// SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1)
|
/* 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
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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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*
|
* Software distributed under the License is distributed on an "AS
|
* 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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*
|
* 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.
|
*
|
* --------------------------------------------------------------------
|
*
|
* 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(struct net_device *netdev);
|
static int p80211knetdev_open(struct net_device *netdev);
|
static int p80211knetdev_stop(struct net_device *netdev);
|
static netdev_tx_t p80211knetdev_hard_start_xmit(struct sk_buff *skb,
|
struct net_device *netdev);
|
static void p80211knetdev_set_multicast_list(struct net_device *dev);
|
static int p80211knetdev_do_ioctl(struct net_device *dev, struct ifreq *ifr,
|
int cmd);
|
static int p80211knetdev_set_mac_address(struct net_device *dev, void *addr);
|
static void p80211knetdev_tx_timeout(struct net_device *netdev);
|
static int p80211_rx_typedrop(struct wlandevice *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(struct net_device *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(struct net_device *netdev)
|
{
|
int result = 0; /* success */
|
struct wlandevice *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) {
|
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(struct net_device *netdev)
|
{
|
int result = 0;
|
struct wlandevice *wlandev = netdev->ml_priv;
|
|
if (wlandev->close)
|
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(struct wlandevice *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(struct wlandevice *wlandev,
|
struct sk_buff *skb)
|
{
|
struct p80211_hdr_a3 *hdr;
|
|
hdr = (struct p80211_hdr_a3 *)skb->data;
|
if (p80211_rx_typedrop(wlandev, le16_to_cpu(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) {
|
wlandev->netdev->stats.rx_packets++;
|
wlandev->netdev->stats.rx_bytes += skb->len;
|
netif_rx_ni(skb);
|
return 0;
|
}
|
|
netdev_dbg(wlandev->netdev, "%s failed.\n", __func__);
|
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)
|
{
|
struct wlandevice *wlandev = (struct wlandevice *)arg;
|
struct sk_buff *skb = NULL;
|
struct net_device *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->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 netdev_tx_t p80211knetdev_hard_start_xmit(struct sk_buff *skb,
|
struct net_device *netdev)
|
{
|
int result = 0;
|
int txresult = -1;
|
struct wlandevice *wlandev = netdev->ml_priv;
|
union p80211_hdr p80211_hdr;
|
struct p80211_metawep p80211_wep;
|
|
p80211_wep.data = NULL;
|
|
if (!skb)
|
return NETDEV_TX_OK;
|
|
if (wlandev->state != WLAN_DEVICE_OPEN) {
|
result = 1;
|
goto failed;
|
}
|
|
memset(&p80211_hdr, 0, sizeof(p80211_hdr));
|
memset(&p80211_wep, 0, sizeof(p80211_wep));
|
|
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(p80211_hdr));
|
skb_pull(skb, sizeof(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) {
|
result = 1;
|
goto failed;
|
}
|
|
netif_trans_update(netdev);
|
|
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(struct net_device *dev)
|
{
|
struct wlandevice *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(struct wlandevice *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
|
* -EINVAL 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(struct net_device *dev,
|
struct ifreq *ifr, int cmd)
|
{
|
int result = 0;
|
struct p80211ioctl_req *req = (struct p80211ioctl_req *)ifr;
|
struct wlandevice *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 = -EINVAL;
|
goto bail;
|
}
|
|
if (cmd == P80211_IFTEST) {
|
result = 0;
|
goto bail;
|
} else if (cmd != P80211_IFREQ) {
|
result = -EINVAL;
|
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(struct net_device *dev, void *addr)
|
{
|
struct sockaddr *new_addr = addr;
|
struct p80211msg_dot11req_mibset dot11req;
|
struct p80211item_unk392 *mibattr;
|
struct p80211item_pstr6 *macaddr;
|
struct p80211item_uint32 *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 = (struct p80211item_pstr6 *)&mibattr->data;
|
resultcode = &dot11req.resultcode;
|
|
/* Set up a dot11req_mibset */
|
memset(&dot11req, 0, sizeof(dot11req));
|
dot11req.msgcode = DIDmsg_dot11req_mibset;
|
dot11req.msglen = sizeof(dot11req);
|
memcpy(dot11req.devname,
|
((struct wlandevice *)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 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_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(struct wlandevice *wlandev, struct device *physdev)
|
{
|
int result = 0;
|
struct net_device *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) {
|
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) {
|
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;
|
netdev->min_mtu = 68;
|
/* 2312 is max 802.11 payload, 20 is overhead,
|
* (ether + llc + snap) and another 8 for wep.
|
*/
|
netdev->max_mtu = (2312 - 20 - 8);
|
|
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(struct wlandevice *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(struct wlandevice *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(struct wlandevice *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(struct wlandevice *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(struct wlandevice *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(struct net_device *netdev)
|
{
|
struct wlandevice *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);
|
}
|
}
|
