ieee80211_tx.c revision 859171ca92f2865453b4b2e17bf679c67044a833
1/****************************************************************************** 2 3 Copyright(c) 2003 - 2004 Intel Corporation. All rights reserved. 4 5 This program is free software; you can redistribute it and/or modify it 6 under the terms of version 2 of the GNU General Public License as 7 published by the Free Software Foundation. 8 9 This program is distributed in the hope that it will be useful, but WITHOUT 10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 more details. 13 14 You should have received a copy of the GNU General Public License along with 15 this program; if not, write to the Free Software Foundation, Inc., 59 16 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17 18 The full GNU General Public License is included in this distribution in the 19 file called LICENSE. 20 21 Contact Information: 22 James P. Ketrenos <ipw2100-admin@linux.intel.com> 23 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 24 25****************************************************************************** 26 27 Few modifications for Realtek's Wi-Fi drivers by 28 Andrea Merello <andreamrl@tiscali.it> 29 30 A special thanks goes to Realtek for their support ! 31 32******************************************************************************/ 33 34#include <linux/compiler.h> 35//#include <linux/config.h> 36#include <linux/errno.h> 37#include <linux/if_arp.h> 38#include <linux/in6.h> 39#include <linux/in.h> 40#include <linux/ip.h> 41#include <linux/kernel.h> 42#include <linux/module.h> 43#include <linux/netdevice.h> 44#include <linux/pci.h> 45#include <linux/proc_fs.h> 46#include <linux/skbuff.h> 47#include <linux/slab.h> 48#include <linux/tcp.h> 49#include <linux/types.h> 50#include <linux/wireless.h> 51#include <linux/etherdevice.h> 52#include <asm/uaccess.h> 53#include <linux/if_vlan.h> 54 55#include "ieee80211.h" 56 57 58/* 59 60 61802.11 Data Frame 62 63 64802.11 frame_contorl for data frames - 2 bytes 65 ,-----------------------------------------------------------------------------------------. 66bits | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | a | b | c | d | e | 67 |----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|------| 68val | 0 | 0 | 0 | 1 | x | 0 | 0 | 0 | 1 | 0 | x | x | x | x | x | 69 |----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|-----|------| 70desc | ^-ver-^ | ^type-^ | ^-----subtype-----^ | to |from |more |retry| pwr |more |wep | 71 | | | x=0 data,x=1 data+ack | DS | DS |frag | | mgm |data | | 72 '-----------------------------------------------------------------------------------------' 73 /\ 74 | 75802.11 Data Frame | 76 ,--------- 'ctrl' expands to >-----------' 77 | 78 ,--'---,-------------------------------------------------------------. 79Bytes | 2 | 2 | 6 | 6 | 6 | 2 | 0..2312 | 4 | 80 |------|------|---------|---------|---------|------|---------|------| 81Desc. | ctrl | dura | DA/RA | TA | SA | Sequ | Frame | fcs | 82 | | tion | (BSSID) | | | ence | data | | 83 `--------------------------------------------------| |------' 84Total: 28 non-data bytes `----.----' 85 | 86 .- 'Frame data' expands to <---------------------------' 87 | 88 V 89 ,---------------------------------------------------. 90Bytes | 1 | 1 | 1 | 3 | 2 | 0-2304 | 91 |------|------|---------|----------|------|---------| 92Desc. | SNAP | SNAP | Control |Eth Tunnel| Type | IP | 93 | DSAP | SSAP | | | | Packet | 94 | 0xAA | 0xAA |0x03 (UI)|0x00-00-F8| | | 95 `-----------------------------------------| | 96Total: 8 non-data bytes `----.