net80211.c File Reference

802.11 device management More...

#include <string.h>
#include <byteswap.h>
#include <stdlib.h>
#include <gpxe/settings.h>
#include <gpxe/if_arp.h>
#include <gpxe/ethernet.h>
#include <gpxe/ieee80211.h>
#include <gpxe/netdevice.h>
#include <gpxe/net80211.h>
#include <gpxe/sec80211.h>
#include <gpxe/timer.h>
#include <gpxe/nap.h>
#include <unistd.h>
#include <errno.h>

Go to the source code of this file.

Data Structures

struct  net80211_rx_info
 Information associated with a received management packet. More...
struct  net80211_probe_ctx
 Context for a probe operation. More...
struct  net80211_assoc_ctx
 Context for the association task. More...

Defines

#define EINVAL_PKT_TOO_SHORT   ( EINVAL | EUNIQ_01 )
#define EINVAL_PKT_VERSION   ( EINVAL | EUNIQ_02 )
#define EINVAL_PKT_NOT_DATA   ( EINVAL | EUNIQ_03 )
#define EINVAL_PKT_NOT_FROMDS   ( EINVAL | EUNIQ_04 )
#define EINVAL_PKT_LLC_HEADER   ( EINVAL | EUNIQ_05 )
#define EINVAL_CRYPTO_REQUEST   ( EINVAL | EUNIQ_06 )
#define EINVAL_ACTIVE_SCAN   ( EINVAL | EUNIQ_07 )
#define E80211_STATUS(stat)
 Make return status code from 802.11 status code.
#define E80211_REASON(reas)
 Make return status code from 802.11 reason code.
#define NET80211_PROBE_GATHER   1
 Seconds to wait after finding a network, to possibly find better APs for it.
#define NET80211_PROBE_GATHER_ALL   2
 Seconds to wait after finding a network, to possibly find other networks.
#define NET80211_PROBE_TIMEOUT   6
 Seconds to allow a probe to take if no network has been found.
#define ASSOC_TIMEOUT   TICKS_PER_SEC
 Number of ticks to wait for replies to association management frames.
#define ASSOC_RETRIES   2
 Number of times to try sending a particular association management frame.
#define LQ_SMOOTH   7
 Smoothing factor (1-7) for link quality calculation.

