1086 lines
30 KiB
C
1086 lines
30 KiB
C
/* src/p80211/p80211knetdev.c
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*
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* Linux Kernel net device interface
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*
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* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
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* --------------------------------------------------------------------
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*
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* linux-wlan
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*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU Public License version 2 (the "GPL"), in which
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* case the provisions of the GPL are applicable instead of the
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* above. If you wish to allow the use of your version of this file
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* only under the terms of the GPL and not to allow others to use
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* your version of this file under the MPL, indicate your decision
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* by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the MPL or the GPL.
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*
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* --------------------------------------------------------------------
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*
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* Inquiries regarding the linux-wlan Open Source project can be
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* made directly to:
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*
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* AbsoluteValue Systems Inc.
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* info@linux-wlan.com
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* http://www.linux-wlan.com
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*
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* --------------------------------------------------------------------
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*
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* Portions of the development of this software were funded by
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* Intersil Corporation as part of PRISM(R) chipset product development.
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*
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* --------------------------------------------------------------------
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*
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* The functions required for a Linux network device are defined here.
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*
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* --------------------------------------------------------------------
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <linux/proc_fs.h>
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#include <linux/interrupt.h>
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#include <linux/netdevice.h>
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#include <linux/kmod.h>
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#include <linux/if_arp.h>
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#include <linux/wireless.h>
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#include <linux/sockios.h>
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#include <linux/etherdevice.h>
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#include <linux/if_ether.h>
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#include <linux/byteorder/generic.h>
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#include <linux/bitops.h>
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#include <linux/uaccess.h>
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#include <asm/byteorder.h>
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#ifdef SIOCETHTOOL
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#include <linux/ethtool.h>
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#endif
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#include <net/iw_handler.h>
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#include <net/net_namespace.h>
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#include <net/cfg80211.h>
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#include "p80211types.h"
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#include "p80211hdr.h"
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#include "p80211conv.h"
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#include "p80211mgmt.h"
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#include "p80211msg.h"
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#include "p80211netdev.h"
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#include "p80211ioctl.h"
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#include "p80211req.h"
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#include "p80211metastruct.h"
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#include "p80211metadef.h"
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#include "cfg80211.c"
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/* netdevice method functions */
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static int p80211knetdev_init(netdevice_t *netdev);
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static int p80211knetdev_open(netdevice_t *netdev);
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static int p80211knetdev_stop(netdevice_t *netdev);
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static int p80211knetdev_hard_start_xmit(struct sk_buff *skb,
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netdevice_t *netdev);
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static void p80211knetdev_set_multicast_list(netdevice_t *dev);
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static int p80211knetdev_do_ioctl(netdevice_t *dev, struct ifreq *ifr,
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int cmd);
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static int p80211knetdev_set_mac_address(netdevice_t *dev, void *addr);
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static void p80211knetdev_tx_timeout(netdevice_t *netdev);
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static int p80211_rx_typedrop(wlandevice_t *wlandev, u16 fc);
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int wlan_watchdog = 5000;
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module_param(wlan_watchdog, int, 0644);
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MODULE_PARM_DESC(wlan_watchdog, "transmit timeout in milliseconds");
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int wlan_wext_write = 1;
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module_param(wlan_wext_write, int, 0644);
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MODULE_PARM_DESC(wlan_wext_write, "enable write wireless extensions");
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/*----------------------------------------------------------------
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* p80211knetdev_init
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*
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* Init method for a Linux netdevice. Called in response to
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* register_netdev.
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*
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* Arguments:
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* none
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*
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* Returns:
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* nothing
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----------------------------------------------------------------*/
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static int p80211knetdev_init(netdevice_t *netdev)
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{
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/* Called in response to register_netdev */
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/* This is usually the probe function, but the probe has */
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/* already been done by the MSD and the create_kdev */
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/* function. All we do here is return success */
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return 0;
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}
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/*----------------------------------------------------------------
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* p80211knetdev_open
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*
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* Linux netdevice open method. Following a successful call here,
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* the device is supposed to be ready for tx and rx. In our
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* situation that may not be entirely true due to the state of the
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* MAC below.
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*
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* Arguments:
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* netdev Linux network device structure
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*
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* Returns:
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* zero on success, non-zero otherwise
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----------------------------------------------------------------*/
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static int p80211knetdev_open(netdevice_t *netdev)
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{
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int result = 0; /* success */
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wlandevice_t *wlandev = netdev->ml_priv;
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/* Check to make sure the MSD is running */
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if (wlandev->msdstate != WLAN_MSD_RUNNING)
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return -ENODEV;
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/* Tell the MSD to open */
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if (wlandev->open != NULL) {
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result = wlandev->open(wlandev);
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if (result == 0) {
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netif_start_queue(wlandev->netdev);
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wlandev->state = WLAN_DEVICE_OPEN;
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}
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} else {
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result = -EAGAIN;
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}
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return result;
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}
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/*----------------------------------------------------------------
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* p80211knetdev_stop
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*
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* Linux netdevice stop (close) method. Following this call,
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* no frames should go up or down through this interface.
