![Juuso Oikarinen](/assets/img/avatar_default.png)
Add support for basic configuration of a connection quality monitoring to the nl80211 interface, and basic support for notifying about triggered monitoring events. Via this interface a user-space connection manager may configure and receive pre-warning events of deteriorating WLAN connection quality, and start preparing for roaming in advance, before the connection is already lost. An example usage of such a trigger is starting scanning for nearby AP's in an attempt to find one with better connection quality, and associate to it before the connection characteristics of the existing connection become too bad or the association is even lost, leading in a prolonged delay in connectivity. The interface currently supports only RSSI, but it could be later extended to include other parameters, such as signal-to-noise ratio, if need for that arises. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
910 lines
24 KiB
C
910 lines
24 KiB
C
/*
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* cfg80211 MLME SAP interface
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*
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* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/nl80211.h>
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#include <linux/wireless.h>
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#include <net/cfg80211.h>
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#include <net/iw_handler.h>
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#include "core.h"
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#include "nl80211.h"
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void cfg80211_send_rx_auth(struct net_device *dev, const u8 *buf, size_t len)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct wiphy *wiphy = wdev->wiphy;
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struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
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struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
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u8 *bssid = mgmt->bssid;
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int i;
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u16 status = le16_to_cpu(mgmt->u.auth.status_code);
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bool done = false;
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wdev_lock(wdev);
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for (i = 0; i < MAX_AUTH_BSSES; i++) {
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if (wdev->authtry_bsses[i] &&
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memcmp(wdev->authtry_bsses[i]->pub.bssid, bssid,
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ETH_ALEN) == 0) {
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if (status == WLAN_STATUS_SUCCESS) {
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wdev->auth_bsses[i] = wdev->authtry_bsses[i];
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} else {
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cfg80211_unhold_bss(wdev->authtry_bsses[i]);
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cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
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}
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wdev->authtry_bsses[i] = NULL;
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done = true;
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break;
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}
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}
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WARN_ON(!done);
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nl80211_send_rx_auth(rdev, dev, buf, len, GFP_KERNEL);
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cfg80211_sme_rx_auth(dev, buf, len);
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wdev_unlock(wdev);
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}
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EXPORT_SYMBOL(cfg80211_send_rx_auth);
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void cfg80211_send_rx_assoc(struct net_device *dev, const u8 *buf, size_t len)
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{
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u16 status_code;
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct wiphy *wiphy = wdev->wiphy;
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struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
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struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
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u8 *ie = mgmt->u.assoc_resp.variable;
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int i, ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);
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struct cfg80211_internal_bss *bss = NULL;
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wdev_lock(wdev);
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status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
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/*
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* This is a bit of a hack, we don't notify userspace of
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* a (re-)association reply if we tried to send a reassoc
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* and got a reject -- we only try again with an assoc
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* frame instead of reassoc.
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*/
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if (status_code != WLAN_STATUS_SUCCESS && wdev->conn &&
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cfg80211_sme_failed_reassoc(wdev))
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goto out;
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nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL);
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if (status_code == WLAN_STATUS_SUCCESS) {
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for (i = 0; i < MAX_AUTH_BSSES; i++) {
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if (!wdev->auth_bsses[i])
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continue;
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if (memcmp(wdev->auth_bsses[i]->pub.bssid, mgmt->bssid,
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ETH_ALEN) == 0) {
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bss = wdev->auth_bsses[i];
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wdev->auth_bsses[i] = NULL;
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/* additional reference to drop hold */
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cfg80211_ref_bss(bss);
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break;
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}
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}
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/*
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* We might be coming here because the driver reported
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* a successful association at the same time as the
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* user requested a deauth. In that case, we will have
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* removed the BSS from the auth_bsses list due to the
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* deauth request when the assoc response makes it. If
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* the two code paths acquire the lock the other way
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* around, that's just the standard situation of a
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* deauth being requested while connected.
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*/
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if (!bss)
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goto out;
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} else if (wdev->conn) {
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cfg80211_sme_failed_assoc(wdev);
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/*
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* do not call connect_result() now because the
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* sme will schedule work that does it later.
