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util.c
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util.c
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/*
* Copyright 2002-2005, Instant802 Networks, Inc.
* Copyright 2005-2006, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* utilities for mac80211
*/
#include <net/mac80211.h>
#include <linux/netdevice.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/bitmap.h>
#include <linux/crc32.h>
#include <net/net_namespace.h>
#include <net/cfg80211.h>
#include <net/rtnetlink.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
#include "rate.h"
#include "mesh.h"
#include "wme.h"
#include "led.h"
#include "wep.h"
/* privid for wiphys to determine whether they belong to us or not */
void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
{
struct ieee80211_local *local;
BUG_ON(!wiphy);
local = wiphy_priv(wiphy);
return &local->hw;
}
EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
enum nl80211_iftype type)
{
__le16 fc = hdr->frame_control;
/* drop ACK/CTS frames and incorrect hdr len (ctrl) */
if (len < 16)
return NULL;
if (ieee80211_is_data(fc)) {
if (len < 24) /* drop incorrect hdr len (data) */
return NULL;
if (ieee80211_has_a4(fc))
return NULL;
if (ieee80211_has_tods(fc))
return hdr->addr1;
if (ieee80211_has_fromds(fc))
return hdr->addr2;
return hdr->addr3;
}
if (ieee80211_is_mgmt(fc)) {
if (len < 24) /* drop incorrect hdr len (mgmt) */
return NULL;
return hdr->addr3;
}
if (ieee80211_is_ctl(fc)) {
if(ieee80211_is_pspoll(fc))
return hdr->addr1;
if (ieee80211_is_back_req(fc)) {
switch (type) {
case NL80211_IFTYPE_STATION:
return hdr->addr2;
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_AP_VLAN:
return hdr->addr1;
default:
break; /* fall through to the return */
}
}
}
return NULL;
}
void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
{
struct sk_buff *skb = tx->skb;
struct ieee80211_hdr *hdr;
do {
hdr = (struct ieee80211_hdr *) skb->data;
hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
} while ((skb = skb->next));
}
int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
int rate, int erp, int short_preamble)
{
int dur;
/* calculate duration (in microseconds, rounded up to next higher
* integer if it includes a fractional microsecond) to send frame of
* len bytes (does not include FCS) at the given rate. Duration will
* also include SIFS.
*
* rate is in 100 kbps, so divident is multiplied by 10 in the
* DIV_ROUND_UP() operations.
*/
if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) {
/*
* OFDM:
*
* N_DBPS = DATARATE x 4
* N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
* (16 = SIGNAL time, 6 = tail bits)
* TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
*
* T_SYM = 4 usec
* 802.11a - 17.5.2: aSIFSTime = 16 usec
* 802.11g - 19.8.4: aSIFSTime = 10 usec +
* signal ext = 6 usec
*/
dur = 16; /* SIFS + signal ext */
dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
4 * rate); /* T_SYM x N_SYM */
} else {
/*
* 802.11b or 802.11g with 802.11b compatibility:
* 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
* Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
*
* 802.11 (DS): 15.3.3, 802.11b: 18.3.4
* aSIFSTime = 10 usec
* aPreambleLength = 144 usec or 72 usec with short preamble
* aPLCPHeaderLength = 48 usec or 24 usec with short preamble
*/
dur = 10; /* aSIFSTime = 10 usec */
dur += short_preamble ? (72 + 24) : (144 + 48);
dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
}
return dur;
}
/* Exported duration function for driver use */
__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
size_t frame_len,
struct ieee80211_rate *rate)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
u16 dur;
int erp;
bool short_preamble = false;
erp = 0;
if (vif) {
sdata = vif_to_sdata(vif);
short_preamble = sdata->vif.bss_conf.use_short_preamble;
if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
erp = rate->flags & IEEE80211_RATE_ERP_G;
}
dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp,
short_preamble);
return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_generic_frame_duration);
__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
struct ieee80211_vif *vif, size_t frame_len,