----' 97 | 98 .- 'IP Packet' expands, if WEP enabled, to <--' 99 | 100 V 101 ,-----------------------. 102Bytes | 4 | 0-2296 | 4 | 103 |-----|-----------|-----| 104Desc. | IV | Encrypted | ICV | 105 | | IP Packet | | 106 `-----------------------' 107Total: 8 non-data bytes 108 109 110802.3 Ethernet Data Frame 111 112 ,-----------------------------------------. 113Bytes | 6 | 6 | 2 | Variable | 4 | 114 |-------|-------|------|-----------|------| 115Desc. | Dest. | Source| Type | IP Packet | fcs | 116 | MAC | MAC | | | | 117 `-----------------------------------------' 118Total: 18 non-data bytes 119 120In the event that fragmentation is required, the incoming payload is split into 121N parts of size ieee->fts. The first fragment contains the SNAP header and the 122remaining packets are just data. 123 124If encryption is enabled, each fragment payload size is reduced by enough space 125to add the prefix and postfix (IV and ICV totalling 8 bytes in the case of WEP) 126So if you have 1500 bytes of payload with ieee->fts set to 500 without 127encryption it will take 3 frames. With WEP it will take 4 frames as the 128payload of each frame is reduced to 492 bytes. 129 130* SKB visualization 131* 132* ,- skb->data 133* | 134* | ETHERNET HEADER ,-<-- PAYLOAD 135* | | 14 bytes from skb->data 136* | 2 bytes for Type --> ,T. | (sizeof ethhdr) 137* | | | | 138* |,-Dest.--. ,--Src.---. | | | 139* | 6 bytes| | 6 bytes | | | | 140* v | | | | | | 141* 0 | v 1 | v | v 2 142* 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 5 143* ^ | ^ | ^ | 144* | | | | | | 145* | | | | `T' <---- 2 bytes for Type 146* | | | | 147* | | '---SNAP--' <-------- 6 bytes for SNAP 148* | | 149* `-IV--' <-------------------- 4 bytes for IV (WEP) 150* 151* SNAP HEADER 152* 153*/ 154 155static u8 P802_1H_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0xf8 }; 156static u8 RFC1042_OUI[P80211_OUI_LEN] = { 0x00, 0x00, 0x00 }; 157 158static inline int ieee80211_put_snap(u8 *data, u16 h_proto) 159{ 160 struct ieee80211_snap_hdr *snap; 161 u8 *oui; 162 163 snap = (struct ieee80211_snap_hdr *)data; 164 snap->dsap = 0xaa; 165 snap->ssap = 0xaa; 166 snap->ctrl = 0x03; 167 168 if (h_proto == 0x8137 || h_proto == 0x80f3) 169 oui = P802_1H_OUI; 170 else 171 oui = RFC1042_OUI; 172 snap->oui[0] = oui[0]; 173 snap->oui[1] = oui[1]; 174 snap->oui[2] = oui[2]; 175 176 *(u16 *)(data + SNAP_SIZE) = htons(h_proto); 177 178 return SNAP_SIZE + sizeof(u16); 179} 180 181int ieee80211_encrypt_fragment( 182 struct ieee80211_device *ieee, 183 struct sk_buff *frag, 184 int hdr_len) 185{ 186 struct ieee80211_crypt_data* crypt = ieee->crypt[ieee->tx_keyidx]; 187 int res; 188 189 if (!(crypt && crypt->ops)) 190 { 191 printk("=========>%s(), crypt is null\n", __FUNCTION__); 192 return -1; 193 } 194#ifdef CONFIG_IEEE80211_CRYPT_TKIP 195 struct ieee80211_hdr *header; 196 197 if (ieee->tkip_countermeasures && 198 crypt && crypt->ops && strcmp(crypt->ops->name, "TKIP") == 0) { 199 header = (struct ieee80211_hdr *) frag->data; 200 if (net_ratelimit()) { 201 printk(KERN_DEBUG "%s: TKIP countermeasures: dropped " 202 "TX packet to %pM\n", 203 ieee->dev->name, header->addr1); 204 } 205 return -1; 206 } 207#endif 208 /* To encrypt, frame format is: 209 * IV (4 bytes), clear payload (including SNAP), ICV (4 bytes) */ 210 211 // PR: FIXME: Copied from hostap. Check fragmentation/MSDU/MPDU encryption. 