drivers/staging/rtl8192u/ieee80211/rtl819x_BAProc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /********************************************************************************************************************************
   3  * 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
   4  * 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
   5  * ADDBAREQ ADDBARSP and DELBA packet is still on consideration. Temporarily use MANAGE QUEUE instead of Normal Queue.
   6  * WB 2008-05-27
   7  * *****************************************************************************************************************************/
   8 #include <asm/byteorder.h>
   9 #include <asm/unaligned.h>
  10 #include "ieee80211.h"
  11 #include "rtl819x_BA.h"
  12
  13 /********************************************************************************************************************
  14  *function:  Activate BA entry. And if Time is nozero, start timer.
  15  *   input:  PBA_RECORD                 pBA  //BA entry to be enabled
  16  *           u16                        Time //indicate time delay.
  17  *  output:  none
  18  ********************************************************************************************************************/
  19 static void ActivateBAEntry(struct ieee80211_device *ieee, PBA_RECORD pBA, u16 Time)
  20 {
  21         pBA->bValid = true;
  22         if (Time != 0)
  23                 mod_timer(&pBA->Timer, jiffies + msecs_to_jiffies(Time));
  24 }
  25
  26 /********************************************************************************************************************
  27  *function:  deactivate BA entry, including its timer.
  28  *   input:  PBA_RECORD                 pBA  //BA entry to be disabled
  29  *  output:  none
  30  ********************************************************************************************************************/
  31 static void DeActivateBAEntry(struct ieee80211_device *ieee, PBA_RECORD pBA)
  32 {
  33         pBA->bValid = false;
  34         del_timer_sync(&pBA->Timer);
  35 }
  36 /********************************************************************************************************************
  37  *function: deactivete BA entry in Tx Ts, and send DELBA.
  38  *   input:
  39  *           struct tx_ts_record *pTxTs //Tx Ts which is to deactivate BA entry.
  40  *  output:  none
  41  *  notice:  As struct tx_ts_record * structure will be defined in QOS, so wait to be merged. //FIXME
  42  ********************************************************************************************************************/
  43 static u8 TxTsDeleteBA(struct ieee80211_device *ieee, struct tx_ts_record *pTxTs)
  44 {
  45         PBA_RECORD              pAdmittedBa = &pTxTs->TxAdmittedBARecord;  //These two BA entries must exist in TS structure
  46         PBA_RECORD              pPendingBa = &pTxTs->TxPendingBARecord;
  47         u8                      bSendDELBA = false;
  48
  49         // Delete pending BA
  50         if (pPendingBa->bValid) {
  51                 DeActivateBAEntry(ieee, pPendingBa);
  52                 bSendDELBA = true;
  53         }
  54
  55         // Delete admitted BA
  56         if (pAdmittedBa->bValid) {
  57                 DeActivateBAEntry(ieee, pAdmittedBa);
  58                 bSendDELBA = true;
  59         }
  60
  61         return bSendDELBA;
  62 }
  63
  64 /********************************************************************************************************************
  65  *function: deactivete BA entry in Tx Ts, and send DELBA.
  66  *   input:
  67  *           PRX_TS_RECORD              pRxTs //Rx Ts which is to deactivate BA entry.
  68  *  output:  none
  69  *  notice:  As PRX_TS_RECORD structure will be defined in QOS, so wait to be merged. //FIXME, same with above
  70  ********************************************************************************************************************/
  71 static u8 RxTsDeleteBA(struct ieee80211_device *ieee, PRX_TS_RECORD pRxTs)
  72 {
  73         PBA_RECORD              pBa = &pRxTs->RxAdmittedBARecord;
  74         u8                      bSendDELBA = false;
  75
  76         if (pBa->bValid) {
  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 rtl_80211_hdr_3addr *BAReq = NULL;
 112         u8 *tag = NULL;
 113         u16 len = ieee->tx_headroom + 9;
 114         //category(1) + action field(1) + Dialog Token(1) + BA Parameter Set(2) +  BA Timeout Value(2) +  BA Start SeqCtrl(2)(or StatusCode(2))
 115         IEEE80211_DEBUG(IEEE80211_DL_TRACE | IEEE80211_DL_BA, "========>%s(), frame(%d) sentd to:%pM, ieee->dev:%p\n", __func__, type, Dst, ieee->dev);
 116         if (pBA == NULL) {
 117                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "pBA is NULL\n");
 118                 return NULL;
 119         }
 120         skb = dev_alloc_skb(len + sizeof(struct rtl_80211_hdr_3addr)); //need to add something others? FIXME
 121         if (!skb) {
 122                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't alloc skb for ADDBA_REQ\n");
 123                 return NULL;
 124         }
 125
 126         memset(skb->data, 0, sizeof(struct rtl_80211_hdr_3addr));       //I wonder whether it's necessary. Apparently kernel will not do it when alloc a skb.
