[mirror_ubuntu-eoan-kernel.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/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>
00b3ed16 GKH	58	#include <linux/wireless.h>
	59	#include <linux/netdevice.h>
	60	#include <linux/etherdevice.h>
	61	#include <net/sock.h>
	62	#include <linux/netlink.h>
	63
00b3ed16 GKH	64	#include "p80211types.h"
	65	#include "p80211hdr.h"
	66	#include "p80211mgmt.h"
	67	#include "p80211conv.h"
	68	#include "p80211msg.h"
	69	#include "p80211netdev.h"
	70	#include "p80211ioctl.h"
	71	#include "p80211metadef.h"
	72	#include "p80211metastruct.h"
	73	#include "p80211req.h"
	74
297f06ce MT	75	static void p80211req_handlemsg(wlandevice_t wlandev, p80211msg_t msg);
	76	static int p80211req_mibset_mibget(wlandevice_t *wlandev,
	77	p80211msg_dot11req_mibget_t *mib_msg,
b1de9675	78	int isget);
00b3ed16 GKH	79
	80	/*----------------------------------------------------------------
	81	* p80211req_dorequest
	82	*
	83	* Handles an MLME reqest/confirm message.
	84	*
	85	* Arguments:
	86	* wlandev WLAN device struct
	87	* msgbuf Buffer containing a request message
	88	*
	89	* Returns:
	90	* 0 on success, an errno otherwise
	91	*
	92	* Call context:
	93	* Potentially blocks the caller, so it's a good idea to
	94	* not call this function from an interrupt context.
	95	----------------------------------------------------------------*/
5dd8acc8	96	int p80211req_dorequest(wlandevice_t wlandev, u8 msgbuf)
00b3ed16	97	{
b1de9675 MM	98	int result = 0;
b1de9675 MM	99	p80211msg_t msg = (p80211msg_t ) msgbuf;
00b3ed16	100
00b3ed16	101	/* Check to make sure the MSD is running */
b1de9675 MM	102	if (!((wlandev->msdstate == WLAN_MSD_HWPRESENT &&
	103	msg->msgcode == DIDmsg_lnxreq_ifstate) \|\|
	104	wlandev->msdstate == WLAN_MSD_RUNNING \|\|
	105	wlandev->msdstate == WLAN_MSD_FWLOAD)) {
00b3ed16 GKH	106	return -ENODEV;
	107	}
	108
	109	/* Check Permissions */
b1de9675 MM	110	if (!capable(CAP_NET_ADMIN) && (msg->msgcode != DIDmsg_dot11req_mibget)) {
	111	printk(KERN_ERR
	112	"%s: only dot11req_mibget allowed for non-root.\n",
	113	wlandev->name);
00b3ed16 GKH	114	return -EPERM;
	115	}
	116
	117	/* Check for busy status */
b1de9675	118	if (test_and_set_bit(1, &(wlandev->request_pending)))
00b3ed16	119	return -EBUSY;
00b3ed16 GKH	120
	121	/* Allow p80211 to look at msg and handle if desired. */
	122	/* So far, all p80211 msgs are immediate, no waitq/timer necessary */
	123	/* This may change. */
	124	p80211req_handlemsg(wlandev, msg);
	125
	126	/* Pass it down to wlandev via wlandev->mlmerequest */
b1de9675	127	if (wlandev->mlmerequest != NULL)
00b3ed16 GKH	128	wlandev->mlmerequest(wlandev, msg);
00b3ed16 GKH	129
b1de9675	130	clear_bit(1, &(wlandev->request_pending));
75f49e07	131	return result; /* if result==0, msg->status still may contain an err */
00b3ed16 GKH	132	}
	133
	134	/*----------------------------------------------------------------
	135	* p80211req_handlemsg
	136	*
	137	* p80211 message handler. Primarily looks for messages that
	138	* belong to p80211 and then dispatches the appropriate response.
	139	* TODO: we don't do anything yet. Once the linuxMIB is better
	140	* defined we'll need a get/set handler.
