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sme.c
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sme.c
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// SPDX-License-Identifier: GPL-2.0
/*
* SME code for cfg80211
* both driver SME event handling and the SME implementation
* (for nl80211's connect() and wext)
*
* Copyright 2009 Johannes Berg <[email protected]>
* Copyright (C) 2009, 2020, 2022 Intel Corporation. All rights reserved.
* Copyright 2017 Intel Deutschland GmbH
*/
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/wireless.h>
#include <linux/export.h>
#include <net/iw_handler.h>
#include <net/cfg80211.h>
#include <net/rtnetlink.h>
#include "nl80211.h"
#include "reg.h"
#include "rdev-ops.h"
/*
* Software SME in cfg80211, using auth/assoc/deauth calls to the
* driver. This is for implementing nl80211's connect/disconnect
* and wireless extensions (if configured.)
*/
struct cfg80211_conn {
struct cfg80211_connect_params params;
/* these are sub-states of the _CONNECTING sme_state */
enum {
CFG80211_CONN_SCANNING,
CFG80211_CONN_SCAN_AGAIN,
CFG80211_CONN_AUTHENTICATE_NEXT,
CFG80211_CONN_AUTHENTICATING,
CFG80211_CONN_AUTH_FAILED_TIMEOUT,
CFG80211_CONN_ASSOCIATE_NEXT,
CFG80211_CONN_ASSOCIATING,
CFG80211_CONN_ASSOC_FAILED,
CFG80211_CONN_ASSOC_FAILED_TIMEOUT,
CFG80211_CONN_DEAUTH,
CFG80211_CONN_ABANDON,
CFG80211_CONN_CONNECTED,
} state;
u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
const u8 *ie;
size_t ie_len;
bool auto_auth, prev_bssid_valid;
};
static void cfg80211_sme_free(struct wireless_dev *wdev)
{
if (!wdev->conn)
return;
kfree(wdev->conn->ie);
kfree(wdev->conn);
wdev->conn = NULL;
}
static int cfg80211_conn_scan(struct wireless_dev *wdev)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct cfg80211_scan_request *request;
int n_channels, err;
ASSERT_WDEV_LOCK(wdev);
if (rdev->scan_req || rdev->scan_msg)
return -EBUSY;
if (wdev->conn->params.channel)
n_channels = 1;
else
n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
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) {
enum nl80211_band band = wdev->conn->params.channel->band;
struct ieee80211_supported_band *sband =
wdev->wiphy->bands[band];
if (!sband) {
kfree(request);
return -EINVAL;
}
request->channels[0] = wdev->conn->params.channel;
request->rates[band] = (1 << sband->n_bitrates) - 1;
} else {
int i = 0, j;
enum nl80211_band band;
struct ieee80211_supported_band *bands;
struct ieee80211_channel *channel;
for (band = 0; band < NUM_NL80211_BANDS; band++) {
bands = wdev->wiphy->bands[band];
if (!bands)
continue;
for (j = 0; j < bands->n_channels; j++) {
channel = &bands->channels[j];
if (channel->flags & IEEE80211_CHAN_DISABLED)
continue;
request->channels[i++] = channel;
}
request->rates[band] = (1 << bands->n_bitrates) - 1;
}
n_channels = i;
}
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;
eth_broadcast_addr(request->bssid);
request->wdev = wdev;
request->wiphy = &rdev->wiphy;
request->scan_start = jiffies;
rdev->scan_req = request;
err = rdev_scan(rdev, request);
if (!err) {
wdev->conn->state = CFG80211_CONN_SCANNING;
nl80211_send_scan_start(rdev, wdev);
dev_hold(wdev->netdev);
} else {
rdev->scan_req = NULL;
kfree(request);
}
return err;
}
static int cfg80211_conn_do_work(struct wireless_dev *wdev,
enum nl80211_timeout_reason *treason)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct cfg80211_connect_params *params;
struct cfg80211_auth_request auth_req = {};
struct cfg80211_assoc_request req = {};
int err;
ASSERT_WDEV_LOCK(wdev);
if (!wdev->conn)
return 0;
params = &wdev->conn->params;
switch (wdev->conn->state) {
case CFG80211_CONN_SCANNING:
/* didn't find it during scan ... */
return -ENOENT;
case CFG80211_CONN_SCAN_AGAIN:
return cfg80211_conn_scan(wdev);
case CFG80211_CONN_AUTHENTICATE_NEXT:
if (WARN_ON(!rdev->ops->auth))
return -EOPNOTSUPP;
wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
auth_req.key = params->key;
auth_req.key_len = params->key_len;
auth_req.key_idx = params->key_idx;
auth_req.auth_type = params->auth_type;
auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
params->bssid,
params->ssid, params->ssid_len,
IEEE80211_BSS_TYPE_ESS,
