kernel/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 structure 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 <asm/byteorder.h>
   8 #include <asm/unaligned.h>
   9 #include "ieee80211.h"
  10 #include "rtl819x_BA.h"
  11
  12 /********************************************************************************************************************
  13  *function:  Activate BA entry. And if Time is nozero, start timer.
  14  *   input:  PBA_RECORD                 pBA  //BA entry to be enabled
  15  *           u16                        Time //indicate time delay.
  16  *  output:  none
  17 ********************************************************************************************************************/
  18 static void ActivateBAEntry(struct ieee80211_device *ieee, PBA_RECORD pBA, u16 Time)
  19 {
  20         pBA->bValid = true;
  21         if(Time != 0)
  22                 mod_timer(&pBA->Timer, jiffies + MSECS(Time));
  23 }
  24
  25 /********************************************************************************************************************
  26  *function:  deactivate BA entry, including its timer.
  27  *   input:  PBA_RECORD                 pBA  //BA entry to be disabled
  28  *  output:  none
  29 ********************************************************************************************************************/
  30 static void DeActivateBAEntry(struct ieee80211_device *ieee, PBA_RECORD pBA)
  31 {
  32         pBA->bValid = false;
  33         del_timer_sync(&pBA->Timer);
  34 }
  35 /********************************************************************************************************************
  36  *function: deactivete BA entry in Tx Ts, and send DELBA.
  37  *   input:
  38  *           PTX_TS_RECORD              pTxTs //Tx Ts which is to deactivate BA entry.
  39  *  output:  none
  40  *  notice:  As PTX_TS_RECORD structure will be defined in QOS, so wait to be merged. //FIXME
  41 ********************************************************************************************************************/
  42 static u8 TxTsDeleteBA(struct ieee80211_device *ieee, PTX_TS_RECORD pTxTs)
  43 {
  44         PBA_RECORD              pAdmittedBa = &pTxTs->TxAdmittedBARecord;  //These two BA entries must exist in TS structure
  45         PBA_RECORD              pPendingBa = &pTxTs->TxPendingBARecord;
  46         u8                      bSendDELBA = false;
  47
  48         // Delete pending BA
  49         if (pPendingBa->bValid)
  50         {
  51                 DeActivateBAEntry(ieee, pPendingBa);
  52                 bSendDELBA = true;
  53         }
  54
  55         // Delete admitted BA
  56         if (pAdmittedBa->bValid)
  57         {
  58                 DeActivateBAEntry(ieee, pAdmittedBa);
  59                 bSendDELBA = true;
  60         }
  61
  62         return bSendDELBA;
  63 }
  64
  65 /********************************************************************************************************************
  66  *function: deactivete BA entry in Tx Ts, and send DELBA.
  67  *   input:
  68  *           PRX_TS_RECORD              pRxTs //Rx Ts which is to deactivate BA entry.
  69  *  output:  none
  70  *  notice:  As PRX_TS_RECORD structure will be defined in QOS, so wait to be merged. //FIXME, same with above
  71 ********************************************************************************************************************/
  72 static u8 RxTsDeleteBA(struct ieee80211_device *ieee, PRX_TS_RECORD pRxTs)
  73 {
  74         PBA_RECORD              pBa = &pRxTs->RxAdmittedBARecord;
  75         u8                      bSendDELBA = false;
  76
  77         if (pBa->bValid)
  78         {
  79                 DeActivateBAEntry(ieee, pBa);
  80                 bSendDELBA = true;
  81         }
  82
  83         return bSendDELBA;
  84 }
  85
  86 /********************************************************************************************************************
  87  *function: reset BA entry
  88  *   input:
  89  *           PBA_RECORD         pBA //entry to be reset
  90  *  output:  none
  91 ********************************************************************************************************************/
  92 void ResetBaEntry(PBA_RECORD pBA)
  93 {
  94         pBA->bValid                     = false;
  95         pBA->BaParamSet.shortData       = 0;
  96         pBA->BaTimeoutValue             = 0;
  97         pBA->DialogToken                = 0;
  98         pBA->BaStartSeqCtrl.ShortData   = 0;
  99 }
 100 //These functions need porting here or not?
