linux/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 cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
#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)
{
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);
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);
/* 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_dev(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_dev(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_dev(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_dev(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_dev(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_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 = {
.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,
WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
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;
}
/* 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,
WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
if (!req->bss)
return -ENOENT;
err = cfg80211_can_use_chan(rdev, wdev, chan, CHAN_MODE_SHARED);
if (err)
goto out;
err = rdev_assoc(rdev, dev, req);
if (!err)
cfg80211_hold_bss(bss_from_pub(req->bss));
out:
if (err)
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;
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 && 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_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, u32 flags, 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, flags, 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_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 +
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;
}
}
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_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);