[NET] ieee80211 subsystem

Contributors:
Host AP contributors
James Ketrenos <jketreno@linux.intel.com>
Francois Romieu <romieu@fr.zoreil.com>
Adrian Bunk <bunk@stusta.de>
Matthew Galgoci <mgalgoci@parcelfarce.linux.th
eplanet.co.uk>

1 files changed, 268 insertions, 0 deletions

diff --git a/net/ieee80211/ieee80211_module.c b/net/ieee80211/ieee80211_module.c
new file mode 100644
index 000000000000..e4ca0daaaeea
--- /dev/null
+++ b/net/ieee80211/ieee80211_module.c
@@ -0,0 +1,268 @@
+/*******************************************************************************
+
+  Copyright(c) 2004 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/config.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/pci.h>
+#include <linux/proc_fs.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/tcp.h>
+#include <linux/types.h>
+#include <linux/version.h>
+#include <linux/wireless.h>
+#include <linux/etherdevice.h>
+#include <asm/uaccess.h>
+#include <net/arp.h>
+
+#include <net/ieee80211.h>
+
+MODULE_DESCRIPTION("802.11 data/management/control stack");
+MODULE_AUTHOR("Copyright (C) 2004 Intel Corporation <jketreno@linux.intel.com>");
+MODULE_LICENSE("GPL");
+
+#define DRV_NAME "ieee80211"
+
+static inline int ieee80211_networks_allocate(struct ieee80211_device *ieee)
+{
+        if (ieee->networks)
+                return 0;
+
+        ieee->networks = kmalloc(
+                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;
+        }
+
+        memset(ieee->networks, 0,
+               MAX_NETWORK_COUNT * sizeof(struct ieee80211_network));
+
+        return 0;
+}
+
+static inline void ieee80211_networks_free(struct ieee80211_device *ieee)
+{
+        if (!ieee->networks)
+                return;
+        kfree(ieee->networks);
+        ieee->networks = NULL;
+}
+
+static inline 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);
+}
+
+
+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;
+
+        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->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->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;
+
+        spin_lock_init(&ieee->lock);
+
+        ieee->wpa_enabled = 0;
+        ieee->tkip_countermeasures = 0;
+        ieee->drop_unencrypted = 0;
+        ieee->privacy_invoked = 0;
+        ieee->ieee802_1x = 1;
+
+        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;
+
+        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;
+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 *buffer,
+                             unsigned long count, void *data)
+{
+        char buf[] = "0x00000000";
+        unsigned long len = min(sizeof(buf) - 1, (u32)count);
+        char *p = (char *)buf;
+        unsigned long val;
+
+        if (copy_from_user(buf, buffer, len))
+                return count;
+        buf[len] = 0;
+        if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
+                p++;
+                if (p[0] == 'x' || p[0] == 'X')
+                        p++;
+                val = simple_strtoul(p, &p, 16);
+        } else
+                val = simple_strtoul(p, &p, 10);
+        if (p == buf)
+                printk(KERN_INFO DRV_NAME
+                       ": %s is not in hex or decimal form.\n", buf);
+        else
+                ieee80211_debug_level = val;
+
+        return strnlen(buf, count);
+}
+
+static int __init ieee80211_init(void)
+{
+        struct proc_dir_entry *e;
+
+        ieee80211_debug_level = debug;
+        ieee80211_proc = create_proc_entry(DRV_NAME, S_IFDIR, 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;
+
+        return 0;
+}
+
+static void __exit ieee80211_exit(void)
+{
+        if (ieee80211_proc) {
+                remove_proc_entry("debug_level", ieee80211_proc);
+                remove_proc_entry(DRV_NAME, proc_net);
+                ieee80211_proc = NULL;
+        }
+}
+
+#include <linux/moduleparam.h>
+module_param(debug, int, 0444);
+MODULE_PARM_DESC(debug, "debug output mask");
+
+
+module_exit(ieee80211_exit);
+module_init(ieee80211_init);
+#endif
+
+EXPORT_SYMBOL(alloc_ieee80211);
+EXPORT_SYMBOL(free_ieee80211);