1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright(c) 2008 - 2010 Realtek Corporation. All rights reserved. 4 * 5 * Contact Information: wlanfae <wlanfae@realtek.com> 6 */ 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 activate_ba_entry(struct ba_record *ba, u16 time) 14{ 15 ba->b_valid = true; 16 if (time != 0) 17 mod_timer(&ba->timer, jiffies + msecs_to_jiffies(time)); 18} 19 20static void deactivate_ba_entry(struct rtllib_device *ieee, struct ba_record *ba) 21{ 22 ba->b_valid = false; 23 del_timer_sync(&ba->timer); 24} 25 26static u8 tx_ts_delete_ba(struct rtllib_device *ieee, struct tx_ts_record *ts) 27{ 28 struct ba_record *admitted_ba = &ts->tx_admitted_ba_record; 29 struct ba_record *pending_ba = &ts->tx_pending_ba_record; 30 u8 send_del_ba = false; 31 32 if (pending_ba->b_valid) { 33 deactivate_ba_entry(ieee, pending_ba); 34 send_del_ba = true; 35 } 36 37 if (admitted_ba->b_valid) { 38 deactivate_ba_entry(ieee, admitted_ba); 39 send_del_ba = true; 40 } 41 return send_del_ba; 42} 43 44static u8 rx_ts_delete_ba(struct rtllib_device *ieee, struct rx_ts_record *ts) 45{ 46 struct ba_record *ba = &ts->rx_admitted_ba_record; 47 u8 send_del_ba = false; 48 49 if (ba->b_valid) { 50 deactivate_ba_entry(ieee, ba); 51 send_del_ba = true; 52 } 53 54 return send_del_ba; 55} 56 57void rtllib_reset_ba_entry(struct ba_record *ba) 58{ 59 ba->b_valid = false; 60 ba->ba_param_set.short_data = 0; 61 ba->ba_timeout_value = 0; 62 ba->dialog_token = 0; 63 ba->ba_start_seq_ctrl.short_data = 0; 64} 65 66static struct sk_buff *rtllib_ADDBA(struct rtllib_device *ieee, u8 *dst, 67 struct ba_record *ba, 68 u16 status_code, u8 type) 69{ 70 struct sk_buff *skb = NULL; 71 struct ieee80211_hdr_3addr *ba_req = 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 (!ba) { 79 netdev_warn(ieee->dev, "ba is NULL\n"); 80 return NULL; 81 } 82 skb = dev_alloc_skb(len + sizeof(struct ieee80211_hdr_3addr)); 83 if (!skb) 84 return NULL; 85 86 memset(skb->data, 0, sizeof(struct ieee80211_hdr_3addr)); 87 88 skb_reserve(skb, ieee->tx_headroom); 89 90 ba_req = skb_put(skb, sizeof(struct ieee80211_hdr_3addr)); 91 92 ether_addr_copy(ba_req->addr1, dst); 93 ether_addr_copy(ba_req->addr2, ieee->dev->dev_addr); 94 95 ether_addr_copy(ba_req->addr3, ieee->current_network.bssid); 96 ba_req->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION); 97 98 tag = skb_put(skb, 9); 99 *tag++ = ACT_CAT_BA; 100 *tag++ = type; 101 *tag++ = ba->dialog_token; 102 103 if (type == ACT_ADDBARSP) { 104 put_unaligned_le16(status_code, tag); 105 tag += 2; 106 } 107 108 put_unaligned_le16(ba->ba_param_set.short_data, tag); 109 tag += 2; 110 111 put_unaligned_le16(ba->ba_timeout_value, tag); 112 tag += 2; 113 114 if (type == ACT_ADDBAREQ) { 115 memcpy(tag, (u8 *)&ba->ba_start_seq_ctrl, 2); 116 tag += 2; 117 } 118 119#ifdef VERBOSE_DEBUG 120 print_hex_dump_bytes("%s: ", DUMP_PREFIX_NONE, skb->data, 121 __func__, skb->len); 122#endif 123 return skb; 124} 125 126static struct sk_buff *rtllib_DELBA(struct rtllib_device *ieee, u8 *dst, 127 struct ba_record *ba, 128 enum tr_select tx_rx_select, u16 reason_code) 129{ 130 union delba_param_set del_ba_param_set; 131 struct sk_buff *skb = NULL; 132 struct ieee80211_hdr_3addr *del_ba = NULL; 133 u8 *tag = NULL; 134 u16 len = 6 + ieee->tx_headroom; 135 136 if (net_ratelimit()) 137 netdev_dbg(ieee->dev, "%s(): reason_code(%d) sentd to: %pM\n", 138 __func__, reason_code, dst); 139 140 memset(&del_ba_param_set, 0, 2); 141 142 del_ba_param_set.field.initiator = (tx_rx_select == TX_DIR) ? 