212 /* Host-based IEEE 802.11 fragmentation for TX is not yet supported, so 213 * call both MSDU and MPDU encryption functions from here. */ 214 atomic_inc(&crypt->refcnt); 215 res = 0; 216 if (crypt->ops->encrypt_msdu) 217 res = crypt->ops->encrypt_msdu(frag, hdr_len, crypt->priv); 218 if (res == 0 && crypt->ops->encrypt_mpdu) 219 res = crypt->ops->encrypt_mpdu(frag, hdr_len, crypt->priv); 220 221 atomic_dec(&crypt->refcnt); 222 if (res < 0) { 223 printk(KERN_INFO "%s: Encryption failed: len=%d.\n", 224 ieee->dev->name, frag->len); 225 ieee->ieee_stats.tx_discards++; 226 return -1; 227 } 228 229 return 0; 230} 231 232 233void ieee80211_txb_free(struct ieee80211_txb *txb) { 234 //int i; 235 if (unlikely(!txb)) 236 return; 237 kfree(txb); 238} 239 240struct ieee80211_txb *ieee80211_alloc_txb(int nr_frags, int txb_size, 241 int gfp_mask) 242{ 243 struct ieee80211_txb *txb; 244 int i; 245 txb = kmalloc( 246 sizeof(struct ieee80211_txb) + (sizeof(u8*) * nr_frags), 247 gfp_mask); 248 if (!txb) 249 return NULL; 250 251 memset(txb, 0, sizeof(struct ieee80211_txb)); 252 txb->nr_frags = nr_frags; 253 txb->frag_size = txb_size; 254 255 for (i = 0; i < nr_frags; i++) { 256 txb->fragments[i] = dev_alloc_skb(txb_size); 257 if (unlikely(!txb->fragments[i])) { 258 i--; 259 break; 260 } 261 memset(txb->fragments[i]->cb, 0, sizeof(txb->fragments[i]->cb)); 262 } 263 if (unlikely(i != nr_frags)) { 264 while (i >= 0) 265 dev_kfree_skb_any(txb->fragments[i--]); 266 kfree(txb); 267 return NULL; 268 } 269 return txb; 270} 271 272// Classify the to-be send data packet 273// Need to acquire the sent queue index. 274static int 275ieee80211_classify(struct sk_buff *skb, struct ieee80211_network *network) 276{ 277 struct ethhdr *eth; 278 struct iphdr *ip; 279 eth = (struct ethhdr *)skb->data; 280 if (eth->h_proto != htons(ETH_P_IP)) 281 return 0; 282 283// IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len); 284 ip = ip_hdr(skb); 285 switch (ip->tos & 0xfc) { 286 case 0x20: 287 return 2; 288 case 0x40: 289 return 1; 290 case 0x60: 291 return 3; 292 case 0x80: 293 return 4; 294 case 0xa0: 295 return 5; 296 case 0xc0: 297 return 6; 298 case 0xe0: 299 return 7; 300 default: 301 return 0; 302 } 303} 304 305#define SN_LESS(a, b) (((a-b)&0x800)!=0) 306void ieee80211_tx_query_agg_cap(struct ieee80211_device* ieee, struct sk_buff* skb, cb_desc* tcb_desc) 307{ 308 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo; 309 PTX_TS_RECORD pTxTs = NULL; 310 struct ieee80211_hdr_1addr* hdr = (struct ieee80211_hdr_1addr*)skb->data; 311 312 if (!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT) 313 return; 314 if (!IsQoSDataFrame(skb->data)) 315 return; 316 317 if (is_multicast_ether_addr(hdr->addr1) || is_broadcast_ether_addr(hdr->addr1)) 318 return; 319 //check packet and mode later 320#ifdef TO_DO_LIST 321 if(pTcb->PacketLength >= 4096) 322 return; 323 // For RTL819X, if pairwisekey = wep/tkip, we don't aggrregation. 324 if(!Adapter->HalFunc.GetNmodeSupportBySecCfgHandler(Adapter)) 325 return; 326#endif 327 if(!ieee->GetNmodeSupportBySecCfg(ieee->dev)) 328 { 329 return; 330 } 331 if(pHTInfo->bCurrentAMPDUEnable) 332 { 333 if (!GetTs(ieee, (PTS_COMMON_INFO*)(&pTxTs), hdr->addr1, skb->priority, TX_DIR, true)) 334 { 335 printk("===>can't get TS\n"); 336 return; 337 } 338 if (pTxTs->TxAdmittedBARecord.bValid == false) 339 { 340 TsStartAddBaProcess(ieee, pTxTs); 341 goto FORCED_AGG_SETTING; 342 } 343 else if (pTxTs->bUsingBa == false) 344 { 345 if (SN_LESS(pTxTs->TxAdmittedBARecord.BaStartSeqCtrl.field.SeqNum, (pTxTs->TxCurSeq+1)%4096)) 