prism2wext.c

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/* prism2wext.c -*- linux-c -*-
 *     _     _   ___   _   _  _____  _   _   ___   __   _
 *    | | _ | | / _ \ | | | || ____|| |_| | / _ \ |  \ | |
 *    | || || || /_\ || | | || ___| | ___ || /_\ ||   \| |
 *    | || || || ___ | \ | / | |___ | | | || ___ || |\   |
 * www.\_/ \_/ |_| |_|  \_/  |_____||_| |_||_| |_||_| \__|.de 
 *
 * Wireless Tools 10+ compatibility for linux-wlan-ng based on code
 * of wlancfg and orinoco_cs
 *
 * author:  Reyk Floeter <[e-mail]>
 * home:    https://www.wavehan.de/projekte/prism2/
 * date:    10/04/2001
 * version: 0.0.4
 *
 * This application is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This application is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 * 02111 USA. 
 */

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

#define __NO_VERSION__
#define WAVEHAN 23
#define WLAN_DBVAR prism2_debug

#include <prism2/prism2wext.h>

/* compatibility to wireless extensions */
#if defined(__LINUX_WLAN__) && defined (__KERNEL__)
#if WIRELESS_EXT > 10

/* taken from orinoco.c ;-) */
const long prism2wext_channel_freq[] = {
	2412, 2417, 2422, 2427, 2432, 2437, 2442,
	2447, 2452, 2457, 2462, 2467, 2472, 2484
};

#define NUM_CHANNELS (sizeof(prism2wext_channel_freq) / sizeof(prism2wext_channel_freq[0])) 

/** function declarations =============== */

/* called by p80211wstats_get_wireless_stats for /proc/net/wireless */ 
iw_stats* prism2wext_get_wireless_stats(struct net_device *dev) 
{
	wlandevice_t *wlandev = (wlandevice_t*)dev->priv;
	prism2sta_priv_t *priv = (prism2sta_priv_t*)wlandev->priv;
	hfa384x_t *hw = priv->hw;
	hfa384x_CommTallies32_t tallies = priv->tallies;
	iw_stats* wstats;
	int result = 0;
	UINT8 bytebuf[HFA384x_CMD_ALLOC_LEN_MAX];
	hfa384x_commsquality_t *qual = (hfa384x_commsquality_t*)bytebuf;
	
	DBFENTER;
	
	if (wlandev == (wlandevice_t*) NULL)
		return (iw_stats*) NULL;
	
	wstats = &wlandev->wstats; 
	
	memset(&wstats->qual, 0, sizeof(hfa384x_commsquality_t));
	
	/* get the qualitity settings from the RID and return them
	 * into a struct...  
	 */
	result = hfa384x_drvr_getconfig(hw, 
			HFA384x_RID_COMMSQUALITY, 
			qual, 
			HFA384x_RID_COMMSQUALITY_LEN);
	
	/* set stats for the wireless- stats struct.
	 * we can't return any link quality, if we are in ap (accesspoint) - 
	 * mode!
	 */
	wstats->status = priv->ap;
	wstats->qual.qual = priv->ap ? 0L : qual->CQ_currBSS; 
#ifdef WEXT_IN_DB
	/* Intersil says : dBm = RSSI - 100 - remember that 0x100 == 0x0 */
	/* Important : Wavelan/Orinoco driver do it differently, but I suspect
	 * that they are broken. Somebody need to check that iwconfig
	 * report the proper values before we enable that - Jean II */
	wstats->qual.level = priv->ap ? 0L : (qual->ASL_currBSS + 0x100 - 100);
	wstats->qual.noise = priv->ap ? 0L : (qual->ANL_currFC + 0x100 - 100);
#else	/* WEXT_IN_DB */
	wstats->qual.level = priv->ap ? 0L : qual->ASL_currBSS;
	wstats->qual.noise = priv->ap ? 0L : qual->ANL_currFC;
#endif	/* WEXT_IN_DB */
	wstats->qual.updated = 7;
	wstats->discard.nwid = 0L; /* tallies.txdiscardswrongsa is wrong! */
	wstats->discard.code = tallies.rxdiscardswepundecr; /* am i wrong?! */
	wstats->discard.misc = tallies.txdiscards; /* am i wrong?! */
	
	DBFEXIT;
	
	return &wlandev->wstats;
}

/* wireless extensions' ioctls */ 
int prism2wext_support_ioctl(struct net_device *dev, struct iwreq *iwr, int cmd)
{
	wlandevice_t *wlandev = (wlandevice_t*)dev->priv;
	prism2sta_priv_t *priv = (prism2sta_priv_t*)wlandev->priv;
	hfa384x_t *hw = priv->hw;
	UINT8 bytebuf[HFA384x_BAP_DATALEN_MAX];
	UINT16 *reqbuf = (UINT16*)bytebuf;
	int err = 0, intval = -1;

