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OpenCloudOS-Kernel/net/wireless/mlme.c

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/*
* cfg80211 MLME SAP interface
*
* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
*/
#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_send_rx_auth(struct net_device *dev, const u8 *buf, size_t len)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
trace_cfg80211_send_rx_auth(dev);
wdev_lock(wdev);
nl80211_send_rx_auth(rdev, dev, buf, len, GFP_KERNEL);
cfg80211_sme_rx_auth(dev, buf, len);
wdev_unlock(wdev);
}
EXPORT_SYMBOL(cfg80211_send_rx_auth);
void cfg80211_send_rx_assoc(struct net_device *dev, struct cfg80211_bss *bss,
const u8 *buf, size_t len)
{
u16 status_code;
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(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);
trace_cfg80211_send_rx_assoc(dev, bss);
wdev_lock(wdev);
status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
/*
* 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 (status_code != WLAN_STATUS_SUCCESS && wdev->conn &&
cfg80211_sme_failed_reassoc(wdev)) {
cfg80211_put_bss(wiphy, bss);
goto out;
}
nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL);
if (status_code != WLAN_STATUS_SUCCESS && wdev->conn) {
cfg80211_sme_failed_assoc(wdev);
/*
* do not call connect_result() now because the
* sme will schedule work that does it later.
*/
cfg80211_put_bss(wiphy, bss);
goto out;
}
if (!wdev->conn && wdev->sme_state == CFG80211_SME_IDLE) {
/*
* This is for the userspace SME, the CONNECTING
* state will be changed to CONNECTED by
* __cfg80211_connect_result() below.
*/
wdev->sme_state = CFG80211_SME_CONNECTING;
}
/* this consumes the bss reference */
__cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
status_code,
status_code == WLAN_STATUS_SUCCESS, bss);
out:
wdev_unlock(wdev);
}
EXPORT_SYMBOL(cfg80211_send_rx_assoc);
void __cfg80211_send_deauth(struct net_device *dev,
const u8 *buf, size_t len)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
const u8 *bssid = mgmt->bssid;
bool was_current = false;
trace___cfg80211_send_deauth(dev);
ASSERT_WDEV_LOCK(wdev);
if (wdev->current_bss &&
ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) {
cfg80211_unhold_bss(wdev->current_bss);
cfg80211_put_bss(wiphy, &wdev->current_bss->pub);
wdev->current_bss = NULL;
was_current = true;
}
nl80211_send_deauth(rdev, dev, buf, len, GFP_KERNEL);
if (wdev->sme_state == CFG80211_SME_CONNECTED && was_current) {
u16 reason_code;
bool from_ap;
reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
from_ap = !ether_addr_equal(mgmt->sa, dev->dev_addr);
__cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
} else if (wdev->sme_state == CFG80211_SME_CONNECTING) {
__cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
WLAN_STATUS_UNSPECIFIED_FAILURE,
false, NULL);
}
}
EXPORT_SYMBOL(__cfg80211_send_deauth);
void cfg80211_send_deauth(struct net_device *dev, const u8 *buf, size_t len)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
wdev_lock(wdev);
__cfg80211_send_deauth(dev, buf, len);
wdev_unlock(wdev);
}
EXPORT_SYMBOL(cfg80211_send_deauth);
void __cfg80211_send_disassoc(struct net_device *dev,
const u8 *buf, size_t len)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
const u8 *bssid = mgmt->bssid;
u16 reason_code;
bool from_ap;
trace___cfg80211_send_disassoc(dev);
ASSERT_WDEV_LOCK(wdev);
nl80211_send_disassoc(rdev, dev, buf, len, GFP_KERNEL);
if (wdev->sme_state != CFG80211_SME_CONNECTED)
return;
if (wdev->current_bss &&
ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) {
cfg80211_sme_disassoc(dev, wdev->current_bss);
cfg80211_unhold_bss(wdev->current_bss);
cfg80211_put_bss(wiphy, &wdev->current_bss->pub);
