1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Original code based Host AP (software wireless LAN access point) driver 4 * for Intersil Prism2/2.5/3 - hostap.o module, common routines 5 * 6 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen 7 * <jkmaline@cc.hut.fi> 8 * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi> 9 * Copyright (c) 2004, Intel Corporation 10 * 11 * Few modifications for Realtek's Wi-Fi drivers by 12 * Andrea Merello <andrea.merello@gmail.com> 13 * 14 * A special thanks goes to Realtek for their support ! 15 */ 16 #include <linux/compiler.h> 17 #include <linux/errno.h> 18 #include <linux/if_arp.h> 19 #include <linux/in6.h> 20 #include <linux/in.h> 21 #include <linux/ip.h> 22 #include <linux/kernel.h> 23 #include <linux/module.h> 24 #include <linux/netdevice.h> 25 #include <linux/pci.h> 26 #include <linux/proc_fs.h> 27 #include <linux/skbuff.h> 28 #include <linux/slab.h> 29 #include <linux/tcp.h> 30 #include <linux/types.h> 31 #include <linux/wireless.h> 32 #include <linux/etherdevice.h> 33 #include <linux/uaccess.h> 34 #include <linux/ctype.h> 35 36 #include "rtllib.h" 37 38 static void rtllib_rx_mgt(struct rtllib_device *ieee, struct sk_buff *skb, 39 struct rtllib_rx_stats *stats); 40 41 static inline void rtllib_monitor_rx(struct rtllib_device *ieee, 42 struct sk_buff *skb, 43 struct rtllib_rx_stats *rx_status, 44 size_t hdr_length) 45 { 46 skb->dev = ieee->dev; 47 skb_reset_mac_header(skb); 48 skb_pull(skb, hdr_length); 49 skb->pkt_type = PACKET_OTHERHOST; 50 skb->protocol = htons(ETH_P_80211_RAW); 51 memset(skb->cb, 0, sizeof(skb->cb)); 52 netif_rx(skb); 53 } 54 55 /* Called only as a tasklet (software IRQ) */ 56 static struct rtllib_frag_entry * 57 rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq, 58 unsigned int frag, u8 tid, u8 *src, u8 *dst) 59 { 60 struct rtllib_frag_entry *entry; 61 int i; 62 63 for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) { 64 entry = &ieee->frag_cache[tid][i]; 65 if (entry->skb && 66 time_after(jiffies, entry->first_frag_time + 2 * HZ)) { 67 netdev_dbg(ieee->dev, 68 "expiring fragment cache entry seq=%u last_frag=%u\n", 69 entry->seq, entry->last_frag); 70 dev_kfree_skb_any(entry->skb); 71 entry->skb = NULL; 72 } 73 74 if (entry->skb && entry->seq == seq && 75 (entry->last_frag + 1 == frag || frag == -1) && 76 memcmp(entry->src_addr, src, ETH_ALEN) == 0 && 77 memcmp(entry->dst_addr, dst, ETH_ALEN) == 0) 78 return entry; 79 } 80 81 return NULL; 82 } 83 84 /* Called only as a tasklet (software IRQ) */ 85 static struct sk_buff * 86 rtllib_frag_cache_get(struct rtllib_device *ieee, 87 struct ieee80211_hdr *hdr) 88 { 89 struct sk_buff *skb = NULL; 90 u16 fc = le16_to_cpu(hdr->frame_control); 91 u16 sc = le16_to_cpu(hdr->seq_ctrl); 92 unsigned int frag = WLAN_GET_SEQ_FRAG(sc); 93 unsigned int seq = WLAN_GET_SEQ_SEQ(sc); 94 struct rtllib_frag_entry *entry; 95 struct ieee80211_qos_hdr *hdr_3addrqos; 96 struct ieee80211_qos_hdr_4addr *hdr_4addrqos; 97 u8 tid; 98 99 if (ieee80211_has_a4(hdr->frame_control) && 100 RTLLIB_QOS_HAS_SEQ(fc)) { 101 hdr_4addrqos = (struct ieee80211_qos_hdr_4addr *)hdr; 102 tid = le16_to_cpu(hdr_4addrqos->qos_ctrl) & RTLLIB_QCTL_TID; 103 tid = UP2AC(tid); 104 tid++; 105 } else if (RTLLIB_QOS_HAS_SEQ(fc)) { 106 hdr_3addrqos = (struct ieee80211_qos_hdr *)hdr; 107 tid = le16_to_cpu(hdr_3addrqos->qos_ctrl) & RTLLIB_QCTL_TID; 108 tid = UP2AC(tid); 109 tid++; 110 } else { 111 tid = 0; 112 } 113 114 if (frag == 0) { 115 /* Reserve enough space to fit maximum frame length */ 116 skb = dev_alloc_skb(ieee->dev->mtu + 117 sizeof(struct ieee80211_hdr) + 118 8 /* LLC */ + 119 2 /* alignment */ + 120 8 /* WEP */ + 121 ETH_ALEN /* WDS */ + 122 /* QOS Control */ 123 (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0)); 124 if (!skb) 125 return NULL; 126 127 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]]; 128 ieee->frag_next_idx[tid]++; 129 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN) 130 ieee->frag_next_idx[tid] = 0; 131 132 if (entry->skb) 133 dev_kfree_skb_any(entry->skb); 134 135 entry->first_frag_time = jiffies; 136 entry->seq = seq; 137 entry->last_frag = frag; 138 entry->skb = skb; 139 ether_addr_copy(entry->src_addr, hdr->addr2); 140 ether_addr_copy(entry->dst_addr, hdr->addr1); 141 } else { 142 /* received a fragment of a frame for which the head fragment 143 * should have already been received 144 */ 145 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2, 146 hdr->addr1); 147 if (entry) { 148 entry->last_frag = frag; 149 skb = entry->skb; 150 } 151 } 152 153 return skb; 154 } 155 156 /* Called only as a tasklet (software IRQ) */ 157 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee, 158 struct ieee80211_hdr *hdr) 159 { 160 u16 fc = le16_to_cpu(hdr->frame_control); 161 u16 sc = le16_to_cpu(hdr->seq_ctrl); 162 unsigned int seq = WLAN_GET_SEQ_SEQ(sc); 163 struct rtllib_frag_entry *entry; 164 struct ieee80211_qos_hdr *hdr_3addrqos; 165 struct ieee80211_qos_hdr_4addr *hdr_4addrqos; 166 u8 tid; 167 168 if (ieee80211_has_a4(hdr->frame_control) && 169 RTLLIB_QOS_HAS_SEQ(fc)) { 170 hdr_4addrqos = (struct ieee80211_qos_hdr_4addr *)hdr; 171 tid = le16_to_cpu(hdr_4addrqos->qos_ctrl) & RTLLIB_QCTL_TID; 172 tid = UP2AC(tid); 173 tid++; 174 } else if (RTLLIB_QOS_HAS_SEQ(fc)) { 175 hdr_3addrqos = (struct ieee80211_qos_hdr *)hdr; 176 tid = le16_to_cpu(hdr_3addrqos->qos_ctrl) & RTLLIB_QCTL_TID; 177 tid = UP2AC(tid); 178 tid++; 179 } else { 180 tid = 0; 181 } 182 183 entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2, 184 hdr->addr1); 185 186 if (!entry) { 187 netdev_dbg(ieee->dev, 188 "Couldn't invalidate fragment cache entry (seq=%u)\n", 189 seq); 190 return -1; 191 } 192 193 entry->skb = NULL; 194 return 0; 195 } 196 197 /* rtllib_rx_frame_mgtmt 198 * 199 * Responsible for handling management control frames 200 * 201 * Called by rtllib_rx 202 */ 203 static inline int 204 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb, 205 struct rtllib_rx_stats *rx_stats, u16 type, 206 u16 stype) 207 { 208 /* On the struct stats definition there is written that 209 * this is not mandatory.... but seems that the probe 210 * response parser uses it 211 */ 212 struct ieee80211_hdr_3addr *hdr = (struct ieee80211_hdr_3addr *)skb->data; 213 214 rx_stats->len = skb->len; 215 rtllib_rx_mgt(ieee, skb, rx_stats); 216 if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) { 217 dev_kfree_skb_any(skb); 218 return 0; 219 } 220 rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype); 221 222 dev_kfree_skb_any(skb); 223 224 return 0; 225 } 226 227 /* No encapsulation header if EtherType < 0x600 (=length) */ 228 229 /* Called by rtllib_rx_frame_decrypt */ 230 static int rtllib_is_eapol_frame(struct rtllib_device *ieee, 231 struct sk_buff *skb, size_t hdrlen) 232 { 233 struct net_device *dev = ieee->dev; 234 u16 fc, ethertype; 235 struct ieee80211_hdr *hdr; 236 u8 *pos; 237 238 if (skb->len < 24) 239 return 0; 240 241 hdr = (struct ieee80211_hdr *)skb->data; 242 fc = le16_to_cpu(hdr->frame_control); 243 244 /* check that the frame is unicast frame to us */ 245 if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == 246 IEEE80211_FCTL_TODS && 247 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 && 248 memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) { 249 /* ToDS frame with own addr BSSID and DA */ 250 } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == 251 IEEE80211_FCTL_FROMDS && 252 memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) { 253 /* FromDS frame with own addr as DA */ 254 } else { 255 return 0; 256 } 257 258 if (skb->len < 24 + 8) 259 return 0; 260 261 /* check for port access entity Ethernet type */ 262 pos = skb->data + hdrlen; 263 ethertype = (pos[6] << 8) | pos[7]; 264 if (ethertype == ETH_P_PAE) 265 return 1; 266 267 return 0; 268 } 269 270 /* Called only as a tasklet (software IRQ), by rtllib_rx */ 271 static inline int 272 rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb, 273 struct lib80211_crypt_data *crypt) 274 { 275 struct ieee80211_hdr *hdr; 276 int res, hdrlen; 277 278 if (!crypt || !crypt->ops->decrypt_mpdu) 279 return 0; 280 281 if (ieee->hwsec_active) { 282 struct cb_desc *tcb_desc = (struct cb_desc *) 283 (skb->cb + MAX_DEV_ADDR_SIZE); 284 285 tcb_desc->bHwSec = 1; 286 287 if (ieee->need_sw_enc) 288 tcb_desc->bHwSec = 0; 289 } 290 291 hdr = (struct ieee80211_hdr *)skb->data; 292 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_control)); 293 294 atomic_inc(&crypt->refcnt); 295 res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv); 296 atomic_dec(&crypt->refcnt); 297 if (res < 0) { 298 netdev_dbg(ieee->dev, "decryption failed (SA= %pM) res=%d\n", 299 hdr->addr2, res); 300 if (res == -2) 301 netdev_dbg(ieee->dev, 302 "Decryption failed ICV mismatch (key %d)\n", 303 skb->data[hdrlen + 3] >> 6); 304 return -1; 305 } 306 307 return res; 308 } 309 310 /* Called only as a tasklet (software IRQ), by rtllib_rx */ 311 static inline int 312 rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb, 313 int keyidx, struct lib80211_crypt_data *crypt) 314 { 315 struct ieee80211_hdr *hdr; 316 int res, hdrlen; 317 318 if (!crypt || !crypt->ops->decrypt_msdu) 319 return 0; 320 if (ieee->hwsec_active) { 321 struct cb_desc *tcb_desc = (struct cb_desc *) 322 (skb->cb + MAX_DEV_ADDR_SIZE); 323 324 tcb_desc->bHwSec = 1; 325 326 if (ieee->need_sw_enc) 327 tcb_desc->bHwSec = 0; 328 } 329 330 hdr = (struct ieee80211_hdr *)skb->data; 331 hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_control)); 332 333 atomic_inc(&crypt->refcnt); 334 res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv); 335 atomic_dec(&crypt->refcnt); 336 if (res < 0) { 337 netdev_dbg(ieee->dev, 338 "MSDU decryption/MIC verification failed (SA= %pM keyidx=%d)\n", 339 