346 pTxTs->bUsingBa = true; 347 else 348 goto FORCED_AGG_SETTING; 349 } 350 351 if (ieee->iw_mode == IW_MODE_INFRA) 352 { 353 tcb_desc->bAMPDUEnable = true; 354 tcb_desc->ampdu_factor = pHTInfo->CurrentAMPDUFactor; 355 tcb_desc->ampdu_density = pHTInfo->CurrentMPDUDensity; 356 } 357 } 358FORCED_AGG_SETTING: 359 switch(pHTInfo->ForcedAMPDUMode ) 360 { 361 case HT_AGG_AUTO: 362 break; 363 364 case HT_AGG_FORCE_ENABLE: 365 tcb_desc->bAMPDUEnable = true; 366 tcb_desc->ampdu_density = pHTInfo->ForcedMPDUDensity; 367 tcb_desc->ampdu_factor = pHTInfo->ForcedAMPDUFactor; 368 break; 369 370 case HT_AGG_FORCE_DISABLE: 371 tcb_desc->bAMPDUEnable = false; 372 tcb_desc->ampdu_density = 0; 373 tcb_desc->ampdu_factor = 0; 374 break; 375 376 } 377 return; 378} 379 380extern void ieee80211_qurey_ShortPreambleMode(struct ieee80211_device* ieee, cb_desc* tcb_desc) 381{ 382 tcb_desc->bUseShortPreamble = false; 383 if (tcb_desc->data_rate == 2) 384 {//// 1M can only use Long Preamble. 11B spec 385 return; 386 } 387 else if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE) 388 { 389 tcb_desc->bUseShortPreamble = true; 390 } 391 return; 392} 393extern void 394ieee80211_query_HTCapShortGI(struct ieee80211_device *ieee, cb_desc *tcb_desc) 395{ 396 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo; 397 398 tcb_desc->bUseShortGI = false; 399 400 if(!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT) 401 return; 402 403 if(pHTInfo->bForcedShortGI) 404 { 405 tcb_desc->bUseShortGI = true; 406 return; 407 } 408 409 if((pHTInfo->bCurBW40MHz==true) && pHTInfo->bCurShortGI40MHz) 410 tcb_desc->bUseShortGI = true; 411 else if((pHTInfo->bCurBW40MHz==false) && pHTInfo->bCurShortGI20MHz) 412 tcb_desc->bUseShortGI = true; 413} 414 415void ieee80211_query_BandwidthMode(struct ieee80211_device* ieee, cb_desc *tcb_desc) 416{ 417 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo; 418 419 tcb_desc->bPacketBW = false; 420 421 if(!pHTInfo->bCurrentHTSupport||!pHTInfo->bEnableHT) 422 return; 423 424 if(tcb_desc->bMulticast || tcb_desc->bBroadcast) 425 return; 426 427 if((tcb_desc->data_rate & 0x80)==0) // If using legacy rate, it shall use 20MHz channel. 428 return; 429 //BandWidthAutoSwitch is for auto switch to 20 or 40 in long distance 430 if(pHTInfo->bCurBW40MHz && pHTInfo->bCurTxBW40MHz && !ieee->bandwidth_auto_switch.bforced_tx20Mhz) 431 tcb_desc->bPacketBW = true; 432 return; 433} 434 435void ieee80211_query_protectionmode(struct ieee80211_device* ieee, cb_desc* tcb_desc, struct sk_buff* skb) 436{ 437 // Common Settings 438 tcb_desc->bRTSSTBC = false; 439 tcb_desc->bRTSUseShortGI = false; // Since protection frames are always sent by legacy rate, ShortGI will never be used. 440 tcb_desc->bCTSEnable = false; // Most of protection using RTS/CTS 441 tcb_desc->RTSSC = 0; // 20MHz: Don't care; 40MHz: Duplicate. 442 tcb_desc->bRTSBW = false; // RTS frame bandwidth is always 20MHz 443 444 if(tcb_desc->bBroadcast || tcb_desc->bMulticast)//only unicast frame will use rts/cts 445 return; 446 447 if (is_broadcast_ether_addr(skb->data+16)) //check addr3 as infrastructure add3 is DA. 448 return; 449 450 if (ieee->mode < IEEE_N_24G) //b, g mode 451 { 452 // (1) RTS_Threshold is compared to the MPDU, not MSDU. 453 // (2) If there are more than one frag in this MSDU, only the first frag uses protection frame. 454 // Other fragments are protected by previous fragment. 455 // So we only need to check the length of first fragment. 