drivers/staging/rtl8192su/ieee80211/rtl819x_BAProc.c

   1 /********************************************************************************************************************************
   2  * This file is created to process BA Action Frame. According to 802.11 spec, there are 3 BA action types at all. And as BA is
   3  * related to TS, this part need some struture defined in QOS side code. Also TX RX is going to be resturctured, so how to send
   4  * ADDBAREQ ADDBARSP and DELBA packet is still on consideration. Temporarily use MANAGE QUEUE instead of Normal Queue.
   5  * WB 2008-05-27
   6  * *****************************************************************************************************************************/
   7 #include "ieee80211.h"
   8 #include "rtl819x_BA.h"
   9
  10 /********************************************************************************************************************
  11  *function:  Activate BA entry. And if Time is nozero, start timer.
  12  *   input:  PBA_RECORD                 pBA  //BA entry to be enabled
  13  *           u16                        Time //indicate time delay.
  14  *  output:  none
  15 ********************************************************************************************************************/
  16 void ActivateBAEntry(struct ieee80211_device* ieee, PBA_RECORD pBA, u16 Time)
  17 {
  18         pBA->bValid = true;
  19         if(Time != 0)
  20                 mod_timer(&pBA->Timer, jiffies + MSECS(Time));
  21 }
  22
  23 /********************************************************************************************************************
  24  *function:  deactivate BA entry, including its timer.
  25  *   input:  PBA_RECORD                 pBA  //BA entry to be disabled
  26  *  output:  none
  27 ********************************************************************************************************************/
  28 void DeActivateBAEntry( struct ieee80211_device* ieee, PBA_RECORD pBA)
  29 {
  30         pBA->bValid = false;
  31         del_timer_sync(&pBA->Timer);
  32 }
  33 /********************************************************************************************************************
  34  *function: deactivete BA entry in Tx Ts, and send DELBA.
  35  *   input:
  36  *           PTX_TS_RECORD              pTxTs //Tx Ts which is to deactivate BA entry.
  37  *  output:  none
  38  *  notice:  As PTX_TS_RECORD structure will be defined in QOS, so wait to be merged. //FIXME
  39 ********************************************************************************************************************/
  40 u8 TxTsDeleteBA( struct ieee80211_device* ieee, PTX_TS_RECORD   pTxTs)
  41 {
  42         PBA_RECORD              pAdmittedBa = &pTxTs->TxAdmittedBARecord;  //These two BA entries must exist in TS structure
  43         PBA_RECORD              pPendingBa = &pTxTs->TxPendingBARecord;
  44         u8                      bSendDELBA = false;
  45
  46         // Delete pending BA
  47         if(pPendingBa->bValid)
  48         {
  49                 DeActivateBAEntry(ieee, pPendingBa);
  50                 bSendDELBA = true;
  51         }
  52
  53         // Delete admitted BA
  54         if(pAdmittedBa->bValid)
  55         {
  56                 DeActivateBAEntry(ieee, pAdmittedBa);
  57                 bSendDELBA = true;
  58         }
  59
  60         return bSendDELBA;
  61 }
  62
  63 /********************************************************************************************************************
  64  *function: deactivete BA entry in Tx Ts, and send DELBA.
  65  *   input:
  66  *           PRX_TS_RECORD              pRxTs //Rx Ts which is to deactivate BA entry.
  67  *  output:  none
  68  *  notice:  As PRX_TS_RECORD structure will be defined in QOS, so wait to be merged. //FIXME, same with above
  69 ********************************************************************************************************************/
  70 u8 RxTsDeleteBA( struct ieee80211_device* ieee, PRX_TS_RECORD   pRxTs)
  71 {
  72         PBA_RECORD              pBa = &pRxTs->RxAdmittedBARecord;
  73         u8                      bSendDELBA = false;
  74
  75         if(pBa->bValid)
  76         {
  77                 DeActivateBAEntry(ieee, pBa);
  78                 bSendDELBA = true;
  79         }
  80
  81         return bSendDELBA;
  82 }
  83
  84 /********************************************************************************************************************
  85  *function: reset BA entry
  86  *   input:
  87  *           PBA_RECORD         pBA //entry to be reset
  88  *  output:  none
  89 ********************************************************************************************************************/
  90 void ResetBaEntry( PBA_RECORD pBA)
  91 {
  92         pBA->bValid                     = false;
  93         pBA->BaParamSet.shortData       = 0;
  94         pBA->BaTimeoutValue             = 0;
  95         pBA->DialogToken                = 0;
  96         pBA->BaStartSeqCtrl.ShortData   = 0;
  97 }
  98 //These functions need porting here or not?
