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/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);
	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
	u8 *bssid = mgmt->bssid;
	int i;
	u16 status = le16_to_cpu(mgmt->u.auth.status_code);
	bool done = false;

	wdev_lock(wdev);

	for (i = 0; i < MAX_AUTH_BSSES; i++) {
		if (wdev->authtry_bsses[i] &&
		    memcmp(wdev->authtry_bsses[i]->pub.bssid, bssid,
							ETH_ALEN) == 0) {
			if (status == WLAN_STATUS_SUCCESS) {
				wdev->auth_bsses[i] = wdev->authtry_bsses[i];
			} else {
				cfg80211_unhold_bss(wdev->authtry_bsses[i]);
				cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
			}
			wdev->authtry_bsses[i] = NULL;
			done = true;
			break;
		}
	}

	if (done) {
		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, 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 i, ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);
	struct cfg80211_internal_bss *bss = NULL;

	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))
		goto out;

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

	if (status_code == WLAN_STATUS_SUCCESS) {
		for (i = 0; i < MAX_AUTH_BSSES; i++) {
			if (!wdev->auth_bsses[i])
				continue;
			if (memcmp(wdev->auth_bsses[i]->pub.bssid, mgmt->bssid,
				   ETH_ALEN) == 0) {
				bss = wdev->auth_bsses[i];
				wdev->auth_bsses[i] = NULL;
				/* additional reference to drop hold */
				cfg80211_ref_bss(bss);
				break;
			}
		}

		/*
		 * We might be coming here because the driver reported
		 * a successful association at the same time as the
		 * user requested a deauth. In that case, we will have
		 * removed the BSS from the auth_bsses list due to the
		 * deauth request when the assoc response makes it. If
		 * the two code paths acquire the lock the other way
		 * around, that's just the standard situation of a
		 * deauth being requested while connected.
		 */
		if (!bss)
			goto out;
	} else if (wdev->conn) {
		cfg80211_sme_failed_assoc(wdev);
		/*
		 * do not call connect_result() now because the
		 * sme will schedule work that does it later.
		 */
		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 one bss reference (unless bss is NULL) */
	__cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
				  status_code,
				  status_code == WLAN_STATUS_SUCCESS,
				  bss ? &bss->pub : NULL);
	/* drop hold now, and also reference acquired above */
	if (bss) {
		cfg80211_unhold_bss(bss);
		cfg80211_put_bss(&bss->pub);
	}

 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;