 101 /*******************************************************************************************************************************
 102  *function:  construct ADDBAREQ and ADDBARSP frame here together.
 103  *   input:  u8*                Dst     //ADDBA frame's destination
 104  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA.
 105  *           u16                StatusCode  //status code in RSP and I will use it to indicate whether it's RSP or REQ(will I?)
 106  *           u8                 type    //indicate whether it's RSP(ACT_ADDBARSP) ow REQ(ACT_ADDBAREQ)
 107  *  output:  none
 108  *  return:  sk_buff*           skb     //return constructed skb to xmit
 109 *******************************************************************************************************************************/
 110 static struct sk_buff *ieee80211_ADDBA(struct ieee80211_device *ieee, u8 *Dst, PBA_RECORD pBA, u16 StatusCode, u8 type)
 111 {
 112         struct sk_buff *skb = NULL;
 113          struct ieee80211_hdr_3addr *BAReq = NULL;
 114         u8 *tag = NULL;
 115         u16 len = ieee->tx_headroom + 9;
 116         //category(1) + action field(1) + Dialog Token(1) + BA Parameter Set(2) +  BA Timeout Value(2) +  BA Start SeqCtrl(2)(or StatusCode(2))
 117         IEEE80211_DEBUG(IEEE80211_DL_TRACE | IEEE80211_DL_BA, "========>%s(), frame(%d) sentd to:%pM, ieee->dev:%p\n", __func__, type, Dst, ieee->dev);
 118         if (pBA == NULL)
 119         {
 120                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "pBA is NULL\n");
 121                 return NULL;
 122         }
 123         skb = dev_alloc_skb(len + sizeof( struct ieee80211_hdr_3addr)); //need to add something others? FIXME
 124         if (skb == NULL)
 125         {
 126                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't alloc skb for ADDBA_REQ\n");
 127                 return NULL;
 128         }
 129
 130         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.
 131         skb_reserve(skb, ieee->tx_headroom);
 132
 133         BAReq = ( struct ieee80211_hdr_3addr *) skb_put(skb,sizeof( struct ieee80211_hdr_3addr));
 134
 135         memcpy(BAReq->addr1, Dst, ETH_ALEN);
 136         memcpy(BAReq->addr2, ieee->dev->dev_addr, ETH_ALEN);
 137
 138         memcpy(BAReq->addr3, ieee->current_network.bssid, ETH_ALEN);
 139
 140         BAReq->frame_ctl = cpu_to_le16(IEEE80211_STYPE_MANAGE_ACT); //action frame
 141
 142         //tag += sizeof( struct ieee80211_hdr_3addr); //move to action field
 143         tag = (u8 *)skb_put(skb, 9);
 144         *tag ++= ACT_CAT_BA;
 145         *tag ++= type;
 146         // Dialog Token
 147         *tag ++= pBA->DialogToken;
 148
 149         if (ACT_ADDBARSP == type)
 150         {
 151                 // Status Code
 152                 printk("=====>to send ADDBARSP\n");
 153
 154                 put_unaligned_le16(StatusCode, tag);
 155                 tag += 2;
 156         }
 157         // BA Parameter Set
 158
 159         put_unaligned_le16(pBA->BaParamSet.shortData, tag);
 160         tag += 2;
 161         // BA Timeout Value
 162
 163         put_unaligned_le16(pBA->BaTimeoutValue, tag);
 164         tag += 2;
 165
 166         if (ACT_ADDBAREQ == type)
 167         {
 168         // BA Start SeqCtrl
 169                 memcpy(tag, (u8 *)&(pBA->BaStartSeqCtrl), 2);
 170                 tag += 2;
 171         }
 172
 173         IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA|IEEE80211_DL_BA, skb->data, skb->len);
 174         return skb;
 175         //return NULL;
 176 }
 177
 178
 179 /********************************************************************************************************************
 180  *function:  construct DELBA frame
 181  *   input:  u8*                dst     //DELBA frame's destination
 182  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA
 183  *           TR_SELECT          TxRxSelect  //TX RX direction
 184  *           u16                ReasonCode  //status code.