hdr->addr2, keyidx); 340 return -1; 341 } 342 343 return 0; 344 } 345 346 /* this function is stolen from ipw2200 driver*/ 347 #define IEEE_PACKET_RETRY_TIME (5 * HZ) 348 static int is_duplicate_packet(struct rtllib_device *ieee, 349 struct ieee80211_hdr *header) 350 { 351 u16 fc = le16_to_cpu(header->frame_control); 352 u16 sc = le16_to_cpu(header->seq_ctrl); 353 u16 seq = WLAN_GET_SEQ_SEQ(sc); 354 u16 frag = WLAN_GET_SEQ_FRAG(sc); 355 u16 *last_seq, *last_frag; 356 unsigned long *last_time; 357 struct ieee80211_qos_hdr *hdr_3addrqos; 358 struct ieee80211_qos_hdr_4addr *hdr_4addrqos; 359 u8 tid; 360 361 if (ieee80211_has_a4(header->frame_control) && 362 RTLLIB_QOS_HAS_SEQ(fc)) { 363 hdr_4addrqos = (struct ieee80211_qos_hdr_4addr *)header; 364 tid = le16_to_cpu(hdr_4addrqos->qos_ctrl) & RTLLIB_QCTL_TID; 365 tid = UP2AC(tid); 366 tid++; 367 } else if (RTLLIB_QOS_HAS_SEQ(fc)) { 368 hdr_3addrqos = (struct ieee80211_qos_hdr *)header; 369 tid = le16_to_cpu(hdr_3addrqos->qos_ctrl) & RTLLIB_QCTL_TID; 370 tid = UP2AC(tid); 371 tid++; 372 } else { 373 tid = 0; 374 } 375 376 switch (ieee->iw_mode) { 377 case IW_MODE_INFRA: 378 last_seq = &ieee->last_rxseq_num[tid]; 379 last_frag = &ieee->last_rxfrag_num[tid]; 380 last_time = &ieee->last_packet_time[tid]; 381 break; 382 default: 383 return 0; 384 } 385 386 if ((*last_seq == seq) && 387 time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) { 388 if (*last_frag == frag) 389 goto drop; 390 if (*last_frag + 1 != frag) 391 /* out-of-order fragment */ 392 goto drop; 393 } else { 394 *last_seq = seq; 395 } 396 397 *last_frag = frag; 398 *last_time = jiffies; 399 return 0; 400 401 drop: 402 403 return 1; 404 } 405 406 static bool AddReorderEntry(struct rx_ts_record *ts, 407 struct rx_reorder_entry *pReorderEntry) 408 { 409 struct list_head *pList = &ts->rx_pending_pkt_list; 410 411 while (pList->next != &ts->rx_pending_pkt_list) { 412 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *) 413 list_entry(pList->next, struct rx_reorder_entry, 414 list))->SeqNum)) 415 pList = pList->next; 416 else if (SN_EQUAL(pReorderEntry->SeqNum, 417 ((struct rx_reorder_entry *)list_entry(pList->next, 418 struct rx_reorder_entry, list))->SeqNum)) 419 return false; 420 else 421 break; 422 } 423 pReorderEntry->list.next = pList->next; 424 pReorderEntry->list.next->prev = &pReorderEntry->list; 425 pReorderEntry->list.prev = pList; 426 pList->next = &pReorderEntry->list; 427 428 return true; 429 } 430 431 void rtllib_indicate_packets(struct rtllib_device *ieee, 432 struct rtllib_rxb **prxbIndicateArray, u8 index) 433 { 434 struct net_device_stats *stats = &ieee->stats; 435 u8 i = 0, j = 0; 436 u16 ethertype; 437 438 for (j = 0; j < index; j++) { 439 struct rtllib_rxb *prxb = prxbIndicateArray[j]; 440 441 for (i = 0; i < prxb->nr_subframes; i++) { 442 struct sk_buff *sub_skb = prxb->subframes[i]; 443 444 /* convert hdr + possible LLC headers into Ethernet header */ 445 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; 446 if (sub_skb->len >= 8 && 447 ((memcmp(sub_skb->data, rfc1042_header, 448 SNAP_SIZE) == 0 && 449 ethertype != ETH_P_AARP && 450 ethertype != ETH_P_IPX) || 451 memcmp(sub_skb->data, bridge_tunnel_header, 452 SNAP_SIZE) == 0)) { 453 /* remove RFC1042 or Bridge-Tunnel encapsulation 454 * and replace EtherType 455 */ 456 skb_pull(sub_skb, SNAP_SIZE); 457 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN); 458 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN); 459 } else { 460 u16 len; 461 /* Leave Ethernet header part of hdr and full payload */ 462 len = sub_skb->len; 463 memcpy(skb_push(sub_skb, 2), &len, 2); 464 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN); 465 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN); 466 } 467 468 /* Indicate the packets to upper layer */ 469 if (sub_skb) { 470 stats->rx_packets++; 471 stats->rx_bytes += sub_skb->len; 472 473 memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); 474 sub_skb->protocol = eth_type_trans(sub_skb, 475 ieee->dev); 476 sub_skb->dev = ieee->dev; 477 sub_skb->dev->stats.rx_packets++; 478 sub_skb->dev->stats.rx_bytes += sub_skb->len; 479 /* 802.11 crc not sufficient */ 480 sub_skb->ip_summed = CHECKSUM_NONE; 481 ieee->last_rx_ps_time = jiffies; 482 netif_rx(sub_skb); 483 } 484 } 485 kfree(prxb); 486 prxb = NULL; 487 } 488 } 489 490 void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee, 491 struct rx_ts_record *ts) 492 { 493 struct rx_reorder_entry *pRxReorderEntry; 494 u8 RfdCnt = 0; 495 496 del_timer_sync(&ts->rx_pkt_pending_timer); 497 while (!list_empty(&ts->rx_pending_pkt_list)) { 498 if (RfdCnt >= REORDER_WIN_SIZE) { 499 netdev_info(ieee->dev, 500 "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n", 501 __func__); 502 break; 503 } 504 505 pRxReorderEntry = (struct rx_reorder_entry *) 506 list_entry(ts->rx_pending_pkt_list.prev, 507 struct rx_reorder_entry, list); 508 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n", __func__, 509 pRxReorderEntry->SeqNum); 510 list_del_init(&pRxReorderEntry->list); 511 512 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb; 513 514 RfdCnt = RfdCnt + 1; 515 list_add_tail(&pRxReorderEntry->list, 516 &ieee->RxReorder_Unused_List); 517 } 518 rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt); 519 520 ts->rx_indicate_seq = 0xffff; 521 } 522 523 static void RxReorderIndicatePacket(struct rtllib_device *ieee, 524 struct rtllib_rxb *prxb, 525 struct rx_ts_record *ts, u16 SeqNum) 526 { 527 struct rt_hi_throughput *ht_info = ieee->ht_info; 528 struct rx_reorder_entry *pReorderEntry = NULL; 529 u8 WinSize = ht_info->rx_reorder_win_size; 530 u16 WinEnd = 0; 531 u8 index = 0; 532 bool bMatchWinStart = false, bPktInBuf = false; 533 unsigned long flags; 534 535 netdev_dbg(ieee->dev, 536 "%s(): Seq is %d, ts->rx_indicate_seq is %d, WinSize is %d\n", 537 __func__, SeqNum, ts->rx_indicate_seq, WinSize); 538 539 spin_lock_irqsave(&(ieee->reorder_spinlock), flags); 540 541 WinEnd = (ts->rx_indicate_seq + WinSize - 1) % 4096; 542 /* Rx Reorder initialize condition.*/ 543 if (ts->rx_indicate_seq == 0xffff) 544 ts->rx_indicate_seq = SeqNum; 545 546 /* Drop out the packet which SeqNum is smaller than WinStart */ 547 if (SN_LESS(SeqNum, ts->rx_indicate_seq)) { 548 netdev_dbg(ieee->dev, 549 "Packet Drop! IndicateSeq: %d, NewSeq: %d\n", 550 ts->rx_indicate_seq, SeqNum); 551 ht_info->rx_reorder_drop_counter++; 552 { 553 int i; 554 555 for (i = 0; i < prxb->nr_subframes; i++) 556 dev_kfree_skb(prxb->subframes[i]); 557 kfree(prxb); 558 prxb = NULL; 559 } 560 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags); 561 return; 562 } 563 564 /* Sliding window manipulation. Conditions includes: 565 * 1. Incoming SeqNum is equal to WinStart =>Window shift 1 566 * 2. Incoming SeqNum is larger than the WinEnd => Window shift N 567 */ 568 if (SN_EQUAL(SeqNum, ts->rx_indicate_seq)) { 569 ts->rx_indicate_seq = (ts->rx_indicate_seq + 1) % 4096; 570 bMatchWinStart = true; 571 } else if (SN_LESS(WinEnd, SeqNum)) { 572 if (SeqNum >= (WinSize - 1)) 573 ts->rx_indicate_seq = SeqNum + 1 - WinSize; 574 else 575 ts->rx_indicate_seq = 4095 - 576 (WinSize - (SeqNum + 1)) + 1; 577 netdev_dbg(ieee->dev, 578 "Window Shift! IndicateSeq: %d, NewSeq: %d\n", 579 ts->rx_indicate_seq, SeqNum); 580 } 581 582 /* Indication process. 583 * After Packet dropping and Sliding Window shifting as above, we can 584 * now just indicate the packets with the SeqNum smaller than latest 585 * WinStart and struct buffer other packets. 586 * 587 * For Rx Reorder condition: 588 * 1. All packets with SeqNum smaller than WinStart => Indicate 589 * 2. All packets with SeqNum larger than or equal to 590 * WinStart => Buffer it. 591 */ 592 if (bMatchWinStart) { 593 /* Current packet is going to be indicated.*/ 594 netdev_dbg(ieee->dev, 595 "Packets indication! IndicateSeq: %d, NewSeq: %d\n", 596 ts->rx_indicate_seq, SeqNum); 597 ieee->prxbIndicateArray[0] = prxb; 598 index = 1; 599 } else { 600 /* Current packet is going to be inserted into pending list.*/ 601 if (!list_empty(&ieee->RxReorder_Unused_List)) { 602 pReorderEntry = (struct rx_reorder_entry *) 603 list_entry(ieee->RxReorder_Unused_List.next, 604 struct rx_reorder_entry, list); 605 list_del_init(&pReorderEntry->list); 606 607 /* Make a reorder entry and insert 608 * into a the packet list. 609 */ 610 pReorderEntry->SeqNum = SeqNum; 611 pReorderEntry->prxb = prxb; 612 613 if (!AddReorderEntry(ts, pReorderEntry)) { 614 int i; 615 616 netdev_dbg(ieee->dev, 617 "%s(): Duplicate packet is dropped. IndicateSeq: %d, NewSeq: %d\n", 618 __func__, ts->rx_indicate_seq, 619 SeqNum); 620 list_add_tail(&pReorderEntry->list, 621 &ieee->RxReorder_Unused_List); 622 623 for (i = 0; i < prxb->nr_subframes; i++) 624 dev_kfree_skb(prxb->subframes[i]); 625 kfree(prxb); 626 prxb = NULL; 627 } else { 628 netdev_dbg(ieee->dev, 629 "Pkt insert into struct buffer. IndicateSeq: %d, NewSeq: %d\n", 630 ts->rx_indicate_seq, SeqNum); 631 } 632 } else { 633 /* Packets are dropped if there are not enough reorder 634 * entries. This part should be modified!! We can just 635 * indicate all the packets in struct buffer and get 636 * reorder entries. 637 */ 638 netdev_err(ieee->dev, 639 "%s(): There is no reorder entry! Packet is dropped!\n", 640 __func__); 641 { 642 int i; 643 644 for (i = 0; i < prxb->nr_subframes; i++) 645 dev_kfree_skb(prxb->subframes[i]); 646 kfree(prxb); 647 prxb = NULL; 648 } 649 } 650 } 651 652 /* Check if there is any packet need indicate.*/ 653 while (!list_empty(&ts->rx_pending_pkt_list)) { 654 netdev_dbg(ieee->dev, "%s(): start RREORDER indicate\n", 655 __func__); 656 657 pReorderEntry = (struct rx_reorder_entry *) 658 list_entry(ts->rx_pending_pkt_list.prev, 659 struct rx_reorder_entry, 660 list); 661 if (SN_LESS(pReorderEntry->SeqNum, ts->rx_indicate_seq) || 662 SN_EQUAL(pReorderEntry->SeqNum, ts->rx_indicate_seq)) { 663 /* This protect struct buffer from overflow. */ 664 if (index >= REORDER_WIN_SIZE) { 665 netdev_err(ieee->dev, 666 "%s(): Buffer overflow!