1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright(c) 2003 - 2004 Intel Corporation. All rights reserved. 4 * 5 * Contact Information: 6 * James P. Ketrenos <ipw2100-admin@linux.intel.com> 7 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 8 * 9 * Few modifications for Realtek's Wi-Fi drivers by 10 * Andrea Merello <andrea.merello@gmail.com> 11 * 12 * A special thanks goes to Realtek for their support ! 13 */ 14 #include <linux/compiler.h> 15 #include <linux/errno.h> 16 #include <linux/if_arp.h> 17 #include <linux/in6.h> 18 #include <linux/in.h> 19 #include <linux/ip.h> 20 #include <linux/kernel.h> 21 #include <linux/module.h> 22 #include <linux/netdevice.h> 23 #include <linux/pci.h> 24 #include <linux/proc_fs.h> 25 #include <linux/skbuff.h> 26 #include <linux/slab.h> 27 #include <linux/tcp.h> 28 #include <linux/types.h> 29 #include <linux/wireless.h> 30 #include <linux/etherdevice.h> 31 #include <linux/uaccess.h> 32 #include <linux/if_vlan.h> 33 34 #include "rtllib.h" 35 36 /* 802.11 Data Frame 37 * 38 * 39 * 802.11 frame_control for data frames - 2 bytes 40 * ,--------------------------------------------------------------------. 41 * bits | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | a | b | c | d | e | 42 * |---|---|---|---|---|---|---|---|---|----|----|-----|-----|-----|----| 43 * val | 0 | 0 | 0 | 1 | x | 0 | 0 | 0 | 1 | 0 | x | x | x | x | x | 44 * |---|---|---|---|---|---|---|---|---|----|----|-----|-----|-----|----| 45 * desc | ver | type | ^-subtype-^ |to |from|more|retry| pwr |more |wep | 46 * | | | x=0 data |DS | DS |frag| | mgm |data | | 47 * | | | x=1 data+ack | | | | | | | | 48 * '--------------------------------------------------------------------' 49 * /\ 50 * | 51 * 802.11 Data Frame | 52 * ,--------- 'ctrl' expands to >---' 53 * | 54 * ,--'---,-------------------------------------------------------------. 55 * Bytes | 2 | 2 | 6 | 6 | 6 | 2 | 0..2312 | 4 | 56 * |------|------|---------|---------|---------|------|---------|------| 57 * Desc. | ctrl | dura | DA/RA | TA | SA | Sequ | Frame | fcs | 58 * | | tion | (BSSID) | | | ence | data | | 59 * `--------------------------------------------------| |------' 60 * Total: 28 non-data bytes `----.----' 61 * | 62 * .- 'Frame data' expands to <---------------------------' 63 * | 64 * V 65 * ,---------------------------------------------------. 66 * Bytes | 1 | 1 | 1 | 3 | 2 | 0-2304 | 67 * |------|------|---------|----------|------|---------| 68 * Desc. | SNAP | SNAP | Control |Eth Tunnel| Type | IP | 69 * | DSAP | SSAP | | | | Packet | 70 * | 0xAA | 0xAA |0x03 (UI)|0x00-00-F8| | | 71 * `-----------------------------------------| | 72 * Total: 8 non-data bytes `----.----' 73 * | 74 * .- 'IP Packet' expands, if WEP enabled, to <--' 75 * | 76 * V 77 * ,-----------------------. 78 * Bytes | 4 | 0-2296 | 4 | 79 * |-----|-----------|-----| 80 * Desc. | IV | Encrypted | ICV | 81 * | | IP Packet | | 82 * `-----------------------' 83 * Total: 8 non-data bytes 84 * 85 * 86 * 802.3 Ethernet Data Frame 87 * 88 * ,-----------------------------------------. 