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*
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* Arguments:
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* netdev Linux network device structure
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*
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* Returns:
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* zero on success, non-zero otherwise
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----------------------------------------------------------------*/
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static int p80211knetdev_stop(netdevice_t *netdev)
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{
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int result = 0;
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wlandevice_t *wlandev = netdev->ml_priv;
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if (wlandev->close != NULL)
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result = wlandev->close(wlandev);
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netif_stop_queue(wlandev->netdev);
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wlandev->state = WLAN_DEVICE_CLOSED;
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return result;
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}
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/*----------------------------------------------------------------
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* p80211netdev_rx
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*
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* Frame receive function called by the mac specific driver.
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*
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* Arguments:
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* wlandev WLAN network device structure
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* skb skbuff containing a full 802.11 frame.
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* Returns:
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* nothing
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* Side effects:
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*
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----------------------------------------------------------------*/
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void p80211netdev_rx(wlandevice_t *wlandev, struct sk_buff *skb)
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{
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/* Enqueue for post-irq processing */
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skb_queue_tail(&wlandev->nsd_rxq, skb);
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tasklet_schedule(&wlandev->rx_bh);
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}
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#define CONV_TO_ETHER_SKIPPED 0x01
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#define CONV_TO_ETHER_FAILED 0x02
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/**
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* p80211_convert_to_ether - conversion from 802.11 frame to ethernet frame
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* @wlandev: pointer to WLAN device
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* @skb: pointer to socket buffer
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*
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* Returns: 0 if conversion succeeded
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* CONV_TO_ETHER_FAILED if conversion failed
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* CONV_TO_ETHER_SKIPPED if frame is ignored
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*/
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static int p80211_convert_to_ether(wlandevice_t *wlandev, struct sk_buff *skb)
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{
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struct p80211_hdr_a3 *hdr;
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hdr = (struct p80211_hdr_a3 *) skb->data;
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if (p80211_rx_typedrop(wlandev, hdr->fc))
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return CONV_TO_ETHER_SKIPPED;
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/* perform mcast filtering: allow my local address through but reject
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* anything else that isn't multicast
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*/
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if (wlandev->netdev->flags & IFF_ALLMULTI) {
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if (!ether_addr_equal_unaligned(wlandev->netdev->dev_addr,
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hdr->a1)) {
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if (!is_multicast_ether_addr(hdr->a1))
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return CONV_TO_ETHER_SKIPPED;
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}
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}
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if (skb_p80211_to_ether(wlandev, wlandev->ethconv, skb) == 0) {
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skb->dev->last_rx = jiffies;
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wlandev->netdev->stats.rx_packets++;
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wlandev->netdev->stats.rx_bytes += skb->len;
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netif_rx_ni(skb);
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return 0;
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}
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netdev_dbg(wlandev->netdev, "p80211_convert_to_ether failed.\n");
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return CONV_TO_ETHER_FAILED;
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}
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/**
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* p80211netdev_rx_bh - deferred processing of all received frames
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*
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* @arg: pointer to WLAN network device structure (cast to unsigned long)
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*/
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static void p80211netdev_rx_bh(unsigned long arg)
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{
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wlandevice_t *wlandev = (wlandevice_t *) arg;
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struct sk_buff *skb = NULL;
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netdevice_t *dev = wlandev->netdev;
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/* Let's empty our our queue */
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while ((skb = skb_dequeue(&wlandev->nsd_rxq))) {
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if (wlandev->state == WLAN_DEVICE_OPEN) {
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if (dev->type != ARPHRD_ETHER) {
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/* RAW frame; we shouldn't convert it */
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/* XXX Append the Prism Header here instead. */
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/* set up various data fields */
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skb->dev = dev;
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skb_reset_mac_header(skb);
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skb->ip_summed = CHECKSUM_NONE;
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skb->pkt_type = PACKET_OTHERHOST;
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skb->protocol = htons(ETH_P_80211_RAW);
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dev->last_rx = jiffies;
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dev->stats.rx_packets++;
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dev->stats.rx_bytes += skb->len;
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netif_rx_ni(skb);
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continue;
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} else {
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if (!p80211_convert_to_ether(wlandev, skb))
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continue;
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}
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}
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dev_kfree_skb(skb);
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}
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}
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/*----------------------------------------------------------------
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* p80211knetdev_hard_start_xmit
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*
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* Linux netdevice method for transmitting a frame.
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*
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* Arguments:
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* skb Linux sk_buff containing the frame.
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* netdev Linux netdevice.
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*
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* Side effects:
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* If the lower layers report that buffers are full. netdev->tbusy
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* will be set to prevent higher layers from sending more traffic.
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*
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* Note: If this function returns non-zero, higher layers retain
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* ownership of the skb.
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*
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* Returns:
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* zero on success, non-zero on failure.
