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linux/net/mac80211/ieee80211_ioctl.c
Zhu Yi ece8edddf0 mac80211: hardware scan rework 
The scan code in mac80211 makes the software scan assumption in various
places. For example, we stop the Tx queue during a software scan so that
all the Tx packets will be queued by the stack. We also drop frames not
related to scan in the software scan process. But these are not true for
hardware scan.

Some wireless hardwares (for example iwl3945/4965) has the ability to
perform the whole scan process by hardware and/or firmware. The hardware
scan is relative powerful in that it tries to maintain normal network
traffic while doing a scan in the background. Some drivers (i.e iwlwifi)
do provide a way to tune the hardware scan parameters (for example if the
STA is associated, what's the max time could the STA leave from the
associated channel, how long the scans get suspended after returning to
the service channel, etc). But basically this is transparent to the
stack. mac80211 should not stop Tx queues or drop Rx packets during a
hardware scan.

This patch resolves the above problem by spliting the current scan
indicator local->sta_scanning into local->sta_sw_scanning and
local->sta_hw_scanning. It then changes the scan related code to be aware
of hardware scan or software scan in various places. With this patch,
iwlwifi performs much better in the scan-while-associated condition and
disable_hw_scan=1 should never be required.

Cc: Mohamed Abbas <mohamed.abbas@intel.com>
Cc: Ben Cahill <ben.m.cahill@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:55:27 -08:00

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/*
* Copyright 2002-2005, Instant802 Networks, Inc.
* Copyright 2005-2006, Devicescape Software, Inc.
*
* 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.
*/
#include <linux/module.h>
#include <linux/init.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/wireless.h>
#include <net/iw_handler.h>
#include <asm/uaccess.h>
#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "ieee80211_rate.h"
#include "wpa.h"
#include "aes_ccm.h"
static int ieee80211_set_encryption(struct net_device *dev, u8 *sta_addr,
int idx, int alg, int remove,
int set_tx_key, const u8 *_key,
size_t key_len)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
int ret = 0;
struct sta_info *sta;
struct ieee80211_key *key;
struct ieee80211_sub_if_data *sdata;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (idx < 0 || idx >= NUM_DEFAULT_KEYS) {
printk(KERN_DEBUG "%s: set_encrypt - invalid idx=%d\n",
dev->name, idx);
return -EINVAL;
}
if (is_broadcast_ether_addr(sta_addr)) {
sta = NULL;
key = sdata->keys[idx];
} else {
set_tx_key = 0;
/*
* According to the standard, the key index of a pairwise
* key must be zero. However, some AP are broken when it
* comes to WEP key indices, so we work around this.
*/
if (idx != 0 && alg != ALG_WEP) {
printk(KERN_DEBUG "%s: set_encrypt - non-zero idx for "
"individual key\n", dev->name);
return -EINVAL;
}
sta = sta_info_get(local, sta_addr);
if (!sta) {
#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
DECLARE_MAC_BUF(mac);
printk(KERN_DEBUG "%s: set_encrypt - unknown addr "
"%s\n",
dev->name, print_mac(mac, sta_addr));
#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
return -ENOENT;
}
key = sta->key;
}
if (remove) {
ieee80211_key_free(key);
key = NULL;
} else {
/*
* Automatically frees any old key if present.