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*/
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goto out;
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}
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if (!wdev->conn && wdev->sme_state == CFG80211_SME_IDLE) {
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/*
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* This is for the userspace SME, the CONNECTING
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* state will be changed to CONNECTED by
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* __cfg80211_connect_result() below.
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*/
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wdev->sme_state = CFG80211_SME_CONNECTING;
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}
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/* this consumes one bss reference (unless bss is NULL) */
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__cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
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status_code,
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status_code == WLAN_STATUS_SUCCESS,
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bss ? &bss->pub : NULL);
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/* drop hold now, and also reference acquired above */
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if (bss) {
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cfg80211_unhold_bss(bss);
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cfg80211_put_bss(&bss->pub);
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}
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out:
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wdev_unlock(wdev);
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}
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EXPORT_SYMBOL(cfg80211_send_rx_assoc);
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void __cfg80211_send_deauth(struct net_device *dev,
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const u8 *buf, size_t len)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct wiphy *wiphy = wdev->wiphy;
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struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
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struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
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const u8 *bssid = mgmt->bssid;
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int i;
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bool found = false;
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ASSERT_WDEV_LOCK(wdev);
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if (wdev->current_bss &&
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memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) {
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cfg80211_unhold_bss(wdev->current_bss);
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cfg80211_put_bss(&wdev->current_bss->pub);
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wdev->current_bss = NULL;
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found = true;
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} else for (i = 0; i < MAX_AUTH_BSSES; i++) {
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if (wdev->auth_bsses[i] &&
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memcmp(wdev->auth_bsses[i]->pub.bssid, bssid, ETH_ALEN) == 0) {
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cfg80211_unhold_bss(wdev->auth_bsses[i]);
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cfg80211_put_bss(&wdev->auth_bsses[i]->pub);
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wdev->auth_bsses[i] = NULL;
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found = true;
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break;
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}
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if (wdev->authtry_bsses[i] &&
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memcmp(wdev->authtry_bsses[i]->pub.bssid, bssid, ETH_ALEN) == 0) {
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cfg80211_unhold_bss(wdev->authtry_bsses[i]);
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cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
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wdev->authtry_bsses[i] = NULL;
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found = true;
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break;
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}
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}
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if (!found)
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return;
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nl80211_send_deauth(rdev, dev, buf, len, GFP_KERNEL);
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if (wdev->sme_state == CFG80211_SME_CONNECTED) {
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u16 reason_code;
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bool from_ap;
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reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
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from_ap = memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0;
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__cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
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} else if (wdev->sme_state == CFG80211_SME_CONNECTING) {
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__cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
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WLAN_STATUS_UNSPECIFIED_FAILURE,
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false, NULL);
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}
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}
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EXPORT_SYMBOL(__cfg80211_send_deauth);
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void cfg80211_send_deauth(struct net_device *dev, const u8 *buf, size_t len)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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wdev_lock(wdev);
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__cfg80211_send_deauth(dev, buf, len);
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wdev_unlock(wdev);
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}
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EXPORT_SYMBOL(cfg80211_send_deauth);
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void __cfg80211_send_disassoc(struct net_device *dev,
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const u8 *buf, size_t len)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct wiphy *wiphy = wdev->wiphy;
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struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
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struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
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const u8 *bssid = mgmt->bssid;
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int i;
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u16 reason_code;
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bool from_ap;
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bool done = false;
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ASSERT_WDEV_LOCK(wdev);
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nl80211_send_disassoc(rdev, dev, buf, len, GFP_KERNEL);