 127         skb_reserve(skb, ieee->tx_headroom);
 128
 129         BAReq = skb_put(skb, sizeof(struct rtl_80211_hdr_3addr));
 130
 131         memcpy(BAReq->addr1, Dst, ETH_ALEN);
 132         memcpy(BAReq->addr2, ieee->dev->dev_addr, ETH_ALEN);
 133
 134         memcpy(BAReq->addr3, ieee->current_network.bssid, ETH_ALEN);
 135
 136         BAReq->frame_ctl = cpu_to_le16(IEEE80211_STYPE_MANAGE_ACT); //action frame
 137
 138         //tag += sizeof( struct rtl_80211_hdr_3addr); //move to action field
 139         tag = skb_put(skb, 9);
 140         *tag++ = ACT_CAT_BA;
 141         *tag++ = type;
 142         // Dialog Token
 143         *tag++ = pBA->DialogToken;
 144
 145         if (ACT_ADDBARSP == type) {
 146                 // Status Code
 147                 netdev_info(ieee->dev, "=====>to send ADDBARSP\n");
 148
 149                 put_unaligned_le16(StatusCode, tag);
 150                 tag += 2;
 151         }
 152         // BA Parameter Set
 153
 154         put_unaligned_le16(pBA->BaParamSet.shortData, tag);
 155         tag += 2;
 156         // BA Timeout Value
 157
 158         put_unaligned_le16(pBA->BaTimeoutValue, tag);
 159         tag += 2;
 160
 161         if (ACT_ADDBAREQ == type) {
 162         // BA Start SeqCtrl
 163                 memcpy(tag, (u8 *)&(pBA->BaStartSeqCtrl), 2);
 164                 tag += 2;
 165         }
 166
 167         IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA|IEEE80211_DL_BA, skb->data, skb->len);
 168         return skb;
 169         //return NULL;
 170 }
 171
 172
 173 /********************************************************************************************************************
 174  *function:  construct DELBA frame
 175  *   input:  u8*                dst     //DELBA frame's destination
 176  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA
 177  *           enum tr_select     TxRxSelect  //TX RX direction
 178  *           u16                ReasonCode  //status code.
 179  *  output:  none
 180  *  return:  sk_buff*           skb     //return constructed skb to xmit
 181  ********************************************************************************************************************/
 182 static struct sk_buff *ieee80211_DELBA(
 183         struct ieee80211_device  *ieee,
 184         u8                       *dst,
 185         PBA_RECORD               pBA,
 186         enum tr_select           TxRxSelect,
 187         u16                      ReasonCode
 188         )
 189 {
 190         DELBA_PARAM_SET DelbaParamSet;
 191         struct sk_buff *skb = NULL;
 192          struct rtl_80211_hdr_3addr *Delba = NULL;
 193         u8 *tag = NULL;
 194         //len = head len + DELBA Parameter Set(2) + Reason Code(2)
 195         u16 len = 6 + ieee->tx_headroom;
 196
 197         if (net_ratelimit())
 198                 IEEE80211_DEBUG(IEEE80211_DL_TRACE | IEEE80211_DL_BA,
 199                                 "========>%s(), ReasonCode(%d) sentd to:%pM\n",
 200                                 __func__, ReasonCode, dst);
 201
 202         memset(&DelbaParamSet, 0, 2);
 203
 204         DelbaParamSet.field.Initiator   = (TxRxSelect == TX_DIR) ? 1 : 0;
 205         DelbaParamSet.field.TID = pBA->BaParamSet.field.TID;
 206
 207         skb = dev_alloc_skb(len + sizeof(struct rtl_80211_hdr_3addr)); //need to add something others? FIXME
 208         if (!skb) {
 209                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't alloc skb for ADDBA_REQ\n");
 210                 return NULL;
 211         }
 212 //      memset(skb->data, 0, len+sizeof( struct rtl_80211_hdr_3addr));
 213         skb_reserve(skb, ieee->tx_headroom);
 214
 215         Delba = skb_put(skb, sizeof(struct rtl_80211_hdr_3addr));
 216
 217         memcpy(Delba->addr1, dst, ETH_ALEN);
 218         memcpy(Delba->addr2, ieee->dev->dev_addr, ETH_ALEN);
 219         memcpy(Delba->addr3, ieee->current_network.bssid, ETH_ALEN);
 220         Delba->frame_ctl = cpu_to_le16(IEEE80211_STYPE_MANAGE_ACT); //action frame
 221
 222         tag = skb_put(skb, 6);
 223
 224         *tag++ = ACT_CAT_BA;
 225         *tag++ = ACT_DELBA;
 226
 227         // DELBA Parameter Set
 228
 229         put_unaligned_le16(DelbaParamSet.shortData, tag);
 230         tag += 2;
 231         // Reason Code
 232
 233         put_unaligned_le16(ReasonCode, tag);
 234         tag += 2;
 235
 236         IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA|IEEE80211_DL_BA, skb->data, skb->len);
