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linux-2.6/net/wireless/sme.c
Johannes Berg 463d018323 cfg80211: make aware of net namespaces 
In order to make cfg80211/nl80211 aware of network namespaces,
we have to do the following things:

 * del_virtual_intf method takes an interface index rather
   than a netdev pointer - simply change this

 * nl80211 uses init_net a lot, it changes to use the sender's
   network namespace

 * scan requests use the interface index, hold a netdev pointer
   and reference instead

 * we want a wiphy and its associated virtual interfaces to be
   in one netns together, so
    - we need to be able to change ns for a given interface, so
      export dev_change_net_namespace()
    - for each virtual interface set the NETIF_F_NETNS_LOCAL
      flag, and clear that flag only when the wiphy changes ns,
      to disallow breaking this invariant

 * when a network namespace goes away, we need to reparent the
   wiphy to init_net

 * cfg80211 users that support creating virtual interfaces must
   create them in the wiphy's namespace, currently this affects
   only mac80211

The end result is that you can now switch an entire wiphy into
a different network namespace with the new command
	iw phy#<idx> set netns <pid>
and all virtual interfaces will follow (or the operation fails).

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-07-27 15:24:07 -04:00

838 lines
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/*
* 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/workqueue.h>
#include <net/cfg80211.h>
#include <net/rtnetlink.h>
#include "nl80211.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,
} state;
u8 bssid[ETH_ALEN];
u8 *ie;
size_t ie_len;
bool auto_auth;
};
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;
request->channels = (void *)((char *)request + sizeof(*request));
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;
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;
/*
* We could, later, implement roaming here and then actually
* set prev_bssid to non-NULL. But then we need to be aware
* that some APs don't like that -- so we'd need to retry
* the association.
*/
err = __cfg80211_mlme_assoc(rdev, wdev->netdev,
params->channel, params->bssid,
NULL,
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;
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;
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 (cfg80211_conn_do_work(wdev))
__cfg80211_connect_result(
wdev->netdev,
wdev->conn->params.bssid,
NULL, 0, NULL, 0,
WLAN_STATUS_UNSPECIFIED_FAILURE,
false);
wdev_unlock(wdev);
}
mutex_unlock(&rdev->devlist_mtx);
cfg80211_unlock_rdev(rdev);
rtnl_unlock();
}
static bool 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 false;
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);
cfg80211_put_bss(bss);
return true;
}
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);
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;
if (!cfg80211_get_conn_bss(wdev)) {
/* 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);
}
}
void cfg80211_sme_scan_done(struct net_device *dev)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
wdev_lock(wdev);
__cfg80211_sme_scan_done(dev);
wdev_unlock(wdev);
}
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);
} 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);
}
}
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 wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_bss *bss;
#ifdef CONFIG_WIRELESS_EXT
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)
nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), dev,
bssid, req_ie, req_ie_len,
resp_ie, resp_ie_len, GFP_KERNEL);
else
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_WIRELESS_EXT
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);
wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
}
#endif
if (status == WLAN_STATUS_SUCCESS &&
wdev->sme_state == CFG80211_SME_IDLE)
goto success;
if (wdev->sme_state != CFG80211_SME_CONNECTING)
return;
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;
kfree(wdev->conn);
wdev->conn = NULL;
kfree(wdev->connect_keys);
wdev->connect_keys = NULL;
return;
}
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);
success:
wdev->sme_state = CFG80211_SME_CONNECTED;
cfg80211_upload_connect_keys(wdev);
}
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;
ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp);
if (!ev)
return;
ev->type = EVENT_CONNECT_RESULT;
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);
schedule_work(&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_WIRELESS_EXT
union iwreq_data wrqu;
#endif
ASSERT_WDEV_LOCK(wdev);
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
return;
if (WARN_ON(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_WIRELESS_EXT
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);
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;
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);
schedule_work(&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_WIRELESS_EXT
union iwreq_data wrqu;
#endif
ASSERT_WDEV_LOCK(wdev);
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
return;
if (WARN_ON(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;
if (wdev->conn) {
kfree(wdev->conn->ie);
wdev->conn->ie = NULL;
kfree(wdev->conn);
wdev->conn = NULL;
}
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_WIRELESS_EXT
memset(&wrqu, 0, sizeof(wrqu));
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
#endif
}
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;
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);
schedule_work(&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)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
int err;
ASSERT_WDEV_LOCK(wdev);
if (wdev->sme_state != CFG80211_SME_IDLE)
return -EALREADY;
if (WARN_ON(wdev->connect_keys)) {
kfree(wdev->connect_keys);
wdev->connect_keys = NULL;
}
if (connkeys && connkeys->def >= 0) {
int idx;
idx = connkeys->def;
/* If given a WEP key we may need it for shared key auth */
if (connkeys->params[idx].cipher == WLAN_CIPHER_SUITE_WEP40 ||
connkeys->params[idx].cipher == WLAN_CIPHER_SUITE_WEP104) {
connect->key_idx = idx;
connect->key = connkeys->params[idx].key;
connect->key_len = connkeys->params[idx].key_len;
}
}
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;
/* don't care about result -- but fill bssid & channel */
if (!wdev->conn->params.bssid || !wdev->conn->params.channel)
cfg80211_get_conn_bss(wdev);
wdev->sme_state = CFG80211_SME_CONNECTING;
wdev->connect_keys = connkeys;
/* we're good if we have both BSSID and channel */
if (wdev->conn->params.bssid && wdev->conn->params.channel) {
wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
err = cfg80211_conn_do_work(wdev);
} 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);
wdev->conn = NULL;
wdev->sme_state = CFG80211_SME_IDLE;
wdev->connect_keys = NULL;
}
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;
wdev_lock(dev->ieee80211_ptr);
err = __cfg80211_connect(rdev, dev, connect, connkeys);
wdev_unlock(dev->ieee80211_ptr);
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);
wdev->conn = NULL;
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);
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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