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linux/net/wireless/sme.c
Tejun Heo 5a0e3ad6af 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>
2010-03-30 22:02:32 +09:00

1001 lines
26 KiB
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Raw Blame History

/*
* SME code for cfg80211's connect emulation.
*
* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
* Copyright (C) 2009 Intel Corporation. All rights reserved.
*/
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/wireless.h>
#include <net/iw_handler.h>
#include <net/cfg80211.h>
#include <net/rtnetlink.h>
#include "nl80211.h"
#include "reg.h"
struct cfg80211_conn {
struct cfg80211_connect_params params;
/* these are sub-states of the _CONNECTING sme_state */
enum {
CFG80211_CONN_IDLE,
CFG80211_CONN_SCANNING,
CFG80211_CONN_SCAN_AGAIN,
CFG80211_CONN_AUTHENTICATE_NEXT,
CFG80211_CONN_AUTHENTICATING,
CFG80211_CONN_ASSOCIATE_NEXT,
CFG80211_CONN_ASSOCIATING,
CFG80211_CONN_DEAUTH_ASSOC_FAIL,
} state;
u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
u8 *ie;
size_t ie_len;
bool auto_auth, prev_bssid_valid;
};
bool cfg80211_is_all_idle(void)
{
struct cfg80211_registered_device *rdev;
struct wireless_dev *wdev;
bool is_all_idle = true;
mutex_lock(&cfg80211_mutex);
/*
* All devices must be idle as otherwise if you are actively
* scanning some new beacon hints could be learned and would
* count as new regulatory hints.
*/
list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
cfg80211_lock_rdev(rdev);
list_for_each_entry(wdev, &rdev->netdev_list, list) {
wdev_lock(wdev);
if (wdev->sme_state != CFG80211_SME_IDLE)
is_all_idle = false;
wdev_unlock(wdev);
}
cfg80211_unlock_rdev(rdev);
}
mutex_unlock(&cfg80211_mutex);
return is_all_idle;
}
static void disconnect_work(struct work_struct *work)
{
if (!cfg80211_is_all_idle())
return;
regulatory_hint_disconnect();
}
static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
static int cfg80211_conn_scan(struct wireless_dev *wdev)
{
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
struct cfg80211_scan_request *request;
int n_channels, err;
ASSERT_RTNL();
ASSERT_RDEV_LOCK(rdev);
ASSERT_WDEV_LOCK(wdev);
if (rdev->scan_req)
return -EBUSY;
if (wdev->conn->params.channel) {
n_channels = 1;
} else {
enum ieee80211_band band;
n_channels = 0;
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
if (!wdev->wiphy->bands[band])
continue;
n_channels += wdev->wiphy->bands[band]->n_channels;
}
}
request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
sizeof(request->channels[0]) * n_channels,
GFP_KERNEL);
if (!request)
return -ENOMEM;
if (wdev->conn->params.channel)
request->channels[0] = wdev->conn->params.channel;
else {
int i = 0, j;
enum ieee80211_band band;
for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
if (!wdev->wiphy->bands[band])
continue;
for (j = 0; j < wdev->wiphy->bands[band]->n_channels;
i++, j++)
request->channels[i] =
&wdev->wiphy->bands[band]->channels[j];
}
}
request->n_channels = n_channels;
request->ssids = (void *)&request->channels[n_channels];
request->n_ssids = 1;
memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
wdev->conn->params.ssid_len);
request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
request->dev = wdev->netdev;
request->wiphy = &rdev->wiphy;
rdev->scan_req = request;
err = rdev->ops->scan(wdev->wiphy, wdev->netdev, request);
if (!err) {
wdev->conn->state = CFG80211_CONN_SCANNING;
nl80211_send_scan_start(rdev, wdev->netdev);
dev_hold(wdev->netdev);
} else {
rdev->scan_req = NULL;
kfree(request);
}
return err;
}
static int cfg80211_conn_do_work(struct wireless_dev *wdev)
{
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
struct cfg80211_connect_params *params;
const u8 *prev_bssid = NULL;
int err;
ASSERT_WDEV_LOCK(wdev);
if (!wdev->conn)
return 0;
params = &wdev->conn->params;
switch (wdev->conn->state) {
case CFG80211_CONN_SCAN_AGAIN:
return cfg80211_conn_scan(wdev);
case CFG80211_CONN_AUTHENTICATE_NEXT:
BUG_ON(!rdev->ops->auth);
wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
return __cfg80211_mlme_auth(rdev, wdev->netdev,
params->channel, params->auth_type,
params->bssid,
params->ssid, params->ssid_len,
NULL, 0,
params->key, params->key_len,
params->key_idx);
case CFG80211_CONN_ASSOCIATE_NEXT:
BUG_ON(!rdev->ops->assoc);
wdev->conn->state = CFG80211_CONN_ASSOCIATING;
if (wdev->conn->prev_bssid_valid)
prev_bssid = wdev->conn->prev_bssid;
err = __cfg80211_mlme_assoc(rdev, wdev->netdev,
params->channel, params->bssid,
prev_bssid,
params->ssid, params->ssid_len,
params->ie, params->ie_len,
