rtllib_module.c

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

  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/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 <linux/uaccess.h>
#include <net/arp.h>

#include "rtllib.h"


u32 rt_global_debug_component = COMP_ERR;
EXPORT_SYMBOL(rt_global_debug_component);


void _setup_timer(struct timer_list *ptimer, void *fun, unsigned long data)
{
    ptimer->function = fun;
    ptimer->data = data;
    init_timer(ptimer);
}

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

    ieee->networks = kzalloc(
        MAX_NETWORK_COUNT * sizeof(struct rtllib_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 rtllib_networks_free(struct rtllib_device *ieee)
{
    if (!ieee->networks)
        return;
    kfree(ieee->networks);
    ieee->networks = NULL;
}

static inline void rtllib_networks_initialize(struct rtllib_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_rtllib(int sizeof_priv)
{
    struct rtllib_device *ieee = NULL;
    struct net_device *dev;
    int i, err;

    RTLLIB_DEBUG_INFO("Initializing...\n");

    dev = alloc_etherdev(sizeof(struct rtllib_device) + sizeof_priv);
    if (!dev) {
        RTLLIB_ERROR("Unable to network device.\n");
        goto failed;
    }
    ieee = (struct rtllib_device *)netdev_priv_rsl(dev);
    memset(ieee, 0, sizeof(struct rtllib_device)+sizeof_priv);
    ieee->dev = dev;

    err = rtllib_networks_allocate(ieee);
    if (err) {
        RTLLIB_ERROR("Unable to allocate beacon storage: %d\n",
                err);
        goto failed;
    }
    rtllib_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 */

    ieee->rtllib_ap_sec_type = rtllib_ap_sec_type;

    spin_lock_init(&ieee->lock);
    spin_lock_init(&ieee->wpax_suitlist_lock);
    spin_lock_init(&ieee->bw_spinlock);
    spin_lock_init(&ieee->reorder_spinlock);
    atomic_set(&(ieee->atm_chnlop), 0);
    atomic_set(&(ieee->atm_swbw), 0);

    /* SAM FIXME */
    lib80211_crypt_info_init(&ieee->crypt_info, "RTLLIB", &ieee->lock);

    ieee->bHalfNMode = false;
    ieee->wpa_enabled = 0;
    ieee->tkip_countermeasures = 0;
    ieee->drop_unencrypted = 0;
    ieee->privacy_invoked = 0;
    ieee->ieee802_1x = 1;
    ieee->raw_tx = 0;
    ieee->hwsec_active = 0;

    memset(ieee->swcamtable, 0, sizeof(struct sw_cam_table) * 32);
    rtllib_softmac_init(ieee);

    ieee->pHTInfo = kzalloc(sizeof(struct rt_hi_throughput), GFP_KERNEL);
    if (ieee->pHTInfo == NULL) {
        RTLLIB_DEBUG(RTLLIB_DL_ERR, "can't alloc memory for HTInfo\n");
        return NULL;
    }
    HTUpdateDefaultSetting(ieee);
    HTInitializeHTInfo(ieee);
    TSInitialize(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;
    }

    return dev;

 failed:
    if (dev)
        free_netdev(dev);
    return NULL;
}
EXPORT_SYMBOL(alloc_rtllib);

void free_rtllib(struct net_device *dev)
{
    struct rtllib_device *ieee = (struct rtllib_device *)
                      netdev_priv_rsl(dev);

    kfree(ieee->pHTInfo);
    ieee->pHTInfo = NULL;
    rtllib_softmac_free(ieee);

    lib80211_crypt_info_free(&ieee->crypt_info);

    rtllib_networks_free(ieee);
    free_netdev(dev);
}
EXPORT_SYMBOL(free_rtllib);

u32 rtllib_debug_level;
static int debug = \
                RTLLIB_DL_ERR
                ;
static struct proc_dir_entry *rtllib_proc;

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", rtllib_debug_level);
}

static int store_debug_level(struct file *file, const char __user *buffer,
                 unsigned long count, void *data)
{
    char buf[] = "0x00000000";
    unsigned long len = min((unsigned long)sizeof(buf) - 1, 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
        rtllib_debug_level = val;

    return strnlen(buf, count);
}

int __init rtllib_init(void)
{
    struct proc_dir_entry *e;

    rtllib_debug_level = debug;
    rtllib_proc = create_proc_entry(DRV_NAME, S_IFDIR, init_net.proc_net);
    if (rtllib_proc == NULL) {
        RTLLIB_ERROR("Unable to create " DRV_NAME
                " proc directory\n");
        return -EIO;
    }
    e = create_proc_entry("debug_level", S_IFREG | S_IRUGO | S_IWUSR,
                  rtllib_proc);
    if (!e) {
        remove_proc_entry(DRV_NAME, init_net.proc_net);
        rtllib_proc = NULL;
        return -EIO;
    }
    e->read_proc = show_debug_level;
    e->write_proc = store_debug_level;
    e->data = NULL;

    return 0;
}

void __exit rtllib_exit(void)
{
    if (rtllib_proc) {
        remove_proc_entry("debug_level", rtllib_proc);
        remove_proc_entry(DRV_NAME, init_net.proc_net);
        rtllib_proc = NULL;
    }
}

module_init(rtllib_init);
module_exit(rtllib_exit);

MODULE_LICENSE("GPL");