/* src/p80211/p80211knetdev.c
*
* Linux Kernel net device interface
*
* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
* --------------------------------------------------------------------
*
* linux-wlan
*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU Public License version 2 (the "GPL"), in which
* case the provisions of the GPL are applicable instead of the
* above. If you wish to allow the use of your version of this file
* only under the terms of the GPL and not to allow others to use
* your version of this file under the MPL, indicate your decision
* by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL. If you do not delete
* the provisions above, a recipient may use your version of this
* file under either the MPL or the GPL.
*
* --------------------------------------------------------------------
*
* Inquiries regarding the linux-wlan Open Source project can be
* made directly to:
*
* AbsoluteValue Systems Inc.
* info@linux-wlan.com
* http://www.linux-wlan.com
*
* --------------------------------------------------------------------
*
* Portions of the development of this software were funded by
* Intersil Corporation as part of PRISM(R) chipset product development.
*
* --------------------------------------------------------------------
*
* The functions required for a Linux network device are defined here.
*
* --------------------------------------------------------------------
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/kmod.h>
#include <linux/if_arp.h>
#include <linux/wireless.h>
#include <linux/sockios.h>
#include <linux/etherdevice.h>
#include <linux/if_ether.h>
#include <linux/byteorder/generic.h>
#include <linux/bitops.h>
#include <linux/uaccess.h>
#include <asm/byteorder.h>
#ifdef SIOCETHTOOL
#include <linux/ethtool.h>
#endif
#include <net/iw_handler.h>
#include <net/net_namespace.h>
#include <net/cfg80211.h>
#include "p80211types.h"
#include "p80211hdr.h"
#include "p80211conv.h"
#include "p80211mgmt.h"
#include "p80211msg.h"
#include "p80211netdev.h"
#include "p80211ioctl.h"
#include "p80211req.h"
#include "p80211metastruct.h"
#include "p80211metadef.h"
#include "cfg80211.c"
/* netdevice method functions */
static int p80211knetdev_init(netdevice_t *netdev);
static int p80211knetdev_open(netdevice_t *netdev);
static int p80211knetdev_stop(netdevice_t *netdev);
static int p80211knetdev_hard_start_xmit(struct sk_buff *skb,
netdevice_t *netdev);
static void p80211knetdev_set_multicast_list(netdevice_t *dev);
static int p80211knetdev_do_ioctl(netdevice_t *dev, struct ifreq *ifr,
int cmd);
static int p80211knetdev_set_mac_address(netdevice_t *dev, void *addr);
static void p80211knetdev_tx_timeout(netdevice_t *netdev);
static int p80211_rx_typedrop(wlandevice_t *wlandev, u16 fc);
int wlan_watchdog = 5000;
module_param(wlan_watchdog, int, 0644);
MODULE_PARM_DESC(wlan_watchdog, "transmit timeout in milliseconds");
int wlan_wext_write = 1;
module_param(wlan_wext_write, int, 0644);
MODULE_PARM_DESC(wlan_wext_write, "enable write wireless extensions");
/*----------------------------------------------------------------
* p80211knetdev_init
*
* Init method for a Linux netdevice. Called in response to
* register_netdev.
*
* Arguments:
* none
*
* Returns:
* nothing
----------------------------------------------------------------*/
static int p80211knetdev_init(netdevice_t *netdev)
{
/* Called in response to register_netdev */
/* This is usually the probe function, but the probe has */
/* already been done by the MSD and the create_kdev */
/* function. All we do here is return success */
return 0;
}
/*----------------------------------------------------------------
* p80211knetdev_open
*
* Linux netdevice open method. Following a successful call here,
* the device is supposed to be ready for tx and rx. In our
* situation that may not be entirely true due to the state of the
* MAC below.
*
* Arguments:
* netdev Linux network device structure
*
* Returns:
* zero on success, non-zero otherwise
----------------------------------------------------------------*/
static int p80211knetdev_open(netdevice_t *netdev)
{
int result = 0; /* success */
wlandevice_t *wlandev = netdev->ml_priv;
/* Check to make sure the MSD is running */
if (wlandev->msdstate != WLAN_MSD_RUNNING)
return -ENODEV;
/* Tell the MSD to open */
if (wlandev->open != NULL) {
result = wlandev->open(wlandev);
if (result == 0) {
netif_start_queue(wlandev->netdev);
wlandev->state = WLAN_DEVICE_OPEN;
}
} else {
result = -EAGAIN;
}
return result;
}
/*----------------------------------------------------------------
* p80211knetdev_stop
*
* Linux netdevice stop (close) method. Following this call,
* no frames should go up or down through this interface.