 237         if (net_ratelimit())
 238                 IEEE80211_DEBUG(IEEE80211_DL_TRACE | IEEE80211_DL_BA,
 239                                 "<=====%s()\n", __func__);
 240         return skb;
 241 }
 242
 243 /********************************************************************************************************************
 244  *function: send ADDBAReq frame out
 245  *   input:  u8*                dst     //ADDBAReq frame's destination
 246  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA
 247  *  output:  none
 248  *  notice: If any possible, please hide pBA in ieee. And temporarily use Manage Queue as softmac_mgmt_xmit() usually does
 249  ********************************************************************************************************************/
 250 static void ieee80211_send_ADDBAReq(struct ieee80211_device *ieee,
 251                                     u8 *dst, PBA_RECORD pBA)
 252 {
 253         struct sk_buff *skb;
 254         skb = ieee80211_ADDBA(ieee, dst, pBA, 0, ACT_ADDBAREQ); //construct ACT_ADDBAREQ frames so set statuscode zero.
 255
 256         if (skb) {
 257                 softmac_mgmt_xmit(skb, ieee);
 258                 //add statistic needed here.
 259                 //and skb will be freed in softmac_mgmt_xmit(), so omit all dev_kfree_skb_any() outside softmac_mgmt_xmit()
 260                 //WB
 261         } else {
 262                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "alloc skb error in function %s()\n", __func__);
 263         }
 264 }
 265
 266 /********************************************************************************************************************
 267  *function: send ADDBARSP frame out
 268  *   input:  u8*                dst     //DELBA frame's destination
 269  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA
 270  *           u16                StatusCode //RSP StatusCode
 271  *  output:  none
 272  *  notice: If any possible, please hide pBA in ieee. And temporarily use Manage Queue as softmac_mgmt_xmit() usually does
 273  ********************************************************************************************************************/
 274 static void ieee80211_send_ADDBARsp(struct ieee80211_device *ieee, u8 *dst,
 275                                     PBA_RECORD pBA, u16 StatusCode)
 276 {
 277         struct sk_buff *skb;
 278         skb = ieee80211_ADDBA(ieee, dst, pBA, StatusCode, ACT_ADDBARSP); //construct ACT_ADDBARSP frames
 279         if (skb) {
 280                 softmac_mgmt_xmit(skb, ieee);
 281                 //same above
 282         } else {
 283                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "alloc skb error in function %s()\n", __func__);
 284         }
 285
 286         return;
 287
 288 }
 289 /********************************************************************************************************************
 290  *function: send ADDBARSP frame out
 291  *   input:  u8*                dst     //DELBA frame's destination
 292  *           PBA_RECORD         pBA     //BA_RECORD entry which stores the necessary information for BA
 293  *           enum tr_select     TxRxSelect //TX or RX
 294  *           u16                ReasonCode //DEL ReasonCode
 295  *  output:  none
 296  *  notice: If any possible, please hide pBA in ieee. And temporarily use Manage Queue as softmac_mgmt_xmit() usually does
 297  ********************************************************************************************************************/
 298
 299 static void ieee80211_send_DELBA(struct ieee80211_device *ieee, u8 *dst,
 300                                  PBA_RECORD pBA, enum tr_select TxRxSelect,
 301                                  u16 ReasonCode)
 302 {
 303         struct sk_buff *skb;
 304         skb = ieee80211_DELBA(ieee, dst, pBA, TxRxSelect, ReasonCode); //construct ACT_ADDBARSP frames
 305         if (skb) {
 306                 softmac_mgmt_xmit(skb, ieee);
 307                 //same above
 308         } else {
 309                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "alloc skb error in function %s()\n", __func__);
 310         }
 311 }
 312
 313 /********************************************************************************************************************
 314  *function: RX ADDBAReq
 315  *   input:  struct sk_buff *   skb     //incoming ADDBAReq skb.
