linux/net/mac80211/cfg.c
Johannes Berg 667503ddcb cfg80211: fix locking
Over time, a lot of locking issues have crept into
the smarts of cfg80211, so e.g. scan completion can
race against a new scan, IBSS join can race against
leaving an IBSS, etc.

Introduce a new per-interface lock that protects
most of the per-interface data that we need to keep
track of, and sprinkle assertions about that lock
everywhere. Some things now need to be offloaded to
work structs so that we don't require being able to
sleep in functions the drivers call. The exception
to that are the MLME callbacks (rx_auth etc.) that
currently only mac80211 calls because it was easier
to do that there instead of in cfg80211, and future
drivers implementing those calls will, if they ever
exist, probably need to use a similar scheme like
mac80211 anyway...

In order to be able to handle _deauth and _disassoc
properly, introduce a cookie passed to it that will
determine locking requirements.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-07-10 15:02:32 -04:00

1421 lines
34 KiB
C

/*
* mac80211 configuration hooks for cfg80211
*
* Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
*
* This file is GPLv2 as found in COPYING.
*/
#include <linux/ieee80211.h>
#include <linux/nl80211.h>
#include <linux/rtnetlink.h>
#include <net/net_namespace.h>
#include <linux/rcupdate.h>
#include <net/cfg80211.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
#include "cfg.h"
#include "rate.h"
#include "mesh.h"
static bool nl80211_type_check(enum nl80211_iftype type)
{
switch (type) {
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_MONITOR:
#ifdef CONFIG_MAC80211_MESH
case NL80211_IFTYPE_MESH_POINT:
#endif
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_AP_VLAN:
case NL80211_IFTYPE_WDS:
return true;
default:
return false;
}
}
static int ieee80211_add_iface(struct wiphy *wiphy, char *name,
enum nl80211_iftype type, u32 *flags,
struct vif_params *params)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
struct net_device *dev;
struct ieee80211_sub_if_data *sdata;
int err;
if (!nl80211_type_check(type))
return -EINVAL;
err = ieee80211_if_add(local, name, &dev, type, params);
if (err || type != NL80211_IFTYPE_MONITOR || !flags)
return err;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
sdata->u.mntr_flags = *flags;
return 0;
}
static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex)
{
struct net_device *dev;
struct ieee80211_sub_if_data *sdata;
/* we're under RTNL */
dev = __dev_get_by_index(&init_net, ifindex);
if (!dev)
return -ENODEV;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
ieee80211_if_remove(sdata);
return 0;
}
static int ieee80211_change_iface(struct wiphy *wiphy,
struct net_device *dev,
enum nl80211_iftype type, u32 *flags,
struct vif_params *params)
{
struct ieee80211_sub_if_data *sdata;
int ret;
if (!nl80211_type_check(type))
return -EINVAL;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
ret = ieee80211_if_change_type(sdata, type);
if (ret)
return ret;
if (netif_running(sdata->dev))
return -EBUSY;
if (ieee80211_vif_is_mesh(&sdata->vif) && params->mesh_id_len)
ieee80211_sdata_set_mesh_id(sdata,
params->mesh_id_len,
params->mesh_id);
if (sdata->vif.type != NL80211_IFTYPE_MONITOR || !flags)
return 0;
sdata->u.mntr_flags = *flags;
return 0;
}
static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
u8 key_idx, const u8 *mac_addr,
struct key_params *params)
{
struct ieee80211_sub_if_data *sdata;
struct sta_info *sta = NULL;
enum ieee80211_key_alg alg;
struct ieee80211_key *key;
int err;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
switch (params->cipher) {
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
alg = ALG_WEP;
break;
case WLAN_CIPHER_SUITE_TKIP:
alg = ALG_TKIP;
break;
case WLAN_CIPHER_SUITE_CCMP:
alg = ALG_CCMP;
break;
case WLAN_CIPHER_SUITE_AES_CMAC:
alg = ALG_AES_CMAC;