\n", 667 __func__); 668 bPktInBuf = true; 669 break; 670 } 671 672 list_del_init(&pReorderEntry->list); 673 674 if (SN_EQUAL(pReorderEntry->SeqNum, ts->rx_indicate_seq)) 675 ts->rx_indicate_seq = (ts->rx_indicate_seq + 1) % 676 4096; 677 678 ieee->prxbIndicateArray[index] = pReorderEntry->prxb; 679 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n", 680 __func__, pReorderEntry->SeqNum); 681 index++; 682 683 list_add_tail(&pReorderEntry->list, 684 &ieee->RxReorder_Unused_List); 685 } else { 686 bPktInBuf = true; 687 break; 688 } 689 } 690 691 /* Handling pending timer. Set this timer to prevent from long time 692 * Rx buffering. 693 */ 694 if (index > 0) { 695 spin_unlock_irqrestore(&ieee->reorder_spinlock, flags); 696 if (timer_pending(&ts->rx_pkt_pending_timer)) 697 del_timer_sync(&ts->rx_pkt_pending_timer); 698 spin_lock_irqsave(&ieee->reorder_spinlock, flags); 699 ts->rx_timeout_indicate_seq = 0xffff; 700 701 if (index > REORDER_WIN_SIZE) { 702 netdev_err(ieee->dev, 703 "%s(): Rx Reorder struct buffer full!\n", 704 __func__); 705 spin_unlock_irqrestore(&(ieee->reorder_spinlock), 706 flags); 707 return; 708 } 709 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index); 710 bPktInBuf = false; 711 } 712 713 if (bPktInBuf && ts->rx_timeout_indicate_seq == 0xffff) { 714 netdev_dbg(ieee->dev, "%s(): SET rx timeout timer\n", __func__); 715 ts->rx_timeout_indicate_seq = ts->rx_indicate_seq; 716 spin_unlock_irqrestore(&ieee->reorder_spinlock, flags); 717 mod_timer(&ts->rx_pkt_pending_timer, jiffies + 718 msecs_to_jiffies(ht_info->rx_reorder_pending_time)); 719 spin_lock_irqsave(&ieee->reorder_spinlock, flags); 720 } 721 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags); 722 } 723 724 static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb, 725 struct rtllib_rx_stats *rx_stats, 726 struct rtllib_rxb *rxb, u8 *src, u8 *dst) 727 { 728 struct ieee80211_hdr_3addr *hdr = (struct ieee80211_hdr_3addr *)skb->data; 729 u16 fc = le16_to_cpu(hdr->frame_control); 730 731 u16 LLCOffset = sizeof(struct ieee80211_hdr_3addr); 732 u16 ChkLength; 733 bool is_aggregate_frame = false; 734 u16 nSubframe_Length; 735 u8 nPadding_Length = 0; 736 u16 SeqNum = 0; 737 struct sk_buff *sub_skb; 738 /* just for debug purpose */ 739 SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctrl)); 740 if ((RTLLIB_QOS_HAS_SEQ(fc)) && 741 (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved)) 742 is_aggregate_frame = true; 743 744 if (RTLLIB_QOS_HAS_SEQ(fc)) 745 LLCOffset += 2; 746 if (rx_stats->bContainHTC) 747 LLCOffset += sHTCLng; 748 749 ChkLength = LLCOffset; 750 751 if (skb->len <= ChkLength) 752 return 0; 753 754 skb_pull(skb, LLCOffset); 755 ieee->is_aggregate_frame = is_aggregate_frame; 756 if (!is_aggregate_frame) { 757 rxb->nr_subframes = 1; 758 759 /* altered by clark 3/30/2010 760 * The struct buffer size of the skb indicated to upper layer 761 * must be less than 5000, or the defraged IP datagram 762 * in the IP layer will exceed "ipfrag_high_tresh" and be 763 * discarded. so there must not use the function 764 * "skb_copy" and "skb_clone" for "skb". 765 */ 766 767 /* Allocate new skb for releasing to upper layer */ 768 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE); 769 if (!sub_skb) 770 return 0; 771 skb_reserve(sub_skb, 12); 772 skb_put_data(sub_skb, skb->data, skb->len); 773 sub_skb->dev = ieee->dev; 774 775 rxb->subframes[0] = sub_skb; 776 777 memcpy(rxb->src, src, ETH_ALEN); 778 memcpy(rxb->dst, dst, ETH_ALEN); 779 rxb->subframes[0]->dev = ieee->dev; 780 return 1; 781 } 782 783 rxb->nr_subframes = 0; 784 memcpy(rxb->src, src, ETH_ALEN); 785 memcpy(rxb->dst, dst, ETH_ALEN); 786 while (skb->len > ETHERNET_HEADER_SIZE) { 787 /* Offset 12 denote 2 mac address */ 788 nSubframe_Length = *((u16 *)(skb->data + 12)); 789 nSubframe_Length = (nSubframe_Length >> 8) + 790 (nSubframe_Length << 8); 791 792 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) { 793 netdev_info(ieee->dev, 794 "%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n", 795 __func__, rxb->nr_subframes); 796 netdev_info(ieee->dev, 797 "%s: A-MSDU parse error!! Subframe Length: %d\n", 798 __func__, nSubframe_Length); 799 netdev_info(ieee->dev, 800 "nRemain_Length is %d and nSubframe_Length is : %d\n", 801 skb->len, nSubframe_Length); 802 netdev_info(ieee->dev, 803 "The Packet SeqNum is %d\n", 804 SeqNum); 805 return 0; 806 } 807 808 /* move the data point to data content */ 809 skb_pull(skb, ETHERNET_HEADER_SIZE); 810 811 /* altered by clark 3/30/2010 812 * The struct buffer size of the skb indicated to upper layer 813 * must be less than 5000, or the defraged IP datagram 814 * in the IP layer will exceed "ipfrag_high_tresh" and be 815 * discarded. so there must not use the function 816 * "skb_copy" and "skb_clone" for "skb". 817 */ 818 819 /* Allocate new skb for releasing to upper layer */ 820 sub_skb = dev_alloc_skb(nSubframe_Length + 12); 821 if (!sub_skb) 822 return 0; 823 skb_reserve(sub_skb, 12); 824 skb_put_data(sub_skb, skb->data, nSubframe_Length); 825 826 sub_skb->dev = ieee->dev; 827 rxb->subframes[rxb->nr_subframes++] = sub_skb; 828 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) { 829 netdev_dbg(ieee->dev, 830 "ParseSubframe(): Too many Subframes! Packets dropped!\n"); 831 break; 832 } 833 skb_pull(skb, nSubframe_Length); 834 835 if (skb->len != 0) { 836 nPadding_Length = 4 - ((nSubframe_Length + 837 ETHERNET_HEADER_SIZE) % 4); 838 if (nPadding_Length == 4) 839 nPadding_Length = 0; 840 841 if (skb->len < nPadding_Length) 842 return 0; 843 844 skb_pull(skb, nPadding_Length); 845 } 846 } 847 848 return rxb->nr_subframes; 849 } 850 851 static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee, 852 struct sk_buff *skb, 853 struct rtllib_rx_stats *rx_stats) 854 { 855 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 856 u16 fc = le16_to_cpu(hdr->frame_control); 857 size_t hdrlen; 858 859 hdrlen = rtllib_get_hdrlen(fc); 860 if (ht_c_check(ieee, skb->data)) { 861 if (net_ratelimit()) 862 netdev_info(ieee->dev, "%s: find HTCControl!\n", 863 __func__); 864 hdrlen += 4; 865 rx_stats->bContainHTC = true; 866 } 867 868 if (RTLLIB_QOS_HAS_SEQ(fc)) 869 rx_stats->bIsQosData = true; 870 871 return hdrlen; 872 } 873 874 static int rtllib_rx_check_duplicate(struct rtllib_device *ieee, 875 struct sk_buff *skb, u8 multicast) 876 { 877 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 878 u16 fc, sc; 879 u8 frag; 880 881 fc = le16_to_cpu(hdr->frame_control); 882 sc = le16_to_cpu(hdr->seq_ctrl); 883 frag = WLAN_GET_SEQ_FRAG(sc); 884 885 if (!ieee->ht_info->cur_rx_reorder_enable || 886 !ieee->current_network.qos_data.active || 887 !IsDataFrame(skb->data) || 888 IsLegacyDataFrame(skb->data)) { 889 if (!ieee80211_is_beacon(hdr->frame_control)) { 890 if (is_duplicate_packet(ieee, hdr)) 891 return -1; 892 } 893 } else { 894 struct rx_ts_record *ts = NULL; 895 896 if (rtllib_get_ts(ieee, (struct ts_common_info **)&ts, hdr->addr2, 897 (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) { 898 if ((fc & (1 << 11)) && (frag == ts->rx_last_frag_num) && 899 (WLAN_GET_SEQ_SEQ(sc) == ts->rx_last_seq_num)) 900 return -1; 901 ts->rx_last_frag_num = frag; 902 ts->rx_last_seq_num = WLAN_GET_SEQ_SEQ(sc); 903 } else { 904 netdev_warn(ieee->dev, "%s(): No TS! Skip the check!\n", 905 __func__); 906 return -1; 907 } 908 } 909 910 return 0; 911 } 912 913 static void rtllib_rx_extract_addr(struct rtllib_device *ieee, 914 struct ieee80211_hdr *hdr, u8 *dst, 915 u8 *src, u8 *bssid) 916 { 917 u16 fc = le16_to_cpu(hdr->frame_control); 918 919 switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) { 920 case IEEE80211_FCTL_FROMDS: 921 ether_addr_copy(dst, hdr->addr1); 922 ether_addr_copy(src, hdr->addr3); 923 ether_addr_copy(bssid, hdr->addr2); 924 break; 925 case IEEE80211_FCTL_TODS: 926 ether_addr_copy(dst, hdr->addr3); 927 ether_addr_copy(src, hdr->addr2); 928 ether_addr_copy(bssid, hdr->addr1); 929 break; 930 case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS: 931 ether_addr_copy(dst, hdr->addr3); 932 ether_addr_copy(src, hdr->addr4); 933 ether_addr_copy(bssid, ieee->current_network.bssid); 934 break; 935 default: 936 ether_addr_copy(dst, hdr->addr1); 937 ether_addr_copy(src, hdr->addr2); 938 ether_addr_copy(bssid, hdr->addr3); 939 break; 940 } 941 } 942 943 static int rtllib_rx_data_filter(struct rtllib_device *ieee, struct ieee80211_hdr *hdr, 944 u8 *dst, u8 *src, u8 *bssid, u8 *addr2) 945 { 946 u8 type, stype; 947 u16 fc = le16_to_cpu(hdr->frame_control); 948 type = WLAN_FC_GET_TYPE(fc); 949 stype = WLAN_FC_GET_STYPE(fc); 950 951 /* Filter frames from different BSS */ 952 if (ieee80211_has_a4(hdr->frame_control) && 953 !ether_addr_equal(ieee->current_network.bssid, bssid) && 954 !is_zero_ether_addr(ieee->current_network.bssid)) { 955 return -1; 956 } 957 958 /* Nullfunc frames may have PS-bit set, so they must be passed to 959 * hostap_handle_sta_rx() before being dropped here. 960 */ 961 if (stype != IEEE80211_STYPE_DATA && 962 stype != IEEE80211_STYPE_DATA_CFACK && 963 stype != IEEE80211_STYPE_DATA_CFPOLL && 964 stype != IEEE80211_STYPE_DATA_CFACKPOLL && 965 stype != IEEE80211_STYPE_QOS_DATA) { 966 if (stype != IEEE80211_STYPE_NULLFUNC) 967 netdev_dbg(ieee->dev, 968 "RX: dropped data frame with no data (type=0x%02x, subtype=0x%02x)\n", 969 type, stype); 970 return -1; 971 } 972 973 /* packets from our adapter are dropped (echo) */ 974 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN)) 975 return -1; 976 977 /* {broad,multi}cast packets to our BSS go through */ 978 if (is_multicast_ether_addr(dst)) { 979 if (memcmp(bssid, ieee->current_network.bssid, 980 ETH_ALEN)) 981 return -1; 982 } 983 return 0; 984 } 985 986 static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb, 987 struct lib80211_crypt_data **crypt, size_t hdrlen) 988 { 989 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 990 u16 fc = le16_to_cpu(hdr->frame_control); 991 int idx = 0; 992 993 if (skb->len >= hdrlen + 3) 994 idx = skb->data[hdrlen + 3] >> 6; 995 996 *crypt = ieee->crypt_info.crypt[idx]; 997 /* allow NULL decrypt to indicate an station specific override 998 * for default encryption 999 */ 1000 if (*crypt && (!