 316  *  return:  0(pass), other(fail)
 317  *  notice:  As this function need support of QOS, I comment some code out. And when qos is ready, this code need to be support.
 318  ********************************************************************************************************************/
 319 int ieee80211_rx_ADDBAReq(struct ieee80211_device *ieee, struct sk_buff *skb)
 320 {
 321          struct rtl_80211_hdr_3addr *req = NULL;
 322         u16 rc = 0;
 323         u8 *dst = NULL, *pDialogToken = NULL, *tag = NULL;
 324         PBA_RECORD pBA = NULL;
 325         PBA_PARAM_SET   pBaParamSet = NULL;
 326         u16 *pBaTimeoutVal = NULL;
 327         PSEQUENCE_CONTROL pBaStartSeqCtrl = NULL;
 328         PRX_TS_RECORD   pTS = NULL;
 329
 330         if (skb->len < sizeof(struct rtl_80211_hdr_3addr) + 9) {
 331                 IEEE80211_DEBUG(IEEE80211_DL_ERR,
 332                                 " Invalid skb len in BAREQ(%d / %zu)\n",
 333                                 skb->len,
 334                                 (sizeof(struct rtl_80211_hdr_3addr) + 9));
 335                 return -1;
 336         }
 337
 338         IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA|IEEE80211_DL_BA, skb->data, skb->len);
 339
 340         req = (struct rtl_80211_hdr_3addr *) skb->data;
 341         tag = (u8 *)req;
 342         dst = &req->addr2[0];
 343         tag += sizeof(struct rtl_80211_hdr_3addr);
 344         pDialogToken = tag + 2;  //category+action
 345         pBaParamSet = (PBA_PARAM_SET)(tag + 3);   //+DialogToken
 346         pBaTimeoutVal = (u16 *)(tag + 5);
 347         pBaStartSeqCtrl = (PSEQUENCE_CONTROL)(req + 7);
 348
 349         netdev_info(ieee->dev, "====================>rx ADDBAREQ from :%pM\n", dst);
 350 //some other capability is not ready now.
 351         if ((ieee->current_network.qos_data.active == 0) ||
 352                 (!ieee->pHTInfo->bCurrentHTSupport)) //||
 353         //      (!ieee->pStaQos->bEnableRxImmBA)        )
 354         {
 355                 rc = ADDBA_STATUS_REFUSED;
 356                 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);
 357                 goto OnADDBAReq_Fail;
 358         }
 359         // Search for related traffic stream.
 360         // If there is no matched TS, reject the ADDBA request.
 361         if (!GetTs(
 362                         ieee,
 363                         (struct ts_common_info **)(&pTS),
 364                         dst,
 365                         (u8)(pBaParamSet->field.TID),
 366                         RX_DIR,
 367                         true)) {
 368                 rc = ADDBA_STATUS_REFUSED;
 369                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't get TS in %s()\n", __func__);
 370                 goto OnADDBAReq_Fail;
 371         }
 372         pBA = &pTS->RxAdmittedBARecord;
 373         // To Determine the ADDBA Req content
 374         // We can do much more check here, including BufferSize, AMSDU_Support, Policy, StartSeqCtrl...