  99 /*******************************************************************************************************************************
 100  *function:  construct ADDBAREQ and ADDBARSP frame here together.
 101  *   input:  u8*                Dst     //ADDBA frame's destination
 102  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA.
 103  *           u16                StatusCode  //status code in RSP and I will use it to indicate whether it's RSP or REQ(will I?)
 104  *           u8                 type    //indicate whether it's RSP(ACT_ADDBARSP) ow REQ(ACT_ADDBAREQ)
 105  *  output:  none
 106  *  return:  sk_buff*           skb     //return constructed skb to xmit
 107 *******************************************************************************************************************************/
 108 static struct sk_buff* ieee80211_ADDBA(struct ieee80211_device* ieee, u8* Dst, PBA_RECORD pBA, u16 StatusCode, u8 type)
 109 {
 110         struct sk_buff *skb = NULL;
 111          struct ieee80211_hdr_3addr* BAReq = NULL;
 112         u8* tag = NULL;
 113         u16 tmp = 0;
 114         u16 len = ieee->tx_headroom + 9;
 115         //category(1) + action field(1) + Dialog Token(1) + BA Parameter Set(2) +  BA Timeout Value(2) +  BA Start SeqCtrl(2)(or StatusCode(2))
 116         IEEE80211_DEBUG(IEEE80211_DL_TRACE | IEEE80211_DL_BA, "========>%s(), frame(%d) sentd to:"MAC_FMT", ieee->dev:%p\n", __FUNCTION__, type, MAC_ARG(Dst), ieee->dev);
 117         if (pBA == NULL||ieee == NULL)
 118         {
 119                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "pBA(%p) is NULL or ieee(%p) is NULL\n", pBA, ieee);
 120                 return NULL;
 121         }
 122         skb = dev_alloc_skb(len + sizeof( struct ieee80211_hdr_3addr)); //need to add something others? FIXME
 123         if (skb == NULL)
 124         {
 125                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't alloc skb for ADDBA_REQ\n");
 126                 return NULL;
 127         }
 128
 129         memset(skb->data, 0, sizeof( struct ieee80211_hdr_3addr));      //I wonder whether it's necessary. Apparently kernel will not do it when alloc a skb.
 130         skb_reserve(skb, ieee->tx_headroom);
 131
 132         BAReq = ( struct ieee80211_hdr_3addr *) skb_put(skb,sizeof( struct ieee80211_hdr_3addr));
 133
 134         memcpy(BAReq->addr1, Dst, ETH_ALEN);
 135         memcpy(BAReq->addr2, ieee->dev->dev_addr, ETH_ALEN);
 136
 137         memcpy(BAReq->addr3, ieee->current_network.bssid, ETH_ALEN);
 138
 139         BAReq->frame_ctl = cpu_to_le16(IEEE80211_STYPE_MANAGE_ACT); //action frame
 140
 141         //tag += sizeof( struct ieee80211_hdr_3addr); //move to action field
 142         tag = (u8*)skb_put(skb, 9);
 143         *tag ++= ACT_CAT_BA;
 144         *tag ++= type;
 145         // Dialog Token
 146         *tag ++= pBA->DialogToken;
 147
 148         if (ACT_ADDBARSP == type)
 149         {
 150                 // Status Code
 151                 printk("=====>to send ADDBARSP\n");
 152                 tmp = cpu_to_le16(StatusCode);
 153                 memcpy(tag, (u8*)&tmp, 2);
 154                 tag += 2;
 155         }
 156         // BA Parameter Set
 157         tmp = cpu_to_le16(pBA->BaParamSet.shortData);
 158         memcpy(tag, (u8*)&tmp, 2);
 159         tag += 2;
 160         // BA Timeout Value
 161         tmp = cpu_to_le16(pBA->BaTimeoutValue);
 162         memcpy(tag, (u8*)&tmp, 2);
 163         tag += 2;
 164
 165         if (ACT_ADDBAREQ == type)
 166         {
 167         // BA Start SeqCtrl
 168                 memcpy(tag,(u8*)&(pBA->BaStartSeqCtrl), 2);
 169                 tag += 2;
 170         }
 171
 172         IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA|IEEE80211_DL_BA, skb->data, skb->len);
 173         return skb;
 174         //return NULL;
 175 }
 176
 177 /********************************************************************************************************************
 178  *function:  construct DELBA frame
 179  *   input:  u8*                dst     //DELBA frame's destination
 180  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA
 181  *           TR_SELECT          TxRxSelect  //TX RX direction
 182  *           u16                ReasonCode  //status code.