break;
default:
return -EINVAL;
}
key = ieee80211_key_alloc(alg, key_idx, params->key_len, params->key,
params->seq_len, params->seq);
if (!key)
return -ENOMEM;
rcu_read_lock();
if (mac_addr) {
sta = sta_info_get(sdata->local, mac_addr);
if (!sta) {
ieee80211_key_free(key);
err = -ENOENT;
goto out_unlock;
}
}
ieee80211_key_link(key, sdata, sta);
err = 0;
out_unlock:
rcu_read_unlock();
return err;
}
static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,
u8 key_idx, const u8 *mac_addr)
{
struct ieee80211_sub_if_data *sdata;
struct sta_info *sta;
int ret;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
rcu_read_lock();
if (mac_addr) {
ret = -ENOENT;
sta = sta_info_get(sdata->local, mac_addr);
if (!sta)
goto out_unlock;
if (sta->key) {
ieee80211_key_free(sta->key);
WARN_ON(sta->key);
ret = 0;
}
goto out_unlock;
}
if (!sdata->keys[key_idx]) {
ret = -ENOENT;
goto out_unlock;
}
ieee80211_key_free(sdata->keys[key_idx]);
WARN_ON(sdata->keys[key_idx]);
ret = 0;
out_unlock:
rcu_read_unlock();
return ret;
}
static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
u8 key_idx, const u8 *mac_addr, void *cookie,
void (*callback)(void *cookie,
struct key_params *params))
{
struct ieee80211_sub_if_data *sdata;
struct sta_info *sta = NULL;
u8 seq[6] = {0};
struct key_params params;
struct ieee80211_key *key;
u32 iv32;
u16 iv16;
int err = -ENOENT;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
rcu_read_lock();
if (mac_addr) {
sta = sta_info_get(sdata->local, mac_addr);
if (!sta)
goto out;
key = sta->key;
} else
key = sdata->keys[key_idx];
if (!key)
goto out;
memset(&params, 0, sizeof(params));
switch (key->conf.alg) {
case ALG_TKIP:
params.cipher = WLAN_CIPHER_SUITE_TKIP;
iv32 = key->u.tkip.tx.iv32;
iv16 = key->u.tkip.tx.iv16;
if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
drv_get_tkip_seq(sdata->local,
key->conf.hw_key_idx,
&iv32, &iv16);
seq[0] = iv16 & 0xff;
seq[1] = (iv16 >> 8) & 0xff;
seq[2] = iv32 & 0xff;
seq[3] = (iv32 >> 8) & 0xff;
seq[4] = (iv32 >> 16) & 0xff;
seq[5] = (iv32 >> 24) & 0xff;
params.seq = seq;
params.seq_len = 6;
break;
case ALG_CCMP:
params.cipher = WLAN_CIPHER_SUITE_CCMP;
seq[0] = key->u.ccmp.tx_pn[5];
seq[1] = key->u.ccmp.tx_pn[4];
seq[2] = key->u.ccmp.tx_pn[3];
seq[3] = key->u.ccmp.tx_pn[2];
seq[4] = key->u.ccmp.tx_pn[1];
seq[5] = key->u.ccmp.tx_pn[0];
params.seq = seq;
params.seq_len = 6;
break;
case ALG_WEP:
if (key->conf.keylen == 5)
params.cipher = WLAN_CIPHER_SUITE_WEP40;
else
params.cipher = WLAN_CIPHER_SUITE_WEP104;
break;
case ALG_AES_CMAC:
params.cipher = WLAN_CIPHER_SUITE_AES_CMAC;
seq[0] = key->u.aes_cmac.tx_pn[5];
seq[1] = key->u.aes_cmac.tx_pn[4];
seq[2] = key->u.aes_cmac.tx_pn[3];
seq[3] = key->u.aes_cmac.tx_pn[2];
seq[4] = key->u.aes_cmac.tx_pn[1];
seq[5] = key->u.aes_cmac.tx_pn[0];
params.seq = seq;
params.seq_len = 6;
break;
}
params.key = key->conf.key;
params.key_len = key->conf.keylen;
callback(cookie, &params);
err = 0;
out:
rcu_read_unlock();
return err;
}
static int ieee80211_config_default_key(struct wiphy *wiphy,
struct net_device *dev,
u8 key_idx)
{
struct ieee80211_sub_if_data *sdata;
rcu_read_lock();
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
ieee80211_set_default_key(sdata, key_idx);
rcu_read_unlock();
return 0;
}
static int ieee80211_config_default_mgmt_key(struct wiphy *wiphy,
struct net_device *dev,
u8 key_idx)
{
struct ieee80211_sub_if_data *sdata;
rcu_read_lock();
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
ieee80211_set_default_mgmt_key(sdata, key_idx);
rcu_read_unlock();
return 0;
}
static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
sinfo->filled = STATION_INFO_INACTIVE_TIME |
STATION_INFO_RX_BYTES |
STATION_INFO_TX_BYTES |
STATION_INFO_RX_PACKETS |
STATION_INFO_TX_PACKETS |
STATION_INFO_TX_BITRATE;
sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
sinfo->rx_bytes = sta->rx_bytes;