 375         // I want to check StartSeqCtrl to make sure when we start aggregation!!!
 376         //
 377         if (pBaParamSet->field.BAPolicy == BA_POLICY_DELAYED) {
 378                 rc = ADDBA_STATUS_INVALID_PARAM;
 379                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "BA Policy is not correct in %s()\n", __func__);
 380                 goto OnADDBAReq_Fail;
 381         }
 382                 // Admit the ADDBA Request
 383         //
 384         DeActivateBAEntry(ieee, pBA);
 385         pBA->DialogToken = *pDialogToken;
 386         pBA->BaParamSet = *pBaParamSet;
 387         pBA->BaTimeoutValue = *pBaTimeoutVal;
 388         pBA->BaStartSeqCtrl = *pBaStartSeqCtrl;
 389         //for half N mode we only aggregate 1 frame
 390         if (ieee->GetHalfNmodeSupportByAPsHandler(ieee->dev))
 391         pBA->BaParamSet.field.BufferSize = 1;
 392         else
 393         pBA->BaParamSet.field.BufferSize = 32;
 394         ActivateBAEntry(ieee, pBA, pBA->BaTimeoutValue);
 395         ieee80211_send_ADDBARsp(ieee, dst, pBA, ADDBA_STATUS_SUCCESS);
 396
 397         // End of procedure.
 398         return 0;
 399
 400 OnADDBAReq_Fail:
 401         {
 402                 BA_RECORD       BA;
 403                 BA.BaParamSet = *pBaParamSet;
 404                 BA.BaTimeoutValue = *pBaTimeoutVal;
 405                 BA.DialogToken = *pDialogToken;
 406                 BA.BaParamSet.field.BAPolicy = BA_POLICY_IMMEDIATE;
 407                 ieee80211_send_ADDBARsp(ieee, dst, &BA, rc);
 408                 return 0; //we send RSP out.
 409         }
 410
 411 }
 412
 413 /********************************************************************************************************************
 414  *function: RX ADDBARSP
 415  *   input:  struct sk_buff *   skb     //incoming ADDBAReq skb.
 416  *  return:  0(pass), other(fail)
 417  *  notice:  As this function need support of QOS, I comment some code out. And when qos is ready, this code need to be support.
 418  ********************************************************************************************************************/
 419 int ieee80211_rx_ADDBARsp(struct ieee80211_device *ieee, struct sk_buff *skb)
 420 {
 421          struct rtl_80211_hdr_3addr *rsp = NULL;
 422         PBA_RECORD              pPendingBA, pAdmittedBA;
 423         struct tx_ts_record     *pTS = NULL;
 424         u8 *dst = NULL, *pDialogToken = NULL, *tag = NULL;
 425         u16 *pStatusCode = NULL, *pBaTimeoutVal = NULL;
 426         PBA_PARAM_SET           pBaParamSet = NULL;
 427         u16                     ReasonCode;
 428
 429         if (skb->len < sizeof(struct rtl_80211_hdr_3addr) + 9) {
 430                 IEEE80211_DEBUG(IEEE80211_DL_ERR,
 431                                 " Invalid skb len in BARSP(%d / %zu)\n",
 432                                 skb->len,
 433                                 (sizeof(struct rtl_80211_hdr_3addr) + 9));
 434                 return -1;
 435         }
 436         rsp = (struct rtl_80211_hdr_3addr *)skb->data;
 437         tag = (u8 *)rsp;
 438         dst = &rsp->addr2[0];
 439         tag += sizeof(struct rtl_80211_hdr_3addr);
 440         pDialogToken = tag + 2;
 441         pStatusCode = (u16 *)(tag + 3);
 442         pBaParamSet = (PBA_PARAM_SET)(tag + 5);
 443         pBaTimeoutVal = (u16 *)(tag + 7);
 444
 445         // Check the capability
 446         // Since we can always receive A-MPDU, we just check if it is under HT mode.