89 * Bytes | 6 | 6 | 2 | Variable | 4 | 90 * |-------|-------|------|-----------|------| 91 * Desc. | Dest. | Source| Type | IP Packet | fcs | 92 * | MAC | MAC | | | | 93 * `-----------------------------------------' 94 * Total: 18 non-data bytes 95 * 96 * In the event that fragmentation is required, the incoming payload is split 97 * into N parts of size ieee->fts. The first fragment contains the SNAP header 98 * and the remaining packets are just data. 99 * 100 * If encryption is enabled, each fragment payload size is reduced by enough 101 * space to add the prefix and postfix (IV and ICV totalling 8 bytes in 102 * the case of WEP) So if you have 1500 bytes of payload with ieee->fts set to 103 * 500 without encryption it will take 3 frames. With WEP it will take 4 frames 104 * as the payload of each frame is reduced to 492 bytes. 105 * 106 * SKB visualization 107 * 108 * ,- skb->data 109 * | 110 * | ETHERNET HEADER ,-<-- PAYLOAD 111 * | | 14 bytes from skb->data 112 * | 2 bytes for Type --> ,T. | (sizeof ethhdr) 113 * | | | | 114 * |,-Dest.--. ,--Src.---. | | | 115 * | 6 bytes| | 6 bytes | | | | 116 * v | | | | | | 117 * 0 | v 1 | v | v 2 118 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 119 * ^ | ^ | ^ | 120 * | | | | | | 121 * | | | | `T' <---- 2 bytes for Type 122 * | | | | 123 * | | '---SNAP--' <-------- 6 bytes for SNAP 124 * | | 125 * `-IV--' <-------------------- 4 bytes for IV (WEP) 126 * 127 * SNAP HEADER 128 * 129 */ 130 131 static u8 P802_1H_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0xf8 }; 132 static u8 RFC1042_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0x00 }; 133 134 static int rtllib_put_snap(u8 *data, u16 h_proto) 135 { 136 struct rtllib_snap_hdr *snap; 137 u8 *oui; 138 139 snap = (struct rtllib_snap_hdr *)data; 140 snap->dsap = 0xaa; 141 snap->ssap = 0xaa; 142 snap->ctrl = 0x03; 143 144 if (h_proto == 0x8137 || h_proto == 0x80f3) 145 oui = P802_1H_OUI; 146 else 147 oui = RFC1042_OUI; 148 snap->oui[0] = oui[0]; 149 snap->oui[1] = oui[1]; 150 snap->oui[2] = oui[2]; 151 152 *(__be16 *)(data + SNAP_SIZE) = htons(h_proto); 153 154 return SNAP_SIZE + sizeof(u16); 155 } 156 157 int rtllib_encrypt_fragment(struct rtllib_device *ieee, struct sk_buff *frag, 158 int hdr_len) 159 { 160 struct lib80211_crypt_data *crypt = NULL; 161 int res; 162 163 crypt = ieee->crypt_info.crypt[ieee->crypt_info.tx_keyidx]; 164 165 if (!(crypt && crypt->ops)) { 166 netdev_info(ieee->dev, "=========>%s(), crypt is null\n", 167 __func__); 168 return -1; 169 } 170 /* To encrypt, frame format is: 171 * IV (4 bytes), clear payload (including SNAP), ICV (4 bytes) 172 */ 173 174 /* Host-based IEEE 802.11 fragmentation for TX is not yet supported, so 175 * call both MSDU and MPDU encryption functions from here. 176 */ 177 atomic_inc(&crypt->refcnt); 178 res = 0; 179 if (crypt->ops->encrypt_msdu) 180 res = crypt->ops->encrypt_msdu(frag, hdr_len, crypt->priv); 181 if (res == 0 && crypt->ops->encrypt_mpdu) 182 res = crypt->ops->encrypt_mpdu(frag, hdr_len, crypt->priv); 183 184 atomic_dec(&crypt->refcnt); 185 if (res < 0) { 186 netdev_info(ieee->dev, "%s: Encryption failed: len=%d.\n", 187 ieee->dev->name, frag->len); 188 return -1; 189 } 190 191 return 0; 192 } 193 194 195 void rtllib_txb_free(struct rtllib_txb *txb) 196 { 197 if (unlikely(!txb)) 198 return; 199 kfree(txb); 200 } 201 202 static struct rtllib_txb *rtllib_alloc_txb(int nr_frags, int txb_size, 203 gfp_t gfp_mask) 204 { 205 struct rtllib_txb *txb; 206 int i; 207 208 txb = kzalloc(struct_size(txb, fragments, nr_frags), gfp_mask); 209 if (!txb) 210 return NULL; 211 212 txb->nr_frags = nr_frags; 213 txb->frag_size = cpu_to_le16(txb_size); 214 215 for (i = 0; i < nr_frags; i++) { 216 txb->fragments[i] = dev_alloc_skb(txb_size); 217 if (unlikely(!txb->fragments[i])) 218 goto err_free; 