- 根目录:
- net
- wireless
- mlme.c
/*
* cfg80211 MLME SAP interface
*
* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
* Copyright (c) 2015 Intel Deutschland GmbH
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/nl80211.h>
#include <linux/slab.h>
#include <linux/wireless.h>
#include <net/cfg80211.h>
#include <net/iw_handler.h>
#include "core.h"
#include "nl80211.h"
#include "rdev-ops.h"
void cfg80211_rx_assoc_resp(struct net_device *dev, struct cfg80211_bss *bss,
const u8 *buf, size_t len, int uapsd_queues)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
u8 *ie = mgmt->u.assoc_resp.variable;
int ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);
u16 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
trace_cfg80211_send_rx_assoc(dev, bss);
/*
* This is a bit of a hack, we don't notify userspace of
* a (re-)association reply if we tried to send a reassoc
* and got a reject -- we only try again with an assoc
* frame instead of reassoc.
*/
if (cfg80211_sme_rx_assoc_resp(wdev, status_code)) {
cfg80211_unhold_bss(bss_from_pub(bss));
cfg80211_put_bss(wiphy, bss);
return;
}
nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL, uapsd_queues);
/* update current_bss etc., consumes the bss reference */
__cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
status_code,
status_code == WLAN_STATUS_SUCCESS, bss);
}
EXPORT_SYMBOL(cfg80211_rx_assoc_resp);
static void cfg80211_process_auth(struct wireless_dev *wdev,
const u8 *buf, size_t len)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
nl80211_send_rx_auth(rdev, wdev->netdev, buf, len, GFP_KERNEL);
cfg80211_sme_rx_auth(wdev, buf, len);
}
static void cfg80211_process_deauth(struct wireless_dev *wdev,
const u8 *buf, size_t len)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
const u8 *bssid = mgmt->bssid;
u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
nl80211_send_deauth(rdev, wdev->netdev, buf, len, GFP_KERNEL);
if (!wdev->current_bss ||
!ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
return;
__cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
cfg80211_sme_deauth(wdev);
}
static void cfg80211_process_disassoc(struct wireless_dev *wdev,
const u8 *buf, size_t len)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
const u8 *bssid = mgmt->bssid;
u16 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
nl80211_send_disassoc(rdev, wdev->netdev, buf, len, GFP_KERNEL);
if (WARN_ON(!wdev->current_bss ||
!ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
return;
__cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
cfg80211_sme_disassoc(wdev);
}
void cfg80211_rx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct ieee80211_mgmt *mgmt = (void *)buf;
ASSERT_WDEV_LOCK(wdev);
trace_cfg80211_rx_mlme_mgmt(dev, buf, len);
if (WARN_ON(len < 2))
return;
if (ieee80211_is_auth(mgmt->frame_control))
cfg80211_process_auth(wdev, buf, len);
else if (ieee80211_is_deauth(mgmt->frame_control))
cfg80211_process_deauth(wdev, buf, len);
else if (ieee80211_is_disassoc(mgmt->frame_control))
cfg80211_process_disassoc(wdev, buf, len);
}
EXPORT_SYMBOL(cfg80211_rx_mlme_mgmt);
void cfg80211_auth_timeout(struct net_device *dev, const u8 *addr)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
trace_cfg80211_send_auth_timeout(dev, addr);
nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
cfg80211_sme_auth_timeout(wdev);
}
EXPORT_SYMBOL(cfg80211_auth_timeout);
void cfg80211_assoc_timeout(struct net_device *dev, struct cfg80211_bss *bss)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
trace_cfg80211_send_assoc_timeout(dev, bss->bssid);
nl80211_send_assoc_timeout(rdev, dev, bss->bssid, GFP_KERNEL);
cfg80211_sme_assoc_timeout(wdev);
cfg80211_unhold_bss(bss_from_pub(bss));
cfg80211_put_bss(wiphy, bss);
}