Functions

 FILE_LICENCE (GPL2_OR_LATER)
static int net80211_netdev_open (struct net_device *netdev)
 Open 802.11 device and start association.
static void net80211_netdev_close (struct net_device *netdev)
 Close 802.11 device.
static int net80211_netdev_transmit (struct net_device *netdev, struct io_buffer *iobuf)
 Transmit packet on 802.11 device.
static void net80211_netdev_poll (struct net_device *netdev)
 Poll 802.11 device for received packets and completed transmissions.
static void net80211_netdev_irq (struct net_device *netdev, int enable)
 Enable or disable interrupts for 802.11 device.
static int net80211_ll_push (struct net_device *netdev, struct io_buffer *iobuf, const void *ll_dest, const void *ll_source, uint16_t net_proto)
 Add 802.11 link-layer header.
static int net80211_ll_pull (struct net_device *netdev, struct io_buffer *iobuf, const void **ll_dest, const void **ll_source, uint16_t *net_proto)
static void net80211_add_channels (struct net80211_device *dev, int start, int len, int txpower)
 Add channels to 802.11 device.
static void net80211_filter_hw_channels (struct net80211_device *dev)
 Filter 802.11 device channels for hardware capabilities.
static void net80211_set_rtscts_rate (struct net80211_device *dev)
 Pick TX rate for RTS/CTS packets based on data rate.
static int net80211_process_capab (struct net80211_device *dev, u16 capab)
 Update 802.11 device state to reflect received capabilities field.
static int net80211_process_ie (struct net80211_device *dev, union ieee80211_ie *ie, void *ie_end)
 Update 802.11 device state to reflect received information elements.
static union ieee80211_ie * net80211_marshal_request_info (struct net80211_device *dev, union ieee80211_ie *ie)
 Create information elements for outgoing probe or association packet.
static void net80211_step_associate (struct process *proc)
 Step 802.11 association process.
static void net80211_handle_auth (struct net80211_device *dev, struct io_buffer *iob)
 Handle receipt of 802.11 authentication frame.
static void net80211_handle_assoc_reply (struct net80211_device *dev, struct io_buffer *iob)
 Handle receipt of 802.11 association reply frame.
static int net80211_send_disassoc (struct net80211_device *dev, int reason, int deauth)
 Send 802.11 disassociation frame.
static void net80211_handle_mgmt (struct net80211_device *dev, struct io_buffer *iob, int signal)
 Handle receipt of 802.11 management frame.
static void net80211_free_frags (struct net80211_device *dev, int fcid)
 Free buffers used by 802.11 fragment cache entry.
static struct io_buffer * net80211_accum_frags (struct net80211_device *dev, int fcid, int nfrags, int size)
 Accumulate 802.11 fragments into one I/O buffer.
static void net80211_rx_frag (struct net80211_device *dev, struct io_buffer *iob, int signal)
 Handle receipt of 802.11 fragment.
static int net80211_check_settings_update (void)
 Check for 802.11 SSID or key updates.
static int net80211_rate_is_erp (u16 rate)
 Determine whether a transmission rate uses ERP/OFDM.
u16 net80211_duration (struct net80211_device *dev, int bytes, u16 rate)
 Calculate one frame's contribution to 802.11 duration field.
static int net80211_ll_pull (struct net_device *netdev __unused, struct io_buffer *iobuf, const void **ll_dest, const void **ll_source, uint16_t *net_proto)
 Remove 802.11 link-layer header.
struct net80211_device * net80211_get (struct net_device *netdev)
 Get 802.11 device from wrapping network device.
int net80211_keep_mgmt (struct net80211_device *dev, int enable)
 Set state of 802.11 device keeping management frames.
struct io_buffer * net80211_mgmt_dequeue (struct net80211_device *dev, int *signal)
 Get 802.11 management frame.
int net80211_tx_mgmt (struct net80211_device *dev, u16 fc, u8 dest[6], struct io_buffer *iob)
 Transmit 802.11 management frame.
struct net80211_device * net80211_alloc (size_t priv_size)
 Allocate 802.11 device.
int net80211_register (struct net80211_device *dev, struct net80211_device_operations *ops, struct net80211_hw_info *hw)
 Register 802.11 device with network stack.
void net80211_unregister (struct net80211_device *dev)
 Unregister 802.11 device from network stack.
void net80211_free (struct net80211_device *dev)
 Free 802.11 device.
static void net80211_set_state (struct net80211_device *dev, short clear, short set, u16 status)
 Set state of 802.11 device.
struct net80211_probe_ctx * net80211_probe_start (struct net80211_device *dev, const char *essid, int active)
 Begin probe of 802.11 networks.
int net80211_probe_step (struct net80211_probe_ctx *ctx)
 Continue probe of 802.11 networks.
struct net80211_wlan * net80211_probe_finish_best (struct net80211_probe_ctx *ctx)
 Finish probe of 802.11 networks, returning best-signal network found.
struct list_head * net80211_probe_finish_all (struct net80211_probe_ctx *ctx)
 Finish probe of 802.11 networks, returning all networks found.
void net80211_free_wlan (struct net80211_wlan *wlan)
 Free WLAN structure.
void net80211_free_wlanlist (struct list_head *list)
 Free list of WLAN structures.
void net80211_autoassociate (struct net80211_device *dev)
 Start 802.11 association process.
void net80211_set_rate_idx (struct net80211_device *dev, int rate)
 Set data transmission rate for 802.11 device.
int net80211_change_channel (struct net80211_device *dev, int channel)
 Configure 802.11 device to transmit on a certain channel.
int net80211_prepare_probe (struct net80211_device *dev, int band, int active)
 Prepare 802.11 device channel and rate set for scanning.
int net80211_prepare_assoc (struct net80211_device *dev, struct net80211_wlan *wlan)
 Prepare 802.11 device channel and rate set for communication.
int net80211_send_auth (struct net80211_device *dev, struct net80211_wlan *wlan, int method)
 Send 802.11 initial authentication frame.
int net80211_send_assoc (struct net80211_device *dev, struct net80211_wlan *wlan)
 Send 802.11 association frame.
void net80211_deauthenticate (struct net80211_device *dev, int rc)
 Deauthenticate from current network and try again.
static void net80211_update_link_quality (struct net80211_device *dev, struct io_buffer *iob)
 Update link quality information based on received beacon.
void net80211_rx (struct net80211_device *dev, struct io_buffer *iob, int signal, u16 rate)
 Handle receipt of 802.11 frame.
void net80211_rx_err (struct net80211_device *dev, struct io_buffer *iob, int rc)
 Indicate an error in receiving a packet.
void net80211_tx_complete (struct net80211_device *dev, struct io_buffer *iob, int retries, int rc)
 Indicate the completed transmission of a packet.

