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7#include <asm/byteorder.h>
8#include <asm/unaligned.h>
9#include <linux/etherdevice.h>
10#include "rtllib.h"
11#include "rtl819x_BA.h"
12
13static void ActivateBAEntry(struct rtllib_device *ieee, struct ba_record *pBA,
14 u16 Time)
15{
16 pBA->b_valid = true;
17 if (Time != 0)
18 mod_timer(&pBA->timer, jiffies + msecs_to_jiffies(Time));
19}
20
21static void DeActivateBAEntry(struct rtllib_device *ieee, struct ba_record *pBA)
22{
23 pBA->b_valid = false;
24 del_timer_sync(&pBA->timer);
25}
26
27static u8 TxTsDeleteBA(struct rtllib_device *ieee, struct tx_ts_record *pTxTs)
28{
29 struct ba_record *pAdmittedBa = &pTxTs->TxAdmittedBARecord;
30 struct ba_record *pPendingBa = &pTxTs->TxPendingBARecord;
31 u8 bSendDELBA = false;
32
33 if (pPendingBa->b_valid) {
34 DeActivateBAEntry(ieee, pPendingBa);
35 bSendDELBA = true;
36 }
37
38 if (pAdmittedBa->b_valid) {
39 DeActivateBAEntry(ieee, pAdmittedBa);
40 bSendDELBA = true;
41 }
42 return bSendDELBA;
43}
44
45static u8 RxTsDeleteBA(struct rtllib_device *ieee, struct rx_ts_record *pRxTs)
46{
47 struct ba_record *pBa = &pRxTs->rx_admitted_ba_record;
48 u8 bSendDELBA = false;
49
50 if (pBa->b_valid) {
51 DeActivateBAEntry(ieee, pBa);
52 bSendDELBA = true;
53 }
54
55 return bSendDELBA;
56}
57
58void ResetBaEntry(struct ba_record *pBA)
59{
60 pBA->b_valid = false;
61 pBA->ba_param_set.short_data = 0;
62 pBA->ba_timeout_value = 0;
63 pBA->dialog_token = 0;
64 pBA->ba_start_seq_ctrl.short_data = 0;
65}
66static struct sk_buff *rtllib_ADDBA(struct rtllib_device *ieee, u8 *Dst,
67 struct ba_record *pBA,
68 u16 StatusCode, u8 type)
69{
70 struct sk_buff *skb = NULL;
71 struct rtllib_hdr_3addr *BAReq = NULL;
72 u8 *tag = NULL;
73 u16 len = ieee->tx_headroom + 9;
74
75 netdev_dbg(ieee->dev, "%s(): frame(%d) sentd to: %pM, ieee->dev:%p\n",
76 __func__, type, Dst, ieee->dev);
77
78 if (!pBA) {
79 netdev_warn(ieee->dev, "pBA is NULL\n");
80 return NULL;
81 }
82 skb = dev_alloc_skb(len + sizeof(struct rtllib_hdr_3addr));
83 if (!skb)
84 return NULL;
85
86 memset(skb->data, 0, sizeof(struct rtllib_hdr_3addr));
87
88 skb_reserve(skb, ieee->tx_headroom);
89
90 BAReq = skb_put(skb, sizeof(struct rtllib_hdr_3addr));
91
92 ether_addr_copy(BAReq->addr1, Dst);
93 ether_addr_copy(BAReq->addr2, ieee->dev->dev_addr);
94
95 ether_addr_copy(BAReq->addr3, ieee->current_network.bssid);
96 BAReq->frame_ctl = cpu_to_le16(RTLLIB_STYPE_MANAGE_ACT);
97
98 tag = skb_put(skb, 9);
99 *tag++ = ACT_CAT_BA;
100 *tag++ = type;
101 *tag++ = pBA->dialog_token;
102
103 if (type == ACT_ADDBARSP) {
104 RT_TRACE(COMP_DBG, "====>to send ADDBARSP\n");
105
106 put_unaligned_le16(StatusCode, tag);
107 tag += 2;
108 }
109