const struct ieee80211_tx_info *frame_txctl)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_rate *rate;
struct ieee80211_sub_if_data *sdata;
bool short_preamble;
int erp;
u16 dur;
struct ieee80211_supported_band *sband;
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
short_preamble = false;
rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
erp = 0;
if (vif) {
sdata = vif_to_sdata(vif);
short_preamble = sdata->vif.bss_conf.use_short_preamble;
if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
erp = rate->flags & IEEE80211_RATE_ERP_G;
}
/* CTS duration */
dur = ieee80211_frame_duration(local, 10, rate->bitrate,
erp, short_preamble);
/* Data frame duration */
dur += ieee80211_frame_duration(local, frame_len, rate->bitrate,
erp, short_preamble);
/* ACK duration */
dur += ieee80211_frame_duration(local, 10, rate->bitrate,
erp, short_preamble);
return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_rts_duration);
__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
size_t frame_len,
const struct ieee80211_tx_info *frame_txctl)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_rate *rate;
struct ieee80211_sub_if_data *sdata;
bool short_preamble;
int erp;
u16 dur;
struct ieee80211_supported_band *sband;
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
short_preamble = false;
rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
erp = 0;
if (vif) {
sdata = vif_to_sdata(vif);
short_preamble = sdata->vif.bss_conf.use_short_preamble;
if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
erp = rate->flags & IEEE80211_RATE_ERP_G;
}
/* Data frame duration */
dur = ieee80211_frame_duration(local, frame_len, rate->bitrate,
erp, short_preamble);
if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
/* ACK duration */
dur += ieee80211_frame_duration(local, 10, rate->bitrate,
erp, short_preamble);
}
return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_ctstoself_duration);
static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
enum queue_stop_reason reason)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
trace_wake_queue(local, queue, reason);
if (WARN_ON(queue >= hw->queues))
return;
__clear_bit(reason, &local->queue_stop_reasons[queue]);
if (local->queue_stop_reasons[queue] != 0)
/* someone still has this queue stopped */
return;
if (skb_queue_empty(&local->pending[queue])) {
rcu_read_lock();
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
continue;
netif_wake_subqueue(sdata->dev, queue);
}
rcu_read_unlock();
} else
tasklet_schedule(&local->tx_pending_tasklet);
}
void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
enum queue_stop_reason reason)
{
struct ieee80211_local *local = hw_to_local(hw);
unsigned long flags;
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
__ieee80211_wake_queue(hw, queue, reason);
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}
void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
{
ieee80211_wake_queue_by_reason(hw, queue,
IEEE80211_QUEUE_STOP_REASON_DRIVER);
}
EXPORT_SYMBOL(ieee80211_wake_queue);
static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
enum queue_stop_reason reason)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
trace_stop_queue(local, queue, reason);
if (WARN_ON(queue >= hw->queues))
return;
__set_bit(reason, &local->queue_stop_reasons[queue]);
rcu_read_lock();
list_for_each_entry_rcu(sdata, &local->interfaces, list)
netif_stop_subqueue(sdata->dev, queue);
rcu_read_unlock();
}
void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
enum queue_stop_reason reason)
{
struct ieee80211_local *local = hw_to_local(hw);
unsigned long flags;
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
__ieee80211_stop_queue(hw, queue, reason);
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}
void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
{
ieee80211_stop_queue_by_reason(hw, queue,
IEEE80211_QUEUE_STOP_REASON_DRIVER);
}
EXPORT_SYMBOL(ieee80211_stop_queue);
void ieee80211_add_pending_skb(struct ieee80211_local *local,
struct sk_buff *skb)
{
struct ieee80211_hw *hw = &local->hw;
unsigned long flags;