wdev->current_bss = NULL;
} else
WARN_ON(1);
reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
from_ap = !ether_addr_equal(mgmt->sa, dev->dev_addr);
__cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
}
EXPORT_SYMBOL(__cfg80211_send_disassoc);
void cfg80211_send_disassoc(struct net_device *dev, const u8 *buf, size_t len)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
wdev_lock(wdev);
__cfg80211_send_disassoc(dev, buf, len);
wdev_unlock(wdev);
}
EXPORT_SYMBOL(cfg80211_send_disassoc);
void cfg80211_send_unprot_deauth(struct net_device *dev, const u8 *buf,
size_t len)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
trace_cfg80211_send_unprot_deauth(dev);
nl80211_send_unprot_deauth(rdev, dev, buf, len, GFP_ATOMIC);
}
EXPORT_SYMBOL(cfg80211_send_unprot_deauth);
void cfg80211_send_unprot_disassoc(struct net_device *dev, const u8 *buf,
size_t len)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
trace_cfg80211_send_unprot_disassoc(dev);
nl80211_send_unprot_disassoc(rdev, dev, buf, len, GFP_ATOMIC);
}
EXPORT_SYMBOL(cfg80211_send_unprot_disassoc);
void cfg80211_send_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_dev(wiphy);
trace_cfg80211_send_auth_timeout(dev, addr);
wdev_lock(wdev);
nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
if (wdev->sme_state == CFG80211_SME_CONNECTING)
__cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
WLAN_STATUS_UNSPECIFIED_FAILURE,
false, NULL);
wdev_unlock(wdev);
}
EXPORT_SYMBOL(cfg80211_send_auth_timeout);
void cfg80211_send_assoc_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_dev(wiphy);
trace_cfg80211_send_assoc_timeout(dev, addr);
wdev_lock(wdev);
nl80211_send_assoc_timeout(rdev, dev, addr, GFP_KERNEL);
if (wdev->sme_state == CFG80211_SME_CONNECTING)
__cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
WLAN_STATUS_UNSPECIFIED_FAILURE,
false, NULL);
wdev_unlock(wdev);
}
EXPORT_SYMBOL(cfg80211_send_assoc_timeout);
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_dev(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;
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;
memset(&req, 0, sizeof(req));
req.ie = ie;
req.ie_len = ie_len;
req.sae_data = sae_data;
req.sae_data_len = sae_data_len;
req.auth_type = auth_type;
req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
req.key = key;
req.key_len = key_len;
req.key_idx = key_idx;
if (!req.bss)
return -ENOENT;
err = cfg80211_can_use_chan(rdev, wdev, req.bss->channel,
CHAN_MODE_SHARED);
if (err)
goto out;
err = rdev_auth(rdev, dev, &req);
out:
cfg80211_put_bss(&rdev->wiphy, req.bss);
return err;
}
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)
{
int err;
mutex_lock(&rdev->devlist_mtx);
wdev_lock(dev->ieee80211_ptr);
err = __cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
ssid, ssid_len, ie, ie_len,
key, key_len, key_idx,
sae_data, sae_data_len);
wdev_unlock(dev->ieee80211_ptr);
mutex_unlock(&rdev->devlist_mtx);
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];
}
int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
struct net_device *dev,
struct ieee80211_channel *chan,
const u8 *bssid, const u8 *prev_bssid,
const u8 *ssid, int ssid_len,
const u8 *ie, int ie_len, bool use_mfp,
struct cfg80211_crypto_settings *crypt,
u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
struct ieee80211_ht_cap *ht_capa_mask)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_assoc_request req;
int err;
bool was_connected = false;
ASSERT_WDEV_LOCK(wdev);
memset(&req, 0, sizeof(req));
if (wdev->current_bss && prev_bssid &&
ether_addr_equal(wdev->current_bss->pub.bssid, prev_bssid)) {
/*
* Trying to reassociate: Allow this to proceed and let the old
* association to be dropped when the new one is completed.