 185  *  output:  none
 186  *  return:  sk_buff*           skb     //return constructed skb to xmit
 187 ********************************************************************************************************************/
 188 static struct sk_buff *ieee80211_DELBA(
 189         struct ieee80211_device  *ieee,
 190         u8                       *dst,
 191         PBA_RECORD               pBA,
 192         TR_SELECT                TxRxSelect,
 193         u16                      ReasonCode
 194         )
 195 {
 196         DELBA_PARAM_SET DelbaParamSet;
 197         struct sk_buff *skb = NULL;
 198          struct ieee80211_hdr_3addr *Delba = NULL;
 199         u8 *tag = NULL;
 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", __func__, 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
 234         put_unaligned_le16(DelbaParamSet.shortData, tag);
 235         tag += 2;
 236         // Reason Code
 237
 238         put_unaligned_le16(ReasonCode, tag);
 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", __func__);
 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 static void ieee80211_send_ADDBAReq(struct ieee80211_device *ieee,
 255                                     u8 *dst, PBA_RECORD pBA)
 256 {
 257         struct sk_buff *skb = NULL;
 258         skb = ieee80211_ADDBA(ieee, dst, pBA, 0, ACT_ADDBAREQ); //construct ACT_ADDBAREQ frames so set statuscode zero.
 259
 260         if (skb)
 261         {
 262                 softmac_mgmt_xmit(skb, ieee);
 263                 //add statistic needed here.
 264                 //and skb will be freed in softmac_mgmt_xmit(), so omit all dev_kfree_skb_any() outside softmac_mgmt_xmit()
 265                 //WB
 266         }
 267         else
 268         {
 269                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "alloc skb error in function %s()\n", __func__);
 270         }
 271         return;
 272 }
 273
 274 /********************************************************************************************************************
 275  *function: send ADDBARSP frame out
 276  *   input:  u8*                dst     //DELBA frame's destination
 277  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA
 278  *           u16                StatusCode //RSP StatusCode
 279  *  output:  none
 280  *  notice: If any possible, please hide pBA in ieee. And temporarily use Manage Queue as softmac_mgmt_xmit() usually does
 281 ********************************************************************************************************************/
 282 static void ieee80211_send_ADDBARsp(struct ieee80211_device *ieee, u8 *dst,
 283                                     PBA_RECORD pBA, u16 StatusCode)
 284 {
 285         struct sk_buff *skb = NULL;
 286         skb = ieee80211_ADDBA(ieee, dst, pBA, StatusCode, ACT_ADDBARSP); //construct ACT_ADDBARSP frames
 287         if (skb)
 288         {
 289                 softmac_mgmt_xmit(skb, ieee);
 290                 //same above
 291         }
 292         else
 293         {
 294                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "alloc skb error in function %s()\n", __func__);
 295         }
 296
 297         return;
 298
 299 }
 300 /********************************************************************************************************************
 301  *function: send ADDBARSP frame out
 302  *   input:  u8*                dst     //DELBA frame's destination
 303  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA
 304  *           TR_SELECT          TxRxSelect //TX or RX
 305  *           u16                ReasonCode //DEL ReasonCode
 306  *  output:  none
 307  *  notice: If any possible, please hide pBA in ieee. And temporarily use Manage Queue as softmac_mgmt_xmit() usually does
 308 ********************************************************************************************************************/
 309
 310 static void ieee80211_send_DELBA(struct ieee80211_device *ieee, u8 *dst,
 311                                  PBA_RECORD pBA, TR_SELECT TxRxSelect,
 312                                  u16 ReasonCode)
 313 {
 314         struct sk_buff *skb = NULL;
 315         skb = ieee80211_DELBA(ieee, dst, pBA, TxRxSelect, ReasonCode); //construct ACT_ADDBARSP frames
 316         if (skb)
 317         {
 318                 softmac_mgmt_xmit(skb, ieee);
 319                 //same above
 320         }
 321         else
 322         {
 323                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "alloc skb error in function %s()\n", __func__);
 324         }
 325         return ;
 326 }
 327
 328 /********************************************************************************************************************
 329  *function: RX ADDBAReq
 330  *   input:  struct sk_buff *   skb     //incoming ADDBAReq skb.