Variables

static struct list_head net80211_devices = LIST_HEAD_INIT ( net80211_devices )
 List of 802.11 devices.
static struct
net80211_device_operations 		net80211_null_ops
 Set of device operations that does nothing.
struct settings_applicator
net80211_applicator 		__settings_applicator
 802.11 settings applicator
struct setting
net80211_ssid_setting 		__setting
 The network name to associate with.
static struct net_device_operations net80211_netdev_ops
 Network device operations for a wrapped 802.11 device.
static u8 net80211_ll_broadcast [] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }
 802.11 broadcast MAC address
static struct ll_protocol
net80211_ll_protocol 		__ll_protocol
 802.11 link-layer protocol

Detailed Description

802.11 device management

Definition in file net80211.c.

Define Documentation

#define EINVAL_PKT_TOO_SHORT   ( EINVAL | EUNIQ_01 )

Definition at line 44 of file net80211.c.

Referenced by net80211_ll_pull().

#define EINVAL_PKT_VERSION   ( EINVAL | EUNIQ_02 )

Definition at line 45 of file net80211.c.

Referenced by net80211_ll_pull().

#define EINVAL_PKT_NOT_DATA   ( EINVAL | EUNIQ_03 )

Definition at line 46 of file net80211.c.

Referenced by net80211_ll_pull().

#define EINVAL_PKT_NOT_FROMDS   ( EINVAL | EUNIQ_04 )

Definition at line 47 of file net80211.c.

Referenced by net80211_ll_pull().

#define EINVAL_PKT_LLC_HEADER   ( EINVAL | EUNIQ_05 )

Definition at line 48 of file net80211.c.

Referenced by net80211_ll_pull().

#define EINVAL_CRYPTO_REQUEST   ( EINVAL | EUNIQ_06 )

Definition at line 49 of file net80211.c.

Referenced by net80211_rx(), and net80211_tx_mgmt().

#define EINVAL_ACTIVE_SCAN   ( EINVAL | EUNIQ_07 )

Definition at line 50 of file net80211.c.

Referenced by net80211_prepare_probe().

#define E80211_STATUS ( stat   ) 

Value:

( ((stat & 0x20)? EHOSTUNREACH : ECONNREFUSED) \
                                        | ((stat & 0x1f) << 8) )
Make return status code from 802.11 status code.

Definition at line 73 of file net80211.c.

Referenced by net80211_set_state().

#define E80211_REASON ( reas   ) 

Value:

( ((reas & 0x20)? ENETRESET : ECONNRESET) \
                                        | ((reas & 0x1f) << 8) )
Make return status code from 802.11 reason code.

Definition at line 77 of file net80211.c.

Referenced by net80211_set_state().

#define NET80211_PROBE_GATHER   1

Seconds to wait after finding a network, to possibly find better APs for it.