*/
key = ieee80211_key_alloc(sdata, sta, alg, idx, key_len, _key);
if (!key) {
ret = -ENOMEM;
goto err_out;
}
}
if (set_tx_key || (!sta && !sdata->default_key && key))
ieee80211_set_default_key(sdata, idx);
ret = 0;
err_out:
if (sta)
sta_info_put(sta);
return ret;
}
static int ieee80211_ioctl_siwgenie(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *data, char *extra)
{
struct ieee80211_sub_if_data *sdata;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (sdata->flags & IEEE80211_SDATA_USERSPACE_MLME)
return -EOPNOTSUPP;
if (sdata->type == IEEE80211_IF_TYPE_STA ||
sdata->type == IEEE80211_IF_TYPE_IBSS) {
int ret = ieee80211_sta_set_extra_ie(dev, extra, data->length);
if (ret)
return ret;
sdata->u.sta.flags &= ~IEEE80211_STA_AUTO_BSSID_SEL;
ieee80211_sta_req_auth(dev, &sdata->u.sta);
return 0;
}
return -EOPNOTSUPP;
}
static int ieee80211_ioctl_giwname(struct net_device *dev,
struct iw_request_info *info,
char *name, char *extra)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
switch (local->hw.conf.phymode) {
case MODE_IEEE80211A:
strcpy(name, "IEEE 802.11a");
break;
case MODE_IEEE80211B:
strcpy(name, "IEEE 802.11b");
break;
case MODE_IEEE80211G:
strcpy(name, "IEEE 802.11g");
break;
default:
strcpy(name, "IEEE 802.11");
break;
}
return 0;
}
static int ieee80211_ioctl_giwrange(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *data, char *extra)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct iw_range *range = (struct iw_range *) extra;
struct ieee80211_hw_mode *mode = NULL;
int c = 0;
data->length = sizeof(struct iw_range);
memset(range, 0, sizeof(struct iw_range));
range->we_version_compiled = WIRELESS_EXT;
range->we_version_source = 21;
range->retry_capa = IW_RETRY_LIMIT;
range->retry_flags = IW_RETRY_LIMIT;
range->min_retry = 0;
range->max_retry = 255;
range->min_rts = 0;
range->max_rts = 2347;
range->min_frag = 256;
range->max_frag = 2346;
range->encoding_size[0] = 5;
range->encoding_size[1] = 13;
range->num_encoding_sizes = 2;
range->max_encoding_tokens = NUM_DEFAULT_KEYS;
range->max_qual.qual = local->hw.max_signal;
range->max_qual.level = local->hw.max_rssi;
range->max_qual.noise = local->hw.max_noise;
range->max_qual.updated = local->wstats_flags;
range->avg_qual.qual = local->hw.max_signal/2;
range->avg_qual.level = 0;
range->avg_qual.noise = 0;
range->avg_qual.updated = local->wstats_flags;
range->enc_capa = IW_ENC_CAPA_WPA | IW_ENC_CAPA_WPA2 |
IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;
list_for_each_entry(mode, &local->modes_list, list) {
int i = 0;
if (!(local->enabled_modes & (1 << mode->mode)) ||
(local->hw_modes & local->enabled_modes &
(1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
continue;
while (i < mode->num_channels && c < IW_MAX_FREQUENCIES) {
struct ieee80211_channel *chan = &mode->channels[i];
if (chan->flag & IEEE80211_CHAN_W_SCAN) {
range->freq[c].i = chan->chan;
range->freq[c].m = chan->freq * 100000;
range->freq[c].e = 1;
c++;
}
i++;
}
}
range->num_channels = c;
range->num_frequency = c;
IW_EVENT_CAPA_SET_KERNEL(range->event_capa);
IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWTHRSPY);
IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWAP);
IW_EVENT_CAPA_SET(range->event_capa, SIOCGIWSCAN);
return 0;
}
static int ieee80211_ioctl_siwmode(struct net_device *dev,
struct iw_request_info *info,
__u32 *mode, char *extra)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
int type;
if (sdata->type == IEEE80211_IF_TYPE_VLAN)
return -EOPNOTSUPP;
switch (*mode) {
case IW_MODE_INFRA:
type = IEEE80211_IF_TYPE_STA;
break;
case IW_MODE_ADHOC:
type = IEEE80211_IF_TYPE_IBSS;
break;
case IW_MODE_MONITOR:
type = IEEE80211_IF_TYPE_MNTR;
break;
default:
return -EINVAL;
}
if (type == sdata->type)
return 0;
if (netif_running(dev))
return -EBUSY;
ieee80211_if_reinit(dev);
ieee80211_if_set_type(dev, type);
return 0;
}
static int ieee80211_ioctl_giwmode(struct net_device *dev,
struct iw_request_info *info,