EXPORT_SYMBOL(cfg80211_assoc_timeout);
void cfg80211_tx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct ieee80211_mgmt *mgmt = (void *)buf;
ASSERT_WDEV_LOCK(wdev);
trace_cfg80211_tx_mlme_mgmt(dev, buf, len);
if (WARN_ON(len < 2))
return;
if (ieee80211_is_deauth(mgmt->frame_control))
cfg80211_process_deauth(wdev, buf, len);
else
cfg80211_process_disassoc(wdev, buf, len);
}
EXPORT_SYMBOL(cfg80211_tx_mlme_mgmt);
void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
enum nl80211_key_type key_type, int key_id,
const u8 *tsc, gfp_t gfp)
{
struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
#ifdef CONFIG_CFG80211_WEXT
union iwreq_data wrqu;
char *buf = kmalloc(128, gfp);
if (buf) {
sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
"keyid=%d %scast addr=%pM)", key_id,
key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni",
addr);
memset(&wrqu, 0, sizeof(wrqu));
wrqu.data.length = strlen(buf);
wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
kfree(buf);
}
#endif
trace_cfg80211_michael_mic_failure(dev, addr, key_type, key_id, tsc);
nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp);
}
EXPORT_SYMBOL(cfg80211_michael_mic_failure);
/* some MLME handling for userspace SME */
int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
struct net_device *dev,
struct ieee80211_channel *chan,
enum nl80211_auth_type auth_type,
const u8 *bssid,
const u8 *ssid, int ssid_len,
const u8 *ie, int ie_len,
const u8 *key, int key_len, int key_idx,
const u8 *sae_data, int sae_data_len)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_auth_request req = {
.ie = ie,
.ie_len = ie_len,
.sae_data = sae_data,
.sae_data_len = sae_data_len,
.auth_type = auth_type,
.key = key,
.key_len = key_len,
.key_idx = key_idx,
};
int err;
ASSERT_WDEV_LOCK(wdev);
if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
if (!key || !key_len || key_idx < 0 || key_idx > 4)
return -EINVAL;
if (wdev->current_bss &&
ether_addr_equal(bssid, wdev->current_bss->pub.bssid))
return -EALREADY;
req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
IEEE80211_BSS_TYPE_ESS,
IEEE80211_PRIVACY_ANY);
if (!req.bss)
return -ENOENT;
err = rdev_auth(rdev, dev, &req);
cfg80211_put_bss(&rdev->wiphy, req.bss);
return err;
}
/* Do a logical ht_capa &= ht_capa_mask. */
void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
const struct ieee80211_ht_cap *ht_capa_mask)
{
int i;
u8 *p1, *p2;
if (!ht_capa_mask) {
memset(ht_capa, 0, sizeof(*ht_capa));
return;
}
p1 = (u8*)(ht_capa);
p2 = (u8*)(ht_capa_mask);
for (i = 0; i<sizeof(*ht_capa); i++)
p1[i] &= p2[i];
}
/* Do a logical ht_capa &= ht_capa_mask. */
void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
const struct ieee80211_vht_cap *vht_capa_mask)
{
int i;
u8 *p1, *p2;
if (!vht_capa_mask) {
memset(vht_capa, 0, sizeof(*vht_capa));
return;
}
p1 = (u8*)(vht_capa);
p2 = (u8*)(vht_capa_mask);
for (i = 0; i < sizeof(*vht_capa); i++)
p1[i] &= p2[i];
}
int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
struct net_device *dev,
struct ieee80211_channel *chan,
const u8 *bssid,
const u8 *ssid, int ssid_len,
struct cfg80211_assoc_request *req)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
int err;
ASSERT_WDEV_LOCK(wdev);
if (wdev->current_bss &&
(!req->prev_bssid || !ether_addr_equal(wdev->current_bss->pub.bssid,
req->prev_bssid)))
return -EALREADY;
cfg80211_oper_and_ht_capa(&req->ht_capa_mask,
rdev->wiphy.ht_capa_mod_mask);
cfg80211_oper_and_vht_capa(&req->vht_capa_mask,
rdev->wiphy.vht_capa_mod_mask);
req->bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
IEEE80211_BSS_TYPE_ESS,
IEEE80211_PRIVACY_ANY);
if (!req->bss)
return -ENOENT;
err = rdev_assoc(rdev, dev, req);
if (!err)
cfg80211_hold_bss(bss_from_pub(req->bss));
else
cfg80211_put_bss(&rdev->wiphy, req->bss);