	DBFENTER; 

	WLAN_LOG_DEBUG1(1, "received wireless extension- compatible ioctl #%d.\n", cmd);
	
	switch (cmd) {
	case SIOCSIWNAME: /* unused */
		err = (-EOPNOTSUPP);
		break;
		
	case SIOCGIWNAME: /* get name == wireless protocol */
		strcpy(iwr->u.name, "IEEE 802.11-b");/* IEEE
							802.11-DS as
							in orinoco.c?
						     */         
		break;
		
	case SIOCSIWNWID:
	case SIOCGIWNWID:
		err = (-EOPNOTSUPP);
		break;
		
	case SIOCSIWFREQ: /* set channel */
		intval = prism2wext_get_channel(&(iwr->u.freq));

 		/* check for valid channels */ 
		if ((!intval) || (intval > NUM_CHANNELS))
			return (-EFAULT); 

                /* Where's the difference between cnfOwnChannel and 
		 * CurrentChannel? 
		 */      
		err = hfa384x_drvr_setconfig(hw, HFA384x_RID_CNFOWNCHANNEL, &intval, HFA384x_RID_CNFOWNCHANNEL_LEN); 
		
		break;

	case SIOCGIWFREQ: /* get channel */
		err = hfa384x_drvr_getconfig(hw, HFA384x_RID_CNFOWNCHANNEL, reqbuf, HFA384x_RID_CNFOWNCHANNEL_LEN);

 		/* check for valid channels */ 
		if ((!*reqbuf) || (*reqbuf > NUM_CHANNELS))
			return (-EFAULT); 

		/* return the correct frequency instead of a channel */
		iwr->u.freq.e = 1;		
		iwr->u.freq.m = prism2wext_channel_freq[(*reqbuf)-1] * 100000;
		
		break;

	case SIOCSIWMODE: /* set operation mode */
		err = (-EOPNOTSUPP);
		break;
		
	case SIOCGIWMODE: /* get operation mode */
		err = priv->ap ? 0 : hfa384x_drvr_getconfig(hw, HFA384x_RID_CNFPORTTYPE, reqbuf, HFA384x_RID_CNFPORTTYPE_LEN);
		
		/* Access Point, infrastructure or ADHOC? */
		iwr->u.mode = priv->ap ? IW_MODE_MASTER : 
			(*reqbuf ? IW_MODE_INFRA : IW_MODE_ADHOC); 
		
		break;

	case SIOCSIWSENS:
	case SIOCGIWSENS:
	case SIOCSIWRANGE:
	case SIOCSIWPRIV:	
	case SIOCSIWSPY:
	case SIOCGIWSPY:
	case SIOCSIWAP: /* set access point MAC addresses (BSSID) */	
		err = (-EOPNOTSUPP);
		break;

	case SIOCGIWAP:	/* get access point MAC addresses (BSSID) */
		err = hfa384x_drvr_getconfig(hw,
					     HFA384x_RID_CURRENTBSSID,
					     &(iwr->u.ap_addr.sa_data), HFA384x_RID_CURRENTBSSID_LEN);
		
		/* it's an ARP- address */
		iwr->u.ap_addr.sa_family = ARPHRD_ETHER;

		break;

	case SIOCGIWAPLIST:	
	case SIOCSIWESSID: /* set ESSID (network name) */
		err = (-EOPNOTSUPP);
		break;

	case SIOCGIWESSID: /* get ESSID */
		if (!priv->ap) {
			err = prism2wext_get_string(hw, &(iwr->u.essid), HFA384x_RID_CURRENTSSID, HFA384x_RID_CURRENTSSID_LEN);
		} else {
			err = prism2wext_get_string(hw, &(iwr->u.essid), HFA384x_RID_CNFOWNSSID, HFA384x_RID_CNFOWNSSID_LEN);
		}

		break;

	case SIOCSIWNICKN: /* set node name/nickname */	
		err = (-EOPNOTSUPP);
		break;

	case SIOCGIWNICKN: /* get node name/nickname */
		err = prism2wext_get_string(hw, &(iwr->u.data), HFA384x_RID_CNFOWNNAME, HFA384x_RID_CNFOWNNAME_LEN);
		break;

