prism2mgmt.c

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/* src/prism2/driver/prism2mgmt.c
*
* Management request handler functions.
*
* Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
* --------------------------------------------------------------------
*
* linux-wlan
*
*   The contents of this file are subject to the Mozilla Public
*   License Version 1.1 (the "License"); you may not use this file
*   except in compliance with the License. You may obtain a copy of
*   the License at http://www.mozilla.org/MPL/
*
*   Software distributed under the License is distributed on an "AS
*   IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
*   implied. See the License for the specific language governing
*   rights and limitations under the License.
*
*   Alternatively, the contents of this file may be used under the
*   terms of the GNU Public License version 2 (the "GPL"), in which
*   case the provisions of the GPL are applicable instead of the
*   above.  If you wish to allow the use of your version of this file
*   only under the terms of the GPL and not to allow others to use
*   your version of this file under the MPL, indicate your decision
*   by deleting the provisions above and replace them with the notice
*   and other provisions required by the GPL.  If you do not delete
*   the provisions above, a recipient may use your version of this
*   file under either the MPL or the GPL.
*
* --------------------------------------------------------------------
*
* Inquiries regarding the linux-wlan Open Source project can be
* made directly to:
*
* AbsoluteValue Systems Inc.
* [e-mail]
* http://www.linux-wlan.com
*
* --------------------------------------------------------------------
*
* Portions of the development of this software were funded by 
* Intersil Corporation as part of PRISM(R) chipset product development.
*
* --------------------------------------------------------------------
*
* The functions in this file handle management requests sent from
* user mode.
*
* Most of these functions have two separate blocks of code that are
* conditional on whether this is a station or an AP.  This is used
* to separate out the STA and AP responses to these management primitives.
* It's a choice (good, bad, indifferent?) to have the code in the same 
* place so it's clear that the same primitive is implemented in both 
* cases but has different behavior.
*
* --------------------------------------------------------------------
*/

/*================================================================*/
/* System Includes */

#define __NO_VERSION__

#include <linux/config.h>
#define WLAN_DBVAR	prism2_debug
#include <linux/version.h>
#include <wlan/wlan_compat.h>

#include <linux/if_arp.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
#include <asm/io.h>
#include <linux/delay.h>
#include <asm/byteorder.h>

#if (WLAN_HOSTIF == WLAN_PCMCIA)
#include <pcmcia/config.h>
#include <pcmcia/k_compat.h>
#include <pcmcia/version.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/driver_ops.h>
#endif

#if ((WLAN_HOSTIF == WLAN_PLX) || (WLAN_HOSTIF == WLAN_PCI))
#include <linux/ioport.h>
#include <linux/pci.h>
#endif

#if (WLAN_HOSTIF == WLAN_USB)
#include <linux/usb.h>
#endif

/*================================================================*/
/* Project Includes */

#include <wlan/version.h>
#include <wlan/p80211types.h>
#include <wlan/p80211hdr.h>
#include <wlan/p80211mgmt.h>
#include <wlan/p80211conv.h>
#include <wlan/p80211msg.h>
#include <wlan/p80211netdev.h>
#include <wlan/p80211metadef.h>
#include <wlan/p80211metastruct.h>
#include <prism2/hfa384x.h>
#include <prism2/prism2mgmt.h>

/*================================================================*/
/* Local Constants */


/*================================================================*/
/* Local Macros */

/* Converts 802.11 format rate specifications to prism2 */
#define p80211rate_to_p2bit(n)	((((n)&~BIT7) == 2) ? BIT0 : \
				 (((n)&~BIT7) == 4) ? BIT1 : \
				 (((n)&~BIT7) == 11) ? BIT2 : \
				 (((n)&~BIT7) == 22) ? BIT3 : 0)

/*================================================================*/
/* Local Types */


/*================================================================*/
/* Local Static Definitions */


/*================================================================*/
/* Local Function Declarations */


/*================================================================*/
/* Function Definitions */


