[deliverable/linux.git] / drivers / staging / wlan-ng / p80211req.c

/* src/p80211/p80211req.c
*
* Request/Indication/MacMgmt interface handling 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.
* info@linux-wlan.com
* 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.
*
* --------------------------------------------------------------------
*
* This file contains the functions, types, and macros to support the
* MLME request interface that's implemented via the device ioctls.
*
* --------------------------------------------------------------------
*/

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/wireless.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <net/sock.h>
#include <linux/netlink.h>

#include "p80211types.h"
#include "p80211hdr.h"
#include "p80211mgmt.h"
#include "p80211conv.h"
#include "p80211msg.h"
#include "p80211netdev.h"
#include "p80211ioctl.h"
#include "p80211metadef.h"
#include "p80211metastruct.h"
#include "p80211req.h"

static void p80211req_handlemsg(wlandevice_t *wlandev, p80211msg_t *msg);
static int p80211req_mibset_mibget(wlandevice_t *wlandev,
				   p80211msg_dot11req_mibget_t *mib_msg,
				   int isget);

/*----------------------------------------------------------------
* p80211req_dorequest
*
* Handles an MLME reqest/confirm message.
*
* Arguments:
*	wlandev		WLAN device struct
*	msgbuf		Buffer containing a request message
*
* Returns:
*	0 on success, an errno otherwise
*
* Call context:
*	Potentially blocks the caller, so it's a good idea to
*	not call this function from an interrupt context.
----------------------------------------------------------------*/
int p80211req_dorequest(wlandevice_t * wlandev, u8 * msgbuf)
{
	int result = 0;
	p80211msg_t *msg = (p80211msg_t *) msgbuf;

	/* Check to make sure the MSD is running */
	if (!((wlandev->msdstate == WLAN_MSD_HWPRESENT &&
	       msg->msgcode == DIDmsg_lnxreq_ifstate) ||
	      wlandev->msdstate == WLAN_MSD_RUNNING ||
	      wlandev->msdstate == WLAN_MSD_FWLOAD)) {
		return -ENODEV;
	}

	/* Check Permissions */
	if (!capable(CAP_NET_ADMIN) && (msg->msgcode != DIDmsg_dot11req_mibget)) {
		printk(KERN_ERR
		       "%s: only dot11req_mibget allowed for non-root.\n",
		       wlandev->name);
		return -EPERM;
	}

	/* Check for busy status */
	if (test_and_set_bit(1, &(wlandev->request_pending)))
		return -EBUSY;

	/* Allow p80211 to look at msg and handle if desired. */
	/* So far, all p80211 msgs are immediate, no waitq/timer necessary */
	/* This may change. */
	p80211req_handlemsg(wlandev, msg);

	/* Pass it down to wlandev via wlandev->mlmerequest */
	if (wlandev->mlmerequest != NULL)
		wlandev->mlmerequest(wlandev, msg);

	clear_bit(1, &(wlandev->request_pending));
	return result;		/* if result==0, msg->status still may contain an err */
}

/*----------------------------------------------------------------
* p80211req_handlemsg
*
* p80211 message handler.  Primarily looks for messages that
* belong to p80211 and then dispatches the appropriate response.
* TODO: we don't do anything yet.  Once the linuxMIB is better
*	defined we'll need a get/set handler.
*
* Arguments:
*	wlandev		WLAN device struct
*	msg		message structure
*
* Returns:
*	nothing (any results are set in the status field of the msg)
*
* Call context:
*	Process thread
----------------------------------------------------------------*/
static void p80211req_handlemsg(wlandevice_t *wlandev, p80211msg_t *msg)
{
	switch (msg->msgcode) {