*
* Arguments:
* netdev Linux network device structure
*
* Returns:
* zero on success, non-zero otherwise
----------------------------------------------------------------*/
static int p80211knetdev_stop(netdevice_t *netdev)
{
int result = 0;
wlandevice_t *wlandev = netdev->ml_priv;
if (wlandev->close != NULL)
result = wlandev->close(wlandev);
netif_stop_queue(wlandev->netdev);
wlandev->state = WLAN_DEVICE_CLOSED;
return result;
}
/*----------------------------------------------------------------
* p80211netdev_rx
*
* Frame receive function called by the mac specific driver.
*
* Arguments:
* wlandev WLAN network device structure
* skb skbuff containing a full 802.11 frame.
* Returns:
* nothing
* Side effects:
*
----------------------------------------------------------------*/
void p80211netdev_rx(wlandevice_t *wlandev, struct sk_buff *skb)
{
/* Enqueue for post-irq processing */
skb_queue_tail(&wlandev->nsd_rxq, skb);
tasklet_schedule(&wlandev->rx_bh);
}
#define CONV_TO_ETHER_SKIPPED 0x01
#define CONV_TO_ETHER_FAILED 0x02
/**
* p80211_convert_to_ether - conversion from 802.11 frame to ethernet frame
* @wlandev: pointer to WLAN device
* @skb: pointer to socket buffer
*
* Returns: 0 if conversion succeeded
* CONV_TO_ETHER_FAILED if conversion failed
* CONV_TO_ETHER_SKIPPED if frame is ignored
*/
static int p80211_convert_to_ether(wlandevice_t *wlandev, struct sk_buff *skb)
{
struct p80211_hdr_a3 *hdr;
hdr = (struct p80211_hdr_a3 *) skb->data;
if (p80211_rx_typedrop(wlandev, hdr->fc))
return CONV_TO_ETHER_SKIPPED;
/* perform mcast filtering: allow my local address through but reject
* anything else that isn't multicast
*/
if (wlandev->netdev->flags & IFF_ALLMULTI) {
if (!ether_addr_equal_unaligned(wlandev->netdev->dev_addr,
hdr->a1)) {
if (!is_multicast_ether_addr(hdr->a1))
return CONV_TO_ETHER_SKIPPED;
}
}
if (skb_p80211_to_ether(wlandev, wlandev->ethconv, skb) == 0) {
skb->dev->last_rx = jiffies;
wlandev->netdev->stats.rx_packets++;
wlandev->netdev->stats.rx_bytes += skb->len;
netif_rx_ni(skb);
return 0;
}
netdev_dbg(wlandev->netdev, "p80211_convert_to_ether failed.\n");
return CONV_TO_ETHER_FAILED;
}
/**
* p80211netdev_rx_bh - deferred processing of all received frames
*
* @arg: pointer to WLAN network device structure (cast to unsigned long)
*/
static void p80211netdev_rx_bh(unsigned long arg)
{
wlandevice_t *wlandev = (wlandevice_t *) arg;
struct sk_buff *skb = NULL;
netdevice_t *dev = wlandev->netdev;
/* Let's empty our our queue */
while ((skb = skb_dequeue(&wlandev->nsd_rxq))) {
if (wlandev->state == WLAN_DEVICE_OPEN) {
if (dev->type != ARPHRD_ETHER) {
/* RAW frame; we shouldn't convert it */
/* XXX Append the Prism Header here instead. */
/* set up various data fields */
skb->dev = dev;
skb_reset_mac_header(skb);
skb->ip_summed = CHECKSUM_NONE;
skb->pkt_type = PACKET_OTHERHOST;
skb->protocol = htons(ETH_P_80211_RAW);
dev->last_rx = jiffies;
dev->stats.rx_packets++;
dev->stats.rx_bytes += skb->len;
netif_rx_ni(skb);
continue;
} else {
if (!p80211_convert_to_ether(wlandev, skb))
continue;
}
}
dev_kfree_skb(skb);
}
}
/*----------------------------------------------------------------
* p80211knetdev_hard_start_xmit
*
* Linux netdevice method for transmitting a frame.
*
* Arguments:
* skb Linux sk_buff containing the frame.
* netdev Linux netdevice.
*
* Side effects:
* If the lower layers report that buffers are full. netdev->tbusy
* will be set to prevent higher layers from sending more traffic.
*
* Note: If this function returns non-zero, higher layers retain
* ownership of the skb.
*
* Returns:
* zero on success, non-zero on failure.