int queue = skb_get_queue_mapping(skb);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
if (WARN_ON(!info->control.vif)) {
kfree_skb(skb);
return;
}
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
__ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
__skb_queue_tail(&local->pending[queue], skb);
__ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}
int ieee80211_add_pending_skbs_fn(struct ieee80211_local *local,
struct sk_buff_head *skbs,
void (*fn)(void *data), void *data)
{
struct ieee80211_hw *hw = &local->hw;
struct sk_buff *skb;
unsigned long flags;
int queue, ret = 0, i;
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
for (i = 0; i < hw->queues; i++)
__ieee80211_stop_queue(hw, i,
IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
while ((skb = skb_dequeue(skbs))) {
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
if (WARN_ON(!info->control.vif)) {
kfree_skb(skb);
continue;
}
ret++;
queue = skb_get_queue_mapping(skb);
__skb_queue_tail(&local->pending[queue], skb);
}
if (fn)
fn(data);
for (i = 0; i < hw->queues; i++)
__ieee80211_wake_queue(hw, i,
IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
return ret;
}
int ieee80211_add_pending_skbs(struct ieee80211_local *local,
struct sk_buff_head *skbs)
{
return ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL);
}
void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
enum queue_stop_reason reason)
{
struct ieee80211_local *local = hw_to_local(hw);
unsigned long flags;
int i;
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
for (i = 0; i < hw->queues; i++)
__ieee80211_stop_queue(hw, i, reason);
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}
void ieee80211_stop_queues(struct ieee80211_hw *hw)
{
ieee80211_stop_queues_by_reason(hw,
IEEE80211_QUEUE_STOP_REASON_DRIVER);
}
EXPORT_SYMBOL(ieee80211_stop_queues);
int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
{
struct ieee80211_local *local = hw_to_local(hw);
unsigned long flags;
int ret;
if (WARN_ON(queue >= hw->queues))
return true;
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
ret = !!local->queue_stop_reasons[queue];
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
return ret;
}
EXPORT_SYMBOL(ieee80211_queue_stopped);
void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
enum queue_stop_reason reason)
{
struct ieee80211_local *local = hw_to_local(hw);
unsigned long flags;
int i;
spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
for (i = 0; i < hw->queues; i++)
__ieee80211_wake_queue(hw, i, reason);
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
}
void ieee80211_wake_queues(struct ieee80211_hw *hw)
{
ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
}
EXPORT_SYMBOL(ieee80211_wake_queues);
void ieee80211_iterate_active_interfaces(
struct ieee80211_hw *hw,
void (*iterator)(void *data, u8 *mac,
struct ieee80211_vif *vif),
void *data)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
mutex_lock(&local->iflist_mtx);
list_for_each_entry(sdata, &local->interfaces, list) {
switch (sdata->vif.type) {
case NL80211_IFTYPE_MONITOR:
case NL80211_IFTYPE_AP_VLAN:
continue;
default:
break;
}
if (ieee80211_sdata_running(sdata))
iterator(data, sdata->vif.addr,
&sdata->vif);
}
mutex_unlock(&local->iflist_mtx);
}
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
void ieee80211_iterate_active_interfaces_atomic(
struct ieee80211_hw *hw,
void (*iterator)(void *data, u8 *mac,
struct ieee80211_vif *vif),
void *data)
{
struct ieee80211_local *local = hw_to_local(hw);
struct ieee80211_sub_if_data *sdata;
rcu_read_lock();
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
switch (sdata->vif.type) {
case NL80211_IFTYPE_MONITOR:
case NL80211_IFTYPE_AP_VLAN:
continue;
default:
break;
}
if (ieee80211_sdata_running(sdata))
iterator(data, sdata->vif.addr,
&sdata->vif);
}
rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
/*
* Nothing should have been stuffed into the workqueue during
* the suspend->resume cycle. If this WARN is seen then there
* is a bug with either the driver suspend or something in
* mac80211 stuffing into the workqueue which we haven't yet
* cleared during mac80211's suspend cycle.