219 memset(txb->fragments[i]->cb, 0, sizeof(txb->fragments[i]->cb)); 220 } 221 222 return txb; 223 224 err_free: 225 while (--i >= 0) 226 dev_kfree_skb_any(txb->fragments[i]); 227 kfree(txb); 228 229 return NULL; 230 } 231 232 static int rtllib_classify(struct sk_buff *skb, u8 bIsAmsdu) 233 { 234 struct ethhdr *eth; 235 struct iphdr *ip; 236 237 eth = (struct ethhdr *)skb->data; 238 if (eth->h_proto != htons(ETH_P_IP)) 239 return 0; 240 241 #ifdef VERBOSE_DEBUG 242 print_hex_dump_bytes("%s: ", __func__, DUMP_PREFIX_NONE, skb->data, 243 skb->len); 244 #endif 245 ip = ip_hdr(skb); 246 switch (ip->tos & 0xfc) { 247 case 0x20: 248 return 2; 249 case 0x40: 250 return 1; 251 case 0x60: 252 return 3; 253 case 0x80: 254 return 4; 255 case 0xa0: 256 return 5; 257 case 0xc0: 258 return 6; 259 case 0xe0: 260 return 7; 261 default: 262 return 0; 263 } 264 } 265 266 static void rtllib_tx_query_agg_cap(struct rtllib_device *ieee, 267 struct sk_buff *skb, 268 struct cb_desc *tcb_desc) 269 { 270 struct rt_hi_throughput *pHTInfo = ieee->pHTInfo; 271 struct tx_ts_record *pTxTs = NULL; 272 struct rtllib_hdr_1addr *hdr = (struct rtllib_hdr_1addr *)skb->data; 273 274 if (rtllib_act_scanning(ieee, false)) 275 return; 276 277 if (!pHTInfo->bCurrentHTSupport || !pHTInfo->bEnableHT) 278 return; 279 if (!IsQoSDataFrame(skb->data)) 280 return; 281 if (is_multicast_ether_addr(hdr->addr1)) 282 return; 283 284 if (tcb_desc->bdhcp || ieee->CntAfterLink < 2) 285 return; 286 287 if (pHTInfo->iot_action & HT_IOT_ACT_TX_NO_AGGREGATION) 288 return; 289 290 if (!ieee->GetNmodeSupportBySecCfg(ieee->dev)) 291 return; 292 if (pHTInfo->bCurrentAMPDUEnable) { 293 if (!GetTs(ieee, (struct ts_common_info **)(&pTxTs), hdr->addr1, 294 skb->priority, TX_DIR, true)) { 295 netdev_info(ieee->dev, "%s: can't get TS\n", __func__); 296 return; 297 } 298 if (!pTxTs->TxAdmittedBARecord.b_valid) { 299 if (ieee->wpa_ie_len && (ieee->pairwise_key_type == 300 KEY_TYPE_NA)) { 301 ; 302 } else if (tcb_desc->bdhcp == 1) { 303 ; 304 } else if (!pTxTs->bDisable_AddBa) { 305 TsStartAddBaProcess(ieee, pTxTs); 306 } 307 goto FORCED_AGG_SETTING; 308 } else if (!pTxTs->bUsingBa) { 309 if (SN_LESS(pTxTs->TxAdmittedBARecord.ba_start_seq_ctrl.field.seq_num, 310 (pTxTs->TxCurSeq+1)%4096)) 311 pTxTs->bUsingBa = true; 312 else 313 goto FORCED_AGG_SETTING; 314 } 315 if (ieee->iw_mode == IW_MODE_INFRA) { 316 tcb_desc->bAMPDUEnable = true; 317 tcb_desc->ampdu_factor = pHTInfo->CurrentAMPDUFactor; 318 tcb_desc->ampdu_density = pHTInfo->current_mpdu_density; 319 } 320 } 321 FORCED_AGG_SETTING: 322 switch (pHTInfo->ForcedAMPDUMode) { 323 case HT_AGG_AUTO: 324 break; 325 326 case HT_AGG_FORCE_ENABLE: 327 tcb_desc->bAMPDUEnable = true; 328 tcb_desc->ampdu_density = pHTInfo->forced_mpdu_density; 329 tcb_desc->ampdu_factor = pHTInfo->forced_ampdu_factor; 330 break; 331 332 case HT_AGG_FORCE_DISABLE: 333 tcb_desc->bAMPDUEnable = false; 334 tcb_desc->ampdu_density = 0; 335 tcb_desc->ampdu_factor = 0; 336 break; 337 } 338 } 339 340 static void rtllib_query_ShortPreambleMode(struct rtllib_device *ieee, 341 struct cb_desc *tcb_desc) 342 { 343 tcb_desc->bUseShortPreamble = false; 344 if (tcb_desc->data_rate == 2) 345 return; 346 else if (ieee->current_network.capability & 347 WLAN_CAPABILITY_SHORT_PREAMBLE) 348 tcb_desc->bUseShortPreamble = true; 349 } 350 351 static void rtllib_query_HTCapShortGI(struct rtllib_device *ieee, 352 struct cb_desc *tcb_desc) 353 { 354 struct