drivers/staging/vt6655/IEEE11h.c

   1 /*
   2  * Copyright (c) 1996, 2005 VIA Networking Technologies, Inc.
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  *
  20  * File: IEEE11h.c
  21  *
  22  * Purpose:
  23  *
  24  * Functions:
  25  *
  26  * Revision History:
  27  *
  28  * Author: Yiching Chen
  29  *
  30  * Date: Mar. 31, 2005
  31  *
  32  */
  33
  34 #include "ttype.h"
  35 #include "tmacro.h"
  36 #include "tether.h"
  37 #include "IEEE11h.h"
  38 #include "device.h"
  39 #include "wmgr.h"
  40 #include "rxtx.h"
  41 #include "channel.h"
  42
  43 /*---------------------  Static Definitions -------------------------*/
  44 static int          msglevel                = MSG_LEVEL_INFO;
  45
  46 #pragma pack(1)
  47
  48 typedef struct _WLAN_FRAME_ACTION {
  49         WLAN_80211HDR_A3    Header;
  50         unsigned char byCategory;
  51         unsigned char byAction;
  52         unsigned char abyVars[1];
  53 } WLAN_FRAME_ACTION, *PWLAN_FRAME_ACTION;
  54
  55 typedef struct _WLAN_FRAME_MSRREQ {
  56         WLAN_80211HDR_A3    Header;
  57         unsigned char byCategory;
  58         unsigned char byAction;
  59         unsigned char byDialogToken;
  60         WLAN_IE_MEASURE_REQ sMSRReqEIDs[1];
  61 } WLAN_FRAME_MSRREQ, *PWLAN_FRAME_MSRREQ;
  62
  63 typedef struct _WLAN_FRAME_MSRREP {
  64         WLAN_80211HDR_A3    Header;
  65         unsigned char byCategory;
  66         unsigned char byAction;
  67         unsigned char byDialogToken;
  68         WLAN_IE_MEASURE_REP sMSRRepEIDs[1];
  69 } WLAN_FRAME_MSRREP, *PWLAN_FRAME_MSRREP;
  70
  71 typedef struct _WLAN_FRAME_TPCREQ {
  72         WLAN_80211HDR_A3    Header;
  73         unsigned char byCategory;
  74         unsigned char byAction;
  75         unsigned char byDialogToken;
  76         WLAN_IE_TPC_REQ     sTPCReqEIDs;
  77 } WLAN_FRAME_TPCREQ, *PWLAN_FRAME_TPCREQ;
  78
  79 typedef struct _WLAN_FRAME_TPCREP {
  80         WLAN_80211HDR_A3    Header;
  81         unsigned char byCategory;
  82         unsigned char byAction;
  83         unsigned char byDialogToken;
  84         WLAN_IE_TPC_REP     sTPCRepEIDs;
  85 } WLAN_FRAME_TPCREP, *PWLAN_FRAME_TPCREP;
  86
  87 #pragma pack()
  88
  89 /* action field reference ieee 802.11h Table 20e */
  90 #define ACTION_MSRREQ       0
  91 #define ACTION_MSRREP       1
  92 #define ACTION_TPCREQ       2
  93 #define ACTION_TPCREP       3
  94 #define ACTION_CHSW         4
  95
  96 /*---------------------  Static Classes  ----------------------------*/
  97
  98 /*---------------------  Static Variables  --------------------------*/
  99
 100 /*---------------------  Static Functions  --------------------------*/
 101 static bool s_bRxMSRReq(PSMgmtObject pMgmt, PWLAN_FRAME_MSRREQ pMSRReq,
 102                 unsigned int uLength)
 103 {
 104         size_t    uNumOfEIDs = 0;
 105         bool bResult = true;
 106
 107         if (uLength <= WLAN_A3FR_MAXLEN)
 108                 memcpy(pMgmt->abyCurrentMSRReq, pMSRReq, uLength);
 109         uNumOfEIDs = ((uLength - offsetof(WLAN_FRAME_MSRREQ,
 110                         sMSRReqEIDs))/
 111                         (sizeof(WLAN_IE_MEASURE_REQ)));
 112         pMgmt->pCurrMeasureEIDRep = &(((PWLAN_FRAME_MSRREP)
 113                         (pMgmt->abyCurrentMSRRep))->sMSRRepEIDs[0]);
 114         pMgmt->uLengthOfRepEIDs = 0;
 115         bResult = CARDbStartMeasure(pMgmt->pAdapter,
 116                                 ((PWLAN_FRAME_MSRREQ)
 117                                 (pMgmt->abyCurrentMSRReq))->sMSRReqEIDs,
 118                                 uNumOfEIDs
 119                                 );
 120         return bResult;
