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/config.h>
#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 <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 */))


/* hostap.c */
static int prism2_wds_add(local_info_t *local, u8 *remote_addr,
			  int rtnl_locked);
static int prism2_wds_del(local_info_t *local, u8 *remote_addr,
			  int rtnl_locked, int do_not_remove);

/* hostap_ap.c */
static int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
				  struct iw_quality qual[], int buf_size,
				  int aplist);
static int prism2_ap_translate_scan(struct net_device *dev, char *buffer);
static int prism2_hostapd(struct ap_data *ap,
			  struct prism2_hostapd_param *param);
static void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
				struct ieee80211_crypt_data ***crypt);
static void ap_control_kickall(struct ap_data *ap);
#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
static int ap_control_add_mac(struct mac_restrictions *mac_restrictions,
			      u8 *mac);
static int ap_control_del_mac(struct mac_restrictions *mac_restrictions,
			      u8 *mac);
static void ap_control_flush_macs(struct mac_restrictions *mac_restrictions);
static int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev,
			       u8 *mac);
#endif /* !PRISM2_NO_KERNEL_IEEE80211_MGMT */


static const long freq_list[] = { 2412, 2417, 2422, 2427, 2432, 2437, 2442,
				  2447, 2452, 2457, 2462, 2467, 2472, 2484 };
#define FREQ_COUNT (sizeof(freq_list) / sizeof(freq_list[0]))


/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
static unsigned char rfc1042_header[] =
{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
static unsigned char bridge_tunnel_header[] =
{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
/* No encapsulation header if EtherType < 0x600 (=length) */


/* FIX: these could be compiled separately and linked together to hostap.o */
#include "hostap_ap.c"
#include "hostap_info.c"
#include "hostap_ioctl.c"
#include "hostap_proc.c"
#include "hostap_80211_rx.c"
#include "hostap_80211_tx.c"


struct net_device * hostap_add_interface(struct local_info *local,
					 int type, int rtnl_locked,
					 const char *prefix