110 put_unaligned_le16(pBA->ba_param_set.short_data, tag);
111 tag += 2;
112
113 put_unaligned_le16(pBA->ba_timeout_value, tag);
114 tag += 2;
115
116 if (type == ACT_ADDBAREQ) {
117 memcpy(tag, (u8 *)&(pBA->ba_start_seq_ctrl), 2);
118 tag += 2;
119 }
120
121#ifdef VERBOSE_DEBUG
122 print_hex_dump_bytes("%s: ", DUMP_PREFIX_NONE, skb->data,
123 __func__, skb->len);
124#endif
125 return skb;
126}
127
128static struct sk_buff *rtllib_DELBA(struct rtllib_device *ieee, u8 *dst,
129 struct ba_record *pBA,
130 enum tr_select TxRxSelect, u16 ReasonCode)
131{
132 union delba_param_set DelbaParamSet;
133 struct sk_buff *skb = NULL;
134 struct rtllib_hdr_3addr *Delba = NULL;
135 u8 *tag = NULL;
136 u16 len = 6 + ieee->tx_headroom;
137
138 if (net_ratelimit())
139 netdev_dbg(ieee->dev, "%s(): ReasonCode(%d) sentd to: %pM\n",
140 __func__, ReasonCode, dst);
141
142 memset(&DelbaParamSet, 0, 2);
143
144 DelbaParamSet.field.initiator = (TxRxSelect == TX_DIR) ? 1 : 0;
145 DelbaParamSet.field.tid = pBA->ba_param_set.field.tid;
146
147 skb = dev_alloc_skb(len + sizeof(struct rtllib_hdr_3addr));
148 if (!skb)
149 return NULL;
150
151 skb_reserve(skb, ieee->tx_headroom);
152
153 Delba = skb_put(skb, sizeof(struct rtllib_hdr_3addr));
154
155 ether_addr_copy(Delba->addr1, dst);
156 ether_addr_copy(Delba->addr2, ieee->dev->dev_addr);
157 ether_addr_copy(Delba->addr3, ieee->current_network.bssid);
158 Delba->frame_ctl = cpu_to_le16(RTLLIB_STYPE_MANAGE_ACT);
159
160 tag = skb_put(skb, 6);
161
162 *tag++ = ACT_CAT_BA;
163 *tag++ = ACT_DELBA;
164
165
166 put_unaligned_le16(DelbaParamSet.short_data, tag);
167 tag += 2;
168
169 put_unaligned_le16(ReasonCode, tag);
170 tag += 2;
171
172#ifdef VERBOSE_DEBUG
173 print_hex_dump_bytes("%s: ", DUMP_PREFIX_NONE, skb->data,
174 __func__, skb->len);
175#endif
176 return skb;
177}
178
179static void rtllib_send_ADDBAReq(struct rtllib_device *ieee, u8 *dst,
180 struct ba_record *pBA)
181{
182 struct sk_buff *skb;
183
184 skb = rtllib_ADDBA(ieee, dst, pBA, 0, ACT_ADDBAREQ);
185
186 if (skb) {
187 RT_TRACE(COMP_DBG, "====>to send ADDBAREQ!!!!!\n");
188 softmac_mgmt_xmit(skb, ieee);
189 } else {
190 netdev_dbg(ieee->dev, "Failed to generate ADDBAReq packet.\n");
191 }
192}
193
194static void rtllib_send_ADDBARsp(struct rtllib_device *ieee, u8 *dst,
195 struct ba_record *pBA, u16 StatusCode)
196{
197 struct sk_buff *skb;
198
199 skb = rtllib_ADDBA(ieee, dst, pBA, StatusCode, ACT_ADDBARSP);
200 if (skb)
201 softmac_mgmt_xmit(skb, ieee);
202 else
203 netdev_dbg(ieee->dev, "Failed to generate ADDBARsp packet.\n");
204}
205
206static void rtllib_send_DELBA(struct rtllib_device *ieee, u8 *dst,
207 struct ba_record *pBA, enum tr_select TxRxSelect,
208 u16 ReasonCode)