 331  *  return:  0(pass), other(fail)
 332  *  notice:  As this function need support of QOS, I comment some code out. And when qos is ready, this code need to be support.
 333 ********************************************************************************************************************/
 334 int ieee80211_rx_ADDBAReq(struct ieee80211_device *ieee, struct sk_buff *skb)
 335 {
 336          struct ieee80211_hdr_3addr *req = NULL;
 337         u16 rc = 0;
 338         u8 *dst = NULL, *pDialogToken = NULL, *tag = NULL;
 339         PBA_RECORD pBA = NULL;
 340         PBA_PARAM_SET   pBaParamSet = NULL;
 341         u16 *pBaTimeoutVal = NULL;
 342         PSEQUENCE_CONTROL pBaStartSeqCtrl = NULL;
 343         PRX_TS_RECORD   pTS = NULL;
 344
 345         if (skb->len < sizeof(struct ieee80211_hdr_3addr) + 9) {
 346                 IEEE80211_DEBUG(IEEE80211_DL_ERR,
 347                                 " Invalid skb len in BAREQ(%d / %zu)\n",
 348                                 skb->len,
 349                                 (sizeof(struct ieee80211_hdr_3addr) + 9));
 350                 return -1;
 351         }
 352
 353         IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA|IEEE80211_DL_BA, skb->data, skb->len);
 354
 355         req = (struct ieee80211_hdr_3addr *) skb->data;
 356         tag = (u8 *)req;
 357         dst = (u8 *)(&req->addr2[0]);
 358         tag += sizeof(struct ieee80211_hdr_3addr);
 359         pDialogToken = tag + 2;  //category+action
 360         pBaParamSet = (PBA_PARAM_SET)(tag + 3);   //+DialogToken
 361         pBaTimeoutVal = (u16 *)(tag + 5);
 362         pBaStartSeqCtrl = (PSEQUENCE_CONTROL)(req + 7);
 363
 364         printk("====================>rx ADDBAREQ from :%pM\n", dst);
 365 //some other capability is not ready now.
 366         if ((ieee->current_network.qos_data.active == 0) ||
 367                 (ieee->pHTInfo->bCurrentHTSupport == false)) //||
 368         //      (ieee->pStaQos->bEnableRxImmBA == false)        )
 369         {
 370                 rc = ADDBA_STATUS_REFUSED;
 371                 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);
 372                 goto OnADDBAReq_Fail;
 373         }
 374         // Search for related traffic stream.
 375         // If there is no matched TS, reject the ADDBA request.
 376         if (!GetTs(
 377                         ieee,
 378                         (PTS_COMMON_INFO *)(&pTS),
 379                         dst,
 380                         (u8)(pBaParamSet->field.TID),
 381                         RX_DIR,
 382                         true)   )
 383         {
 384                 rc = ADDBA_STATUS_REFUSED;
 385                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't get TS in %s()\n", __func__);
 386                 goto OnADDBAReq_Fail;
 387         }
 388         pBA = &pTS->RxAdmittedBARecord;
 389         // To Determine the ADDBA Req content
 390         // We can do much more check here, including BufferSize, AMSDU_Support, Policy, StartSeqCtrl...
 391         // I want to check StartSeqCtrl to make sure when we start aggregation!!!