sinfo->tx_bytes = sta->tx_bytes;
sinfo->rx_packets = sta->rx_packets;
sinfo->tx_packets = sta->tx_packets;
if (sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
sinfo->filled |= STATION_INFO_SIGNAL;
sinfo->signal = (s8)sta->last_signal;
}
sinfo->txrate.flags = 0;
if (sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS)
sinfo->txrate.flags |= RATE_INFO_FLAGS_MCS;
if (sta->last_tx_rate.flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
sinfo->txrate.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
if (sta->last_tx_rate.flags & IEEE80211_TX_RC_SHORT_GI)
sinfo->txrate.flags |= RATE_INFO_FLAGS_SHORT_GI;
if (!(sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS)) {
struct ieee80211_supported_band *sband;
sband = sta->local->hw.wiphy->bands[
sta->local->hw.conf.channel->band];
sinfo->txrate.legacy =
sband->bitrates[sta->last_tx_rate.idx].bitrate;
} else
sinfo->txrate.mcs = sta->last_tx_rate.idx;
if (ieee80211_vif_is_mesh(&sdata->vif)) {
#ifdef CONFIG_MAC80211_MESH
sinfo->filled |= STATION_INFO_LLID |
STATION_INFO_PLID |
STATION_INFO_PLINK_STATE;
sinfo->llid = le16_to_cpu(sta->llid);
sinfo->plid = le16_to_cpu(sta->plid);
sinfo->plink_state = sta->plink_state;
#endif
}
}
static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
int idx, u8 *mac, struct station_info *sinfo)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct sta_info *sta;
int ret = -ENOENT;
rcu_read_lock();
sta = sta_info_get_by_idx(local, idx, dev);
if (sta) {
ret = 0;
memcpy(mac, sta->sta.addr, ETH_ALEN);
sta_set_sinfo(sta, sinfo);
}
rcu_read_unlock();
return ret;
}
static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,
u8 *mac, struct station_info *sinfo)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct sta_info *sta;
int ret = -ENOENT;
rcu_read_lock();
/* XXX: verify sta->dev == dev */
sta = sta_info_get(local, mac);
if (sta) {
ret = 0;
sta_set_sinfo(sta, sinfo);
}
rcu_read_unlock();
return ret;
}
/*
* This handles both adding a beacon and setting new beacon info
*/
static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
struct beacon_parameters *params)
{
struct beacon_data *new, *old;
int new_head_len, new_tail_len;
int size;
int err = -EINVAL;
old = sdata->u.ap.beacon;
/* head must not be zero-length */
if (params->head && !params->head_len)
return -EINVAL;
/*
* This is a kludge. beacon interval should really be part
* of the beacon information.
*/
if (params->interval &&
(sdata->vif.bss_conf.beacon_int != params->interval)) {
sdata->vif.bss_conf.beacon_int = params->interval;
ieee80211_bss_info_change_notify(sdata,
BSS_CHANGED_BEACON_INT);
}
/* Need to have a beacon head if we don't have one yet */
if (!params->head && !old)
return err;
/* sorry, no way to start beaconing without dtim period */
if (!params->dtim_period && !old)
return err;
/* new or old head? */
if (params->head)
new_head_len = params->head_len;
else
new_head_len = old->head_len;
/* new or old tail? */
if (params->tail || !old)
/* params->tail_len will be zero for !params->tail */
new_tail_len = params->tail_len;
else
new_tail_len = old->tail_len;
size = sizeof(*new) + new_head_len + new_tail_len;
new = kzalloc(size, GFP_KERNEL);
if (!new)
return -ENOMEM;
/* start filling the new info now */
/* new or old dtim period? */
if (params->dtim_period)
new->dtim_period = params->dtim_period;
else
new->dtim_period = old->dtim_period;
/*
* pointers go into the block we allocated,
* memory is | beacon_data | head | tail |
*/
new->head = ((u8 *) new) + sizeof(*new);
new->tail = new->head + new_head_len;
new->head_len = new_head_len;
new->tail_len = new_tail_len;
/* copy in head */
if (params->head)
memcpy(new->head, params->head, new_head_len);
else
memcpy(new->head, old->head, new_head_len);
/* copy in optional tail */
if (params->tail)
memcpy(new->tail, params->tail, new_tail_len);
else
if (old)
memcpy(new->tail, old->tail, new_tail_len);