rt_hi_throughput *pHTInfo = ieee->pHTInfo; 355 356 tcb_desc->bUseShortGI = false; 357 358 if (!pHTInfo->bCurrentHTSupport || !pHTInfo->bEnableHT) 359 return; 360 361 if (pHTInfo->forced_short_gi) { 362 tcb_desc->bUseShortGI = true; 363 return; 364 } 365 366 if (pHTInfo->bCurBW40MHz && pHTInfo->bCurShortGI40MHz) 367 tcb_desc->bUseShortGI = true; 368 else if (!pHTInfo->bCurBW40MHz && pHTInfo->bCurShortGI20MHz) 369 tcb_desc->bUseShortGI = true; 370 } 371 372 static void rtllib_query_BandwidthMode(struct rtllib_device *ieee, 373 struct cb_desc *tcb_desc) 374 { 375 struct rt_hi_throughput *pHTInfo = ieee->pHTInfo; 376 377 tcb_desc->bPacketBW = false; 378 379 if (!pHTInfo->bCurrentHTSupport || !pHTInfo->bEnableHT) 380 return; 381 382 if (tcb_desc->bMulticast || tcb_desc->bBroadcast) 383 return; 384 385 if ((tcb_desc->data_rate & 0x80) == 0) 386 return; 387 if (pHTInfo->bCurBW40MHz && pHTInfo->cur_tx_bw40mhz && 388 !ieee->bandwidth_auto_switch.bforced_tx20Mhz) 389 tcb_desc->bPacketBW = true; 390 } 391 392 static void rtllib_query_protectionmode(struct rtllib_device *ieee, 393 struct cb_desc *tcb_desc, 394 struct sk_buff *skb) 395 { 396 struct rt_hi_throughput *pHTInfo; 397 398 tcb_desc->bRTSSTBC = false; 399 tcb_desc->bRTSUseShortGI = false; 400 tcb_desc->bCTSEnable = false; 401 tcb_desc->RTSSC = 0; 402 tcb_desc->bRTSBW = false; 403 404 if (tcb_desc->bBroadcast || tcb_desc->bMulticast) 405 return; 406 407 if (is_broadcast_ether_addr(skb->data+16)) 408 return; 409 410 if (ieee->mode < IEEE_N_24G) { 411 if (skb->len > ieee->rts) { 412 tcb_desc->bRTSEnable = true; 413 tcb_desc->rts_rate = MGN_24M; 414 } else if (ieee->current_network.buseprotection) { 415 tcb_desc->bRTSEnable = true; 416 tcb_desc->bCTSEnable = true; 417 tcb_desc->rts_rate = MGN_24M; 418 } 419 return; 420 } 421 422 pHTInfo = ieee->pHTInfo; 423 424 while (true) { 425 if (pHTInfo->iot_action & HT_IOT_ACT_FORCED_CTS2SELF) { 426 tcb_desc->bCTSEnable = true; 427 tcb_desc->rts_rate = MGN_24M; 428 tcb_desc->bRTSEnable = true; 429 break; 430 } else if (pHTInfo->iot_action & (HT_IOT_ACT_FORCED_RTS | 431 HT_IOT_ACT_PURE_N_MODE)) { 432 tcb_desc->bRTSEnable = true; 433 tcb_desc->rts_rate = MGN_24M; 434 break; 435 } 436 if (ieee->current_network.buseprotection) { 437 tcb_desc->bRTSEnable = true; 438 tcb_desc->bCTSEnable = true; 439 tcb_desc->rts_rate = MGN_24M; 440 break; 441 } 442 if (pHTInfo->bCurrentHTSupport && pHTInfo->bEnableHT) { 443 u8 HTOpMode = pHTInfo->current_op_mode; 444 445 if ((pHTInfo->bCurBW40MHz && (HTOpMode == 2 || 446 HTOpMode == 3)) || 447 (!pHTInfo->bCurBW40MHz && HTOpMode == 3)) { 448 tcb_desc->rts_rate = MGN_24M; 449 tcb_desc->bRTSEnable = true; 450 break; 451 } 452 } 453 if (skb->len > ieee->rts) { 454 tcb_desc->rts_rate = MGN_24M; 455 tcb_desc->bRTSEnable = true; 456 break; 457 } 458 if (tcb_desc->bAMPDUEnable) { 459 tcb_desc->rts_rate = MGN_24M; 460 tcb_desc->bRTSEnable = false; 461 break; 462 } 463 goto NO_PROTECTION; 464 } 465 if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE) 466 tcb_desc->bUseShortPreamble = true; 467 if (ieee->iw_mode == IW_MODE_MASTER) 468 goto NO_PROTECTION; 469 return; 470 NO_PROTECTION: 471 tcb_desc->bRTSEnable = false; 472 tcb_desc->bCTSEnable = false; 473 tcb_desc->rts_rate = 0; 474 tcb_desc->RTSSC = 0; 475 tcb_desc->bRTSBW = false; 476 } 477 478 479 static void rtllib_txrate_selectmode(struct rtllib_device *ieee, 480 struct cb_desc *tcb_desc) 481 { 482 if (ieee->bTxDisableRateFallBack) 