(*crypt)->ops || !(*crypt)->ops->decrypt_mpdu)) 1001 *crypt = NULL; 1002 1003 if (!*crypt && (fc & IEEE80211_FCTL_PROTECTED)) { 1004 /* This seems to be triggered by some (multicast?) 1005 * frames from other than current BSS, so just drop the 1006 * frames silently instead of filling system log with 1007 * these reports. 1008 */ 1009 netdev_dbg(ieee->dev, 1010 "Decryption failed (not set) (SA= %pM)\n", 1011 hdr->addr2); 1012 return -1; 1013 } 1014 1015 return 0; 1016 } 1017 1018 static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb, 1019 struct rtllib_rx_stats *rx_stats, 1020 struct lib80211_crypt_data *crypt, size_t hdrlen) 1021 { 1022 struct ieee80211_hdr *hdr; 1023 int keyidx = 0; 1024 u16 fc, sc; 1025 u8 frag; 1026 1027 hdr = (struct ieee80211_hdr *)skb->data; 1028 fc = le16_to_cpu(hdr->frame_control); 1029 sc = le16_to_cpu(hdr->seq_ctrl); 1030 frag = WLAN_GET_SEQ_FRAG(sc); 1031 1032 if ((!rx_stats->Decrypted)) 1033 ieee->need_sw_enc = 1; 1034 else 1035 ieee->need_sw_enc = 0; 1036 1037 keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt); 1038 if ((fc & IEEE80211_FCTL_PROTECTED) && (keyidx < 0)) { 1039 netdev_info(ieee->dev, "%s: decrypt frame error\n", __func__); 1040 return -1; 1041 } 1042 1043 hdr = (struct ieee80211_hdr *)skb->data; 1044 if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) { 1045 int flen; 1046 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr); 1047 1048 netdev_dbg(ieee->dev, "Rx Fragment received (%u)\n", frag); 1049 1050 if (!frag_skb) { 1051 netdev_dbg(ieee->dev, 1052 "Rx cannot get skb from fragment cache (morefrag=%d seq=%u frag=%u)\n", 1053 (fc & IEEE80211_FCTL_MOREFRAGS) != 0, 1054 WLAN_GET_SEQ_SEQ(sc), frag); 1055 return -1; 1056 } 1057 flen = skb->len; 1058 if (frag != 0) 1059 flen -= hdrlen; 1060 1061 if (frag_skb->tail + flen > frag_skb->end) { 1062 netdev_warn(ieee->dev, 1063 "%s: host decrypted and reassembled frame did not fit skb\n", 1064 __func__); 1065 rtllib_frag_cache_invalidate(ieee, hdr); 1066 return -1; 1067 } 1068 1069 if (frag == 0) { 1070 /* copy first fragment (including full headers) into 1071 * beginning of the fragment cache skb 1072 */ 1073 skb_put_data(frag_skb, skb->data, flen); 1074 } else { 1075 /* append frame payload to the end of the fragment 1076 * cache skb 1077 */ 1078 skb_put_data(frag_skb, skb->data + hdrlen, flen); 1079 } 1080 dev_kfree_skb_any(skb); 1081 skb = NULL; 1082 1083 if (fc & IEEE80211_FCTL_MOREFRAGS) { 1084 /* more fragments expected - leave the skb in fragment 1085 * cache for now; it will be delivered to upper layers 1086 * after all fragments have been received 1087 */ 1088 return -2; 1089 } 1090 1091 /* this was the last fragment and the frame will be 1092 * delivered, so remove skb from fragment cache 1093 */ 1094 skb = frag_skb; 1095 hdr = (struct ieee80211_hdr *)skb->data; 1096 rtllib_frag_cache_invalidate(ieee, hdr); 1097 } 1098 1099 /* skb: hdr + (possible reassembled) full MSDU payload; possibly still 1100 * encrypted/authenticated 1101 */ 1102 if ((fc & IEEE80211_FCTL_PROTECTED) && 1103 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) { 1104 netdev_info(ieee->dev, "%s: ==>decrypt msdu error\n", __func__); 1105 return -1; 1106 } 1107 1108 hdr = (struct ieee80211_hdr *)skb->data; 1109 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) { 1110 if (/*ieee->ieee802_1x &&*/ 1111 rtllib_is_eapol_frame(ieee, skb, hdrlen)) { 1112 /* pass unencrypted EAPOL frames even if encryption is 1113 * configured 1114 */ 1115 struct eapol *eap = (struct eapol *)(skb->data + 1116 24); 1117 netdev_dbg(ieee->dev, 1118 "RX: IEEE 802.1X EAPOL frame: %s\n", 1119 eap_get_type(eap->type)); 1120 } else { 1121 netdev_dbg(ieee->dev, 1122 "encryption configured, but RX frame not encrypted (SA= %pM)\n", 1123 hdr->addr2); 1124 return -1; 1125 } 1126 } 1127 1128 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && 1129 rtllib_is_eapol_frame(ieee, skb, hdrlen)) { 1130 struct eapol *eap = (struct eapol *)(skb->data + 24); 1131 1132 netdev_dbg(ieee->dev, "RX: IEEE 802.1X EAPOL frame: %s\n", 1133 eap_get_type(eap->type)); 1134 } 1135 1136 if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep && 1137 !rtllib_is_eapol_frame(ieee, skb, hdrlen)) { 1138 netdev_dbg(ieee->dev, 1139 "dropped unencrypted RX data frame from %pM (drop_unencrypted=1)\n", 1140 hdr->addr2); 1141 return -1; 1142 } 1143 1144 return 0; 1145 } 1146 1147 static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, 1148 u8 nr_subframes) 1149 { 1150 if (unicast) { 1151 if (ieee->link_state == MAC80211_LINKED) { 1152 if (((ieee->link_detect_info.NumRxUnicastOkInPeriod + 1153 ieee->link_detect_info.num_tx_ok_in_period) > 8) || 1154 (ieee->link_detect_info.NumRxUnicastOkInPeriod > 2)) { 1155 ieee->leisure_ps_leave(ieee->dev); 1156 } 1157 } 1158 } 1159 ieee->last_rx_ps_time = jiffies; 1160 } 1161 1162 static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee, 1163 struct rtllib_rx_stats *rx_stats, 1164 struct rtllib_rxb *rxb, 1165 u8 *dst, 1166 u8 *src) 1167 { 1168 struct net_device *dev = ieee->dev; 1169 u16 ethertype; 1170 int i = 0; 1171 1172 if (!rxb) { 1173 netdev_info(dev, "%s: rxb is NULL!!\n", __func__); 1174 return; 1175 } 1176 1177 for (i = 0; i < rxb->nr_subframes; i++) { 1178 struct sk_buff *sub_skb = rxb->subframes[i]; 1179 1180 if (sub_skb) { 1181 /* convert hdr + possible LLC headers 1182 * into Ethernet header 1183 */ 1184 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; 1185 if (sub_skb->len >= 8 && 1186 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 && 1187 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || 1188 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) { 1189 /* remove RFC1042 or Bridge-Tunnel encapsulation 1190 * and replace EtherType 1191 */ 1192 skb_pull(sub_skb, SNAP_SIZE); 1193 ether_addr_copy(skb_push(sub_skb, ETH_ALEN), 1194 src); 1195 ether_addr_copy(skb_push(sub_skb, ETH_ALEN), 1196 dst); 1197 } else { 1198 u16 len; 1199 /* Leave Ethernet header part of hdr 1200 * and full payload 1201 */ 1202 len = sub_skb->len; 1203 memcpy(skb_push(sub_skb, 2), &len, 2); 1204 ether_addr_copy(skb_push(sub_skb, ETH_ALEN), 1205 src); 1206 ether_addr_copy(skb_push(sub_skb, ETH_ALEN), 1207 dst); 1208 } 1209 1210 ieee->stats.rx_packets++; 1211 ieee->stats.rx_bytes += sub_skb->len; 1212 1213 if (is_multicast_ether_addr(dst)) 1214 ieee->stats.multicast++; 1215 1216 /* Indicate the packets to upper layer */ 1217 memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); 1218 sub_skb->protocol = eth_type_trans(sub_skb, dev); 1219 sub_skb->dev = dev; 1220 sub_skb->dev->stats.rx_packets++; 1221 sub_skb->dev->stats.rx_bytes += sub_skb->len; 1222 /* 802.11 crc not sufficient */ 1223 sub_skb->ip_summed = CHECKSUM_NONE; 1224 netif_rx(sub_skb); 1225 } 1226 } 1227 kfree(rxb); 1228 } 1229 1230 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb, 1231 struct rtllib_rx_stats *rx_stats) 1232 { 1233 struct net_device *dev = ieee->dev; 1234 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1235 struct lib80211_crypt_data *crypt = NULL; 1236 struct rtllib_rxb *rxb = NULL; 1237 struct rx_ts_record *ts = NULL; 1238 u16 fc, sc, SeqNum = 0; 1239 u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0; 1240 u8 dst[ETH_ALEN]; 1241 u8 src[ETH_ALEN]; 1242 u8 bssid[ETH_ALEN] = {0}; 1243 1244 size_t hdrlen = 0; 1245 int ret = 0, i = 0; 1246 1247 fc = le16_to_cpu(hdr->frame_control); 1248 type = WLAN_FC_GET_TYPE(fc); 1249 stype = WLAN_FC_GET_STYPE(fc); 1250 sc = le16_to_cpu(hdr->seq_ctrl); 1251 1252 /*Filter pkt not to me*/ 1253 multicast = is_multicast_ether_addr(hdr->addr1); 1254 unicast = !multicast; 1255 if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) 1256 goto rx_dropped; 1257 1258 /*Filter pkt has too small length */ 1259 hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats); 1260 if (skb->len < hdrlen) { 1261 netdev_info(dev, 1262 "%s():ERR!!! skb->len is smaller than hdrlen\n", 1263 __func__); 1264 goto rx_dropped; 1265 } 1266 1267 /* Filter Duplicate pkt */ 1268 ret = rtllib_rx_check_duplicate(ieee, skb, multicast); 1269 if (ret < 0) 1270 goto rx_dropped; 1271 1272 /* Filter CTRL Frame */ 1273 if (type == RTLLIB_FTYPE_CTL) 1274 goto rx_dropped; 1275 1276 /* Filter MGNT Frame */ 1277 if (type == RTLLIB_FTYPE_MGMT) { 1278 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype)) 1279 goto rx_dropped; 1280 else 1281 goto rx_exit; 1282 } 1283 1284 /* Filter WAPI DATA Frame */ 1285 1286 /* Update statstics for AP roaming */ 1287 ieee->link_detect_info.NumRecvDataInPeriod++; 1288 ieee->link_detect_info.num_rx_ok_in_period++; 1289 1290 /* Data frame - extract src/dst addresses */ 1291 rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid); 1292 1293 /* Filter Data frames */ 1294 ret = rtllib_rx_data_filter(ieee, hdr, dst, src, bssid, hdr->addr2); 1295 if (ret < 0) 1296 goto rx_dropped; 1297 1298 if (skb->len == hdrlen) 1299 goto rx_dropped; 1300 1301 /* Send pspoll based on moredata */ 1302 if ((ieee->iw_mode == IW_MODE_INFRA) && 1303 (ieee->sta_sleep == LPS_IS_SLEEP) && 1304 (ieee->polling)) { 1305 if (WLAN_FC_MORE_DATA(fc)) { 1306 /* more data bit is set, let's request a new frame 1307 * from the AP 