drivers/staging/rtl8192u/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:%pM, ieee->dev:%p\n", __FUNCTION__, type, 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 /********************************************************************************************************************
 179  *function:  construct DELBA frame
 180  *   input:  u8*                dst     //DELBA frame's destination
 181  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA
 182  *           TR_SELECT          TxRxSelect  //TX RX direction
 183  *           u16                ReasonCode  //status code.
 184  *  output:  none
 185  *  return:  sk_buff*           skb     //return constructed skb to xmit
 186 ********************************************************************************************************************/
 187 static struct sk_buff* ieee80211_DELBA(
 188         struct ieee80211_device* ieee,
 189         u8*                      dst,
 190         PBA_RECORD               pBA,
 191         TR_SELECT                TxRxSelect,
 192         u16                      ReasonCode
 193         )
 194 {
 195         DELBA_PARAM_SET DelbaParamSet;
 196         struct sk_buff *skb = NULL;
 197          struct ieee80211_hdr_3addr* Delba = NULL;
 198         u8* tag = NULL;
 199         u16 tmp = 0;
 200         //len = head len + DELBA Parameter Set(2) + Reason Code(2)
 201         u16 len = 6 + ieee->tx_headroom;
 202
 203         if (net_ratelimit())
 204         IEEE80211_DEBUG(IEEE80211_DL_TRACE | IEEE80211_DL_BA, "========>%s(), ReasonCode(%d) sentd to:%pM\n", __FUNCTION__, ReasonCode, dst);
 205
 206         memset(&DelbaParamSet, 0, 2);
 207
 208         DelbaParamSet.field.Initiator   = (TxRxSelect==TX_DIR)?1:0;
 209         DelbaParamSet.field.TID = pBA->BaParamSet.field.TID;
 210
 211         skb = dev_alloc_skb(len + sizeof( struct ieee80211_hdr_3addr)); //need to add something others? FIXME
 212         if (skb == NULL)
 213         {
 214                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't alloc skb for ADDBA_REQ\n");
 215                 return NULL;
 216         }
 217 //      memset(skb->data, 0, len+sizeof( struct ieee80211_hdr_3addr));
 218         skb_reserve(skb, ieee->tx_headroom);
 219
 220         Delba = ( struct ieee80211_hdr_3addr *) skb_put(skb,sizeof( struct ieee80211_hdr_3addr));
 221
 222         memcpy(Delba->addr1, dst, ETH_ALEN);
 223         memcpy(Delba->addr2, ieee->dev->dev_addr, ETH_ALEN);
 224         memcpy(Delba->addr3, ieee->current_network.bssid, ETH_ALEN);
 225         Delba->frame_ctl = cpu_to_le16(IEEE80211_STYPE_MANAGE_ACT); //action frame
 226
 227         tag = (u8*)skb_put(skb, 6);
 228
 229         *tag ++= ACT_CAT_BA;
 230         *tag ++= ACT_DELBA;
 231
 232         // DELBA Parameter Set
 233         tmp = cpu_to_le16(DelbaParamSet.shortData);
 234         memcpy(tag, (u8*)&tmp, 2);
 235         tag += 2;
 236         // Reason Code
 237         tmp = cpu_to_le16(ReasonCode);
 238         memcpy(tag, (u8*)&tmp, 2);
 239         tag += 2;
 240
 241         IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA|IEEE80211_DL_BA, skb->data, skb->len);
 242         if (net_ratelimit())
 243         IEEE80211_DEBUG(IEEE80211_DL_TRACE | IEEE80211_DL_BA, "<=====%s()\n", __FUNCTION__);
 244         return skb;
 245 }
 246
 247 /********************************************************************************************************************
 248  *function: send ADDBAReq frame out
 249  *   input:  u8*                dst     //ADDBAReq frame's destination
 250  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA
 251  *  output:  none
 252  *  notice: If any possible, please hide pBA in ieee. And temporarily use Manage Queue as softmac_mgmt_xmit() usually does
 253 ********************************************************************************************************************/
 254 void ieee80211_send_ADDBAReq(struct ieee80211_device* ieee, u8* dst, PBA_RECORD pBA)
 255 {
 256         struct sk_buff *skb = NULL;
 257         skb = ieee80211_ADDBA(ieee, dst, pBA, 0, ACT_ADDBAREQ); //construct ACT_ADDBAREQ frames so set statuscode zero.