IEEE80211_PRIVACY_ANY);
auth_req.link_id = -1;
err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req);
cfg80211_put_bss(&rdev->wiphy, auth_req.bss);
return err;
case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
*treason = NL80211_TIMEOUT_AUTH;
return -ENOTCONN;
case CFG80211_CONN_ASSOCIATE_NEXT:
if (WARN_ON(!rdev->ops->assoc))
return -EOPNOTSUPP;
wdev->conn->state = CFG80211_CONN_ASSOCIATING;
if (wdev->conn->prev_bssid_valid)
req.prev_bssid = wdev->conn->prev_bssid;
req.ie = params->ie;
req.ie_len = params->ie_len;
req.use_mfp = params->mfp != NL80211_MFP_NO;
req.crypto = params->crypto;
req.flags = params->flags;
req.ht_capa = params->ht_capa;
req.ht_capa_mask = params->ht_capa_mask;
req.vht_capa = params->vht_capa;
req.vht_capa_mask = params->vht_capa_mask;
req.link_id = -1;
req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
params->bssid,
params->ssid, params->ssid_len,
IEEE80211_BSS_TYPE_ESS,
IEEE80211_PRIVACY_ANY);
if (!req.bss) {
err = -ENOENT;
} else {
err = cfg80211_mlme_assoc(rdev, wdev->netdev, &req);
cfg80211_put_bss(&rdev->wiphy, req.bss);
}
if (err)
cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
NULL, 0,
WLAN_REASON_DEAUTH_LEAVING,
false);
return err;
case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
*treason = NL80211_TIMEOUT_ASSOC;
fallthrough;
case CFG80211_CONN_ASSOC_FAILED:
cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
NULL, 0,
WLAN_REASON_DEAUTH_LEAVING, false);
return -ENOTCONN;
case CFG80211_CONN_DEAUTH:
cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
NULL, 0,
WLAN_REASON_DEAUTH_LEAVING, false);
fallthrough;
case CFG80211_CONN_ABANDON:
/* free directly, disconnected event already sent */
cfg80211_sme_free(wdev);
return 0;
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;
enum nl80211_timeout_reason treason;
wiphy_lock(&rdev->wiphy);
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
if (!wdev->netdev)
continue;
wdev_lock(wdev);
if (!netif_running(wdev->netdev)) {
wdev_unlock(wdev);
continue;
}
if (!wdev->conn ||
wdev->conn->state == CFG80211_CONN_CONNECTED) {
wdev_unlock(wdev);
continue;
}
if (wdev->conn->params.bssid) {
memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
bssid = bssid_buf;
}
treason = NL80211_TIMEOUT_UNSPECIFIED;
if (cfg80211_conn_do_work(wdev, &treason)) {
struct cfg80211_connect_resp_params cr;
memset(&cr, 0, sizeof(cr));
cr.status = -1;
cr.links[0].bssid = bssid;
cr.timeout_reason = treason;
__cfg80211_connect_result(wdev->netdev, &cr, false);
}
wdev_unlock(wdev);
}
wiphy_unlock(&rdev->wiphy);
}
/* Returned bss is reference counted and must be cleaned up appropriately. */
static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct cfg80211_bss *bss;
ASSERT_WDEV_LOCK(wdev);
bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
wdev->conn->params.bssid,
wdev->conn->params.ssid,
wdev->conn->params.ssid_len,
wdev->conn_bss_type,
IEEE80211_PRIVACY(wdev->conn->params.privacy));
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_rdev(wdev->wiphy);
struct cfg80211_bss *bss;
ASSERT_WDEV_LOCK(wdev);
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(&rdev->wiphy, bss);
else
schedule_work(&rdev->conn_work);
}
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 wireless_dev *wdev, const u8 *buf, size_t len)
{
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
ASSERT_WDEV_LOCK(wdev);
if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
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) {
struct cfg80211_connect_resp_params cr;
memset(&cr, 0, sizeof(cr));
cr.status = status_code;
cr.links[0].bssid = mgmt->bssid;
cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
__cfg80211_connect_result(wdev->netdev, &cr, false);
} else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
schedule_work(&rdev->conn_work);
}
}
bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
if (!wdev->conn)
return false;
if (status == WLAN_STATUS_SUCCESS) {
wdev->conn->state = CFG80211_CONN_CONNECTED;
return false;
}
if (wdev->conn->prev_bssid_valid) {
/*
* Some stupid APs don't accept reassoc, so we
* need to fall back to trying regular assoc;
* return true so no event is sent to userspace.
