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Diffstat (limited to 'net/wireless/sme.c')
-rw-r--r--net/wireless/sme.c143
1 files changed, 108 insertions, 35 deletions
diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index 8a7dcbf9060..68307883ec8 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -27,10 +27,10 @@ struct cfg80211_conn {
CFG80211_CONN_ASSOCIATE_NEXT,
CFG80211_CONN_ASSOCIATING,
} state;
- u8 bssid[ETH_ALEN];
+ u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
u8 *ie;
size_t ie_len;
- bool auto_auth;
+ bool auto_auth, prev_bssid_valid;
};
@@ -65,7 +65,6 @@ static int cfg80211_conn_scan(struct wireless_dev *wdev)
if (!request)
return -ENOMEM;
- request->channels = (void *)((char *)request + sizeof(*request));
if (wdev->conn->params.channel)
request->channels[0] = wdev->conn->params.channel;
else {
@@ -82,7 +81,7 @@ static int cfg80211_conn_scan(struct wireless_dev *wdev)
}
}
request->n_channels = n_channels;
- request->ssids = (void *)(request->channels + n_channels);
+ request->ssids = (void *)&request->channels[n_channels];
request->n_ssids = 1;
memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
@@ -110,6 +109,7 @@ 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);
@@ -135,15 +135,11 @@ static int cfg80211_conn_do_work(struct wireless_dev *wdev)
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.
- */
+ if (wdev->conn->prev_bssid_valid)
+ prev_bssid = wdev->conn->prev_bssid;
err = __cfg80211_mlme_assoc(rdev, wdev->netdev,
params->channel, params->bssid,
- NULL,
+ prev_bssid,
params->ssid, params->ssid_len,
params->ie, params->ie_len,
false, &params->crypto);
@@ -256,9 +252,11 @@ 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,
@@ -314,6 +312,28 @@ void cfg80211_sme_rx_auth(struct net_device *dev,
}
}
+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_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,
@@ -331,15 +351,13 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
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,
+ 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, 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);
+ resp_ie, resp_ie_len,
+ status, GFP_KERNEL);
#ifdef CONFIG_WIRELESS_EXT
if (wextev) {
@@ -357,8 +375,11 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
memset(&wrqu, 0, sizeof(wrqu));
wrqu.ap_addr.sa_family = ARPHRD_ETHER;
- if (bssid && status == WLAN_STATUS_SUCCESS)
+ 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
@@ -369,18 +390,13 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
wdev->current_bss = NULL;
}
- if (status == WLAN_STATUS_SUCCESS &&
- wdev->sme_state == CFG80211_SME_IDLE)
- goto success;
-
- if (wdev->sme_state != CFG80211_SME_CONNECTING)
- return;
-
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);
@@ -389,7 +405,6 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
return;
}
- success:
if (!bss)
bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid,
wdev->ssid, wdev->ssid_len,
@@ -430,12 +445,15 @@ void cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
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;
- memcpy(ev->cr.bssid, bssid, ETH_ALEN);
+ 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);
@@ -465,7 +483,7 @@ void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
return;
- if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
+ if (wdev->sme_state != CFG80211_SME_CONNECTED)
return;
/* internal error -- how did we get to CONNECTED w/o BSS? */
@@ -509,6 +527,8 @@ void __cfg80211_roamed(struct wireless_dev *wdev, const u8 *bssid,
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
}
@@ -522,6 +542,8 @@ void cfg80211_roamed(struct net_device *dev, const u8 *bssid,
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;
@@ -557,7 +579,7 @@ void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
return;
- if (WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED))
+ if (wdev->sme_state != CFG80211_SME_CONNECTED)
return;
if (wdev->current_bss) {
@@ -570,10 +592,30 @@ void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
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);
@@ -601,6 +643,8 @@ void cfg80211_disconnected(struct net_device *dev, u16 reason,
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;
@@ -621,9 +665,11 @@ 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 cfg80211_cached_keys *connkeys,
+ const u8 *prev_bssid)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
+ struct ieee80211_channel *chan;
int err;
ASSERT_WDEV_LOCK(wdev);
@@ -631,6 +677,10 @@ int __cfg80211_connect(struct cfg80211_registered_device *rdev,
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;
@@ -638,14 +688,28 @@ int __cfg80211_connect(struct cfg80211_registered_device *rdev,
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 (connkeys->params[idx].cipher == WLAN_CIPHER_SUITE_WEP40 ||
- connkeys->params[idx].cipher == WLAN_CIPHER_SUITE_WEP104) {
+ 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;
+ }
}
}
@@ -701,6 +765,11 @@ int __cfg80211_connect(struct cfg80211_registered_device *rdev,
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 both BSSID and channel */
if (wdev->conn->params.bssid && wdev->conn->params.channel) {
wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
@@ -719,6 +788,7 @@ int __cfg80211_connect(struct cfg80211_registered_device *rdev,
}
}
if (err) {
+ kfree(wdev->conn->ie);
kfree(wdev->conn);
wdev->conn = NULL;
wdev->sme_state = CFG80211_SME_IDLE;
@@ -751,9 +821,11 @@ int cfg80211_connect(struct cfg80211_registered_device *rdev,
{
int err;
+ mutex_lock(&rdev->devlist_mtx);
wdev_lock(dev->ieee80211_ptr);
- err = __cfg80211_connect(rdev, dev, connect, connkeys);
+ err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL);
wdev_unlock(dev->ieee80211_ptr);
+ mutex_unlock(&rdev->devlist_mtx);
return err;
}
@@ -786,6 +858,7 @@ int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
(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;
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-13 23:09:31 +0000