 258
 259         if (skb)
 260         {
 261                 softmac_mgmt_xmit(skb, ieee);
 262                 //add statistic needed here.
 263                 //and skb will be freed in softmac_mgmt_xmit(), so omit all dev_kfree_skb_any() outside softmac_mgmt_xmit()
 264                 //WB
 265         }
 266         else
 267         {
 268                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "alloc skb error in function %s()\n", __FUNCTION__);
 269         }
 270         return;
 271 }
 272
 273 /********************************************************************************************************************
 274  *function: send ADDBARSP frame out
 275  *   input:  u8*                dst     //DELBA frame's destination
 276  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA
 277  *           u16                StatusCode //RSP StatusCode
 278  *  output:  none
 279  *  notice: If any possible, please hide pBA in ieee. And temporarily use Manage Queue as softmac_mgmt_xmit() usually does
 280 ********************************************************************************************************************/
 281 void ieee80211_send_ADDBARsp(struct ieee80211_device* ieee, u8* dst, PBA_RECORD pBA, u16 StatusCode)
 282 {
 283         struct sk_buff *skb = NULL;
 284         skb = ieee80211_ADDBA(ieee, dst, pBA, StatusCode, ACT_ADDBARSP); //construct ACT_ADDBARSP frames
 285         if (skb)
 286         {
 287                 softmac_mgmt_xmit(skb, ieee);
 288                 //same above
 289         }
 290         else
 291         {
 292                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "alloc skb error in function %s()\n", __FUNCTION__);
 293         }
 294
 295         return;
 296
 297 }
 298 /********************************************************************************************************************
 299  *function: send ADDBARSP frame out
 300  *   input:  u8*                dst     //DELBA frame's destination
 301  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA
 302  *           TR_SELECT          TxRxSelect //TX or RX
 303  *           u16                ReasonCode //DEL ReasonCode
 304  *  output:  none
 305  *  notice: If any possible, please hide pBA in ieee. And temporarily use Manage Queue as softmac_mgmt_xmit() usually does
 306 ********************************************************************************************************************/
 307
 308 void ieee80211_send_DELBA(struct ieee80211_device* ieee, u8* dst, PBA_RECORD pBA, TR_SELECT TxRxSelect, u16 ReasonCode)
 309 {
 310         struct sk_buff *skb = NULL;
 311         skb = ieee80211_DELBA(ieee, dst, pBA, TxRxSelect, ReasonCode); //construct ACT_ADDBARSP frames
 312         if (skb)
 313         {
 314                 softmac_mgmt_xmit(skb, ieee);
 315                 //same above
 316         }
 317         else
 318         {
 319                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "alloc skb error in function %s()\n", __FUNCTION__);
 320         }
 321         return ;
 322 }
 323
 324 /********************************************************************************************************************
 325  *function: RX ADDBAReq
 326  *   input:  struct sk_buff *   skb     //incoming ADDBAReq skb.
 327  *  return:  0(pass), other(fail)
 328  *  notice:  As this function need support of QOS, I comment some code out. And when qos is ready, this code need to be support.
 329 ********************************************************************************************************************/
 330 int ieee80211_rx_ADDBAReq( struct ieee80211_device* ieee, struct sk_buff *skb)
 331 {
 332          struct ieee80211_hdr_3addr* req = NULL;
 333         u16 rc = 0;
 334         u8 * dst = NULL, *pDialogToken = NULL, *tag = NULL;
 335         PBA_RECORD pBA = NULL;
 336         PBA_PARAM_SET   pBaParamSet = NULL;
 337         u16* pBaTimeoutVal = NULL;
 338         PSEQUENCE_CONTROL pBaStartSeqCtrl = NULL;
 339         PRX_TS_RECORD   pTS = NULL;
 340
 341         if (skb->len < sizeof( struct ieee80211_hdr_3addr) + 9)
 342         {
 343                 IEEE80211_DEBUG(IEEE80211_DL_ERR, " Invalid skb len in BAREQ(%d / %zu)\n", skb->len,    (sizeof( struct ieee80211_hdr_3addr) + 9));
 344                 return -1;
 345         }
 346
 347         IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA|IEEE80211_DL_BA, skb->data, skb->len);
 348
 349         req = ( struct ieee80211_hdr_3addr*) skb->data;
 350         tag = (u8*)req;
 351         dst = (u8*)(&req->addr2[0]);
 352         tag += sizeof( struct ieee80211_hdr_3addr);
 353         pDialogToken = tag + 2;  //category+action
 354         pBaParamSet = (PBA_PARAM_SET)(tag + 3);   //+DialogToken
 355         pBaTimeoutVal = (u16*)(tag + 5);
 356         pBaStartSeqCtrl = (PSEQUENCE_CONTROL)(req + 7);
 357
 358         printk("====================>rx ADDBAREQ from :%pM\n", dst);
 359 //some other capability is not ready now.
