// SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1)
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/* src/p80211/p80211req.c
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*
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* Request/Indication/MacMgmt interface handling functions
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*
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* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
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* --------------------------------------------------------------------
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*
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* linux-wlan
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*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU Public License version 2 (the "GPL"), in which
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* case the provisions of the GPL are applicable instead of the
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* above. If you wish to allow the use of your version of this file
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* only under the terms of the GPL and not to allow others to use
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* your version of this file under the MPL, indicate your decision
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* by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the MPL or the GPL.
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*
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* --------------------------------------------------------------------
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*
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* Inquiries regarding the linux-wlan Open Source project can be
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* made directly to:
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*
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* AbsoluteValue Systems Inc.
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* info@linux-wlan.com
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* http://www.linux-wlan.com
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*
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* --------------------------------------------------------------------
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*
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* Portions of the development of this software were funded by
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* Intersil Corporation as part of PRISM(R) chipset product development.
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*
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* --------------------------------------------------------------------
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*
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* This file contains the functions, types, and macros to support the
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* MLME request interface that's implemented via the device ioctls.
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*
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* --------------------------------------------------------------------
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <linux/skbuff.h>
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#include <linux/wireless.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <net/sock.h>
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#include <linux/netlink.h>
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#include "p80211types.h"
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#include "p80211hdr.h"
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#include "p80211mgmt.h"
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#include "p80211conv.h"
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#include "p80211msg.h"
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#include "p80211netdev.h"
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#include "p80211ioctl.h"
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#include "p80211metadef.h"
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#include "p80211metastruct.h"
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#include "p80211req.h"
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static void p80211req_handlemsg(struct wlandevice *wlandev,
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struct p80211msg *msg);
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static void p80211req_mibset_mibget(struct wlandevice *wlandev,
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struct p80211msg_dot11req_mibget *mib_msg,
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int isget);
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static void p80211req_handle_action(struct wlandevice *wlandev, u32 *data,
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int isget, u32 flag)
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{
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if (isget) {
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if (wlandev->hostwep & flag)
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*data = P80211ENUM_truth_true;
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else
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*data = P80211ENUM_truth_false;
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} else {
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wlandev->hostwep &= ~flag;
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if (*data == P80211ENUM_truth_true)
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wlandev->hostwep |= flag;
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}
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}
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/*----------------------------------------------------------------
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* p80211req_dorequest
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*
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* Handles an MLME request/confirm message.
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*
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* Arguments:
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* wlandev WLAN device struct
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* msgbuf Buffer containing a request message
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*
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* Returns:
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* 0 on success, an errno otherwise
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*
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* Call context:
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* Potentially blocks the caller, so it's a good idea to
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* not call this function from an interrupt context.
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*----------------------------------------------------------------
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*/
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int p80211req_dorequest(struct wlandevice *wlandev, u8 *msgbuf)
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{
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struct p80211msg *msg = (struct p80211msg *)msgbuf;
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/* Check to make sure the MSD is running */
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if (!((wlandev->msdstate == WLAN_MSD_HWPRESENT &&
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msg->msgcode == DIDmsg_lnxreq_ifstate) ||
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wlandev->msdstate == WLAN_MSD_RUNNING ||
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wlandev->msdstate == WLAN_MSD_FWLOAD)) {
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return -ENODEV;
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}
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/* Check Permissions */
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if (!capable(CAP_NET_ADMIN) &&
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(msg->msgcode != DIDmsg_dot11req_mibget)) {
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netdev_err(wlandev->netdev,
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"%s: only dot11req_mibget allowed for non-root.\n",
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wlandev->name);
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return -EPERM;
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}
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/* Check for busy status */
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if (test_and_set_bit(1, &wlandev->request_pending))
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return -EBUSY;
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/* Allow p80211 to look at msg and handle if desired. */
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/* So far, all p80211 msgs are immediate, no waitq/timer necessary */
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/* This may change. */
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p80211req_handlemsg(wlandev, msg);
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/* Pass it down to wlandev via wlandev->mlmerequest */
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if (wlandev->mlmerequest)
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wlandev->mlmerequest(wlandev, msg);
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clear_bit(1, &wlandev->request_pending);
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return 0; /* if result==0, msg->status still may contain an err */
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}
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/*----------------------------------------------------------------
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* p80211req_handlemsg
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*
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* p80211 message handler. Primarily looks for messages that
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* belong to p80211 and then dispatches the appropriate response.