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----------------------------------------------------------------*/
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static int p80211knetdev_hard_start_xmit(struct sk_buff *skb,
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netdevice_t *netdev)
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{
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int result = 0;
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int txresult = -1;
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wlandevice_t *wlandev = netdev->ml_priv;
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union p80211_hdr p80211_hdr;
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struct p80211_metawep p80211_wep;
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p80211_wep.data = NULL;
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if (skb == NULL)
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return NETDEV_TX_OK;
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if (wlandev->state != WLAN_DEVICE_OPEN) {
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result = 1;
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goto failed;
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}
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memset(&p80211_hdr, 0, sizeof(union p80211_hdr));
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memset(&p80211_wep, 0, sizeof(struct p80211_metawep));
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if (netif_queue_stopped(netdev)) {
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netdev_dbg(netdev, "called when queue stopped.\n");
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result = 1;
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goto failed;
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}
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netif_stop_queue(netdev);
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/* Check to see that a valid mode is set */
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switch (wlandev->macmode) {
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case WLAN_MACMODE_IBSS_STA:
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case WLAN_MACMODE_ESS_STA:
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case WLAN_MACMODE_ESS_AP:
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break;
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default:
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/* Mode isn't set yet, just drop the frame
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* and return success .
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* TODO: we need a saner way to handle this
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*/
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if (skb->protocol != ETH_P_80211_RAW) {
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netif_start_queue(wlandev->netdev);
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netdev_notice(netdev, "Tx attempt prior to association, frame dropped.\n");
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netdev->stats.tx_dropped++;
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result = 0;
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goto failed;
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}
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break;
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}
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/* Check for raw transmits */
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if (skb->protocol == ETH_P_80211_RAW) {
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if (!capable(CAP_NET_ADMIN)) {
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result = 1;
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goto failed;
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}
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/* move the header over */
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memcpy(&p80211_hdr, skb->data, sizeof(union p80211_hdr));
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skb_pull(skb, sizeof(union p80211_hdr));
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} else {
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if (skb_ether_to_p80211
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(wlandev, wlandev->ethconv, skb, &p80211_hdr,
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&p80211_wep) != 0) {
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/* convert failed */
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netdev_dbg(netdev, "ether_to_80211(%d) failed.\n",
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wlandev->ethconv);
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result = 1;
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goto failed;
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}
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}
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if (wlandev->txframe == NULL) {
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result = 1;
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goto failed;
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}
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netdev->trans_start = jiffies;
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netdev->stats.tx_packets++;
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/* count only the packet payload */
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netdev->stats.tx_bytes += skb->len;
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txresult = wlandev->txframe(wlandev, skb, &p80211_hdr, &p80211_wep);
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if (txresult == 0) {
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/* success and more buf */
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/* avail, re: hw_txdata */
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netif_wake_queue(wlandev->netdev);
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result = NETDEV_TX_OK;
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} else if (txresult == 1) {
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/* success, no more avail */
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netdev_dbg(netdev, "txframe success, no more bufs\n");
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/* netdev->tbusy = 1; don't set here, irqhdlr */
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/* may have already cleared it */
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result = NETDEV_TX_OK;
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} else if (txresult == 2) {
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/* alloc failure, drop frame */
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netdev_dbg(netdev, "txframe returned alloc_fail\n");
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result = NETDEV_TX_BUSY;
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} else {
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/* buffer full or queue busy, drop frame. */
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netdev_dbg(netdev, "txframe returned full or busy\n");
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result = NETDEV_TX_BUSY;
|
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}
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|
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failed:
|
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/* Free up the WEP buffer if it's not the same as the skb */
|
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if ((p80211_wep.data) && (p80211_wep.data != skb->data))
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kzfree(p80211_wep.data);
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/* we always free the skb here, never in a lower level. */
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if (!result)
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dev_kfree_skb(skb);
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|
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return result;
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}
|
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|
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/*----------------------------------------------------------------
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* p80211knetdev_set_multicast_list
|
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*
|
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* Called from higher layers whenever there's a need to set/clear
|
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* promiscuous mode or rewrite the multicast list.
