path: root/drivers/net/wireless/hostap/hostap_main.c

/*
 * Host AP (software wireless LAN access point) driver for
 * Intersil Prism2/2.5/3 - hostap.o module, common routines
 *
 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
 * <jkmaline@cc.hut.fi>
 * Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation. See README and COPYING for
 * more details.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/if_arp.h>
#include <linux/delay.h>
#include <linux/random.h>
#include <linux/workqueue.h>
#include <linux/kmod.h>
#include <linux/rtnetlink.h>
#include <linux/wireless.h>
#include <linux/etherdevice.h>
#include <net/iw_handler.h>
#include <net/ieee80211.h>
#include <net/ieee80211_crypt.h>
#include <asm/uaccess.h>

#include "hostap_wlan.h"
#include "hostap_80211.h"
#include "hostap_ap.h"
#include "hostap.h"

MODULE_AUTHOR("Jouni Malinen");
MODULE_DESCRIPTION("Host AP common routines");
MODULE_LICENSE("GPL");
MODULE_VERSION(PRISM2_VERSION);

#define TX_TIMEOUT (2 * HZ)

#define PRISM2_MAX_FRAME_SIZE 2304
#define PRISM2_MIN_MTU 256
/* FIX: */
#define PRISM2_MAX_MTU (PRISM2_MAX_FRAME_SIZE - (6 /* LLC */ + 8 /* WEP */))


struct net_device * hostap_add_interface(struct local_info *local,
					 int type, int rtnl_locked,
					 const char *prefix,
					 const char *name)
{
	struct net_device *dev, *mdev;
	struct hostap_interface *iface;
	int ret;

	dev = alloc_etherdev(sizeof(struct hostap_interface));
	if (dev == NULL)
		return NULL;

	iface = netdev_priv(dev);
	iface->dev = dev;
	iface->local = local;
	iface->type = type;
	list_add(&iface->list, &local->hostap_interfaces);

	mdev = local->dev;
	memcpy(dev->dev_addr, mdev->dev_addr, ETH_ALEN);
	dev->base_addr = mdev->base_addr;
	dev->irq = mdev->irq;
	dev->mem_start = mdev->mem_start;
	dev->mem_end = mdev->mem_end;

	hostap_setup_dev(dev, local, 0);
	dev->destructor = free_netdev;

	sprintf(dev->name, "%s%s", prefix, name);
	if (!rtnl_locked)
		rtnl_lock();

	ret = 0;
	if (strchr(dev->name, '%'))
		ret = dev_alloc_name(dev, dev->name);

	SET_NETDEV_DEV(dev, mdev->class_dev.dev);
	if (ret >= 0)
		ret = register_netdevice(dev);

	if (!rtnl_locked)
		rtnl_unlock();

	if (ret < 0) {
		printk(KERN_WARNING "%s: failed to add new netdevice!\n",
		       dev->name);
		free_netdev(dev);
		return NULL;
	}

	printk(KERN_DEBUG "%s: registered netdevice %s\n",
	       mdev->name, dev->name);

	return dev;
}


void hostap_remove_interface(struct net_device *dev, int rtnl_locked,
			     int remove_from_list)
{
	struct hostap_interface *iface;

	if (!dev)
		return;

	iface = netdev_priv(dev);

	if (remove_from_list) {
		list_del(&iface->list);
	}

	if (dev == iface->local->ddev)
		iface->local->ddev = NULL;
	else if (dev == iface->local->apdev)
		iface->local->apdev = NULL;
	else if