1308 */ 1309 rtllib_sta_ps_send_pspoll_frame(ieee); 1310 } else { 1311 ieee->polling = false; 1312 } 1313 } 1314 1315 /* Get crypt if encrypted */ 1316 ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen); 1317 if (ret == -1) 1318 goto rx_dropped; 1319 1320 /* Decrypt data frame (including reassemble) */ 1321 ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen); 1322 if (ret == -1) 1323 goto rx_dropped; 1324 else if (ret == -2) 1325 goto rx_exit; 1326 1327 /* Get TS for Rx Reorder */ 1328 hdr = (struct ieee80211_hdr *)skb->data; 1329 if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data) 1330 && !is_multicast_ether_addr(hdr->addr1)) { 1331 TID = Frame_QoSTID(skb->data); 1332 SeqNum = WLAN_GET_SEQ_SEQ(sc); 1333 rtllib_get_ts(ieee, (struct ts_common_info **)&ts, hdr->addr2, TID, 1334 RX_DIR, true); 1335 if (TID != 0 && TID != 3) 1336 ieee->bis_any_nonbepkts = true; 1337 } 1338 1339 /* Parse rx data frame (For AMSDU) */ 1340 /* skb: hdr + (possible reassembled) full plaintext payload */ 1341 rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC); 1342 if (!rxb) 1343 goto rx_dropped; 1344 1345 /* to parse amsdu packets */ 1346 /* qos data packets & reserved bit is 1 */ 1347 if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) { 1348 /* only to free rxb, and not submit the packets 1349 * to upper layer 1350 */ 1351 for (i = 0; i < rxb->nr_subframes; i++) 1352 dev_kfree_skb(rxb->subframes[i]); 1353 kfree(rxb); 1354 rxb = NULL; 1355 goto rx_dropped; 1356 } 1357 1358 /* Update WAPI PN */ 1359 1360 /* Check if leave LPS */ 1361 if (ieee->is_aggregate_frame) 1362 nr_subframes = rxb->nr_subframes; 1363 else 1364 nr_subframes = 1; 1365 if (unicast) 1366 ieee->link_detect_info.NumRxUnicastOkInPeriod += nr_subframes; 1367 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes); 1368 1369 /* Indicate packets to upper layer or Rx Reorder */ 1370 if (!ieee->ht_info->cur_rx_reorder_enable || !ts) 1371 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src); 1372 else 1373 RxReorderIndicatePacket(ieee, rxb, ts, SeqNum); 1374 1375 dev_kfree_skb(skb); 1376 1377 rx_exit: 1378 return 1; 1379 1380 rx_dropped: 1381 ieee->stats.rx_dropped++; 1382 1383 /* Returning 0 indicates to caller that we have not handled the SKB-- 1384 * so it is still allocated and can be used again by underlying 1385 * hardware as a DMA target 1386 */ 1387 return 0; 1388 } 1389 1390 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb, 1391 struct rtllib_rx_stats *rx_stats) 1392 { 1393 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 1394 u16 fc = le16_to_cpu(hdr->frame_control); 1395 size_t hdrlen = rtllib_get_hdrlen(fc); 1396 1397 if (skb->len < hdrlen) { 1398 netdev_info(ieee->dev, 1399 "%s():ERR!!! skb->len is smaller than hdrlen\n", 1400 __func__); 1401 return 0; 1402 } 1403 1404 if (ht_c_check(ieee, skb->data)) { 1405 if (net_ratelimit()) 1406 netdev_info(ieee->dev, "%s: Find HTCControl!\n", 1407 __func__); 1408 hdrlen += 4; 1409 } 1410 1411 ieee->stats.rx_packets++; 1412 ieee->stats.rx_bytes += skb->len; 1413 rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen); 1414 1415 return 1; 1416 } 1417 1418 /* All received frames are sent to this function. @skb contains the frame in 1419 * IEEE 802.11 format, i.e., in the format it was sent over air. 1420 * This function is called only as a tasklet (software IRQ). 1421 */ 1422 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb, 1423 struct rtllib_rx_stats *rx_stats) 1424 { 1425 int ret = 0; 1426 1427 if (!ieee || !skb || !rx_stats) { 1428 pr_info("%s: Input parameters NULL!\n", __func__); 1429 goto rx_dropped; 1430 } 1431 if (skb->len < 10) { 1432 netdev_info(ieee->dev, "%s: SKB length < 10\n", __func__); 1433 goto rx_dropped; 1434 } 1435 1436 switch (ieee->iw_mode) { 1437 case IW_MODE_INFRA: 1438 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats); 1439 break; 1440 case IW_MODE_MONITOR: 1441 ret = rtllib_rx_Monitor(ieee, skb, rx_stats); 1442 break; 1443 default: 1444 netdev_info(ieee->dev, "%s: ERR iw mode!!!\n", __func__); 1445 break; 1446 } 1447 1448 return ret; 1449 1450 rx_dropped: 1451 if (ieee) 1452 ieee->stats.rx_dropped++; 1453 return 0; 1454 } 1455 EXPORT_SYMBOL(rtllib_rx); 1456 1457 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 }; 1458 1459 /* Make ther structure we read from the beacon packet has the right values */ 1460 static int rtllib_verify_qos_info(struct rtllib_qos_information_element 1461 *info_element, int sub_type) 1462 { 1463 if (info_element->elementID != QOS_ELEMENT_ID) 1464 return -1; 1465 if (info_element->qui_subtype != sub_type) 1466 return -1; 1467 if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN)) 1468 return -1; 1469 if (info_element->qui_type != QOS_OUI_TYPE) 1470 return -1; 1471 if (info_element->version != QOS_VERSION_1) 1472 return -1; 1473 1474 return 0; 1475 } 1476 1477 /* Parse a QoS parameter element */ 1478 static int rtllib_read_qos_param_element( 1479 struct rtllib_qos_parameter_info *element_param, 1480 struct rtllib_info_element *info_element) 1481 { 1482 size_t size = sizeof(*element_param); 1483 1484 if (!element_param || !info_element || info_element->len != size - 2) 1485 return -1; 1486 1487 memcpy(element_param, info_element, size); 1488 return rtllib_verify_qos_info(&element_param->info_element, 1489 QOS_OUI_PARAM_SUB_TYPE); 1490 } 1491 1492 /* Parse a QoS information element */ 1493 static int rtllib_read_qos_info_element( 1494 struct rtllib_qos_information_element *element_info, 1495 struct rtllib_info_element *info_element) 1496 { 1497 size_t size = sizeof(*element_info); 1498 1499 if (!element_info || !info_element || info_element->len != size - 2) 1500 return -1; 1501 1502 memcpy(element_info, info_element, size); 1503 return rtllib_verify_qos_info(element_info, QOS_OUI_INFO_SUB_TYPE); 1504 } 1505 1506 /* Write QoS parameters from the ac parameters. */ 1507 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm, 1508 struct rtllib_qos_data *qos_data) 1509 { 1510 struct rtllib_qos_ac_parameter *ac_params; 1511 struct rtllib_qos_parameters *qos_param = &(qos_data->parameters); 1512 int i; 1513 u8 aci; 1514 u8 acm; 1515 1516 qos_data->wmm_acm = 0; 1517 for (i = 0; i < QOS_QUEUE_NUM; i++) { 1518 ac_params = &(param_elm->ac_params_record[i]); 1519 1520 aci = (ac_params->aci_aifsn & 0x60) >> 5; 1521 acm = (ac_params->aci_aifsn & 0x10) >> 4; 1522 1523 if (aci >= QOS_QUEUE_NUM) 1524 continue; 1525 switch (aci) { 1526 case 1: 1527 /* BIT(0) | BIT(3) */ 1528 if (acm) 1529 qos_data->wmm_acm |= (0x01 << 0) | (0x01 << 3); 1530 break; 1531 case 2: 1532 /* BIT(4) | BIT(5) */ 1533 if (acm) 1534 qos_data->wmm_acm |= (0x01 << 4) | (0x01 << 5); 1535 break; 1536 case 3: 1537 /* BIT(6) | BIT(7) */ 1538 if (acm) 1539 qos_data->wmm_acm |= (0x01 << 6) | (0x01 << 7); 1540 break; 1541 case 0: 1542 default: 1543 /* BIT(1) | BIT(2) */ 1544 if (acm) 1545 qos_data->wmm_acm |= (0x01 << 1) | (0x01 << 2); 1546 break; 1547 } 1548 1549 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f; 1550 1551 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */ 1552 qos_param->aifs[aci] = max_t(u8, qos_param->aifs[aci], 2); 1553 1554 qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max & 1555 0x0F); 1556 1557 qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max & 1558 0xF0) >> 4); 1559 1560 qos_param->flag[aci] = 1561 (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00; 1562 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit; 1563 } 1564 return 0; 1565 } 1566 1567 /* we have a generic data element which it may contain QoS information or 1568 * parameters element. check the information element length to decide 1569 * which type to read 1570 */ 1571 static int rtllib_parse_qos_info_param_IE(struct rtllib_device *ieee, 1572 struct rtllib_info_element 1573 *info_element, 1574 struct rtllib_network *network) 1575 { 1576 int rc = 0; 1577 struct rtllib_qos_information_element qos_info_element; 1578 1579 rc = rtllib_read_qos_info_element(&qos_info_element, info_element); 1580 1581 if (rc == 0) { 1582 network->qos_data.param_count = qos_info_element.ac_info & 0x0F; 1583 network->flags |= NETWORK_HAS_QOS_INFORMATION; 1584 } else { 1585 struct rtllib_qos_parameter_info param_element; 1586 1587 rc = rtllib_read_qos_param_element(¶m_element, 1588 info_element); 1589 if (rc == 0) { 1590 rtllib_qos_convert_ac_to_parameters(¶m_element, 1591 &(network->qos_data)); 1592 network->flags |= NETWORK_HAS_QOS_PARAMETERS; 1593 network->qos_data.param_count = 1594 param_element.info_element.ac_info & 0x0F; 1595 } 1596 } 1597 1598 if (rc == 0) { 1599 netdev_dbg(ieee->dev, "QoS is supported\n"); 1600 network->qos_data.supported = 1; 1601 } 1602 return rc; 1603 } 1604 1605 static const char *get_info_element_string(u16 id) 1606 { 1607 switch (id) { 1608 case MFIE_TYPE_SSID: 1609 return "SSID"; 1610 case MFIE_TYPE_RATES: 1611 return "RATES"; 1612 case MFIE_TYPE_FH_SET: 1613 return "FH_SET"; 1614 case MFIE_TYPE_DS_SET: 1615 return "DS_SET"; 1616 case MFIE_TYPE_CF_SET: 1617 return "CF_SET"; 1618 case MFIE_TYPE_TIM: 1619 return "TIM"; 1620 case MFIE_TYPE_IBSS_SET: 1621 return "IBSS_SET"; 1622 case MFIE_TYPE_COUNTRY: 1623 return "COUNTRY"; 1624 case MFIE_TYPE_HOP_PARAMS: 1625 return "HOP_PARAMS"; 1626 case MFIE_TYPE_HOP_TABLE: 1627 return "HOP_TABLE"; 1628 case MFIE_TYPE_REQUEST: 1629 return "REQUEST"; 1630 case MFIE_TYPE_CHALLENGE: 1631 return "CHALLENGE"; 1632 case MFIE_TYPE_POWER_CONSTRAINT: 1633 return "POWER_CONSTRAINT"; 1634 case MFIE_TYPE_POWER_CAPABILITY: 1635 return "POWER_CAPABILITY"; 1636 case MFIE_TYPE_TPC_REQUEST: 1637 return "TPC_REQUEST"; 1638 case MFIE_TYPE_TPC_REPORT: 1639 return "TPC_REPORT"; 1640 case MFIE_TYPE_SUPP_CHANNELS: 1641 return "SUPP_CHANNELS"; 1642 case MFIE_TYPE_CSA: 1643 return "CSA"; 1644 case