	case DIDmsg_lnxreq_hostwep:{
			p80211msg_lnxreq_hostwep_t *req =
			    (p80211msg_lnxreq_hostwep_t *) msg;
			wlandev->hostwep &=
			    ~(HOSTWEP_DECRYPT | HOSTWEP_ENCRYPT);
			if (req->decrypt.data == P80211ENUM_truth_true)
				wlandev->hostwep |= HOSTWEP_DECRYPT;
			if (req->encrypt.data == P80211ENUM_truth_true)
				wlandev->hostwep |= HOSTWEP_ENCRYPT;

			break;
		}
	case DIDmsg_dot11req_mibget:
	case DIDmsg_dot11req_mibset:{
			int isget = (msg->msgcode == DIDmsg_dot11req_mibget);
			p80211msg_dot11req_mibget_t *mib_msg =
			    (p80211msg_dot11req_mibget_t *) msg;
			p80211req_mibset_mibget(wlandev, mib_msg, isget);
		}
	default:
		;
	}			/* switch msg->msgcode */

	return;
}

static int p80211req_mibset_mibget(wlandevice_t *wlandev,
				   p80211msg_dot11req_mibget_t *mib_msg,
				   int isget)
{
	p80211itemd_t *mibitem = (p80211itemd_t *) mib_msg->mibattribute.data;
	p80211pstrd_t *pstr = (p80211pstrd_t *) mibitem->data;
	u8 *key = mibitem->data + sizeof(p80211pstrd_t);

	switch (mibitem->did) {
	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey0:{
			if (!isget)
				wep_change_key(wlandev, 0, key, pstr->len);
			break;
		}
	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey1:{
			if (!isget)
				wep_change_key(wlandev, 1, key, pstr->len);
			break;
		}
	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey2:{
			if (!isget)
				wep_change_key(wlandev, 2, key, pstr->len);
			break;
		}
	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey3:{
			if (!isget)
				wep_change_key(wlandev, 3, key, pstr->len);
			break;
		}
	case DIDmib_dot11smt_dot11PrivacyTable_dot11WEPDefaultKeyID:{
			u32 *data = (u32 *) mibitem->data;

			if (isget) {
				*data =
				    wlandev->hostwep & HOSTWEP_DEFAULTKEY_MASK;
			} else {
				wlandev->hostwep &= ~(HOSTWEP_DEFAULTKEY_MASK);

				wlandev->hostwep |=
				    (*data & HOSTWEP_DEFAULTKEY_MASK);
			}
			break;
		}
	case DIDmib_dot11smt_dot11PrivacyTable_dot11PrivacyInvoked:{
			u32 *data = (u32 *) mibitem->data;

			if (isget) {
				if (wlandev->hostwep & HOSTWEP_PRIVACYINVOKED)
					*data = P80211ENUM_truth_true;
				else
					*data = P80211ENUM_truth_false;
			} else {
				wlandev->hostwep &= ~(HOSTWEP_PRIVACYINVOKED);
				if (*data == P80211ENUM_truth_true)
					wlandev->hostwep |=
					    HOSTWEP_PRIVACYINVOKED;
			}
			break;
		}
	case DIDmib_dot11smt_dot11PrivacyTable_dot11ExcludeUnencrypted:{
			u32 *data = (u32 *) mibitem->data;

			if (isget) {
				if (wlandev->hostwep &
				    HOSTWEP_EXCLUDEUNENCRYPTED)
					*data = P80211ENUM_truth_true;
				else
					*data = P80211ENUM_truth_false;
			} else {
				wlandev->hostwep &=
				    ~(HOSTWEP_EXCLUDEUNENCRYPTED);
				if (*data == P80211ENUM_truth_true)
					wlandev->hostwep |=
					    HOSTWEP_EXCLUDEUNENCRYPTED;
			}
			break;
		}
	default:
		;
	}