----------------------------------------------------------------*/
static int p80211knetdev_hard_start_xmit(struct sk_buff *skb,
netdevice_t *netdev)
{
int result = 0;
int txresult = -1;
wlandevice_t *wlandev = netdev->ml_priv;
union p80211_hdr p80211_hdr;
struct p80211_metawep p80211_wep;
p80211_wep.data = NULL;
if (skb == NULL)
return NETDEV_TX_OK;
if (wlandev->state != WLAN_DEVICE_OPEN) {
result = 1;
goto failed;
}
memset(&p80211_hdr, 0, sizeof(union p80211_hdr));
memset(&p80211_wep, 0, sizeof(struct p80211_metawep));
if (netif_queue_stopped(netdev)) {
netdev_dbg(netdev, "called when queue stopped.\n");
result = 1;
goto failed;
}
netif_stop_queue(netdev);
/* Check to see that a valid mode is set */
switch (wlandev->macmode) {
case WLAN_MACMODE_IBSS_STA:
case WLAN_MACMODE_ESS_STA:
case WLAN_MACMODE_ESS_AP:
break;
default:
/* Mode isn't set yet, just drop the frame
* and return success .
* TODO: we need a saner way to handle this
*/
if (be16_to_cpu(skb->protocol) != ETH_P_80211_RAW) {
netif_start_queue(wlandev->netdev);
netdev_notice(netdev, "Tx attempt prior to association, frame dropped.\n");
netdev->stats.tx_dropped++;
result = 0;
goto failed;
}
break;
}
/* Check for raw transmits */
if (be16_to_cpu(skb->protocol) == ETH_P_80211_RAW) {
if (!capable(CAP_NET_ADMIN)) {
result = 1;
goto failed;
}
/* move the header over */
memcpy(&p80211_hdr, skb->data, sizeof(union p80211_hdr));
skb_pull(skb, sizeof(union p80211_hdr));
} else {
if (skb_ether_to_p80211
(wlandev, wlandev->ethconv, skb, &p80211_hdr,
&p80211_wep) != 0) {
/* convert failed */
netdev_dbg(netdev, "ether_to_80211(%d) failed.\n",
wlandev->ethconv);
result = 1;
goto failed;
}
}
if (wlandev->txframe == NULL) {
result = 1;
goto failed;
}
netdev->trans_start = jiffies;
netdev->stats.tx_packets++;
/* count only the packet payload */
netdev->stats.tx_bytes += skb->len;
txresult = wlandev->txframe(wlandev, skb, &p80211_hdr, &p80211_wep);
if (txresult == 0) {
/* success and more buf */
/* avail, re: hw_txdata */
netif_wake_queue(wlandev->netdev);
result = NETDEV_TX_OK;
} else if (txresult == 1) {
/* success, no more avail */
netdev_dbg(netdev, "txframe success, no more bufs\n");
/* netdev->tbusy = 1; don't set here, irqhdlr */
/* may have already cleared it */
result = NETDEV_TX_OK;
} else if (txresult == 2) {
/* alloc failure, drop frame */
netdev_dbg(netdev, "txframe returned alloc_fail\n");
result = NETDEV_TX_BUSY;
} else {
/* buffer full or queue busy, drop frame. */
netdev_dbg(netdev, "txframe returned full or busy\n");
result = NETDEV_TX_BUSY;
}
failed:
/* Free up the WEP buffer if it's not the same as the skb */
if ((p80211_wep.data) && (p80211_wep.data != skb->data))
kzfree(p80211_wep.data);
/* we always free the skb here, never in a lower level. */
if (!result)
dev_kfree_skb(skb);
return result;
}
/*----------------------------------------------------------------
* p80211knetdev_set_multicast_list
*
* Called from higher layers whenever there's a need to set/clear
* promiscuous mode or rewrite the multicast list.
*
* Arguments:
* none
*
* Returns:
* nothing
----------------------------------------------------------------*/
static void p80211knetdev_set_multicast_list(netdevice_t *dev)
{
wlandevice_t *wlandev = dev->ml_priv;
/* TODO: real multicast support as well */
if (wlandev->set_multicast_list)
wlandev->set_multicast_list(wlandev, dev);
}
#ifdef SIOCETHTOOL
static int p80211netdev_ethtool(wlandevice_t *wlandev, void __user *useraddr)
{
u32 ethcmd;
struct ethtool_drvinfo info;
struct ethtool_value edata;
memset(&info, 0, sizeof(info));
memset(&edata, 0, sizeof(edata));
if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd)))
return -EFAULT;
switch (ethcmd) {
case ETHTOOL_GDRVINFO:
info.cmd = ethcmd;
snprintf(info.driver, sizeof(info.driver), "p80211_%s",
wlandev->nsdname);
snprintf(info.version, sizeof(info.version), "%s",
WLAN_RELEASE);
if (copy_to_user(useraddr, &info, sizeof(info)))
return -EFAULT;
return 0;
#ifdef ETHTOOL_GLINK
case ETHTOOL_GLINK:
edata.cmd = ethcmd;
if (wlandev->linkstatus &&
(wlandev->macmode != WLAN_MACMODE_NONE)) {
edata.data = 1;
} else {
edata.data = 0;
}
if (copy_to_user(useraddr, &edata, sizeof(edata)))
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);
}
}