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if (wdev->sme_state != CFG80211_SME_CONNECTED)
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return;
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if (wdev->current_bss &&
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memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) {
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for (i = 0; i < MAX_AUTH_BSSES; i++) {
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if (wdev->authtry_bsses[i] || wdev->auth_bsses[i])
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continue;
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wdev->auth_bsses[i] = wdev->current_bss;
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wdev->current_bss = NULL;
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done = true;
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cfg80211_sme_disassoc(dev, i);
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break;
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}
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WARN_ON(!done);
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} else
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WARN_ON(1);
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reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
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from_ap = memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0;
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__cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
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}
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EXPORT_SYMBOL(__cfg80211_send_disassoc);
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void cfg80211_send_disassoc(struct net_device *dev, const u8 *buf, size_t len)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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wdev_lock(wdev);
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__cfg80211_send_disassoc(dev, buf, len);
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wdev_unlock(wdev);
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}
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EXPORT_SYMBOL(cfg80211_send_disassoc);
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static void __cfg80211_auth_remove(struct wireless_dev *wdev, const u8 *addr)
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{
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int i;
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bool done = false;
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ASSERT_WDEV_LOCK(wdev);
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for (i = 0; addr && i < MAX_AUTH_BSSES; i++) {
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if (wdev->authtry_bsses[i] &&
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memcmp(wdev->authtry_bsses[i]->pub.bssid,
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addr, ETH_ALEN) == 0) {
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cfg80211_unhold_bss(wdev->authtry_bsses[i]);
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cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
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wdev->authtry_bsses[i] = NULL;
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done = true;
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break;
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}
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}
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WARN_ON(!done);
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}
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void __cfg80211_auth_canceled(struct net_device *dev, const u8 *addr)
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{
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__cfg80211_auth_remove(dev->ieee80211_ptr, addr);
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}
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EXPORT_SYMBOL(__cfg80211_auth_canceled);
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void cfg80211_send_auth_timeout(struct net_device *dev, const u8 *addr)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct wiphy *wiphy = wdev->wiphy;
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struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
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wdev_lock(wdev);
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nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
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if (wdev->sme_state == CFG80211_SME_CONNECTING)
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__cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
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WLAN_STATUS_UNSPECIFIED_FAILURE,
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false, NULL);
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__cfg80211_auth_remove(wdev, addr);
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wdev_unlock(wdev);
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}
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EXPORT_SYMBOL(cfg80211_send_auth_timeout);
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void cfg80211_send_assoc_timeout(struct net_device *dev, const u8 *addr)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct wiphy *wiphy = wdev->wiphy;
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struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
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int i;
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bool done = false;
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wdev_lock(wdev);
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nl80211_send_assoc_timeout(rdev, dev, addr, GFP_KERNEL);
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if (wdev->sme_state == CFG80211_SME_CONNECTING)
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__cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
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WLAN_STATUS_UNSPECIFIED_FAILURE,
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false, NULL);
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for (i = 0; addr && i < MAX_AUTH_BSSES; i++) {
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if (wdev->auth_bsses[i] &&
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memcmp(wdev->auth_bsses[i]->pub.bssid,
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addr, ETH_ALEN) == 0) {
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cfg80211_unhold_bss(wdev->auth_bsses[i]);
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cfg80211_put_bss(&wdev->auth_bsses[i]->pub);
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wdev->auth_bsses[i] = NULL;
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done = true;
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break;
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}
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}
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WARN_ON(!done);
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wdev_unlock(wdev);
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}
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EXPORT_SYMBOL(cfg80211_send_assoc_timeout);
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void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
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enum nl80211_key_type key_type, int key_id,
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const u8 *tsc, gfp_t gfp)
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{