*/
static bool ieee80211_can_queue_work(struct ieee80211_local *local)
{
if (WARN(local->suspended && !local->resuming,
"queueing ieee80211 work while going to suspend\n"))
return false;
return true;
}
void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
{
struct ieee80211_local *local = hw_to_local(hw);
if (!ieee80211_can_queue_work(local))
return;
queue_work(local->workqueue, work);
}
EXPORT_SYMBOL(ieee80211_queue_work);
void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
struct delayed_work *dwork,
unsigned long delay)
{
struct ieee80211_local *local = hw_to_local(hw);
if (!ieee80211_can_queue_work(local))
return;
queue_delayed_work(local->workqueue, dwork, delay);
}
EXPORT_SYMBOL(ieee80211_queue_delayed_work);
void ieee802_11_parse_elems(u8 *start, size_t len,
struct ieee802_11_elems *elems)
{
ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
}
u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
struct ieee802_11_elems *elems,
u64 filter, u32 crc)
{
size_t left = len;
u8 *pos = start;
bool calc_crc = filter != 0;
memset(elems, 0, sizeof(*elems));
elems->ie_start = start;
elems->total_len = len;
while (left >= 2) {
u8 id, elen;
id = *pos++;
elen = *pos++;
left -= 2;
if (elen > left)
break;
if (calc_crc && id < 64 && (filter & (1ULL << id)))
crc = crc32_be(crc, pos - 2, elen + 2);
switch (id) {
case WLAN_EID_SSID:
elems->ssid = pos;
elems->ssid_len = elen;
break;
case WLAN_EID_SUPP_RATES:
elems->supp_rates = pos;
elems->supp_rates_len = elen;
break;
case WLAN_EID_FH_PARAMS:
elems->fh_params = pos;
elems->fh_params_len = elen;
break;
case WLAN_EID_DS_PARAMS:
elems->ds_params = pos;
elems->ds_params_len = elen;
break;
case WLAN_EID_CF_PARAMS:
elems->cf_params = pos;
elems->cf_params_len = elen;
break;
case WLAN_EID_TIM:
if (elen >= sizeof(struct ieee80211_tim_ie)) {
elems->tim = (void *)pos;
elems->tim_len = elen;
}
break;
case WLAN_EID_IBSS_PARAMS:
elems->ibss_params = pos;
elems->ibss_params_len = elen;
break;
case WLAN_EID_CHALLENGE:
elems->challenge = pos;
elems->challenge_len = elen;
break;
case WLAN_EID_VENDOR_SPECIFIC:
if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
pos[2] == 0xf2) {
/* Microsoft OUI (00:50:F2) */
if (calc_crc)
crc = crc32_be(crc, pos - 2, elen + 2);
if (pos[3] == 1) {
/* OUI Type 1 - WPA IE */
elems->wpa = pos;
elems->wpa_len = elen;
} else if (elen >= 5 && pos[3] == 2) {
/* OUI Type 2 - WMM IE */
if (pos[4] == 0) {
elems->wmm_info = pos;
elems->wmm_info_len = elen;
} else if (pos[4] == 1) {
elems->wmm_param = pos;
elems->wmm_param_len = elen;
}
}
}
break;
case WLAN_EID_RSN:
elems->rsn = pos;
elems->rsn_len = elen;
break;
case WLAN_EID_ERP_INFO:
elems->erp_info = pos;
elems->erp_info_len = elen;
break;
case WLAN_EID_EXT_SUPP_RATES:
elems->ext_supp_rates = pos;
elems->ext_supp_rates_len = elen;
break;
case WLAN_EID_HT_CAPABILITY:
if (elen >= sizeof(struct ieee80211_ht_cap))
elems->ht_cap_elem = (void *)pos;
break;
case WLAN_EID_HT_INFORMATION:
if (elen >= sizeof(struct ieee80211_ht_info))
elems->ht_info_elem = (void *)pos;
break;
case WLAN_EID_MESH_ID:
elems->mesh_id = pos;
elems->mesh_id_len = elen;
break;
case WLAN_EID_MESH_CONFIG:
if (elen >= sizeof(struct ieee80211_meshconf_ie))
elems->mesh_config = (void *)pos;
break;
case WLAN_EID_PEER_LINK:
elems->peer_link = pos;
elems->peer_link_len = elen;
break;
case WLAN_EID_PREQ:
elems->preq = pos;
elems->preq_len = elen;
break;