MFIE_TYPE_MEASURE_REQUEST: 1645 return "MEASURE_REQUEST"; 1646 case MFIE_TYPE_MEASURE_REPORT: 1647 return "MEASURE_REPORT"; 1648 case MFIE_TYPE_QUIET: 1649 return "QUIET"; 1650 case MFIE_TYPE_IBSS_DFS: 1651 return "IBSS_DFS"; 1652 case MFIE_TYPE_RSN: 1653 return "RSN"; 1654 case MFIE_TYPE_RATES_EX: 1655 return "RATES_EX"; 1656 case MFIE_TYPE_GENERIC: 1657 return "GENERIC"; 1658 case MFIE_TYPE_QOS_PARAMETER: 1659 return "QOS_PARAMETER"; 1660 default: 1661 return "UNKNOWN"; 1662 } 1663 } 1664 1665 static void rtllib_parse_mife_generic(struct rtllib_device *ieee, 1666 struct rtllib_info_element *info_element, 1667 struct rtllib_network *network, 1668 u16 *tmp_htcap_len, 1669 u16 *tmp_htinfo_len) 1670 { 1671 u16 ht_realtek_agg_len = 0; 1672 u8 ht_realtek_agg_buf[MAX_IE_LEN]; 1673 1674 if (!rtllib_parse_qos_info_param_IE(ieee, info_element, network)) 1675 return; 1676 if (info_element->len >= 4 && 1677 info_element->data[0] == 0x00 && 1678 info_element->data[1] == 0x50 && 1679 info_element->data[2] == 0xf2 && 1680 info_element->data[3] == 0x01) { 1681 network->wpa_ie_len = min(info_element->len + 2, 1682 MAX_WPA_IE_LEN); 1683 memcpy(network->wpa_ie, info_element, network->wpa_ie_len); 1684 return; 1685 } 1686 if (info_element->len == 7 && 1687 info_element->data[0] == 0x00 && 1688 info_element->data[1] == 0xe0 && 1689 info_element->data[2] == 0x4c && 1690 info_element->data[3] == 0x01 && 1691 info_element->data[4] == 0x02) 1692 network->Turbo_Enable = 1; 1693 1694 if (*tmp_htcap_len == 0) { 1695 if (info_element->len >= 4 && 1696 info_element->data[0] == 0x00 && 1697 info_element->data[1] == 0x90 && 1698 info_element->data[2] == 0x4c && 1699 info_element->data[3] == 0x033) { 1700 *tmp_htcap_len = min_t(u8, info_element->len, 1701 MAX_IE_LEN); 1702 if (*tmp_htcap_len != 0) { 1703 network->bssht.bd_ht_spec_ver = HT_SPEC_VER_EWC; 1704 network->bssht.bd_ht_cap_len = min_t(u16, *tmp_htcap_len, 1705 sizeof(network->bssht.bd_ht_cap_buf)); 1706 memcpy(network->bssht.bd_ht_cap_buf, 1707 info_element->data, 1708 network->bssht.bd_ht_cap_len); 1709 } 1710 } 1711 if (*tmp_htcap_len != 0) { 1712 network->bssht.bd_support_ht = true; 1713 network->bssht.bd_ht_1r = ((((struct ht_capab_ele *)(network->bssht.bd_ht_cap_buf))->MCS[1]) == 0); 1714 } else { 1715 network->bssht.bd_support_ht = false; 1716 network->bssht.bd_ht_1r = false; 1717 } 1718 } 1719 1720 if (*tmp_htinfo_len == 0) { 1721 if (info_element->len >= 4 && 1722 info_element->data[0] == 0x00 && 1723 info_element->data[1] == 0x90 && 1724 info_element->data[2] == 0x4c && 1725 info_element->data[3] == 0x034) { 1726 *tmp_htinfo_len = min_t(u8, info_element->len, 1727 MAX_IE_LEN); 1728 if (*tmp_htinfo_len != 0) { 1729 network->bssht.bd_ht_spec_ver = HT_SPEC_VER_EWC; 1730 network->bssht.bd_ht_info_len = min_t(u16, *tmp_htinfo_len, 1731 sizeof(network->bssht.bd_ht_info_buf)); 1732 memcpy(network->bssht.bd_ht_info_buf, 1733 info_element->data, 1734 network->bssht.bd_ht_info_len); 1735 } 1736 } 1737 } 1738 1739 if (network->bssht.bd_support_ht) { 1740 if (info_element->len >= 4 && 1741 info_element->data[0] == 0x00 && 1742 info_element->data[1] == 0xe0 && 1743 info_element->data[2] == 0x4c && 1744 info_element->data[3] == 0x02) { 1745 ht_realtek_agg_len = min_t(u8, info_element->len, 1746 MAX_IE_LEN); 1747 memcpy(ht_realtek_agg_buf, info_element->data, 1748 info_element->len); 1749 } 1750 if (ht_realtek_agg_len >= 5) { 1751 network->realtek_cap_exit = true; 1752 network->bssht.bd_rt2rt_aggregation = true; 1753 1754 if ((ht_realtek_agg_buf[4] == 1) && 1755 (ht_realtek_agg_buf[5] & 0x02)) 1756 network->bssht.bd_rt2rt_long_slot_time = true; 1757 1758 if ((ht_realtek_agg_buf[4] == 1) && 1759 (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE)) 1760 network->bssht.rt2rt_ht_mode |= RT_HT_CAP_USE_92SE; 1761 } 1762 } 1763 if (ht_realtek_agg_len >= 5) { 1764 if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP)) 1765 network->bssht.rt2rt_ht_mode |= RT_HT_CAP_USE_SOFTAP; 1766 } 1767 1768 if ((info_element->len >= 3 && 1769 info_element->data[0] == 0x00 && 1770 info_element->data[1] == 0x05 && 1771 info_element->data[2] == 0xb5) || 1772 (info_element->len >= 3 && 1773 info_element->data[0] == 0x00 && 1774 info_element->data[1] == 0x0a && 1775 info_element->data[2] == 0xf7) || 1776 (info_element->len >= 3 && 1777 info_element->data[0] == 0x00 && 1778 info_element->data[1] == 0x10 && 1779 info_element->data[2] == 0x18)) { 1780 network->broadcom_cap_exist = true; 1781 } 1782 if (info_element->len >= 3 && 1783 info_element->data[0] == 0x00 && 1784 info_element->data[1] == 0x0c && 1785 info_element->data[2] == 0x43) 1786 network->ralink_cap_exist = true; 1787 if ((info_element->len >= 3 && 1788 info_element->data[0] == 0x00 && 1789 info_element->data[1] == 0x03 && 1790 info_element->data[2] == 0x7f) || 1791 (info_element->len >= 3 && 1792 info_element->data[0] == 0x00 && 1793 info_element->data[1] == 0x13 && 1794 info_element->data[2] == 0x74)) 1795 network->atheros_cap_exist = true; 1796 1797 if ((info_element->len >= 3 && 1798 info_element->data[0] == 0x00 && 1799 info_element->data[1] == 0x50 && 1800 info_element->data[2] == 0x43)) 1801 network->marvell_cap_exist = true; 1802 if (info_element->len >= 3 && 1803 info_element->data[0] == 0x00 && 1804 info_element->data[1] == 0x40 && 1805 info_element->data[2] == 0x96) 1806 network->cisco_cap_exist = true; 1807 1808 if (info_element->len >= 3 && 1809 info_element->data[0] == 0x00 && 1810 info_element->data[1] == 0x0a && 1811 info_element->data[2] == 0xf5) 1812 network->airgo_cap_exist = true; 1813 1814 if (info_element->len > 4 && 1815 info_element->data[0] == 0x00 && 1816 info_element->data[1] == 0x40 && 1817 info_element->data[2] == 0x96 && 1818 info_element->data[3] == 0x01) { 1819 if (info_element->len == 6) { 1820 memcpy(network->CcxRmState, &info_element->data[4], 2); 1821 if (network->CcxRmState[0] != 0) 1822 network->bCcxRmEnable = true; 1823 else 1824 network->bCcxRmEnable = false; 1825 network->MBssidMask = network->CcxRmState[1] & 0x07; 1826 if (network->MBssidMask != 0) { 1827 network->bMBssidValid = true; 1828 network->MBssidMask = 0xff << 1829 (network->MBssidMask); 1830 ether_addr_copy(network->MBssid, 1831 network->bssid); 1832 network->MBssid[5] &= network->MBssidMask; 1833 } else { 1834 network->bMBssidValid = false; 1835 } 1836 } else { 1837 network->bCcxRmEnable = false; 1838 } 1839 } 1840 if (info_element->len > 4 && 1841 info_element->data[0] == 0x00 && 1842 info_element->data[1] == 0x40 && 1843 info_element->data[2] == 0x96 && 1844 info_element->data[3] == 0x03) { 1845 if (info_element->len == 5) { 1846 network->bWithCcxVerNum = true; 1847 network->BssCcxVerNumber = info_element->data[4]; 1848 } else { 1849 network->bWithCcxVerNum = false; 1850 network->BssCcxVerNumber = 0; 1851 } 1852 } 1853 if (info_element->len > 4 && 1854 info_element->data[0] == 0x00 && 1855 info_element->data[1] == 0x50 && 1856 info_element->data[2] == 0xf2 && 1857 info_element->data[3] == 0x04) { 1858 netdev_dbg(ieee->dev, "MFIE_TYPE_WZC: %d bytes\n", 1859 info_element->len); 1860 network->wzc_ie_len = min(info_element->len + 2, MAX_WZC_IE_LEN); 1861 memcpy(network->wzc_ie, info_element, network->wzc_ie_len); 1862 } 1863 } 1864 1865 static void rtllib_parse_mfie_ht_cap(struct rtllib_info_element *info_element, 1866 struct rtllib_network *network, 1867 u16 *tmp_htcap_len) 1868 { 1869 struct bss_ht *ht = &network->bssht; 1870 1871 *tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN); 1872 if (*tmp_htcap_len != 0) { 1873 ht->bd_ht_spec_ver = HT_SPEC_VER_EWC; 1874 ht->bd_ht_cap_len = min_t(u16, *tmp_htcap_len, 1875 sizeof(ht->bd_ht_cap_buf)); 1876 memcpy(ht->bd_ht_cap_buf, info_element->data, ht->bd_ht_cap_len); 1877 1878 ht->bd_support_ht = true; 1879 ht->bd_ht_1r = ((((struct ht_capab_ele *) 1880 ht->bd_ht_cap_buf))->MCS[1]) == 0; 1881 1882 ht->bd_bandwidth = (enum ht_channel_width) 1883 (((struct ht_capab_ele *) 1884 (ht->bd_ht_cap_buf))->ChlWidth); 1885 } else { 1886 ht->bd_support_ht = false; 1887 ht->bd_ht_1r = false; 1888 ht->bd_bandwidth = HT_CHANNEL_WIDTH_20; 1889 } 1890 } 1891 1892 int rtllib_parse_info_param(struct rtllib_device *ieee, 1893 struct rtllib_info_element *info_element, 1894 u16 length, 1895 struct rtllib_network *network, 1896 struct rtllib_rx_stats *stats) 1897 { 1898 u8 i; 1899 short offset; 1900 u16 tmp_htcap_len = 0; 1901 u16 tmp_htinfo_len = 0; 1902 char rates_str[64]; 1903 char *p; 1904 1905 while (length >= sizeof(*info_element)) { 1906 if (sizeof(*info_element) + info_element->len > length) { 1907 netdev_dbg(ieee->dev, 1908 "Info elem: parse failed: info_element->len + 2 > left : info_element->len+2=%zd left=%d, id=%d.\n", 1909 info_element->len + sizeof(*info_element), 1910 length, info_element->id); 1911 /* We stop processing but don't return an error here 1912 * because some misbehaviour APs break this rule. ie. 1913 * Orinoco AP1000. 1914 */ 1915 break; 1916 } 1917 1918 switch (info_element->id) { 1919 case MFIE_TYPE_SSID: 1920 if (rtllib_is_empty_essid(info_element->data, 1921 info_element->len)) { 1922 network->flags |= NETWORK_EMPTY_ESSID; 1923 break; 1924 } 1925 1926 network->ssid_len = min(info_element->len, 1927 (u8)IW_ESSID_MAX_SIZE); 1928 memcpy(network->ssid, info_element->data, 1929 network->ssid_len); 1930 if (network->ssid_len < IW_ESSID_MAX_SIZE) 1931 memset(network->ssid + network->ssid_len, 0, 1932 IW_ESSID_MAX_SIZE - network->ssid_len); 1933 1934 netdev_dbg(ieee->dev, "MFIE_TYPE_SSID: '%s' len=%d.