 360         if(     (ieee->current_network.qos_data.active == 0) ||
 361                 (ieee->pHTInfo->bCurrentHTSupport == false)) //||
 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         pBA->BaParamSet.field.BufferSize = 1;
 403         else
 404         pBA->BaParamSet.field.BufferSize = 32;
 405         ActivateBAEntry(ieee, pBA, pBA->BaTimeoutValue);
 406         ieee80211_send_ADDBARsp(ieee, dst, pBA, ADDBA_STATUS_SUCCESS);
 407
 408         // End of procedure.
 409         return 0;
 410
 411 OnADDBAReq_Fail:
 412         {
 413                 BA_RECORD       BA;
 414                 BA.BaParamSet = *pBaParamSet;
 415                 BA.BaTimeoutValue = *pBaTimeoutVal;
 416                 BA.DialogToken = *pDialogToken;
 417                 BA.BaParamSet.field.BAPolicy = BA_POLICY_IMMEDIATE;
 418                 ieee80211_send_ADDBARsp(ieee, dst, &BA, rc);
 419                 return 0; //we send RSP out.
 420         }
 421
 422 }
 423
 424 /********************************************************************************************************************
 425  *function: RX ADDBARSP
 426  *   input:  struct sk_buff *   skb     //incoming ADDBAReq skb.
 427  *  return:  0(pass), other(fail)
 428  *  notice:  As this function need support of QOS, I comment some code out. And when qos is ready, this code need to be support.
 429 ********************************************************************************************************************/
 430 int ieee80211_rx_ADDBARsp( struct ieee80211_device* ieee, struct sk_buff *skb)
 431 {
 432          struct ieee80211_hdr_3addr* rsp = NULL;
 433         PBA_RECORD              pPendingBA, pAdmittedBA;
 434         PTX_TS_RECORD           pTS = NULL;
 435         u8* dst = NULL, *pDialogToken = NULL, *tag = NULL;
 436         u16* pStatusCode = NULL, *pBaTimeoutVal = NULL;
 437         PBA_PARAM_SET           pBaParamSet = NULL;
 438         u16                     ReasonCode;
 439
 440         if (skb->len < sizeof( struct ieee80211_hdr_3addr) + 9)
 441         {
 442                 IEEE80211_DEBUG(IEEE80211_DL_ERR, " Invalid skb len in BARSP(%d / %zu)\n", skb->len,    (sizeof( struct ieee80211_hdr_3addr) + 9));
 443                 return -1;
 444         }
 445         rsp = ( struct ieee80211_hdr_3addr*)skb->data;
 446         tag = (u8*)rsp;
 447         dst = (u8*)(&rsp->addr2[0]);
 448         tag += sizeof( struct ieee80211_hdr_3addr);
 449         pDialogToken = tag + 2;
 450         pStatusCode = (u16*)(tag + 3);
 451         pBaParamSet = (PBA_PARAM_SET)(tag + 5);
 452         pBaTimeoutVal = (u16*)(tag + 7);
 453
 454         // Check the capability
 455         // Since we can always receive A-MPDU, we just check if it is under HT mode.
 456         if(     ieee->current_network.qos_data.active == 0  ||
 457                 ieee->pHTInfo->bCurrentHTSupport == false ||
 458                 ieee->pHTInfo->bCurrentAMPDUEnable == false )
 459         {
 460                 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);
 461                 ReasonCode = DELBA_REASON_UNKNOWN_BA;
 462                 goto OnADDBARsp_Reject;
 463         }
 464
 465
 466         //
 467         // Search for related TS.