 392         //
 393         if (pBaParamSet->field.BAPolicy == BA_POLICY_DELAYED)
 394         {
 395                 rc = ADDBA_STATUS_INVALID_PARAM;
 396                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "BA Policy is not correct in %s()\n", __func__);
 397                 goto OnADDBAReq_Fail;
 398         }
 399                 // Admit the ADDBA Request
 400         //
 401         DeActivateBAEntry(ieee, pBA);
 402         pBA->DialogToken = *pDialogToken;
 403         pBA->BaParamSet = *pBaParamSet;
 404         pBA->BaTimeoutValue = *pBaTimeoutVal;
 405         pBA->BaStartSeqCtrl = *pBaStartSeqCtrl;
 406         //for half N mode we only aggregate 1 frame
 407         if (ieee->GetHalfNmodeSupportByAPsHandler(ieee->dev))
 408         pBA->BaParamSet.field.BufferSize = 1;
 409         else
 410         pBA->BaParamSet.field.BufferSize = 32;
 411         ActivateBAEntry(ieee, pBA, pBA->BaTimeoutValue);
 412         ieee80211_send_ADDBARsp(ieee, dst, pBA, ADDBA_STATUS_SUCCESS);
 413
 414         // End of procedure.
 415         return 0;
 416
 417 OnADDBAReq_Fail:
 418         {
 419                 BA_RECORD       BA;
 420                 BA.BaParamSet = *pBaParamSet;
 421                 BA.BaTimeoutValue = *pBaTimeoutVal;
 422                 BA.DialogToken = *pDialogToken;
 423                 BA.BaParamSet.field.BAPolicy = BA_POLICY_IMMEDIATE;
 424                 ieee80211_send_ADDBARsp(ieee, dst, &BA, rc);
 425                 return 0; //we send RSP out.
 426         }
 427
 428 }
 429
 430 /********************************************************************************************************************
 431  *function: RX ADDBARSP
 432  *   input:  struct sk_buff *   skb     //incoming ADDBAReq skb.
 433  *  return:  0(pass), other(fail)
 434  *  notice:  As this function need support of QOS, I comment some code out. And when qos is ready, this code need to be support.
 435 ********************************************************************************************************************/
 436 int ieee80211_rx_ADDBARsp(struct ieee80211_device *ieee, struct sk_buff *skb)
 437 {
 438          struct ieee80211_hdr_3addr *rsp = NULL;
 439         PBA_RECORD              pPendingBA, pAdmittedBA;
 440         PTX_TS_RECORD           pTS = NULL;
 441         u8 *dst = NULL, *pDialogToken = NULL, *tag = NULL;
 442         u16 *pStatusCode = NULL, *pBaTimeoutVal = NULL;
 443         PBA_PARAM_SET           pBaParamSet = NULL;
 444         u16                     ReasonCode;
 445
 446         if (skb->len < sizeof(struct ieee80211_hdr_3addr) + 9) {
 447                 IEEE80211_DEBUG(IEEE80211_DL_ERR,
 448                                 " Invalid skb len in BARSP(%d / %zu)\n",
 449                                 skb->len,
 450                                 (sizeof(struct ieee80211_hdr_3addr) + 9));
 451                 return -1;
 452         }
 453         rsp = (struct ieee80211_hdr_3addr *)skb->data;
 454         tag = (u8 *)rsp;
 455         dst = (u8 *)(&rsp->addr2[0]);
 456         tag += sizeof(struct ieee80211_hdr_3addr);
 457         pDialogToken = tag + 2;
 458         pStatusCode = (u16 *)(tag + 3);
 459         pBaParamSet = (PBA_PARAM_SET)(tag + 5);
 460         pBaTimeoutVal = (u16 *)(tag + 7);
 461
 462         // Check the capability
 463         // Since we can always receive A-MPDU, we just check if it is under HT mode.
 464         if (ieee->current_network.qos_data.active == 0  ||
 465             ieee->pHTInfo->bCurrentHTSupport == false ||
 466             ieee->pHTInfo->bCurrentAMPDUEnable == false) {
 467                 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);
 468                 ReasonCode = DELBA_REASON_UNKNOWN_BA;
 469                 goto OnADDBARsp_Reject;
 470         }
 471
 472
 473         //
 474         // Search for related TS.
 475         // If there is no TS found, we wil reject ADDBA Rsp by sending DELBA frame.