/*----------------------------------------------------------------
* prism2mgmt_powermgmt
*
* Set the power management state of this station's MAC.
*
* Arguments:
*	wlandev		wlan device structure
*	msgp		ptr to msg buffer
*
* Returns: 
*	0	success and done
*	<0	success, but we're waiting for something to finish.
*	>0	an error occurred while handling the message.
* Side effects:
*
* Call context:
*	process thread  (usually)
*	interrupt
----------------------------------------------------------------*/
int prism2mgmt_powermgmt(wlandevice_t *wlandev, void *msgp)
{
	int 			result = 0;
	prism2sta_priv_t	*priv = (prism2sta_priv_t*)wlandev->priv;
	p80211msg_dot11req_powermgmt_t	*msg = msgp;
	DBFENTER;

	if (!priv->ap) {

		/*** STATION ***/

		/*
		 * Set CNFPMENABLED (on or off)
		 * Set CNFMULTICASTRX (if PM on, otherwise clear)
		 * Spout a notice stating that SleepDuration and
		 * HoldoverDuration and PMEPS also have an impact.
		 */
		/* Powermgmt is currently unsupported for STA */
		msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
		msg->resultcode.data = P80211ENUM_resultcode_not_supported;
	} else {

		/*** ACCESS POINT ***/

		/* Powermgmt is never supported for AP */
		msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
		msg->resultcode.data = P80211ENUM_resultcode_not_supported;
	}

	DBFEXIT;
	return result;
}


/*----------------------------------------------------------------
* prism2mgmt_scan
*
* Initiate a scan for BSSs.
*
* This function corresponds to MLME-scan.request and part of 
* MLME-scan.confirm.  As far as I can tell in the standard, there
* are no restrictions on when a scan.request may be issued.  We have
* to handle in whatever state the driver/MAC happen to be.
*
* Arguments:
*	wlandev		wlan device structure
*	msgp		ptr to msg buffer
*
* Returns: 
*	0	success and done
*	<0	success, but we're waiting for something to finish.
*	>0	an error occurred while handling the message.
* Side effects:
*
* Call context:
*	process thread  (usually)
*	interrupt
----------------------------------------------------------------*/
int prism2mgmt_scan(wlandevice_t *wlandev, void *msgp)
{
	int 			result = 0;
	prism2sta_priv_t	*priv = (prism2sta_priv_t*)wlandev->priv;
	p80211msg_dot11req_scan_t	*msg = msgp;
	// hfa384x_t		*hw = priv->hw;
	// hfa384x_ScanRequest_data_t	scanreq;
	// UINT16			word;
	DBFENTER;

	if (!priv->ap) {

		/*** STATION ***/

#if 0
		/* Check the roaming mode to make sure we can scan, change if necessary */
		/* Check the port status, if disabled, then enable */
		/* Construct the channel list */
		/* Set the rate based on...what? */
		if ( !joined )
			rate=min(HFA384x_RID_TXRATECNTL) (aka dot11OperationalRates)
		else
			if ( dot11req_scan.ssid == currssid )
				rate=max(HFA384x_RID_CNF_BASICRATES) 
				   (if supported on STA..we might need to save 
				   this from prior scans)
			else
				rate=min(HFA384x_RID_TXRATECNTL) (aka dot11OperationalRates)
			endif
		endif
			
		/* Set the scan command */
		/* Issue the Inquire */
		/* Sleep until scanresults are in */
		/* Build the persistent (filtered) results */


		word = 2;
		hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFROAMINGMODE, &word);

		/* Issue the scan request */
		scanreq.channelList = host2hfa384x_16(0x07ff); /* scan channels 1-11 */
		scanreq.txRate = host2hfa384x_16(BIT1);        /* probes @ 2Mb/s */
		result = hfa384x_drvr_setconfig( hw, HFA384x_RID_SCANREQUEST,
				&scanreq, HFA384x_RID_SCANREQUEST_LEN);
		if ( result ) {
			WLAN_LOG_ERROR1("setconfig(SCANREQUEST) failed. result=%d\n",
					result);
			result = 0;
		}

		/* Issue an async inquire */
		hfa384x_drvr_scanresults(hw, HFA384x_IT_SCANRESULTS);

		/* sleep until info frame arrives */
#endif
		result = 0;
		msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
		msg->resultcode.data = P80211ENUM_resultcode_not_supported;
	} else {

		/*** ACCESS POINT ***/

		/* Scan is currently unsupported for AP */
		/* TODO: Find out if host managed scan is supported in ap f/w */
		/*       we might want to use it to allow some "auto config"  */
		/*       mode where the AP scans for others and then selects  */
		/*       its channel and settings based on what it finds.     */
		msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
		msg->resultcode.data = P80211ENUM_resultcode_not_supported;
	}