rcu_assign_pointer(sdata->u.ap.beacon, new);
synchronize_rcu();
kfree(old);
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED |
BSS_CHANGED_BEACON);
return 0;
}
static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
struct beacon_parameters *params)
{
struct ieee80211_sub_if_data *sdata;
struct beacon_data *old;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
old = sdata->u.ap.beacon;
if (old)
return -EALREADY;
return ieee80211_config_beacon(sdata, params);
}
static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
struct beacon_parameters *params)
{
struct ieee80211_sub_if_data *sdata;
struct beacon_data *old;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
old = sdata->u.ap.beacon;
if (!old)
return -ENOENT;
return ieee80211_config_beacon(sdata, params);
}
static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
{
struct ieee80211_sub_if_data *sdata;
struct beacon_data *old;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
old = sdata->u.ap.beacon;
if (!old)
return -ENOENT;
rcu_assign_pointer(sdata->u.ap.beacon, NULL);
synchronize_rcu();
kfree(old);
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
return 0;
}
/* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
struct iapp_layer2_update {
u8 da[ETH_ALEN]; /* broadcast */
u8 sa[ETH_ALEN]; /* STA addr */
__be16 len; /* 6 */
u8 dsap; /* 0 */
u8 ssap; /* 0 */
u8 control;
u8 xid_info[3];
} __attribute__ ((packed));
static void ieee80211_send_layer2_update(struct sta_info *sta)
{
struct iapp_layer2_update *msg;
struct sk_buff *skb;
/* Send Level 2 Update Frame to update forwarding tables in layer 2
* bridge devices */
skb = dev_alloc_skb(sizeof(*msg));
if (!skb)
return;
msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
/* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
* Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
memset(msg->da, 0xff, ETH_ALEN);
memcpy(msg->sa, sta->sta.addr, ETH_ALEN);
msg->len = htons(6);
msg->dsap = 0;
msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */
msg->control = 0xaf; /* XID response lsb.1111F101.
* F=0 (no poll command; unsolicited frame) */
msg->xid_info[0] = 0x81; /* XID format identifier */
msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */
msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */
skb->dev = sta->sdata->dev;
skb->protocol = eth_type_trans(skb, sta->sdata->dev);
memset(skb->cb, 0, sizeof(skb->cb));
netif_rx(skb);
}
static void sta_apply_parameters(struct ieee80211_local *local,
struct sta_info *sta,
struct station_parameters *params)
{
u32 rates;
int i, j;
struct ieee80211_supported_band *sband;
struct ieee80211_sub_if_data *sdata = sta->sdata;
u32 mask, set;
sband = local->hw.wiphy->bands[local->oper_channel->band];
spin_lock_bh(&sta->lock);
mask = params->sta_flags_mask;
set = params->sta_flags_set;
if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
sta->flags &= ~WLAN_STA_AUTHORIZED;
if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))
sta->flags |= WLAN_STA_AUTHORIZED;
}
if (mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {
sta->flags &= ~WLAN_STA_SHORT_PREAMBLE;
if (set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
sta->flags |= WLAN_STA_SHORT_PREAMBLE;
}
if (mask & BIT(NL80211_STA_FLAG_WME)) {
sta->flags &= ~WLAN_STA_WME;
if (set & BIT(NL80211_STA_FLAG_WME))
sta->flags |= WLAN_STA_WME;
}
if (mask & BIT(NL80211_STA_FLAG_MFP)) {
sta->flags &= ~WLAN_STA_MFP;
if (set & BIT(NL80211_STA_FLAG_MFP))
sta->flags |= WLAN_STA_MFP;
}
spin_unlock_bh(&sta->lock);
/*
* cfg80211 validates this (1-2007) and allows setting the AID
* only when creating a new station entry
*/
if (params->aid)
sta->sta.aid = params->aid;
/*
* FIXME: updating the following information is racy when this
* function is called from ieee80211_change_station().
* However, all this information should be static so
* maybe we should just reject attemps to change it.