 476         //
 477         if (!GetTs(
 478                         ieee,
 479                         (PTS_COMMON_INFO *)(&pTS),
 480                         dst,
 481                         (u8)(pBaParamSet->field.TID),
 482                         TX_DIR,
 483                         false)  )
 484         {
 485                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't get TS in %s()\n", __func__);
 486                 ReasonCode = DELBA_REASON_UNKNOWN_BA;
 487                 goto OnADDBARsp_Reject;
 488         }
 489
 490         pTS->bAddBaReqInProgress = false;
 491         pPendingBA = &pTS->TxPendingBARecord;
 492         pAdmittedBA = &pTS->TxAdmittedBARecord;
 493
 494
 495         //
 496         // Check if related BA is waiting for setup.
 497         // If not, reject by sending DELBA frame.
 498         //
 499         if((pAdmittedBA->bValid==true))
 500         {
 501                 // Since BA is already setup, we ignore all other ADDBA Response.
 502                 IEEE80211_DEBUG(IEEE80211_DL_BA, "OnADDBARsp(): Recv ADDBA Rsp. Drop because already admit it! \n");
 503                 return -1;
 504         }
 505         else if((pPendingBA->bValid == false) ||(*pDialogToken != pPendingBA->DialogToken))
 506         {
 507                 IEEE80211_DEBUG(IEEE80211_DL_ERR,  "OnADDBARsp(): Recv ADDBA Rsp. BA invalid, DELBA! \n");
 508                 ReasonCode = DELBA_REASON_UNKNOWN_BA;
 509                 goto OnADDBARsp_Reject;
 510         }
 511         else
 512         {
 513                 IEEE80211_DEBUG(IEEE80211_DL_BA, "OnADDBARsp(): Recv ADDBA Rsp. BA is admitted! Status code:%X\n", *pStatusCode);
 514                 DeActivateBAEntry(ieee, pPendingBA);
 515         }
 516
 517
 518         if(*pStatusCode == ADDBA_STATUS_SUCCESS)
 519         {
 520                 //
 521                 // Determine ADDBA Rsp content here.
 522                 // We can compare the value of BA parameter set that Peer returned and Self sent.
 523                 // If it is OK, then admitted. Or we can send DELBA to cancel BA mechanism.
 524                 //
 525                 if (pBaParamSet->field.BAPolicy == BA_POLICY_DELAYED)
 526                 {
 527                         // Since this is a kind of ADDBA failed, we delay next ADDBA process.
 528                         pTS->bAddBaReqDelayed = true;
 529                         DeActivateBAEntry(ieee, pAdmittedBA);
 530                         ReasonCode = DELBA_REASON_END_BA;
 531                         goto OnADDBARsp_Reject;
 532                 }
 533
 534
 535                 //
 536                 // Admitted condition
 537                 //
 538                 pAdmittedBA->DialogToken = *pDialogToken;
 539                 pAdmittedBA->BaTimeoutValue = *pBaTimeoutVal;
 540                 pAdmittedBA->BaStartSeqCtrl = pPendingBA->BaStartSeqCtrl;
 541                 pAdmittedBA->BaParamSet = *pBaParamSet;
 542                 DeActivateBAEntry(ieee, pAdmittedBA);
 543                 ActivateBAEntry(ieee, pAdmittedBA, *pBaTimeoutVal);
 544         }
 545         else
 546         {
 547                 // Delay next ADDBA process.
 548                 pTS->bAddBaReqDelayed = true;
 549         }
 550
 551         // End of procedure
 552         return 0;
 553
 554 OnADDBARsp_Reject:
 555         {
 556                 BA_RECORD       BA;
 557                 BA.BaParamSet = *pBaParamSet;
 558                 ieee80211_send_DELBA(ieee, dst, &BA, TX_DIR, ReasonCode);
 559                 return 0;
 560         }
 561
 562 }
 563
 564 /********************************************************************************************************************
 565  *function: RX DELBA
 566  *   input:  struct sk_buff *   skb     //incoming ADDBAReq skb.
 567  *  return:  0(pass), other(fail)
 568  *  notice:  As this function need support of QOS, I comment some code out. And when qos is ready, this code need to be support.