 468         // If there is no TS found, we wil reject ADDBA Rsp by sending DELBA frame.
 469         //
 470         if (!GetTs(
 471                         ieee,
 472                         (PTS_COMMON_INFO*)(&pTS),
 473                         dst,
 474                         (u8)(pBaParamSet->field.TID),
 475                         TX_DIR,
 476                         false)  )
 477         {
 478                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't get TS in %s()\n", __FUNCTION__);
 479                 ReasonCode = DELBA_REASON_UNKNOWN_BA;
 480                 goto OnADDBARsp_Reject;
 481         }
 482
 483         pTS->bAddBaReqInProgress = false;
 484         pPendingBA = &pTS->TxPendingBARecord;
 485         pAdmittedBA = &pTS->TxAdmittedBARecord;
 486
 487
 488         //
 489         // Check if related BA is waiting for setup.
 490         // If not, reject by sending DELBA frame.
 491         //
 492         if((pAdmittedBA->bValid==true))
 493         {
 494                 // Since BA is already setup, we ignore all other ADDBA Response.
 495                 IEEE80211_DEBUG(IEEE80211_DL_BA, "OnADDBARsp(): Recv ADDBA Rsp. Drop because already admit it! \n");
 496                 return -1;
 497         }
 498         else if((pPendingBA->bValid == false) ||(*pDialogToken != pPendingBA->DialogToken))
 499         {
 500                 IEEE80211_DEBUG(IEEE80211_DL_ERR,  "OnADDBARsp(): Recv ADDBA Rsp. BA invalid, DELBA! \n");
 501                 ReasonCode = DELBA_REASON_UNKNOWN_BA;
 502                 goto OnADDBARsp_Reject;
 503         }
 504         else
 505         {
 506                 IEEE80211_DEBUG(IEEE80211_DL_BA, "OnADDBARsp(): Recv ADDBA Rsp. BA is admitted! Status code:%X\n", *pStatusCode);
 507                 DeActivateBAEntry(ieee, pPendingBA);
 508         }
 509
 510
 511         if(*pStatusCode == ADDBA_STATUS_SUCCESS)
 512         {
 513                 //
 514                 // Determine ADDBA Rsp content here.
 515                 // We can compare the value of BA parameter set that Peer returned and Self sent.
 516                 // If it is OK, then admitted. Or we can send DELBA to cancel BA mechanism.
 517                 //
 518                 if(pBaParamSet->field.BAPolicy == BA_POLICY_DELAYED)
 519                 {
 520                         // Since this is a kind of ADDBA failed, we delay next ADDBA process.
 521                         pTS->bAddBaReqDelayed = true;
 522                         DeActivateBAEntry(ieee, pAdmittedBA);
 523                         ReasonCode = DELBA_REASON_END_BA;
 524                         goto OnADDBARsp_Reject;
 525                 }
 526
 527
 528                 //
 529                 // Admitted condition
 530                 //
 531                 pAdmittedBA->DialogToken = *pDialogToken;
 532                 pAdmittedBA->BaTimeoutValue = *pBaTimeoutVal;
 533                 pAdmittedBA->BaStartSeqCtrl = pPendingBA->BaStartSeqCtrl;
 534                 pAdmittedBA->BaParamSet = *pBaParamSet;
 535                 DeActivateBAEntry(ieee, pAdmittedBA);
 536                 ActivateBAEntry(ieee, pAdmittedBA, *pBaTimeoutVal);
 537         }
 538         else
 539         {
 540                 // Delay next ADDBA process.
 541                 pTS->bAddBaReqDelayed = true;
 542         }
 543
 544         // End of procedure
 545         return 0;
 546
 547 OnADDBARsp_Reject:
 548         {
 549                 BA_RECORD       BA;
 550                 BA.BaParamSet = *pBaParamSet;
 551                 ieee80211_send_DELBA(ieee, dst, &BA, TX_DIR, ReasonCode);
 552                 return 0;
 553         }
 554
 555 }
 556
 557 /********************************************************************************************************************
 558  *function: RX DELBA
 559  *   input:  struct sk_buff *   skb     //incoming ADDBAReq skb.