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struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
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struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
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#ifdef CONFIG_CFG80211_WEXT
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union iwreq_data wrqu;
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char *buf = kmalloc(128, gfp);
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if (buf) {
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sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
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"keyid=%d %scast addr=%pM)", key_id,
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key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni",
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addr);
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memset(&wrqu, 0, sizeof(wrqu));
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wrqu.data.length = strlen(buf);
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wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
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kfree(buf);
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}
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#endif
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nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp);
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}
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EXPORT_SYMBOL(cfg80211_michael_mic_failure);
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/* some MLME handling for userspace SME */
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int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct ieee80211_channel *chan,
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enum nl80211_auth_type auth_type,
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const u8 *bssid,
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const u8 *ssid, int ssid_len,
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const u8 *ie, int ie_len,
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const u8 *key, int key_len, int key_idx)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct cfg80211_auth_request req;
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struct cfg80211_internal_bss *bss;
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int i, err, slot = -1, nfree = 0;
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ASSERT_WDEV_LOCK(wdev);
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if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
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if (!key || !key_len || key_idx < 0 || key_idx > 4)
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return -EINVAL;
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if (wdev->current_bss &&
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memcmp(bssid, wdev->current_bss->pub.bssid, ETH_ALEN) == 0)
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return -EALREADY;
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for (i = 0; i < MAX_AUTH_BSSES; i++) {
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if (wdev->authtry_bsses[i] &&
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memcmp(bssid, wdev->authtry_bsses[i]->pub.bssid,
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ETH_ALEN) == 0)
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return -EALREADY;
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if (wdev->auth_bsses[i] &&
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memcmp(bssid, wdev->auth_bsses[i]->pub.bssid,
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ETH_ALEN) == 0)
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return -EALREADY;
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}
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memset(&req, 0, sizeof(req));
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req.ie = ie;
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req.ie_len = ie_len;
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req.auth_type = auth_type;
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req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
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WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
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req.key = key;
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req.key_len = key_len;
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req.key_idx = key_idx;
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if (!req.bss)
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return -ENOENT;
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bss = bss_from_pub(req.bss);
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for (i = 0; i < MAX_AUTH_BSSES; i++) {
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if (!wdev->auth_bsses[i] && !wdev->authtry_bsses[i]) {
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slot = i;
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nfree++;
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}
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}
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/* we need one free slot for disassoc and one for this auth */
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if (nfree < 2) {
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err = -ENOSPC;
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goto out;
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}
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wdev->authtry_bsses[slot] = bss;
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cfg80211_hold_bss(bss);
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err = rdev->ops->auth(&rdev->wiphy, dev, &req);
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if (err) {
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wdev->authtry_bsses[slot] = NULL;
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cfg80211_unhold_bss(bss);
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}
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out:
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if (err)
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cfg80211_put_bss(req.bss);
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return err;
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}
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|
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)
|
|
{
|
|
int err;
|
|
|
|
wdev_lock(dev->ieee80211_ptr);
|
|
err = __cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
|
|
ssid, ssid_len, ie, ie_len,
|
|
key, key_len, key_idx);
|
|
wdev_unlock(dev->ieee80211_ptr);
|
|
|
|
return err;
|
|
}
|
|
|
|
int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
|
|
struct net_device *dev,
|
|
struct ieee80211_channel *chan,
|
|
const u8 *bssid, const u8 *prev_bssid,
|
|
const u8 *ssid, int ssid_len,
|
|
const u8 *ie, int ie_len, bool use_mfp,
|
|
struct cfg80211_crypto_settings *crypt)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct cfg80211_assoc_request req;
|
|
struct cfg80211_internal_bss *bss;
|
|
int i, err, slot = -1;
|
|
bool was_connected = false;
|
|
|
|
ASSERT_WDEV_LOCK(wdev);
|
|
|
|
memset(&req, 0, sizeof(req));
|
|
|
|
if (wdev->current_bss && prev_bssid &&
|
|
memcmp(wdev->current_bss->pub.bssid, prev_bssid, ETH_ALEN) == 0) {
|
|
/*
|
|
* Trying to reassociate: Allow this to proceed and let the old
|
|
* association to be dropped when the new one is completed.