 183  *  output:  none
 184  *  return:  sk_buff*           skb     //return constructed skb to xmit
 185 ********************************************************************************************************************/
 186 static struct sk_buff* ieee80211_DELBA(
 187         struct ieee80211_device* ieee,
 188         u8*                      dst,
 189         PBA_RECORD               pBA,
 190         TR_SELECT                TxRxSelect,
 191         u16                      ReasonCode
 192         )
 193 {
 194         DELBA_PARAM_SET DelbaParamSet;
 195         struct sk_buff *skb = NULL;
 196          struct ieee80211_hdr_3addr* Delba = NULL;
 197         u8* tag = NULL;
 198         u16 tmp = 0;
 199         //len = head len + DELBA Parameter Set(2) + Reason Code(2)
 200         u16 len = 6 + ieee->tx_headroom;
 201
 202         if (net_ratelimit())
 203         IEEE80211_DEBUG(IEEE80211_DL_TRACE | IEEE80211_DL_BA, "========>%s(), ReasonCode(%d) sentd to:"MAC_FMT"\n", __FUNCTION__, ReasonCode, MAC_ARG(dst));
 204
 205         memset(&DelbaParamSet, 0, 2);
 206
 207         DelbaParamSet.field.Initiator   = (TxRxSelect==TX_DIR)?1:0;
 208         DelbaParamSet.field.TID = pBA->BaParamSet.field.TID;
 209
 210         skb = dev_alloc_skb(len + sizeof( struct ieee80211_hdr_3addr)); //need to add something others? FIXME
 211         if (skb == NULL)
 212         {
 213                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't alloc skb for ADDBA_REQ\n");
 214                 return NULL;
 215         }
 216 //      memset(skb->data, 0, len+sizeof( struct ieee80211_hdr_3addr));
 217         skb_reserve(skb, ieee->tx_headroom);
 218
 219         Delba = ( struct ieee80211_hdr_3addr *) skb_put(skb,sizeof( struct ieee80211_hdr_3addr));
 220
 221         memcpy(Delba->addr1, dst, ETH_ALEN);
 222         memcpy(Delba->addr2, ieee->dev->dev_addr, ETH_ALEN);
 223         memcpy(Delba->addr3, ieee->current_network.bssid, ETH_ALEN);
 224         Delba->frame_ctl = cpu_to_le16(IEEE80211_STYPE_MANAGE_ACT); //action frame
 225
 226         tag = (u8*)skb_put(skb, 6);
 227
 228         *tag ++= ACT_CAT_BA;
 229         *tag ++= ACT_DELBA;
 230
 231         // DELBA Parameter Set
 232         tmp = cpu_to_le16(DelbaParamSet.shortData);
 233         memcpy(tag, (u8*)&tmp, 2);
 234         tag += 2;
 235         // Reason Code
 236         tmp = cpu_to_le16(ReasonCode);
 237         memcpy(tag, (u8*)&tmp, 2);
 238         tag += 2;
 239
 240         IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA|IEEE80211_DL_BA, skb->data, skb->len);
 241         if (net_ratelimit())
 242         IEEE80211_DEBUG(IEEE80211_DL_TRACE | IEEE80211_DL_BA, "<=====%s()\n", __FUNCTION__);
 243         return skb;
 244 }
 245
 246 /********************************************************************************************************************
 247  *function: send ADDBAReq frame out
 248  *   input:  u8*                dst     //ADDBAReq frame's destination
 249  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA
 250  *  output:  none
 251  *  notice: If any possible, please hide pBA in ieee. And temporarily use Manage Queue as softmac_mgmt_xmit() usually does
 252 ********************************************************************************************************************/
 253 void ieee80211_send_ADDBAReq(struct ieee80211_device* ieee, u8* dst, PBA_RECORD pBA)
 254 {
 255         struct sk_buff *skb = NULL;
 256         skb = ieee80211_ADDBA(ieee, dst, pBA, 0, ACT_ADDBAREQ); //construct ACT_ADDBAREQ frames so set statuscode zero.
 257
 258         if (skb)
 259         {
 260                 softmac_mgmt_xmit(skb, ieee);
 261                 //add statistic needed here.
