/*******************************************************************************

  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/net_namespace.h>

#include "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 i,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);

        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);
        spin_lock_init(&ieee->wpax_suitlist_lock);

        ieee->wpax_type_set = 0;
        ieee->wpa_enabled = 0;
        ieee->tkip_countermeasures = 0;
        ieee->drop_unencrypted = 0;
        ieee->privacy_invoked = 0;
        ieee->ieee802_1x = 1;
        ieee->raw_tx = 0;

        ieee80211_softmac_init(ieee);

        for (i = 0; i < IEEE_IBSS_MAC_HASH_SIZE; i++)
                INIT_LIST_HEAD(&ieee->ibss_mac_hash[i]);

        for (i = 0; i < 17; i++) {
          ieee->last_rxseq_num[i] = -1;
          ieee->last_rxfrag_num[i] = -1;
          ieee->last_packet_time[i] = 0;
        }
//These function were added to load crypte module autoly
        ieee80211_tkip_null();
        ieee80211_wep_null();
        ieee80211_ccmp_null();
        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;
        struct list_head *p, *q;


        ieee80211_softmac_free(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);
                        kfree(crypt);
                        ieee->crypt[i] = NULL;
                }
        }

        ieee80211_networks_free(ieee);

        for (i = 0; i < IEEE_IBSS_MAC_HASH_SIZE; i++) {
                list_for_each_safe(p, q, &ieee->ibss_mac_hash[i]) {
                        kfree(list_entry(p, struct ieee_ibss_seq, list));
                        list_del(p);
                }
        }


        free_netdev(dev);
}