*/
if (wdev->sme_state == CFG80211_SME_CONNECTED) {
was_connected = true;
wdev->sme_state = CFG80211_SME_CONNECTING;
}
} else if (wdev->current_bss)
return -EALREADY;
req.ie = ie;
req.ie_len = ie_len;
memcpy(&req.crypto, crypt, sizeof(req.crypto));
req.use_mfp = use_mfp;
req.prev_bssid = prev_bssid;
req.flags = assoc_flags;
if (ht_capa)
memcpy(&req.ht_capa, ht_capa, sizeof(req.ht_capa));
if (ht_capa_mask)
memcpy(&req.ht_capa_mask, ht_capa_mask,
sizeof(req.ht_capa_mask));
cfg80211_oper_and_ht_capa(&req.ht_capa_mask,
rdev->wiphy.ht_capa_mod_mask);
req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
if (!req.bss) {
if (was_connected)
wdev->sme_state = CFG80211_SME_CONNECTED;
return -ENOENT;
}
err = cfg80211_can_use_chan(rdev, wdev, req.bss->channel,
CHAN_MODE_SHARED);
if (err)
goto out;
err = rdev_assoc(rdev, dev, &req);
out:
if (err) {
if (was_connected)
wdev->sme_state = CFG80211_SME_CONNECTED;
cfg80211_put_bss(&rdev->wiphy, req.bss);
}
return err;
}
int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
struct net_device *dev,
struct ieee80211_channel *chan,
const u8 *bssid, const u8 *prev_bssid,
const u8 *ssid, int ssid_len,
const u8 *ie, int ie_len, bool use_mfp,
struct cfg80211_crypto_settings *crypt,
u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
struct ieee80211_ht_cap *ht_capa_mask)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
int err;
mutex_lock(&rdev->devlist_mtx);
wdev_lock(wdev);
err = __cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
ssid, ssid_len, ie, ie_len, use_mfp, crypt,
assoc_flags, ht_capa, ht_capa_mask);
wdev_unlock(wdev);
mutex_unlock(&rdev->devlist_mtx);
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_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;
int err;
wdev_lock(wdev);
err = __cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason,
local_state_change);
wdev_unlock(wdev);
return err;
}
static 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;
ASSERT_WDEV_LOCK(wdev);
if (wdev->sme_state != CFG80211_SME_CONNECTED)
return -ENOTCONN;
if (WARN(!wdev->current_bss, "sme_state=%d\n", wdev->sme_state))
return -ENOTCONN;
memset(&req, 0, sizeof(req));
req.reason_code = reason;
req.local_state_change = local_state_change;
req.ie = ie;
req.ie_len = ie_len;
if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
req.bss = &wdev->current_bss->pub;
else
return -ENOTCONN;
return rdev_disassoc(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;
int err;
wdev_lock(wdev);
err = __cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason,
local_state_change);
wdev_unlock(wdev);
return err;
}
void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
struct net_device *dev)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_deauth_request req;
u8 bssid[ETH_ALEN];
ASSERT_WDEV_LOCK(wdev);
if (!rdev->ops->deauth)
return;
memset(&req, 0, sizeof(req));
req.reason_code = WLAN_REASON_DEAUTH_LEAVING;
req.ie = NULL;
req.ie_len = 0;
if (!wdev->current_bss)
return;
memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN);
req.bssid = bssid;
rdev_deauth(rdev, dev, &req);
if (wdev->current_bss) {
cfg80211_unhold_bss(wdev->current_bss);
cfg80211_put_bss(&rdev->wiphy, &wdev->current_bss->pub);
wdev->current_bss = NULL;
}
}
void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
struct ieee80211_channel *chan,
unsigned int duration, gfp_t gfp)
{
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
nl80211_send_remain_on_channel(rdev, wdev, cookie, chan, duration, gfp);
}
EXPORT_SYMBOL(cfg80211_ready_on_channel);
void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
struct ieee80211_channel *chan,
gfp_t gfp)
{
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
nl80211_send_remain_on_channel_cancel(rdev, wdev, cookie, chan, gfp);
}
EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
struct station_info *sinfo, gfp_t gfp)
{
struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
trace_cfg80211_new_sta(dev, mac_addr, sinfo);
nl80211_send_sta_event(rdev, dev, mac_addr, sinfo, gfp);
}
EXPORT_SYMBOL(cfg80211_new_sta);
void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
{
struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
trace_cfg80211_del_sta(dev, mac_addr);
nl80211_send_sta_del_event(rdev, dev, mac_addr, gfp);
}
EXPORT_SYMBOL(cfg80211_del_sta);
void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
enum nl80211_connect_failed_reason reason,
gfp_t gfp)
{
struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
nl80211_send_conn_failed_event(rdev, dev, mac_addr, reason, gfp);
}
EXPORT_SYMBOL(cfg80211_conn_failed);
struct cfg80211_mgmt_registration {