\n", 1935 network->ssid, network->ssid_len); 1936 break; 1937 1938 case MFIE_TYPE_RATES: 1939 p = rates_str; 1940 network->rates_len = min(info_element->len, 1941 MAX_RATES_LENGTH); 1942 for (i = 0; i < network->rates_len; i++) { 1943 network->rates[i] = info_element->data[i]; 1944 p += scnprintf(p, sizeof(rates_str) - 1945 (p - rates_str), "%02X ", 1946 network->rates[i]); 1947 if (rtllib_is_ofdm_rate 1948 (info_element->data[i])) { 1949 network->flags |= NETWORK_HAS_OFDM; 1950 if (info_element->data[i] & 1951 RTLLIB_BASIC_RATE_MASK) 1952 network->flags &= 1953 ~NETWORK_HAS_CCK; 1954 } 1955 1956 if (rtllib_is_cck_rate 1957 (info_element->data[i])) { 1958 network->flags |= NETWORK_HAS_CCK; 1959 } 1960 } 1961 1962 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES: '%s' (%d)\n", 1963 rates_str, network->rates_len); 1964 break; 1965 1966 case MFIE_TYPE_RATES_EX: 1967 p = rates_str; 1968 network->rates_ex_len = min(info_element->len, 1969 MAX_RATES_EX_LENGTH); 1970 for (i = 0; i < network->rates_ex_len; i++) { 1971 network->rates_ex[i] = info_element->data[i]; 1972 p += scnprintf(p, sizeof(rates_str) - 1973 (p - rates_str), "%02X ", 1974 network->rates_ex[i]); 1975 if (rtllib_is_ofdm_rate 1976 (info_element->data[i])) { 1977 network->flags |= NETWORK_HAS_OFDM; 1978 if (info_element->data[i] & 1979 RTLLIB_BASIC_RATE_MASK) 1980 network->flags &= 1981 ~NETWORK_HAS_CCK; 1982 } 1983 } 1984 1985 netdev_dbg(ieee->dev, "MFIE_TYPE_RATES_EX: '%s' (%d)\n", 1986 rates_str, network->rates_ex_len); 1987 break; 1988 1989 case MFIE_TYPE_DS_SET: 1990 netdev_dbg(ieee->dev, "MFIE_TYPE_DS_SET: %d\n", 1991 info_element->data[0]); 1992 network->channel = info_element->data[0]; 1993 break; 1994 1995 case MFIE_TYPE_FH_SET: 1996 netdev_dbg(ieee->dev, "MFIE_TYPE_FH_SET: ignored\n"); 1997 break; 1998 1999 case MFIE_TYPE_CF_SET: 2000 netdev_dbg(ieee->dev, "MFIE_TYPE_CF_SET: ignored\n"); 2001 break; 2002 2003 case MFIE_TYPE_TIM: 2004 if (info_element->len < 4) 2005 break; 2006 2007 network->tim.tim_count = info_element->data[0]; 2008 network->tim.tim_period = info_element->data[1]; 2009 2010 network->dtim_period = info_element->data[1]; 2011 if (ieee->link_state != MAC80211_LINKED) 2012 break; 2013 network->last_dtim_sta_time = jiffies; 2014 2015 network->dtim_data = RTLLIB_DTIM_VALID; 2016 2017 if (info_element->data[2] & 1) 2018 network->dtim_data |= RTLLIB_DTIM_MBCAST; 2019 2020 offset = (info_element->data[2] >> 1) * 2; 2021 2022 if (ieee->assoc_id < 8 * offset || 2023 ieee->assoc_id > 8 * (offset + info_element->len - 3)) 2024 break; 2025 2026 offset = (ieee->assoc_id / 8) - offset; 2027 if (info_element->data[3 + offset] & 2028 (1 << (ieee->assoc_id % 8))) 2029 network->dtim_data |= RTLLIB_DTIM_UCAST; 2030 2031 network->listen_interval = network->dtim_period; 2032 break; 2033 2034 case MFIE_TYPE_ERP: 2035 network->erp_value = info_element->data[0]; 2036 network->flags |= NETWORK_HAS_ERP_VALUE; 2037 netdev_dbg(ieee->dev, "MFIE_TYPE_ERP_SET: %d\n", 2038 network->erp_value); 2039 break; 2040 case MFIE_TYPE_IBSS_SET: 2041 network->atim_window = info_element->data[0]; 2042 netdev_dbg(ieee->dev, "MFIE_TYPE_IBSS_SET: %d\n", 2043 network->atim_window); 2044 break; 2045 2046 case MFIE_TYPE_CHALLENGE: 2047 netdev_dbg(ieee->dev, "MFIE_TYPE_CHALLENGE: ignored\n"); 2048 break; 2049 2050 case MFIE_TYPE_GENERIC: 2051 netdev_dbg(ieee->dev, "MFIE_TYPE_GENERIC: %d bytes\n", 2052 info_element->len); 2053 2054 rtllib_parse_mife_generic(ieee, info_element, network, 2055 &tmp_htcap_len, 2056 &tmp_htinfo_len); 2057 break; 2058 2059 case MFIE_TYPE_RSN: 2060 netdev_dbg(ieee->dev, "MFIE_TYPE_RSN: %d bytes\n", 2061 info_element->len); 2062 network->rsn_ie_len = min(info_element->len + 2, 2063 MAX_WPA_IE_LEN); 2064 memcpy(network->rsn_ie, info_element, 2065 network->rsn_ie_len); 2066 break; 2067 2068 case MFIE_TYPE_HT_CAP: 2069 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_CAP: %d bytes\n", 2070 info_element->len); 2071 2072 rtllib_parse_mfie_ht_cap(info_element, network, 2073 &tmp_htcap_len); 2074 break; 2075 2076 case MFIE_TYPE_HT_INFO: 2077 netdev_dbg(ieee->dev, "MFIE_TYPE_HT_INFO: %d bytes\n", 2078 info_element->len); 2079 tmp_htinfo_len = min_t(u8, info_element->len, 2080 MAX_IE_LEN); 2081 if (tmp_htinfo_len) { 2082 network->bssht.bd_ht_spec_ver = HT_SPEC_VER_IEEE; 2083 network->bssht.bd_ht_info_len = tmp_htinfo_len > 2084 sizeof(network->bssht.bd_ht_info_buf) ? 2085 sizeof(network->bssht.bd_ht_info_buf) : 2086 tmp_htinfo_len; 2087 memcpy(network->bssht.bd_ht_info_buf, 2088 info_element->data, 2089 network->bssht.bd_ht_info_len); 2090 } 2091 break; 2092 2093 case MFIE_TYPE_AIRONET: 2094 netdev_dbg(ieee->dev, "MFIE_TYPE_AIRONET: %d bytes\n", 2095 info_element->len); 2096 if (info_element->len > IE_CISCO_FLAG_POSITION) { 2097 network->bWithAironetIE = true; 2098 2099 if ((info_element->data[IE_CISCO_FLAG_POSITION] 2100 & SUPPORT_CKIP_MIC) || 2101 (info_element->data[IE_CISCO_FLAG_POSITION] 2102 & SUPPORT_CKIP_PK)) 2103 network->bCkipSupported = true; 2104 else 2105 network->bCkipSupported = false; 2106 } else { 2107 network->bWithAironetIE = false; 2108 network->bCkipSupported = false; 2109 } 2110 break; 2111 case MFIE_TYPE_QOS_PARAMETER: 2112 netdev_err(ieee->dev, 2113 "QoS Error need to parse QOS_PARAMETER IE\n"); 2114 break; 2115 2116 case MFIE_TYPE_COUNTRY: 2117 netdev_dbg(ieee->dev, "MFIE_TYPE_COUNTRY: %d bytes\n", 2118 info_element->len); 2119 break; 2120 /* TODO */ 2121 default: 2122 netdev_dbg(ieee->dev, 2123 "Unsupported info element: %s (%d)\n", 2124 get_info_element_string(info_element->id), 2125 info_element->id); 2126 break; 2127 } 2128 2129 length -= sizeof(*info_element) + info_element->len; 2130 info_element = 2131 (struct rtllib_info_element *)&info_element->data[info_element->len]; 2132 } 2133 2134 if (!network->atheros_cap_exist && !network->broadcom_cap_exist && 2135 !network->cisco_cap_exist && !network->ralink_cap_exist && 2136 !network->bssht.bd_rt2rt_aggregation) 2137 network->unknown_cap_exist = true; 2138 else 2139 network->unknown_cap_exist = false; 2140 return 0; 2141 } 2142 2143 static long rtllib_translate_todbm(u8 signal_strength_index) 2144 { 2145 long signal_power; 2146 2147 signal_power = (long)((signal_strength_index + 1) >> 1); 2148 signal_power -= 95; 2149 2150 return signal_power; 2151 } 2152 2153 static inline int rtllib_network_init( 2154 struct rtllib_device *ieee, 2155 struct rtllib_probe_response *beacon, 2156 struct rtllib_network *network, 2157 struct rtllib_rx_stats *stats) 2158 { 2159 memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data)); 2160 2161 /* Pull out fixed field data */ 2162 ether_addr_copy(network->bssid, beacon->header.addr3); 2163 network->capability = le16_to_cpu(beacon->capability); 2164 network->last_scanned = jiffies; 2165 network->time_stamp[0] = beacon->time_stamp[0]; 2166 network->time_stamp[1] = beacon->time_stamp[1]; 2167 network->beacon_interval = le16_to_cpu(beacon->beacon_interval); 2168 /* Where to pull this? beacon->listen_interval;*/ 2169 network->listen_interval = 0x0A; 2170 network->rates_len = network->rates_ex_len = 0; 2171 network->ssid_len = 0; 2172 network->hidden_ssid_len = 0; 2173 memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid)); 2174 network->flags = 0; 2175 network->atim_window = 0; 2176 network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ? 2177 0x3 : 0x0; 2178 network->berp_info_valid = false; 2179 network->broadcom_cap_exist = false; 2180 network->ralink_cap_exist = false; 2181 network->atheros_cap_exist = false; 2182 network->cisco_cap_exist = false; 2183 network->unknown_cap_exist = false; 2184 network->realtek_cap_exit = false; 2185 network->marvell_cap_exist = false; 2186 network->airgo_cap_exist = false; 2187 network->Turbo_Enable = 0; 2188 network->SignalStrength = stats->SignalStrength; 2189 network->RSSI = stats->SignalStrength; 2190 network->CountryIeLen = 0; 2191 memset(network->CountryIeBuf, 0, MAX_IE_LEN); 2192 ht_initialize_bss_desc(&network->bssht); 2193 network->flags |= NETWORK_HAS_CCK; 2194 2195 network->wpa_ie_len = 0; 2196 network->rsn_ie_len = 0; 2197 network->wzc_ie_len = 0; 2198 2199 if (rtllib_parse_info_param(ieee, 2200 beacon->info_element, 2201 (stats->len - sizeof(*beacon)), 2202 network, 2203 stats)) 2204 return 1; 2205 2206 network->mode = 0; 2207 2208 if (network->flags & NETWORK_HAS_OFDM) 2209 network->mode |= WIRELESS_MODE_G; 2210 if (network->flags & NETWORK_HAS_CCK) 2211 network->mode |= WIRELESS_MODE_B; 2212 2213 if (network->mode == 0) { 2214 netdev_dbg(ieee->dev, "Filtered out '%s (%pM)' network.\n", 2215 escape_essid(network->ssid, network->ssid_len), 2216 network->bssid); 2217 return 1; 2218 } 2219 2220 if (network->bssht.bd_support_ht) { 2221 if (network->mode & (WIRELESS_MODE_G | WIRELESS_MODE_B)) 2222 network->mode = WIRELESS_MODE_N_24G; 2223 } 2224 if (rtllib_is_empty_essid(network->ssid, network->ssid_len)) 2225 network->flags |= NETWORK_EMPTY_ESSID; 2226 stats->signal = 30 + (stats->SignalStrength * 70) / 100; 2227 stats->noise = rtllib_translate_todbm((u8)(100 - stats->signal)) - 25; 2228 2229 memcpy(&network->stats, stats, sizeof(network->stats)); 2230 2231 return 0; 2232 } 2233 2234 static inline int is_same_network(struct rtllib_network *src, 2235 struct rtllib_network *dst, u8 ssidbroad) 2236 { 2237 /* A network is only a duplicate if the channel, BSSID, ESSID 2238 * and the capability field (in particular IBSS and BSS) all match. 