|
|
*/
|
|
if (wdev->sme_state == CFG80211_SME_CONNECTED) {
|
|
was_connected = true;
|
|
wdev->sme_state = CFG80211_SME_CONNECTING;
|
|
}
|
|
} else if (wdev->current_bss)
|
|
return -EALREADY;
|
|
|
|
req.ie = ie;
|
|
req.ie_len = ie_len;
|
|
memcpy(&req.crypto, crypt, sizeof(req.crypto));
|
|
req.use_mfp = use_mfp;
|
|
req.prev_bssid = prev_bssid;
|
|
req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
|
|
WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
|
|
if (!req.bss) {
|
|
if (was_connected)
|
|
wdev->sme_state = CFG80211_SME_CONNECTED;
|
|
return -ENOENT;
|
|
}
|
|
|
|
bss = bss_from_pub(req.bss);
|
|
|
|
for (i = 0; i < MAX_AUTH_BSSES; i++) {
|
|
if (bss == wdev->auth_bsses[i]) {
|
|
slot = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (slot < 0) {
|
|
err = -ENOTCONN;
|
|
goto out;
|
|
}
|
|
|
|
err = rdev->ops->assoc(&rdev->wiphy, dev, &req);
|
|
out:
|
|
if (err && was_connected)
|
|
wdev->sme_state = CFG80211_SME_CONNECTED;
|
|
/* still a reference in wdev->auth_bsses[slot] */
|
|
cfg80211_put_bss(req.bss);
|
|
return err;
|
|
}
|
|
|
|
int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
|
|
struct net_device *dev,
|
|
struct ieee80211_channel *chan,
|
|
const u8 *bssid, const u8 *prev_bssid,
|
|
const u8 *ssid, int ssid_len,
|
|
const u8 *ie, int ie_len, bool use_mfp,
|
|
struct cfg80211_crypto_settings *crypt)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
int err;
|
|
|
|
wdev_lock(wdev);
|
|
err = __cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
|
|
ssid, ssid_len, ie, ie_len, use_mfp, crypt);
|
|
wdev_unlock(wdev);
|
|
|
|
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)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct cfg80211_deauth_request req;
|
|
int i;
|
|
|
|
ASSERT_WDEV_LOCK(wdev);
|
|
|
|
memset(&req, 0, sizeof(req));
|
|
req.reason_code = reason;
|
|
req.ie = ie;
|
|
req.ie_len = ie_len;
|
|
if (wdev->current_bss &&
|
|
memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) {
|
|
req.bss = &wdev->current_bss->pub;
|
|
} else for (i = 0; i < MAX_AUTH_BSSES; i++) {
|
|
if (wdev->auth_bsses[i] &&
|
|
memcmp(bssid, wdev->auth_bsses[i]->pub.bssid, ETH_ALEN) == 0) {
|
|
req.bss = &wdev->auth_bsses[i]->pub;
|
|
break;
|
|
}
|
|
if (wdev->authtry_bsses[i] &&
|
|
memcmp(bssid, wdev->authtry_bsses[i]->pub.bssid, ETH_ALEN) == 0) {
|
|
req.bss = &wdev->authtry_bsses[i]->pub;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!req.bss)
|
|
return -ENOTCONN;
|
|
|
|
return rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
|
|
}
|
|
|
|
int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
|
|
struct net_device *dev, const u8 *bssid,
|
|
const u8 *ie, int ie_len, u16 reason)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
int err;
|
|
|
|
wdev_lock(wdev);
|
|
err = __cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason);
|
|
wdev_unlock(wdev);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int __cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
|
|
struct net_device *dev, const u8 *bssid,
|
|
const u8 *ie, int ie_len, u16 reason)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct cfg80211_disassoc_request req;
|
|
|
|
ASSERT_WDEV_LOCK(wdev);
|
|
|
|
if (wdev->sme_state != CFG80211_SME_CONNECTED)
|
|
return -ENOTCONN;
|
|
|
|
if (WARN_ON(!wdev->current_bss))
|
|
return -ENOTCONN;
|
|
|
|
memset(&req, 0, sizeof(req));
|
|
req.reason_code = reason;
|
|
req.ie = ie;
|
|
req.ie_len = ie_len;
|
|
if (memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0)
|
|
req.bss = &wdev->current_bss->pub;
|
|
else
|
|
return -ENOTCONN;
|
|
|
|
return rdev->ops->disassoc(&rdev->wiphy, dev, &req, wdev);
|
|
}
|
|
|
|
int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
|
|
struct net_device *dev, const u8 *bssid,
|
|
const u8 *ie, int ie_len, u16 reason)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
