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android-kvm / linux / 8808500f26a61757cb414da76b271bbd09d5958c / . / drivers / staging / wlan-ng / p80211netdev.c
blob: 11f84a829e14a4d4595259c6184963b0a0e00cd7 [file] [log] [blame]
/* 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.
*
* --------------------------------------------------------------------
*/
/*================================================================*/
/* System Includes */
#include <linux/version.h>
#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 <asm/bitops.h>
#include <asm/uaccess.h>
#include <asm/byteorder.h>
#ifdef SIOCETHTOOL
#include <linux/ethtool.h>
#endif
#if WIRELESS_EXT > 12
#include <net/iw_handler.h>
#endif
#include <net/net_namespace.h>
/*================================================================*/
/* Project Includes */
#include "version.h"
#include "wlan_compat.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"
/*================================================================*/
/* Local Constants */
/*================================================================*/
/* Local Macros */
/*================================================================*/
/* Local Types */
/*================================================================*/
/* Local Static Definitions */
#define __NO_VERSION__ /* prevent the static definition */
#ifdef CONFIG_PROC_FS
static struct proc_dir_entry *proc_p80211;
#endif
/*================================================================*/
/* Local Function Declarations */
/* Support functions */
static void p80211netdev_rx_bh(unsigned long arg);
/* netdevice method functions */
static int p80211knetdev_init( netdevice_t *netdev);
static struct net_device_stats* p80211knetdev_get_stats(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, UINT16 fc);
#ifdef CONFIG_PROC_FS
static int
p80211netdev_proc_read(
char *page,
char **start,
off_t offset,
int count,
int *eof,
void *data);
#endif
/*================================================================*/
/* Function Definitions */
/*----------------------------------------------------------------
* p80211knetdev_startup
*
* Initialize the wlandevice/netdevice part of 802.11 services at
* load time.
*
* Arguments:
* none
*
* Returns:
* nothing
----------------------------------------------------------------*/
void p80211netdev_startup(void)
{
DBFENTER;
#ifdef CONFIG_PROC_FS
if (init_net.proc_net != NULL) {
proc_p80211 = create_proc_entry(
"p80211",
(S_IFDIR|S_IRUGO|S_IXUGO),
init_net.proc_net);
}
#endif
DBFEXIT;
return;
}
/*----------------------------------------------------------------
* p80211knetdev_shutdown
*
* Shutdown the wlandevice/netdevice part of 802.11 services at
* unload time.
*
* Arguments:
* none
*
* Returns:
* nothing
----------------------------------------------------------------*/
void
p80211netdev_shutdown(void)
{
DBFENTER;
#ifdef CONFIG_PROC_FS
if (proc_p80211 != NULL) {
remove_proc_entry("p80211", init_net.proc_net);
}
#endif
DBFEXIT;
}
/*----------------------------------------------------------------
* 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)
{
DBFENTER;
/* 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 */
DBFEXIT;
return 0;
}
/*----------------------------------------------------------------
* p80211knetdev_get_stats
*
* Statistics retrieval for linux netdevices. Here we're reporting
* the Linux i/f level statistics. Hence, for the primary numbers,
* we don't want to report the numbers from the MIB. Eventually,
* it might be useful to collect some of the error counters though.
*
* Arguments:
* netdev Linux netdevice
*
* Returns:
* the address of the statistics structure
----------------------------------------------------------------*/
static struct net_device_stats*
p80211knetdev_get_stats(netdevice_t *netdev)
{
wlandevice_t *wlandev = (wlandevice_t*)netdev->priv;
DBFENTER;
/* TODO: review the MIB stats for items that correspond to
linux stats */
DBFEXIT;
return &(wlandev->linux_stats);
}
/*----------------------------------------------------------------
* 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 = (wlandevice_t*)(netdev->priv);
DBFENTER;
/* 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 ) {
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,3,43) )
netdev->interrupt = 0;
#endif
p80211netdev_start_queue(wlandev);
wlandev->state = WLAN_DEVICE_OPEN;
}
} else {
result = -EAGAIN;
}
DBFEXIT;
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 = (wlandevice_t*)(netdev->priv);
DBFENTER;
if ( wlandev->close != NULL ) {
result = wlandev->close(wlandev);
}
p80211netdev_stop_queue(wlandev);
wlandev->state = WLAN_DEVICE_CLOSED;
DBFEXIT;
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 )
{
DBFENTER;
/* Enqueue for post-irq processing */
skb_queue_tail(&wlandev->nsd_rxq, skb);
tasklet_schedule(&wlandev->rx_bh);
DBFEXIT;
return;
}
/*----------------------------------------------------------------
* p80211netdev_rx_bh
*
* Deferred processing of all received frames.