|
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*
|
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* Arguments:
|
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* none
|
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*
|
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* Returns:
|
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* nothing
|
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----------------------------------------------------------------*/
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static void p80211knetdev_set_multicast_list(netdevice_t *dev)
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{
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wlandevice_t *wlandev = dev->ml_priv;
|
|
|
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/* TODO: real multicast support as well */
|
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|
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if (wlandev->set_multicast_list)
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wlandev->set_multicast_list(wlandev, dev);
|
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|
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}
|
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|
|
#ifdef SIOCETHTOOL
|
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|
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static int p80211netdev_ethtool(wlandevice_t *wlandev, void __user *useraddr)
|
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{
|
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u32 ethcmd;
|
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struct ethtool_drvinfo info;
|
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struct ethtool_value edata;
|
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|
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memset(&info, 0, sizeof(info));
|
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memset(&edata, 0, sizeof(edata));
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|
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if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd)))
|
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return -EFAULT;
|
|
|
|
switch (ethcmd) {
|
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case ETHTOOL_GDRVINFO:
|
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info.cmd = ethcmd;
|
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snprintf(info.driver, sizeof(info.driver), "p80211_%s",
|
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wlandev->nsdname);
|
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snprintf(info.version, sizeof(info.version), "%s",
|
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WLAN_RELEASE);
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|
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if (copy_to_user(useraddr, &info, sizeof(info)))
|
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return -EFAULT;
|
|
return 0;
|
|
#ifdef ETHTOOL_GLINK
|
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case ETHTOOL_GLINK:
|
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edata.cmd = ethcmd;
|
|
|
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if (wlandev->linkstatus &&
|
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(wlandev->macmode != WLAN_MACMODE_NONE)) {
|
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edata.data = 1;
|
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} else {
|
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edata.data = 0;
|
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}
|
|
|
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if (copy_to_user(useraddr, &edata, sizeof(edata)))
|
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return -EFAULT;
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
#endif
|
|
|
|
/*----------------------------------------------------------------
|
|
* p80211knetdev_do_ioctl
|
|
*
|
|
* Handle an ioctl call on one of our devices. Everything Linux
|
|
* ioctl specific is done here. Then we pass the contents of the
|
|
* ifr->data to the request message handler.
|
|
*
|
|
* Arguments:
|
|
* dev Linux kernel netdevice
|
|
* ifr Our private ioctl request structure, typed for the
|
|
* generic struct ifreq so we can use ptr to func
|
|
* w/o cast.
|
|
*
|
|
* Returns:
|
|
* zero on success, a negative errno on failure. Possible values:
|
|
* -ENETDOWN Device isn't up.
|
|
* -EBUSY cmd already in progress
|
|
* -ETIME p80211 cmd timed out (MSD may have its own timers)
|
|
* -EFAULT memory fault copying msg from user buffer
|
|
* -ENOMEM unable to allocate kernel msg buffer
|
|
* -ENOSYS bad magic, it the cmd really for us?
|
|
* -EintR sleeping on cmd, awakened by signal, cmd cancelled.
|
|
*
|
|
* Call Context:
|
|
* Process thread (ioctl caller). TODO: SMP support may require
|
|
* locks.
|
|
----------------------------------------------------------------*/
|
|
static int p80211knetdev_do_ioctl(netdevice_t *dev, struct ifreq *ifr, int cmd)
|
|
{
|
|
int result = 0;
|
|
struct p80211ioctl_req *req = (struct p80211ioctl_req *) ifr;
|
|
wlandevice_t *wlandev = dev->ml_priv;
|
|
u8 *msgbuf;
|
|
|
|
netdev_dbg(dev, "rx'd ioctl, cmd=%d, len=%d\n", cmd, req->len);
|
|
|
|
#ifdef SIOCETHTOOL
|
|
if (cmd == SIOCETHTOOL) {
|
|
result =
|
|
p80211netdev_ethtool(wlandev, (void __user *)ifr->ifr_data);
|
|
goto bail;
|
|
}
|
|
#endif
|
|
|
|
/* Test the magic, assume ifr is good if it's there */
|
|
if (req->magic != P80211_IOCTL_MAGIC) {
|
|
result = -ENOSYS;
|
|
goto bail;
|
|
}
|
|
|
|
if (cmd == P80211_IFTEST) {
|
|
result = 0;
|
|
goto bail;
|
|
} else if (cmd != P80211_IFREQ) {
|
|
result = -ENOSYS;
|
|
goto bail;
|
|
}
|
|
|
|
/* Allocate a buf of size req->len */
|
|
msgbuf = kmalloc(req->len, GFP_KERNEL);
|
|
if (msgbuf) {
|
|
if (copy_from_user(msgbuf, (void __user *)req->data, req->len))
|
|
result = -EFAULT;
|
|
else
|
|
result = p80211req_dorequest(wlandev, msgbuf);
|
|
|
|
if (result == 0) {
|
|
if (copy_to_user
|
|
((void __user *)req->data, msgbuf, req->len)) {
|
|
result = -EFAULT;
|
|
}
|
|
}
|
|
kfree(msgbuf);
|
|
} else {
|
|
result = -ENOMEM;
|
|
}
|
|
bail:
|
|
/* If allocate,copyfrom or copyto fails, return errno */
|
|
return result;
|
|
}
|
|
|
|
/*----------------------------------------------------------------
|
|
* p80211knetdev_set_mac_address
|
|
*
|
|
* Handles the ioctl for changing the MACAddress of a netdevice
|
|
*
|
|
* references: linux/netdevice.h and drivers/net/net_init.c
|
|
*
|
|
* NOTE: [MSM] We only prevent address changes when the netdev is
|
|
* up. We don't control anything based on dot11 state. If the
|
|
* address is changed on a STA that's currently associated, you
|
|
* will probably lose the ability to send and receive data frames.
|
|
* Just be aware. Therefore, this should usually only be done
|
|
* prior to scan/join/auth/assoc.
