drivers/staging/wlan-ng/p80211req.c

   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
  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/wireless.h>
  59 #include <linux/netdevice.h>
  60 #include <linux/etherdevice.h>
  61 #include <net/sock.h>
  62 #include <linux/netlink.h>
  63
  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
  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,
  78                                    int isget);
  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 ----------------------------------------------------------------*/
  96 int p80211req_dorequest(wlandevice_t *wlandev, u8 *msgbuf)
  97 {
  98         int result = 0;
  99         p80211msg_t *msg = (p80211msg_t *) msgbuf;
 100
 101         /* Check to make sure the MSD is running */
 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)) {
 106                 return -ENODEV;
 107         }
 108
 109         /* Check Permissions */
 110         if (!capable(CAP_NET_ADMIN) &&
 111         (msg->msgcode != DIDmsg_dot11req_mibget)) {
 112                 printk(KERN_ERR
 113                        "%s: only dot11req_mibget allowed for non-root.\n",
 114                        wlandev->name);
 115                 return -EPERM;
 116         }
 117
 118         /* Check for busy status */
 119         if (test_and_set_bit(1, &(wlandev->request_pending)))
 120                 return -EBUSY;
 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 */
 128         if (wlandev->mlmerequest != NULL)
 129                 wlandev->mlmerequest(wlandev, msg);
 130
 131         clear_bit(1, &(wlandev->request_pending));
 132         return result;  /* if result==0, msg->status still may contain an err */
 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 ----------------------------------------------------------------*/
 153 static void p80211req_handlemsg(wlandevice_t *wlandev, p80211msg_t *msg)
 154 {
 155         switch (msg->msgcode) {
 156
 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;
 166
 167                         break;
 168                 }
 169         case DIDmsg_dot11req_mibget:
 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                 }
 176         default:
 177                 ;
 178         }                       /* switch msg->msgcode */
 179
 180         return;
 181 }
 182
 183 static int p80211req_mibset_mibget(wlandevice_t *wlandev,
 184                                    p80211msg_dot11req_mibget_t *mib_msg,
 185                                    int isget)
 186 {
 187         p80211itemd_t *mibitem = (p80211itemd_t *) mib_msg->mibattribute.data;
 188         p80211pstrd_t *pstr = (p80211pstrd_t *) mibitem->data;
 189         u8 *key = mibitem->data + sizeof(p80211pstrd_t);
 190
 191         switch (mibitem->did) {
 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;
 214
 215                         if (isget) {
 216                                 *data =
 217                                     wlandev->hostwep & HOSTWEP_DEFAULTKEY_MASK;
 218                         } else {
 219                                 wlandev->hostwep &= ~(HOSTWEP_DEFAULTKEY_MASK);
 220
 221                                 wlandev->hostwep |=
 222                                     (*data & HOSTWEP_DEFAULTKEY_MASK);
 223                         }
 224                         break;
 225                 }
 226         case DIDmib_dot11smt_dot11PrivacyTable_dot11PrivacyInvoked:{
 227                         u32 *data = (u32 *) mibitem->data;
 228
 229                         if (isget) {
 230                                 if (wlandev->hostwep & HOSTWEP_PRIVACYINVOKED)
 231                                         *data = P80211ENUM_truth_true;
 232                                 else
 233                                         *data = P80211ENUM_truth_false;
 234                         } else {
 235                                 wlandev->hostwep &= ~(HOSTWEP_PRIVACYINVOKED);
 236                                 if (*data == P80211ENUM_truth_true)
 237                                         wlandev->hostwep |=
 238                                             HOSTWEP_PRIVACYINVOKED;
 239                         }
 240                         break;
 241                 }
 242         case DIDmib_dot11smt_dot11PrivacyTable_dot11ExcludeUnencrypted:{
 243                         u32 *data = (u32 *) mibitem->data;
 244
 245                         if (isget) {
 246                                 if (wlandev->hostwep &
 247                                     HOSTWEP_EXCLUDEUNENCRYPTED)
 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;
 259                 }
 260         default:
 261                 ;
 262         }
 263
 264         return 0;
 265 }