*/
wdev->conn->prev_bssid_valid = false;
wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
schedule_work(&rdev->conn_work);
return true;
}
wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
schedule_work(&rdev->conn_work);
return false;
}
void cfg80211_sme_deauth(struct wireless_dev *wdev)
{
cfg80211_sme_free(wdev);
}
void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
if (!wdev->conn)
return;
wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
schedule_work(&rdev->conn_work);
}
void cfg80211_sme_disassoc(struct wireless_dev *wdev)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
if (!wdev->conn)
return;
wdev->conn->state = CFG80211_CONN_DEAUTH;
schedule_work(&rdev->conn_work);
}
void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
if (!wdev->conn)
return;
wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
schedule_work(&rdev->conn_work);
}
void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
if (!wdev->conn)
return;
wdev->conn->state = CFG80211_CONN_ABANDON;
schedule_work(&rdev->conn_work);
}
static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
{
unsigned int link;
for_each_valid_link(wdev, link) {
if (!wdev->links[link].client.current_bss)
continue;
cfg80211_unhold_bss(wdev->links[link].client.current_bss);
cfg80211_put_bss(wdev->wiphy,
&wdev->links[link].client.current_bss->pub);
wdev->links[link].client.current_bss = NULL;
}
}
static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
const u8 *ies, size_t ies_len,
const u8 **out_ies, size_t *out_ies_len)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
u8 *buf;
size_t offs;
if (!rdev->wiphy.extended_capabilities_len ||
(ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
*out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
if (!*out_ies)
return -ENOMEM;
*out_ies_len = ies_len;
return 0;
}
buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (ies_len) {
static const u8 before_extcapa[] = {
/* not listing IEs expected to be created by driver */
WLAN_EID_RSN,
WLAN_EID_QOS_CAPA,
WLAN_EID_RRM_ENABLED_CAPABILITIES,
WLAN_EID_MOBILITY_DOMAIN,
WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
WLAN_EID_BSS_COEX_2040,
};
offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
ARRAY_SIZE(before_extcapa), 0);
memcpy(buf, ies, offs);
/* leave a whole for extended capabilities IE */
memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
ies + offs, ies_len - offs);
} else {
offs = 0;
}
/* place extended capabilities IE (with only driver capabilities) */
buf[offs] = WLAN_EID_EXT_CAPABILITY;
buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
memcpy(buf + offs + 2,
rdev->wiphy.extended_capabilities,
rdev->wiphy.extended_capabilities_len);
*out_ies = buf;
*out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
return 0;
}
static int cfg80211_sme_connect(struct wireless_dev *wdev,
struct cfg80211_connect_params *connect,
const u8 *prev_bssid)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct cfg80211_bss *bss;
int err;
if (!rdev->ops->auth || !rdev->ops->assoc)
return -EOPNOTSUPP;
cfg80211_wdev_release_bsses(wdev);
if (wdev->connected) {
cfg80211_sme_free(wdev);
wdev->connected = false;
}
if (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 (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
&wdev->conn->ie,
&wdev->conn->params.ie_len)) {
kfree(wdev->conn);
wdev->conn = NULL;
return -ENOMEM;
}
wdev->conn->params.ie = wdev->conn->ie;
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;
}
wdev->conn->params.ssid = wdev->u.client.ssid;
wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
/* see if we have the bss already */
bss = cfg80211_get_conn_bss(wdev);
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) {
enum nl80211_timeout_reason treason;
err = cfg80211_conn_do_work(wdev, &treason);
cfg80211_put_bss(wdev->wiphy, 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)
cfg80211_sme_free(wdev);
return err;
}
static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
int err;
if (!wdev->conn)
return 0;
if (!rdev->ops->deauth)
return -EOPNOTSUPP;
if (wdev->conn->state == CFG80211_CONN_SCANNING ||
wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
err = 0;
goto out;
}
/* wdev->conn->params.bssid must be set if > SCANNING */
err = cfg80211_mlme_deauth(rdev, wdev->netdev,
wdev->conn->params.bssid,
NULL, 0, reason, false);
out:
cfg80211_sme_free(wdev);
return err;
}
/*
* code shared for in-device and software SME
*/
static bool cfg80211_is_all_idle(void)
{
struct cfg80211_registered_device *rdev;
struct wireless_dev *wdev;
bool is_all_idle = true;
/*
* 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.
