forked from Minki/linux
304 lines
7.9 KiB
C
304 lines
7.9 KiB
C
/*******************************************************************************
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Copyright(c) 2004-2005 Intel Corporation. All rights reserved.
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Portions of this file are based on the WEP enablement code provided by the
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Host AP project hostap-drivers v0.1.3
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Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
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<jkmaline@cc.hut.fi>
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Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
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This program is free software; you can redistribute it and/or modify it
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under the terms of version 2 of the GNU General Public License as
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59
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Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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The full GNU General Public License is included in this distribution in the
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file called LICENSE.
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Contact Information:
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James P. Ketrenos <ipw2100-admin@linux.intel.com>
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Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*******************************************************************************/
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#include <linux/compiler.h>
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#include <linux/config.h>
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#include <linux/errno.h>
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#include <linux/if_arp.h>
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#include <linux/in6.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/proc_fs.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <linux/tcp.h>
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#include <linux/types.h>
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#include <linux/wireless.h>
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#include <linux/etherdevice.h>
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#include <asm/uaccess.h>
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#include <net/arp.h>
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#include <net/ieee80211.h>
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#define DRV_DESCRIPTION "802.11 data/management/control stack"
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#define DRV_NAME "ieee80211"
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#define DRV_VERSION IEEE80211_VERSION
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#define DRV_COPYRIGHT "Copyright (C) 2004-2005 Intel Corporation <jketreno@linux.intel.com>"
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MODULE_VERSION(DRV_VERSION);
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MODULE_DESCRIPTION(DRV_DESCRIPTION);
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MODULE_AUTHOR(DRV_COPYRIGHT);
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MODULE_LICENSE("GPL");
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static inline int ieee80211_networks_allocate(struct ieee80211_device *ieee)
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{
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if (ieee->networks)
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return 0;
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ieee->networks =
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kmalloc(MAX_NETWORK_COUNT * sizeof(struct ieee80211_network),
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GFP_KERNEL);
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if (!ieee->networks) {
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printk(KERN_WARNING "%s: Out of memory allocating beacons\n",
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ieee->dev->name);
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return -ENOMEM;
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}
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memset(ieee->networks, 0,
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MAX_NETWORK_COUNT * sizeof(struct ieee80211_network));
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return 0;
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}
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static inline void ieee80211_networks_free(struct ieee80211_device *ieee)
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{
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if (!ieee->networks)
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return;
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kfree(ieee->networks);
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ieee->networks = NULL;
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}
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static inline void ieee80211_networks_initialize(struct ieee80211_device *ieee)
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{
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int i;
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INIT_LIST_HEAD(&ieee->network_free_list);
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INIT_LIST_HEAD(&ieee->network_list);
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for (i = 0; i < MAX_NETWORK_COUNT; i++)
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list_add_tail(&ieee->networks[i].list,
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&ieee->network_free_list);
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}
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struct net_device *alloc_ieee80211(int sizeof_priv)
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{
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struct ieee80211_device *ieee;
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struct net_device *dev;
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int err;
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IEEE80211_DEBUG_INFO("Initializing...\n");
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dev = alloc_etherdev(sizeof(struct ieee80211_device) + sizeof_priv);
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if (!dev) {
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IEEE80211_ERROR("Unable to network device.\n");
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goto failed;
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}
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ieee = netdev_priv(dev);
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dev->hard_start_xmit = ieee80211_xmit;
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ieee->dev = dev;
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err = ieee80211_networks_allocate(ieee);
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if (err) {
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IEEE80211_ERROR("Unable to allocate beacon storage: %d\n", err);
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goto failed;
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}
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ieee80211_networks_initialize(ieee);
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/* Default fragmentation threshold is maximum payload size */
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ieee->fts = DEFAULT_FTS;
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ieee->rts = DEFAULT_FTS;
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ieee->scan_age = DEFAULT_MAX_SCAN_AGE;
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ieee->open_wep = 1;
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/* Default to enabling full open WEP with host based encrypt/decrypt */
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ieee->host_encrypt = 1;
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ieee->host_decrypt = 1;
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ieee->host_mc_decrypt = 1;
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/* Host fragementation in Open mode. Default is enabled.
