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(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 73 static 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 81 void 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 } 94 EXPORT_SYMBOL(libipw_networks_age); 95 96 static 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 } 106 107 struct 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 info 134 here to call set_wiphy_dev or set MAC address or channel info 135 -- 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 encryption 164 * is enabled. For cards can do hardware encryption, they must do 165 * hardware fragmentation as well. So we don't need a variable 166 * 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; 179 180 failed_free_wiphy: 181 if (!monitor) 182 wiphy_free(ieee->wdev.wiphy); 183 failed_free_netdev: 184 free_netdev(dev); 185 failed: 186 return NULL; 187 } 188 EXPORT_SYMBOL(alloc_libipw); 189 190 void 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 } 204 EXPORT_SYMBOL(free_libipw); 205 206 #ifdef CONFIG_LIBIPW_DEBUG 207 208 static int debug = 0; 209 u32 libipw_debug_level = 0; 210 EXPORT_SYMBOL_GPL(libipw_debug_level); 211 static struct proc_dir_entry *libipw_proc = NULL; 212 213 static 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 } 218 219 static int debug_level_proc_open(struct inode *inode, struct file *file) 220 { 221 return single_open(file, debug_level_proc_show, NULL); 222 } 223 224 static 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_NAME 236 ": %s is not in hex or decimal form.\n", buf); 237 else 238 libipw_debug_level = val; 239 240 return strnlen(buf, len); 241 } 242 243 static const struct file_operations debug_level_proc_fops = { 244 .owner = THIS_MODULE, 245 .open = debug_level_proc_open, 246 .read = seq_read, 247 .llseek = seq_lseek, 248 .release = single_release, 249 .write = debug_level_proc_write, 250 }; 251 #endif /* CONFIG_LIBIPW_DEBUG */ 252 253 static int __init libipw_init(void) 254 { 255 #ifdef CONFIG_LIBIPW_DEBUG 256 struct proc_dir_entry *e; 257 258 libipw_debug_level = debug; 259 libipw_proc = proc_mkdir(DRV_PROCNAME, init_net.proc_net); 260 if (libipw_proc == NULL) { 261 LIBIPW_ERROR("Unable to create " DRV_PROCNAME 262 " proc directory\n"); 263 return -EIO; 264 } 265 e = proc_create("debug_level", 0644, libipw_proc, 266 &debug_level_proc_fops); 267 if (!e) { 268 remove_proc_entry(DRV_PROCNAME, init_net.proc_net); 269 libipw_proc = NULL; 270 return -EIO; 271 } 272 #endif /* CONFIG_LIBIPW_DEBUG */ 273 274 printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n"); 275 printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n"); 276 277 return 0; 278 } 279 280 static void __exit libipw_exit(void) 281 { 282 #ifdef CONFIG_LIBIPW_DEBUG 283 if (libipw_proc) { 284 remove_proc_entry("debug_level", libipw_proc); 285 remove_proc_entry(DRV_PROCNAME, init_net.proc_net); 286 libipw_proc = NULL; 287 } 288 #endif /* CONFIG_LIBIPW_DEBUG */ 289 } 290 291 #ifdef CONFIG_LIBIPW_DEBUG 292 #include <linux/moduleparam.h> 293 module_param(debug, int, 0444); 294 MODULE_PARM_DESC(debug, "debug output mask"); 295 #endif /* CONFIG_LIBIPW_DEBUG */ 296 297 module_exit(libipw_exit); 298 module_init(libipw_init); 299