 262                 //and skb will be freed in softmac_mgmt_xmit(), so omit all dev_kfree_skb_any() outside softmac_mgmt_xmit()
 263                 //WB
 264         }
 265         else
 266         {
 267                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "alloc skb error in function %s()\n", __FUNCTION__);
 268         }
 269         return;
 270 }
 271
 272 /********************************************************************************************************************
 273  *function: send ADDBARSP frame out
 274  *   input:  u8*                dst     //DELBA frame's destination
 275  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA
 276  *           u16                StatusCode //RSP StatusCode
 277  *  output:  none
 278  *  notice: If any possible, please hide pBA in ieee. And temporarily use Manage Queue as softmac_mgmt_xmit() usually does
 279 ********************************************************************************************************************/
 280 void ieee80211_send_ADDBARsp(struct ieee80211_device* ieee, u8* dst, PBA_RECORD pBA, u16 StatusCode)
 281 {
 282         struct sk_buff *skb = NULL;
 283         skb = ieee80211_ADDBA(ieee, dst, pBA, StatusCode, ACT_ADDBARSP); //construct ACT_ADDBARSP frames
 284         if (skb)
 285         {
 286                 softmac_mgmt_xmit(skb, ieee);
 287                 //same above
 288         }
 289         else
 290         {
 291                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "alloc skb error in function %s()\n", __FUNCTION__);
 292         }
 293
 294         return;
 295
 296 }
 297 /********************************************************************************************************************
 298  *function: send ADDBARSP frame out
 299  *   input:  u8*                dst     //DELBA frame's destination
 300  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA
 301  *           TR_SELECT          TxRxSelect //TX or RX
 302  *           u16                ReasonCode //DEL ReasonCode
 303  *  output:  none
 304  *  notice: If any possible, please hide pBA in ieee. And temporarily use Manage Queue as softmac_mgmt_xmit() usually does
 305 ********************************************************************************************************************/
 306
 307 void ieee80211_send_DELBA(struct ieee80211_device* ieee, u8* dst, PBA_RECORD pBA, TR_SELECT TxRxSelect, u16 ReasonCode)
 308 {
 309         struct sk_buff *skb = NULL;
 310         skb = ieee80211_DELBA(ieee, dst, pBA, TxRxSelect, ReasonCode); //construct ACT_ADDBARSP frames
 311         if (skb)
 312         {
 313                 softmac_mgmt_xmit(skb, ieee);
 314                 //same above
 315         }
 316         else
 317         {
 318                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "alloc skb error in function %s()\n", __FUNCTION__);
 319         }
 320         return ;
 321 }
 322
 323 /********************************************************************************************************************
 324  *function: RX ADDBAReq
 325  *   input:  struct sk_buff *   skb     //incoming ADDBAReq skb.
 326  *  return:  0(pass), other(fail)
 327  *  notice:  As this function need support of QOS, I comment some code out. And when qos is ready, this code need to be support.
 328 ********************************************************************************************************************/
 329 int ieee80211_rx_ADDBAReq( struct ieee80211_device* ieee, struct sk_buff *skb)
 330 {
 331          struct ieee80211_hdr_3addr* req = NULL;
 332         u16 rc = 0;
 333         u8 * dst = NULL, *pDialogToken = NULL, *tag = NULL;
 334         PBA_RECORD pBA = NULL;
 335         PBA_PARAM_SET   pBaParamSet = NULL;
 336         u16* pBaTimeoutVal = NULL;
 337         PSEQUENCE_CONTROL pBaStartSeqCtrl = NULL;
 338         PRX_TS_RECORD   pTS = NULL;
 339
 340         if (skb->len < sizeof( struct ieee80211_hdr_3addr) + 9)
 341         {
 342                 IEEE80211_DEBUG(IEEE80211_DL_ERR, " Invalid skb len in BAREQ(%d / %ld)\n", skb->len,    (sizeof( struct ieee80211_hdr_3addr) + 9));
 343                 return -1;
 344         }
 345
 346         IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA|IEEE80211_DL_BA, skb->data, skb->len);
 347
 348         req = ( struct ieee80211_hdr_3addr*) skb->data;
 349         tag = (u8*)req;
 350         dst = (u8*)(&req->addr2[0]);
 351         tag += sizeof( struct ieee80211_hdr_3addr);
 352         pDialogToken = tag + 2;  //category+action
 353         pBaParamSet = (PBA_PARAM_SET)(tag + 3);   //+DialogToken
 354         pBaTimeoutVal = (u16*)(tag + 5);
 355         pBaStartSeqCtrl = (PSEQUENCE_CONTROL)(req + 7);
 356
 357         printk("====================>rx ADDBAREQ from :"MAC_FMT"\n", MAC_ARG(dst));
 358 //some other capability is not ready now.
 359         if(     (ieee->current_network.qos_data.active == 0) ||
 360                 (ieee->pHTInfo->bCurrentHTSupport == false) ||
 361                 (ieee->pHTInfo->IOTAction & HT_IOT_ACT_REJECT_ADDBA_REQ)) //||
 362         //      (ieee->pStaQos->bEnableRxImmBA == false)        )
 363         {
 364                 rc = ADDBA_STATUS_REFUSED;
 365                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "Failed to reply on ADDBA_REQ as some capability is not ready(%d, %d)\n", ieee->current_network.qos_data.active, ieee->pHTInfo->bCurrentHTSupport);
 366                 goto OnADDBAReq_Fail;
 367         }
 368         // Search for related traffic stream.