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* Note: host fragmentation is always enabled if host encryption
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* is enabled. For cards can do hardware encryption, they must do
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* hardware fragmentation as well. So we don't need a variable
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* like host_enc_frag. */
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ieee->host_open_frag = 1;
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ieee->ieee802_1x = 1; /* Default to supporting 802.1x */
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INIT_LIST_HEAD(&ieee->crypt_deinit_list);
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init_timer(&ieee->crypt_deinit_timer);
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ieee->crypt_deinit_timer.data = (unsigned long)ieee;
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ieee->crypt_deinit_timer.function = ieee80211_crypt_deinit_handler;
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ieee->crypt_quiesced = 0;
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spin_lock_init(&ieee->lock);
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ieee->wpa_enabled = 0;
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ieee->drop_unencrypted = 0;
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ieee->privacy_invoked = 0;
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return dev;
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failed:
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if (dev)
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free_netdev(dev);
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return NULL;
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}
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void free_ieee80211(struct net_device *dev)
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{
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struct ieee80211_device *ieee = netdev_priv(dev);
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int i;
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ieee80211_crypt_quiescing(ieee);
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del_timer_sync(&ieee->crypt_deinit_timer);
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ieee80211_crypt_deinit_entries(ieee, 1);
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for (i = 0; i < WEP_KEYS; i++) {
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struct ieee80211_crypt_data *crypt = ieee->crypt[i];
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if (crypt) {
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if (crypt->ops) {
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crypt->ops->deinit(crypt->priv);
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module_put(crypt->ops->owner);
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}
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kfree(crypt);
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ieee->crypt[i] = NULL;
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}
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}
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ieee80211_networks_free(ieee);
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free_netdev(dev);
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}
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#ifdef CONFIG_IEEE80211_DEBUG
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static int debug = 0;
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u32 ieee80211_debug_level = 0;
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struct proc_dir_entry *ieee80211_proc = NULL;
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static int show_debug_level(char *page, char **start, off_t offset,
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int count, int *eof, void *data)
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{
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return snprintf(page, count, "0x%08X\n", ieee80211_debug_level);
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}
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static int store_debug_level(struct file *file, const char __user * buffer,
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unsigned long count, void *data)
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{
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char buf[] = "0x00000000\n";
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unsigned long len = min((unsigned long)sizeof(buf) - 1, count);
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unsigned long val;
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if (copy_from_user(buf, buffer, len))
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return count;
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buf[len] = 0;
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if (sscanf(buf, "%li", &val) != 1)
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printk(KERN_INFO DRV_NAME
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": %s is not in hex or decimal form.\n", buf);
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else
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ieee80211_debug_level = val;
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return strnlen(buf, len);
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}
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#endif /* CONFIG_IEEE80211_DEBUG */
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static int __init ieee80211_init(void)
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{
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#ifdef CONFIG_IEEE80211_DEBUG
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struct proc_dir_entry *e;
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ieee80211_debug_level = debug;
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ieee80211_proc = proc_mkdir(DRV_NAME, proc_net);
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if (ieee80211_proc == NULL) {
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IEEE80211_ERROR("Unable to create " DRV_NAME
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" proc directory\n");
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return -EIO;
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}
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e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
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ieee80211_proc);
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if (!e) {
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remove_proc_entry(DRV_NAME, proc_net);
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ieee80211_proc = NULL;
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return -EIO;
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}
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e->read_proc = show_debug_level;
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e->write_proc = store_debug_level;
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e->data = NULL;
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#endif /* CONFIG_IEEE80211_DEBUG */
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printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
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printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
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return 0;
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}
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static void __exit ieee80211_exit(void)
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{
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#ifdef CONFIG_IEEE80211_DEBUG
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if (ieee80211_proc) {
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remove_proc_entry("debug_level", ieee80211_proc);
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remove_proc_entry(DRV_NAME, proc_net);
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ieee80211_proc = NULL;
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}
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#endif /* CONFIG_IEEE80211_DEBUG */
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}
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#ifdef CONFIG_IEEE80211_DEBUG
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#include <linux/moduleparam.h>
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module_param(debug, int, 0444);
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MODULE_PARM_DESC(debug, "debug output mask");
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#endif /* CONFIG_IEEE80211_DEBUG */
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module_exit(ieee80211_exit);
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module_init(ieee80211_init);
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const char *escape_essid(const char *essid, u8 essid_len)
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{
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static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
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const char *s = essid;
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char *d = escaped;
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if (ieee80211_is_empty_essid(essid, essid_len)) {
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memcpy(escaped, "<hidden>", sizeof("<hidden>"));
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return escaped;
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}
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essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
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while (essid_len--) {
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if (*s == '\0') {
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*d++ = '\\';
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*d++ = '0';
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s++;
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} else {
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*d++ = *s++;
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}
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}
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*d = '\0';
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return escaped;
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}
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EXPORT_SYMBOL(alloc_ieee80211);
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EXPORT_SYMBOL(free_ieee80211);
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EXPORT_SYMBOL(escape_essid);
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