case WLAN_EID_PREP:
elems->prep = pos;
elems->prep_len = elen;
break;
case WLAN_EID_PERR:
elems->perr = pos;
elems->perr_len = elen;
break;
case WLAN_EID_RANN:
if (elen >= sizeof(struct ieee80211_rann_ie))
elems->rann = (void *)pos;
break;
case WLAN_EID_CHANNEL_SWITCH:
elems->ch_switch_elem = pos;
elems->ch_switch_elem_len = elen;
break;
case WLAN_EID_QUIET:
if (!elems->quiet_elem) {
elems->quiet_elem = pos;
elems->quiet_elem_len = elen;
}
elems->num_of_quiet_elem++;
break;
case WLAN_EID_COUNTRY:
elems->country_elem = pos;
elems->country_elem_len = elen;
break;
case WLAN_EID_PWR_CONSTRAINT:
elems->pwr_constr_elem = pos;
elems->pwr_constr_elem_len = elen;
break;
case WLAN_EID_TIMEOUT_INTERVAL:
elems->timeout_int = pos;
elems->timeout_int_len = elen;
break;
default:
break;
}
left -= elen;
pos += elen;
}
return crc;
}
void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_tx_queue_params qparam;
int queue;
bool use_11b;
int aCWmin, aCWmax;
if (!local->ops->conf_tx)
return;
memset(&qparam, 0, sizeof(qparam));
use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
!(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
for (queue = 0; queue < local_to_hw(local)->queues; queue++) {
/* Set defaults according to 802.11-2007 Table 7-37 */
aCWmax = 1023;
if (use_11b)
aCWmin = 31;
else
aCWmin = 15;
switch (queue) {
case 3: /* AC_BK */
qparam.cw_max = aCWmax;
qparam.cw_min = aCWmin;
qparam.txop = 0;
qparam.aifs = 7;
break;
default: /* never happens but let's not leave undefined */
case 2: /* AC_BE */
qparam.cw_max = aCWmax;
qparam.cw_min = aCWmin;
qparam.txop = 0;
qparam.aifs = 3;
break;
case 1: /* AC_VI */
qparam.cw_max = aCWmin;
qparam.cw_min = (aCWmin + 1) / 2 - 1;
if (use_11b)
qparam.txop = 6016/32;
else
qparam.txop = 3008/32;
qparam.aifs = 2;
break;
case 0: /* AC_VO */
qparam.cw_max = (aCWmin + 1) / 2 - 1;
qparam.cw_min = (aCWmin + 1) / 4 - 1;
if (use_11b)
qparam.txop = 3264/32;
else
qparam.txop = 1504/32;
qparam.aifs = 2;
break;
}
qparam.uapsd = false;
drv_conf_tx(local, queue, &qparam);
}
/* after reinitialize QoS TX queues setting to default,
* disable QoS at all */
if (sdata->vif.type != NL80211_IFTYPE_MONITOR) {
sdata->vif.bss_conf.qos =
sdata->vif.type != NL80211_IFTYPE_STATION;
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
}
}
void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
const size_t supp_rates_len,
const u8 *supp_rates)
{
struct ieee80211_local *local = sdata->local;
int i, have_higher_than_11mbit = 0;
/* cf. IEEE 802.11 9.2.12 */
for (i = 0; i < supp_rates_len; i++)
if ((supp_rates[i] & 0x7f) * 5 > 110)
have_higher_than_11mbit = 1;
if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
have_higher_than_11mbit)
sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
else
sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
ieee80211_set_wmm_default(sdata);
}
u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
enum ieee80211_band band)
{
struct ieee80211_supported_band *sband;
struct ieee80211_rate *bitrates;
u32 mandatory_rates;
enum ieee80211_rate_flags mandatory_flag;
int i;
sband = local->hw.wiphy->bands[band];
if (!sband) {
WARN_ON(1);
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
}
if (band == IEEE80211_BAND_2GHZ)
mandatory_flag = IEEE80211_RATE_MANDATORY_B;
else
mandatory_flag = IEEE80211_RATE_MANDATORY_A;
bitrates = sband->bitrates;
mandatory_rates = 0;
for (i = 0; i < sband->n_bitrates; i++)