456 if (skb->len > ieee->rts) 457 { 458 tcb_desc->bRTSEnable = true; 459 tcb_desc->rts_rate = MGN_24M; 460 } 461 else if (ieee->current_network.buseprotection) 462 { 463 // Use CTS-to-SELF in protection mode. 464 tcb_desc->bRTSEnable = true; 465 tcb_desc->bCTSEnable = true; 466 tcb_desc->rts_rate = MGN_24M; 467 } 468 //otherwise return; 469 return; 470 } 471 else 472 {// 11n High throughput case. 473 PRT_HIGH_THROUGHPUT pHTInfo = ieee->pHTInfo; 474 while (true) 475 { 476 //check ERP protection 477 if (ieee->current_network.buseprotection) 478 {// CTS-to-SELF 479 tcb_desc->bRTSEnable = true; 480 tcb_desc->bCTSEnable = true; 481 tcb_desc->rts_rate = MGN_24M; 482 break; 483 } 484 //check HT op mode 485 if(pHTInfo->bCurrentHTSupport && pHTInfo->bEnableHT) 486 { 487 u8 HTOpMode = pHTInfo->CurrentOpMode; 488 if((pHTInfo->bCurBW40MHz && (HTOpMode == 2 || HTOpMode == 3)) || 489 (!pHTInfo->bCurBW40MHz && HTOpMode == 3) ) 490 { 491 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps. 492 tcb_desc->bRTSEnable = true; 493 break; 494 } 495 } 496 //check rts 497 if (skb->len > ieee->rts) 498 { 499 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps. 500 tcb_desc->bRTSEnable = true; 501 break; 502 } 503 //to do list: check MIMO power save condition. 504 //check AMPDU aggregation for TXOP 505 if(tcb_desc->bAMPDUEnable) 506 { 507 tcb_desc->rts_rate = MGN_24M; // Rate is 24Mbps. 508 // According to 8190 design, firmware sends CF-End only if RTS/CTS is enabled. However, it degrads 509 // throughput around 10M, so we disable of this mechanism. 2007.08.03 by Emily 510 tcb_desc->bRTSEnable = false; 511 break; 512 } 513 //check IOT action 514 if(pHTInfo->IOTAction & HT_IOT_ACT_FORCED_CTS2SELF) 515 { 516 tcb_desc->bCTSEnable = true; 517 tcb_desc->rts_rate = MGN_24M; 518 tcb_desc->bRTSEnable = true; 519 break; 520 } 521 // Totally no protection case!! 522 goto NO_PROTECTION; 523 } 524 } 525 // For test , CTS replace with RTS 526 if( 0 ) 527 { 528 tcb_desc->bCTSEnable = true; 529 tcb_desc->rts_rate = MGN_24M; 530 tcb_desc->bRTSEnable = true; 531 } 532 if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE) 533 tcb_desc->bUseShortPreamble = true; 534 if (ieee->mode == IW_MODE_MASTER) 535 goto NO_PROTECTION; 536 return; 537NO_PROTECTION: 538 tcb_desc->bRTSEnable = false; 539 tcb_desc->bCTSEnable = false; 540 tcb_desc->rts_rate = 0; 541 tcb_desc->RTSSC = 0; 542 tcb_desc->bRTSBW = false; 543} 544 545 546void ieee80211_txrate_selectmode(struct ieee80211_device* ieee, cb_desc* tcb_desc) 547{ 548#ifdef TO_DO_LIST 549 if(!IsDataFrame(pFrame)) 550 { 551 pTcb->bTxDisableRateFallBack = TRUE; 552 pTcb->bTxUseDriverAssingedRate = TRUE; 553 pTcb->RATRIndex = 7; 554 return; 555 } 556 557 if(pMgntInfo->ForcedDataRate!= 0) 558 { 559 pTcb->bTxDisableRateFallBack = TRUE; 560 pTcb->bTxUseDriverAssingedRate = TRUE; 561 return; 562 } 563#endif 564 if(ieee->bTxDisableRateFallBack) 565 tcb_desc->bTxDisableRateFallBack = true; 566 567 if(ieee->bTxUseDriverAssingedRate) 568 tcb_desc->bTxUseDriverAssingedRate = true; 569 if(!tcb_desc->bTxDisableRateFallBack || !tcb_desc->bTxUseDriverAssingedRate) 570 { 571 if (ieee->iw_mode == IW_MODE_INFRA || ieee->iw_mode == IW_MODE_ADHOC) 572 tcb_desc->RATRIndex = 0; 573 } 574} 575 576void ieee80211_query_seqnum(struct ieee80211_device*ieee, struct sk_buff* skb, u8* dst) 577{ 578 if (is_multicast_ether_addr(dst) || is_broadcast_ether_addr(dst)) 579 return; 580 if (IsQoSDataFrame(skb->data)) //we deal qos data only 581 { 582 PTX_TS_RECORD pTS = NULL; 583 if (!GetTs(ieee, (PTS_COMMON_INFO*)(&pTS), dst, skb->priority, TX_DIR, true)) 584 { 585 return; 586 } 587 pTS->TxCurSeq = (pTS->TxCurSeq+1)%4096; 588 } 589} 590 591int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev) 592{ 593 struct ieee80211_device *ieee = netdev_priv(dev); 594 struct ieee80211_txb *txb = NULL; 595 struct ieee80211_hdr_3addrqos *frag_hdr; 596 int i, bytes_per_frag, nr_frags, bytes_last_frag, frag_size; 597 unsigned long flags; 598 struct net_device_stats *stats = &ieee->stats; 599 int ether_type = 0, encrypt; 600 int bytes, fc, qos_ctl = 0, hdr_len; 601 struct sk_buff *skb_frag; 602 struct ieee80211_hdr_3addrqos header = { /* Ensure zero initialized */ 603 .duration_id = 0, 604 .seq_ctl = 0, 605 .qos_ctl = 0 606 }; 607 u8 dest[ETH_ALEN], src[ETH_ALEN]; 608 int qos_actived = ieee->current_network.qos_data.active; 609 610 struct ieee80211_crypt_data* crypt; 611 612 cb_desc *tcb_desc; 613 614 spin_lock_irqsave(&ieee->lock, flags); 615 616 /* If there is no driver handler to take the TXB, dont' bother 617 * creating it... */ 618 if ((!ieee->hard_start_xmit && !(ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE))|| 619 ((!ieee->softmac_data_hard_start_xmit && (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE)))) { 620 printk(KERN_WARNING "%s: No xmit handler.\n", 621 ieee->dev->name); 622 goto success; 623 } 624 625 626 if(likely(ieee->raw_tx == 0)){ 627 if (unlikely(skb->len < SNAP_SIZE + sizeof(u16))) { 628 printk(KERN_WARNING "%s: skb too small (%d).\n", 629 ieee->dev->name, skb->len); 630 goto success; 631 } 632 633 memset(skb->cb, 0, sizeof(skb->cb)); 634 ether_type = ntohs(((struct ethhdr *)skb->data)->h_proto); 635 636 crypt = ieee->crypt[ieee->tx_keyidx]; 637 638 encrypt = !(ether_type == ETH_P_PAE && ieee->ieee802_1x) && 639 ieee->host_encrypt && crypt && crypt->ops; 640 641 if (!encrypt && ieee->ieee802_1x && 642 ieee->drop_unencrypted && ether_type != ETH_P_PAE) { 643 stats->tx_dropped++; 644 goto success; 645 } 646 #ifdef CONFIG_IEEE80211_DEBUG 647 if (crypt && !encrypt && ether_type == ETH_P_PAE) { 648 struct eapol *eap = (struct eapol *)(skb->data + 649 sizeof(struct ethhdr) - SNAP_SIZE - sizeof(u16)); 650 IEEE80211_DEBUG_EAP("TX: IEEE 802.11 EAPOL frame: %s\n", 651 eap_get_type(eap->type)); 652 } 653 #endif 654 655 /* Save source and destination addresses */ 656 memcpy(&dest, skb->data, ETH_ALEN); 657 memcpy(&src, skb->data+ETH_ALEN, ETH_ALEN); 658 659 /* Advance the SKB to the start of the payload */ 660 skb_pull(skb, sizeof(struct ethhdr)); 661 662 /* Determine total amount of storage required for TXB packets */ 663 bytes = skb->len + SNAP_SIZE + sizeof(u16); 664 665 if (encrypt) 666 fc = IEEE80211_FTYPE_DATA | IEEE80211_FCTL_WEP; 667 else 668 669 fc = IEEE80211_FTYPE_DATA; 670 671 //if(ieee->current_network.QoS_Enable) 672 if(qos_actived) 673 fc |= IEEE80211_STYPE_QOS_DATA; 674 else 675 fc |= IEEE80211_STYPE_DATA; 676 677 if (ieee->iw_mode == IW_MODE_INFRA) { 678 fc |= IEEE80211_FCTL_TODS; 679 /* To DS: Addr1 = BSSID, Addr2 = SA, 680 Addr3 = DA */ 681 memcpy(&header.addr1, ieee->current_network.bssid, ETH_ALEN); 682 memcpy(&header.addr2, &src, ETH_ALEN); 683 memcpy(&header.addr3, &dest, ETH_ALEN); 684 } else if (ieee->iw_mode == IW_MODE_ADHOC) { 685 /* not From/To DS: Addr1 = DA, Addr2 = SA, 686 Addr3 = BSSID */ 687 memcpy(&header.addr1, dest, ETH_ALEN); 688 memcpy(&header.addr2, src, ETH_ALEN); 689 memcpy(&header.addr3, ieee->current_network.bssid, ETH_ALEN); 690 } 691 692 header.frame_ctl = cpu_to_le16(fc); 693 694 /* Determine