false, &params->crypto);
if (err)
__cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
NULL, 0,
WLAN_REASON_DEAUTH_LEAVING);
return err;
case CFG80211_CONN_DEAUTH_ASSOC_FAIL:
__cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
NULL, 0,
WLAN_REASON_DEAUTH_LEAVING);
/* return an error so that we call __cfg80211_connect_result() */
return -EINVAL;
default:
return 0;
}
}
void cfg80211_conn_work(struct work_struct *work)
{
struct cfg80211_registered_device *rdev =
container_of(work, struct cfg80211_registered_device, conn_work);
struct wireless_dev *wdev;
u8 bssid_buf[ETH_ALEN], *bssid = NULL;
rtnl_lock();
cfg80211_lock_rdev(rdev);
mutex_lock(&rdev->devlist_mtx);
list_for_each_entry(wdev, &rdev->netdev_list, list) {
wdev_lock(wdev);
if (!netif_running(wdev->netdev)) {
wdev_unlock(wdev);
continue;
}
if (wdev->sme_state != CFG80211_SME_CONNECTING) {
wdev_unlock(wdev);
continue;
}
if (wdev->conn->params.bssid) {
memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
bssid = bssid_buf;
}
if (cfg80211_conn_do_work(wdev))
__cfg80211_connect_result(
wdev->netdev, bssid,
NULL, 0, NULL, 0,
WLAN_STATUS_UNSPECIFIED_FAILURE,
false, NULL);
wdev_unlock(wdev);
}
mutex_unlock(&rdev->devlist_mtx);
cfg80211_unlock_rdev(rdev);
rtnl_unlock();
}
static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
{
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
struct cfg80211_bss *bss;
u16 capa = WLAN_CAPABILITY_ESS;
ASSERT_WDEV_LOCK(wdev);
if (wdev->conn->params.privacy)
capa |= WLAN_CAPABILITY_PRIVACY;
bss = cfg80211_get_bss(wdev->wiphy, NULL, wdev->conn->params.bssid,
wdev->conn->params.ssid,
wdev->conn->params.ssid_len,
WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY,
capa);
if (!bss)
return NULL;
memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
wdev->conn->params.bssid = wdev->conn->bssid;
wdev->conn->params.channel = bss->channel;
wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
schedule_work(&rdev->conn_work);
return bss;
}
static void __cfg80211_sme_scan_done(struct net_device *dev)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
struct cfg80211_bss *bss;
ASSERT_WDEV_LOCK(wdev);
if (wdev->sme_state != CFG80211_SME_CONNECTING)
return;
if (!wdev->conn)
return;
if (wdev->conn->state != CFG80211_CONN_SCANNING &&
wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
return;
bss = cfg80211_get_conn_bss(wdev);
if (bss) {
cfg80211_put_bss(bss);
} else {
/* not found */
if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)
schedule_work(&rdev->conn_work);
else
__cfg80211_connect_result(
wdev->netdev,
wdev->conn->params.bssid,
NULL, 0, NULL, 0,
WLAN_STATUS_UNSPECIFIED_FAILURE,
false, NULL);
}
}
void cfg80211_sme_scan_done(struct net_device *dev)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
mutex_lock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
wdev_lock(wdev);
__cfg80211_sme_scan_done(dev);
wdev_unlock(wdev);
mutex_unlock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx);
}
void cfg80211_sme_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);
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
ASSERT_WDEV_LOCK(wdev);
/* should only RX auth frames when connecting */
if (wdev->sme_state != CFG80211_SME_CONNECTING)
return;
if (WARN_ON(!wdev->conn))
return;
if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
wdev->conn->auto_auth &&
wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
/* select automatically between only open, shared, leap */
switch (wdev->conn->params.auth_type) {
case NL80211_AUTHTYPE_OPEN_SYSTEM:
if (wdev->connect_keys)
wdev->conn->params.auth_type =
NL80211_AUTHTYPE_SHARED_KEY;
else
wdev->conn->params.auth_type =
NL80211_AUTHTYPE_NETWORK_EAP;
break;
case NL80211_AUTHTYPE_SHARED_KEY:
wdev->conn->params.auth_type =
NL80211_AUTHTYPE_NETWORK_EAP;
break;
default:
/* huh? */
wdev->conn->params.auth_type =
NL80211_AUTHTYPE_OPEN_SYSTEM;
break;
}
wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
schedule_work(&rdev->conn_work);
} else if (status_code != WLAN_STATUS_SUCCESS) {
__cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
status_code, false, NULL);
} else if (wdev->sme_state == CFG80211_SME_CONNECTING &&
wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
schedule_work(&rdev->conn_work);
}
}
bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev)
{
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
if (WARN_ON(!wdev->conn))
return false;
if (!wdev->conn->prev_bssid_valid)
return false;
/*
* Some stupid APs don't accept reassoc, so we
* need to fall back to trying regular assoc.