*
* Arguments:
* wlandev WLAN network device structure
* skb skbuff containing a full 802.11 frame.
* Returns:
* nothing
* Side effects:
*
----------------------------------------------------------------*/
static void p80211netdev_rx_bh(unsigned long arg)
{
wlandevice_t *wlandev = (wlandevice_t *) arg;
struct sk_buff *skb = NULL;
netdevice_t *dev = wlandev->netdev;
p80211_hdr_a3_t *hdr;
UINT16 fc;
DBFENTER;
/* 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;
wlandev->linux_stats.rx_packets++;
wlandev->linux_stats.rx_bytes += skb->len;
netif_rx_ni(skb);
continue;
} else {
hdr = (p80211_hdr_a3_t *)skb->data;
fc = ieee2host16(hdr->fc);
if (p80211_rx_typedrop(wlandev, fc)) {
dev_kfree_skb(skb);
continue;
}
/* perform mcast filtering */
if (wlandev->netdev->flags & IFF_ALLMULTI) {
/* allow my local address through */
if (memcmp(hdr->a1, wlandev->netdev->dev_addr, WLAN_ADDR_LEN) != 0) {
/* but reject anything else that isn't multicast */
if (!(hdr->a1[0] & 0x01)) {
dev_kfree_skb(skb);
continue;
}
}
}
if ( skb_p80211_to_ether(wlandev, wlandev->ethconv, skb) == 0 ) {
skb->dev->last_rx = jiffies;
wlandev->linux_stats.rx_packets++;
wlandev->linux_stats.rx_bytes += skb->len;
netif_rx_ni(skb);
continue;
}
WLAN_LOG_DEBUG(1, "p80211_to_ether failed.\n");
}
}
dev_kfree_skb(skb);
}
DBFEXIT;
}
/*----------------------------------------------------------------
* 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 = (wlandevice_t*)netdev->priv;
p80211_hdr_t p80211_hdr;
p80211_metawep_t p80211_wep;
DBFENTER;
if (skb == NULL) {
return 0;
}
if (wlandev->state != WLAN_DEVICE_OPEN) {
result = 1;
goto failed;
}
memset(&p80211_hdr, 0, sizeof(p80211_hdr_t));
memset(&p80211_wep, 0, sizeof(p80211_metawep_t));
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,38) )
if ( test_and_set_bit(0, (void*)&(netdev->tbusy)) != 0 ) {
/* We've been called w/ tbusy set, has the tx */
/* path stalled? */
WLAN_LOG_DEBUG(1, "called when tbusy set\n");
result = 1;
goto failed;
}
#else
if ( netif_queue_stopped(netdev) ) {
WLAN_LOG_DEBUG(1, "called when queue stopped.\n");
result = 1;
goto failed;
}
netif_stop_queue(netdev);
/* No timeout handling here, 2.3.38+ kernels call the
* timeout function directly.
* TODO: Add timeout handling.