|
|
*
|
|
* Arguments:
|
|
* dev netdevice struct
|
|
* addr the new MACAddress (a struct)
|
|
*
|
|
* Returns:
|
|
* zero on success, a negative errno on failure. Possible values:
|
|
* -EBUSY device is bussy (cmd not possible)
|
|
* -and errors returned by: p80211req_dorequest(..)
|
|
*
|
|
* by: Collin R. Mulliner <collin@mulliner.org>
|
|
----------------------------------------------------------------*/
|
|
static int p80211knetdev_set_mac_address(netdevice_t *dev, void *addr)
|
|
{
|
|
struct sockaddr *new_addr = addr;
|
|
struct p80211msg_dot11req_mibset dot11req;
|
|
p80211item_unk392_t *mibattr;
|
|
p80211item_pstr6_t *macaddr;
|
|
p80211item_uint32_t *resultcode;
|
|
int result;
|
|
|
|
/* If we're running, we don't allow MAC address changes */
|
|
if (netif_running(dev))
|
|
return -EBUSY;
|
|
|
|
/* Set up some convenience pointers. */
|
|
mibattr = &dot11req.mibattribute;
|
|
macaddr = (p80211item_pstr6_t *) &mibattr->data;
|
|
resultcode = &dot11req.resultcode;
|
|
|
|
/* Set up a dot11req_mibset */
|
|
memset(&dot11req, 0, sizeof(struct p80211msg_dot11req_mibset));
|
|
dot11req.msgcode = DIDmsg_dot11req_mibset;
|
|
dot11req.msglen = sizeof(struct p80211msg_dot11req_mibset);
|
|
memcpy(dot11req.devname,
|
|
((wlandevice_t *) dev->ml_priv)->name, WLAN_DEVNAMELEN_MAX - 1);
|
|
|
|
/* Set up the mibattribute argument */
|
|
mibattr->did = DIDmsg_dot11req_mibset_mibattribute;
|
|
mibattr->status = P80211ENUM_msgitem_status_data_ok;
|
|
mibattr->len = sizeof(mibattr->data);
|
|
|
|
macaddr->did = DIDmib_dot11mac_dot11OperationTable_dot11MACAddress;
|
|
macaddr->status = P80211ENUM_msgitem_status_data_ok;
|
|
macaddr->len = sizeof(macaddr->data);
|
|
macaddr->data.len = ETH_ALEN;
|
|
memcpy(&macaddr->data.data, new_addr->sa_data, ETH_ALEN);
|
|
|
|
/* Set up the resultcode argument */
|
|
resultcode->did = DIDmsg_dot11req_mibset_resultcode;
|
|
resultcode->status = P80211ENUM_msgitem_status_no_value;
|
|
resultcode->len = sizeof(resultcode->data);
|
|
resultcode->data = 0;
|
|
|
|
/* now fire the request */
|
|
result = p80211req_dorequest(dev->ml_priv, (u8 *) &dot11req);
|
|
|
|
/* If the request wasn't successful, report an error and don't
|
|
* change the netdev address
|
|
*/
|
|
if (result != 0 || resultcode->data != P80211ENUM_resultcode_success) {
|
|
netdev_err(dev, "Low-level driver failed dot11req_mibset(dot11MACAddress).\n");
|
|
result = -EADDRNOTAVAIL;
|
|
} else {
|
|
/* everything's ok, change the addr in netdev */
|
|
memcpy(dev->dev_addr, new_addr->sa_data, dev->addr_len);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static int wlan_change_mtu(netdevice_t *dev, int new_mtu)
|
|
{
|
|
/* 2312 is max 802.11 payload, 20 is overhead, (ether + llc +snap)
|
|
and another 8 for wep. */
|
|
if ((new_mtu < 68) || (new_mtu > (2312 - 20 - 8)))
|
|
return -EINVAL;
|
|
|
|
dev->mtu = new_mtu;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct net_device_ops p80211_netdev_ops = {
|
|
.ndo_init = p80211knetdev_init,
|
|
.ndo_open = p80211knetdev_open,
|
|
.ndo_stop = p80211knetdev_stop,
|
|
.ndo_start_xmit = p80211knetdev_hard_start_xmit,
|
|
.ndo_set_rx_mode = p80211knetdev_set_multicast_list,
|
|
.ndo_do_ioctl = p80211knetdev_do_ioctl,
|
|
.ndo_set_mac_address = p80211knetdev_set_mac_address,
|
|
.ndo_tx_timeout = p80211knetdev_tx_timeout,
|
|
.ndo_change_mtu = wlan_change_mtu,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
};
|
|
|
|
/*----------------------------------------------------------------
|
|
* wlan_setup
|
|
*
|
|
* Roughly matches the functionality of ether_setup. Here
|
|
* we set up any members of the wlandevice structure that are common
|
|
* to all devices. Additionally, we allocate a linux 'struct device'
|
|
* and perform the same setup as ether_setup.
|
|
*
|
|
* Note: It's important that the caller have setup the wlandev->name
|
|
* ptr prior to calling this function.
|
|
*
|
|
* Arguments:
|
|
* wlandev ptr to the wlandev structure for the
|
|
* interface.