*/
wdev->conn->prev_bssid_valid = false;
wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
schedule_work(&rdev->conn_work);
return true;
}
void cfg80211_sme_failed_assoc(struct wireless_dev *wdev)
{
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL;
schedule_work(&rdev->conn_work);
}
void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
const u8 *req_ie, size_t req_ie_len,
const u8 *resp_ie, size_t resp_ie_len,
u16 status, bool wextev,
struct cfg80211_bss *bss)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
u8 *country_ie;
#ifdef CONFIG_CFG80211_WEXT
union iwreq_data wrqu;
#endif
ASSERT_WDEV_LOCK(wdev);
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
return;
if (wdev->sme_state != CFG80211_SME_CONNECTING)
return;
nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev,
bssid, req_ie, req_ie_len,
resp_ie, resp_ie_len,
status, GFP_KERNEL);
#ifdef CONFIG_CFG80211_WEXT
if (wextev) {
if (req_ie && status == WLAN_STATUS_SUCCESS) {
memset(&wrqu, 0, sizeof(wrqu));
wrqu.data.length = req_ie_len;
wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie);
}
if (resp_ie && status == WLAN_STATUS_SUCCESS) {
memset(&wrqu, 0, sizeof(wrqu));
wrqu.data.length = resp_ie_len;
wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie);
}
memset(&wrqu, 0, sizeof(wrqu));
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
if (bssid && status == WLAN_STATUS_SUCCESS) {
memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
wdev->wext.prev_bssid_valid = true;
}
wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
}
#endif
if (wdev->current_bss) {
cfg80211_unhold_bss(wdev->current_bss);
cfg80211_put_bss(&wdev->current_bss->pub);
wdev->current_bss = NULL;
}
if (wdev->conn)
wdev->conn->state = CFG80211_CONN_IDLE;
if (status != WLAN_STATUS_SUCCESS) {
wdev->sme_state = CFG80211_SME_IDLE;
if (wdev->conn)
kfree(wdev->conn->ie);
kfree(wdev->conn);
wdev->conn = NULL;
kfree(wdev->connect_keys);
wdev->connect_keys = NULL;
wdev->ssid_len = 0;
return;
}
if (!bss)
bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
wdev->ssid, wdev->ssid_len,
WLAN_CAPABILITY_ESS,
WLAN_CAPABILITY_ESS);
if (WARN_ON(!bss))
return;
cfg80211_hold_bss(bss_from_pub(bss));
wdev->current_bss = bss_from_pub(bss);
wdev->sme_state = CFG80211_SME_CONNECTED;
cfg80211_upload_connect_keys(wdev);
country_ie = (u8 *) ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY);
if (!country_ie)
return;
/*
* ieee80211_bss_get_ie() ensures we can access:
* - country_ie + 2, the start of the country ie data, and
* - and country_ie[1] which is the IE length
*/
regulatory_hint_11d(wdev->wiphy,
bss->channel->band,
country_ie + 2,
country_ie[1]);
}
void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
const u8 *req_ie, size_t req_ie_len,
const u8 *resp_ie, size_t resp_ie_len,
u16 status, gfp_t gfp)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
struct cfg80211_event *ev;
unsigned long flags;
CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING);
ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
if (!ev)
return;
ev->type = EVENT_CONNECT_RESULT;
if (bssid)
memcpy(ev->cr.bssid, bssid, ETH_ALEN);
ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev);
ev->cr.req_ie_len = req_ie_len;
memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len);
ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
ev->cr.resp_ie_len = resp_ie_len;
memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len);
ev->cr.status = status;
spin_lock_irqsave(&wdev->event_lock, flags);
list_add_tail(&ev->list, &wdev->event_list);
spin_unlock_irqrestore(&wdev->event_lock, flags);
queue_work(cfg80211_wq, &rdev->event_work);
}
EXPORT_SYMBOL(cfg80211_connect_result);