483 tcb_desc->bTxDisableRateFallBack = true; 484 485 if (ieee->bTxUseDriverAssingedRate) 486 tcb_desc->bTxUseDriverAssingedRate = true; 487 if (!tcb_desc->bTxDisableRateFallBack || 488 !tcb_desc->bTxUseDriverAssingedRate) { 489 if (ieee->iw_mode == IW_MODE_INFRA || 490 ieee->iw_mode == IW_MODE_ADHOC) 491 tcb_desc->RATRIndex = 0; 492 } 493 } 494 495 static u16 rtllib_query_seqnum(struct rtllib_device *ieee, struct sk_buff *skb, 496 u8 *dst) 497 { 498 u16 seqnum = 0; 499 500 if (is_multicast_ether_addr(dst)) 501 return 0; 502 if (IsQoSDataFrame(skb->data)) { 503 struct tx_ts_record *pTS = NULL; 504 505 if (!GetTs(ieee, (struct ts_common_info **)(&pTS), dst, 506 skb->priority, TX_DIR, true)) 507 return 0; 508 seqnum = pTS->TxCurSeq; 509 pTS->TxCurSeq = (pTS->TxCurSeq+1)%4096; 510 return seqnum; 511 } 512 return 0; 513 } 514 515 static int wme_downgrade_ac(struct sk_buff *skb) 516 { 517 switch (skb->priority) { 518 case 6: 519 case 7: 520 skb->priority = 5; /* VO -> VI */ 521 return 0; 522 case 4: 523 case 5: 524 skb->priority = 3; /* VI -> BE */ 525 return 0; 526 case 0: 527 case 3: 528 skb->priority = 1; /* BE -> BK */ 529 return 0; 530 default: 531 return -1; 532 } 533 } 534 535 static u8 rtllib_current_rate(struct rtllib_device *ieee) 536 { 537 if (ieee->mode & IEEE_MODE_MASK) 538 return ieee->rate; 539 540 if (ieee->HTCurrentOperaRate) 541 return ieee->HTCurrentOperaRate; 542 else 543 return ieee->rate & 0x7F; 544 } 545 546 static int rtllib_xmit_inter(struct sk_buff *skb, struct net_device *dev) 547 { 548 struct rtllib_device *ieee = (struct rtllib_device *) 549 netdev_priv_rsl(dev); 550 struct rtllib_txb *txb = NULL; 551 struct rtllib_hdr_3addrqos *frag_hdr; 552 int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size; 553 unsigned long flags; 554 struct net_device_stats *stats = &ieee->stats; 555 int ether_type = 0, encrypt; 556 int bytes, fc, qos_ctl = 0, hdr_len; 557 struct sk_buff *skb_frag; 558 struct rtllib_hdr_3addrqos header = { /* Ensure zero initialized */ 559 .duration_id = 0, 560 .seq_ctl = 0, 561 .qos_ctl = 0 562 }; 563 int qos_activated = ieee->current_network.qos_data.active; 564 u8 dest[ETH_ALEN]; 565 u8 src[ETH_ALEN]; 566 struct lib80211_crypt_data *crypt = NULL; 567 struct cb_desc *tcb_desc; 568 u8 bIsMulticast = false; 569 u8 IsAmsdu = false; 570 bool bdhcp = false; 571 572 spin_lock_irqsave(&ieee->lock, flags); 573 574 /* If there is no driver handler to take the TXB, don't bother 575 * creating it... 576 */ 577 if ((!ieee->hard_start_xmit && !(ieee->softmac_features & 578 IEEE_SOFTMAC_TX_QUEUE)) || 579 ((!ieee->softmac_data_hard_start_xmit && 580 (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE)))) { 581 netdev_warn(ieee->dev, "No xmit handler.\n"); 582 goto success; 583 } 584 585 586 if (likely(ieee->raw_tx == 0)) { 587 if (unlikely(skb->len < SNAP_SIZE + sizeof(u16))) { 588 netdev_warn(ieee->dev, "skb too small (%d).\n", 589 skb->len); 590 goto success; 591 } 592 /* Save source and destination addresses */ 593 ether_addr_copy(dest, skb->data); 594 ether_addr_copy(src, skb->data + ETH_ALEN); 595 596 memset(skb->cb, 0, sizeof(skb->cb)); 597 ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto); 598 599 if (ieee->iw_mode == IW_MODE_MONITOR) { 600 txb = rtllib_alloc_txb(1, skb->len, GFP_ATOMIC); 601 if (unlikely(!txb)) { 602 netdev_warn(ieee->dev, 603 "Could not allocate TXB\n"); 604 goto failed; 605 } 606 607 txb->encrypted = 0; 608 txb->payload_size = cpu_to_le16(skb->len); 609 skb_put_data(txb->fragments[0], skb->data, skb->len); 610 611 goto success; 612 } 613 614 if (skb->len > 282) { 615 if (ether_type == ETH_P_IP) { 616 const struct iphdr *ip = (struct iphdr *) 617 ((u8 *)skb->data+14); 618 if (ip->protocol == IPPROTO_UDP) { 619 struct udphdr *udp; 620 621 udp = (struct udphdr *)((u8 *)ip + 622 (ip->ihl << 2)); 623 if (((((u8 *)udp)[1] == 68) && 624 (((u8 *)udp)[3] == 67)) || 625 ((((u8 *)udp)[1] == 67) && 626 (((u8 *)udp)[3] == 68))) { 627 bdhcp = true; 628 ieee->LPSDelayCnt = 200; 629 } 630 } 631 } else if (ether_type == ETH_P_ARP) { 632 netdev_info(ieee->dev, 633 "=================>DHCP Protocol start tx ARP pkt!!\n"); 634 bdhcp = true; 635 ieee->LPSDelayCnt = 636 ieee->current_network.tim.tim_count; 637 } 638 } 639 640 skb->priority = rtllib_classify(skb, IsAmsdu); 641 crypt = ieee->crypt_info.crypt[ieee->crypt_info.tx_keyidx]; 642 encrypt = !(ether_type == ETH_P_PAE && ieee->ieee802_1x) && 643 ieee->host_encrypt && crypt && crypt->ops; 644 if (!encrypt && ieee->ieee802_1x && 645 ieee->drop_unencrypted && ether_type != ETH_P_PAE) { 646 stats->tx_dropped++; 647 goto success; 648 } 649 if (crypt && !encrypt && ether_type == ETH_P_PAE) { 650 struct eapol *eap = (struct eapol *)(skb->data + 651 sizeof(struct ethhdr) - SNAP_SIZE - 652 sizeof(u16)); 653 netdev_dbg(ieee->dev, 654 "TX: IEEE 802.11 EAPOL frame: %s\n", 655 eap_get_type(eap->type)); 656 } 657 658 /* Advance the SKB to the start of the payload */ 659 skb_pull(skb, sizeof(struct ethhdr)); 660 661 /* Determine total amount of storage required for TXB packets */ 662 bytes = skb->len + SNAP_SIZE + sizeof(u16); 663 664 if (encrypt) 665 fc = RTLLIB_FTYPE_DATA | RTLLIB_FCTL_WEP; 666 else 667 fc = RTLLIB_FTYPE_DATA; 668 669 if (qos_activated) 670 fc |= RTLLIB_STYPE_QOS_DATA; 671 else 672 fc |= RTLLIB_STYPE_DATA; 673 674 if (ieee->iw_mode == IW_MODE_INFRA) { 675 fc |= RTLLIB_FCTL_TODS; 676 /* To DS: Addr1 = BSSID, Addr2 = SA, 677 * Addr3 = DA 678 */ 679 ether_addr_copy(header.addr1, 680 ieee->current_network.bssid); 681 ether_addr_copy(header.addr2, src); 682 if (IsAmsdu) 683 ether_addr_copy(header.addr3, 684 ieee->current_network.bssid); 685 else 686 ether_addr_copy(header.addr3, dest); 687 } else if (ieee->iw_mode == IW_MODE_ADHOC) { 688 /* not From/To DS: Addr1 = DA, Addr2 = SA, 689 * Addr3 = BSSID 690 */ 691 ether_addr_copy(header.addr1, dest); 692 ether_addr_copy(header.addr2, src); 693 ether_addr_copy(header.addr3, 694 ieee->current_network.bssid); 695 } 696 697 bIsMulticast = is_multicast_ether_addr(header.addr1); 698 699 header.frame_ctl = cpu_to_le16(fc); 700 701 /* Determine fragmentation size based on destination (multicast 702 * and broadcast are not fragmented) 703 */ 704 if (bIsMulticast) { 705 frag_size = MAX_FRAG_THRESHOLD; 706 qos_ctl |= QOS_CTL_NOTCONTAIN_ACK; 707 } else { 708 frag_size = ieee->fts; 709 qos_ctl = 0; 710 } 711 712 if (qos_activated) { 713 hdr_len = RTLLIB_3ADDR_LEN + 2; 714 715 /* in case we are a client verify acm is not set for this ac */ 716 while (unlikely(ieee->wmm_acm & (0x01 << skb->priority))) { 717 netdev_info(ieee->dev, "skb->priority = %x\n", 718 skb->priority); 719 if (wme_downgrade_ac(skb)) 720 break; 721 netdev_info(ieee->dev, "converted skb->priority = %x\n", 722 skb->priority); 723 } 724 725 qos_ctl |= skb->priority; 726 header.qos_ctl = cpu_to_le16(qos_ctl & RTLLIB_QOS_TID); 727 728 } else { 729 hdr_len = RTLLIB_3ADDR_LEN; 730 } 731 /* Determine amount of payload per fragment. Regardless of if 732 * this stack is providing the full 802.11 header, one will 733 * eventually be affixed to this fragment -- so we must account 734 * for it when determining the amount of payload space. 