__u32 *mode, char *extra)
{
struct ieee80211_sub_if_data *sdata;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
switch (sdata->type) {
case IEEE80211_IF_TYPE_AP:
*mode = IW_MODE_MASTER;
break;
case IEEE80211_IF_TYPE_STA:
*mode = IW_MODE_INFRA;
break;
case IEEE80211_IF_TYPE_IBSS:
*mode = IW_MODE_ADHOC;
break;
case IEEE80211_IF_TYPE_MNTR:
*mode = IW_MODE_MONITOR;
break;
case IEEE80211_IF_TYPE_WDS:
*mode = IW_MODE_REPEAT;
break;
case IEEE80211_IF_TYPE_VLAN:
*mode = IW_MODE_SECOND; /* FIXME */
break;
default:
*mode = IW_MODE_AUTO;
break;
}
return 0;
}
int ieee80211_set_channel(struct ieee80211_local *local, int channel, int freq)
{
struct ieee80211_hw_mode *mode;
int c, set = 0;
int ret = -EINVAL;
list_for_each_entry(mode, &local->modes_list, list) {
if (!(local->enabled_modes & (1 << mode->mode)))
continue;
for (c = 0; c < mode->num_channels; c++) {
struct ieee80211_channel *chan = &mode->channels[c];
if (chan->flag & IEEE80211_CHAN_W_SCAN &&
((chan->chan == channel) || (chan->freq == freq))) {
local->oper_channel = chan;
local->oper_hw_mode = mode;
set = 1;
break;
}
}
if (set)
break;
}
if (set) {
if (local->sta_sw_scanning)
ret = 0;
else
ret = ieee80211_hw_config(local);
rate_control_clear(local);
}
return ret;
}
static int ieee80211_ioctl_siwfreq(struct net_device *dev,
struct iw_request_info *info,
struct iw_freq *freq, char *extra)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (sdata->type == IEEE80211_IF_TYPE_STA)
sdata->u.sta.flags &= ~IEEE80211_STA_AUTO_CHANNEL_SEL;
/* freq->e == 0: freq->m = channel; otherwise freq = m * 10^e */
if (freq->e == 0) {
if (freq->m < 0) {
if (sdata->type == IEEE80211_IF_TYPE_STA)
sdata->u.sta.flags |=
IEEE80211_STA_AUTO_CHANNEL_SEL;
return 0;
} else
return ieee80211_set_channel(local, freq->m, -1);
} else {
int i, div = 1000000;
for (i = 0; i < freq->e; i++)
div /= 10;
if (div > 0)
return ieee80211_set_channel(local, -1, freq->m / div);
else
return -EINVAL;
}
}
static int ieee80211_ioctl_giwfreq(struct net_device *dev,
struct iw_request_info *info,
struct iw_freq *freq, char *extra)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
/* TODO: in station mode (Managed/Ad-hoc) might need to poll low-level
* driver for the current channel with firmware-based management */
freq->m = local->hw.conf.freq;
freq->e = 6;
return 0;
}
static int ieee80211_ioctl_siwessid(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *data, char *ssid)
{
struct ieee80211_sub_if_data *sdata;
size_t len = data->length;
/* iwconfig uses nul termination in SSID.. */
if (len > 0 && ssid[len - 1] == '\0')
len--;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (sdata->type == IEEE80211_IF_TYPE_STA ||
sdata->type == IEEE80211_IF_TYPE_IBSS) {
int ret;
if (sdata->flags & IEEE80211_SDATA_USERSPACE_MLME) {
if (len > IEEE80211_MAX_SSID_LEN)
return -EINVAL;
memcpy(sdata->u.sta.ssid, ssid, len);
sdata->u.sta.ssid_len = len;
return 0;
}
if (data->flags)
sdata->u.sta.flags &= ~IEEE80211_STA_AUTO_SSID_SEL;
else
sdata->u.sta.flags |= IEEE80211_STA_AUTO_SSID_SEL;
ret = ieee80211_sta_set_ssid(dev, ssid, len);
if (ret)
return ret;
ieee80211_sta_req_auth(dev, &sdata->u.sta);
return 0;
}
if (sdata->type == IEEE80211_IF_TYPE_AP) {
memcpy(sdata->u.ap.ssid, ssid, len);
memset(sdata->u.ap.ssid + len, 0,
IEEE80211_MAX_SSID_LEN - len);
sdata->u.ap.ssid_len = len;
return ieee80211_if_config(dev);
}
return -EOPNOTSUPP;
}
static int ieee80211_ioctl_giwessid(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *data, char *ssid)
{
size_t len;
struct ieee80211_sub_if_data *sdata;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (sdata->type == IEEE80211_IF_TYPE_STA ||
sdata->type == IEEE80211_IF_TYPE_IBSS) {
int res = ieee80211_sta_get_ssid(dev, ssid, &len);
if (res == 0) {
data->length = len;
data->flags = 1;
} else
data->flags = 0;
return res;
}
if (sdata->type == IEEE80211_IF_TYPE_AP) {
len = sdata->u.ap.ssid_len;
if (len > IW_ESSID_MAX_SIZE)
len = IW_ESSID_MAX_SIZE;