This is used when a specific SSID to scan for is specified.

Definition at line 1267 of file net80211.c.

Referenced by net80211_probe_step().

#define NET80211_PROBE_GATHER_ALL   2

Seconds to wait after finding a network, to possibly find other networks.

This is used when an empty SSID is specified, to scan for all networks.

Definition at line 1274 of file net80211.c.

Referenced by net80211_probe_step().

#define NET80211_PROBE_TIMEOUT   6

Seconds to allow a probe to take if no network has been found.

Definition at line 1277 of file net80211.c.

Referenced by net80211_probe_step().

#define ASSOC_TIMEOUT   TICKS_PER_SEC

Number of ticks to wait for replies to association management frames.

Definition at line 1647 of file net80211.c.

Referenced by net80211_step_associate().

#define ASSOC_RETRIES   2

Number of times to try sending a particular association management frame.

Definition at line 1650 of file net80211.c.

Referenced by net80211_step_associate().

#define LQ_SMOOTH   7

Smoothing factor (1-7) for link quality calculation.

Definition at line 2414 of file net80211.c.

Referenced by net80211_update_link_quality().

Function Documentation

FILE_LICENCE ( GPL2_OR_LATER   ) 

static int net80211_rate_is_erp ( u16  rate  )  [inline, static]

Determine whether a transmission rate uses ERP/OFDM.

Parameters:
rate Rate in 100 kbps units
Return values:
is_erp TRUE if the rate is an ERP/OFDM rate
802.11b supports rates of 1.0, 2.0, 5.5, and 11.0 Mbps; any other rate than these on the 2.4GHz spectrum is an ERP (802.11g) rate.

Definition at line 422 of file net80211.c.

Referenced by net80211_duration().

00423 {
00424         if ( rate == 10 || rate == 20 || rate == 55 || rate == 110 )
00425                 return 0;
00426         return 1;
00427 }

static int net80211_ll_pull ( struct net_device *netdev  __unused,
struct io_buffer *  iobuf,
const void **  ll_dest,
const void **  ll_source,
uint16_t *  net_proto 
) [static]

Remove 802.11 link-layer header.

Parameters:
netdev Wrapping network device
iobuf I/O buffer
Return values:
ll_dest Link-layer destination address
ll_source Link-layer source
net_proto Network-layer protocol, in network byte order
rc Return status code
This expects and removes both the 802.11 frame header and the 802.2 LLC/SNAP header that are used on data packets.

Definition at line 559 of file net80211.c.

References ieee80211_frame::addr1, ieee80211_frame::addr3, ieee80211_llc_snap_header::ctrl, io_buffer::data, DBGC, ieee80211_llc_snap_header::dsap, EINVAL_PKT_LLC_HEADER, EINVAL_PKT_NOT_DATA, EINVAL_PKT_NOT_FROMDS, EINVAL_PKT_TOO_SHORT, EINVAL_PKT_VERSION, ieee80211_llc_snap_header::ethertype, ieee80211_frame::fc, IEEE80211_FC_FROMDS, IEEE80211_FC_SUBTYPE, IEEE80211_FC_TODS, IEEE80211_FC_TYPE, IEEE80211_FC_VERSION, IEEE80211_LLC_CTRL, IEEE80211_LLC_DSAP, IEEE80211_LLC_HEADER_LEN, IEEE80211_LLC_SSAP, IEEE80211_STYPE_DATA, IEEE80211_THIS_VERSION, IEEE80211_TYP_FRAME_HEADER_LEN, IEEE80211_TYPE_DATA, iob_len(), iob_pull, netdev, ieee80211_llc_snap_header::oui, net_device::priv, and ieee80211_llc_snap_header::ssap.