1 : 0; 143 del_ba_param_set.field.tid = ba->ba_param_set.field.tid; 144 145 skb = dev_alloc_skb(len + sizeof(struct ieee80211_hdr_3addr)); 146 if (!skb) 147 return NULL; 148 149 skb_reserve(skb, ieee->tx_headroom); 150 151 del_ba = skb_put(skb, sizeof(struct ieee80211_hdr_3addr)); 152 153 ether_addr_copy(del_ba->addr1, dst); 154 ether_addr_copy(del_ba->addr2, ieee->dev->dev_addr); 155 ether_addr_copy(del_ba->addr3, ieee->current_network.bssid); 156 del_ba->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION); 157 158 tag = skb_put(skb, 6); 159 160 *tag++ = ACT_CAT_BA; 161 *tag++ = ACT_DELBA; 162 163 put_unaligned_le16(del_ba_param_set.short_data, tag); 164 tag += 2; 165 166 put_unaligned_le16(reason_code, tag); 167 tag += 2; 168 169#ifdef VERBOSE_DEBUG 170 print_hex_dump_bytes("%s: ", DUMP_PREFIX_NONE, skb->data, 171 __func__, skb->len); 172#endif 173 return skb; 174} 175 176static void rtllib_send_add_ba_req(struct rtllib_device *ieee, u8 *dst, 177 struct ba_record *ba) 178{ 179 struct sk_buff *skb; 180 181 skb = rtllib_ADDBA(ieee, dst, ba, 0, ACT_ADDBAREQ); 182 183 if (skb) 184 softmac_mgmt_xmit(skb, ieee); 185 else 186 netdev_dbg(ieee->dev, "Failed to generate ADDBAReq packet.\n"); 187} 188 189static void rtllib_send_add_ba_rsp(struct rtllib_device *ieee, u8 *dst, 190 struct ba_record *ba, u16 status_code) 191{ 192 struct sk_buff *skb; 193 194 skb = rtllib_ADDBA(ieee, dst, ba, status_code, ACT_ADDBARSP); 195 if (skb) 196 softmac_mgmt_xmit(skb, ieee); 197 else 198 netdev_dbg(ieee->dev, "Failed to generate ADDBARsp packet.\n"); 199} 200 201static void rtllib_send_DELBA(struct rtllib_device *ieee, u8 *dst, 202 struct ba_record *ba, enum tr_select tx_rx_select, 203 u16 reason_code) 204{ 205 struct sk_buff *skb; 206 207 skb = rtllib_DELBA(ieee, dst, ba, tx_rx_select, reason_code); 208 if (skb) 209 softmac_mgmt_xmit(skb, ieee); 210 else 211 netdev_dbg(ieee->dev, "Failed to generate DELBA packet.\n"); 212} 213 214int rtllib_rx_add_ba_req(struct rtllib_device *ieee, struct sk_buff *skb) 215{ 216 struct ieee80211_hdr_3addr *req = NULL; 217 u16 rc = 0; 218 u8 *dst = NULL, *dialog_token = NULL, *tag = NULL; 219 struct ba_record *ba = NULL; 220 union ba_param_set *ba_param_set = NULL; 221 u16 *ba_timeout_value = NULL; 222 union sequence_control *ba_start_seq_ctrl = NULL; 223 struct rx_ts_record *ts = NULL; 224 225 if (skb->len < sizeof(struct ieee80211_hdr_3addr) + 9) { 226 netdev_warn(ieee->dev, "Invalid skb len in BAREQ(%d / %d)\n", 227 (int)skb->len, 228 (int)(sizeof(struct ieee80211_hdr_3addr) + 9)); 229 return -1; 230 } 231 232#ifdef VERBOSE_DEBUG 233 print_hex_dump_bytes("%s: ", DUMP_PREFIX_NONE, __func__, 234 skb->data, skb->len); 235#endif 236 237 req = (struct ieee80211_hdr_3addr *)skb->data; 238 tag = (u8 *)req; 239 dst = (u8 *)(&req->addr2[0]); 240 tag += sizeof(struct ieee80211_hdr_3addr); 241 dialog_token = tag + 2; 242 ba_param_set = (union ba_param_set *)(tag + 3); 243 ba_timeout_value = (u16 *)(tag + 5); 244 ba_start_seq_ctrl = (union sequence_control *)(req + 7); 245 246 if (!ieee->current_network.qos_data.active || 247 !ieee->ht_info->current_ht_support || 248 (ieee->ht_info->iot_action & HT_IOT_ACT_REJECT_ADDBA_REQ)) { 249 rc = ADDBA_STATUS_REFUSED; 250 netdev_warn(ieee->dev, 251 "Failed to reply on ADDBA_REQ as some capability is not ready(%d, %d)\n", 252 ieee->current_network.qos_data.active, 253 ieee->ht_info->current_ht_support); 254 goto on_add_ba_req_fail; 255 } 256 if (!rtllib_get_ts(ieee, (struct ts_common_info **)&ts, dst, 257 (u8)(ba_param_set->field.tid), RX_DIR, true)) { 258 rc = ADDBA_STATUS_REFUSED; 259 netdev_warn(ieee->dev, "%s(): can't get TS\n", __func__); 260 goto on_add_ba_req_fail; 261 } 262 ba = &ts->rx_admitted_ba_record; 263 264 if (ba_param_set->field.ba_policy == BA_POLICY_DELAYED) { 265 rc = ADDBA_STATUS_INVALID_PARAM; 266 netdev_warn(ieee->dev, "%s(): BA Policy is not correct\n", 267 __func__); 268 goto on_add_ba_req_fail; 269 } 270 271 rtllib_flush_rx_ts_pending_pkts(ieee, ts); 272 273 deactivate_ba_entry(ieee, ba); 274 ba->dialog_token = *dialog_token; 275 ba->ba_param_set = *ba_param_set; 276 ba->ba_timeout_value = *ba_timeout_value; 277 ba->ba_start_seq_ctrl = *ba_start_seq_ctrl; 278 279 if (ieee->get_half_nmode_support_by_aps_handler(ieee->dev) || 280 (ieee->ht_info->iot_action & HT_IOT_ACT_ALLOW_PEER_AGG_ONE_PKT)) 281 ba->ba_param_set.field.buffer_size = 1; 282 else 283 ba->ba_param_set.field.buffer_size = 32; 284 285 activate_ba_entry(ba, 0); 286 rtllib_send_add_ba_rsp(ieee, dst, ba, ADDBA_STATUS_SUCCESS); 287 288 return 0; 289 290on_add_ba_req_fail: 291 { 292 struct ba_record BA; 293 294 BA.ba_param_set = *ba_param_set; 295 BA.ba_timeout_value = *ba_timeout_value; 296 BA.dialog_token = *dialog_token; 297 BA.ba_param_set.field.ba_policy = BA_POLICY_IMMEDIATE; 298 rtllib_send_add_ba_rsp(ieee, dst, &BA, rc); 299 return 0; 300 } 301} 302 303int rtllib_rx_add_ba_rsp(struct rtllib_device *ieee, struct sk_buff *skb) 304{ 305 struct ieee80211_hdr_3addr *rsp = NULL; 306 struct ba_record *pending_ba, *admitted_ba; 307 struct tx_ts_record *ts = NULL; 308 u8 *dst = NULL, *dialog_token = NULL, *tag = NULL; 309 u16 *status_code = NULL, *ba_timeout_value = NULL; 310 union ba_param_set *ba_param_set = NULL; 311 u16 reason_code; 312 313 if (skb->len < sizeof(struct ieee80211_hdr_3addr) + 9) { 314 netdev_warn(ieee->dev, "Invalid skb len in BARSP(%d / %d)\n", 315 (int)skb->len, 316 (int)(sizeof(struct ieee80211_hdr_3addr) + 9)); 317 return -1; 318 } 319 rsp = (struct ieee80211_hdr_3addr *)skb->data; 320 tag = (u8 *)rsp; 321 dst = (u8 *)(&rsp->addr2[0]); 322 tag += sizeof(struct ieee80211_hdr_3addr); 323 dialog_token = tag + 2; 324 status_code = (u16 *)(tag + 3); 325 ba_param_set = (union ba_param_set *)(tag + 5); 326 ba_timeout_value = (u16 *)(tag + 7); 327 328 if (!ieee->current_network.qos_data.active || 329 !ieee->ht_info->current_ht_support || 330 !ieee->ht_info->current_ampdu_enable) { 331 netdev_warn(ieee->dev, 332 "reject to ADDBA_RSP as some capability is not ready(%d, %d, %d)\n", 333 ieee->current_network.qos_data.active, 334 ieee->ht_info->current_ht_support, 335 ieee->ht_info->current_ampdu_enable); 