	141	*
	142	* Arguments:
	143	* wlandev WLAN device struct
	144	* msg message structure
	145	*
	146	* Returns:
	147	* nothing (any results are set in the status field of the msg)
	148	*
	149	* Call context:
	150	* Process thread
	151	----------------------------------------------------------------*/
297f06ce	152	static void p80211req_handlemsg(wlandevice_t wlandev, p80211msg_t msg)
00b3ed16	153	{
00b3ed16 GKH	154	switch (msg->msgcode) {
00b3ed16 GKH	155
b1de9675 MM	156	case DIDmsg_lnxreq_hostwep:{
	157	p80211msg_lnxreq_hostwep_t *req =
	158	(p80211msg_lnxreq_hostwep_t *) msg;
	159	wlandev->hostwep &=
	160	~(HOSTWEP_DECRYPT \| HOSTWEP_ENCRYPT);
	161	if (req->decrypt.data == P80211ENUM_truth_true)
	162	wlandev->hostwep \|= HOSTWEP_DECRYPT;
	163	if (req->encrypt.data == P80211ENUM_truth_true)
	164	wlandev->hostwep \|= HOSTWEP_ENCRYPT;
00b3ed16	165
b1de9675 MM	166	break;
b1de9675 MM	167	}
00b3ed16	168	case DIDmsg_dot11req_mibget:
b1de9675 MM	169	case DIDmsg_dot11req_mibset:{
	170	int isget = (msg->msgcode == DIDmsg_dot11req_mibget);
	171	p80211msg_dot11req_mibget_t *mib_msg =
	172	(p80211msg_dot11req_mibget_t *) msg;
	173	p80211req_mibset_mibget(wlandev, mib_msg, isget);
	174	}
00b3ed16	175	default:
00b3ed16	176	;
b1de9675	177	} /* switch msg->msgcode */
00b3ed16	178
00b3ed16 GKH	179	return;
	180	}
	181
297f06ce MT	182	static int p80211req_mibset_mibget(wlandevice_t *wlandev,
297f06ce MT	183	p80211msg_dot11req_mibget_t *mib_msg,
00b3ed16 GKH	184	int isget)
00b3ed16 GKH	185	{
b1de9675 MM	186	p80211itemd_t mibitem = (p80211itemd_t ) mib_msg->mibattribute.data;
b1de9675 MM	187	p80211pstrd_t pstr = (p80211pstrd_t ) mibitem->data;
aaad4303	188	u8 *key = mibitem->data + sizeof(p80211pstrd_t);
00b3ed16	189
00b3ed16	190	switch (mibitem->did) {
b1de9675 MM	191	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey0:{
	192	if (!isget)
	193	wep_change_key(wlandev, 0, key, pstr->len);
	194	break;
	195	}
	196	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey1:{
	197	if (!isget)
	198	wep_change_key(wlandev, 1, key, pstr->len);
	199	break;
	200	}
	201	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey2:{
	202	if (!isget)
	203	wep_change_key(wlandev, 2, key, pstr->len);
	204	break;
	205	}
	206	case DIDmib_dot11smt_dot11WEPDefaultKeysTable_dot11WEPDefaultKey3:{
	207	if (!isget)
	208	wep_change_key(wlandev, 3, key, pstr->len);
	209	break;
	210	}
	211	case DIDmib_dot11smt_dot11PrivacyTable_dot11WEPDefaultKeyID:{
	212	u32 data = (u32 ) mibitem->data;
00b3ed16	213
b1de9675 MM	214	if (isget) {
	215	*data =
	216	wlandev->hostwep & HOSTWEP_DEFAULTKEY_MASK;
00b3ed16 GKH	217	} else {
	218	wlandev->hostwep &= ~(HOSTWEP_DEFAULTKEY_MASK);
	219
b1de9675 MM	220	wlandev->hostwep \|=
b1de9675 MM	221	(*data & HOSTWEP_DEFAULTKEY_MASK);
00b3ed16	222	}
b1de9675 MM	223	break;
	224	}
	225	case DIDmib_dot11smt_dot11PrivacyTable_dot11PrivacyInvoked:{
	226	u32 data = (u32 ) mibitem->data;
00b3ed16	227
b1de9675 MM	228	if (isget) {
	229	if (wlandev->hostwep & HOSTWEP_PRIVACYINVOKED)
	230	*data = P80211ENUM_truth_true;
	231	else
	232	*data = P80211ENUM_truth_false;
	233	} else {
00b3ed16 GKH	234	wlandev->hostwep &= ~(HOSTWEP_PRIVACYINVOKED);
00b3ed16 GKH	235	if (*data == P80211ENUM_truth_true)
b1de9675 MM	236	wlandev->hostwep \|=
	237	HOSTWEP_PRIVACYINVOKED;
	238	}
	239	break;
00b3ed16	240	}
b1de9675 MM	241	case DIDmib_dot11smt_dot11PrivacyTable_dot11ExcludeUnencrypted:{
b1de9675 MM	242	u32 data = (u32 ) mibitem->data;
00b3ed16	243
b1de9675	244	if (isget) {
75f49e07 MT	245	if (wlandev->hostwep &
75f49e07 MT	246	HOSTWEP_EXCLUDEUNENCRYPTED)
b1de9675 MM	247	*data = P80211ENUM_truth_true;
	248	else
	249	*data = P80211ENUM_truth_false;
	250	} else {
	251	wlandev->hostwep &=
	252	~(HOSTWEP_EXCLUDEUNENCRYPTED);
	253	if (*data == P80211ENUM_truth_true)
	254	wlandev->hostwep \|=
	255	HOSTWEP_EXCLUDEUNENCRYPTED;
	256	}
	257	break;
00b3ed16	258	}
00b3ed16	259	default:
00b3ed16 GKH	260	;
	261	}
	262
00b3ed16 GKH	263	return 0;
00b3ed16 GKH	264	}