|
|
* physdev ptr to usb device
|
|
* Returns:
|
|
* zero on success, non-zero otherwise.
|
|
* Call Context:
|
|
* Should be process thread. We'll assume it might be
|
|
* interrupt though. When we add support for statically
|
|
* compiled drivers, this function will be called in the
|
|
* context of the kernel startup code.
|
|
----------------------------------------------------------------*/
|
|
int wlan_setup(wlandevice_t *wlandev, struct device *physdev)
|
|
{
|
|
int result = 0;
|
|
netdevice_t *netdev;
|
|
struct wiphy *wiphy;
|
|
struct wireless_dev *wdev;
|
|
|
|
/* Set up the wlandev */
|
|
wlandev->state = WLAN_DEVICE_CLOSED;
|
|
wlandev->ethconv = WLAN_ETHCONV_8021h;
|
|
wlandev->macmode = WLAN_MACMODE_NONE;
|
|
|
|
/* Set up the rx queue */
|
|
skb_queue_head_init(&wlandev->nsd_rxq);
|
|
tasklet_init(&wlandev->rx_bh,
|
|
p80211netdev_rx_bh, (unsigned long)wlandev);
|
|
|
|
/* Allocate and initialize the wiphy struct */
|
|
wiphy = wlan_create_wiphy(physdev, wlandev);
|
|
if (wiphy == NULL) {
|
|
dev_err(physdev, "Failed to alloc wiphy.\n");
|
|
return 1;
|
|
}
|
|
|
|
/* Allocate and initialize the struct device */
|
|
netdev = alloc_netdev(sizeof(struct wireless_dev), "wlan%d",
|
|
NET_NAME_UNKNOWN, ether_setup);
|
|
if (netdev == NULL) {
|
|
dev_err(physdev, "Failed to alloc netdev.\n");
|
|
wlan_free_wiphy(wiphy);
|
|
result = 1;
|
|
} else {
|
|
wlandev->netdev = netdev;
|
|
netdev->ml_priv = wlandev;
|
|
netdev->netdev_ops = &p80211_netdev_ops;
|
|
wdev = netdev_priv(netdev);
|
|
wdev->wiphy = wiphy;
|
|
wdev->iftype = NL80211_IFTYPE_STATION;
|
|
netdev->ieee80211_ptr = wdev;
|
|
|
|
netif_stop_queue(netdev);
|
|
netif_carrier_off(netdev);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*----------------------------------------------------------------
|
|
* wlan_unsetup
|
|
*
|
|
* This function is paired with the wlan_setup routine. It should
|
|
* be called after unregister_wlandev. Basically, all it does is
|
|
* free the 'struct device' that's associated with the wlandev.
|
|
* We do it here because the 'struct device' isn't allocated
|
|
* explicitly in the driver code, it's done in wlan_setup. To
|
|
* do the free in the driver might seem like 'magic'.
|
|
*
|
|
* Arguments:
|
|
* wlandev ptr to the wlandev structure for the
|
|
* interface.
|
|
* Call Context:
|
|
* Should be process thread. We'll assume it might be
|
|
* interrupt though. When we add support for statically
|
|
* compiled drivers, this function will be called in the
|
|
* context of the kernel startup code.
|
|
----------------------------------------------------------------*/
|
|
void wlan_unsetup(wlandevice_t *wlandev)
|
|
{
|
|
struct wireless_dev *wdev;
|
|
|
|
tasklet_kill(&wlandev->rx_bh);
|
|
|
|
if (wlandev->netdev) {
|
|
wdev = netdev_priv(wlandev->netdev);
|
|
if (wdev->wiphy)
|
|
wlan_free_wiphy(wdev->wiphy);
|
|
free_netdev(wlandev->netdev);
|
|
wlandev->netdev = NULL;
|
|
}
|
|
}
|
|
|
|
/*----------------------------------------------------------------
|
|
* register_wlandev
|
|
*
|
|
* Roughly matches the functionality of register_netdev. This function
|
|
* is called after the driver has successfully probed and set up the
|
|
* resources for the device. It's now ready to become a named device
|
|
* in the Linux system.
|
|
*
|
|
* First we allocate a name for the device (if not already set), then
|
|
* we call the Linux function register_netdevice.
|
|
*
|
|
* Arguments:
|
|
* wlandev ptr to the wlandev structure for the
|
|
* interface.
|
|
* Returns:
|
|
* zero on success, non-zero otherwise.
|
|
* Call Context:
|
|
* Can be either interrupt or not.
|
|
----------------------------------------------------------------*/
|
|
int register_wlandev(wlandevice_t *wlandev)
|
|
{
|
|
return register_netdev(wlandev->netdev);
|
|
}
|
|
|
|
/*----------------------------------------------------------------
|
|
* unregister_wlandev
|
|
*
|
|
* Roughly matches the functionality of unregister_netdev. This
|
|
* function is called to remove a named device from the system.
|
|
*
|
|
* First we tell linux that the device should no longer exist.