336 reason_code = DELBA_REASON_UNKNOWN_BA; 337 goto on_add_ba_rsp_reject; 338 } 339 340 if (!rtllib_get_ts(ieee, (struct ts_common_info **)&ts, dst, 341 (u8)(ba_param_set->field.tid), TX_DIR, false)) { 342 netdev_warn(ieee->dev, "%s(): can't get TS\n", __func__); 343 reason_code = DELBA_REASON_UNKNOWN_BA; 344 goto on_add_ba_rsp_reject; 345 } 346 347 ts->add_ba_req_in_progress = false; 348 pending_ba = &ts->tx_pending_ba_record; 349 admitted_ba = &ts->tx_admitted_ba_record; 350 351 if (admitted_ba->b_valid) { 352 netdev_dbg(ieee->dev, "%s(): ADDBA response already admitted\n", 353 __func__); 354 return -1; 355 } else if (!pending_ba->b_valid || 356 (*dialog_token != pending_ba->dialog_token)) { 357 netdev_warn(ieee->dev, 358 "%s(): ADDBA Rsp. BA invalid, DELBA!\n", 359 __func__); 360 reason_code = DELBA_REASON_UNKNOWN_BA; 361 goto on_add_ba_rsp_reject; 362 } else { 363 netdev_dbg(ieee->dev, 364 "%s(): Recv ADDBA Rsp. BA is admitted! Status code:%X\n", 365 __func__, *status_code); 366 deactivate_ba_entry(ieee, pending_ba); 367 } 368 369 if (*status_code == ADDBA_STATUS_SUCCESS) { 370 if (ba_param_set->field.ba_policy == BA_POLICY_DELAYED) { 371 ts->add_ba_req_delayed = true; 372 deactivate_ba_entry(ieee, admitted_ba); 373 reason_code = DELBA_REASON_END_BA; 374 goto on_add_ba_rsp_reject; 375 } 376 377 admitted_ba->dialog_token = *dialog_token; 378 admitted_ba->ba_timeout_value = *ba_timeout_value; 379 admitted_ba->ba_start_seq_ctrl = pending_ba->ba_start_seq_ctrl; 380 admitted_ba->ba_param_set = *ba_param_set; 381 deactivate_ba_entry(ieee, admitted_ba); 382 activate_ba_entry(admitted_ba, *ba_timeout_value); 383 } else { 384 ts->add_ba_req_delayed = true; 385 ts->disable_add_ba = true; 386 reason_code = DELBA_REASON_END_BA; 387 goto on_add_ba_rsp_reject; 388 } 389 390 return 0; 391 392on_add_ba_rsp_reject: 393 { 394 struct ba_record BA; 395 396 BA.ba_param_set = *ba_param_set; 397 rtllib_send_DELBA(ieee, dst, &BA, TX_DIR, reason_code); 398 return 0; 399 } 400} 401 402int rtllib_rx_DELBA(struct rtllib_device *ieee, struct sk_buff *skb) 403{ 404 struct ieee80211_hdr_3addr *delba = NULL; 405 union delba_param_set *del_ba_param_set = NULL; 406 u8 *dst = NULL; 407 408 if (skb->len < sizeof(struct ieee80211_hdr_3addr) + 6) { 409 netdev_warn(ieee->dev, "Invalid skb len in DELBA(%d / %d)\n", 410 (int)skb->len, 411 (int)(sizeof(struct ieee80211_hdr_3addr) + 6)); 412 return -1; 413 } 414 415 if (!ieee->current_network.qos_data.active || 416 !ieee->ht_info->current_ht_support) { 417 netdev_warn(ieee->dev, 418 "received DELBA while QOS or HT is not supported(%d, %d)\n", 419 ieee->current_network. qos_data.active, 420 ieee->ht_info->current_ht_support); 421 return -1; 422 } 423 424#ifdef VERBOSE_DEBUG 425 print_hex_dump_bytes("%s: ", DUMP_PREFIX_NONE, skb->data, 426 __func__, skb->len); 427#endif 428 delba = (struct ieee80211_hdr_3addr *)skb->data; 429 dst = (u8 *)(&delba->addr2[0]); 430 del_ba_param_set = (union delba_param_set *)&delba->seq_ctrl + 2; 431 432 if (del_ba_param_set->field.initiator == 1) { 433 struct rx_ts_record *ts; 434 435 if (!rtllib_get_ts(ieee, (struct ts_common_info **)&ts, dst, 436 (u8)del_ba_param_set->field.tid, RX_DIR, false)) { 437 netdev_warn(ieee->dev, 