	DBFEXIT;
	return result;
}


/*----------------------------------------------------------------
* prism2mgmt_scan_results
*
* Retrieve the BSS description for one of the BSSs identified in
* a scan.
*
* Arguments:
*	wlandev		wlan device structure
*	msgp		ptr to msg buffer
*
* Returns: 
*	0	success and done
*	<0	success, but we're waiting for something to finish.
*	>0	an error occurred while handling the message.
* Side effects:
*
* Call context:
*	process thread  (usually)
*	interrupt
----------------------------------------------------------------*/
int prism2mgmt_scan_results(wlandevice_t *wlandev, void *msgp)
{
	int 			result = 0;
	prism2sta_priv_t	*priv = (prism2sta_priv_t*)wlandev->priv;
	p80211msg_dot11req_scan_results_t	*msg = msgp;
	DBFENTER;

	if (!priv->ap) {

		/*** STATION ***/

		/* Same situation as scan */
		msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
		msg->resultcode.data = P80211ENUM_resultcode_not_supported;
	} else {

		/*** ACCESS POINT ***/

		/* Same situation as scan */
		msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
		msg->resultcode.data = P80211ENUM_resultcode_not_supported;
	}

	DBFEXIT;
	return result;
}


/*----------------------------------------------------------------
* prism2mgmt_join
*
* Join a BSS whose BSS description was previously obtained with
* a scan.
*
* Arguments:
*	wlandev		wlan device structure
*	msgp		ptr to msg buffer
*
* Returns: 
*	0	success and done
*	<0	success, but we're waiting for something to finish.
*	>0	an error occurred while handling the message.
* Side effects:
*
* Call context:
*	process thread  (usually)
*	interrupt
----------------------------------------------------------------*/
int prism2mgmt_join(wlandevice_t *wlandev, void *msgp)
{
	int 			result = 0;
	prism2sta_priv_t	*priv = (prism2sta_priv_t*)wlandev->priv;
	p80211msg_dot11req_join_t	*msg = msgp;
	DBFENTER;

	if (!priv->ap) {

		/*** STATION ***/

		/* TODO: Implement after scan */
		msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
		msg->resultcode.data = P80211ENUM_resultcode_not_supported;
	} else {

		/*** ACCESS POINT ***/

		/* Never supported by APs */
		msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
		msg->resultcode.data = P80211ENUM_resultcode_not_supported;
	}

	DBFEXIT;
	return result;
}


/*----------------------------------------------------------------
* prism2mgmt_authenticate
*
* Station should be begin an authentication exchange.
*
* Arguments:
*	wlandev		wlan device structure
*	msgp		ptr to msg buffer
*
* Returns: 
*	0	success and done
*	<0	success, but we're waiting for something to finish.
*	>0	an error occurred while handling the message.
* Side effects:
*
* Call context:
*	process thread  (usually)
*	interrupt
----------------------------------------------------------------*/
int prism2mgmt_authenticate(wlandevice_t *wlandev, void *msgp)
{
	int 			result = 0;
	prism2sta_priv_t	*priv = (prism2sta_priv_t*)wlandev->priv;
	p80211msg_dot11req_authenticate_t	*msg = msgp;
	DBFENTER;

	if (!priv->ap) {

		/*** STATION ***/

		/* TODO: Decide how we're going to handle this one w/ Prism2 */
		/*       It could be entertaining since Prism2 doesn't have  */
		/*       an explicit way to control this */
		msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
		msg->resultcode.data = P80211ENUM_resultcode_not_supported;
	} else {

		/*** ACCESS POINT ***/

		/* Never supported by APs */
		msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
		msg->resultcode.data = P80211ENUM_resultcode_not_supported;
	}

	DBFEXIT;
	return result;
}


/*----------------------------------------------------------------
* prism2mgmt_deauthenticate
*
* Send a deauthenticate notification.
*
* Arguments:
*	wlandev		wlan device structure
*	msgp		ptr to msg buffer
*
* Returns: 
*	0	success and done
*	<0	success, but we're waiting for something to finish.
*	>0	an error occurred while handling the message.
* Side effects:
*
* Call context:
*	process thread  (usually)
*	interrupt
----------------------------------------------------------------*/
int prism2mgmt_deauthenticate(wlandevice_t *wlandev, void *msgp)