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// SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1)
/* 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(struct wlandevice *wlandev,
struct p80211msg *msg);
static void p80211req_mibset_mibget(struct wlandevice *wlandev,
struct p80211msg_dot11req_mibget *mib_msg,
int isget);
static void p80211req_handle_action(struct wlandevice *wlandev, u32 *data,
int isget, u32 flag)
{
if (isget) {
if (wlandev->hostwep & flag)
*data = P80211ENUM_truth_true;
else
*data = P80211ENUM_truth_false;
} else {
wlandev->hostwep &= ~flag;
if (*data == P80211ENUM_truth_true)
wlandev->hostwep |= flag;
}
}
/*----------------------------------------------------------------
* p80211req_dorequest
*
* Handles an MLME request/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(struct wlandevice *wlandev, u8 *msgbuf)
{
struct p80211msg *msg = (struct p80211msg *)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)) {
netdev_err(wlandev->netdev,
"%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)
wlandev->mlmerequest(wlandev, msg);
clear_bit(1, &wlandev->request_pending);
return 0; /* 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(struct wlandevice *wlandev,
struct p80211msg *msg)
{
switch (msg->msgcode) {
case DIDMSG_LNXREQ_HOSTWEP: {
struct p80211msg_lnxreq_hostwep *req =
(struct p80211msg_lnxreq_hostwep *)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);
struct p80211msg_dot11req_mibget *mib_msg =
(struct p80211msg_dot11req_mibget *)msg;
p80211req_mibset_mibget(wlandev, mib_msg, isget);
break;
}
} /* switch msg->msgcode */
}
static void p80211req_mibset_mibget(struct wlandevice *wlandev,
struct p80211msg_dot11req_mibget *mib_msg,
int isget)
{
struct p80211itemd *mibitem =
(struct p80211itemd *)mib_msg->mibattribute.data;
struct p80211pstrd *pstr = (struct p80211pstrd *)mibitem->data;
u8 *key = mibitem->data + sizeof(struct p80211pstrd);
switch (mibitem->did) {
case didmib_dot11smt_wepdefaultkeystable_key(1):
case didmib_dot11smt_wepdefaultkeystable_key(2):
case didmib_dot11smt_wepdefaultkeystable_key(3):
case didmib_dot11smt_wepdefaultkeystable_key(4):
if (!isget)
wep_change_key(wlandev,
P80211DID_ITEM(mibitem->did) - 1,
key, pstr->len);
break;
case DIDMIB_DOT11SMT_PRIVACYTABLE_WEPDEFAULTKEYID: {
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_PRIVACYTABLE_PRIVACYINVOKED: {
u32 *data = (u32 *)mibitem->data;
p80211req_handle_action(wlandev, data, isget,
HOSTWEP_PRIVACYINVOKED);
break;
}
case DIDMIB_DOT11SMT_PRIVACYTABLE_EXCLUDEUNENCRYPTED: {
u32 *data = (u32 *)mibitem->data;
p80211req_handle_action(wlandev, data, isget,
HOSTWEP_EXCLUDEUNENCRYPTED);
break;
}
}
}
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