*/
#endif
/* 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(skb->protocol != ETH_P_80211_RAW) {
p80211netdev_start_queue(wlandev);
WLAN_LOG_NOTICE(
"Tx attempt prior to association, frame dropped.\n");
wlandev->linux_stats.tx_dropped++;
result = 0;
goto failed;
}
break;
}
/* Check for raw transmits */
if(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_t));
skb_pull(skb, sizeof(p80211_hdr_t));
} else {
if ( skb_ether_to_p80211(wlandev, wlandev->ethconv, skb, &p80211_hdr, &p80211_wep) != 0 ) {
/* convert failed */
WLAN_LOG_DEBUG(1, "ether_to_80211(%d) failed.\n",
wlandev->ethconv);
result = 1;
goto failed;
}
}
if ( wlandev->txframe == NULL ) {
result = 1;
goto failed;
}
netdev->trans_start = jiffies;
wlandev->linux_stats.tx_packets++;
/* count only the packet payload */
wlandev->linux_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 */
p80211netdev_wake_queue(wlandev);
result = 0;
} else if ( txresult == 1 ) {
/* success, no more avail */
WLAN_LOG_DEBUG(3, "txframe success, no more bufs\n");
/* netdev->tbusy = 1; don't set here, irqhdlr */
/* may have already cleared it */
result = 0;
} else if ( txresult == 2 ) {
/* alloc failure, drop frame */
WLAN_LOG_DEBUG(3, "txframe returned alloc_fail\n");
result = 1;
} else {
/* buffer full or queue busy, drop frame. */
WLAN_LOG_DEBUG(3, "txframe returned full or busy\n");
result = 1;
}
failed:
/* Free up the WEP buffer if it's not the same as the skb */
if ((p80211_wep.data) && (p80211_wep.data != skb->data))
kfree(p80211_wep.data);
/* we always free the skb here, never in a lower level. */
if (!result)
dev_kfree_skb(skb);
DBFEXIT;
return result;
}
/*----------------------------------------------------------------
* p80211knetdev_set_multicast_list
*
* Called from higher lavers 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 = (wlandevice_t*)dev->priv;
DBFENTER;
/* TODO: real multicast support as well */
if (wlandev->set_multicast_list)
wlandev->set_multicast_list(wlandev, dev);
DBFEXIT;
}
#ifdef SIOCETHTOOL
static int p80211netdev_ethtool(wlandevice_t *wlandev, void __user *useraddr)
{
UINT32 ethcmd;
struct ethtool_drvinfo info;
struct ethtool_value edata;
memset(&info, 0, sizeof(info));
memset(&edata, 0, sizeof(edata));
if (copy_from_user(&ethcmd, 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);
// info.fw_version
// info.bus_info
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;
p80211ioctl_req_t *req = (p80211ioctl_req_t*)ifr;
wlandevice_t *wlandev = (wlandevice_t*)dev->priv;
UINT8 *msgbuf;
DBFENTER;
WLAN_LOG_DEBUG(2, "rx'd ioctl, cmd=%d, len=%d\n", cmd, req->len);
#if WIRELESS_EXT < 13
/* Is this a wireless extensions ioctl? */
if ((cmd >= SIOCIWFIRST) && (cmd <= SIOCIWLAST)) {
if ((result = p80211wext_support_ioctl(dev, ifr, cmd))
!= (-EOPNOTSUPP)) {
goto bail;
}
}
#endif
#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 */
if ((msgbuf = kmalloc( req->len, GFP_KERNEL))) {
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:
DBFEXIT;
return result; /* If allocate,copyfrom or copyto fails, return errno */
}
/*----------------------------------------------------------------
* 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;
p80211msg_dot11req_mibset_t dot11req;
p80211item_unk392_t *mibattr;
p80211item_pstr6_t *macaddr;
p80211item_uint32_t *resultcode;
int result = 0;
DBFENTER;
/* If we're running, we don't allow MAC address changes */
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,38) )
if ( dev->start) {
return -EBUSY;
}
#else
if (netif_running(dev)) {
return -EBUSY;
}
#endif
/* 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(p80211msg_dot11req_mibset_t));
dot11req.msgcode = DIDmsg_dot11req_mibset;
dot11req.msglen = sizeof(p80211msg_dot11req_mibset_t);
memcpy(dot11req.devname,
((wlandevice_t*)(dev->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 = WLAN_ADDR_LEN;
memcpy(&macaddr->data.data, new_addr->sa_data, WLAN_ADDR_LEN);
/* 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->priv, (UINT8*)&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) {
WLAN_LOG_ERROR(
"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);
}
DBFEXIT;
return result;
}
static int wlan_change_mtu(netdevice_t *dev, int new_mtu)
{
DBFENTER;
// 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;
DBFEXIT;
return 0;
}
/*----------------------------------------------------------------
* 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.
