release/src-rt-6.x.4708/linux/linux-2.6.36/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     }
 110     uNumOfEIDs = ((uLength - offsetof(WLAN_FRAME_MSRREQ, sMSRReqEIDs))/ (sizeof(WLAN_IE_MEASURE_REQ)));
 111     pMgmt->pCurrMeasureEIDRep = &(((PWLAN_FRAME_MSRREP) (pMgmt->abyCurrentMSRRep))->sMSRRepEIDs[0]);
 112     pMgmt->uLengthOfRepEIDs = 0;
 113     bResult = CARDbStartMeasure(pMgmt->pAdapter,
 114                                 ((PWLAN_FRAME_MSRREQ) (pMgmt->abyCurrentMSRReq))->sMSRReqEIDs,
 115                                 uNumOfEIDs
 116                                 );
 117     return (bResult);
 118 }
 119
 120
 121 static bool s_bRxTPCReq(PSMgmtObject pMgmt, PWLAN_FRAME_TPCREQ pTPCReq, unsigned char byRate, unsigned char byRSSI)
 122 {
 123     PWLAN_FRAME_TPCREP  pFrame;
 124     PSTxMgmtPacket      pTxPacket = NULL;
 125
 126
 127     pTxPacket = (PSTxMgmtPacket)pMgmt->pbyMgmtPacketPool;
 128     memset(pTxPacket, 0, sizeof(STxMgmtPacket) + WLAN_A3FR_MAXLEN);
 129     pTxPacket->p80211Header = (PUWLAN_80211HDR)((unsigned char *)pTxPacket + sizeof(STxMgmtPacket));
 130
 131     pFrame = (PWLAN_FRAME_TPCREP)((unsigned char *)pTxPacket + sizeof(STxMgmtPacket));
 132
 133     pFrame->Header.wFrameCtl = (   WLAN_SET_FC_FTYPE(WLAN_FTYPE_MGMT) |
 134                                     WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_ACTION)
 135                                 );
 136
 137     memcpy( pFrame->Header.abyAddr1, pTPCReq->Header.abyAddr2, WLAN_ADDR_LEN);
 138     memcpy( pFrame->Header.abyAddr2, CARDpGetCurrentAddress(pMgmt->pAdapter), WLAN_ADDR_LEN);
 139     memcpy( pFrame->Header.abyAddr3, pMgmt->abyCurrBSSID, WLAN_BSSID_LEN);
 140
 141     pFrame->byCategory = 0;
 142     pFrame->byAction = 3;
 143     pFrame->byDialogToken = ((PWLAN_FRAME_MSRREQ) (pMgmt->abyCurrentMSRReq))->byDialogToken;
 144
 145     pFrame->sTPCRepEIDs.byElementID = WLAN_EID_TPC_REP;
 146     pFrame->sTPCRepEIDs.len = 2;
 147     pFrame->sTPCRepEIDs.byTxPower = CARDbyGetTransmitPower(pMgmt->pAdapter);
 148     switch (byRate) {
 149         case RATE_54M:
 150             pFrame->sTPCRepEIDs.byLinkMargin = 65 - byRSSI;
 151             break;
 152         case RATE_48M:
 153             pFrame->sTPCRepEIDs.byLinkMargin = 66 - byRSSI;
 154             break;
 155         case RATE_36M:
 156             pFrame->sTPCRepEIDs.byLinkMargin = 70 - byRSSI;
 157             break;
 158         case RATE_24M:
 159             pFrame->sTPCRepEIDs.byLinkMargin = 74 - byRSSI;
 160             break;
 161         case RATE_18M:
 162             pFrame->sTPCRepEIDs.byLinkMargin = 77 - byRSSI;
 163             break;
 164         case RATE_12M:
 165             pFrame->sTPCRepEIDs.byLinkMargin = 79 - byRSSI;
 166             break;
 167         case RATE_9M:
 168             pFrame->sTPCRepEIDs.byLinkMargin = 81 - byRSSI;
 169             break;
 170         case RATE_6M:
 171         default:
 172             pFrame->sTPCRepEIDs.byLinkMargin = 82 - byRSSI;
 173             break;
 174     }
 175
 176     pTxPacket->cbMPDULen = sizeof(WLAN_FRAME_TPCREP);
 177     pTxPacket->cbPayloadLen = sizeof(WLAN_FRAME_TPCREP) - WLAN_HDR_ADDR3_LEN;
 178     if (csMgmt_xmit(pMgmt->pAdapter, pTxPacket) != CMD_STATUS_PENDING)
 179         return (false);
 180     return (true);
 181 //    return (CARDbSendPacket(pMgmt->pAdapter, pFrame, PKT_TYPE_802_11_MNG, sizeof(WLAN_FRAME_TPCREP)));
 182
 183 }
 184
 185
 186 /*---------------------  Export Variables  --------------------------*/
 187
 188 /*---------------------  Export Functions  --------------------------*/
 189
 190
 191 /*+
 192  *
 193  * Description:
 194  *      Handles action management frames.
 195  *
 196  * Parameters:
 197  *  In:
 198  *      pMgmt           - Management Object structure
 199  *      pRxPacket       - Received packet
 200  *  Out:
 201  *      none
 202  *
 203  * Return Value: None.