	return 0;
}
Commit	Line	Data
00b3ed16 GKH	1	/* src/p80211/p80211req.c
	2	*
	3	* Request/Indication/MacMgmt interface handling functions
	4	*
	5	* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
	6	* --------------------------------------------------------------------
	7	*
	8	* linux-wlan
	9	*
	10	* The contents of this file are subject to the Mozilla Public
	11	* License Version 1.1 (the "License"); you may not use this file
	12	* except in compliance with the License. You may obtain a copy of
	13	* the License at http://www.mozilla.org/MPL/
	14	*
	15	* Software distributed under the License is distributed on an "AS
	16	* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
	17	* implied. See the License for the specific language governing
	18	* rights and limitations under the License.
	19	*
	20	* Alternatively, the contents of this file may be used under the
	21	* terms of the GNU Public License version 2 (the "GPL"), in which
	22	* case the provisions of the GPL are applicable instead of the
	23	* above. If you wish to allow the use of your version of this file
	24	* only under the terms of the GPL and not to allow others to use
	25	* your version of this file under the MPL, indicate your decision
	26	* by deleting the provisions above and replace them with the notice
	27	* and other provisions required by the GPL. If you do not delete
	28	* the provisions above, a recipient may use your version of this
	29	* file under either the MPL or the GPL.
	30	*
	31	* --------------------------------------------------------------------
	32	*
	33	* Inquiries regarding the linux-wlan Open Source project can be
	34	* made directly to:
	35	*
	36	* AbsoluteValue Systems Inc.
	37	* info@linux-wlan.com
	38	* http://www.linux-wlan.com
	39	*
	40	* --------------------------------------------------------------------
	41	*
	42	* Portions of the development of this software were funded by
	43	* Intersil Corporation as part of PRISM(R) chipset product development.
	44	*
	45	* --------------------------------------------------------------------
	46	*
	47	* This file contains the functions, types, and macros to support the
	48	* MLME request interface that's implemented via the device ioctls.
	49	*
	50	* --------------------------------------------------------------------
	51	*/
	52
00b3ed16 GKH	53	#include <linux/module.h>
	54	#include <linux/kernel.h>
	55	#include <linux/sched.h>
	56	#include <linux/types.h>
	57	#include <linux/skbuff.h>
	58	#include <linux/slab.h>
	59	#include <linux/wireless.h>
	60	#include <linux/netdevice.h>
	61	#include <linux/etherdevice.h>
	62	#include <net/sock.h>
	63	#include <linux/netlink.h>
	64
00b3ed16 GKH	65	#include "p80211types.h"
	66	#include "p80211hdr.h"
	67	#include "p80211mgmt.h"
	68	#include "p80211conv.h"
	69	#include "p80211msg.h"
	70	#include "p80211netdev.h"
	71	#include "p80211ioctl.h"
	72	#include "p80211metadef.h"
	73	#include "p80211metastruct.h"
	74	#include "p80211req.h"
	75
297f06ce MT	76	static void p80211req_handlemsg(wlandevice_t wlandev, p80211msg_t msg);
	77	static int p80211req_mibset_mibget(wlandevice_t *wlandev,
	78	p80211msg_dot11req_mibget_t *mib_msg,