int err;
|
|
|
|
wdev_lock(wdev);
|
|
err = __cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason);
|
|
wdev_unlock(wdev);
|
|
|
|
return err;
|
|
}
|
|
|
|
void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
|
|
struct net_device *dev)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct cfg80211_deauth_request req;
|
|
int i;
|
|
|
|
ASSERT_WDEV_LOCK(wdev);
|
|
|
|
if (!rdev->ops->deauth)
|
|
return;
|
|
|
|
memset(&req, 0, sizeof(req));
|
|
req.reason_code = WLAN_REASON_DEAUTH_LEAVING;
|
|
req.ie = NULL;
|
|
req.ie_len = 0;
|
|
|
|
if (wdev->current_bss) {
|
|
req.bss = &wdev->current_bss->pub;
|
|
rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
|
|
if (wdev->current_bss) {
|
|
cfg80211_unhold_bss(wdev->current_bss);
|
|
cfg80211_put_bss(&wdev->current_bss->pub);
|
|
wdev->current_bss = NULL;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < MAX_AUTH_BSSES; i++) {
|
|
if (wdev->auth_bsses[i]) {
|
|
req.bss = &wdev->auth_bsses[i]->pub;
|
|
rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
|
|
if (wdev->auth_bsses[i]) {
|
|
cfg80211_unhold_bss(wdev->auth_bsses[i]);
|
|
cfg80211_put_bss(&wdev->auth_bsses[i]->pub);
|
|
wdev->auth_bsses[i] = NULL;
|
|
}
|
|
}
|
|
if (wdev->authtry_bsses[i]) {
|
|
req.bss = &wdev->authtry_bsses[i]->pub;
|
|
rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
|
|
if (wdev->authtry_bsses[i]) {
|
|
cfg80211_unhold_bss(wdev->authtry_bsses[i]);
|
|
cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
|
|
wdev->authtry_bsses[i] = NULL;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void cfg80211_ready_on_channel(struct net_device *dev, u64 cookie,
|
|
struct ieee80211_channel *chan,
|
|
enum nl80211_channel_type channel_type,
|
|
unsigned int duration, gfp_t gfp)
|
|
{
|
|
struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
|
|
|
|
nl80211_send_remain_on_channel(rdev, dev, cookie, chan, channel_type,
|
|
duration, gfp);
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_ready_on_channel);
|
|
|
|
void cfg80211_remain_on_channel_expired(struct net_device *dev,
|
|
u64 cookie,
|
|
struct ieee80211_channel *chan,
|
|
enum nl80211_channel_type channel_type,
|
|
gfp_t gfp)
|
|
{
|
|
struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
|
|
|
|
nl80211_send_remain_on_channel_cancel(rdev, dev, cookie, chan,
|
|
channel_type, gfp);
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
|
|
|
|
void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
|
|
struct station_info *sinfo, gfp_t gfp)
|
|
{
|
|
struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
|
|
|
|
nl80211_send_sta_event(rdev, dev, mac_addr, sinfo, gfp);
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_new_sta);
|
|
|
|
struct cfg80211_action_registration {
|
|
struct list_head list;
|
|
|
|
u32 nlpid;
|
|
|
|
int match_len;
|
|
|
|
u8 match[];
|
|
};
|
|
|
|
int cfg80211_mlme_register_action(struct wireless_dev *wdev, u32 snd_pid,
|
|
const u8 *match_data, int match_len)
|
|
{
|
|
struct cfg80211_action_registration *reg, *nreg;
|
|
int err = 0;
|
|
|
|
nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
|
|
if (!nreg)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_bh(&wdev->action_registrations_lock);
|
|
|
|
list_for_each_entry(reg, &wdev->action_registrations, list) {
|
|
int mlen = min(match_len, reg->match_len);
|
|
|
|
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->nlpid = snd_pid;
|
|
list_add(&nreg->list, &wdev->action_registrations);
|
|
|
|
out:
|
|
spin_unlock_bh(&wdev->action_registrations_lock);
|
|
return err;
|
|
}
|
|
|
|
void cfg80211_mlme_unregister_actions(struct wireless_dev *wdev, u32 nlpid)
|
|
{
|
|
struct cfg80211_action_registration *reg, *tmp;
|
|
|
|
spin_lock_bh(&wdev->action_registrations_lock);
|
|
|
|