00563 {
00564         struct ieee80211_frame *hdr = iobuf->data;
00565         struct ieee80211_llc_snap_header *lhdr =
00566                 ( void * ) hdr + IEEE80211_TYP_FRAME_HEADER_LEN;
00567 
00568         /* Bunch of sanity checks */
00569         if ( iob_len ( iobuf ) < IEEE80211_TYP_FRAME_HEADER_LEN +
00570              IEEE80211_LLC_HEADER_LEN ) {
00571                 DBGC ( netdev->priv, "802.11 %p packet too short (%zd bytes)\n",
00572                        netdev->priv, iob_len ( iobuf ) );
00573                 return -EINVAL_PKT_TOO_SHORT;
00574         }
00575 
00576         if ( ( hdr->fc & IEEE80211_FC_VERSION ) != IEEE80211_THIS_VERSION ) {
00577                 DBGC ( netdev->priv, "802.11 %p packet invalid version %04x\n",
00578                        netdev->priv, hdr->fc & IEEE80211_FC_VERSION );
00579                 return -EINVAL_PKT_VERSION;
00580         }
00581 
00582         if ( ( hdr->fc & IEEE80211_FC_TYPE ) != IEEE80211_TYPE_DATA ||
00583              ( hdr->fc & IEEE80211_FC_SUBTYPE ) != IEEE80211_STYPE_DATA ) {
00584                 DBGC ( netdev->priv, "802.11 %p packet not data/data (fc=%04x)\n",
00585                        netdev->priv, hdr->fc );
00586                 return -EINVAL_PKT_NOT_DATA;
00587         }
00588 
00589         if ( ( hdr->fc & ( IEEE80211_FC_TODS | IEEE80211_FC_FROMDS ) ) !=
00590              IEEE80211_FC_FROMDS ) {
00591                 DBGC ( netdev->priv, "802.11 %p packet not from DS (fc=%04x)\n",
00592                        netdev->priv, hdr->fc );
00593                 return -EINVAL_PKT_NOT_FROMDS;
00594         }
00595 
00596         if ( lhdr->dsap != IEEE80211_LLC_DSAP || lhdr->ssap != IEEE80211_LLC_SSAP ||
00597              lhdr->ctrl != IEEE80211_LLC_CTRL || lhdr->oui[0] || lhdr->oui[1] ||
00598              lhdr->oui[2] ) {
00599                 DBGC ( netdev->priv, "802.11 %p LLC header is not plain EtherType "
00600                        "encapsulator: %02x->%02x [%02x] %02x:%02x:%02x %04x\n",
00601                        netdev->priv, lhdr->dsap, lhdr->ssap, lhdr->ctrl,
00602                        lhdr->oui[0], lhdr->oui[1], lhdr->oui[2], lhdr->ethertype );
00603                 return -EINVAL_PKT_LLC_HEADER;
00604         }
00605 
00606         iob_pull ( iobuf, sizeof ( *hdr ) + sizeof ( *lhdr ) );
00607 
00608         *ll_dest = hdr->addr1;
00609         *ll_source = hdr->addr3;
00610         *net_proto = lhdr->ethertype;
00611         return 0;
00612 }

int net80211_tx_mgmt ( struct net80211_device *  dev,
u16  fc,
u8  dest[6],
struct io_buffer *  iob 
)

Transmit 802.11 management frame.

Parameters:
dev 802.11 device
fc Frame Control flags for management frame
dest Destination access point
iob I/O buffer
Return values:
rc Return status code
The fc argument must contain at least an IEEE 802.11 management subtype number (e.g. IEEE80211_STYPE_PROBE_REQ). If it contains IEEE80211_FC_PROTECTED, the frame will be encrypted prior to transmission.

It is required that iob have at least 24 bytes of headroom reserved before its data start.

Definition at line 723 of file net80211.c.