 369         // If there is no matched TS, reject the ADDBA request.
 370         if(     !GetTs(
 371                         ieee,
 372                         (PTS_COMMON_INFO*)(&pTS),
 373                         dst,
 374                         (u8)(pBaParamSet->field.TID),
 375                         RX_DIR,
 376                         true)   )
 377         {
 378                 rc = ADDBA_STATUS_REFUSED;
 379                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't get TS in %s()\n", __FUNCTION__);
 380                 goto OnADDBAReq_Fail;
 381         }
 382         pBA = &pTS->RxAdmittedBARecord;
 383         // To Determine the ADDBA Req content
 384         // We can do much more check here, including BufferSize, AMSDU_Support, Policy, StartSeqCtrl...
 385         // I want to check StartSeqCtrl to make sure when we start aggregation!!!
 386         //
 387         if(pBaParamSet->field.BAPolicy == BA_POLICY_DELAYED)
 388         {
 389                 rc = ADDBA_STATUS_INVALID_PARAM;
 390                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "BA Policy is not correct in %s()\n", __FUNCTION__);
 391                 goto OnADDBAReq_Fail;
 392         }
 393                 // Admit the ADDBA Request
 394         //
 395         DeActivateBAEntry(ieee, pBA);
 396         pBA->DialogToken = *pDialogToken;
 397         pBA->BaParamSet = *pBaParamSet;
 398         pBA->BaTimeoutValue = *pBaTimeoutVal;
 399         pBA->BaStartSeqCtrl = *pBaStartSeqCtrl;
 400         //for half N mode we only aggregate 1 frame
 401         if (ieee->GetHalfNmodeSupportByAPsHandler(ieee->dev)||
 402         (ieee->pHTInfo->IOTAction & HT_IOT_ACT_ALLOW_PEER_AGG_ONE_PKT))
 403         pBA->BaParamSet.field.BufferSize = 1;
 404         else
 405         pBA->BaParamSet.field.BufferSize = 32;
 406         ActivateBAEntry(ieee, pBA, 0);//pBA->BaTimeoutValue);
 407         ieee80211_send_ADDBARsp(ieee, dst, pBA, ADDBA_STATUS_SUCCESS);
 408
 409         // End of procedure.
 410         return 0;
 411
 412 OnADDBAReq_Fail:
 413         {
 414                 BA_RECORD       BA;
 415                 BA.BaParamSet = *pBaParamSet;
 416                 BA.BaTimeoutValue = *pBaTimeoutVal;
 417                 BA.DialogToken = *pDialogToken;
 418                 BA.BaParamSet.field.BAPolicy = BA_POLICY_IMMEDIATE;
 419                 ieee80211_send_ADDBARsp(ieee, dst, &BA, rc);
 420                 return 0; //we send RSP out.
 421         }
 422
 423 }
 424
 425 /********************************************************************************************************************
 426  *function: RX ADDBARSP
 427  *   input:  struct sk_buff *   skb     //incoming ADDBAReq skb.
 428  *  return:  0(pass), other(fail)
 429  *  notice:  As this function need support of QOS, I comment some code out. And when qos is ready, this code need to be support.
 430 ********************************************************************************************************************/
 431 int ieee80211_rx_ADDBARsp( struct ieee80211_device* ieee, struct sk_buff *skb)
 432 {
 433          struct ieee80211_hdr_3addr* rsp = NULL;
 434         PBA_RECORD              pPendingBA, pAdmittedBA;
 435         PTX_TS_RECORD           pTS = NULL;
 436         u8* dst = NULL, *pDialogToken = NULL, *tag = NULL;
 437         u16* pStatusCode = NULL, *pBaTimeoutVal = NULL;
 438         PBA_PARAM_SET           pBaParamSet = NULL;
 439         u16                     ReasonCode;
 440
 441         if (skb->len < sizeof( struct ieee80211_hdr_3addr) + 9)
 442         {
 443                 IEEE80211_DEBUG(IEEE80211_DL_ERR, " Invalid skb len in BARSP(%d / %ld)\n", skb->len,    (sizeof( struct ieee80211_hdr_3addr) + 9));
 444                 return -1;
 445         }
 446         rsp = ( struct ieee80211_hdr_3addr*)skb->data;
 447         tag = (u8*)rsp;
 448         dst = (u8*)(&rsp->addr2[0]);
 449         tag += sizeof( struct ieee80211_hdr_3addr);
 450         pDialogToken = tag + 2;
 451         pStatusCode = (u16*)(tag + 3);
 452         pBaParamSet = (PBA_PARAM_SET)(tag + 5);
 453         pBaTimeoutVal = (u16*)(tag + 7);
 454
 455         // Check the capability
 456         // Since we can always receive A-MPDU, we just check if it is under HT mode.