struct list_head list;
u32 nlportid;
int match_len;
__le16 frame_type;
u8 match[];
};
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_dev(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);
list_add(&nreg->list, &wdev->mgmt_registrations);
if (rdev->ops->mgmt_frame_register)
rdev_mgmt_frame_register(rdev, wdev, frame_type, true);
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_dev(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;
if (rdev->ops->mgmt_frame_register) {
u16 frame_type = le16_to_cpu(reg->frame_type);
rdev_mgmt_frame_register(rdev, wdev,
frame_type, false);
}
list_del(&reg->list);
kfree(reg);
}
spin_unlock_bh(&wdev->mgmt_registrations_lock);
if (nlportid == wdev->ap_unexpected_nlportid)
wdev->ap_unexpected_nlportid = 0;
}
void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev)
{
struct cfg80211_mgmt_registration *reg, *tmp;
spin_lock_bh(&wdev->mgmt_registrations_lock);
list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
list_del(&reg->list);
kfree(reg);
}
spin_unlock_bh(&wdev->mgmt_registrations_lock);
}
int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev,
struct ieee80211_channel *chan, bool offchan,
unsigned int wait, const u8 *buf, size_t len,
bool no_cck, bool dont_wait_for_ack, u64 *cookie)
{
const struct ieee80211_mgmt *mgmt;
u16 stype;
if (!wdev->wiphy->mgmt_stypes)
return -EOPNOTSUPP;
if (!rdev->ops->mgmt_tx)
return -EOPNOTSUPP;
if (len < 24 + 1)
return -EINVAL;
mgmt = (const struct ieee80211_mgmt *) 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, chan, offchan,
wait, buf, len, no_cck, dont_wait_for_ack,
cookie);
}
bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm,
const u8 *buf, size_t len, gfp_t gfp)
{
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(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, gfp))
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_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
const u8 *buf, size_t len, bool ack, gfp_t gfp)
{
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
/* Indicate TX status of the Action frame to user space */
nl80211_send_mgmt_tx_status(rdev, wdev, cookie, buf, len, ack, gfp);
}
EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
void cfg80211_cqm_rssi_notify(struct net_device *dev,
enum nl80211_cqm_rssi_threshold_event rssi_event,
gfp_t gfp)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
/* Indicate roaming trigger event to user space */
nl80211_send_cqm_rssi_notify(rdev, dev, rssi_event, gfp);
}
EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
void cfg80211_cqm_pktloss_notify(struct net_device *dev,
const u8 *peer, u32 num_packets, gfp_t gfp)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
/* Indicate roaming trigger event to user space */
nl80211_send_cqm_pktloss_notify(rdev, dev, peer, num_packets, gfp);
}
EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
void cfg80211_cqm_txe_notify(struct net_device *dev,
const u8 *peer, u32 num_packets,
u32 rate, u32 intvl, gfp_t gfp)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
nl80211_send_cqm_txe_notify(rdev, dev, peer, num_packets,
rate, intvl, gfp);
}
EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
const u8 *replay_ctr, gfp_t gfp)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
trace_cfg80211_gtk_rekey_notify(dev, bssid);
nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
}
EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
const u8 *bssid, bool preauth, gfp_t gfp)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
}
EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
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;
mutex_lock(&cfg80211_mutex);
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 +
IEEE80211_DFS_MIN_NOP_TIME_MS;
if (time_after_eq(jiffies, timeout)) {
c->dfs_state = NL80211_DFS_USABLE;
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;
}
}
mutex_unlock(&cfg80211_mutex);
/* 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_dev(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,
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_dev(wiphy);
struct cfg80211_chan_def chandef;
unsigned long timeout;
trace_cfg80211_cac_event(netdev, event);
if (WARN_ON(!wdev->cac_started))
return;
if (WARN_ON(!wdev->channel))
return;
cfg80211_chandef_create(&chandef, wdev->channel, NL80211_CHAN_NO_HT);
switch (event) {
case NL80211_RADAR_CAC_FINISHED:
timeout = wdev->cac_start_time +
msecs_to_jiffies(IEEE80211_DFS_MIN_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);
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