void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
const u8 *req_ie, size_t req_ie_len,
const u8 *resp_ie, size_t resp_ie_len)
{
struct cfg80211_bss *bss;
#ifdef CONFIG_CFG80211_WEXT
union iwreq_data wrqu;
#endif
ASSERT_WDEV_LOCK(wdev);
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
return;
if (wdev->sme_state != CFG80211_SME_CONNECTED)
return;
/* internal error -- how did we get to CONNECTED w/o BSS? */
if (WARN_ON(!wdev->current_bss)) {
return;
}
cfg80211_unhold_bss(wdev->current_bss);
cfg80211_put_bss(&wdev->current_bss->pub);
wdev->current_bss = NULL;
bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
wdev->ssid, wdev->ssid_len,
WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
if (WARN_ON(!bss))
return;
cfg80211_hold_bss(bss_from_pub(bss));
wdev->current_bss = bss_from_pub(bss);
nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bssid,
req_ie, req_ie_len, resp_ie, resp_ie_len,
GFP_KERNEL);
#ifdef CONFIG_CFG80211_WEXT
if (req_ie) {
memset(&wrqu, 0, sizeof(wrqu));
wrqu.data.length = req_ie_len;
wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
&wrqu, req_ie);
}
if (resp_ie) {
memset(&wrqu, 0, sizeof(wrqu));
wrqu.data.length = resp_ie_len;
wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
&wrqu, resp_ie);
}
memset(&wrqu, 0, sizeof(wrqu));
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN);
wdev->wext.prev_bssid_valid = true;
wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
#endif
}
void cfg80211_roamed(struct net_device *dev, const u8 *bssid,
const u8 *req_ie, size_t req_ie_len,
const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
struct cfg80211_event *ev;
unsigned long flags;
CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
if (!ev)
return;
ev->type = EVENT_ROAMED;
memcpy(ev->rm.bssid, bssid, ETH_ALEN);
ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
ev->rm.req_ie_len = req_ie_len;
memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len);
ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len;
ev->rm.resp_ie_len = resp_ie_len;
memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len);
spin_lock_irqsave(&wdev->event_lock, flags);
list_add_tail(&ev->list, &wdev->event_list);
spin_unlock_irqrestore(&wdev->event_lock, flags);
queue_work(cfg80211_wq, &rdev->event_work);
}
EXPORT_SYMBOL(cfg80211_roamed);
void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
size_t ie_len, u16 reason, bool from_ap)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
int i;
#ifdef CONFIG_CFG80211_WEXT
union iwreq_data wrqu;
#endif
ASSERT_WDEV_LOCK(wdev);
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
return;
if (wdev->sme_state != CFG80211_SME_CONNECTED)
return;
if (wdev->current_bss) {
cfg80211_unhold_bss(wdev->current_bss);
cfg80211_put_bss(&wdev->current_bss->pub);
}
wdev->current_bss = NULL;
wdev->sme_state = CFG80211_SME_IDLE;
wdev->ssid_len = 0;
if (wdev->conn) {
const u8 *bssid;
int ret;
kfree(wdev->conn->ie);
wdev->conn->ie = NULL;
kfree(wdev->conn);
wdev->conn = NULL;
/*
* If this disconnect was due to a disassoc, we
* we might still have an auth BSS around. For
* the userspace SME that's currently expected,
* but for the kernel SME (nl80211 CONNECT or
* wireless extensions) we want to clear up all
* state.
*/
for (i = 0; i < MAX_AUTH_BSSES; i++) {
if (!wdev->auth_bsses[i])
continue;
bssid = wdev->auth_bsses[i]->pub.bssid;
ret = __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
WLAN_REASON_DEAUTH_LEAVING);
WARN(ret, "deauth failed: %d\n", ret);
}
}
nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
/*
* Delete all the keys ... pairwise keys can't really
* exist any more anyway, but default keys might.