 569 ********************************************************************************************************************/
 570 int ieee80211_rx_DELBA(struct ieee80211_device *ieee, struct sk_buff *skb)
 571 {
 572          struct ieee80211_hdr_3addr *delba = NULL;
 573         PDELBA_PARAM_SET        pDelBaParamSet = NULL;
 574         u16                     *pReasonCode = NULL;
 575         u8                      *dst = NULL;
 576
 577         if (skb->len < sizeof(struct ieee80211_hdr_3addr) + 6) {
 578                 IEEE80211_DEBUG(IEEE80211_DL_ERR,
 579                                 " Invalid skb len in DELBA(%d / %zu)\n",
 580                                 skb->len,
 581                                 (sizeof(struct ieee80211_hdr_3addr) + 6));
 582                 return -1;
 583         }
 584
 585         if (ieee->current_network.qos_data.active == 0 ||
 586                 ieee->pHTInfo->bCurrentHTSupport == false )
 587         {
 588                 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);
 589                 return -1;
 590         }
 591
 592         IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA|IEEE80211_DL_BA, skb->data, skb->len);
 593         delba = (struct ieee80211_hdr_3addr *)skb->data;
 594         dst = (u8 *)(&delba->addr2[0]);
 595         delba += sizeof(struct ieee80211_hdr_3addr);
 596         pDelBaParamSet = (PDELBA_PARAM_SET)(delba+2);
 597         pReasonCode = (u16 *)(delba+4);
 598
 599         if(pDelBaParamSet->field.Initiator == 1)
 600         {
 601                 PRX_TS_RECORD   pRxTs;
 602
 603                 if (!GetTs(
 604                                 ieee,
 605                                 (PTS_COMMON_INFO *)&pRxTs,
 606                                 dst,
 607                                 (u8)pDelBaParamSet->field.TID,
 608                                 RX_DIR,
 609                                 false)  )
 610                 {
 611                         IEEE80211_DEBUG(IEEE80211_DL_ERR,  "can't get TS for RXTS in %s()\n", __func__);
 612                         return -1;
 613                 }
 614
 615                 RxTsDeleteBA(ieee, pRxTs);
 616         }
 617         else
 618         {
 619                 PTX_TS_RECORD   pTxTs;
 620
 621                 if (!GetTs(
 622                         ieee,
 623                         (PTS_COMMON_INFO *)&pTxTs,
 624                         dst,
 625                         (u8)pDelBaParamSet->field.TID,
 626                         TX_DIR,
 627                         false)  )
 628                 {
 629                         IEEE80211_DEBUG(IEEE80211_DL_ERR,  "can't get TS for TXTS in %s()\n", __func__);
 630                         return -1;
 631                 }
 632
 633                 pTxTs->bUsingBa = false;
 634                 pTxTs->bAddBaReqInProgress = false;
 635                 pTxTs->bAddBaReqDelayed = false;
 636                 del_timer_sync(&pTxTs->TsAddBaTimer);
 637                 //PlatformCancelTimer(Adapter, &pTxTs->TsAddBaTimer);
 638                 TxTsDeleteBA(ieee, pTxTs);
 639         }
 640         return 0;
 641 }
 642
 643 //
 644 // ADDBA initiate. This can only be called by TX side.
 645 //
 646 void
 647 TsInitAddBA(
 648         struct ieee80211_device *ieee,
 649         PTX_TS_RECORD   pTS,
 650         u8              Policy,
 651         u8              bOverwritePending
 652         )
 653 {
 654         PBA_RECORD                      pBA = &pTS->TxPendingBARecord;
 655
 656         if(pBA->bValid==true && bOverwritePending==false)
 657                 return;
 658
 659         // Set parameters to "Pending" variable set
 660         DeActivateBAEntry(ieee, pBA);
 661
 662         pBA->DialogToken++;                                             // DialogToken: Only keep the latest dialog token
 663         pBA->BaParamSet.field.AMSDU_Support = 0;        // Do not support A-MSDU with A-MPDU now!!