return err;
}
int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
struct net_device *dev, const u8 *bssid,
const u8 *ie, int ie_len, u16 reason,
bool local_state_change)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_deauth_request req = {
.bssid = bssid,
.reason_code = reason,
.ie = ie,
.ie_len = ie_len,
.local_state_change = local_state_change,
};
ASSERT_WDEV_LOCK(wdev);
if (local_state_change &&
(!wdev->current_bss ||
!ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
return 0;
return rdev_deauth(rdev, dev, &req);
}
int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
struct net_device *dev, const u8 *bssid,
const u8 *ie, int ie_len, u16 reason,
bool local_state_change)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_disassoc_request req = {
.reason_code = reason,
.local_state_change = local_state_change,
.ie = ie,
.ie_len = ie_len,
};
int err;
ASSERT_WDEV_LOCK(wdev);
if (!wdev->current_bss)
return -ENOTCONN;
if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
req.bss = &wdev->current_bss->pub;
else
return -ENOTCONN;
err = rdev_disassoc(rdev, dev, &req);
if (err)
return err;
/* driver should have reported the disassoc */
WARN_ON(wdev->current_bss);
return 0;
}
void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
struct net_device *dev)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
u8 bssid[ETH_ALEN];
ASSERT_WDEV_LOCK(wdev);
if (!rdev->ops->deauth)
return;
if (!wdev->current_bss)
return;
memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN);
cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
WLAN_REASON_DEAUTH_LEAVING, false);
}
struct cfg80211_mgmt_registration {
struct list_head list;
struct wireless_dev *wdev;
u32 nlportid;
int match_len;
__le16 frame_type;
u8 match[];
};
static void
cfg80211_process_mlme_unregistrations(struct cfg80211_registered_device *rdev)
{
struct cfg80211_mgmt_registration *reg;
ASSERT_RTNL();
spin_lock_bh(&rdev->mlme_unreg_lock);
while ((reg = list_first_entry_or_null(&rdev->mlme_unreg,
struct cfg80211_mgmt_registration,
list))) {
list_del(®->list);
spin_unlock_bh(&rdev->mlme_unreg_lock);
if (rdev->ops->mgmt_frame_register) {
u16 frame_type = le16_to_cpu(reg->frame_type);
rdev_mgmt_frame_register(rdev, reg->wdev,
frame_type, false);
}
kfree(reg);
spin_lock_bh(&rdev->mlme_unreg_lock);
}
spin_unlock_bh(&rdev->mlme_unreg_lock);
}
void cfg80211_mlme_unreg_wk(struct work_struct *wk)
{
struct cfg80211_registered_device *rdev;
rdev = container_of(wk, struct cfg80211_registered_device,
mlme_unreg_wk);
rtnl_lock();
cfg80211_process_mlme_unregistrations(rdev);
rtnl_unlock();
}
int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
u16 frame_type, const u8 *match_data,
int match_len)
{
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
struct cfg80211_mgmt_registration *reg, *nreg;
int err = 0;
u16 mgmt_type;
if (!wdev->wiphy->mgmt_stypes)
return -EOPNOTSUPP;
if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT)
return -EINVAL;
if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE))
return -EINVAL;
mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4;
if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type)))
return -EINVAL;
nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
if (!nreg)
return -ENOMEM;
spin_lock_bh(&wdev->mgmt_registrations_lock);
list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
int mlen = min(match_len, reg->match_len);
if (frame_type != le16_to_cpu(reg->frame_type))
continue;
if (memcmp(reg->match, match_data, mlen) == 0) {
err = -EALREADY;
break;
}
}
if (err) {
kfree(nreg);
goto out;
}
memcpy(nreg->match, match_data, match_len);
nreg->match_len = match_len;
nreg->nlportid = snd_portid;
nreg->frame_type = cpu_to_le16(frame_type);
nreg->wdev = wdev;