b1de9675	79	int isget);
00b3ed16 GKH	80
	81	/*----------------------------------------------------------------
	82	* p80211req_dorequest
	83	*
	84	* Handles an MLME reqest/confirm message.
	85	*
	86	* Arguments:
	87	* wlandev WLAN device struct
	88	* msgbuf Buffer containing a request message
	89	*
	90	* Returns:
	91	* 0 on success, an errno otherwise
	92	*
	93	* Call context:
	94	* Potentially blocks the caller, so it's a good idea to
	95	* not call this function from an interrupt context.
	96	----------------------------------------------------------------*/
75f49e07	97	int p80211req_dorequest(wlandevice_t * wlandev, u8 * msgbuf)
00b3ed16	98	{
b1de9675 MM	99	int result = 0;
b1de9675 MM	100	p80211msg_t msg = (p80211msg_t ) msgbuf;
00b3ed16	101
00b3ed16	102	/* Check to make sure the MSD is running */
b1de9675 MM	103	if (!((wlandev->msdstate == WLAN_MSD_HWPRESENT &&
	104	msg->msgcode == DIDmsg_lnxreq_ifstate) \|\|
	105	wlandev->msdstate == WLAN_MSD_RUNNING \|\|
	106	wlandev->msdstate == WLAN_MSD_FWLOAD)) {
00b3ed16 GKH	107	return -ENODEV;
	108	}
	109
	110	/* Check Permissions */
b1de9675 MM	111	if (!capable(CAP_NET_ADMIN) && (msg->msgcode != DIDmsg_dot11req_mibget)) {
	112	printk(KERN_ERR
	113	"%s: only dot11req_mibget allowed for non-root.\n",
	114	wlandev->name);
00b3ed16 GKH	115	return -EPERM;
	116	}
	117
	118	/* Check for busy status */
b1de9675	119	if (test_and_set_bit(1, &(wlandev->request_pending)))
00b3ed16	120	return -EBUSY;
00b3ed16 GKH	121
	122	/* Allow p80211 to look at msg and handle if desired. */
	123	/* So far, all p80211 msgs are immediate, no waitq/timer necessary */
	124	/* This may change. */
	125	p80211req_handlemsg(wlandev, msg);
	126
	127	/* Pass it down to wlandev via wlandev->mlmerequest */
b1de9675	128	if (wlandev->mlmerequest != NULL)
00b3ed16 GKH	129	wlandev->mlmerequest(wlandev, msg);
00b3ed16 GKH	130
b1de9675	131	clear_bit(1, &(wlandev->request_pending));
75f49e07	132	return result; /* if result==0, msg->status still may contain an err */
00b3ed16 GKH	133	}
	134
	135	/*----------------------------------------------------------------
	136	* p80211req_handlemsg
	137	*
	138	* p80211 message handler. Primarily looks for messages that
	139	* belong to p80211 and then dispatches the appropriate response.
	140	* TODO: we don't do anything yet. Once the linuxMIB is better
	141	* defined we'll need a get/set handler.
	142	*
	143	* Arguments:
	144	* wlandev WLAN device struct
	145	* msg message structure
	146	*
	147	* Returns:
	148	* nothing (any results are set in the status field of the msg)
	149	*
	150	* Call context:
	151	* Process thread
	152	----------------------------------------------------------------*/
297f06ce	153	static void p80211req_handlemsg(wlandevice_t wlandev, p80211msg_t msg)
00b3ed16	154	{
00b3ed16 GKH	155	switch (msg->msgcode) {
00b3ed16 GKH	156
b1de9675 MM	157	case DIDmsg_lnxreq_hostwep:{
	158	p80211msg_lnxreq_hostwep_t *req =
	159	(p80211msg_lnxreq_hostwep_t *) msg;
	160	wlandev->hostwep &=
	161	~(HOSTWEP_DECRYPT \| HOSTWEP_ENCRYPT);
	162	if (req->decrypt.data == P80211ENUM_truth_true)
	163	wlandev->hostwep \|= HOSTWEP_DECRYPT;
	164	if (req->encrypt.data == P80211ENUM_truth_true)
