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 static bool s_bRxTPCReq(PSMgmtObject pMgmt,
 124                         PWLAN_FRAME_TPCREQ pTPCReq,
 125                         unsigned char byRate,
 126                         unsigned char byRSSI)
 127 {
 128         PWLAN_FRAME_TPCREP  pFrame;
 129         PSTxMgmtPacket      pTxPacket = NULL;
 130
 131         pTxPacket = (PSTxMgmtPacket)pMgmt->pbyMgmtPacketPool;
 132         memset(pTxPacket, 0, sizeof(STxMgmtPacket) + WLAN_A3FR_MAXLEN);
 133         pTxPacket->p80211Header = (PUWLAN_80211HDR)((unsigned char *)pTxPacket +
 134                                                     sizeof(STxMgmtPacket));
 135
 136         pFrame = (PWLAN_FRAME_TPCREP)((unsigned char *)pTxPacket +
 137                                       sizeof(STxMgmtPacket));
 138
 139         pFrame->Header.wFrameCtl = (WLAN_SET_FC_FTYPE(WLAN_FTYPE_MGMT) |
 140                                     WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_ACTION)
 141 );
 142
 143         memcpy(pFrame->Header.abyAddr1,
 144                pTPCReq->Header.abyAddr2,
 145                WLAN_ADDR_LEN);
 146         memcpy(pFrame->Header.abyAddr2,
 147                CARDpGetCurrentAddress(pMgmt->pAdapter),
 148                WLAN_ADDR_LEN);
 149         memcpy(pFrame->Header.abyAddr3,
 150                pMgmt->abyCurrBSSID,
 151                WLAN_BSSID_LEN);
 152
 153         pFrame->byCategory = 0;
 154         pFrame->byAction = 3;
 155         pFrame->byDialogToken = ((PWLAN_FRAME_MSRREQ)
 156                                  (pMgmt->abyCurrentMSRReq))->byDialogToken;
 157
 158         pFrame->sTPCRepEIDs.byElementID = WLAN_EID_TPC_REP;
 159         pFrame->sTPCRepEIDs.len = 2;
 160         pFrame->sTPCRepEIDs.byTxPower = CARDbyGetTransmitPower(pMgmt->pAdapter);
 161         switch (byRate) {
 162         case RATE_54M:
 163                 pFrame->sTPCRepEIDs.byLinkMargin = 65 - byRSSI;
 164                 break;
 165         case RATE_48M:
 166                 pFrame->sTPCRepEIDs.byLinkMargin = 66 - byRSSI;
 167                 break;
 168         case RATE_36M:
 169                 pFrame->sTPCRepEIDs.byLinkMargin = 70 - byRSSI;
 170                 break;
 171         case RATE_24M:
 172                 pFrame->sTPCRepEIDs.byLinkMargin = 74 - byRSSI;
 173                 break;
 174         case RATE_18M:
 175                 pFrame->sTPCRepEIDs.byLinkMargin = 77 - byRSSI;
 176                 break;
 177         case RATE_12M:
 178                 pFrame->sTPCRepEIDs.byLinkMargin = 79 - byRSSI;
 179                 break;
 180         case RATE_9M:
 181                 pFrame->sTPCRepEIDs.byLinkMargin = 81 - byRSSI;
 182                 break;
 183         case RATE_6M:
 184         default:
 185                 pFrame->sTPCRepEIDs.byLinkMargin = 82 - byRSSI;
 186                 break;
 187         }
 188
 189         pTxPacket->cbMPDULen = sizeof(WLAN_FRAME_TPCREP);
 190         pTxPacket->cbPayloadLen = sizeof(WLAN_FRAME_TPCREP) -
 191                 WLAN_HDR_ADDR3_LEN;
 192         if (csMgmt_xmit(pMgmt->pAdapter, pTxPacket) != CMD_STATUS_PENDING)
 193                 return false;
 194         return true;
 195 }
 196
 197 /*---------------------  Export Variables  --------------------------*/
 198
 199 /*---------------------  Export Functions  --------------------------*/
 200
 201 /*+
 202  *
 203  * Description:
 204  *      Handles action management frames.
 205  *
 206  * Parameters:
 207  *  In:
 208  *      pMgmt           - Management Object structure
 209  *      pRxPacket       - Received packet
 210  *  Out:
 211  *      none
 212  *
 213  * Return Value: None.