References ieee80211_frame::addr1, ieee80211_frame::addr2, ieee80211_frame::addr3, net80211_device::crypto, ieee80211_frame::duration, EINVAL_CRYPTO_REQUEST, net80211_crypto::encrypt, ETH_ALEN, ieee80211_frame::fc, free_iob(), IEEE80211_FC_PROTECTED, IEEE80211_MAKESEQ, IEEE80211_THIS_VERSION, IEEE80211_TYP_FRAME_HEADER_LEN, IEEE80211_TYPE_MGMT, iob_push, net80211_device::last_tx_seqnr, net_device::ll_addr, memcpy, net80211_duration(), net80211_device::netdev, netdev_tx(), net80211_device::rate, net80211_device::rates, and ieee80211_frame::seq.

Referenced by net80211_probe_step(), net80211_send_assoc(), net80211_send_auth(), and net80211_send_disassoc().

00725 {
00726         struct ieee80211_frame *hdr = iob_push ( iob,
00727                                                  IEEE80211_TYP_FRAME_HEADER_LEN );
00728 
00729         hdr->fc = IEEE80211_THIS_VERSION | IEEE80211_TYPE_MGMT |
00730             ( fc & ~IEEE80211_FC_PROTECTED );
00731         hdr->duration = net80211_duration ( dev, 10, dev->rates[dev->rate] );
00732         hdr->seq = IEEE80211_MAKESEQ ( ++dev->last_tx_seqnr, 0 );
00733 
00734         memcpy ( hdr->addr1, dest, ETH_ALEN );  /* DA = RA */
00735         memcpy ( hdr->addr2, dev->netdev->ll_addr, ETH_ALEN );  /* SA = TA */
00736         memcpy ( hdr->addr3, dest, ETH_ALEN );  /* BSSID */
00737 
00738         if ( fc & IEEE80211_FC_PROTECTED ) {
00739                 if ( ! dev->crypto )
00740                         return -EINVAL_CRYPTO_REQUEST;
00741 
00742                 struct io_buffer *eiob = dev->crypto->encrypt ( dev->crypto,
00743                                                                 iob );
00744                 free_iob ( iob );
00745                 iob = eiob;
00746         }
00747 
00748         return netdev_tx ( dev->netdev, iob );
00749 }

static void net80211_set_state ( struct net80211_device *  dev,
short  clear,
short  set,
u16  status 
) [inline, static]

Set state of 802.11 device.

Parameters:
dev 802.11 device
clear Bitmask of flags to clear
set Bitmask of flags to set
status Status or reason code for most recent operation
If status represents a reason code, it should be OR'ed with NET80211_IS_REASON.

Clearing authentication also clears association; clearing association also clears security handshaking state. Clearing association removes the link-up flag from the wrapping net_device, but setting it does not automatically set the flag; that is left to the judgment of higher-level code.

Definition at line 874 of file net80211.c.

References net80211_device::assoc_rc, net80211_device_operations::config, E80211_REASON, E80211_STATUS, NET80211_ASSOCIATED, NET80211_AUTHENTICATED, NET80211_CFG_ASSOC, NET80211_CRYPTO_SYNCED, NET80211_IS_REASON, NET80211_PROBED, NET80211_STATUS_MASK, net80211_device::netdev, netdev_link_down(), netdev_link_err(), net80211_device::op, and net80211_device::state.

Referenced by net80211_autoassociate(), net80211_handle_assoc_reply(), net80211_handle_auth(), net80211_handle_mgmt(), net80211_prepare_assoc(), net80211_send_assoc(), net80211_send_auth(), and net80211_send_disassoc().