if (bitrates[i].flags & mandatory_flag)
mandatory_rates |= BIT(i);
return mandatory_rates;
}
void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
u16 transaction, u16 auth_alg,
u8 *extra, size_t extra_len, const u8 *bssid,
const u8 *key, u8 key_len, u8 key_idx)
{
struct ieee80211_local *local = sdata->local;
struct sk_buff *skb;
struct ieee80211_mgmt *mgmt;
int err;
skb = dev_alloc_skb(local->hw.extra_tx_headroom +
sizeof(*mgmt) + 6 + extra_len);
if (!skb) {
printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
"frame\n", sdata->name);
return;
}
skb_reserve(skb, local->hw.extra_tx_headroom);
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
memset(mgmt, 0, 24 + 6);
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_AUTH);
memcpy(mgmt->da, bssid, ETH_ALEN);
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
memcpy(mgmt->bssid, bssid, ETH_ALEN);
mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
mgmt->u.auth.status_code = cpu_to_le16(0);
if (extra)
memcpy(skb_put(skb, extra_len), extra, extra_len);
if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
WARN_ON(err);
}
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
ieee80211_tx_skb(sdata, skb);
}
int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
const u8 *ie, size_t ie_len,
enum ieee80211_band band, u32 rate_mask,
u8 channel)
{
struct ieee80211_supported_band *sband;
u8 *pos;
size_t offset = 0, noffset;
int supp_rates_len, i;
u8 rates[32];
int num_rates;
int ext_rates_len;
sband = local->hw.wiphy->bands[band];
pos = buffer;
num_rates = 0;
for (i = 0; i < sband->n_bitrates; i++) {
if ((BIT(i) & rate_mask) == 0)
continue; /* skip rate */
rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
}
supp_rates_len = min_t(int, num_rates, 8);
*pos++ = WLAN_EID_SUPP_RATES;
*pos++ = supp_rates_len;
memcpy(pos, rates, supp_rates_len);
pos += supp_rates_len;
/* insert "request information" if in custom IEs */
if (ie && ie_len) {
static const u8 before_extrates[] = {
WLAN_EID_SSID,
WLAN_EID_SUPP_RATES,
WLAN_EID_REQUEST,
};
noffset = ieee80211_ie_split(ie, ie_len,
before_extrates,
ARRAY_SIZE(before_extrates),
offset);
memcpy(pos, ie + offset, noffset - offset);
pos += noffset - offset;
offset = noffset;
}
ext_rates_len = num_rates - supp_rates_len;
if (ext_rates_len > 0) {
*pos++ = WLAN_EID_EXT_SUPP_RATES;
*pos++ = ext_rates_len;
memcpy(pos, rates + supp_rates_len, ext_rates_len);
pos += ext_rates_len;
}
if (channel && sband->band == IEEE80211_BAND_2GHZ) {
*pos++ = WLAN_EID_DS_PARAMS;
*pos++ = 1;
*pos++ = channel;
}
/* insert custom IEs that go before HT */
if (ie && ie_len) {
static const u8 before_ht[] = {
WLAN_EID_SSID,
WLAN_EID_SUPP_RATES,
WLAN_EID_REQUEST,
WLAN_EID_EXT_SUPP_RATES,
WLAN_EID_DS_PARAMS,
WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
};
noffset = ieee80211_ie_split(ie, ie_len,
before_ht, ARRAY_SIZE(before_ht),
offset);
memcpy(pos, ie + offset, noffset - offset);
pos += noffset - offset;
offset = noffset;
}
if (sband->ht_cap.ht_supported) {
u16 cap = sband->ht_cap.cap;
__le16 tmp;
if (ieee80211_disable_40mhz_24ghz &&
sband->band == IEEE80211_BAND_2GHZ) {
cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
cap &= ~IEEE80211_HT_CAP_SGI_40;
}
*pos++ = WLAN_EID_HT_CAPABILITY;
*pos++ = sizeof(struct ieee80211_ht_cap);
memset(pos, 0, sizeof(struct ieee80211_ht_cap));
tmp = cpu_to_le16(cap);
memcpy(pos, &tmp, sizeof(u16));
pos += sizeof(u16);