*/
if (params->listen_interval >= 0)
sta->listen_interval = params->listen_interval;
if (params->supported_rates) {
rates = 0;
for (i = 0; i < params->supported_rates_len; i++) {
int rate = (params->supported_rates[i] & 0x7f) * 5;
for (j = 0; j < sband->n_bitrates; j++) {
if (sband->bitrates[j].bitrate == rate)
rates |= BIT(j);
}
}
sta->sta.supp_rates[local->oper_channel->band] = rates;
}
if (params->ht_capa)
ieee80211_ht_cap_ie_to_sta_ht_cap(sband,
params->ht_capa,
&sta->sta.ht_cap);
if (ieee80211_vif_is_mesh(&sdata->vif) && params->plink_action) {
switch (params->plink_action) {
case PLINK_ACTION_OPEN:
mesh_plink_open(sta);
break;
case PLINK_ACTION_BLOCK:
mesh_plink_block(sta);
break;
}
}
}
static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
u8 *mac, struct station_parameters *params)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
struct sta_info *sta;
struct ieee80211_sub_if_data *sdata;
int err;
int layer2_update;
if (params->vlan) {
sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
sdata->vif.type != NL80211_IFTYPE_AP)
return -EINVAL;
} else
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (compare_ether_addr(mac, dev->dev_addr) == 0)
return -EINVAL;
if (is_multicast_ether_addr(mac))
return -EINVAL;
sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
if (!sta)
return -ENOMEM;
sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
sta_apply_parameters(local, sta, params);
rate_control_rate_init(sta);
layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
sdata->vif.type == NL80211_IFTYPE_AP;
rcu_read_lock();
err = sta_info_insert(sta);
if (err) {
/* STA has been freed */
if (err == -EEXIST && layer2_update) {
/* Need to update layer 2 devices on reassociation */
sta = sta_info_get(local, mac);
if (sta)
ieee80211_send_layer2_update(sta);
}
rcu_read_unlock();
return err;
}
if (layer2_update)
ieee80211_send_layer2_update(sta);
rcu_read_unlock();
return 0;
}
static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
u8 *mac)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
struct ieee80211_sub_if_data *sdata;
struct sta_info *sta;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (mac) {
rcu_read_lock();
/* XXX: get sta belonging to dev */
sta = sta_info_get(local, mac);
if (!sta) {
rcu_read_unlock();
return -ENOENT;
}
sta_info_unlink(&sta);
rcu_read_unlock();
sta_info_destroy(sta);
} else
sta_info_flush(local, sdata);
return 0;
}
static int ieee80211_change_station(struct wiphy *wiphy,
struct net_device *dev,
u8 *mac,
struct station_parameters *params)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
struct sta_info *sta;
struct ieee80211_sub_if_data *vlansdata;
rcu_read_lock();
/* XXX: get sta belonging to dev */
sta = sta_info_get(local, mac);
if (!sta) {
rcu_read_unlock();
return -ENOENT;
}
if (params->vlan && params->vlan != sta->sdata->dev) {
vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);
if (vlansdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
vlansdata->vif.type != NL80211_IFTYPE_AP) {
rcu_read_unlock();
return -EINVAL;
}
sta->sdata = vlansdata;
ieee80211_send_layer2_update(sta);
}
sta_apply_parameters(local, sta, params);
rcu_read_unlock();
return 0;
}
#ifdef CONFIG_MAC80211_MESH
static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
u8 *dst, u8 *next_hop)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
struct ieee80211_sub_if_data *sdata;
struct mesh_path *mpath;
struct sta_info *sta;
int err;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
rcu_read_lock();
sta = sta_info_get(local, next_hop);
if (!sta) {
rcu_read_unlock();
return -ENOENT;
}
err = mesh_path_add(dst, sdata);
if (err) {
rcu_read_unlock();
return err;
}
mpath = mesh_path_lookup(dst, sdata);
if (!mpath) {
rcu_read_unlock();
return -ENXIO;
}
mesh_path_fix_nexthop(mpath, sta);
rcu_read_unlock();
return 0;
}
static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
u8 *dst)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (dst)
return mesh_path_del(dst, sdata);
mesh_path_flush(sdata);
return 0;
}
static int ieee80211_change_mpath(struct wiphy *wiphy,
struct net_device *dev,
u8 *dst, u8 *next_hop)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
struct ieee80211_sub_if_data *sdata;
struct mesh_path *mpath;