 121 }
 122
 123
 124 static bool s_bRxTPCReq(PSMgmtObject pMgmt,
 125                         PWLAN_FRAME_TPCREQ pTPCReq,
 126                         unsigned char byRate,
 127                         unsigned char byRSSI)
 128 {
 129         PWLAN_FRAME_TPCREP  pFrame;
 130         PSTxMgmtPacket      pTxPacket = NULL;
 131
 132         pTxPacket = (PSTxMgmtPacket)pMgmt->pbyMgmtPacketPool;
 133         memset(pTxPacket, 0, sizeof(STxMgmtPacket) + WLAN_A3FR_MAXLEN);
 134         pTxPacket->p80211Header = (PUWLAN_80211HDR)((unsigned char *)pTxPacket +
 135 sizeof(STxMgmtPacket));
 136
 137         pFrame = (PWLAN_FRAME_TPCREP)((unsigned char *)pTxPacket +
 138 sizeof(STxMgmtPacket));
 139
 140         pFrame->Header.wFrameCtl = (WLAN_SET_FC_FTYPE(WLAN_FTYPE_MGMT) |
 141                                 WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_ACTION)
 142                                 );
 143
 144         memcpy(pFrame->Header.abyAddr1,
 145                 pTPCReq->Header.abyAddr2,
 146                 WLAN_ADDR_LEN);
 147         memcpy(pFrame->Header.abyAddr2,
 148                 CARDpGetCurrentAddress(pMgmt->pAdapter),
 149                 WLAN_ADDR_LEN);
 150         memcpy(pFrame->Header.abyAddr3,
 151                 pMgmt->abyCurrBSSID,
 152                 WLAN_BSSID_LEN);
 153
 154         pFrame->byCategory = 0;
 155         pFrame->byAction = 3;
 156         pFrame->byDialogToken = ((PWLAN_FRAME_MSRREQ)
 157 (pMgmt->abyCurrentMSRReq))->byDialogToken;
 158
 159         pFrame->sTPCRepEIDs.byElementID = WLAN_EID_TPC_REP;
 160         pFrame->sTPCRepEIDs.len = 2;
 161         pFrame->sTPCRepEIDs.byTxPower = CARDbyGetTransmitPower(pMgmt->pAdapter);
 162         switch (byRate) {
 163         case RATE_54M:
 164                 pFrame->sTPCRepEIDs.byLinkMargin = 65 - byRSSI;
 165                 break;
 166         case RATE_48M:
 167                 pFrame->sTPCRepEIDs.byLinkMargin = 66 - byRSSI;
 168                 break;
 169         case RATE_36M:
 170                 pFrame->sTPCRepEIDs.byLinkMargin = 70 - byRSSI;
 171                 break;
 172         case RATE_24M:
 173                 pFrame->sTPCRepEIDs.byLinkMargin = 74 - byRSSI;
 174                 break;
 175         case RATE_18M:
 176                 pFrame->sTPCRepEIDs.byLinkMargin = 77 - byRSSI;
 177                 break;
 178         case RATE_12M:
 179                 pFrame->sTPCRepEIDs.byLinkMargin = 79 - byRSSI;
 180                 break;
 181         case RATE_9M:
 182                 pFrame->sTPCRepEIDs.byLinkMargin = 81 - byRSSI;
 183                 break;
 184         case RATE_6M:
 185         default:
 186                 pFrame->sTPCRepEIDs.byLinkMargin = 82 - byRSSI;
 187                 break;
 188 }
 189
 190         pTxPacket->cbMPDULen = sizeof(WLAN_FRAME_TPCREP);
 191         pTxPacket->cbPayloadLen = sizeof(WLAN_FRAME_TPCREP) -
 192 WLAN_HDR_ADDR3_LEN;
 193         if (csMgmt_xmit(pMgmt->pAdapter, pTxPacket) != CMD_STATUS_PENDING)
 194                 return false;
 195         return true;
 196 /*    return (CARDbSendPacket(pMgmt->pAdapter, pFrame, PKT_TYPE_802_11_MNG,
 197 sizeof(WLAN_FRAME_TPCREP))); */
 198
 199 }
 200
 201
 202 /*---------------------  Export Variables  --------------------------*/
 203
 204 /*---------------------  Export Functions  --------------------------*/
 205
 206
 207 /*+
 208  *
 209  * Description:
 210  *      Handles action management frames.
 211  *
 212  * Parameters:
 213  *  In:
 214  *      pMgmt           - Management Object structure
 215  *      pRxPacket       - Received packet
 216  *  Out:
 217  *      none
 218  *
 219  * Return Value: None.
