 here to call set_wiphy_dev or set MAC address or channel info 134 -- have to do that in ->ndo_init... */ 135 ieee->wdev.wiphy->privid = libipw_wiphy_privid; 136 137 ieee->wdev.wiphy->max_scan_ssids = 1; 138 ieee->wdev.wiphy->max_scan_ie_len = 0; 139 ieee->wdev.wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) 140 | BIT(NL80211_IFTYPE_ADHOC); 141 } 142 143 err = libipw_networks_allocate(ieee); 144 if (err) { 145 LIBIPW_ERROR("Unable to allocate beacon storage: %d\n", err); 146 goto failed_free_wiphy; 147 } 148 libipw_networks_initialize(ieee); 149 150 /* Default fragmentation threshold is maximum payload size */ 151 ieee->fts = DEFAULT_FTS; 152 ieee->rts = DEFAULT_FTS; 153 ieee->scan_age = DEFAULT_MAX_SCAN_AGE; 154 ieee->open_wep = 1; 155 156 /* Default to enabling full open WEP with host based encrypt/decrypt */ 157 ieee->host_encrypt = 1; 158 ieee->host_decrypt = 1; 159 ieee->host_mc_decrypt = 1; 160 161 /* Host fragmentation in Open mode. Default is enabled. 162 * Note: host fragmentation is always enabled if host encryption 163 * is enabled. For cards can do hardware encryption, they must do 164 * hardware fragmentation as well. So we don't need a variable 165 * like host_enc_frag. */ 166 ieee->host_open_frag = 1; 167 ieee->ieee802_1x = 1; /* Default to supporting 802.1x */ 168 169 spin_lock_init(&ieee->lock); 170 171 libipw_crypt_info_init(&ieee->crypt_info, dev->name, &ieee->lock); 172 173 ieee->wpa_enabled = 0; 174 ieee->drop_unencrypted = 0; 175 ieee->privacy_invoked = 0; 176 177 return dev; 178 179 failed_free_wiphy: 180 if (!monitor) 181 wiphy_free(ieee->wdev.wiphy); 182 failed_free_netdev: 183 free_netdev(dev); 184 failed: 185 return NULL; 186 } 187 EXPORT_SYMBOL(alloc_libipw); 188 189 void free_libipw(struct net_device *dev, int monitor) 190 { 191 struct libipw_device *ieee = netdev_priv(dev); 192 193 libipw_crypt_info_free(&ieee->crypt_info); 194 195 libipw_networks_free(ieee); 196 197 /* free cfg80211 resources */ 198 if (!monitor) 199 wiphy_free(ieee->wdev.wiphy); 200 201 free_netdev(dev); 202 } 203 EXPORT_SYMBOL(free_libipw); 204 205 #ifdef CONFIG_LIBIPW_DEBUG 206 207 static int debug = 0; 208 u32 libipw_debug_level = 0; 209 EXPORT_SYMBOL_GPL(libipw_debug_level); 210 static struct proc_dir_entry *libipw_proc = NULL; 211 212 static int debug_level_proc_show(struct seq_file *m, void *v) 213 { 214 seq_printf(m, "0x%08X\n", libipw_debug_level); 215 return 0; 216 } 217 218 static int debug_level_proc_open(struct inode *inode, struct file *file) 219 { 220 return single_open(file, debug_level_proc_show, NULL); 221 } 222 223 static ssize_t debug_level_proc_write(struct file *file, 224 const char __user *buffer, size_t count, loff_t *pos) 225 { 226 char buf[] = "0x00000000\n"; 227 size_t len = min(sizeof(buf) - 1, count); 228 unsigned long val; 229 230 if (copy_from_user(buf, buffer, len)) 231 return count; 232 buf[len] = 0; 233 if (sscanf(buf, "%li", &val) != 1) 234 printk(KERN_INFO DRV_NAME 235 ": %s is not in hex or decimal form.\n", buf); 236 else 237 libipw_debug_level = val; 238 239 return strnlen(buf, len); 240 } 241 242 static const struct proc_ops debug_level_proc_ops = { 243 .proc_open = debug_level_proc_open, 244 .proc_read = seq_read, 245 .proc_lseek = seq_lseek, 246 .proc_release = single_release, 247 .proc_write = debug_level_proc_write, 248 }; 249 #endif /* CONFIG_LIBIPW_DEBUG */ 250 251 static int __init libipw_init(void) 252 { 253 int err; 254 #ifdef CONFIG_LIBIPW_DEBUG 255 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_PROCNAME 261 " 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 err = libipw_crypto_init(); 277 if (err) 278 goto remove_debugfs; 279 err = libipw_crypto_ccmp_init(); 280 if (err) 281 goto uninit_crypto; 282 err = libipw_crypto_tkip_init(); 283 if (err) 284 goto uninit_crypto_ccmp; 285 err = libipw_crypto_wep_init(); 286 if (err) 287 goto uninit_crypto_tkip; 288 289 return 0; 290 uninit_crypto_tkip: 291 libipw_crypto_tkip_exit(); 292 uninit_crypto_ccmp: 293 libipw_crypto_ccmp_exit(); 294 uninit_crypto: 295 libipw_crypto_exit(); 296 remove_debugfs: 297 #ifdef CONFIG_LIBIPW_DEBUG 298 remove_proc_entry("debug_level", libipw_proc); 299 remove_proc_entry(DRV_PROCNAME, init_net.proc_net); 300 libipw_proc = NULL; 301 #endif 302 return err; 303 } 304 305 static void __exit libipw_exit(void) 306 { 307 #ifdef CONFIG_LIBIPW_DEBUG 308 if (libipw_proc) { 309 remove_proc_entry("debug_level", libipw_proc); 310 remove_proc_entry(DRV_PROCNAME, init_net.proc_net); 311 libipw_proc = NULL; 312 } 313 #endif /* CONFIG_LIBIPW_DEBUG */ 314 315 libipw_crypto_ccmp_exit(); 316 libipw_crypto_tkip_exit(); 317 libipw_crypto_wep_exit(); 318 libipw_crypto_exit(); 319 } 320 321 #ifdef CONFIG_LIBIPW_DEBUG 322 #include <linux/moduleparam.h> 323 module_param(debug, int, 0444); 324 MODULE_PARM_DESC(debug, "debug output mask"); 325 #endif /* CONFIG_LIBIPW_DEBUG */ 326 327 module_exit(libipw_exit); 328 module_init(libipw_init); 329