| /******************************************************************************* |
| |
| 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: |
| 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/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 "ieee80211.h" |
| |
| #define DRV_DESCRIPTION "802.11 data/management/control stack" |
| #define DRV_NAME "ieee80211" |
| #define DRV_VERSION IEEE80211_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 int ieee80211_networks_allocate(struct ieee80211_device *ieee) |
| { |
| if (ieee->networks) |
| return 0; |
| |
| ieee->networks = |
| kzalloc(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; |
| } |
| |
| return 0; |
| } |
| |
| void ieee80211_network_reset(struct ieee80211_network *network) |
| { |
| if (!network) |
| return; |
| |
| if (network->ibss_dfs) { |
| kfree(network->ibss_dfs); |
| network->ibss_dfs = NULL; |
| } |
| } |
| |
| static inline void ieee80211_networks_free(struct ieee80211_device *ieee) |
| { |
| int i; |
| |
| if (!ieee->networks) |
| return; |
| |
| for (i = 0; i < MAX_NETWORK_COUNT; i++) |
| if (ieee->networks[i].ibss_dfs) |
| kfree(ieee->networks[i].ibss_dfs); |
| |
| kfree(ieee->networks); |
| ieee->networks = NULL; |
| } |
| |
| void ieee80211_networks_age(struct ieee80211_device *ieee, |
| unsigned long age_secs) |
| { |
| struct ieee80211_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(ieee80211_networks_age); |
| |
| static 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); |
| } |
| |
| static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
| { |
| if ((new_mtu < 68) || (new_mtu > IEEE80211_DATA_LEN)) |
| return -EINVAL; |
| dev->mtu = new_mtu; |
| return 0; |
| } |
| |
| static struct net_device_stats *ieee80211_generic_get_stats( |
| struct net_device *dev) |
| { |
| struct ieee80211_device *ieee = netdev_priv(dev); |
| return &ieee->stats; |
| } |
| |
| 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 allocate network device.\n"); |
| goto failed; |
| } |
| ieee = netdev_priv(dev); |
| dev->hard_start_xmit = ieee80211_xmit; |
| dev->change_mtu = ieee80211_change_mtu; |
| |
| /* Drivers are free to override this if the generic implementation |
| * does not meet their needs. */ |
| dev->get_stats = ieee80211_generic_get_stats; |
| |
| ieee->dev = dev; |
| |
| err = ieee80211_networks_allocate(ieee); |
| if (err) { |
| IEEE80211_ERROR("Unable to allocate beacon storage: %d\n", err); |
| goto failed_free_netdev; |
| } |
| ieee80211_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 fragementation 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_netdev: |
| free_netdev(dev); |
| failed: |
| return NULL; |
| } |
| |
| void free_ieee80211(struct net_device *dev) |
| { |
| struct ieee80211_device *ieee = netdev_priv(dev); |
| |
| lib80211_crypt_info_free(&ieee->crypt_info); |
| |
| ieee80211_networks_free(ieee); |
| free_netdev(dev); |
| } |
| |
| #ifdef CONFIG_LIBIPW_DEBUG |
| |
| static int debug = 0; |
| u32 ieee80211_debug_level = 0; |
| EXPORT_SYMBOL_GPL(ieee80211_debug_level); |
| static 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\n"; |
| unsigned long len = min((unsigned long)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 |
| ieee80211_debug_level = val; |
| |
| return strnlen(buf, len); |
| } |
| #endif /* CONFIG_LIBIPW_DEBUG */ |
| |
| static int __init ieee80211_init(void) |
| { |
| #ifdef CONFIG_LIBIPW_DEBUG |
| struct proc_dir_entry *e; |
| |
| ieee80211_debug_level = debug; |
| ieee80211_proc = proc_mkdir(DRV_NAME, init_net.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, init_net.proc_net); |
| ieee80211_proc = NULL; |
| return -EIO; |
| } |
| e->read_proc = show_debug_level; |
| e->write_proc = store_debug_level; |
| e->data = NULL; |
| #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 ieee80211_exit(void) |
| { |
| #ifdef CONFIG_LIBIPW_DEBUG |
| if (ieee80211_proc) { |
| remove_proc_entry("debug_level", ieee80211_proc); |
| remove_proc_entry(DRV_NAME, init_net.proc_net); |
| ieee80211_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(ieee80211_exit); |
| module_init(ieee80211_init); |
| |
| EXPORT_SYMBOL(alloc_ieee80211); |
| EXPORT_SYMBOL(free_ieee80211); |