* Also if there is any other active beaconing interface we
* need not issue a disconnect hint and reset any info such
* as chan dfs state, etc.
*/
list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
wdev_lock(wdev);
if (wdev->conn || wdev->connected ||
cfg80211_beaconing_iface_active(wdev))
is_all_idle = false;
wdev_unlock(wdev);
}
}
return is_all_idle;
}
static void disconnect_work(struct work_struct *work)
{
rtnl_lock();
if (cfg80211_is_all_idle())
regulatory_hint_disconnect();
rtnl_unlock();
}
DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
static void
cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
struct cfg80211_connect_resp_params *cr)
{
unsigned int link;
for_each_valid_link(cr, link) {
if (!cr->links[link].bss)
continue;
cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
}
}
/*
* API calls for drivers implementing connect/disconnect and
* SME event handling
*/
/* This method must consume bss one way or another */
void __cfg80211_connect_result(struct net_device *dev,
struct cfg80211_connect_resp_params *cr,
bool wextev)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
const struct element *country_elem = NULL;
const u8 *country_data;
u8 country_datalen;
#ifdef CONFIG_CFG80211_WEXT
union iwreq_data wrqu;
#endif
unsigned int link;
const u8 *connected_addr;
bool bss_not_found = false;
ASSERT_WDEV_LOCK(wdev);
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
goto out;
if (cr->valid_links) {
if (WARN_ON(!cr->ap_mld_addr))
goto out;
for_each_valid_link(cr, link) {
if (WARN_ON(!cr->links[link].addr))
goto out;
}
}
wdev->unprot_beacon_reported = 0;
nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
GFP_KERNEL);
connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
#ifdef CONFIG_CFG80211_WEXT
if (wextev && !cr->valid_links) {
if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
memset(&wrqu, 0, sizeof(wrqu));
wrqu.data.length = cr->req_ie_len;
wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
cr->req_ie);
}
if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
memset(&wrqu, 0, sizeof(wrqu));
wrqu.data.length = cr->resp_ie_len;
wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
cr->resp_ie);
}
memset(&wrqu, 0, sizeof(wrqu));
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
wdev->wext.prev_bssid_valid = true;
}
wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
}
#endif
if (cr->status == WLAN_STATUS_SUCCESS) {
if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
for_each_valid_link(cr, link) {
if (WARN_ON_ONCE(!cr->links[link].bss))
break;
}
}
for_each_valid_link(cr, link) {
if (cr->links[link].bss)
continue;
cr->links[link].bss =
cfg80211_get_bss(wdev->wiphy, NULL,
cr->links[link].bssid,
wdev->u.client.ssid,
wdev->u.client.ssid_len,
wdev->conn_bss_type,
IEEE80211_PRIVACY_ANY);
if (!cr->links[link].bss) {
bss_not_found = true;
break;
}
cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
}
}
cfg80211_wdev_release_bsses(wdev);
if (cr->status != WLAN_STATUS_SUCCESS) {
kfree_sensitive(wdev->connect_keys);
wdev->connect_keys = NULL;
wdev->u.client.ssid_len = 0;
wdev->conn_owner_nlportid = 0;
cfg80211_connect_result_release_bsses(wdev, cr);
cfg80211_sme_free(wdev);
return;
}
if (WARN_ON(bss_not_found)) {
cfg80211_connect_result_release_bsses(wdev, cr);
return;
}
memset(wdev->links, 0, sizeof(wdev->links));
wdev->valid_links = cr->valid_links;
for_each_valid_link(cr, link)
wdev->links[link].client.current_bss =
bss_from_pub(cr->links[link].bss);
wdev->connected = true;
ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
if (cr->valid_links) {
for_each_valid_link(cr, link)
memcpy(wdev->links[link].addr, cr->links[link].addr,
ETH_ALEN);
}
if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
cfg80211_upload_connect_keys(wdev);
rcu_read_lock();
for_each_valid_link(cr, link) {