00877 {
00878         /* The conditions in this function are deliberately formulated
00879            to be decidable at compile-time in most cases. Since clear
00880            and set are generally passed as constants, the body of this
00881            function can be reduced down to a few statements by the
00882            compiler. */
00883 
00884         const int statmsk = NET80211_STATUS_MASK | NET80211_IS_REASON;
00885 
00886         if ( clear & NET80211_PROBED )
00887                 clear |= NET80211_AUTHENTICATED;
00888 
00889         if ( clear & NET80211_AUTHENTICATED )
00890                 clear |= NET80211_ASSOCIATED;
00891 
00892         if ( clear & NET80211_ASSOCIATED )
00893                 clear |= NET80211_CRYPTO_SYNCED;
00894 
00895         dev->state = ( dev->state & ~clear ) | set;
00896         dev->state = ( dev->state & ~statmsk ) | ( status & statmsk );
00897 
00898         if ( clear & NET80211_ASSOCIATED )
00899                 netdev_link_down ( dev->netdev );
00900 
00901         if ( ( clear | set ) & NET80211_ASSOCIATED )
00902                 dev->op->config ( dev, NET80211_CFG_ASSOC );
00903 
00904         if ( status != 0 ) {
00905                 if ( status & NET80211_IS_REASON )
00906                         dev->assoc_rc = -E80211_REASON ( status );
00907                 else
00908                         dev->assoc_rc = -E80211_STATUS ( status );
00909                 netdev_link_err ( dev->netdev, dev->assoc_rc );
00910         }
00911 }

static void net80211_update_link_quality ( struct net80211_device *  dev,
struct io_buffer *  iob 
) [static]

Update link quality information based on received beacon.

Parameters:
dev 802.11 device
iob I/O buffer containing beacon
Return values:
rc Return status code

Definition at line 2423 of file net80211.c.

References ieee80211_frame::data, io_buffer::data, ieee80211_beacon, net80211_device::last_beacon_timestamp, LQ_SMOOTH, NET80211_ASSOCIATED, net80211_device::rx_beacon_interval, net80211_device::state, and u32.

Referenced by net80211_handle_mgmt().

02425 {
02426         struct ieee80211_frame *hdr = iob->data;
02427         struct ieee80211_beacon *beacon;
02428         u32 dt, rxi;
02429 
02430         if ( ! ( dev->state & NET80211_ASSOCIATED ) )
02431                 return;
02432 
02433         beacon = ( struct ieee80211_beacon * ) hdr->data;
02434         dt = ( u32 ) ( beacon->timestamp - dev->last_beacon_timestamp );
02435         rxi = dev->rx_beacon_interval;
02436 
02437         rxi = ( LQ_SMOOTH * rxi ) + ( ( 8 - LQ_SMOOTH ) * dt );
02438         dev->rx_beacon_interval = rxi >> 3;
02439 
02440         dev->last_beacon_timestamp = beacon->timestamp;
02441 }

Variable Documentation

struct list_head net80211_devices = LIST_HEAD_INIT ( net80211_devices ) [static]

List of 802.11 devices.

Definition at line 82 of file net80211.c.

struct net80211_device_operations net80211_null_ops [static]

Set of device operations that does nothing.

Definition at line 85 of file net80211.c.

Referenced by net80211_alloc(), net80211_netdev_open(), and net80211_unregister().

struct net_device_operations net80211_netdev_ops [static]

Initial value:

 {
        .open = net80211_netdev_open,
        .close = net80211_netdev_close,
        .transmit = net80211_netdev_transmit,
        .poll = net80211_netdev_poll,
        .irq = net80211_netdev_irq,
}
Network device operations for a wrapped 802.11 device.

Definition at line 399 of file net80211.c.

u8 net80211_ll_broadcast[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff } [static]

802.11 broadcast MAC address

Definition at line 411 of file net80211.c.

Referenced by net80211_alloc(), and net80211_probe_step().

struct ll_protocol net80211_ll_protocol __ll_protocol [static]

Initial value:

 {
        .name = "802.11",
        .push = net80211_ll_push,
        .pull = net80211_ll_pull,
        .init_addr = eth_init_addr,
        .ntoa = eth_ntoa,
        .mc_hash = eth_mc_hash,
        .eth_addr = eth_eth_addr,
        .ll_proto = htons ( ARPHRD_ETHER ),     
        .hw_addr_len = ETH_ALEN,
        .ll_addr_len = ETH_ALEN,
        .ll_header_len = IEEE80211_TYP_FRAME_HEADER_LEN +
                                IEEE80211_LLC_HEADER_LEN,
}
802.11 link-layer protocol

Definition at line 615 of file net80211.c.

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