 457         if(     ieee->current_network.qos_data.active == 0  ||
 458                 ieee->pHTInfo->bCurrentHTSupport == false ||
 459                 ieee->pHTInfo->bCurrentAMPDUEnable == false )
 460         {
 461                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "reject to ADDBA_RSP as some capability is not ready(%d, %d, %d)\n",ieee->current_network.qos_data.active, ieee->pHTInfo->bCurrentHTSupport, ieee->pHTInfo->bCurrentAMPDUEnable);
 462                 ReasonCode = DELBA_REASON_UNKNOWN_BA;
 463                 goto OnADDBARsp_Reject;
 464         }
 465
 466
 467         //
 468         // Search for related TS.
 469         // If there is no TS found, we wil reject ADDBA Rsp by sending DELBA frame.
 470         //
 471         if (!GetTs(
 472                         ieee,
 473                         (PTS_COMMON_INFO*)(&pTS),
 474                         dst,
 475                         (u8)(pBaParamSet->field.TID),
 476                         TX_DIR,
 477                         false)  )
 478         {
 479                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't get TS in %s()\n", __FUNCTION__);
 480                 ReasonCode = DELBA_REASON_UNKNOWN_BA;
 481                 goto OnADDBARsp_Reject;
 482         }
 483
 484         pTS->bAddBaReqInProgress = false;
 485         pPendingBA = &pTS->TxPendingBARecord;
 486         pAdmittedBA = &pTS->TxAdmittedBARecord;
 487
 488
 489         //
 490         // Check if related BA is waiting for setup.
 491         // If not, reject by sending DELBA frame.
 492         //
 493         if((pAdmittedBA->bValid==true))
 494         {
 495                 // Since BA is already setup, we ignore all other ADDBA Response.
 496                 IEEE80211_DEBUG(IEEE80211_DL_BA, "OnADDBARsp(): Recv ADDBA Rsp. Drop because already admit it! \n");
 497                 return -1;
 498         }
 499         else if((pPendingBA->bValid == false) ||(*pDialogToken != pPendingBA->DialogToken))
 500         {
 501                 IEEE80211_DEBUG(IEEE80211_DL_ERR,  "OnADDBARsp(): Recv ADDBA Rsp. BA invalid, DELBA! \n");
 502                 ReasonCode = DELBA_REASON_UNKNOWN_BA;
 503                 goto OnADDBARsp_Reject;
 504         }
 505         else
 506         {
 507                 IEEE80211_DEBUG(IEEE80211_DL_BA, "OnADDBARsp(): Recv ADDBA Rsp. BA is admitted! Status code:%X\n", *pStatusCode);
 508                 DeActivateBAEntry(ieee, pPendingBA);
 509         }
 510
 511
 512         if(*pStatusCode == ADDBA_STATUS_SUCCESS)
 513         {
 514                 //
 515                 // Determine ADDBA Rsp content here.
 516                 // We can compare the value of BA parameter set that Peer returned and Self sent.
 517                 // If it is OK, then admitted. Or we can send DELBA to cancel BA mechanism.
 518                 //
 519                 if(pBaParamSet->field.BAPolicy == BA_POLICY_DELAYED)
 520                 {
 521                         // Since this is a kind of ADDBA failed, we delay next ADDBA process.
 522                         pTS->bAddBaReqDelayed = true;
 523                         DeActivateBAEntry(ieee, pAdmittedBA);
 524                         ReasonCode = DELBA_REASON_END_BA;
 525                         goto OnADDBARsp_Reject;
 526                 }
 527
 528
 529                 //
 530                 // Admitted condition
 531                 //
 532                 pAdmittedBA->DialogToken = *pDialogToken;
 533                 pAdmittedBA->BaTimeoutValue = *pBaTimeoutVal;
 534                 pAdmittedBA->BaStartSeqCtrl = pPendingBA->BaStartSeqCtrl;
 535                 pAdmittedBA->BaParamSet = *pBaParamSet;
 536                 DeActivateBAEntry(ieee, pAdmittedBA);
 537                 ActivateBAEntry(ieee, pAdmittedBA, *pBaTimeoutVal);
 538         }
 539         else
 540         {
 541                 // Delay next ADDBA process.