memcpy(ssid, sdata->u.ap.ssid, len);
data->length = len;
data->flags = 1;
return 0;
}
return -EOPNOTSUPP;
}
static int ieee80211_ioctl_siwap(struct net_device *dev,
struct iw_request_info *info,
struct sockaddr *ap_addr, char *extra)
{
struct ieee80211_sub_if_data *sdata;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (sdata->type == IEEE80211_IF_TYPE_STA ||
sdata->type == IEEE80211_IF_TYPE_IBSS) {
int ret;
if (sdata->flags & IEEE80211_SDATA_USERSPACE_MLME) {
memcpy(sdata->u.sta.bssid, (u8 *) &ap_addr->sa_data,
ETH_ALEN);
return 0;
}
if (is_zero_ether_addr((u8 *) &ap_addr->sa_data))
sdata->u.sta.flags |= IEEE80211_STA_AUTO_BSSID_SEL |
IEEE80211_STA_AUTO_CHANNEL_SEL;
else if (is_broadcast_ether_addr((u8 *) &ap_addr->sa_data))
sdata->u.sta.flags |= IEEE80211_STA_AUTO_BSSID_SEL;
else
sdata->u.sta.flags &= ~IEEE80211_STA_AUTO_BSSID_SEL;
ret = ieee80211_sta_set_bssid(dev, (u8 *) &ap_addr->sa_data);
if (ret)
return ret;
ieee80211_sta_req_auth(dev, &sdata->u.sta);
return 0;
} else if (sdata->type == IEEE80211_IF_TYPE_WDS) {
if (memcmp(sdata->u.wds.remote_addr, (u8 *) &ap_addr->sa_data,
ETH_ALEN) == 0)
return 0;
return ieee80211_if_update_wds(dev, (u8 *) &ap_addr->sa_data);
}
return -EOPNOTSUPP;
}
static int ieee80211_ioctl_giwap(struct net_device *dev,
struct iw_request_info *info,
struct sockaddr *ap_addr, char *extra)
{
struct ieee80211_sub_if_data *sdata;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (sdata->type == IEEE80211_IF_TYPE_STA ||
sdata->type == IEEE80211_IF_TYPE_IBSS) {
ap_addr->sa_family = ARPHRD_ETHER;
memcpy(&ap_addr->sa_data, sdata->u.sta.bssid, ETH_ALEN);
return 0;
} else if (sdata->type == IEEE80211_IF_TYPE_WDS) {
ap_addr->sa_family = ARPHRD_ETHER;
memcpy(&ap_addr->sa_data, sdata->u.wds.remote_addr, ETH_ALEN);
return 0;
}
return -EOPNOTSUPP;
}
static int ieee80211_ioctl_siwscan(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct iw_scan_req *req = NULL;
u8 *ssid = NULL;
size_t ssid_len = 0;
if (!netif_running(dev))
return -ENETDOWN;
if (sdata->type != IEEE80211_IF_TYPE_STA &&
sdata->type != IEEE80211_IF_TYPE_IBSS &&
sdata->type != IEEE80211_IF_TYPE_AP) {
return -EOPNOTSUPP;
}
/* if SSID was specified explicitly then use that */
if (wrqu->data.length == sizeof(struct iw_scan_req) &&
wrqu->data.flags & IW_SCAN_THIS_ESSID) {
req = (struct iw_scan_req *)extra;
ssid = req->essid;
ssid_len = req->essid_len;
}
return ieee80211_sta_req_scan(dev, ssid, ssid_len);
}
static int ieee80211_ioctl_giwscan(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *data, char *extra)
{
int res;
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
if (local->sta_sw_scanning || local->sta_hw_scanning)
return -EAGAIN;
res = ieee80211_sta_scan_results(dev, extra, data->length);
if (res >= 0) {
data->length = res;
return 0;
}
data->length = 0;
return res;
}
static int ieee80211_ioctl_siwrate(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *rate, char *extra)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_hw_mode *mode;
int i;
u32 target_rate = rate->value / 100000;
struct ieee80211_sub_if_data *sdata;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (!sdata->bss)
return -ENODEV;
mode = local->oper_hw_mode;
/* target_rate = -1, rate->fixed = 0 means auto only, so use all rates
* target_rate = X, rate->fixed = 1 means only rate X
* target_rate = X, rate->fixed = 0 means all rates <= X */
sdata->bss->max_ratectrl_rateidx = -1;
sdata->bss->force_unicast_rateidx = -1;
if (rate->value < 0)
return 0;
for (i=0; i < mode->num_rates; i++) {
struct ieee80211_rate *rates = &mode->rates[i];
int this_rate = rates->rate;
if (target_rate == this_rate) {
sdata->bss->max_ratectrl_rateidx = i;
if (rate->fixed)
sdata->bss->force_unicast_rateidx = i;
return 0;
}
}
return -EINVAL;
}
static int ieee80211_ioctl_giwrate(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *rate, char *extra)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct sta_info *sta;