* 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)
{
int result = 0;
netdevice_t *dev;
DBFENTER;
/* 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 struct device */
dev = kmalloc(sizeof(netdevice_t), GFP_ATOMIC);
if ( dev == NULL ) {
WLAN_LOG_ERROR("Failed to alloc netdev.\n");
result = 1;
} else {
memset( dev, 0, sizeof(netdevice_t));
ether_setup(dev);
wlandev->netdev = dev;
dev->priv = wlandev;
dev->hard_start_xmit = p80211knetdev_hard_start_xmit;
dev->get_stats = p80211knetdev_get_stats;
#ifdef HAVE_PRIVATE_IOCTL
dev->do_ioctl = p80211knetdev_do_ioctl;
#endif
#ifdef HAVE_MULTICAST
dev->set_multicast_list = p80211knetdev_set_multicast_list;
#endif
dev->init = p80211knetdev_init;
dev->open = p80211knetdev_open;
dev->stop = p80211knetdev_stop;
#ifdef CONFIG_NET_WIRELESS
#if ((WIRELESS_EXT < 17) && (WIRELESS_EXT < 21))
dev->get_wireless_stats = p80211wext_get_wireless_stats;
#endif
#if WIRELESS_EXT > 12
dev->wireless_handlers = &p80211wext_handler_def;
#endif
#endif
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,38) )
dev->tbusy = 1;
dev->start = 0;
#else
netif_stop_queue(dev);
#endif
#ifdef HAVE_CHANGE_MTU
dev->change_mtu = wlan_change_mtu;
#endif
#ifdef HAVE_SET_MAC_ADDR
dev->set_mac_address = p80211knetdev_set_mac_address;
#endif
#ifdef HAVE_TX_TIMEOUT
dev->tx_timeout = &p80211knetdev_tx_timeout;
dev->watchdog_timeo = (wlan_watchdog * HZ) / 1000;
#endif
netif_carrier_off(dev);
}
DBFEXIT;
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.
* 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_unsetup(wlandevice_t *wlandev)
{
int result = 0;
DBFENTER;
tasklet_kill(&wlandev->rx_bh);
if (wlandev->netdev == NULL ) {
WLAN_LOG_ERROR("called without wlandev->netdev set.\n");
result = 1;
} else {
free_netdev(wlandev->netdev);
wlandev->netdev = NULL;
}
DBFEXIT;
return 0;
}
/*----------------------------------------------------------------
* 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)
{
int i = 0;
netdevice_t *dev = wlandev->netdev;
DBFENTER;
i = dev_alloc_name(wlandev->netdev, "wlan%d");
if (i >= 0) {
i = register_netdev(wlandev->netdev);
}
if (i != 0) {
return -EIO;
}
#if ( LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0) )
dev->name = wlandev->name;
#else
strcpy(wlandev->name, dev->name);
#endif
#ifdef CONFIG_PROC_FS
if (proc_p80211) {
wlandev->procdir = proc_mkdir(wlandev->name, proc_p80211);
if ( wlandev->procdir )
wlandev->procwlandev =
create_proc_read_entry("wlandev", 0,
wlandev->procdir,
p80211netdev_proc_read,
wlandev);
if (wlandev->nsd_proc_read)
create_proc_read_entry("nsd", 0,
wlandev->procdir,
wlandev->nsd_proc_read,
wlandev);
}
#endif
#ifdef CONFIG_HOTPLUG
p80211_run_sbin_hotplug(wlandev, WLAN_HOTPLUG_REGISTER);
#endif
DBFEXIT;
return 0;
}
/*----------------------------------------------------------------
* 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;
DBFENTER;
#ifdef CONFIG_HOTPLUG
p80211_run_sbin_hotplug(wlandev, WLAN_HOTPLUG_REMOVE);
#endif
#ifdef CONFIG_PROC_FS
if ( wlandev->procwlandev ) {
remove_proc_entry("wlandev", wlandev->procdir);
}
if ( wlandev->nsd_proc_read ) {
remove_proc_entry("nsd", wlandev->procdir);
}
if (wlandev->procdir) {
remove_proc_entry(wlandev->name, proc_p80211);
}
#endif
unregister_netdev(wlandev->netdev);
/* Now to clean out the rx queue */
while ( (skb = skb_dequeue(&wlandev->nsd_rxq)) ) {
dev_kfree_skb(skb);
}
DBFEXIT;
return 0;
}
#ifdef CONFIG_PROC_FS
/*----------------------------------------------------------------
* proc_read
*
* Read function for /proc/net/p80211/<device>/wlandev
*
* Arguments:
* buf
* start
* offset
* count
* eof
* data
* Returns:
* zero on success, non-zero otherwise.