list_for_each_entry_safe(reg, tmp, &wdev->action_registrations, list) {
|
|
if (reg->nlpid == nlpid) {
|
|
list_del(®->list);
|
|
kfree(reg);
|
|
}
|
|
}
|
|
|
|
spin_unlock_bh(&wdev->action_registrations_lock);
|
|
}
|
|
|
|
void cfg80211_mlme_purge_actions(struct wireless_dev *wdev)
|
|
{
|
|
struct cfg80211_action_registration *reg, *tmp;
|
|
|
|
spin_lock_bh(&wdev->action_registrations_lock);
|
|
|
|
list_for_each_entry_safe(reg, tmp, &wdev->action_registrations, list) {
|
|
list_del(®->list);
|
|
kfree(reg);
|
|
}
|
|
|
|
spin_unlock_bh(&wdev->action_registrations_lock);
|
|
}
|
|
|
|
int cfg80211_mlme_action(struct cfg80211_registered_device *rdev,
|
|
struct net_device *dev,
|
|
struct ieee80211_channel *chan,
|
|
enum nl80211_channel_type channel_type,
|
|
const u8 *buf, size_t len, u64 *cookie)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
const struct ieee80211_mgmt *mgmt;
|
|
|
|
if (rdev->ops->action == NULL)
|
|
return -EOPNOTSUPP;
|
|
if (len < 24 + 1)
|
|
return -EINVAL;
|
|
|
|
mgmt = (const struct ieee80211_mgmt *) buf;
|
|
if (!ieee80211_is_action(mgmt->frame_control))
|
|
return -EINVAL;
|
|
if (mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
|
|
/* Verify that we are associated with the destination AP */
|
|
if (!wdev->current_bss ||
|
|
memcmp(wdev->current_bss->pub.bssid, mgmt->bssid,
|
|
ETH_ALEN) != 0 ||
|
|
memcmp(wdev->current_bss->pub.bssid, mgmt->da,
|
|
ETH_ALEN) != 0)
|
|
return -ENOTCONN;
|
|
}
|
|
|
|
if (memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0)
|
|
return -EINVAL;
|
|
|
|
/* Transmit the Action frame as requested by user space */
|
|
return rdev->ops->action(&rdev->wiphy, dev, chan, channel_type,
|
|
buf, len, cookie);
|
|
}
|
|
|
|
bool cfg80211_rx_action(struct net_device *dev, int freq, const u8 *buf,
|
|
size_t len, gfp_t gfp)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct wiphy *wiphy = wdev->wiphy;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
|
|
struct cfg80211_action_registration *reg;
|
|
const u8 *action_data;
|
|
int action_data_len;
|
|
bool result = false;
|
|
|
|
/* frame length - min size excluding category */
|
|
action_data_len = len - (IEEE80211_MIN_ACTION_SIZE - 1);
|
|
|
|
/* action data starts with category */
|
|
action_data = buf + IEEE80211_MIN_ACTION_SIZE - 1;
|
|
|
|
spin_lock_bh(&wdev->action_registrations_lock);
|
|
|
|
list_for_each_entry(reg, &wdev->action_registrations, list) {
|
|
if (reg->match_len > action_data_len)
|
|
continue;
|
|
|
|
if (memcmp(reg->match, action_data, reg->match_len))
|
|
continue;
|
|
|
|
/* found match! */
|
|
|
|
/* Indicate the received Action frame to user space */
|
|
if (nl80211_send_action(rdev, dev, reg->nlpid, freq,
|
|
buf, len, gfp))
|
|
continue;
|
|
|
|
result = true;
|
|
break;
|
|
}
|
|
|
|
spin_unlock_bh(&wdev->action_registrations_lock);
|
|
|
|
return result;
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_rx_action);
|
|
|
|
void cfg80211_action_tx_status(struct net_device *dev, u64 cookie,
|
|
const u8 *buf, size_t len, bool ack, gfp_t gfp)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct wiphy *wiphy = wdev->wiphy;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
|
|
|
|
/* Indicate TX status of the Action frame to user space */
|
|
nl80211_send_action_tx_status(rdev, dev, cookie, buf, len, ack, gfp);
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_action_tx_status);
|
|
|
|
void cfg80211_cqm_rssi_notify(struct net_device *dev,
|
|
enum nl80211_cqm_rssi_threshold_event rssi_event,
|
|
gfp_t gfp)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
struct wiphy *wiphy = wdev->wiphy;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
|
|
|
|
/* Indicate roaming trigger event to user space */
|
|
nl80211_send_cqm_rssi_notify(rdev, dev, rssi_event, gfp);
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
|