438 "%s(): can't get TS for RXTS. dst:%pM TID:%d\n", 439 __func__, dst, 440 (u8)del_ba_param_set->field.tid); 441 return -1; 442 } 443 444 rx_ts_delete_ba(ieee, ts); 445 } else { 446 struct tx_ts_record *ts; 447 448 if (!rtllib_get_ts(ieee, (struct ts_common_info **)&ts, dst, 449 (u8)del_ba_param_set->field.tid, TX_DIR, false)) { 450 netdev_warn(ieee->dev, "%s(): can't get TS for TXTS\n", 451 __func__); 452 return -1; 453 } 454 455 ts->using_ba = false; 456 ts->add_ba_req_in_progress = false; 457 ts->add_ba_req_delayed = false; 458 del_timer_sync(&ts->ts_add_ba_timer); 459 tx_ts_delete_ba(ieee, ts); 460 } 461 return 0; 462} 463 464void rtllib_ts_init_add_ba(struct rtllib_device *ieee, struct tx_ts_record *ts, 465 u8 policy, u8 overwrite_pending) 466{ 467 struct ba_record *ba = &ts->tx_pending_ba_record; 468 469 if (ba->b_valid && !overwrite_pending) 470 return; 471 472 deactivate_ba_entry(ieee, ba); 473 474 ba->dialog_token++; 475 ba->ba_param_set.field.amsdu_support = 0; 476 ba->ba_param_set.field.ba_policy = policy; 477 ba->ba_param_set.field.tid = ts->ts_common_info.tspec.ts_id; 478 ba->ba_param_set.field.buffer_size = 32; 479 ba->ba_timeout_value = 0; 480 ba->ba_start_seq_ctrl.field.seq_num = (ts->tx_cur_seq + 3) % 4096; 481 482 activate_ba_entry(ba, BA_SETUP_TIMEOUT); 483 484 rtllib_send_add_ba_req(ieee, ts->ts_common_info.addr, ba); 485} 486 487void rtllib_ts_init_del_ba(struct rtllib_device *ieee, 488 struct ts_common_info *ts_common_info, 489 enum tr_select tx_rx_select) 490{ 491 if (tx_rx_select == TX_DIR) { 492 struct tx_ts_record *ts = 493 (struct tx_ts_record *)ts_common_info; 494 495 if (tx_ts_delete_ba(ieee, ts)) 496 rtllib_send_DELBA(ieee, ts_common_info->addr, 497 (ts->tx_admitted_ba_record.b_valid) ? 498 (&ts->tx_admitted_ba_record) : 499 (&ts->tx_pending_ba_record), 500 tx_rx_select, DELBA_REASON_END_BA); 501 } else if (tx_rx_select == RX_DIR) { 502 struct rx_ts_record *ts = 503 (struct rx_ts_record *)ts_common_info; 504 if (rx_ts_delete_ba(ieee, ts)) 505 rtllib_send_DELBA(ieee, ts_common_info->addr, 506 &ts->rx_admitted_ba_record, 507 tx_rx_select, DELBA_REASON_END_BA); 508 } 509} 510 511void rtllib_ba_setup_timeout(struct timer_list *t) 512{ 513 struct tx_ts_record *ts = from_timer(ts, t, 514 tx_pending_ba_record.timer); 515 516 ts->add_ba_req_in_progress = false; 517 ts->add_ba_req_delayed = true; 518 ts->tx_pending_ba_record.b_valid = false; 519} 520 521void rtllib_tx_ba_inact_timeout(struct timer_list *t) 522{ 523 struct tx_ts_record *ts = from_timer(ts, t, 524 tx_admitted_ba_record.timer); 525 struct rtllib_device *ieee = container_of(ts, struct rtllib_device, 526 tx_ts_records[ts->num]); 527 tx_ts_delete_ba(ieee, ts); 528 rtllib_send_DELBA(ieee, ts->ts_common_info.addr, 529 &ts->tx_admitted_ba_record, TX_DIR, 530 DELBA_REASON_TIMEOUT); 531} 532 533void rtllib_rx_ba_inact_timeout(struct timer_list *t) 534{ 535 struct rx_ts_record *ts = from_timer(ts, t, 536 rx_admitted_ba_record.timer); 537 struct rtllib_device *ieee = container_of(ts, struct rtllib_device, 538 rx_ts_records[ts->num]); 539 540 rx_ts_delete_ba(ieee, ts); 541 rtllib_send_DELBA(ieee, ts->ts_common_info.addr, 542 &ts->rx_admitted_ba_record, RX_DIR, 543 DELBA_REASON_TIMEOUT); 544} 545