 447         if (ieee->current_network.qos_data.active == 0  ||
 448             !ieee->pHTInfo->bCurrentHTSupport ||
 449             !ieee->pHTInfo->bCurrentAMPDUEnable) {
 450                 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);
 451                 ReasonCode = DELBA_REASON_UNKNOWN_BA;
 452                 goto OnADDBARsp_Reject;
 453         }
 454
 455
 456         //
 457         // Search for related TS.
 458         // If there is no TS found, we wil reject ADDBA Rsp by sending DELBA frame.
 459         //
 460         if (!GetTs(
 461                         ieee,
 462                         (struct ts_common_info **)(&pTS),
 463                         dst,
 464                         (u8)(pBaParamSet->field.TID),
 465                         TX_DIR,
 466                         false)) {
 467                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "can't get TS in %s()\n", __func__);
 468                 ReasonCode = DELBA_REASON_UNKNOWN_BA;
 469                 goto OnADDBARsp_Reject;
 470         }
 471
 472         pTS->bAddBaReqInProgress = false;
 473         pPendingBA = &pTS->TxPendingBARecord;
 474         pAdmittedBA = &pTS->TxAdmittedBARecord;
 475
 476
 477         //
 478         // Check if related BA is waiting for setup.
 479         // If not, reject by sending DELBA frame.
 480         //
 481         if (pAdmittedBA->bValid) {
 482                 // Since BA is already setup, we ignore all other ADDBA Response.
 483                 IEEE80211_DEBUG(IEEE80211_DL_BA, "OnADDBARsp(): Recv ADDBA Rsp. Drop because already admit it! \n");
 484                 return -1;
 485         } else if ((!pPendingBA->bValid) || (*pDialogToken != pPendingBA->DialogToken)) {
 486                 IEEE80211_DEBUG(IEEE80211_DL_ERR,  "OnADDBARsp(): Recv ADDBA Rsp. BA invalid, DELBA! \n");
 487                 ReasonCode = DELBA_REASON_UNKNOWN_BA;
 488                 goto OnADDBARsp_Reject;
 489         } else {
 490                 IEEE80211_DEBUG(IEEE80211_DL_BA, "OnADDBARsp(): Recv ADDBA Rsp. BA is admitted! Status code:%X\n", *pStatusCode);
 491                 DeActivateBAEntry(ieee, pPendingBA);
 492         }
 493
 494
 495         if (*pStatusCode == ADDBA_STATUS_SUCCESS) {
 496                 //
 497                 // Determine ADDBA Rsp content here.
 498                 // We can compare the value of BA parameter set that Peer returned and Self sent.
 499                 // If it is OK, then admitted. Or we can send DELBA to cancel BA mechanism.
 500                 //
 501                 if (pBaParamSet->field.BAPolicy == BA_POLICY_DELAYED) {
 502                         // Since this is a kind of ADDBA failed, we delay next ADDBA process.
 503                         pTS->bAddBaReqDelayed = true;
 504                         DeActivateBAEntry(ieee, pAdmittedBA);
 505                         ReasonCode = DELBA_REASON_END_BA;
 506                         goto OnADDBARsp_Reject;
 507                 }
 508
 509
 510                 //
 511                 // Admitted condition
 512                 //
 513                 pAdmittedBA->DialogToken = *pDialogToken;
 514                 pAdmittedBA->BaTimeoutValue = *pBaTimeoutVal;
 515                 pAdmittedBA->BaStartSeqCtrl = pPendingBA->BaStartSeqCtrl;
 516                 pAdmittedBA->BaParamSet = *pBaParamSet;
 517                 DeActivateBAEntry(ieee, pAdmittedBA);
 518                 ActivateBAEntry(ieee, pAdmittedBA, *pBaTimeoutVal);
 519         } else {
 520                 // Delay next ADDBA process.
 521                 pTS->bAddBaReqDelayed = true;
 522         }
 523
 524         // End of procedure
 525         return 0;
 526
 527 OnADDBARsp_Reject:
 528         {
 529                 BA_RECORD       BA;
 530                 BA.BaParamSet = *pBaParamSet;
 531                 ieee80211_send_DELBA(ieee, dst, &BA, TX_DIR, ReasonCode);
 532                 return 0;
 533         }
 534
 535 }
 536
 537 /********************************************************************************************************************
 538  *function: RX DELBA
 539  *   input:  struct sk_buff *   skb     //incoming ADDBAReq skb.