struct ieee80211_sub_if_data *sdata;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (sdata->type == IEEE80211_IF_TYPE_STA)
sta = sta_info_get(local, sdata->u.sta.bssid);
else
return -EOPNOTSUPP;
if (!sta)
return -ENODEV;
if (sta->txrate < local->oper_hw_mode->num_rates)
rate->value = local->oper_hw_mode->rates[sta->txrate].rate * 100000;
else
rate->value = 0;
sta_info_put(sta);
return 0;
}
static int ieee80211_ioctl_siwtxpower(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *data, char *extra)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
bool need_reconfig = 0;
u8 new_power_level;
if ((data->txpower.flags & IW_TXPOW_TYPE) != IW_TXPOW_DBM)
return -EINVAL;
if (data->txpower.flags & IW_TXPOW_RANGE)
return -EINVAL;
if (data->txpower.fixed) {
new_power_level = data->txpower.value;
} else {
/* Automatic power level. Get the px power from the current
* channel. */
struct ieee80211_channel* chan = local->oper_channel;
if (!chan)
return -EINVAL;
new_power_level = chan->power_level;
}
if (local->hw.conf.power_level != new_power_level) {
local->hw.conf.power_level = new_power_level;
need_reconfig = 1;
}
if (local->hw.conf.radio_enabled != !(data->txpower.disabled)) {
local->hw.conf.radio_enabled = !(data->txpower.disabled);
need_reconfig = 1;
}
if (need_reconfig) {
ieee80211_hw_config(local);
/* The return value of hw_config is not of big interest here,
* as it doesn't say that it failed because of _this_ config
* change or something else. Ignore it. */
}
return 0;
}
static int ieee80211_ioctl_giwtxpower(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *data, char *extra)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
data->txpower.fixed = 1;
data->txpower.disabled = !(local->hw.conf.radio_enabled);
data->txpower.value = local->hw.conf.power_level;
data->txpower.flags = IW_TXPOW_DBM;
return 0;
}
static int ieee80211_ioctl_siwrts(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *rts, char *extra)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
if (rts->disabled)
local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
else if (rts->value < 0 || rts->value > IEEE80211_MAX_RTS_THRESHOLD)
return -EINVAL;
else
local->rts_threshold = rts->value;
/* If the wlan card performs RTS/CTS in hardware/firmware,
* configure it here */
if (local->ops->set_rts_threshold)
local->ops->set_rts_threshold(local_to_hw(local),
local->rts_threshold);
return 0;
}
static int ieee80211_ioctl_giwrts(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *rts, char *extra)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
rts->value = local->rts_threshold;
rts->disabled = (rts->value >= IEEE80211_MAX_RTS_THRESHOLD);
rts->fixed = 1;
return 0;
}
static int ieee80211_ioctl_siwfrag(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *frag, char *extra)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
if (frag->disabled)
local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
else if (frag->value < 256 ||
frag->value > IEEE80211_MAX_FRAG_THRESHOLD)
return -EINVAL;
else {
/* Fragment length must be even, so strip LSB. */
local->fragmentation_threshold = frag->value & ~0x1;
}
/* If the wlan card performs fragmentation in hardware/firmware,
* configure it here */
if (local->ops->set_frag_threshold)
local->ops->set_frag_threshold(
local_to_hw(local),
local->fragmentation_threshold);
return 0;
}
static int ieee80211_ioctl_giwfrag(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *frag, char *extra)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
frag->value = local->fragmentation_threshold;
frag->disabled = (frag->value >= IEEE80211_MAX_RTS_THRESHOLD);
frag->fixed = 1;
return 0;
}
static int ieee80211_ioctl_siwretry(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *retry, char *extra)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
if (retry->disabled ||
(retry->flags & IW_RETRY_TYPE) != IW_RETRY_LIMIT)
return -EINVAL;
if (retry->flags & IW_RETRY_MAX)
