ieee80211_module.c

Go to the documentation of this file.

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

  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
  <[email protected]>
  Copyright (c) 2002-2003, Jouni Malinen <[email protected]>

  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 <[email protected]>
  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/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 <[email protected]>");
MODULE_LICENSE("GPL");

#define DRV_NAME "ieee80211"

static inline int ieee80211_networks_allocate(struct ieee80211_device *ieee)
{
    if (ieee->networks)
        return 0;

    ieee->networks = kcalloc(
        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;
}

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);
}