*/
if (rdev->ops->del_key)
for (i = 0; i < 6; i++)
rdev->ops->del_key(wdev->wiphy, dev, i, NULL);
#ifdef CONFIG_CFG80211_WEXT
memset(&wrqu, 0, sizeof(wrqu));
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
wdev->wext.connect.ssid_len = 0;
#endif
schedule_work(&cfg80211_disconnect_work);
}
void cfg80211_disconnected(struct net_device *dev, u16 reason,
u8 *ie, size_t ie_len, gfp_t gfp)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
struct cfg80211_event *ev;
unsigned long flags;
CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED);
ev = kzalloc(sizeof(*ev) + ie_len, gfp);
if (!ev)
return;
ev->type = EVENT_DISCONNECTED;
ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
ev->dc.ie_len = ie_len;
memcpy((void *)ev->dc.ie, ie, ie_len);
ev->dc.reason = reason;
spin_lock_irqsave(&wdev->event_lock, flags);
list_add_tail(&ev->list, &wdev->event_list);
spin_unlock_irqrestore(&wdev->event_lock, flags);
queue_work(cfg80211_wq, &rdev->event_work);
}
EXPORT_SYMBOL(cfg80211_disconnected);
int __cfg80211_connect(struct cfg80211_registered_device *rdev,
struct net_device *dev,
struct cfg80211_connect_params *connect,
struct cfg80211_cached_keys *connkeys,
const u8 *prev_bssid)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct ieee80211_channel *chan;
struct cfg80211_bss *bss = NULL;
int err;
ASSERT_WDEV_LOCK(wdev);
if (wdev->sme_state != CFG80211_SME_IDLE)
return -EALREADY;
chan = rdev_fixed_channel(rdev, wdev);
if (chan && chan != connect->channel)
return -EBUSY;
if (WARN_ON(wdev->connect_keys)) {
kfree(wdev->connect_keys);
wdev->connect_keys = NULL;
}
if (connkeys && connkeys->def >= 0) {
int idx;
u32 cipher;
idx = connkeys->def;
cipher = connkeys->params[idx].cipher;
/* If given a WEP key we may need it for shared key auth */
if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
cipher == WLAN_CIPHER_SUITE_WEP104) {
connect->key_idx = idx;
connect->key = connkeys->params[idx].key;
connect->key_len = connkeys->params[idx].key_len;
/*
* If ciphers are not set (e.g. when going through
* iwconfig), we have to set them appropriately here.
*/
if (connect->crypto.cipher_group == 0)
connect->crypto.cipher_group = cipher;
if (connect->crypto.n_ciphers_pairwise == 0) {
connect->crypto.n_ciphers_pairwise = 1;
connect->crypto.ciphers_pairwise[0] = cipher;
}
}
}
if (!rdev->ops->connect) {
if (!rdev->ops->auth || !rdev->ops->assoc)
return -EOPNOTSUPP;
if (WARN_ON(wdev->conn))
return -EINPROGRESS;
wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
if (!wdev->conn)
return -ENOMEM;
/*
* Copy all parameters, and treat explicitly IEs, BSSID, SSID.
*/
memcpy(&wdev->conn->params, connect, sizeof(*connect));
if (connect->bssid) {
wdev->conn->params.bssid = wdev->conn->bssid;
memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
}
if (connect->ie) {
wdev->conn->ie = kmemdup(connect->ie, connect->ie_len,
GFP_KERNEL);
wdev->conn->params.ie = wdev->conn->ie;
if (!wdev->conn->ie) {
kfree(wdev->conn);
wdev->conn = NULL;
return -ENOMEM;
}
}
if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
wdev->conn->auto_auth = true;
/* start with open system ... should mostly work */
wdev->conn->params.auth_type =
NL80211_AUTHTYPE_OPEN_SYSTEM;
} else {
wdev->conn->auto_auth = false;
}
memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
wdev->ssid_len = connect->ssid_len;
wdev->conn->params.ssid = wdev->ssid;
wdev->conn->params.ssid_len = connect->ssid_len;
/* see if we have the bss already */
bss = cfg80211_get_conn_bss(wdev);
wdev->sme_state = CFG80211_SME_CONNECTING;
wdev->connect_keys = connkeys;
if (prev_bssid) {
memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
wdev->conn->prev_bssid_valid = true;
}
/* we're good if we have a matching bss struct */
if (bss) {
wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
err = cfg80211_conn_do_work(wdev);
cfg80211_put_bss(bss);
} else {
/* otherwise we'll need to scan for the AP first */
err = cfg80211_conn_scan(wdev);
/*
* If we can't scan right now, then we need to scan again
* after the current scan finished, since the parameters
* changed (unless we find a good AP anyway).