local->long_retry_limit = retry->value;
else if (retry->flags & IW_RETRY_MIN)
local->short_retry_limit = retry->value;
else {
local->long_retry_limit = retry->value;
local->short_retry_limit = retry->value;
}
if (local->ops->set_retry_limit) {
return local->ops->set_retry_limit(
local_to_hw(local),
local->short_retry_limit,
local->long_retry_limit);
}
return 0;
}
static int ieee80211_ioctl_giwretry(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *retry, char *extra)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
retry->disabled = 0;
if (retry->flags == 0 || retry->flags & IW_RETRY_MIN) {
/* first return min value, iwconfig will ask max value
* later if needed */
retry->flags |= IW_RETRY_LIMIT;
retry->value = local->short_retry_limit;
if (local->long_retry_limit != local->short_retry_limit)
retry->flags |= IW_RETRY_MIN;
return 0;
}
if (retry->flags & IW_RETRY_MAX) {
retry->flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
retry->value = local->long_retry_limit;
}
return 0;
}
static int ieee80211_ioctl_siwmlme(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *data, char *extra)
{
struct ieee80211_sub_if_data *sdata;
struct iw_mlme *mlme = (struct iw_mlme *) extra;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (sdata->type != IEEE80211_IF_TYPE_STA &&
sdata->type != IEEE80211_IF_TYPE_IBSS)
return -EINVAL;
switch (mlme->cmd) {
case IW_MLME_DEAUTH:
/* TODO: mlme->addr.sa_data */
return ieee80211_sta_deauthenticate(dev, mlme->reason_code);
case IW_MLME_DISASSOC:
/* TODO: mlme->addr.sa_data */
return ieee80211_sta_disassociate(dev, mlme->reason_code);
default:
return -EOPNOTSUPP;
}
}
static int ieee80211_ioctl_siwencode(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *erq, char *keybuf)
{
struct ieee80211_sub_if_data *sdata;
int idx, i, alg = ALG_WEP;
u8 bcaddr[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
int remove = 0;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
idx = erq->flags & IW_ENCODE_INDEX;
if (idx == 0) {
if (sdata->default_key)
for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
if (sdata->default_key == sdata->keys[i]) {
idx = i;
break;
}
}
} else if (idx < 1 || idx > 4)
return -EINVAL;
else
idx--;
if (erq->flags & IW_ENCODE_DISABLED)
remove = 1;
else if (erq->length == 0) {
/* No key data - just set the default TX key index */
ieee80211_set_default_key(sdata, idx);
return 0;
}
return ieee80211_set_encryption(
dev, bcaddr,
idx, alg, remove,
!sdata->default_key,
keybuf, erq->length);
}
static int ieee80211_ioctl_giwencode(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *erq, char *key)
{
struct ieee80211_sub_if_data *sdata;
int idx, i;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
idx = erq->flags & IW_ENCODE_INDEX;
if (idx < 1 || idx > 4) {
idx = -1;
if (!sdata->default_key)
idx = 0;
else for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
if (sdata->default_key == sdata->keys[i]) {
idx = i;
break;
}
}
if (idx < 0)
return -EINVAL;
} else
idx--;
erq->flags = idx + 1;
if (!sdata->keys[idx]) {
erq->length = 0;
erq->flags |= IW_ENCODE_DISABLED;
return 0;
}
memcpy(key, sdata->keys[idx]->conf.key,
min_t(int, erq->length, sdata->keys[idx]->conf.keylen));
erq->length = sdata->keys[idx]->conf.keylen;
erq->flags |= IW_ENCODE_ENABLED;
return 0;
}
static int ieee80211_ioctl_siwauth(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *data, char *extra)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
int ret = 0;
switch (data->flags & IW_AUTH_INDEX) {
case IW_AUTH_WPA_VERSION:
case IW_AUTH_CIPHER_PAIRWISE:
case IW_AUTH_CIPHER_GROUP:
case IW_AUTH_WPA_ENABLED:
case IW_AUTH_RX_UNENCRYPTED_EAPOL:
case IW_AUTH_KEY_MGMT:
break;
case IW_AUTH_PRIVACY_INVOKED:
if (sdata->type != IEEE80211_IF_TYPE_STA)
ret = -EINVAL;
else {
sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
/*
* Privacy invoked by wpa_supplicant, store the
* value and allow associating to a protected
* network without having a key up front.