209{
210 struct sk_buff *skb;
211
212 skb = rtllib_DELBA(ieee, dst, pBA, TxRxSelect, ReasonCode);
213 if (skb)
214 softmac_mgmt_xmit(skb, ieee);
215 else
216 netdev_dbg(ieee->dev, "Failed to generate DELBA packet.\n");
217}
218
219int rtllib_rx_ADDBAReq(struct rtllib_device *ieee, struct sk_buff *skb)
220{
221 struct rtllib_hdr_3addr *req = NULL;
222 u16 rc = 0;
223 u8 *dst = NULL, *pDialogToken = NULL, *tag = NULL;
224 struct ba_record *pBA = NULL;
225 union ba_param_set *pBaParamSet = NULL;
226 u16 *pBaTimeoutVal = NULL;
227 union sequence_control *pBaStartSeqCtrl = NULL;
228 struct rx_ts_record *pTS = NULL;
229
230 if (skb->len < sizeof(struct rtllib_hdr_3addr) + 9) {
231 netdev_warn(ieee->dev, "Invalid skb len in BAREQ(%d / %d)\n",
232 (int)skb->len,
233 (int)(sizeof(struct rtllib_hdr_3addr) + 9));
234 return -1;
235 }
236
237#ifdef VERBOSE_DEBUG
238 print_hex_dump_bytes("%s: ", DUMP_PREFIX_NONE, __func__,
239 skb->data, skb->len);
240#endif
241
242 req = (struct rtllib_hdr_3addr *) skb->data;
243 tag = (u8 *)req;
244 dst = (u8 *)(&req->addr2[0]);
245 tag += sizeof(struct rtllib_hdr_3addr);
246 pDialogToken = tag + 2;
247 pBaParamSet = (union ba_param_set *)(tag + 3);
248 pBaTimeoutVal = (u16 *)(tag + 5);
249 pBaStartSeqCtrl = (union sequence_control *)(req + 7);
250
251 RT_TRACE(COMP_DBG, "====>rx ADDBAREQ from : %pM\n", dst);
252 if (!ieee->current_network.qos_data.active ||
253 !ieee->pHTInfo->bCurrentHTSupport ||
254 (ieee->pHTInfo->IOTAction & HT_IOT_ACT_REJECT_ADDBA_REQ)) {
255 rc = ADDBA_STATUS_REFUSED;
256 netdev_warn(ieee->dev,
257 "Failed to reply on ADDBA_REQ as some capability is not ready(%d, %d)\n",
258 ieee->current_network.qos_data.active,
259 ieee->pHTInfo->bCurrentHTSupport);
260 goto OnADDBAReq_Fail;
261 }
262 if (!GetTs(ieee, (struct ts_common_info **)(&pTS), dst,
263 (u8)(pBaParamSet->field.tid), RX_DIR, true)) {
264 rc = ADDBA_STATUS_REFUSED;
265 netdev_warn(ieee->dev, "%s(): can't get TS\n", __func__);
266 goto OnADDBAReq_Fail;
267 }
268 pBA = &pTS->rx_admitted_ba_record;
269
270 if (pBaParamSet->field.ba_policy == BA_POLICY_DELAYED) {
271 rc = ADDBA_STATUS_INVALID_PARAM;
272 netdev_warn(ieee->dev, "%s(): BA Policy is not correct\n",
273 __func__);
274 goto OnADDBAReq_Fail;
275 }
276
277 rtllib_FlushRxTsPendingPkts(ieee, pTS);
278
279 DeActivateBAEntry(ieee, pBA);
280 pBA->dialog_token = *pDialogToken;
281 pBA->ba_param_set = *pBaParamSet;
282 pBA->ba_timeout_value = *pBaTimeoutVal;
283 pBA->ba_start_seq_ctrl = *pBaStartSeqCtrl;
284
285 if (ieee->GetHalfNmodeSupportByAPsHandler(ieee->dev) ||
286 (ieee->pHTInfo->IOTAction & HT_IOT_ACT_ALLOW_PEER_AGG_ONE_PKT))
287 pBA->ba_param_set.field.buffer_size = 1;
288 else
289 pBA->ba_param_set.field.buffer_size = 32;