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* TODO: we don't do anything yet. Once the linuxMIB is better
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* defined we'll need a get/set handler.
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*
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* Arguments:
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* wlandev WLAN device struct
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* msg message structure
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*
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* Returns:
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* nothing (any results are set in the status field of the msg)
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*
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* Call context:
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* Process thread
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*----------------------------------------------------------------
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*/
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static void p80211req_handlemsg(struct wlandevice *wlandev,
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struct p80211msg *msg)
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{
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switch (msg->msgcode) {
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case DIDmsg_lnxreq_hostwep:{
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struct p80211msg_lnxreq_hostwep *req =
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(struct p80211msg_lnxreq_hostwep *)msg;
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wlandev->hostwep &=
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~(HOSTWEP_DECRYPT | HOSTWEP_ENCRYPT);
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if (req->decrypt.data == P80211ENUM_truth_true)
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wlandev->hostwep |= HOSTWEP_DECRYPT;
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if (req->encrypt.data == P80211ENUM_truth_true)
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wlandev->hostwep |= HOSTWEP_ENCRYPT;
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break;
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}
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case DIDmsg_dot11req_mibget:
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case DIDmsg_dot11req_mibset:{
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int isget = (msg->msgcode == DIDmsg_dot11req_mibget);
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struct p80211msg_dot11req_mibget *mib_msg =
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(struct p80211msg_dot11req_mibget *)msg;
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p80211req_mibset_mibget(wlandev, mib_msg, isget);
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break;
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}
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} /* switch msg->msgcode */
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}
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static void p80211req_mibset_mibget(struct wlandevice *wlandev,
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struct p80211msg_dot11req_mibget *mib_msg,
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int isget)
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{
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struct p80211itemd *mibitem =
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(struct p80211itemd *)mib_msg->mibattribute.data;
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struct p80211pstrd *pstr = (struct p80211pstrd *)mibitem->data;
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u8 *key = mibitem->data + sizeof(struct p80211pstrd);
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switch (mibitem->did) {
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case DIDmib_dot11smt_dot11WEPDefaultKeysTable_key(1):
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case DIDmib_dot11smt_dot11WEPDefaultKeysTable_key(2):
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case DIDmib_dot11smt_dot11WEPDefaultKeysTable_key(3):
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case DIDmib_dot11smt_dot11WEPDefaultKeysTable_key(4):
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if (!isget)
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wep_change_key(wlandev,
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P80211DID_ITEM(mibitem->did) - 1,
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key, pstr->len);
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break;
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case DIDmib_dot11smt_dot11PrivacyTable_dot11WEPDefaultKeyID:{
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u32 *data = (u32 *)mibitem->data;
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if (isget) {
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*data = wlandev->hostwep & HOSTWEP_DEFAULTKEY_MASK;
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} else {
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wlandev->hostwep &= ~(HOSTWEP_DEFAULTKEY_MASK);
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wlandev->hostwep |= (*data & HOSTWEP_DEFAULTKEY_MASK);
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}
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break;
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}
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case DIDmib_dot11smt_dot11PrivacyTable_dot11PrivacyInvoked:{
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u32 *data = (u32 *)mibitem->data;
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p80211req_handle_action(wlandev, data, isget,
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HOSTWEP_PRIVACYINVOKED);
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break;
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}
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case DIDmib_dot11smt_dot11PrivacyTable_dot11ExcludeUnencrypted:{
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u32 *data = (u32 *)mibitem->data;
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p80211req_handle_action(wlandev, data, isget,
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HOSTWEP_EXCLUDEUNENCRYPTED);
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break;
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}
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}
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}
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