 664         pBA->BaParamSet.field.BAPolicy = Policy;        // Policy: Delayed or Immediate
 665         pBA->BaParamSet.field.TID = pTS->TsCommonInfo.TSpec.f.TSInfo.field.ucTSID;      // TID
 666         // BufferSize: This need to be set according to A-MPDU vector
 667         pBA->BaParamSet.field.BufferSize = 32;          // BufferSize: This need to be set according to A-MPDU vector
 668         pBA->BaTimeoutValue = 0;                                        // Timeout value: Set 0 to disable Timer
 669         pBA->BaStartSeqCtrl.field.SeqNum = (pTS->TxCurSeq + 3) % 4096;  // Block Ack will start after 3 packets later.
 670
 671         ActivateBAEntry(ieee, pBA, BA_SETUP_TIMEOUT);
 672
 673         ieee80211_send_ADDBAReq(ieee, pTS->TsCommonInfo.Addr, pBA);
 674 }
 675
 676 void
 677 TsInitDelBA( struct ieee80211_device *ieee, PTS_COMMON_INFO pTsCommonInfo, TR_SELECT TxRxSelect)
 678 {
 679
 680         if(TxRxSelect == TX_DIR)
 681         {
 682                 PTX_TS_RECORD   pTxTs = (PTX_TS_RECORD)pTsCommonInfo;
 683
 684                 if(TxTsDeleteBA(ieee, pTxTs))
 685                         ieee80211_send_DELBA(
 686                                 ieee,
 687                                 pTsCommonInfo->Addr,
 688                                 (pTxTs->TxAdmittedBARecord.bValid)?(&pTxTs->TxAdmittedBARecord):(&pTxTs->TxPendingBARecord),
 689                                 TxRxSelect,
 690                                 DELBA_REASON_END_BA);
 691         }
 692         else if(TxRxSelect == RX_DIR)
 693         {
 694                 PRX_TS_RECORD   pRxTs = (PRX_TS_RECORD)pTsCommonInfo;
 695                 if(RxTsDeleteBA(ieee, pRxTs))
 696                         ieee80211_send_DELBA(
 697                                 ieee,
 698                                 pTsCommonInfo->Addr,
 699                                 &pRxTs->RxAdmittedBARecord,
 700                                 TxRxSelect,
 701                                 DELBA_REASON_END_BA     );
 702         }
 703 }
 704 /********************************************************************************************************************
 705  *function:  BA setup timer
 706  *   input:  unsigned long       data           //acturally we send TX_TS_RECORD or RX_TS_RECORD to these timer
 707  *  return:  NULL
 708  *  notice:
 709 ********************************************************************************************************************/
 710 void BaSetupTimeOut(unsigned long data)
 711 {
 712         PTX_TS_RECORD   pTxTs = (PTX_TS_RECORD)data;
 713
 714         pTxTs->bAddBaReqInProgress = false;
 715         pTxTs->bAddBaReqDelayed = true;
 716         pTxTs->TxPendingBARecord.bValid = false;
 717 }
 718
 719 void TxBaInactTimeout(unsigned long data)
 720 {
 721         PTX_TS_RECORD   pTxTs = (PTX_TS_RECORD)data;
 722         struct ieee80211_device *ieee = container_of(pTxTs, struct ieee80211_device, TxTsRecord[pTxTs->num]);
 723         TxTsDeleteBA(ieee, pTxTs);
 724         ieee80211_send_DELBA(
 725                 ieee,
 726                 pTxTs->TsCommonInfo.Addr,
 727                 &pTxTs->TxAdmittedBARecord,
 728                 TX_DIR,
 729                 DELBA_REASON_TIMEOUT);
 730 }
 731
 732 void RxBaInactTimeout(unsigned long data)
 733 {
 734         PRX_TS_RECORD   pRxTs = (PRX_TS_RECORD)data;
 735         struct ieee80211_device *ieee = container_of(pRxTs, struct ieee80211_device, RxTsRecord[pRxTs->num]);
 736
 737         RxTsDeleteBA(ieee, pRxTs);
 738         ieee80211_send_DELBA(
 739                 ieee,
 740                 pRxTs->TsCommonInfo.Addr,
 741                 &pRxTs->RxAdmittedBARecord,
 742                 RX_DIR,
 743                 DELBA_REASON_TIMEOUT);
 744         return ;
 745 }