 560  *  return:  0(pass), other(fail)
 561  *  notice:  As this function need support of QOS, I comment some code out. And when qos is ready, this code need to be support.
 562 ********************************************************************************************************************/
 563 int ieee80211_rx_DELBA(struct ieee80211_device* ieee,struct sk_buff *skb)
 564 {
 565          struct ieee80211_hdr_3addr* delba = NULL;
 566         PDELBA_PARAM_SET        pDelBaParamSet = NULL;
 567         u16*                    pReasonCode = NULL;
 568         u8*                     dst = NULL;
 569
 570         if (skb->len < sizeof( struct ieee80211_hdr_3addr) + 6)
 571         {
 572                 IEEE80211_DEBUG(IEEE80211_DL_ERR, " Invalid skb len in DELBA(%d / %zu)\n", skb->len,    (sizeof( struct ieee80211_hdr_3addr) + 6));
 573                 return -1;
 574         }
 575
 576         if(ieee->current_network.qos_data.active == 0 ||
 577                 ieee->pHTInfo->bCurrentHTSupport == false )
 578         {
 579                 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);
 580                 return -1;
 581         }
 582
 583         IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA|IEEE80211_DL_BA, skb->data, skb->len);
 584         delba = ( struct ieee80211_hdr_3addr*)skb->data;
 585         dst = (u8*)(&delba->addr2[0]);
 586         delba += sizeof( struct ieee80211_hdr_3addr);
 587         pDelBaParamSet = (PDELBA_PARAM_SET)(delba+2);
 588         pReasonCode = (u16*)(delba+4);
 589
 590         if(pDelBaParamSet->field.Initiator == 1)
 591         {
 592                 PRX_TS_RECORD   pRxTs;
 593
 594                 if( !GetTs(
 595                                 ieee,
 596                                 (PTS_COMMON_INFO*)&pRxTs,
 597                                 dst,
 598                                 (u8)pDelBaParamSet->field.TID,
 599                                 RX_DIR,
 600                                 false)  )
 601                 {
 602                         IEEE80211_DEBUG(IEEE80211_DL_ERR,  "can't get TS for RXTS in %s()\n", __FUNCTION__);
 603                         return -1;
 604                 }
 605
 606                 RxTsDeleteBA(ieee, pRxTs);
 607         }
 608         else
 609         {
 610                 PTX_TS_RECORD   pTxTs;
 611
 612                 if(!GetTs(
 613                         ieee,
 614                         (PTS_COMMON_INFO*)&pTxTs,
 615                         dst,
 616                         (u8)pDelBaParamSet->field.TID,
 617                         TX_DIR,
 618                         false)  )
 619                 {
 620                         IEEE80211_DEBUG(IEEE80211_DL_ERR,  "can't get TS for TXTS in %s()\n", __FUNCTION__);
 621                         return -1;
 622                 }
 623
 624                 pTxTs->bUsingBa = false;
 625                 pTxTs->bAddBaReqInProgress = false;
 626                 pTxTs->bAddBaReqDelayed = false;
 627                 del_timer_sync(&pTxTs->TsAddBaTimer);
 628                 //PlatformCancelTimer(Adapter, &pTxTs->TsAddBaTimer);
 629                 TxTsDeleteBA(ieee, pTxTs);
 630         }
 631         return 0;
 632 }
 633
 634 //
 635 // ADDBA initiate. This can only be called by TX side.
 636 //
 637 void
 638 TsInitAddBA(
 639         struct ieee80211_device* ieee,
 640         PTX_TS_RECORD   pTS,
 641         u8              Policy,
 642         u8              bOverwritePending
 643         )
 644 {
 645         PBA_RECORD                      pBA = &pTS->TxPendingBARecord;
 646
 647         if(pBA->bValid==true && bOverwritePending==false)
 648                 return;
 649
 650         // Set parameters to "Pending" variable set
 651         DeActivateBAEntry(ieee, pBA);
 652
 653         pBA->DialogToken++;                                             // DialogToken: Only keep the latest dialog token
 654         pBA->BaParamSet.field.AMSDU_Support = 0;        // Do not support A-MSDU with A-MPDU now!!