* Call Context:
* Can be either interrupt or not.
----------------------------------------------------------------*/
static int
p80211netdev_proc_read(
char *page,
char **start,
off_t offset,
int count,
int *eof,
void *data)
{
char *p = page;
wlandevice_t *wlandev = (wlandevice_t *) data;
DBFENTER;
if (offset != 0) {
*eof = 1;
goto exit;
}
p += sprintf(p, "p80211 version: %s (%s)\n\n",
WLAN_RELEASE, WLAN_BUILD_DATE);
p += sprintf(p, "name : %s\n", wlandev->name);
p += sprintf(p, "nsd name : %s\n", wlandev->nsdname);
p += sprintf(p, "address : %02x:%02x:%02x:%02x:%02x:%02x\n",
wlandev->netdev->dev_addr[0], wlandev->netdev->dev_addr[1], wlandev->netdev->dev_addr[2],
wlandev->netdev->dev_addr[3], wlandev->netdev->dev_addr[4], wlandev->netdev->dev_addr[5]);
p += sprintf(p, "nsd caps : %s%s%s%s%s%s%s%s%s%s\n",
(wlandev->nsdcaps & P80211_NSDCAP_HARDWAREWEP) ? "wep_hw " : "",
(wlandev->nsdcaps & P80211_NSDCAP_TIEDWEP) ? "wep_tied " : "",
(wlandev->nsdcaps & P80211_NSDCAP_NOHOSTWEP) ? "wep_hw_only " : "",
(wlandev->nsdcaps & P80211_NSDCAP_PBCC) ? "pbcc " : "",
(wlandev->nsdcaps & P80211_NSDCAP_SHORT_PREAMBLE) ? "short_preamble " : "",
(wlandev->nsdcaps & P80211_NSDCAP_AGILITY) ? "agility " : "",
(wlandev->nsdcaps & P80211_NSDCAP_AP_RETRANSMIT) ? "ap_retransmit " : "",
(wlandev->nsdcaps & P80211_NSDCAP_HWFRAGMENT) ? "hw_frag " : "",
(wlandev->nsdcaps & P80211_NSDCAP_AUTOJOIN) ? "autojoin " : "",
(wlandev->nsdcaps & P80211_NSDCAP_NOSCAN) ? "" : "scan ");
p += sprintf(p, "bssid : %02x:%02x:%02x:%02x:%02x:%02x\n",
wlandev->bssid[0], wlandev->bssid[1], wlandev->bssid[2],
wlandev->bssid[3], wlandev->bssid[4], wlandev->bssid[5]);
p += sprintf(p, "Enabled : %s%s\n",
(wlandev->shortpreamble) ? "short_preamble " : "",
(wlandev->hostwep & HOSTWEP_PRIVACYINVOKED) ? "privacy" : "");
exit:
DBFEXIT;
return (p - page);
}
#endif
/*----------------------------------------------------------------
* 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)
{
DBFENTER;
wlandev->hwremoved = 1;
if ( wlandev->state == WLAN_DEVICE_OPEN) {
p80211netdev_stop_queue(wlandev);
}
netif_device_detach(wlandev->netdev);
DBFEXIT;
}
/*----------------------------------------------------------------
* 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, UINT16 fc)
{
UINT16 ftype;
UINT16 fstype;
int drop = 0;
/* Classify frame, increment counter */
ftype = WLAN_GET_FC_FTYPE(fc);
fstype = WLAN_GET_FC_FSTYPE(fc);