290
291 ActivateBAEntry(ieee, pBA, 0);
292 rtllib_send_ADDBARsp(ieee, dst, pBA, ADDBA_STATUS_SUCCESS);
293
294 return 0;
295
296OnADDBAReq_Fail:
297 {
298 struct ba_record BA;
299
300 BA.ba_param_set = *pBaParamSet;
301 BA.ba_timeout_value = *pBaTimeoutVal;
302 BA.dialog_token = *pDialogToken;
303 BA.ba_param_set.field.ba_policy = BA_POLICY_IMMEDIATE;
304 rtllib_send_ADDBARsp(ieee, dst, &BA, rc);
305 return 0;
306 }
307}
308
309int rtllib_rx_ADDBARsp(struct rtllib_device *ieee, struct sk_buff *skb)
310{
311 struct rtllib_hdr_3addr *rsp = NULL;
312 struct ba_record *pPendingBA, *pAdmittedBA;
313 struct tx_ts_record *pTS = NULL;
314 u8 *dst = NULL, *pDialogToken = NULL, *tag = NULL;
315 u16 *pStatusCode = NULL, *pBaTimeoutVal = NULL;
316 union ba_param_set *pBaParamSet = NULL;
317 u16 ReasonCode;
318
319 if (skb->len < sizeof(struct rtllib_hdr_3addr) + 9) {
320 netdev_warn(ieee->dev, "Invalid skb len in BARSP(%d / %d)\n",
321 (int)skb->len,
322 (int)(sizeof(struct rtllib_hdr_3addr) + 9));
323 return -1;
324 }
325 rsp = (struct rtllib_hdr_3addr *)skb->data;
326 tag = (u8 *)rsp;
327 dst = (u8 *)(&rsp->addr2[0]);
328 tag += sizeof(struct rtllib_hdr_3addr);
329 pDialogToken = tag + 2;
330 pStatusCode = (u16 *)(tag + 3);
331 pBaParamSet = (union ba_param_set *)(tag + 5);
332 pBaTimeoutVal = (u16 *)(tag + 7);
333
334 RT_TRACE(COMP_DBG, "====>rx ADDBARSP from : %pM\n", dst);
335 if (!ieee->current_network.qos_data.active ||
336 !ieee->pHTInfo->bCurrentHTSupport ||
337 !ieee->pHTInfo->bCurrentAMPDUEnable) {
338 netdev_warn(ieee->dev,
339 "reject to ADDBA_RSP as some capability is not ready(%d, %d, %d)\n",
340 ieee->current_network.qos_data.active,
341 ieee->pHTInfo->bCurrentHTSupport,
342 ieee->pHTInfo->bCurrentAMPDUEnable);
343 ReasonCode = DELBA_REASON_UNKNOWN_BA;
344 goto OnADDBARsp_Reject;
345 }
346
347
348 if (!GetTs(ieee, (struct ts_common_info **)(&pTS), dst,
349 (u8)(pBaParamSet->field.tid), TX_DIR, false)) {
350 netdev_warn(ieee->dev, "%s(): can't get TS\n", __func__);
351 ReasonCode = DELBA_REASON_UNKNOWN_BA;
352 goto OnADDBARsp_Reject;
353 }
354
355 pTS->bAddBaReqInProgress = false;
356 pPendingBA = &pTS->TxPendingBARecord;
357 pAdmittedBA = &pTS->TxAdmittedBARecord;
358
359
360 if (pAdmittedBA->b_valid) {
361 netdev_dbg(ieee->dev, "%s(): ADDBA response already admitted\n",
362 __func__);
363 return -1;
364 } else if (!pPendingBA->b_valid ||
365 (*pDialogToken != pPendingBA->dialog_token)) {
366 netdev_warn(ieee->dev,
367 "%s(): ADDBA Rsp. BA invalid, DELBA!\n",
368 __func__);
369 ReasonCode = DELBA_REASON_UNKNOWN_BA;
370 goto OnADDBARsp_Reject;
371 } else {
372 netdev_dbg(ieee->dev,
373 "%s(): Recv ADDBA Rsp. BA is admitted! Status code:%X\n",