 655         pBA->BaParamSet.field.BAPolicy = Policy;        // Policy: Delayed or Immediate
 656         pBA->BaParamSet.field.TID = pTS->TsCommonInfo.TSpec.f.TSInfo.field.ucTSID;      // TID
 657         // BufferSize: This need to be set according to A-MPDU vector
 658         pBA->BaParamSet.field.BufferSize = 32;          // BufferSize: This need to be set according to A-MPDU vector
 659         pBA->BaTimeoutValue = 0;                                        // Timeout value: Set 0 to disable Timer
 660         pBA->BaStartSeqCtrl.field.SeqNum = (pTS->TxCurSeq + 3) % 4096;  // Block Ack will start after 3 packets later.
 661
 662         ActivateBAEntry(ieee, pBA, BA_SETUP_TIMEOUT);
 663
 664         ieee80211_send_ADDBAReq(ieee, pTS->TsCommonInfo.Addr, pBA);
 665 }
 666
 667 void
 668 TsInitDelBA( struct ieee80211_device* ieee, PTS_COMMON_INFO pTsCommonInfo, TR_SELECT TxRxSelect)
 669 {
 670
 671         if(TxRxSelect == TX_DIR)
 672         {
 673                 PTX_TS_RECORD   pTxTs = (PTX_TS_RECORD)pTsCommonInfo;
 674
 675                 if(TxTsDeleteBA(ieee, pTxTs))
 676                         ieee80211_send_DELBA(
 677                                 ieee,
 678                                 pTsCommonInfo->Addr,
 679                                 (pTxTs->TxAdmittedBARecord.bValid)?(&pTxTs->TxAdmittedBARecord):(&pTxTs->TxPendingBARecord),
 680                                 TxRxSelect,
 681                                 DELBA_REASON_END_BA);
 682         }
 683         else if(TxRxSelect == RX_DIR)
 684         {
 685                 PRX_TS_RECORD   pRxTs = (PRX_TS_RECORD)pTsCommonInfo;
 686                 if(RxTsDeleteBA(ieee, pRxTs))
 687                         ieee80211_send_DELBA(
 688                                 ieee,
 689                                 pTsCommonInfo->Addr,
 690                                 &pRxTs->RxAdmittedBARecord,
 691                                 TxRxSelect,
 692                                 DELBA_REASON_END_BA     );
 693         }
 694 }
 695 /********************************************************************************************************************
 696  *function:  BA setup timer
 697  *   input:  unsigned long       data           //acturally we send TX_TS_RECORD or RX_TS_RECORD to these timer
 698  *  return:  NULL
 699  *  notice:
 700 ********************************************************************************************************************/
 701 void BaSetupTimeOut(unsigned long data)
 702 {
 703         PTX_TS_RECORD   pTxTs = (PTX_TS_RECORD)data;
 704
 705         pTxTs->bAddBaReqInProgress = false;
 706         pTxTs->bAddBaReqDelayed = true;
 707         pTxTs->TxPendingBARecord.bValid = false;
 708 }
 709
 710 void TxBaInactTimeout(unsigned long data)
 711 {
 712         PTX_TS_RECORD   pTxTs = (PTX_TS_RECORD)data;
 713         struct ieee80211_device *ieee = container_of(pTxTs, struct ieee80211_device, TxTsRecord[pTxTs->num]);
 714         TxTsDeleteBA(ieee, pTxTs);
 715         ieee80211_send_DELBA(
 716                 ieee,
 717                 pTxTs->TsCommonInfo.Addr,
 718                 &pTxTs->TxAdmittedBARecord,
 719                 TX_DIR,
 720                 DELBA_REASON_TIMEOUT);
 721 }
 722
 723 void RxBaInactTimeout(unsigned long data)
 724 {
 725         PRX_TS_RECORD   pRxTs = (PRX_TS_RECORD)data;
 726         struct ieee80211_device *ieee = container_of(pRxTs, struct ieee80211_device, RxTsRecord[pRxTs->num]);
 727
 728         RxTsDeleteBA(ieee, pRxTs);
 729         ieee80211_send_DELBA(
 730                 ieee,
 731                 pRxTs->TsCommonInfo.Addr,
 732                 &pRxTs->RxAdmittedBARecord,
 733                 RX_DIR,
 734                 DELBA_REASON_TIMEOUT);
 735         return ;
 736 }
 737