 542                 pTS->bAddBaReqDelayed = true;
 543         }
 544
 545         // End of procedure
 546         return 0;
 547
 548 OnADDBARsp_Reject:
 549         {
 550                 BA_RECORD       BA;
 551                 BA.BaParamSet = *pBaParamSet;
 552                 ieee80211_send_DELBA(ieee, dst, &BA, TX_DIR, ReasonCode);
 553                 return 0;
 554         }
 555
 556 }
 557
 558 /********************************************************************************************************************
 559  *function: RX DELBA
 560  *   input:  struct sk_buff *   skb     //incoming ADDBAReq skb.
 561  *  return:  0(pass), other(fail)
 562  *  notice:  As this function need support of QOS, I comment some code out. And when qos is ready, this code need to be support.
 563 ********************************************************************************************************************/
 564 int ieee80211_rx_DELBA(struct ieee80211_device* ieee,struct sk_buff *skb)
 565 {
 566          struct ieee80211_hdr_3addr* delba = NULL;
 567         PDELBA_PARAM_SET        pDelBaParamSet = NULL;
 568         u16*                    pReasonCode = NULL;
 569         u8*                     dst = NULL;
 570
 571         if (skb->len < sizeof( struct ieee80211_hdr_3addr) + 6)
 572         {
 573                 IEEE80211_DEBUG(IEEE80211_DL_ERR, " Invalid skb len in DELBA(%d / %ld)\n", skb->len,    (sizeof( struct ieee80211_hdr_3addr) + 6));
 574                 return -1;
 575         }
 576
 577         if(ieee->current_network.qos_data.active == 0 ||
 578                 ieee->pHTInfo->bCurrentHTSupport == false )
 579         {
 580                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "received DELBA while QOS or HT is not supported(%d, %d)\n",ieee->current_network.qos_data.active, ieee->pHTInfo->bCurrentHTSupport);
 581                 return -1;
 582         }
 583
 584         IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA|IEEE80211_DL_BA, skb->data, skb->len);
 585         delba = ( struct ieee80211_hdr_3addr*)skb->data;
 586         dst = (u8*)(&delba->addr2[0]);
 587         delba += sizeof( struct ieee80211_hdr_3addr);
 588         pDelBaParamSet = (PDELBA_PARAM_SET)(delba+2);
 589         pReasonCode = (u16*)(delba+4);
 590
 591         if(pDelBaParamSet->field.Initiator == 1)
 592         {
 593                 PRX_TS_RECORD   pRxTs;
 594
 595                 if( !GetTs(
 596                                 ieee,
 597                                 (PTS_COMMON_INFO*)&pRxTs,
 598                                 dst,
 599                                 (u8)pDelBaParamSet->field.TID,
 600                                 RX_DIR,
 601                                 false)  )
 602                 {
 603                         IEEE80211_DEBUG(IEEE80211_DL_ERR,  "can't get TS for RXTS in %s()\n", __FUNCTION__);
 604                         return -1;
 605                 }
 606
 607                 RxTsDeleteBA(ieee, pRxTs);
 608         }
 609         else
 610         {
 611                 PTX_TS_RECORD   pTxTs;
 612
 613                 if(!GetTs(
 614                         ieee,
 615                         (PTS_COMMON_INFO*)&pTxTs,
 616                         dst,
 617                         (u8)pDelBaParamSet->field.TID,
 618                         TX_DIR,
 619                         false)  )
 620                 {
 621                         IEEE80211_DEBUG(IEEE80211_DL_ERR,  "can't get TS for TXTS in %s()\n", __FUNCTION__);
 622                         return -1;
 623                 }
 624
 625                 pTxTs->bUsingBa = false;
 626                 pTxTs->bAddBaReqInProgress = false;
 627                 pTxTs->bAddBaReqDelayed = false;
 628                 del_timer_sync(&pTxTs->TsAddBaTimer);
 629                 //PlatformCancelTimer(Adapter, &pTxTs->TsAddBaTimer);
 630                 TxTsDeleteBA(ieee, pTxTs);
 631         }
 632         return 0;
 633 }
 634
 635 //
 636 // ADDBA initiate. This can only be called by TX side.
 637 //
 638 void
 639 TsInitAddBA(
 640         struct ieee80211_device* ieee,
 641         PTX_TS_RECORD   pTS,
 642         u8              Policy,
 643         u8              bOverwritePending
 644         )
 645 {
 646         PBA_RECORD                      pBA = &pTS->TxPendingBARecord;
 647
 648         if(pBA->bValid==true && bOverwritePending==false)
 649                 return;
 650
 651         // Set parameters to "Pending" variable set
 652         DeActivateBAEntry(ieee, pBA);
 653
 654         pBA->DialogToken++;                                             // DialogToken: Only keep the latest dialog token
 655         pBA->BaParamSet.field.AMSDU_Support = 0;        // Do not support A-MSDU with A-MPDU now!!