 214  *
 215  -*/
 216 bool
 217 IEEE11hbMgrRxAction(void *pMgmtHandle, void *pRxPacket)
 218 {
 219         PSMgmtObject            pMgmt = (PSMgmtObject) pMgmtHandle;
 220         PWLAN_FRAME_ACTION      pAction = NULL;
 221         unsigned int uLength = 0;
 222         PWLAN_IE_CH_SW          pChannelSwitch = NULL;
 223
 224         /* decode the frame */
 225         uLength = ((PSRxMgmtPacket)pRxPacket)->cbMPDULen;
 226         if (uLength > WLAN_A3FR_MAXLEN)
 227                 return false;
 228
 229         pAction = (PWLAN_FRAME_ACTION)
 230                 (((PSRxMgmtPacket)pRxPacket)->p80211Header);
 231
 232         if (pAction->byCategory == 0) {
 233                 switch (pAction->byAction) {
 234                 case ACTION_MSRREQ:
 235                         return s_bRxMSRReq(pMgmt,
 236                                            (PWLAN_FRAME_MSRREQ)
 237                                            pAction,
 238                                            uLength);
 239                         break;
 240                 case ACTION_MSRREP:
 241                         break;
 242                 case ACTION_TPCREQ:
 243                         return s_bRxTPCReq(pMgmt,
 244                                            (PWLAN_FRAME_TPCREQ) pAction,
 245                                            ((PSRxMgmtPacket)pRxPacket)->byRxRate,
 246                                            (unsigned char)
 247                                            ((PSRxMgmtPacket)pRxPacket)->uRSSI);
 248                         break;
 249                 case ACTION_TPCREP:
 250                         break;
 251                 case ACTION_CHSW:
 252                         pChannelSwitch = (PWLAN_IE_CH_SW) (pAction->abyVars);
 253                         if ((pChannelSwitch->byElementID == WLAN_EID_CH_SWITCH)
 254                             && (pChannelSwitch->len == 3)) {
 255                                 /* valid element id */
 256                                 CARDbChannelSwitch(pMgmt->pAdapter,
 257                                                    pChannelSwitch->byMode,
 258                                                    get_channel_mapping(pMgmt->pAdapter,
 259                                                                        pChannelSwitch->byChannel,
 260                                                                        pMgmt->eCurrentPHYMode),
 261                                                    pChannelSwitch->byCount);
 262                         }
 263                         break;
 264                 default:
 265                         DBG_PRT(MSG_LEVEL_DEBUG,
 266                                 KERN_INFO "Unknown Action = %d\n",
 267                                 pAction->byAction);
 268                         break;
 269                 }
 270         } else {
 271                 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Unknown Category = %d\n",
 272                         pAction->byCategory);
 273                 pAction->byCategory |= 0x80;
 274
 275                 return true;
 276         }
 277         return true;
 278 }
 279
 280 bool IEEE11hbMSRRepTx(void *pMgmtHandle)
 281 {
 282         PSMgmtObject            pMgmt = (PSMgmtObject) pMgmtHandle;
 283         PWLAN_FRAME_MSRREP      pMSRRep = (PWLAN_FRAME_MSRREP)
 284                 (pMgmt->abyCurrentMSRRep + sizeof(STxMgmtPacket));
 285         size_t                    uLength = 0;
 286         PSTxMgmtPacket          pTxPacket = NULL;
 287
 288         pTxPacket = (PSTxMgmtPacket)pMgmt->abyCurrentMSRRep;
 289         memset(pTxPacket, 0, sizeof(STxMgmtPacket) + WLAN_A3FR_MAXLEN);
 290         pTxPacket->p80211Header = (PUWLAN_80211HDR)((unsigned char *)pTxPacket +
 291                                                     sizeof(STxMgmtPacket));
 292
 293         pMSRRep->Header.wFrameCtl = (WLAN_SET_FC_FTYPE(WLAN_FTYPE_MGMT) |
 294                                      WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_ACTION)
 295 );
 296
 297         memcpy(pMSRRep->Header.abyAddr1, ((PWLAN_FRAME_MSRREQ)
 298                                           (pMgmt->abyCurrentMSRReq))->Header.abyAddr2, WLAN_ADDR_LEN);
 299         memcpy(pMSRRep->Header.abyAddr2,
 300                CARDpGetCurrentAddress(pMgmt->pAdapter), WLAN_ADDR_LEN);
 301         memcpy(pMSRRep->Header.abyAddr3, pMgmt->abyCurrBSSID, WLAN_BSSID_LEN);
 302
 303         pMSRRep->byCategory = 0;
 304         pMSRRep->byAction = 1;
 305         pMSRRep->byDialogToken = ((PWLAN_FRAME_MSRREQ)
 306                                   (pMgmt->abyCurrentMSRReq))->byDialogToken;
 307
 308         uLength = pMgmt->uLengthOfRepEIDs + offsetof(WLAN_FRAME_MSRREP,
 309                                                      sMSRRepEIDs);
 310
 311         pTxPacket->cbMPDULen = uLength;
 312         pTxPacket->cbPayloadLen = uLength - WLAN_HDR_ADDR3_LEN;
 313         if (csMgmt_xmit(pMgmt->pAdapter, pTxPacket) != CMD_STATUS_PENDING)
 314                 return false;
 315         return true;
 316 }