path: root/net/wireless/mlme.c

/*
 * cfg80211 MLME SAP interface
 *
 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/nl80211.h>
#include <linux/slab.h>
#include <linux/wireless.h>
#include <net/cfg80211.h>
#include <net/iw_handler.h>
#include "core.h"
#include "nl80211.h"

void cfg80211_send_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);

	wdev_lock(wdev);

	nl80211_send_rx_auth(rdev, dev, buf, len, GFP_KERNEL);
	cfg80211_sme_rx_auth(dev, buf, len);

	wdev_unlock(wdev);
}
EXPORT_SYMBOL(cfg80211_send_rx_auth);

void cfg80211_send_rx_assoc(struct net_device *dev, struct cfg80211_bss *bss,
			    const u8 *buf, size_t len)
{
	u16 status_code;
	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;
	u8 *ie = mgmt->u.assoc_resp.variable;
	int ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);

	wdev_lock(wdev);

	status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);

	/*
	 * This is a bit of a hack, we don't notify userspace of
	 * a (re-)association reply if we tried to send a reassoc
	 * and got a reject -- we only try again with an assoc
	 * frame instead of reassoc.
	 */
	if (status_code != WLAN_STATUS_SUCCESS && wdev->conn &&
	    cfg80211_sme_failed_reassoc(wdev)) {
		cfg80211_put_bss(bss);
		goto out;
	}

	nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL);

	if (status_code != WLAN_STATUS_SUCCESS && wdev->conn) {
		cfg80211_sme_failed_assoc(wdev);
		/*
		 * do not call connect_result() now because the
		 * sme will schedule work that does it later.
		 */
		cfg80211_put_bss(bss);
		goto out;
	}

	if (!wdev->conn && wdev->sme_state == CFG80211_SME_IDLE) {
		/*
		 * This is for the userspace SME, the CONNECTING
		 * state will be changed to CONNECTED by
		 * __cfg80211_connect_result() below.
		 */
		wdev->sme_state = CFG80211_SME_CONNECTING;
	}

	/* this consumes the bss reference */
	__cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
				  status_code,
				  status_code == WLAN_STATUS_SUCCESS, bss);
 out:
	wdev_unlock(wdev);
}
EXPORT_SYMBOL(cfg80211_send_rx_assoc);

void __cfg80211_send_deauth(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;
	const u8 *bssid = mgmt->bssid;
	bool was_current = false;

	ASSERT_WDEV_LOCK(wdev);

	if (wdev->current_bss &&
	    ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) {
		cfg80211_unhold_bss(wdev->current_bss);
		cfg80211_put_bss(&wdev->current_bss->pub);
		wdev->current_bss = NULL;
		was_current = true;
	}

	nl80211_send_deauth(rdev, dev, buf, len, GFP_KERNEL);

	if (wdev->sme_state == CFG80211_SME_CONNECTED && was_current) {
		u16 reason_code;
		bool from_ap;

		reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);

		from_ap = !ether_addr_equal(mgmt->sa, dev->dev_addr);
		__cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
	} else if (wdev->sme_state == CFG80211_SME_CONNECTING) {
		__cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
					  WLAN_STATUS_UNSPECIFIED_FAILURE,
					  false, NULL);
	}
}
EXPORT_SYMBOL(__cfg80211_send_deauth);

void