 220  *
 221 -*/
 222 bool
 223 IEEE11hbMgrRxAction(void *pMgmtHandle, void *pRxPacket)
 224 {
 225         PSMgmtObject            pMgmt = (PSMgmtObject) pMgmtHandle;
 226         PWLAN_FRAME_ACTION      pAction = NULL;
 227         unsigned int uLength = 0;
 228         PWLAN_IE_CH_SW          pChannelSwitch = NULL;
 229
 230         /* decode the frame */
 231         uLength = ((PSRxMgmtPacket)pRxPacket)->cbMPDULen;
 232         if (uLength > WLAN_A3FR_MAXLEN)
 233                 return false;
 234
 235         pAction = (PWLAN_FRAME_ACTION)
 236 (((PSRxMgmtPacket)pRxPacket)->p80211Header);
 237
 238         if (pAction->byCategory == 0) {
 239                 switch (pAction->byAction) {
 240                 case ACTION_MSRREQ:
 241                         return s_bRxMSRReq(pMgmt,
 242                                         (PWLAN_FRAME_MSRREQ)
 243                                         pAction,
 244                                         uLength);
 245                         break;
 246                 case ACTION_MSRREP:
 247                         break;
 248                 case ACTION_TPCREQ:
 249                         return s_bRxTPCReq(pMgmt,
 250                                 (PWLAN_FRAME_TPCREQ) pAction,
 251                                 ((PSRxMgmtPacket)pRxPacket)->byRxRate,
 252                                 (unsigned char)
 253                                 ((PSRxMgmtPacket)pRxPacket)->uRSSI);
 254                         break;
 255                 case ACTION_TPCREP:
 256                         break;
 257                 case ACTION_CHSW:
 258                         pChannelSwitch = (PWLAN_IE_CH_SW) (pAction->abyVars);
 259                         if ((pChannelSwitch->byElementID == WLAN_EID_CH_SWITCH)
 260                         && (pChannelSwitch->len == 3)) {
 261                                 /* valid element id */
 262                                 CARDbChannelSwitch(pMgmt->pAdapter,
 263                                 pChannelSwitch->byMode,
 264                                 get_channel_mapping(pMgmt->pAdapter,
 265                                 pChannelSwitch->byChannel,
 266                                 pMgmt->eCurrentPHYMode),
 267                                 pChannelSwitch->byCount);
 268                         }
 269                         break;
 270                 default:
 271                         DBG_PRT(MSG_LEVEL_DEBUG,
 272                                 KERN_INFO"Unknown Action = %d\n",
 273                                 pAction->byAction);
 274                         break;
 275                 }
 276         } else {
 277         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Unknown Category = %d\n",
 278 pAction->byCategory);
 279         pAction->byCategory |= 0x80;
 280
 281         /*return (CARDbSendPacket(pMgmt->pAdapter, pAction, PKT_TYPE_802_11_MNG,
 282 uLength));*/
 283         return true;
 284         }
 285         return true;
 286 }
 287
 288
 289 bool IEEE11hbMSRRepTx(void *pMgmtHandle)
 290 {
 291         PSMgmtObject            pMgmt = (PSMgmtObject) pMgmtHandle;
 292         PWLAN_FRAME_MSRREP      pMSRRep = (PWLAN_FRAME_MSRREP)
 293 (pMgmt->abyCurrentMSRRep + sizeof(STxMgmtPacket));
 294         size_t                    uLength = 0;
 295         PSTxMgmtPacket          pTxPacket = NULL;
 296
 297         pTxPacket = (PSTxMgmtPacket)pMgmt->abyCurrentMSRRep;
 298         memset(pTxPacket, 0, sizeof(STxMgmtPacket) + WLAN_A3FR_MAXLEN);
 299         pTxPacket->p80211Header = (PUWLAN_80211HDR)((unsigned char *)pTxPacket +
 300 sizeof(STxMgmtPacket));
 301
 302         pMSRRep->Header.wFrameCtl = (WLAN_SET_FC_FTYPE(WLAN_FTYPE_MGMT) |
 303                                 WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_ACTION)
 304                                 );
 305
 306         memcpy(pMSRRep->Header.abyAddr1, ((PWLAN_FRAME_MSRREQ)
 307                 (pMgmt->abyCurrentMSRReq))->Header.abyAddr2, WLAN_ADDR_LEN);
 308         memcpy(pMSRRep->Header.abyAddr2,
 309                 CARDpGetCurrentAddress(pMgmt->pAdapter), WLAN_ADDR_LEN);
 310         memcpy(pMSRRep->Header.abyAddr3, pMgmt->abyCurrBSSID, WLAN_BSSID_LEN);
 311
 312         pMSRRep->byCategory = 0;
 313         pMSRRep->byAction = 1;
 314         pMSRRep->byDialogToken = ((PWLAN_FRAME_MSRREQ)
 315                 (pMgmt->abyCurrentMSRReq))->byDialogToken;
 316
 317         uLength = pMgmt->uLengthOfRepEIDs + offsetof(WLAN_FRAME_MSRREP,
 318                                                      sMSRRepEIDs);
 319
 320         pTxPacket->cbMPDULen = uLength;
 321         pTxPacket->cbPayloadLen = uLength - WLAN_HDR_ADDR3_LEN;
 322         if (csMgmt_xmit(pMgmt->pAdapter, pTxPacket) != CMD_STATUS_PENDING)
 323                 return false;
 324         return true;
 325 /*    return (CARDbSendPacket(pMgmt->pAdapter, pMSRRep, PKT_TYPE_802_11_MNG,
 326 uLength)); */
 327
 328 }
 329