*/
if (data->value)
sdata->u.sta.flags |=
IEEE80211_STA_PRIVACY_INVOKED;
}
break;
case IW_AUTH_80211_AUTH_ALG:
if (sdata->type == IEEE80211_IF_TYPE_STA ||
sdata->type == IEEE80211_IF_TYPE_IBSS)
sdata->u.sta.auth_algs = data->value;
else
ret = -EOPNOTSUPP;
break;
default:
ret = -EOPNOTSUPP;
break;
}
return ret;
}
/* Get wireless statistics. Called by /proc/net/wireless and by SIOCGIWSTATS */
static struct iw_statistics *ieee80211_get_wireless_stats(struct net_device *dev)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct iw_statistics *wstats = &local->wstats;
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct sta_info *sta = NULL;
if (sdata->type == IEEE80211_IF_TYPE_STA ||
sdata->type == IEEE80211_IF_TYPE_IBSS)
sta = sta_info_get(local, sdata->u.sta.bssid);
if (!sta) {
wstats->discard.fragment = 0;
wstats->discard.misc = 0;
wstats->qual.qual = 0;
wstats->qual.level = 0;
wstats->qual.noise = 0;
wstats->qual.updated = IW_QUAL_ALL_INVALID;
} else {
wstats->qual.level = sta->last_rssi;
wstats->qual.qual = sta->last_signal;
wstats->qual.noise = sta->last_noise;
wstats->qual.updated = local->wstats_flags;
sta_info_put(sta);
}
return wstats;
}
static int ieee80211_ioctl_giwauth(struct net_device *dev,
struct iw_request_info *info,
struct iw_param *data, char *extra)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
int ret = 0;
switch (data->flags & IW_AUTH_INDEX) {
case IW_AUTH_80211_AUTH_ALG:
if (sdata->type == IEEE80211_IF_TYPE_STA ||
sdata->type == IEEE80211_IF_TYPE_IBSS)
data->value = sdata->u.sta.auth_algs;
else
ret = -EOPNOTSUPP;
break;
default:
ret = -EOPNOTSUPP;
break;
}
return ret;
}
static int ieee80211_ioctl_siwencodeext(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *erq, char *extra)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct iw_encode_ext *ext = (struct iw_encode_ext *) extra;
int uninitialized_var(alg), idx, i, remove = 0;
switch (ext->alg) {
case IW_ENCODE_ALG_NONE:
remove = 1;
break;
case IW_ENCODE_ALG_WEP:
alg = ALG_WEP;
break;
case IW_ENCODE_ALG_TKIP:
alg = ALG_TKIP;
break;
case IW_ENCODE_ALG_CCMP:
alg = ALG_CCMP;
break;
default:
return -EOPNOTSUPP;
}
if (erq->flags & IW_ENCODE_DISABLED)
remove = 1;
idx = erq->flags & IW_ENCODE_INDEX;
if (idx < 1 || idx > 4) {
idx = -1;
if (!sdata->default_key)
idx = 0;
else for (i = 0; i < NUM_DEFAULT_KEYS; i++) {
if (sdata->default_key == sdata->keys[i]) {
idx = i;
break;
}
}
if (idx < 0)
return -EINVAL;
} else
idx--;
return ieee80211_set_encryption(dev, ext->addr.sa_data, idx, alg,
remove,
ext->ext_flags &
IW_ENCODE_EXT_SET_TX_KEY,
ext->key, ext->key_len);
}
/* Structures to export the Wireless Handlers */
static const iw_handler ieee80211_handler[] =
{
(iw_handler) NULL, /* SIOCSIWCOMMIT */
(iw_handler) ieee80211_ioctl_giwname, /* SIOCGIWNAME */
(iw_handler) NULL, /* SIOCSIWNWID */
(iw_handler) NULL, /* SIOCGIWNWID */