374 __func__, *pStatusCode);
375 DeActivateBAEntry(ieee, pPendingBA);
376 }
377
378
379 if (*pStatusCode == ADDBA_STATUS_SUCCESS) {
380 if (pBaParamSet->field.ba_policy == BA_POLICY_DELAYED) {
381 pTS->bAddBaReqDelayed = true;
382 DeActivateBAEntry(ieee, pAdmittedBA);
383 ReasonCode = DELBA_REASON_END_BA;
384 goto OnADDBARsp_Reject;
385 }
386
387
388 pAdmittedBA->dialog_token = *pDialogToken;
389 pAdmittedBA->ba_timeout_value = *pBaTimeoutVal;
390 pAdmittedBA->ba_start_seq_ctrl = pPendingBA->ba_start_seq_ctrl;
391 pAdmittedBA->ba_param_set = *pBaParamSet;
392 DeActivateBAEntry(ieee, pAdmittedBA);
393 ActivateBAEntry(ieee, pAdmittedBA, *pBaTimeoutVal);
394 } else {
395 pTS->bAddBaReqDelayed = true;
396 pTS->bDisable_AddBa = true;
397 ReasonCode = DELBA_REASON_END_BA;
398 goto OnADDBARsp_Reject;
399 }
400
401 return 0;
402
403OnADDBARsp_Reject:
404 {
405 struct ba_record BA;
406
407 BA.ba_param_set = *pBaParamSet;
408 rtllib_send_DELBA(ieee, dst, &BA, TX_DIR, ReasonCode);
409 return 0;
410 }
411}
412
413int rtllib_rx_DELBA(struct rtllib_device *ieee, struct sk_buff *skb)
414{
415 struct rtllib_hdr_3addr *delba = NULL;
416 union delba_param_set *pDelBaParamSet = NULL;
417 u8 *dst = NULL;
418
419 if (skb->len < sizeof(struct rtllib_hdr_3addr) + 6) {
420 netdev_warn(ieee->dev, "Invalid skb len in DELBA(%d / %d)\n",
421 (int)skb->len,
422 (int)(sizeof(struct rtllib_hdr_3addr) + 6));
423 return -1;
424 }
425
426 if (!ieee->current_network.qos_data.active ||
427 !ieee->pHTInfo->bCurrentHTSupport) {
428 netdev_warn(ieee->dev,
429 "received DELBA while QOS or HT is not supported(%d, %d)\n",
430 ieee->current_network. qos_data.active,
431 ieee->pHTInfo->bCurrentHTSupport);
432 return -1;
433 }
434
435#ifdef VERBOSE_DEBUG
436 print_hex_dump_bytes("%s: ", DUMP_PREFIX_NONE, skb->data,
437 __func__, skb->len);
438#endif
439 delba = (struct rtllib_hdr_3addr *)skb->data;
440 dst = (u8 *)(&delba->addr2[0]);
441 pDelBaParamSet = (union delba_param_set *)&delba->payload[2];
442
443 if (pDelBaParamSet->field.initiator == 1) {
444 struct rx_ts_record *pRxTs;
445
446 if (!GetTs(ieee, (struct ts_common_info **)&pRxTs, dst,
447 (u8)pDelBaParamSet->field.tid, RX_DIR, false)) {
448 netdev_warn(ieee->dev,
449 "%s(): can't get TS for RXTS. dst:%pM TID:%d\n",
450 __func__, dst,
451 (u8)pDelBaParamSet->field.tid);
452 return -1;
453 }
454
455 RxTsDeleteBA(ieee, pRxTs);
456 } else {
457 struct tx_ts_record *pTxTs;
458
459 if (!GetTs(ieee, (struct ts_common_info **)&pTxTs, dst,
460 (u8)pDelBaParamSet->field.tid, TX_DIR, false)) {
461 netdev_warn(ieee->dev, "%s(): can't get TS for TXTS\n",
462 __func__);
463 return -1;
464 }
465
466 pTxTs->bUsingBa = false;
467 pTxTs->bAddBaReqInProgress = false;