	165	wlandev->hostwep \|= HOSTWEP_ENCRYPT;
00b3ed16	166
b1de9675 MM	167	break;
b1de9675 MM	168	}
00b3ed16	169	case DIDmsg_dot11req_mibget:
b1de9675 MM	170	case DIDmsg_dot11req_mibset:{
	171	int isget = (msg->msgcode == DIDmsg_dot11req_mibget);
	172	p80211msg_dot11req_mibget_t *mib_msg =
	173	(p80211msg_dot11req_mibget_t *) msg;
	174	p80211req_mibset_mibget(wlandev, mib_msg, isget);
	175	}
00b3ed16	176	default:
00b3ed16	177	;
b1de9675	178	} /* switch msg->msgcode */
00b3ed16	179
00b3ed16 GKH	180	return;
	181	}
	182
297f06ce MT	183	static int p80211req_mibset_mibget(wlandevice_t *wlandev,
297f06ce MT	184	p80211msg_dot11req_mibget_t *mib_msg,
00b3ed16 GKH	185	int isget)
00b3ed16 GKH	186	{
b1de9675 MM	187	p80211itemd_t mibitem = (p80211itemd_t ) mib_msg->mibattribute.data;
b1de9675 MM	188	p80211pstrd_t pstr = (p80211pstrd_t ) mibitem->data;
aaad4303	189	u8 *key = mibitem->data + sizeof(p80211pstrd_t);
00b3ed16	190
00b3ed16	191	switch (mibitem->did) {
b1de9675 MM	192	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey0:{
	193	if (!isget)
	194	wep_change_key(wlandev, 0, key, pstr->len);
	195	break;
	196	}
	197	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey1:{
	198	if (!isget)
	199	wep_change_key(wlandev, 1, key, pstr->len);
	200	break;
	201	}
	202	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey2:{
	203	if (!isget)
	204	wep_change_key(wlandev, 2, key, pstr->len);
	205	break;
	206	}
	207	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey3:{
	208	if (!isget)
	209	wep_change_key(wlandev, 3, key, pstr->len);
	210	break;
	211	}
	212	case DIDmib_dot11smt_dot11PrivacyTable_dot11WEPDefaultKeyID:{
	213	u32 data = (u32 ) mibitem->data;
00b3ed16	214
b1de9675 MM	215	if (isget) {
	216	*data =
	217	wlandev->hostwep & HOSTWEP_DEFAULTKEY_MASK;
00b3ed16 GKH	218	} else {
	219	wlandev->hostwep &= ~(HOSTWEP_DEFAULTKEY_MASK);
	220
b1de9675 MM	221	wlandev->hostwep \|=
b1de9675 MM	222	(*data & HOSTWEP_DEFAULTKEY_MASK);
00b3ed16	223	}
b1de9675 MM	224	break;
	225	}
	226	case DIDmib_dot11smt_dot11PrivacyTable_dot11PrivacyInvoked:{
	227	u32 data = (u32 ) mibitem->data;
00b3ed16	228
b1de9675 MM	229	if (isget) {
	230	if (wlandev->hostwep & HOSTWEP_PRIVACYINVOKED)
	231	*data = P80211ENUM_truth_true;
	232	else
	233	*data = P80211ENUM_truth_false;
	234	} else {
00b3ed16 GKH	235	wlandev->hostwep &= ~(HOSTWEP_PRIVACYINVOKED);
00b3ed16 GKH	236	if (*data == P80211ENUM_truth_true)
b1de9675 MM	237	wlandev->hostwep \|=
	238	HOSTWEP_PRIVACYINVOKED;
	239	}
	240	break;
00b3ed16	241	}
b1de9675 MM	242	case DIDmib_dot11smt_dot11PrivacyTable_dot11ExcludeUnencrypted:{
b1de9675 MM	243	u32 data = (u32 ) mibitem->data;
00b3ed16	244
b1de9675	245	if (isget) {
75f49e07 MT	246	if (wlandev->hostwep &
75f49e07 MT	247	HOSTWEP_EXCLUDEUNENCRYPTED)
b1de9675 MM	248	*data = P80211ENUM_truth_true;
	249	else
	250	*data = P80211ENUM_truth_false;
	251	} else {
	252	wlandev->hostwep &=
	253	~(HOSTWEP_EXCLUDEUNENCRYPTED);
	254	if (*data == P80211ENUM_truth_true)
	255	wlandev->hostwep \|=
	256	HOSTWEP_EXCLUDEUNENCRYPTED;
	257	}
	258	break;
00b3ed16	259	}
00b3ed16	260	default:
00b3ed16 GKH	261	;
	262	}
	263
00b3ed16 GKH	264	return 0;
00b3ed16 GKH	265	}