fragmentation size based on destination (multicast 695 * and broadcast are not fragmented) */ 696 if (is_multicast_ether_addr(header.addr1) || 697 is_broadcast_ether_addr(header.addr1)) { 698 frag_size = MAX_FRAG_THRESHOLD; 699 qos_ctl |= QOS_CTL_NOTCONTAIN_ACK; 700 } 701 else { 702 frag_size = ieee->fts;//default:392 703 qos_ctl = 0; 704 } 705 706 //if (ieee->current_network.QoS_Enable) 707 if(qos_actived) 708 { 709 hdr_len = IEEE80211_3ADDR_LEN + 2; 710 711 skb->priority = ieee80211_classify(skb, &ieee->current_network); 712 qos_ctl |= skb->priority; //set in the ieee80211_classify 713 header.qos_ctl = cpu_to_le16(qos_ctl & IEEE80211_QOS_TID); 714 } else { 715 hdr_len = IEEE80211_3ADDR_LEN; 716 } 717 /* Determine amount of payload per fragment. Regardless of if 718 * this stack is providing the full 802.11 header, one will 719 * eventually be affixed to this fragment -- so we must account for 720 * it when determining the amount of payload space. */ 721 bytes_per_frag = frag_size - hdr_len; 722 if (ieee->config & 723 (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS)) 724 bytes_per_frag -= IEEE80211_FCS_LEN; 725 726 /* Each fragment may need to have room for encryptiong pre/postfix */ 727 if (encrypt) 728 bytes_per_frag -= crypt->ops->extra_prefix_len + 729 crypt->ops->extra_postfix_len; 730 731 /* Number of fragments is the total bytes_per_frag / 732 * payload_per_fragment */ 733 nr_frags = bytes / bytes_per_frag; 734 bytes_last_frag = bytes % bytes_per_frag; 735 if (bytes_last_frag) 736 nr_frags++; 737 else 738 bytes_last_frag = bytes_per_frag; 739 740 /* When we allocate the TXB we allocate enough space for the reserve 741 * and full fragment bytes (bytes_per_frag doesn't include prefix, 742 * postfix, header, FCS, etc.) */ 743 txb = ieee80211_alloc_txb(nr_frags, frag_size + ieee->tx_headroom, GFP_ATOMIC); 744 if (unlikely(!txb)) { 745 printk(KERN_WARNING "%s: Could not allocate TXB\n", 746 ieee->dev->name); 747 goto failed; 748 } 749 txb->encrypted = encrypt; 750 txb->payload_size = bytes; 751 752 //if (ieee->current_network.QoS_Enable) 753 if(qos_actived) 754 { 755 txb->queue_index = UP2AC(skb->priority); 756 } else { 757 txb->queue_index = WME_AC_BK; 758 } 759 760 761 762 for (i = 0; i < nr_frags; i++) { 763 skb_frag = txb->fragments[i]; 764 tcb_desc = (cb_desc *)(skb_frag->cb + MAX_DEV_ADDR_SIZE); 765 if(qos_actived){ 766 skb_frag->priority = skb->priority;//UP2AC(skb->priority); 767 tcb_desc->queue_index = UP2AC(skb->priority); 768 } else { 769 skb_frag->priority = WME_AC_BK; 770 tcb_desc->queue_index = WME_AC_BK; 771 } 772 skb_reserve(skb_frag, ieee->tx_headroom); 773 774 if (encrypt){ 775 if (ieee->hwsec_active) 776 tcb_desc->bHwSec = 1; 777 else 778 tcb_desc->bHwSec = 0; 779 skb_reserve(skb_frag, crypt->ops->extra_prefix_len); 780 } 781 else 782 { 783 tcb_desc->bHwSec = 0; 784 } 785 frag_hdr = (struct ieee80211_hdr_3addrqos *)skb_put(skb_frag, hdr_len); 786 memcpy(frag_hdr, &header, hdr_len); 787 788 /* If this is not the last fragment, then add the MOREFRAGS 789 * bit to the frame control */ 790 if (i != nr_frags - 1) { 791 frag_hdr->frame_ctl = cpu_to_le16( 792 fc | IEEE80211_FCTL_MOREFRAGS); 793 bytes = bytes_per_frag; 794 795 } else { 796 /* The last fragment takes the remaining length */ 797 bytes = bytes_last_frag; 798 } 799 //if(ieee->current_network.QoS_Enable) 800 if(qos_actived) 801 { 802 // add 1 only indicate to corresponding seq number control 2006/7/12 803 frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[UP2AC(skb->priority)+1]<<4 | i); 804 } else { 805 frag_hdr->seq_ctl = cpu_to_le16(ieee->seq_ctrl[0]<<4 | i); 806 } 807 808 /* Put a SNAP header on the first fragment */ 809 if (i == 0) { 810 ieee80211_put_snap( 811 skb_put(skb_frag, SNAP_SIZE + sizeof(u16)), 812 ether_type); 813 bytes -= SNAP_SIZE + sizeof(u16); 814 } 815 816 memcpy(skb_put(skb_frag, bytes), skb->data, bytes); 817 818 /* Advance the SKB... */ 819 skb_pull(skb, bytes); 820 821 /* Encryption routine will move the header forward in order 822 * to insert the IV between the header and the payload */ 823 if (encrypt) 824 ieee80211_encrypt_fragment(ieee, skb_frag, hdr_len); 825 if (ieee->config & 826 (CFG_IEEE80211_COMPUTE_FCS | CFG_IEEE80211_RESERVE_FCS)) 827 skb_put(skb_frag, 4); 828 } 829 830 if(qos_actived) 831 { 832 if (ieee->seq_ctrl[UP2AC(skb->priority) + 1] == 0xFFF) 833 ieee->seq_ctrl[UP2AC(skb->priority) + 1] = 0; 834 else 835 ieee->seq_ctrl[UP2AC(skb->priority) + 1]++; 836 } else { 837 if (ieee->seq_ctrl[0] == 0xFFF) 838 ieee->seq_ctrl[0] = 0; 839 else 840 ieee->seq_ctrl[0]++; 841 } 842 }else{ 843 if (unlikely(skb->len < sizeof(struct ieee80211_hdr_3addr))) { 844 printk(KERN_WARNING "%s: skb too small (%d).\n", 845 ieee->dev->name, skb->len); 846 goto success; 847 } 848 849 txb = ieee80211_alloc_txb(1, skb->len, GFP_ATOMIC); 850 if(!txb){ 851 printk(KERN_WARNING "%s: Could not allocate TXB\n", 852 ieee->dev->name); 853 goto failed; 854 } 855 856 txb->encrypted = 0; 857 txb->payload_size = skb->len; 858 memcpy(skb_put(txb->fragments[0],skb->len), skb->data, skb->len); 859 } 860 861 success: 862//WB add to fill data tcb_desc here. only first fragment is considered, need to change, and you may remove to other place. 863 if (txb) 864 { 865 cb_desc *tcb_desc = (cb_desc *)(txb->fragments[0]->cb + MAX_DEV_ADDR_SIZE); 866 tcb_desc->bTxEnableFwCalcDur = 1; 867 if (is_multicast_ether_addr(header.addr1)) 868 tcb_desc->bMulticast = 1; 869 if (is_broadcast_ether_addr(header.addr1)) 870 tcb_desc->bBroadcast = 1; 871 ieee80211_txrate_selectmode(ieee, tcb_desc); 872 if ( tcb_desc->bMulticast || tcb_desc->bBroadcast) 873 tcb_desc->data_rate = ieee->basic_rate; 874 else 875 //tcb_desc->data_rate = CURRENT_RATE(ieee->current_network.mode, ieee->rate, ieee->HTCurrentOperaRate); 876 tcb_desc->data_rate = CURRENT_RATE(ieee->mode, ieee->rate, ieee->HTCurrentOperaRate); 877 ieee80211_qurey_ShortPreambleMode(ieee, tcb_desc); 878 ieee80211_tx_query_agg_cap(ieee, txb->fragments[0], tcb_desc); 879 ieee80211_query_HTCapShortGI(ieee, tcb_desc); 880 ieee80211_query_BandwidthMode(ieee, tcb_desc); 881 ieee80211_query_protectionmode(ieee, tcb_desc, txb->fragments[0]); 882 ieee80211_query_seqnum(ieee, txb->fragments[0], header.addr1); 883// IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, txb->fragments[0]->data, txb->fragments[0]->len); 884 //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, tcb_desc, sizeof(cb_desc)); 885 } 886 spin_unlock_irqrestore(&ieee->lock, flags); 887 dev_kfree_skb_any(skb); 888 if (txb) { 889 if (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE){ 890 ieee80211_softmac_xmit(txb, ieee); 891 }else{ 892 if ((*ieee->hard_start_xmit)(txb, dev) == 0) { 893 stats->tx_packets++; 894 stats->tx_bytes += txb->payload_size; 895 return 0; 896 } 897 ieee80211_txb_free(txb); 898 } 899 } 900 901 return 0; 902 903 failed: 904 spin_unlock_irqrestore(&ieee->lock, flags); 905 netif_stop_queue(dev); 906 stats->tx_errors++; 907 return 1; 908 909} 910 911EXPORT_SYMBOL(ieee80211_txb_free); 912