 540  *  return:  0(pass), other(fail)
 541  *  notice:  As this function need support of QOS, I comment some code out. And when qos is ready, this code need to be support.
 542  ********************************************************************************************************************/
 543 int ieee80211_rx_DELBA(struct ieee80211_device *ieee, struct sk_buff *skb)
 544 {
 545          struct rtl_80211_hdr_3addr *delba = NULL;
 546         PDELBA_PARAM_SET        pDelBaParamSet = NULL;
 547         u8                      *dst = NULL;
 548
 549         if (skb->len < sizeof(struct rtl_80211_hdr_3addr) + 6) {
 550                 IEEE80211_DEBUG(IEEE80211_DL_ERR,
 551                                 " Invalid skb len in DELBA(%d / %zu)\n",
 552                                 skb->len,
 553                                 (sizeof(struct rtl_80211_hdr_3addr) + 6));
 554                 return -1;
 555         }
 556
 557         if (ieee->current_network.qos_data.active == 0 ||
 558             !ieee->pHTInfo->bCurrentHTSupport) {
 559                 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);
 560                 return -1;
 561         }
 562
 563         IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA|IEEE80211_DL_BA, skb->data, skb->len);
 564         delba = (struct rtl_80211_hdr_3addr *)skb->data;
 565         dst = &delba->addr2[0];
 566         pDelBaParamSet = (PDELBA_PARAM_SET)&delba->payload[2];
 567
 568         if (pDelBaParamSet->field.Initiator == 1) {
 569                 PRX_TS_RECORD   pRxTs;
 570
 571                 if (!GetTs(
 572                                 ieee,
 573                                 (struct ts_common_info **)&pRxTs,
 574                                 dst,
 575                                 (u8)pDelBaParamSet->field.TID,
 576                                 RX_DIR,
 577                                 false)) {
 578                         IEEE80211_DEBUG(IEEE80211_DL_ERR,  "can't get TS for RXTS in %s()\n", __func__);
 579                         return -1;
 580                 }
 581
 582                 RxTsDeleteBA(ieee, pRxTs);
 583         } else {
 584                 struct tx_ts_record *pTxTs;
 585
 586                 if (!GetTs(
 587                         ieee,
 588                         (struct ts_common_info **)&pTxTs,
 589                         dst,
 590                         (u8)pDelBaParamSet->field.TID,
 591                         TX_DIR,
 592                         false)) {
 593                         IEEE80211_DEBUG(IEEE80211_DL_ERR,  "can't get TS for TXTS in %s()\n", __func__);
 594                         return -1;
 595                 }
 596
 597                 pTxTs->bUsingBa = false;
 598                 pTxTs->bAddBaReqInProgress = false;
 599                 pTxTs->bAddBaReqDelayed = false;
 600                 del_timer_sync(&pTxTs->TsAddBaTimer);
 601                 //PlatformCancelTimer(Adapter, &pTxTs->TsAddBaTimer);
 602                 TxTsDeleteBA(ieee, pTxTs);
 603         }
 604         return 0;
 605 }
 606
 607 //
 608 // ADDBA initiate. This can only be called by TX side.
 609 //
 610 void
 611 TsInitAddBA(
 612         struct ieee80211_device *ieee,
 613         struct tx_ts_record     *pTS,
 614         u8              Policy,
 615         u8              bOverwritePending
 616         )
 617 {
 618         PBA_RECORD                      pBA = &pTS->TxPendingBARecord;
 619
 620         if (pBA->bValid && !bOverwritePending)
 621                 return;
 622
 623         // Set parameters to "Pending" variable set
 624         DeActivateBAEntry(ieee, pBA);
 625
 626         pBA->DialogToken++;                                             // DialogToken: Only keep the latest dialog token
 627         pBA->BaParamSet.field.AMSDU_Support = 0;        // Do not support A-MSDU with A-MPDU now!!