 656         pBA->BaParamSet.field.BAPolicy = Policy;        // Policy: Delayed or Immediate
 657         pBA->BaParamSet.field.TID = pTS->TsCommonInfo.TSpec.f.TSInfo.field.ucTSID;      // TID
 658         // BufferSize: This need to be set according to A-MPDU vector
 659         pBA->BaParamSet.field.BufferSize = 32;          // BufferSize: This need to be set according to A-MPDU vector
 660         pBA->BaTimeoutValue = 0;                                        // Timeout value: Set 0 to disable Timer
 661         pBA->BaStartSeqCtrl.field.SeqNum = (pTS->TxCurSeq + 3) % 4096;  // Block Ack will start after 3 packets later.
 662
 663         ActivateBAEntry(ieee, pBA, BA_SETUP_TIMEOUT);
 664
 665         ieee80211_send_ADDBAReq(ieee, pTS->TsCommonInfo.Addr, pBA);
 666 }
 667
 668 void
 669 TsInitDelBA( struct ieee80211_device* ieee, PTS_COMMON_INFO pTsCommonInfo, TR_SELECT TxRxSelect)
 670 {
 671
 672         if(TxRxSelect == TX_DIR)
 673         {
 674                 PTX_TS_RECORD   pTxTs = (PTX_TS_RECORD)pTsCommonInfo;
 675
 676                 if(TxTsDeleteBA(ieee, pTxTs))
 677                         ieee80211_send_DELBA(
 678                                 ieee,
 679                                 pTsCommonInfo->Addr,
 680                                 (pTxTs->TxAdmittedBARecord.bValid)?(&pTxTs->TxAdmittedBARecord):(&pTxTs->TxPendingBARecord),
 681                                 TxRxSelect,
 682                                 DELBA_REASON_END_BA);
 683         }
 684         else if(TxRxSelect == RX_DIR)
 685         {
 686                 PRX_TS_RECORD   pRxTs = (PRX_TS_RECORD)pTsCommonInfo;
 687                 if(RxTsDeleteBA(ieee, pRxTs))
 688                         ieee80211_send_DELBA(
 689                                 ieee,
 690                                 pTsCommonInfo->Addr,
 691                                 &pRxTs->RxAdmittedBARecord,
 692                                 TxRxSelect,
 693                                 DELBA_REASON_END_BA     );
 694         }
 695 }
 696 /********************************************************************************************************************
 697  *function:  BA setup timer
 698  *   input:  unsigned long       data           //acturally we send TX_TS_RECORD or RX_TS_RECORD to these timer
 699  *  return:  NULL
 700  *  notice:
 701 ********************************************************************************************************************/
 702 void BaSetupTimeOut(unsigned long data)
 703 {
 704         PTX_TS_RECORD   pTxTs = (PTX_TS_RECORD)data;
 705
 706         pTxTs->bAddBaReqInProgress = false;
 707         pTxTs->bAddBaReqDelayed = true;
 708         pTxTs->TxPendingBARecord.bValid = false;
 709 }
 710
 711 void TxBaInactTimeout(unsigned long data)
 712 {
 713         PTX_TS_RECORD   pTxTs = (PTX_TS_RECORD)data;
 714         struct ieee80211_device *ieee = container_of(pTxTs, struct ieee80211_device, TxTsRecord[pTxTs->num]);
 715         TxTsDeleteBA(ieee, pTxTs);
 716         ieee80211_send_DELBA(
 717                 ieee,
 718                 pTxTs->TsCommonInfo.Addr,
 719                 &pTxTs->TxAdmittedBARecord,
 720                 TX_DIR,
 721                 DELBA_REASON_TIMEOUT);
 722 }
 723
 724 void RxBaInactTimeout(unsigned long data)
 725 {
 726         PRX_TS_RECORD   pRxTs = (PRX_TS_RECORD)data;
 727         struct ieee80211_device *ieee = container_of(pRxTs, struct ieee80211_device, RxTsRecord[pRxTs->num]);
 728
 729         RxTsDeleteBA(ieee, pRxTs);
 730         ieee80211_send_DELBA(
 731                 ieee,
 732                 pRxTs->TsCommonInfo.Addr,
 733                 &pRxTs->RxAdmittedBARecord,
 734                 RX_DIR,
 735                 DELBA_REASON_TIMEOUT);
 736         return ;
 737 }
 738