(iw_handler) ieee80211_ioctl_siwfreq, /* SIOCSIWFREQ */
(iw_handler) ieee80211_ioctl_giwfreq, /* SIOCGIWFREQ */
(iw_handler) ieee80211_ioctl_siwmode, /* SIOCSIWMODE */
(iw_handler) ieee80211_ioctl_giwmode, /* SIOCGIWMODE */
(iw_handler) NULL, /* SIOCSIWSENS */
(iw_handler) NULL, /* SIOCGIWSENS */
(iw_handler) NULL /* not used */, /* SIOCSIWRANGE */
(iw_handler) ieee80211_ioctl_giwrange, /* SIOCGIWRANGE */
(iw_handler) NULL /* not used */, /* SIOCSIWPRIV */
(iw_handler) NULL /* kernel code */, /* SIOCGIWPRIV */
(iw_handler) NULL /* not used */, /* SIOCSIWSTATS */
(iw_handler) NULL /* kernel code */, /* SIOCGIWSTATS */
(iw_handler) NULL, /* SIOCSIWSPY */
(iw_handler) NULL, /* SIOCGIWSPY */
(iw_handler) NULL, /* SIOCSIWTHRSPY */
(iw_handler) NULL, /* SIOCGIWTHRSPY */
(iw_handler) ieee80211_ioctl_siwap, /* SIOCSIWAP */
(iw_handler) ieee80211_ioctl_giwap, /* SIOCGIWAP */
(iw_handler) ieee80211_ioctl_siwmlme, /* SIOCSIWMLME */
(iw_handler) NULL, /* SIOCGIWAPLIST */
(iw_handler) ieee80211_ioctl_siwscan, /* SIOCSIWSCAN */
(iw_handler) ieee80211_ioctl_giwscan, /* SIOCGIWSCAN */
(iw_handler) ieee80211_ioctl_siwessid, /* SIOCSIWESSID */
(iw_handler) ieee80211_ioctl_giwessid, /* SIOCGIWESSID */
(iw_handler) NULL, /* SIOCSIWNICKN */
(iw_handler) NULL, /* SIOCGIWNICKN */
(iw_handler) NULL, /* -- hole -- */
(iw_handler) NULL, /* -- hole -- */
(iw_handler) ieee80211_ioctl_siwrate, /* SIOCSIWRATE */
(iw_handler) ieee80211_ioctl_giwrate, /* SIOCGIWRATE */
(iw_handler) ieee80211_ioctl_siwrts, /* SIOCSIWRTS */
(iw_handler) ieee80211_ioctl_giwrts, /* SIOCGIWRTS */
(iw_handler) ieee80211_ioctl_siwfrag, /* SIOCSIWFRAG */
(iw_handler) ieee80211_ioctl_giwfrag, /* SIOCGIWFRAG */
(iw_handler) ieee80211_ioctl_siwtxpower, /* SIOCSIWTXPOW */
(iw_handler) ieee80211_ioctl_giwtxpower, /* SIOCGIWTXPOW */
(iw_handler) ieee80211_ioctl_siwretry, /* SIOCSIWRETRY */
(iw_handler) ieee80211_ioctl_giwretry, /* SIOCGIWRETRY */
(iw_handler) ieee80211_ioctl_siwencode, /* SIOCSIWENCODE */
(iw_handler) ieee80211_ioctl_giwencode, /* SIOCGIWENCODE */
(iw_handler) NULL, /* SIOCSIWPOWER */
(iw_handler) NULL, /* SIOCGIWPOWER */
(iw_handler) NULL, /* -- hole -- */
(iw_handler) NULL, /* -- hole -- */
(iw_handler) ieee80211_ioctl_siwgenie, /* SIOCSIWGENIE */
(iw_handler) NULL, /* SIOCGIWGENIE */
(iw_handler) ieee80211_ioctl_siwauth, /* SIOCSIWAUTH */
(iw_handler) ieee80211_ioctl_giwauth, /* SIOCGIWAUTH */
(iw_handler) ieee80211_ioctl_siwencodeext, /* SIOCSIWENCODEEXT */
(iw_handler) NULL, /* SIOCGIWENCODEEXT */
(iw_handler) NULL, /* SIOCSIWPMKSA */
(iw_handler) NULL, /* -- hole -- */
};
const struct iw_handler_def ieee80211_iw_handler_def =
{
.num_standard = ARRAY_SIZE(ieee80211_handler),
.standard = (iw_handler *) ieee80211_handler,
.get_wireless_stats = ieee80211_get_wireless_stats,
};
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