|
|
* Then we remove it from the list of known wlan devices.
|
|
*
|
|
* Arguments:
|
|
* wlandev ptr to the wlandev structure for the
|
|
* interface.
|
|
* Returns:
|
|
* zero on success, non-zero otherwise.
|
|
* Call Context:
|
|
* Can be either interrupt or not.
|
|
----------------------------------------------------------------*/
|
|
int unregister_wlandev(wlandevice_t *wlandev)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
unregister_netdev(wlandev->netdev);
|
|
|
|
/* Now to clean out the rx queue */
|
|
while ((skb = skb_dequeue(&wlandev->nsd_rxq)))
|
|
dev_kfree_skb(skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*----------------------------------------------------------------
|
|
* p80211netdev_hwremoved
|
|
*
|
|
* Hardware removed notification. This function should be called
|
|
* immediately after an MSD has detected that the underlying hardware
|
|
* has been yanked out from under us. The primary things we need
|
|
* to do are:
|
|
* - Mark the wlandev
|
|
* - Prevent any further traffic from the knetdev i/f
|
|
* - Prevent any further requests from mgmt i/f
|
|
* - If there are any waitq'd mgmt requests or mgmt-frame exchanges,
|
|
* shut them down.
|
|
* - Call the MSD hwremoved function.
|
|
*
|
|
* The remainder of the cleanup will be handled by unregister().
|
|
* Our primary goal here is to prevent as much tickling of the MSD
|
|
* as possible since the MSD is already in a 'wounded' state.
|
|
*
|
|
* TODO: As new features are added, this function should be
|
|
* updated.
|
|
*
|
|
* Arguments:
|
|
* wlandev WLAN network device structure
|
|
* Returns:
|
|
* nothing
|
|
* Side effects:
|
|
*
|
|
* Call context:
|
|
* Usually interrupt.
|
|
----------------------------------------------------------------*/
|
|
void p80211netdev_hwremoved(wlandevice_t *wlandev)
|
|
{
|
|
wlandev->hwremoved = 1;
|
|
if (wlandev->state == WLAN_DEVICE_OPEN)
|
|
netif_stop_queue(wlandev->netdev);
|
|
|
|
netif_device_detach(wlandev->netdev);
|
|
}
|
|
|
|
/*----------------------------------------------------------------
|
|
* p80211_rx_typedrop
|
|
*
|
|
* Classifies the frame, increments the appropriate counter, and
|
|
* returns 0|1|2 indicating whether the driver should handle, ignore, or
|
|
* drop the frame
|
|
*
|
|
* Arguments:
|
|
* wlandev wlan device structure
|
|
* fc frame control field
|
|
*
|
|
* Returns:
|
|
* zero if the frame should be handled by the driver,
|
|
* one if the frame should be ignored
|
|
* anything else means we drop it.
|
|
*
|
|
* Side effects:
|
|
*
|
|
* Call context:
|
|
* interrupt
|
|
----------------------------------------------------------------*/
|
|
static int p80211_rx_typedrop(wlandevice_t *wlandev, u16 fc)
|
|
{
|
|
u16 ftype;
|
|
u16 fstype;
|
|
int drop = 0;
|
|
/* Classify frame, increment counter */
|
|
ftype = WLAN_GET_FC_FTYPE(fc);
|
|
fstype = WLAN_GET_FC_FSTYPE(fc);
|
|
#if 0
|
|
netdev_dbg(wlandev->netdev, "rx_typedrop : ftype=%d fstype=%d.\n",
|
|
ftype, fstype);
|
|
#endif
|
|
switch (ftype) {
|
|
case WLAN_FTYPE_MGMT:
|
|
if ((wlandev->netdev->flags & IFF_PROMISC) ||
|
|
(wlandev->netdev->flags & IFF_ALLMULTI)) {
|
|
drop = 1;
|
|
break;
|
|
}
|
|
netdev_dbg(wlandev->netdev, "rx'd mgmt:\n");
|
|
wlandev->rx.mgmt++;
|
|
switch (fstype) {
|
|
case WLAN_FSTYPE_ASSOCREQ:
|
|
/* printk("assocreq"); */
|
|
wlandev->rx.assocreq++;
|
|
break;
|
|
case WLAN_FSTYPE_ASSOCRESP:
|
|
/* printk("assocresp"); */
|
|
wlandev->rx.assocresp++;
|
|
break;
|
|
case WLAN_FSTYPE_REASSOCREQ:
|
|
/* printk("reassocreq"); */
|
|
wlandev->rx.reassocreq++;
|
|
break;
|
|
case WLAN_FSTYPE_REASSOCRESP:
|
|
/* printk("reassocresp"); */
|
|
wlandev->rx.reassocresp++;
|
|
break;
|
|
case WLAN_FSTYPE_PROBEREQ:
|
|
/* printk("probereq"); */
|
|
wlandev->rx.probereq++;
|
|
break;
|
|
case WLAN_FSTYPE_PROBERESP:
|
|
/* printk("proberesp"); */
|
|
wlandev->rx.proberesp++;
|
|
break;
|
|
case WLAN_FSTYPE_BEACON:
|
|
/* printk("beacon"); */
|
|
wlandev->rx.beacon++;
|
|
break;
|
|
case WLAN_FSTYPE_ATIM:
|
|
/* printk("atim"); */
|
|
wlandev->rx.atim++;
|
|
break;
|
|
case WLAN_FSTYPE_DISASSOC:
|
|
/* printk("disassoc"); */
|
|
wlandev->rx.disassoc++;
|
|
break;
|
|
case WLAN_FSTYPE_AUTHEN:
|
|
/* printk("authen"); */
|
|
wlandev->rx.authen++;
|
|
break;
|
|
case WLAN_FSTYPE_DEAUTHEN:
|
|
/* printk("deauthen"); */
|
|
wlandev->rx.deauthen++;
|
|
break;
|
|
default:
|
|
/* printk("unknown"); */
|
|
wlandev->rx.mgmt_unknown++;
|
|
break;
|
|
}
|
|
/* printk("\n"); */
|
|
drop = 2;
|
|
break;
|
|
|
|
case WLAN_FTYPE_CTL:
|
|
if ((wlandev->netdev->flags & IFF_PROMISC) ||
|
|
(wlandev->netdev->flags & IFF_ALLMULTI)) {
|
|
drop = 1;
|
|
break;
|
|
}
|
|
netdev_dbg(wlandev->netdev, "rx'd ctl:\n");
|
|
wlandev->rx.ctl++;
|
|
switch (fstype) {
|
|
case WLAN_FSTYPE_PSPOLL:
|
|
/* printk("pspoll"); */
|
|
wlandev->rx.pspoll++;
|
|
break;
|
|
case WLAN_FSTYPE_RTS:
|
|
/* printk("rts"); */
|
|
wlandev->rx.rts++;
|
|
break;
|
|
case WLAN_FSTYPE_CTS:
|
|
/* printk("cts"); */
|
|
wlandev->rx.cts++;
|
|
break;
|
|
case WLAN_FSTYPE_ACK:
|
|
/* printk("ack"); */
|
|
wlandev->rx.ack++;
|
|
break;
|
|
case WLAN_FSTYPE_CFEND:
|
|
/* printk("cfend"); */
|
|
wlandev->rx.cfend++;
|
|
break;
|
|
case WLAN_FSTYPE_CFENDCFACK:
|
|
/* printk("cfendcfack"); */
|
|
wlandev->rx.cfendcfack++;
|
|
break;
|
|
default:
|
|
/* printk("unknown"); */
|
|
wlandev->rx.ctl_unknown++;
|
|
break;
|
|
}
|
|
/* printk("\n"); */
|
|
drop = 2;
|
|
break;
|
|
|
|
case WLAN_FTYPE_DATA:
|
|
wlandev->rx.data++;
|
|
switch (fstype) {
|
|
case WLAN_FSTYPE_DATAONLY:
|
|
wlandev->rx.dataonly++;
|
|
break;
|
|
case WLAN_FSTYPE_DATA_CFACK:
|
|
wlandev->rx.data_cfack++;
|
|
break;
|
|
case WLAN_FSTYPE_DATA_CFPOLL:
|
|
wlandev->rx.data_cfpoll++;
|
|
break;
|
|
case WLAN_FSTYPE_DATA_CFACK_CFPOLL:
|
|
wlandev->rx.data__cfack_cfpoll++;
|
|
break;
|
|
case WLAN_FSTYPE_NULL:
|
|
netdev_dbg(wlandev->netdev, "rx'd data:null\n");
|
|
wlandev->rx.null++;
|
|
break;
|
|
case WLAN_FSTYPE_CFACK:
|
|
netdev_dbg(wlandev->netdev, "rx'd data:cfack\n");
|
|
wlandev->rx.cfack++;
|
|
break;
|
|
case WLAN_FSTYPE_CFPOLL:
|
|
netdev_dbg(wlandev->netdev, "rx'd data:cfpoll\n");
|
|
wlandev->rx.cfpoll++;
|
|
break;
|
|
case WLAN_FSTYPE_CFACK_CFPOLL:
|
|
netdev_dbg(wlandev->netdev, "rx'd data:cfack_cfpoll\n");
|
|
wlandev->rx.cfack_cfpoll++;
|
|
break;
|
|
default:
|
|
/* printk("unknown"); */
|
|
wlandev->rx.data_unknown++;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
}
|
|
return drop;
|
|
}
|
|
|
|
static void p80211knetdev_tx_timeout(netdevice_t *netdev)
|
|
{
|
|
wlandevice_t *wlandev = netdev->ml_priv;
|
|
|
|
if (wlandev->tx_timeout) {
|
|
wlandev->tx_timeout(wlandev);
|
|
} else {
|
|
netdev_warn(netdev, "Implement tx_timeout for %s\n",
|
|
wlandev->nsdname);
|
|
netif_wake_queue(wlandev->netdev);
|
|
}
|
|
}
|