*/
if (err == -EBUSY) {
err = 0;
wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
}
}
if (err) {
kfree(wdev->conn->ie);
kfree(wdev->conn);
wdev->conn = NULL;
wdev->sme_state = CFG80211_SME_IDLE;
wdev->connect_keys = NULL;
wdev->ssid_len = 0;
}
return err;
} else {
wdev->sme_state = CFG80211_SME_CONNECTING;
wdev->connect_keys = connkeys;
err = rdev->ops->connect(&rdev->wiphy, dev, connect);
if (err) {
wdev->connect_keys = NULL;
wdev->sme_state = CFG80211_SME_IDLE;
return err;
}
memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
wdev->ssid_len = connect->ssid_len;
return 0;
}
}
int cfg80211_connect(struct cfg80211_registered_device *rdev,
struct net_device *dev,
struct cfg80211_connect_params *connect,
struct cfg80211_cached_keys *connkeys)
{
int err;
mutex_lock(&rdev->devlist_mtx);
wdev_lock(dev->ieee80211_ptr);
err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL);
wdev_unlock(dev->ieee80211_ptr);
mutex_unlock(&rdev->devlist_mtx);
return err;
}
int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
struct net_device *dev, u16 reason, bool wextev)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
int err;
ASSERT_WDEV_LOCK(wdev);
if (wdev->sme_state == CFG80211_SME_IDLE)
return -EINVAL;
kfree(wdev->connect_keys);
wdev->connect_keys = NULL;
if (!rdev->ops->disconnect) {
if (!rdev->ops->deauth)
return -EOPNOTSUPP;
/* was it connected by userspace SME? */
if (!wdev->conn) {
cfg80211_mlme_down(rdev, dev);
return 0;
}
if (wdev->sme_state == CFG80211_SME_CONNECTING &&
(wdev->conn->state == CFG80211_CONN_SCANNING ||
wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) {
wdev->sme_state = CFG80211_SME_IDLE;
kfree(wdev->conn->ie);
kfree(wdev->conn);
wdev->conn = NULL;
wdev->ssid_len = 0;
return 0;
}
/* wdev->conn->params.bssid must be set if > SCANNING */
err = __cfg80211_mlme_deauth(rdev, dev,
wdev->conn->params.bssid,
NULL, 0, reason);
if (err)
return err;
} else {
err = rdev->ops->disconnect(&rdev->wiphy, dev, reason);
if (err)
return err;
}
if (wdev->sme_state == CFG80211_SME_CONNECTED)
__cfg80211_disconnected(dev, NULL, 0, 0, false);
else if (wdev->sme_state == CFG80211_SME_CONNECTING)
__cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0,
WLAN_STATUS_UNSPECIFIED_FAILURE,
wextev, NULL);
return 0;
}
int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
struct net_device *dev,
u16 reason, bool wextev)
{
int err;
wdev_lock(dev->ieee80211_ptr);
err = __cfg80211_disconnect(rdev, dev, reason, wextev);
wdev_unlock(dev->ieee80211_ptr);
return err;
}
void cfg80211_sme_disassoc(struct net_device *dev, int idx)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
u8 bssid[ETH_ALEN];
ASSERT_WDEV_LOCK(wdev);
if (!wdev->conn)
return;
if (wdev->conn->state == CFG80211_CONN_IDLE)
return;
/*
* Ok, so the association was made by this SME -- we don't
* want it any more so deauthenticate too.
*/
if (!wdev->auth_bsses[idx])
return;
memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN);
if (__cfg80211_mlme_deauth(rdev, dev, bssid,
NULL, 0, WLAN_REASON_DEAUTH_LEAVING)) {
/* whatever -- assume gone anyway */
cfg80211_unhold_bss(wdev->auth_bsses[idx]);
cfg80211_put_bss(&wdev->auth_bsses[idx]->pub);
wdev->auth_bsses[idx] = NULL;
}
}
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