#if 0
WLAN_LOG_DEBUG(4,
"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;
}
WLAN_LOG_DEBUG(3, "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;
}
WLAN_LOG_DEBUG(3, "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:
WLAN_LOG_DEBUG(3, "rx'd data:null\n");
wlandev->rx.null++;
break;
case WLAN_FSTYPE_CFACK:
WLAN_LOG_DEBUG(3, "rx'd data:cfack\n");
wlandev->rx.cfack++;
break;
case WLAN_FSTYPE_CFPOLL:
WLAN_LOG_DEBUG(3, "rx'd data:cfpoll\n");
wlandev->rx.cfpoll++;
break;
case WLAN_FSTYPE_CFACK_CFPOLL:
WLAN_LOG_DEBUG(3, "rx'd data:cfack_cfpoll\n");
wlandev->rx.cfack_cfpoll++;
break;
default:
/* printk("unknown"); */
wlandev->rx.data_unknown++;
break;
}
break;
}
return drop;
}
#ifdef CONFIG_HOTPLUG
/* Notify userspace when a netdevice event occurs,
* by running '/sbin/hotplug net' with certain
* environment variables set.
*/
int p80211_run_sbin_hotplug(wlandevice_t *wlandev, char *action)
{
char *argv[3], *envp[7], ifname[12 + IFNAMSIZ], action_str[32];
char nsdname[32], wlan_wext[32];
int i;
if (wlandev) {
sprintf(ifname, "INTERFACE=%s", wlandev->name);
sprintf(nsdname, "NSDNAME=%s", wlandev->nsdname);
} else {
sprintf(ifname, "INTERFACE=null");
sprintf(nsdname, "NSDNAME=null");
}
sprintf(wlan_wext, "WLAN_WEXT=%s", wlan_wext_write ? "y" : "");
sprintf(action_str, "ACTION=%s", action);
i = 0;
argv[i++] = hotplug_path;
argv[i++] = "wlan";
argv[i] = NULL;
i = 0;
/* minimal command environment */
envp [i++] = "HOME=/";
envp [i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
envp [i++] = ifname;
envp [i++] = action_str;
envp [i++] = nsdname;
envp [i++] = wlan_wext;
envp [i] = NULL;
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,62))
return call_usermodehelper(argv [0], argv, envp);
#else
return call_usermodehelper(argv [0], argv, envp, 0);
#endif
}
#endif
void p80211_suspend(wlandevice_t *wlandev)
{
DBFENTER;
#ifdef CONFIG_HOTPLUG
p80211_run_sbin_hotplug(wlandev, WLAN_HOTPLUG_SUSPEND);
#endif
DBFEXIT;
}
void p80211_resume(wlandevice_t *wlandev)
{
DBFENTER;
#ifdef CONFIG_HOTPLUG
p80211_run_sbin_hotplug(wlandev, WLAN_HOTPLUG_RESUME);
#endif
DBFEXIT;
}
static void p80211knetdev_tx_timeout( netdevice_t *netdev)
{
wlandevice_t *wlandev = (wlandevice_t*)netdev->priv;
DBFENTER;
if (wlandev->tx_timeout) {
wlandev->tx_timeout(wlandev);
} else {
WLAN_LOG_WARNING("Implement tx_timeout for %s\n",
wlandev->nsdname);
p80211netdev_wake_queue(wlandev);
}
DBFEXIT;
}