country_elem =
ieee80211_bss_get_elem(cr->links[link].bss,
WLAN_EID_COUNTRY);
if (country_elem)
break;
}
if (!country_elem) {
rcu_read_unlock();
return;
}
country_datalen = country_elem->datalen;
country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
rcu_read_unlock();
if (!country_data)
return;
regulatory_hint_country_ie(wdev->wiphy,
cr->links[link].bss->channel->band,
country_data, country_datalen);
kfree(country_data);
return;
out:
for_each_valid_link(cr, link)
cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
}
static void cfg80211_update_link_bss(struct wireless_dev *wdev,
struct cfg80211_bss **bss)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct cfg80211_internal_bss *ibss;
if (!*bss)
return;
ibss = bss_from_pub(*bss);
if (list_empty(&ibss->list)) {
struct cfg80211_bss *found = NULL, *tmp = *bss;
found = cfg80211_get_bss(wdev->wiphy, NULL,
(*bss)->bssid,
wdev->u.client.ssid,
wdev->u.client.ssid_len,
wdev->conn_bss_type,
IEEE80211_PRIVACY_ANY);
if (found) {
/* The same BSS is already updated so use it
* instead, as it has latest info.
*/
*bss = found;
} else {
/* Update with BSS provided by driver, it will
* be freshly added and ref cnted, we can free
* the old one.
*
* signal_valid can be false, as we are not
* expecting the BSS to be found.
*
* keep the old timestamp to avoid confusion
*/
cfg80211_bss_update(rdev, ibss, false,
ibss->ts);
}
cfg80211_put_bss(wdev->wiphy, tmp);
}
}
/* Consumes bss object(s) one way or another */
void cfg80211_connect_done(struct net_device *dev,
struct cfg80211_connect_resp_params *params,
gfp_t gfp)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
struct cfg80211_event *ev;
unsigned long flags;
u8 *next;
size_t link_info_size = 0;
unsigned int link;
for_each_valid_link(params, link) {
cfg80211_update_link_bss(wdev, ¶ms->links[link].bss);
link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
link_info_size += params->links[link].addr ? ETH_ALEN : 0;
}
ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
params->req_ie_len + params->resp_ie_len +
params->fils.kek_len + params->fils.pmk_len +
(params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
gfp);
if (!ev) {
for_each_valid_link(params, link)
cfg80211_put_bss(wdev->wiphy,
params->links[link].bss);
return;
}
ev->type = EVENT_CONNECT_RESULT;
next = ((u8 *)ev) + sizeof(*ev);
if (params->ap_mld_addr) {
ev->cr.ap_mld_addr = next;
memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
ETH_ALEN);
next += ETH_ALEN;
}
if (params->req_ie_len) {
ev->cr.req_ie = next;
ev->cr.req_ie_len = params->req_ie_len;
memcpy((void *)ev->cr.req_ie, params->req_ie,
params->req_ie_len);
next += params->req_ie_len;
}
if (params->resp_ie_len) {
ev->cr.resp_ie = next;
ev->cr.resp_ie_len = params->resp_ie_len;
memcpy((void *)ev->cr.resp_ie, params->resp_ie,
params->resp_ie_len);
next += params->resp_ie_len;
}
if (params->fils.kek_len) {
ev->cr.fils.kek = next;
ev->cr.fils.kek_len = params->fils.kek_len;
memcpy((void *)ev->cr.fils.kek, params->fils.kek,
params->fils.kek_len);
next += params->fils.kek_len;
}
if (params->fils.pmk_len) {
ev->cr.fils.pmk = next;
ev->cr.fils.pmk_len = params->fils.pmk_len;
memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
params->fils.pmk_len);
next += params->fils.pmk_len;
}
if (params->fils.pmkid) {
ev->cr.fils.pmkid = next;
memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
WLAN_PMKID_LEN);
next += WLAN_PMKID_LEN;
}
ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
if (params->fils.update_erp_next_seq_num)
ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
ev->cr.valid_links = params->valid_links;
for_each_valid_link(params, link) {
if (params->links[link].bss)
cfg80211_hold_bss(
bss_from_pub(params->links[link].bss));
ev->cr.links[link].bss = params->links[link].bss;