struct sta_info *sta;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
rcu_read_lock();
sta = sta_info_get(local, next_hop);
if (!sta) {
rcu_read_unlock();
return -ENOENT;
}
mpath = mesh_path_lookup(dst, sdata);
if (!mpath) {
rcu_read_unlock();
return -ENOENT;
}
mesh_path_fix_nexthop(mpath, sta);
rcu_read_unlock();
return 0;
}
static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
struct mpath_info *pinfo)
{
if (mpath->next_hop)
memcpy(next_hop, mpath->next_hop->sta.addr, ETH_ALEN);
else
memset(next_hop, 0, ETH_ALEN);
pinfo->filled = MPATH_INFO_FRAME_QLEN |
MPATH_INFO_DSN |
MPATH_INFO_METRIC |
MPATH_INFO_EXPTIME |
MPATH_INFO_DISCOVERY_TIMEOUT |
MPATH_INFO_DISCOVERY_RETRIES |
MPATH_INFO_FLAGS;
pinfo->frame_qlen = mpath->frame_queue.qlen;
pinfo->dsn = mpath->dsn;
pinfo->metric = mpath->metric;
if (time_before(jiffies, mpath->exp_time))
pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
pinfo->discovery_timeout =
jiffies_to_msecs(mpath->discovery_timeout);
pinfo->discovery_retries = mpath->discovery_retries;
pinfo->flags = 0;
if (mpath->flags & MESH_PATH_ACTIVE)
pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
if (mpath->flags & MESH_PATH_RESOLVING)
pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
if (mpath->flags & MESH_PATH_DSN_VALID)
pinfo->flags |= NL80211_MPATH_FLAG_DSN_VALID;
if (mpath->flags & MESH_PATH_FIXED)
pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
if (mpath->flags & MESH_PATH_RESOLVING)
pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
pinfo->flags = mpath->flags;
}
static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
{
struct ieee80211_sub_if_data *sdata;
struct mesh_path *mpath;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
rcu_read_lock();
mpath = mesh_path_lookup(dst, sdata);
if (!mpath) {
rcu_read_unlock();
return -ENOENT;
}
memcpy(dst, mpath->dst, ETH_ALEN);
mpath_set_pinfo(mpath, next_hop, pinfo);
rcu_read_unlock();
return 0;
}
static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
int idx, u8 *dst, u8 *next_hop,
struct mpath_info *pinfo)
{
struct ieee80211_sub_if_data *sdata;
struct mesh_path *mpath;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
rcu_read_lock();
mpath = mesh_path_lookup_by_idx(idx, sdata);
if (!mpath) {
rcu_read_unlock();
return -ENOENT;
}
memcpy(dst, mpath->dst, ETH_ALEN);
mpath_set_pinfo(mpath, next_hop, pinfo);
rcu_read_unlock();
return 0;
}
static int ieee80211_get_mesh_params(struct wiphy *wiphy,
struct net_device *dev,
struct mesh_config *conf)
{
struct ieee80211_sub_if_data *sdata;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
return 0;
}
static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
{
return (mask >> (parm-1)) & 0x1;
}
static int ieee80211_set_mesh_params(struct wiphy *wiphy,
struct net_device *dev,
const struct mesh_config *nconf, u32 mask)
{
struct mesh_config *conf;
struct ieee80211_sub_if_data *sdata;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
/* Set the config options which we are interested in setting */
conf = &(sdata->u.mesh.mshcfg);
if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
conf->dot11MeshTTL = nconf->dot11MeshTTL;
if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask))
conf->auto_open_plinks = nconf->auto_open_plinks;
if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
conf->dot11MeshHWMPmaxPREQretries =
nconf->dot11MeshHWMPmaxPREQretries;
if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
conf->path_refresh_time = nconf->path_refresh_time;
if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
conf->min_discovery_timeout = nconf->min_discovery_timeout;
if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
conf->dot11MeshHWMPactivePathTimeout =
nconf->dot11MeshHWMPactivePathTimeout;
if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
conf->dot11MeshHWMPpreqMinInterval =
nconf->dot11MeshHWMPpreqMinInterval;
if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
mask))
conf->dot11MeshHWMPnetDiameterTraversalTime =
nconf->dot11MeshHWMPnetDiameterTraversalTime;
return 0;
}
#endif
static int ieee80211_change_bss(struct wiphy *wiphy,
struct net_device *dev,
struct bss_parameters *params)
{
struct ieee80211_sub_if_data *sdata;
u32 changed = 0;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (params->use_cts_prot >= 0) {
sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;
changed |= BSS_CHANGED_ERP_CTS_PROT;
}
if (params->use_short_preamble >= 0) {
sdata->vif.bss_conf.use_short_preamble =
params->use_short_preamble;
changed |= BSS_CHANGED_ERP_PREAMBLE;
}
if (params->use_short_slot_time >= 0) {
sdata->vif.bss_conf.use_short_slot =
params->use_short_slot_time;
changed |= BSS_CHANGED_ERP_SLOT;
}
if (params->basic_rates) {
int i, j;
u32 rates = 0;
struct ieee80211_local *local = wiphy_priv(wiphy);
struct ieee80211_supported_band *sband =
wiphy->bands[local->oper_channel->band];
for (i = 0; i < params->basic_rates_len; i++) {
int rate = (params->basic_rates[i] & 0x7f) * 5;
for (j = 0; j < sband->n_bitrates; j++) {
if (sband->bitrates[j].bitrate == rate)
rates |= BIT(j);
}
}
sdata->vif.bss_conf.basic_rates = rates;
changed |= BSS_CHANGED_BASIC_RATES;
}
ieee80211_bss_info_change_notify(sdata, changed);
return 0;
}
static int ieee80211_set_txq_params(struct wiphy *wiphy,
struct ieee80211_txq_params *params)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
struct ieee80211_tx_queue_params p;
if (!local->ops->conf_tx)
return -EOPNOTSUPP;
memset(&p, 0, sizeof(p));
p.aifs = params->aifs;
p.cw_max = params->cwmax;
p.cw_min = params->cwmin;
p.txop = params->txop;
if (drv_conf_tx(local, params->queue, &p)) {
printk(KERN_DEBUG "%s: failed to set TX queue "
"parameters for queue %d\n",
wiphy_name(local->hw.wiphy), params->queue);
return -EINVAL;
}
return 0;
}
static int ieee80211_set_channel(struct wiphy *wiphy,
struct ieee80211_channel *chan,
enum nl80211_channel_type channel_type)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
local->oper_channel = chan;
local->oper_channel_type = channel_type;
return ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
}
#ifdef CONFIG_PM
static int ieee80211_suspend(struct wiphy *wiphy)
{
return __ieee80211_suspend(wiphy_priv(wiphy));
}
static int ieee80211_resume(struct wiphy *wiphy)
{
return __ieee80211_resume(wiphy_priv(wiphy));
}
#else
#define ieee80211_suspend NULL
#define ieee80211_resume NULL
#endif
static int ieee80211_scan(struct wiphy *wiphy,
struct net_device *dev,
struct cfg80211_scan_request *req)
{
struct ieee80211_sub_if_data *sdata;
sdata = IEEE80211_DEV_TO_SUB_IF(dev);
if (sdata->vif.type != NL80211_IFTYPE_STATION &&
sdata->vif.type != NL80211_IFTYPE_ADHOC &&
sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
(sdata->vif.type != NL80211_IFTYPE_AP || sdata->u.ap.beacon))
return -EOPNOTSUPP;
return ieee80211_request_scan(sdata, req);
}
static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_auth_request *req)
{
return ieee80211_mgd_auth(IEEE80211_DEV_TO_SUB_IF(dev), req);
}
static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_assoc_request *req)
{
return ieee80211_mgd_assoc(IEEE80211_DEV_TO_SUB_IF(dev), req);
}
static int ieee80211_deauth(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_deauth_request *req,
void *cookie)
{
return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev),
req, cookie);
}
static int ieee80211_disassoc(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_disassoc_request *req,
void *cookie)
{
return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev),
req, cookie);
}
static int ieee80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_ibss_params *params)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
return ieee80211_ibss_join(sdata, params);
}
static int ieee80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
return ieee80211_ibss_leave(sdata);
}
static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
int err;
if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
err = drv_set_rts_threshold(local, wiphy->rts_threshold);
if (err)
return err;
}
if (changed & WIPHY_PARAM_RETRY_SHORT)
local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
if (changed & WIPHY_PARAM_RETRY_LONG)
local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
if (changed &
(WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
return 0;
}
static int ieee80211_set_tx_power(struct wiphy *wiphy,
enum tx_power_setting type, int dbm)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
struct ieee80211_channel *chan = local->hw.conf.channel;
u32 changes = 0;