 628         pBA->BaParamSet.field.BAPolicy = Policy;        // Policy: Delayed or Immediate
 629         pBA->BaParamSet.field.TID = pTS->TsCommonInfo.t_spec.f.TSInfo.field.ucTSID;     // TID
 630         // BufferSize: This need to be set according to A-MPDU vector
 631         pBA->BaParamSet.field.BufferSize = 32;          // BufferSize: This need to be set according to A-MPDU vector
 632         pBA->BaTimeoutValue = 0;                                        // Timeout value: Set 0 to disable Timer
 633         pBA->BaStartSeqCtrl.field.SeqNum = (pTS->TxCurSeq + 3) % 4096;  // Block Ack will start after 3 packets later.
 634
 635         ActivateBAEntry(ieee, pBA, BA_SETUP_TIMEOUT);
 636
 637         ieee80211_send_ADDBAReq(ieee, pTS->TsCommonInfo.addr, pBA);
 638 }
 639
 640 void
 641 TsInitDelBA(struct ieee80211_device *ieee, struct ts_common_info *pTsCommonInfo, enum tr_select TxRxSelect)
 642 {
 643         if (TxRxSelect == TX_DIR) {
 644                 struct tx_ts_record *pTxTs = (struct tx_ts_record *)pTsCommonInfo;
 645
 646                 if (TxTsDeleteBA(ieee, pTxTs))
 647                         ieee80211_send_DELBA(
 648                                 ieee,
 649                                 pTsCommonInfo->addr,
 650                                 (pTxTs->TxAdmittedBARecord.bValid)?(&pTxTs->TxAdmittedBARecord):(&pTxTs->TxPendingBARecord),
 651                                 TxRxSelect,
 652                                 DELBA_REASON_END_BA);
 653         } else if (TxRxSelect == RX_DIR) {
 654                 PRX_TS_RECORD   pRxTs = (PRX_TS_RECORD)pTsCommonInfo;
 655                 if (RxTsDeleteBA(ieee, pRxTs))
 656                         ieee80211_send_DELBA(
 657                                 ieee,
 658                                 pTsCommonInfo->addr,
 659                                 &pRxTs->RxAdmittedBARecord,
 660                                 TxRxSelect,
 661                                 DELBA_REASON_END_BA);
 662         }
 663 }
 664 /********************************************************************************************************************
 665  *function:  BA setup timer
 666  *   input:  unsigned long       data           //acturally we send struct tx_ts_record or RX_TS_RECORD to these timer
 667  *  return:  NULL
 668  *  notice:
 669  ********************************************************************************************************************/
 670 void BaSetupTimeOut(struct timer_list *t)
 671 {
 672         struct tx_ts_record *pTxTs = from_timer(pTxTs, t, TxPendingBARecord.Timer);
 673
 674         pTxTs->bAddBaReqInProgress = false;
 675         pTxTs->bAddBaReqDelayed = true;
 676         pTxTs->TxPendingBARecord.bValid = false;
 677 }
 678
 679 void TxBaInactTimeout(struct timer_list *t)
 680 {
 681         struct tx_ts_record *pTxTs = from_timer(pTxTs, t, TxAdmittedBARecord.Timer);
 682         struct ieee80211_device *ieee = container_of(pTxTs, struct ieee80211_device, TxTsRecord[pTxTs->num]);
 683         TxTsDeleteBA(ieee, pTxTs);
 684         ieee80211_send_DELBA(
 685                 ieee,
 686                 pTxTs->TsCommonInfo.addr,
 687                 &pTxTs->TxAdmittedBARecord,
 688                 TX_DIR,
 689                 DELBA_REASON_TIMEOUT);
 690 }
 691
 692 void RxBaInactTimeout(struct timer_list *t)
 693 {
 694         PRX_TS_RECORD   pRxTs = from_timer(pRxTs, t, RxAdmittedBARecord.Timer);
 695         struct ieee80211_device *ieee = container_of(pRxTs, struct ieee80211_device, RxTsRecord[pRxTs->num]);
 696
 697         RxTsDeleteBA(ieee, pRxTs);
 698         ieee80211_send_DELBA(
 699                 ieee,
 700                 pRxTs->TsCommonInfo.addr,
 701                 &pRxTs->RxAdmittedBARecord,
 702                 RX_DIR,
 703                 DELBA_REASON_TIMEOUT);
 704 }