 204  *
 205 -*/
 206 bool
 207 IEEE11hbMgrRxAction (
 208     void *pMgmtHandle,
 209     void *pRxPacket
 210     )
 211 {
 212     PSMgmtObject            pMgmt = (PSMgmtObject) pMgmtHandle;
 213     PWLAN_FRAME_ACTION      pAction = NULL;
 214     unsigned int uLength = 0;
 215     PWLAN_IE_CH_SW          pChannelSwitch = NULL;
 216
 217
 218     // decode the frame
 219     uLength = ((PSRxMgmtPacket)pRxPacket)->cbMPDULen;
 220     if (uLength > WLAN_A3FR_MAXLEN) {
 221         return (false);
 222     }
 223
 224
 225     pAction = (PWLAN_FRAME_ACTION) (((PSRxMgmtPacket)pRxPacket)->p80211Header);
 226
 227     if (pAction->byCategory == 0) {
 228         switch (pAction->byAction) {
 229             case ACTION_MSRREQ:
 230                 return (s_bRxMSRReq(pMgmt, (PWLAN_FRAME_MSRREQ) pAction, uLength));
 231                 break;
 232             case ACTION_MSRREP:
 233                 break;
 234             case ACTION_TPCREQ:
 235                 return (s_bRxTPCReq(pMgmt,
 236                                     (PWLAN_FRAME_TPCREQ) pAction,
 237                                     ((PSRxMgmtPacket)pRxPacket)->byRxRate,
 238                                     (unsigned char) ((PSRxMgmtPacket)pRxPacket)->uRSSI));
 239                 break;
 240             case ACTION_TPCREP:
 241                 break;
 242             case ACTION_CHSW:
 243                 pChannelSwitch = (PWLAN_IE_CH_SW) (pAction->abyVars);
 244                 if ((pChannelSwitch->byElementID == WLAN_EID_CH_SWITCH) &&
 245                     (pChannelSwitch->len == 3)) {
 246                     // valid element id
 247                     CARDbChannelSwitch( pMgmt->pAdapter,
 248                                         pChannelSwitch->byMode,
 249                                         get_channel_mapping(pMgmt->pAdapter, pChannelSwitch->byChannel, pMgmt->eCurrentPHYMode),
 250                                         pChannelSwitch->byCount
 251                                         );
 252                 }
 253                 break;
 254             default:
 255                 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Unknown Action = %d\n", pAction->byAction);
 256                 break;
 257         }
 258     } else {
 259         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Unknown Category = %d\n", pAction->byCategory);
 260         pAction->byCategory |= 0x80;
 261
 262        //return (CARDbSendPacket(pMgmt->pAdapter, pAction, PKT_TYPE_802_11_MNG, uLength));
 263         return (true);
 264     }
 265     return (true);
 266 }
 267
 268
 269 bool IEEE11hbMSRRepTx (
 270     void *pMgmtHandle
 271     )
 272 {
 273     PSMgmtObject            pMgmt = (PSMgmtObject) pMgmtHandle;
 274     PWLAN_FRAME_MSRREP      pMSRRep = (PWLAN_FRAME_MSRREP) (pMgmt->abyCurrentMSRRep + sizeof(STxMgmtPacket));
 275     size_t                    uLength = 0;
 276     PSTxMgmtPacket          pTxPacket = NULL;
 277
 278     pTxPacket = (PSTxMgmtPacket)pMgmt->abyCurrentMSRRep;
 279     memset(pTxPacket, 0, sizeof(STxMgmtPacket) + WLAN_A3FR_MAXLEN);
 280     pTxPacket->p80211Header = (PUWLAN_80211HDR)((unsigned char *)pTxPacket + sizeof(STxMgmtPacket));
 281
 282
 283     pMSRRep->Header.wFrameCtl = (   WLAN_SET_FC_FTYPE(WLAN_FTYPE_MGMT) |
 284                                     WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_ACTION)
 285                                 );
 286
 287     memcpy( pMSRRep->Header.abyAddr1, ((PWLAN_FRAME_MSRREQ) (pMgmt->abyCurrentMSRReq))->Header.abyAddr2, WLAN_ADDR_LEN);
 288     memcpy( pMSRRep->Header.abyAddr2, CARDpGetCurrentAddress(pMgmt->pAdapter), WLAN_ADDR_LEN);
 289     memcpy( pMSRRep->Header.abyAddr3, pMgmt->abyCurrBSSID, WLAN_BSSID_LEN);
 290
 291     pMSRRep->byCategory = 0;
 292     pMSRRep->byAction = 1;
 293     pMSRRep->byDialogToken = ((PWLAN_FRAME_MSRREQ) (pMgmt->abyCurrentMSRReq))->byDialogToken;
 294
 295     uLength = pMgmt->uLengthOfRepEIDs + offsetof(WLAN_FRAME_MSRREP, sMSRRepEIDs);
 296
 297     pTxPacket->cbMPDULen = uLength;
 298     pTxPacket->cbPayloadLen = uLength - WLAN_HDR_ADDR3_LEN;
 299     if (csMgmt_xmit(pMgmt->pAdapter, pTxPacket) != CMD_STATUS_PENDING)
 300         return (false);
 301     return (true);
 302 //    return (CARDbSendPacket(pMgmt->pAdapter, pMSRRep, PKT_TYPE_802_11_MNG, uLength));
 303
 304 }