switch (type) {
case TX_POWER_AUTOMATIC:
local->user_power_level = -1;
break;
case TX_POWER_LIMITED:
if (dbm < 0)
return -EINVAL;
local->user_power_level = dbm;
break;
case TX_POWER_FIXED:
if (dbm < 0)
return -EINVAL;
/* TODO: move to cfg80211 when it knows the channel */
if (dbm > chan->max_power)
return -EINVAL;
local->user_power_level = dbm;
break;
}
ieee80211_hw_config(local, changes);
return 0;
}
static int ieee80211_get_tx_power(struct wiphy *wiphy, int *dbm)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
*dbm = local->hw.conf.power_level;
return 0;
}
static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
u8 *addr)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
memcpy(&sdata->u.wds.remote_addr, addr, ETH_ALEN);
return 0;
}
static void ieee80211_rfkill_poll(struct wiphy *wiphy)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
drv_rfkill_poll(local);
}
#ifdef CONFIG_NL80211_TESTMODE
int ieee80211_testmode_cmd(struct wiphy *wiphy, void *data, int len)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
if (!local->ops->testmode_cmd)
return -EOPNOTSUPP;
return local->ops->testmode_cmd(&local->hw, data, len);
}
#endif
static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
bool enabled, int timeout)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_conf *conf = &local->hw.conf;
if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS))
return -EOPNOTSUPP;
if (enabled == sdata->u.mgd.powersave &&
timeout == conf->dynamic_ps_timeout)
return 0;
sdata->u.mgd.powersave = enabled;
conf->dynamic_ps_timeout = timeout;
if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
ieee80211_recalc_ps(local, -1);
return 0;
}
static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
struct net_device *dev,
const u8 *addr,
const struct cfg80211_bitrate_mask *mask)
{
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
int i, err = -EINVAL;
u32 target_rate;
struct ieee80211_supported_band *sband;
sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
/* 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->max_ratectrl_rateidx = -1;
sdata->force_unicast_rateidx = -1;
if (mask->fixed)
target_rate = mask->fixed / 100;
else if (mask->maxrate)
target_rate = mask->maxrate / 100;
else
return 0;
for (i=0; i< sband->n_bitrates; i++) {
struct ieee80211_rate *brate = &sband->bitrates[i];
int this_rate = brate->bitrate;
if (target_rate == this_rate) {
sdata->max_ratectrl_rateidx = i;
if (mask->fixed)
sdata->force_unicast_rateidx = i;
err = 0;
break;
}
}
return err;
}
struct cfg80211_ops mac80211_config_ops = {
.add_virtual_intf = ieee80211_add_iface,
.del_virtual_intf = ieee80211_del_iface,
.change_virtual_intf = ieee80211_change_iface,
.add_key = ieee80211_add_key,
.del_key = ieee80211_del_key,
.get_key = ieee80211_get_key,
.set_default_key = ieee80211_config_default_key,
.set_default_mgmt_key = ieee80211_config_default_mgmt_key,
.add_beacon = ieee80211_add_beacon,
.set_beacon = ieee80211_set_beacon,
.del_beacon = ieee80211_del_beacon,
.add_station = ieee80211_add_station,
.del_station = ieee80211_del_station,
.change_station = ieee80211_change_station,
.get_station = ieee80211_get_station,
.dump_station = ieee80211_dump_station,
#ifdef CONFIG_MAC80211_MESH
.add_mpath = ieee80211_add_mpath,
.del_mpath = ieee80211_del_mpath,
.change_mpath = ieee80211_change_mpath,
.get_mpath = ieee80211_get_mpath,
.dump_mpath = ieee80211_dump_mpath,
.set_mesh_params = ieee80211_set_mesh_params,
.get_mesh_params = ieee80211_get_mesh_params,
#endif
.change_bss = ieee80211_change_bss,
.set_txq_params = ieee80211_set_txq_params,
.set_channel = ieee80211_set_channel,
.suspend = ieee80211_suspend,
.resume = ieee80211_resume,
.scan = ieee80211_scan,
.auth = ieee80211_auth,
.assoc = ieee80211_assoc,
.deauth = ieee80211_deauth,
.disassoc = ieee80211_disassoc,
.join_ibss = ieee80211_join_ibss,
.leave_ibss = ieee80211_leave_ibss,
.set_wiphy_params = ieee80211_set_wiphy_params,
.set_tx_power = ieee80211_set_tx_power,
.get_tx_power = ieee80211_get_tx_power,
.set_wds_peer = ieee80211_set_wds_peer,
.rfkill_poll = ieee80211_rfkill_poll,
CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
.set_power_mgmt = ieee80211_set_power_mgmt,
.set_bitrate_mask = ieee80211_set_bitrate_mask,
};