list_add(&nreg->list, &wdev->mgmt_registrations);
spin_unlock_bh(&wdev->mgmt_registrations_lock);
/* process all unregistrations to avoid driver confusion */
cfg80211_process_mlme_unregistrations(rdev);
if (rdev->ops->mgmt_frame_register)
rdev_mgmt_frame_register(rdev, wdev, frame_type, true);
return 0;
out:
spin_unlock_bh(&wdev->mgmt_registrations_lock);
return err;
}
void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid)
{
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
struct cfg80211_mgmt_registration *reg, *tmp;
spin_lock_bh(&wdev->mgmt_registrations_lock);
list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
if (reg->nlportid != nlportid)
continue;
list_del(®->list);
spin_lock(&rdev->mlme_unreg_lock);
list_add_tail(®->list, &rdev->mlme_unreg);
spin_unlock(&rdev->mlme_unreg_lock);
schedule_work(&rdev->mlme_unreg_wk);
}
spin_unlock_bh(&wdev->mgmt_registrations_lock);
if (nlportid && rdev->crit_proto_nlportid == nlportid) {
rdev->crit_proto_nlportid = 0;
rdev_crit_proto_stop(rdev, wdev);
}
if (nlportid == wdev->ap_unexpected_nlportid)
wdev->ap_unexpected_nlportid = 0;
}
void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
spin_lock_bh(&wdev->mgmt_registrations_lock);
spin_lock(&rdev->mlme_unreg_lock);
list_splice_tail_init(&wdev->mgmt_registrations, &rdev->mlme_unreg);
spin_unlock(&rdev->mlme_unreg_lock);
spin_unlock_bh(&wdev->mgmt_registrations_lock);
cfg80211_process_mlme_unregistrations(rdev);
}
int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev,
struct cfg80211_mgmt_tx_params *params, u64 *cookie)
{
const struct ieee80211_mgmt *mgmt;
u16 stype;
if (!wdev->wiphy->mgmt_stypes)
return -EOPNOTSUPP;
if (!rdev->ops->mgmt_tx)
return -EOPNOTSUPP;
if (params->len < 24 + 1)
return -EINVAL;
mgmt = (const struct ieee80211_mgmt *)params->buf;
if (!ieee80211_is_mgmt(mgmt->frame_control))
return -EINVAL;
stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4)))
return -EINVAL;
if (ieee80211_is_action(mgmt->frame_control) &&
mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
int err = 0;
wdev_lock(wdev);
switch (wdev->iftype) {
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_P2P_CLIENT:
if (!wdev->current_bss) {
err = -ENOTCONN;
break;
}
if (!ether_addr_equal(wdev->current_bss->pub.bssid,
mgmt->bssid)) {
err = -ENOTCONN;
break;
}
/*
* check for IBSS DA must be done by driver as
* cfg80211 doesn't track the stations
*/
if (wdev->iftype == NL80211_IFTYPE_ADHOC)
break;
/* for station, check that DA is the AP */
if (!ether_addr_equal(wdev->current_bss->pub.bssid,
mgmt->da)) {
err = -ENOTCONN;
break;
}
break;
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_P2P_GO:
case NL80211_IFTYPE_AP_VLAN:
if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev)))
err = -EINVAL;
break;
case NL80211_IFTYPE_MESH_POINT:
if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) {
err = -EINVAL;
break;
}
/*
* check for mesh DA must be done by driver as
* cfg80211 doesn't track the stations
*/
break;
case NL80211_IFTYPE_P2P_DEVICE:
/*
* fall through, P2P device only supports
* public action frames
*/
default:
err = -EOPNOTSUPP;
break;
}
wdev_unlock(wdev);
if (err)
return err;
}
if (!ether_addr_equal(mgmt->sa, wdev_address(wdev)))
return -EINVAL;
/* Transmit the Action frame as requested by user space */
return rdev_mgmt_tx(rdev, wdev, params, cookie);
}
bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm,
const u8 *buf, size_t len, u32 flags)
{
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
struct cfg80211_mgmt_registration *reg;
const struct ieee80211_txrx_stypes *stypes =
&wiphy->mgmt_stypes[wdev->iftype];
struct ieee80211_mgmt *mgmt = (void *)buf;
const u8 *data;
int data_len;
bool result = false;
__le16 ftype = mgmt->frame_control &
cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE);