468 pTxTs->bAddBaReqDelayed = false;
469 del_timer_sync(&pTxTs->TsAddBaTimer);
470 TxTsDeleteBA(ieee, pTxTs);
471 }
472 return 0;
473}
474
475void TsInitAddBA(struct rtllib_device *ieee, struct tx_ts_record *pTS,
476 u8 Policy, u8 bOverwritePending)
477{
478 struct ba_record *pBA = &pTS->TxPendingBARecord;
479
480 if (pBA->b_valid && !bOverwritePending)
481 return;
482
483 DeActivateBAEntry(ieee, pBA);
484
485 pBA->dialog_token++;
486 pBA->ba_param_set.field.amsdu_support = 0;
487 pBA->ba_param_set.field.ba_policy = Policy;
488 pBA->ba_param_set.field.tid = pTS->TsCommonInfo.TSpec.f.TSInfo.field.ucTSID;
489 pBA->ba_param_set.field.buffer_size = 32;
490 pBA->ba_timeout_value = 0;
491 pBA->ba_start_seq_ctrl.field.seq_num = (pTS->TxCurSeq + 3) % 4096;
492
493 ActivateBAEntry(ieee, pBA, BA_SETUP_TIMEOUT);
494
495 rtllib_send_ADDBAReq(ieee, pTS->TsCommonInfo.Addr, pBA);
496}
497
498void TsInitDelBA(struct rtllib_device *ieee,
499 struct ts_common_info *pTsCommonInfo,
500 enum tr_select TxRxSelect)
501{
502 if (TxRxSelect == TX_DIR) {
503 struct tx_ts_record *pTxTs =
504 (struct tx_ts_record *)pTsCommonInfo;
505
506 if (TxTsDeleteBA(ieee, pTxTs))
507 rtllib_send_DELBA(ieee, pTsCommonInfo->Addr,
508 (pTxTs->TxAdmittedBARecord.b_valid) ?
509 (&pTxTs->TxAdmittedBARecord) :
510 (&pTxTs->TxPendingBARecord),
511 TxRxSelect, DELBA_REASON_END_BA);
512 } else if (TxRxSelect == RX_DIR) {
513 struct rx_ts_record *pRxTs =
514 (struct rx_ts_record *)pTsCommonInfo;
515 if (RxTsDeleteBA(ieee, pRxTs))
516 rtllib_send_DELBA(ieee, pTsCommonInfo->Addr,
517 &pRxTs->rx_admitted_ba_record,
518 TxRxSelect, DELBA_REASON_END_BA);
519 }
520}
521
522void BaSetupTimeOut(struct timer_list *t)
523{
524 struct tx_ts_record *pTxTs = from_timer(pTxTs, t,
525 TxPendingBARecord.timer);
526
527 pTxTs->bAddBaReqInProgress = false;
528 pTxTs->bAddBaReqDelayed = true;
529 pTxTs->TxPendingBARecord.b_valid = false;
530}
531
532void TxBaInactTimeout(struct timer_list *t)
533{
534 struct tx_ts_record *pTxTs = from_timer(pTxTs, t,
535 TxAdmittedBARecord.timer);
536 struct rtllib_device *ieee = container_of(pTxTs, struct rtllib_device,
537 TxTsRecord[pTxTs->num]);
538 TxTsDeleteBA(ieee, pTxTs);
539 rtllib_send_DELBA(ieee, pTxTs->TsCommonInfo.Addr,
540 &pTxTs->TxAdmittedBARecord, TX_DIR,
541 DELBA_REASON_TIMEOUT);
542}
543
544void RxBaInactTimeout(struct timer_list *t)
545{
546 struct rx_ts_record *pRxTs = from_timer(pRxTs, t,
547 rx_admitted_ba_record.timer);
548 struct rtllib_device *ieee = container_of(pRxTs, struct rtllib_device,
549 RxTsRecord[pRxTs->num]);
550
551 RxTsDeleteBA(ieee, pRxTs);
552 rtllib_send_DELBA(ieee, pRxTs->ts_common_info.Addr,
553 &pRxTs->rx_admitted_ba_record, RX_DIR,
554 DELBA_REASON_TIMEOUT);
555}
556
