/******************************************************************************* 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 <jkmaline@cc.hut.fi> Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.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/arp.h> #include <net/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; } 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 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; } 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 */ INIT_LIST_HEAD(&ieee->crypt_deinit_list); init_timer(&ieee->crypt_deinit_timer); ieee->crypt_deinit_timer.data = (unsigned long)ieee; ieee->crypt_deinit_timer.function = ieee80211_crypt_deinit_handler; ieee->crypt_quiesced = 0; spin_lock_init(&ieee->lock); ieee->wpa_enabled = 0; ieee->drop_unencrypted = 0; ieee->privacy_invoked = 0; return dev; failed: if (dev) free_netdev(dev); return NULL; } void free_ieee80211(struct net_device *dev) { struct ieee80211_device *ieee = netdev_priv(dev); int i; ieee80211_crypt_quiescing(ieee); del_timer_sync(&ieee->crypt_deinit_timer); ieee80211_crypt_deinit_entries(ieee, 1); for (i = 0; i < WEP_KEYS; i++) { struct ieee80211_crypt_data *crypt = ieee->crypt[i]; if (crypt) { if (crypt->ops) { crypt->ops->deinit(crypt->priv); module_put(crypt->ops->owner); } kfree(crypt); ieee->crypt[i] = NULL; } } ieee80211_networks_free(ieee); free_netdev(dev); } #ifdef CONFIG_IEEE80211_DEBUG static int debug = 0; u32 ieee80211_debug_level = 0; 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_IEEE80211_DEBUG */ static int __init ieee80211_init(void) { #ifdef CONFIG_IEEE80211_DEBUG struct proc_dir_entry *e; ieee80211_debug_level = debug; ieee80211_proc = proc_mkdir(DRV_NAME, 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, proc_net); ieee80211_proc = NULL; return -EIO; } e->read_proc = show_debug_level; e->write_proc = store_debug_level; e->data = NULL; #endif /* CONFIG_IEEE80211_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_IEEE80211_DEBUG if (ieee80211_proc) { remove_proc_entry("debug_level", ieee80211_proc); remove_proc_entry(DRV_NAME, proc_net); ieee80211_proc = NULL; } #endif /* CONFIG_IEEE80211_DEBUG */ } #ifdef CONFIG_IEEE80211_DEBUG #include <linux/moduleparam.h> module_param(debug, int, 0444); MODULE_PARM_DESC(debug, "debug output mask"); #endif /* CONFIG_IEEE80211_DEBUG */ module_exit(ieee80211_exit); module_init(ieee80211_init); const char *escape_essid(const char *essid, u8 essid_len) { static char escaped[IW_ESSID_MAX_SIZE * 2 + 1]; const char *s = essid; char *d = escaped; if (ieee80211_is_empty_essid(essid, essid_len)) { memcpy(escaped, "<hidden>", sizeof("<hidden>")); return escaped; } essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE); while (essid_len--) { if (*s == '\0') { *d++ = '\\'; *d++ = '0'; s++; } else { *d++ = *s++; } } *d = '\0'; return escaped; } EXPORT_SYMBOL(alloc_ieee80211); EXPORT_SYMBOL(free_ieee80211); EXPORT_SYMBOL(escape_essid);