735 */ 736 bytes_per_frag = frag_size - hdr_len; 737 if (ieee->config & 738 (CFG_RTLLIB_COMPUTE_FCS | CFG_RTLLIB_RESERVE_FCS)) 739 bytes_per_frag -= RTLLIB_FCS_LEN; 740 741 /* Each fragment may need to have room for encrypting 742 * pre/postfix 743 */ 744 if (encrypt) { 745 bytes_per_frag -= crypt->ops->extra_mpdu_prefix_len + 746 crypt->ops->extra_mpdu_postfix_len + 747 crypt->ops->extra_msdu_prefix_len + 748 crypt->ops->extra_msdu_postfix_len; 749 } 750 /* Number of fragments is the total bytes_per_frag / 751 * payload_per_fragment 752 */ 753 nr_frags = bytes / bytes_per_frag; 754 bytes_last_frag = bytes % bytes_per_frag; 755 if (bytes_last_frag) 756 nr_frags++; 757 else 758 bytes_last_frag = bytes_per_frag; 759 760 /* When we allocate the TXB we allocate enough space for the 761 * reserve and full fragment bytes (bytes_per_frag doesn't 762 * include prefix, postfix, header, FCS, etc.) 763 */ 764 txb = rtllib_alloc_txb(nr_frags, frag_size + 765 ieee->tx_headroom, GFP_ATOMIC); 766 if (unlikely(!txb)) { 767 netdev_warn(ieee->dev, "Could not allocate TXB\n"); 768 goto failed; 769 } 770 txb->encrypted = encrypt; 771 txb->payload_size = cpu_to_le16(bytes); 772 773 if (qos_activated) 774 txb->queue_index = UP2AC(skb->priority); 775 else 776 txb->queue_index = WME_AC_BE; 777 778 for (i = 0; i < nr_frags; i++) { 779 skb_frag = txb->fragments[i]; 780 tcb_desc = (struct cb_desc *)(skb_frag->cb + 781 MAX_DEV_ADDR_SIZE); 782 if (qos_activated) { 783 skb_frag->priority = skb->priority; 784 tcb_desc->queue_index = UP2AC(skb->priority); 785 } else { 786 skb_frag->priority = WME_AC_BE; 787 tcb_desc->queue_index = WME_AC_BE; 788 } 789 skb_reserve(skb_frag, ieee->tx_headroom); 790 791 if (encrypt) { 792 if (ieee->hwsec_active) 793 tcb_desc->bHwSec = 1; 794 else 795 tcb_desc->bHwSec = 0; 796 skb_reserve(skb_frag, 797 crypt->ops->extra_mpdu_prefix_len + 798 crypt->ops->extra_msdu_prefix_len); 799 } else { 800 tcb_desc->bHwSec = 0; 801 } 802 frag_hdr = skb_put_data(skb_frag, &header, hdr_len); 803 804 /* If this is not the last fragment, then add the 805 * MOREFRAGS bit to the frame control 806 */ 807 if (i != nr_frags - 1) { 808 frag_hdr->frame_ctl = cpu_to_le16( 809 fc | RTLLIB_FCTL_MOREFRAGS); 810 bytes = bytes_per_frag; 811 812 } else { 813 /* The last fragment has the remaining length */ 814 bytes = bytes_last_frag; 815 } 816 if ((qos_activated) && (!bIsMulticast)) { 817 frag_hdr->seq_ctl = 818 cpu_to_le16(rtllib_query_seqnum(ieee, skb_frag, 819 header.addr1)); 820 frag_hdr->seq_ctl = 821 cpu_to_le16(le16_to_cpu(frag_hdr->seq_ctl)<<4 | i); 822 } else { 823 frag_hdr->seq_ctl = 824 cpu_to_le16(ieee->seq_ctrl[0]<<4 | i); 825 } 826 /* Put a SNAP header on the first fragment */ 827 if (i == 0) { 828 rtllib_put_snap( 829 skb_put(skb_frag, SNAP_SIZE + 830 sizeof(u16)), ether_type); 831 bytes -= SNAP_SIZE + sizeof(u16); 832 } 833 834 skb_put_data(skb_frag, skb->data, bytes); 835 836 /* Advance the SKB... */ 837 skb_pull(skb, bytes); 838 839 /* Encryption routine will move the header forward in 840 * order to insert the IV between the header and the 841 * payload 842 */ 843 if (encrypt) 844 rtllib_encrypt_fragment(ieee, skb_frag, 845 hdr_len); 846 if (ieee->config & 847 (CFG_RTLLIB_COMPUTE_FCS | CFG_RTLLIB_RESERVE_FCS)) 848 skb_put(skb_frag, 4); 849 } 850 851 if ((qos_activated) && (!bIsMulticast)) { 852 if (ieee->seq_ctrl[UP2AC(skb->priority) + 1] == 0xFFF) 853 ieee->seq_ctrl[UP2AC(skb->priority) + 1] = 0; 854 else 855 ieee->seq_ctrl[UP2AC(skb->priority) + 1]++; 856 } else { 857 if (ieee->seq_ctrl[0] == 0xFFF) 858 ieee->seq_ctrl[0] = 0; 859 else 860 ieee->seq_ctrl[0]++; 861 } 862 } else { 863 if (unlikely(skb->len < sizeof(struct rtllib_hdr_3addr))) { 864 netdev_warn(ieee->dev, "skb too small (%d).\n", 865 skb->len); 866 goto success; 867 } 868 869 txb = rtllib_alloc_txb(1, skb->len, GFP_ATOMIC); 870 if (!txb) { 871 netdev_warn(ieee->dev, "Could not allocate TXB\n"); 872 goto failed; 873 } 874 875 txb->encrypted = 0; 876 txb->payload_size = cpu_to_le16(skb->len); 877 skb_put_data(txb->fragments[0], skb->data, skb->len); 878 } 879 880 success: 881 if (txb) { 882 tcb_desc = (struct cb_desc *) 883 (txb->fragments[0]->cb + MAX_DEV_ADDR_SIZE); 884 tcb_desc->bTxEnableFwCalcDur = 1; 885 tcb_desc->priority = skb->priority; 886 887 if (ether_type == ETH_P_PAE) { 888 if (ieee->pHTInfo->iot_action & 889 HT_IOT_ACT_WA_IOT_Broadcom) { 890 tcb_desc->data_rate = 891 MgntQuery_TxRateExcludeCCKRates(ieee); 892 tcb_desc->bTxDisableRateFallBack = false; 893 } else { 894 tcb_desc->data_rate = ieee->basic_rate; 895 tcb_desc->bTxDisableRateFallBack = 1; 896 } 897 898 899 tcb_desc->RATRIndex = 7; 900 tcb_desc->bTxUseDriverAssingedRate = 1; 901 } else { 902 if (is_multicast_ether_addr(header.addr1)) 903 tcb_desc->bMulticast = 1; 904 if (is_broadcast_ether_addr(header.addr1)) 905 tcb_desc->bBroadcast = 1; 906 rtllib_txrate_selectmode(ieee, tcb_desc); 907 if (tcb_desc->bMulticast || tcb_desc->bBroadcast) 908 tcb_desc->data_rate = ieee->basic_rate; 909 else 910 tcb_desc->data_rate = rtllib_current_rate(ieee); 911 912 if (bdhcp) { 913 if (ieee->pHTInfo->iot_action & 914 HT_IOT_ACT_WA_IOT_Broadcom) { 915 tcb_desc->data_rate = 916 MgntQuery_TxRateExcludeCCKRates(ieee); 917 tcb_desc->bTxDisableRateFallBack = false; 918 } else { 919 tcb_desc->data_rate = MGN_1M; 920 tcb_desc->bTxDisableRateFallBack = 1; 921 } 922 923 924 tcb_desc->RATRIndex = 7; 925 tcb_desc->bTxUseDriverAssingedRate = 1; 926 tcb_desc->bdhcp = 1; 927 } 928 929 rtllib_query_ShortPreambleMode(ieee, tcb_desc); 930 rtllib_tx_query_agg_cap(ieee, txb->fragments[0], 931 tcb_desc); 932 rtllib_query_HTCapShortGI(ieee, tcb_desc); 933 rtllib_query_BandwidthMode(ieee, tcb_desc); 934 rtllib_query_protectionmode(ieee, tcb_desc, 935 txb->fragments[0]); 936 } 937 } 938 spin_unlock_irqrestore(&ieee->lock, flags); 939 dev_kfree_skb_any(skb); 940 if (txb) { 941 if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE) { 942 dev->stats.tx_packets++; 943 dev->stats.tx_bytes += le16_to_cpu(txb->payload_size); 944 rtllib_softmac_xmit(txb, ieee); 945 } else { 946 if ((*ieee->hard_start_xmit)(txb, dev) == 0) { 947 stats->tx_packets++; 948 stats->tx_bytes += le16_to_cpu(txb->payload_size); 949 return 0; 950 } 951 rtllib_txb_free(txb); 952 } 953 } 954 955 return 0; 956 957 failed: 958 spin_unlock_irqrestore(&ieee->lock, flags); 959 netif_stop_queue(dev); 960 stats->tx_errors++; 961 return 1; 962 963 } 964 965 netdev_tx_t rtllib_xmit(struct sk_buff *skb, struct net_device *dev) 966 { 967 memset(skb->cb, 0, sizeof(skb->cb)); 968 return rtllib_xmit_inter(skb, dev) ? NETDEV_TX_BUSY : NETDEV_TX_OK; 969 } 970 EXPORT_SYMBOL(rtllib_xmit); 971