u16 stype;
trace_cfg80211_rx_mgmt(wdev, freq, sig_mbm);
stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
if (!(stypes->rx & BIT(stype))) {
trace_cfg80211_return_bool(false);
return false;
}
data = buf + ieee80211_hdrlen(mgmt->frame_control);
data_len = len - ieee80211_hdrlen(mgmt->frame_control);
spin_lock_bh(&wdev->mgmt_registrations_lock);
list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
if (reg->frame_type != ftype)
continue;
if (reg->match_len > data_len)
continue;
if (memcmp(reg->match, data, reg->match_len))
continue;
/* found match! */
/* Indicate the received Action frame to user space */
if (nl80211_send_mgmt(rdev, wdev, reg->nlportid,
freq, sig_mbm,
buf, len, flags, GFP_ATOMIC))
continue;
result = true;
break;
}
spin_unlock_bh(&wdev->mgmt_registrations_lock);
trace_cfg80211_return_bool(result);
return result;
}
EXPORT_SYMBOL(cfg80211_rx_mgmt);
void cfg80211_dfs_channels_update_work(struct work_struct *work)
{
struct delayed_work *delayed_work;
struct cfg80211_registered_device *rdev;
struct cfg80211_chan_def chandef;
struct ieee80211_supported_band *sband;
struct ieee80211_channel *c;
struct wiphy *wiphy;
bool check_again = false;
unsigned long timeout, next_time = 0;
int bandid, i;
delayed_work = container_of(work, struct delayed_work, work);
rdev = container_of(delayed_work, struct cfg80211_registered_device,
dfs_update_channels_wk);
wiphy = &rdev->wiphy;
rtnl_lock();
for (bandid = 0; bandid < IEEE80211_NUM_BANDS; bandid++) {
sband = wiphy->bands[bandid];
if (!sband)
continue;
for (i = 0; i < sband->n_channels; i++) {
c = &sband->channels[i];
if (c->dfs_state != NL80211_DFS_UNAVAILABLE)
continue;
timeout = c->dfs_state_entered + msecs_to_jiffies(
IEEE80211_DFS_MIN_NOP_TIME_MS);
if (time_after_eq(jiffies, timeout)) {
c->dfs_state = NL80211_DFS_USABLE;
c->dfs_state_entered = jiffies;
cfg80211_chandef_create(&chandef, c,
NL80211_CHAN_NO_HT);
nl80211_radar_notify(rdev, &chandef,
NL80211_RADAR_NOP_FINISHED,
NULL, GFP_ATOMIC);
continue;
}
if (!check_again)
next_time = timeout - jiffies;
else
next_time = min(next_time, timeout - jiffies);
check_again = true;
}
}
rtnl_unlock();
/* reschedule if there are other channels waiting to be cleared again */
if (check_again)
queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
next_time);
}
void cfg80211_radar_event(struct wiphy *wiphy,
struct cfg80211_chan_def *chandef,
gfp_t gfp)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
unsigned long timeout;
trace_cfg80211_radar_event(wiphy, chandef);
/* only set the chandef supplied channel to unavailable, in
* case the radar is detected on only one of multiple channels
* spanned by the chandef.
*/
cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
timeout = msecs_to_jiffies(IEEE80211_DFS_MIN_NOP_TIME_MS);
queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
timeout);
nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp);
}
EXPORT_SYMBOL(cfg80211_radar_event);
void cfg80211_cac_event(struct net_device *netdev,
const struct cfg80211_chan_def *chandef,
enum nl80211_radar_event event, gfp_t gfp)
{
struct wireless_dev *wdev = netdev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
unsigned long timeout;
trace_cfg80211_cac_event(netdev, event);
if (WARN_ON(!wdev->cac_started))
return;
if (WARN_ON(!wdev->chandef.chan))
return;
switch (event) {
case NL80211_RADAR_CAC_FINISHED:
timeout = wdev->cac_start_time +
msecs_to_jiffies(wdev->cac_time_ms);
WARN_ON(!time_after_eq(jiffies, timeout));
cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE);
break;
case NL80211_RADAR_CAC_ABORTED:
break;
default:
WARN_ON(1);
return;
}
wdev->cac_started = false;
nl80211_radar_notify(rdev, chandef, event, netdev, gfp);
}
EXPORT_SYMBOL(cfg80211_cac_event);