	case SIOCSIWRATE: /* set default bit rate (bps) */	
	case SIOCGIWRATE: /* get default bit rate (bps) */	
	case SIOCSIWRTS:	
	case SIOCGIWRTS:	
	case SIOCSIWFRAG:	
	case SIOCGIWFRAG:	
	case SIOCSIWTXPOW:	
	case SIOCGIWTXPOW:	
	case SIOCSIWRETRY:	
	case SIOCGIWRETRY:	
	case SIOCSIWENCODE: /* set encoding token & mode */	
	case SIOCGIWENCODE: /* get encoding token & mode */
		err = (-EOPNOTSUPP);
		break;
		
	case SIOCSIWPOWER:	
	case SIOCGIWPOWER:
		err = (-EOPNOTSUPP);
		break;

	case SIOCGIWRANGE:
		/* Static meta data about the other ioctls */
		if(iwr->u.data.pointer != NULL) {
			struct iw_range range;

			iwr->u.data.length = sizeof(range);
			memset(&range, 0, sizeof(range));

#if WIRELESS_EXT > 10
			range.we_version_compiled = WIRELESS_EXT;
			range.we_version_source = 9;
#endif /* WIRELESS_EXT > 10 */

			/* Max of /proc/net/wireless */
			range.max_qual.qual = 100;	/* ??? */
#ifdef WEXT_IN_DB
			range.max_qual.level = 0x100 - 108;	/* -108 dBm */
			range.max_qual.noise = 0x100 - 108;	/* -108 dBm */
#else	/* WEXT_IN_DB */
			range.max_qual.level = 100;	/* ??? */
			range.max_qual.noise = 100;	/* ??? */
#endif	/* WEXT_IN_DB */

			/* There are lots of other goodies that should go
			 * in there, it will come in its own time - Jean II */

			/* Push that up to the caller */
			if (copy_to_user(iwr->u.data.pointer, &range, sizeof(range)))
				err = -EFAULT;
		}
		break;

	case SIOCGIWPRIV: /* get private ioctls for iwpriv. This is
			     not necessary and not implemented but
			     i'll return a useless dummy for
			     demonstration. */ 
		WLAN_LOG_DEBUG1(1, "%s: SIOCGIWPRIV\n", dev->name);
		if (iwr->u.data.pointer) {
			struct iw_priv_args privtab[] = {
				{ SIOCGIWPRIV, 0, 0, "DUMMY;-)" }, /* no action */
			};
			
			err = verify_area(VERIFY_WRITE, iwr->u.data.pointer, sizeof(privtab));
			if (err)
				break;
			
			iwr->u.data.length = sizeof(privtab) / sizeof(privtab[0]);
			if (copy_to_user(iwr->u.data.pointer, privtab, sizeof(privtab)))
				err = -EFAULT;
		}
		break;

	default:
		err = (-EOPNOTSUPP);
		break;
	}

	DBFEXIT;

	return (err);
}

/* determine a channel */
int prism2wext_get_channel(struct iw_freq *iwf) {
	int mult = 1, chan = -1, i;

	DBFENTER;
	
	if ( (iwf->e == 0) && (iwf->m <= 1000) ) {
		/* input is a channel number */		
		chan = iwf->m;
	} else {
		/* input is a frequency - search the table */
		for (i = 0; i < (6 - iwf->e); i++)
			mult *= 10;
		
		for (i = 0; i < NUM_CHANNELS; i++)
			if (iwf->m == (prism2wext_channel_freq[i] * mult))
				chan = i+1;
	}

	DBFEXIT;
	
	return chan;
}
	
/* return a string value to user space */
int prism2wext_get_string(hfa384x_t *hw, struct iw_point *erq, UINT16 rid, UINT16 len) {
	UINT8 bytebuf[len];
	UINT8 pstrbuf[len];
	hfa384x_bytestr_t *bytestr = (hfa384x_bytestr_t*)bytebuf;
	p80211pstrd_t *pstr = (p80211pstrd_t*)pstrbuf;
	int err = 0;

	DBFENTER;
	
	err = hfa384x_drvr_getconfig(hw, rid, bytebuf, len); 
	if (err)
		return (err);
	
	prism2mgmt_bytestr2pstr(bytestr, pstr); /* convert string to
						   host format */
	
	erq->flags = 1;
	erq->length = pstr->len;
	
	WLAN_LOG_DEBUG1(1, "returning bytestr of %d bytes\n", pstr->len);
	
	if(erq->pointer) {
		if(copy_to_user(erq->pointer, (char*)pstr->data, erq->length))
			return (-EFAULT);
	}
	
	DBFEXIT;

	return (err);
}
#endif
#endif /* compatibility to wireless extensions */