2239 * We treat all <hidden> with the same BSSID and channel 2240 * as one network 2241 */ 2242 return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) && 2243 (src->channel == dst->channel) && 2244 !memcmp(src->bssid, dst->bssid, ETH_ALEN) && 2245 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || 2246 (!ssidbroad)) && 2247 ((src->capability & WLAN_CAPABILITY_IBSS) == 2248 (dst->capability & WLAN_CAPABILITY_IBSS)) && 2249 ((src->capability & WLAN_CAPABILITY_ESS) == 2250 (dst->capability & WLAN_CAPABILITY_ESS))); 2251 } 2252 2253 static inline void update_network(struct rtllib_device *ieee, 2254 struct rtllib_network *dst, 2255 struct rtllib_network *src) 2256 { 2257 int qos_active; 2258 u8 old_param; 2259 2260 memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats)); 2261 dst->capability = src->capability; 2262 memcpy(dst->rates, src->rates, src->rates_len); 2263 dst->rates_len = src->rates_len; 2264 memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len); 2265 dst->rates_ex_len = src->rates_ex_len; 2266 if (src->ssid_len > 0) { 2267 if (dst->ssid_len == 0) { 2268 memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid)); 2269 dst->hidden_ssid_len = src->ssid_len; 2270 memcpy(dst->hidden_ssid, src->ssid, src->ssid_len); 2271 } else { 2272 memset(dst->ssid, 0, dst->ssid_len); 2273 dst->ssid_len = src->ssid_len; 2274 memcpy(dst->ssid, src->ssid, src->ssid_len); 2275 } 2276 } 2277 dst->mode = src->mode; 2278 dst->flags = src->flags; 2279 dst->time_stamp[0] = src->time_stamp[0]; 2280 dst->time_stamp[1] = src->time_stamp[1]; 2281 if (src->flags & NETWORK_HAS_ERP_VALUE) { 2282 dst->erp_value = src->erp_value; 2283 dst->berp_info_valid = src->berp_info_valid = true; 2284 } 2285 dst->beacon_interval = src->beacon_interval; 2286 dst->listen_interval = src->listen_interval; 2287 dst->atim_window = src->atim_window; 2288 dst->dtim_period = src->dtim_period; 2289 dst->dtim_data = src->dtim_data; 2290 dst->last_dtim_sta_time = src->last_dtim_sta_time; 2291 memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters)); 2292 2293 dst->bssht.bd_support_ht = src->bssht.bd_support_ht; 2294 dst->bssht.bd_rt2rt_aggregation = src->bssht.bd_rt2rt_aggregation; 2295 dst->bssht.bd_ht_cap_len = src->bssht.bd_ht_cap_len; 2296 memcpy(dst->bssht.bd_ht_cap_buf, src->bssht.bd_ht_cap_buf, 2297 src->bssht.bd_ht_cap_len); 2298 dst->bssht.bd_ht_info_len = src->bssht.bd_ht_info_len; 2299 memcpy(dst->bssht.bd_ht_info_buf, src->bssht.bd_ht_info_buf, 2300 src->bssht.bd_ht_info_len); 2301 dst->bssht.bd_ht_spec_ver = src->bssht.bd_ht_spec_ver; 2302 dst->bssht.bd_rt2rt_long_slot_time = src->bssht.bd_rt2rt_long_slot_time; 2303 dst->broadcom_cap_exist = src->broadcom_cap_exist; 2304 dst->ralink_cap_exist = src->ralink_cap_exist; 2305 dst->atheros_cap_exist = src->atheros_cap_exist; 2306 dst->realtek_cap_exit = src->realtek_cap_exit; 2307 dst->marvell_cap_exist = src->marvell_cap_exist; 2308 dst->cisco_cap_exist = src->cisco_cap_exist; 2309 dst->airgo_cap_exist = src->airgo_cap_exist; 2310 dst->unknown_cap_exist = src->unknown_cap_exist; 2311 memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len); 2312 dst->wpa_ie_len = src->wpa_ie_len; 2313 memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len); 2314 dst->rsn_ie_len = src->rsn_ie_len; 2315 memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len); 2316 dst->wzc_ie_len = src->wzc_ie_len; 2317 2318 dst->last_scanned = jiffies; 2319 /* qos related parameters */ 2320 qos_active = dst->qos_data.active; 2321 old_param = dst->qos_data.param_count; 2322 dst->qos_data.supported = src->qos_data.supported; 2323 if (dst->flags & NETWORK_HAS_QOS_PARAMETERS) 2324 memcpy(&dst->qos_data, &src->qos_data, 2325 sizeof(struct rtllib_qos_data)); 2326 if (dst->qos_data.supported == 1) { 2327 if (dst->ssid_len) 2328 netdev_dbg(ieee->dev, 2329 "QoS the network %s is QoS supported\n", 2330 dst->ssid); 2331 else 2332 netdev_dbg(ieee->dev, 2333 "QoS the network is QoS supported\n"); 2334 } 2335 dst->qos_data.active = qos_active; 2336 dst->qos_data.old_param_count = old_param; 2337 2338 dst->wmm_info = src->wmm_info; 2339 if (src->wmm_param[0].ac_aci_acm_aifsn || 2340 src->wmm_param[1].ac_aci_acm_aifsn || 2341 src->wmm_param[2].ac_aci_acm_aifsn || 2342 src->wmm_param[3].ac_aci_acm_aifsn) 2343 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN); 2344 2345 dst->SignalStrength = src->SignalStrength; 2346 dst->RSSI = src->RSSI; 2347 dst->Turbo_Enable = src->Turbo_Enable; 2348 2349 dst->CountryIeLen = src->CountryIeLen; 2350 memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen); 2351 2352 dst->bWithAironetIE = src->bWithAironetIE; 2353 dst->bCkipSupported = src->bCkipSupported; 2354 memcpy(dst->CcxRmState, src->CcxRmState, 2); 2355 dst->bCcxRmEnable = src->bCcxRmEnable; 2356 dst->MBssidMask = src->MBssidMask; 2357 dst->bMBssidValid = src->bMBssidValid; 2358 memcpy(dst->MBssid, src->MBssid, 6); 2359 dst->bWithCcxVerNum = src->bWithCcxVerNum; 2360 dst->BssCcxVerNumber = src->BssCcxVerNumber; 2361 } 2362 2363 static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel) 2364 { 2365 if (channel > MAX_CHANNEL_NUMBER) { 2366 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__); 2367 return 0; 2368 } 2369 2370 if (rtllib->active_channel_map[channel] == 2) 2371 return 1; 2372 2373 return 0; 2374 } 2375 2376 int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel) 2377 { 2378 if (channel > MAX_CHANNEL_NUMBER) { 2379 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__); 2380 return 0; 2381 } 2382 if (rtllib->active_channel_map[channel] > 0) 2383 return 1; 2384 2385 return 0; 2386 } 2387 EXPORT_SYMBOL(rtllib_legal_channel); 2388 2389 static inline void rtllib_process_probe_response( 2390 struct rtllib_device *ieee, 2391 struct rtllib_probe_response *beacon, 2392 struct rtllib_rx_stats *stats) 2393 { 2394 struct rtllib_network *target; 2395 struct rtllib_network *oldest = NULL; 2396 struct rtllib_info_element *info_element = &beacon->info_element[0]; 2397 unsigned long flags; 2398 short renew; 2399 struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network), 2400 GFP_ATOMIC); 2401 __le16 frame_ctl = beacon->header.frame_control; 2402 2403 if (!network) 2404 return; 2405 2406 netdev_dbg(ieee->dev, 2407 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n", 2408 escape_essid(info_element->data, info_element->len), 2409 beacon->header.addr3, 2410 (le16_to_cpu(beacon->capability) & (1 << 0xf)) ? '1' : '0', 2411 (le16_to_cpu(beacon->capability) & (1 << 0xe)) ? '1' : '0', 2412 (le16_to_cpu(beacon->capability) & (1 << 0xd)) ? '1' : '0', 2413 (le16_to_cpu(beacon->capability) & (1 << 0xc)) ? '1' : '0', 2414 (le16_to_cpu(beacon->capability) & (1 << 0xb)) ? '1' : '0', 2415 (le16_to_cpu(beacon->capability) & (1 << 0xa)) ? '1' : '0', 2416 (le16_to_cpu(beacon->capability) & (1 << 0x9)) ? '1' : '0', 2417 (le16_to_cpu(beacon->capability) & (1 << 0x8)) ? '1' : '0', 2418 (le16_to_cpu(beacon->capability) & (1 << 0x7)) ? '1' : '0', 2419 (le16_to_cpu(beacon->capability) & (1 << 0x6)) ? '1' : '0', 2420 (le16_to_cpu(beacon->capability) & (1 << 0x5)) ? '1' : '0', 2421 (le16_to_cpu(beacon->capability) & (1 << 0x4)) ? '1' : '0', 2422 (le16_to_cpu(beacon->capability) & (1 << 0x3)) ? '1' : '0', 2423 (le16_to_cpu(beacon->capability) & (1 << 0x2)) ? '1' : '0', 2424 (le16_to_cpu(beacon->capability) & (1 << 0x1)) ? '1' : '0', 2425 (le16_to_cpu(beacon->capability) & (1 << 0x0)) ? '1' : '0'); 2426 2427 if (rtllib_network_init(ieee, beacon, network, stats)) { 2428 netdev_dbg(ieee->dev, "Dropped '%s' ( %pM) via %s.\n", 2429 escape_essid(info_element->data, info_element->len), 2430 beacon->header.addr3, 2431 ieee80211_is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE"); 2432 goto free_network; 2433 } 2434 2435 if (!rtllib_legal_channel(ieee, network->channel)) 2436 goto free_network; 2437 2438 if (ieee80211_is_probe_resp(frame_ctl)) { 2439 if (IsPassiveChannel(ieee, network->channel)) { 2440 netdev_info(ieee->dev, 2441 "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", 2442 network->channel); 2443 goto free_network; 2444 } 2445 } 2446 2447 /* The network parsed correctly -- so now we scan our known networks 2448 * to see if we can find it in our list. 2449 * 2450 * NOTE: This search is definitely not optimized. Once its doing 2451 * the "right thing" we'll optimize it for efficiency if 2452 * necessary 2453 */ 2454 2455 /* Search for this entry in the list and update it if it is 2456 * already there. 2457 */ 2458 2459 spin_lock_irqsave(&ieee->lock, flags); 2460 if (is_same_network(&ieee->current_network, network, 2461 (network->ssid_len ? 1 : 0))) { 2462 update_network(ieee, &ieee->current_network, network); 2463 if ((ieee->current_network.mode == WIRELESS_MODE_N_24G || 2464 ieee->current_network.mode == WIRELESS_MODE_G) && 2465 ieee->current_network.berp_info_valid) { 2466 if (ieee->current_network.erp_value & ERP_UseProtection) 2467 ieee->current_network.buseprotection = true; 2468 else 2469 ieee->current_network.buseprotection = false; 2470 } 2471 if (ieee80211_is_beacon(frame_ctl)) { 2472 if (ieee->link_state >= MAC80211_LINKED) 2473 ieee->link_detect_info.NumRecvBcnInPeriod++; 2474 } 2475 } 2476 list_for_each_entry(target, &ieee->network_list, list) { 2477 if (is_same_network(target, network, 2478 (target->ssid_len ? 1 : 0))) 2479 break; 2480 if (!oldest || (target->last_scanned < oldest->last_scanned)) 2481 oldest = target; 2482 } 2483 2484 /* If we didn't find a match, then get a new network slot to initialize 2485 * with this beacon's information 2486 */ 2487 if (&target->list == &ieee->network_list) { 2488 if (list_empty(&ieee->network_free_list)) { 2489 /* If there are no more slots, expire the oldest */ 2490 list_del(&oldest->list); 2491 target = oldest; 2492 netdev_dbg(ieee->dev, 2493 "Expired '%s' ( %pM) from network list.\n", 2494 escape_essid(target->ssid, target->ssid_len), 2495 target->bssid); 2496 } else { 2497 /* Otherwise just pull from the free list */ 2498 target = list_entry(ieee->network_free_list.next, 2499 struct rtllib_network, list); 2500 list_del(ieee->network_free_list.next); 2501 } 2502 2503 netdev_dbg(ieee->dev, "Adding '%s' ( %pM) via %s.\n", 2504 escape_essid(network->ssid, network->ssid_len), 2505 network->bssid, 2506 ieee80211_is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE"); 2507 2508 memcpy(target, network, sizeof(*target)); 2509 list_add_tail(&target->list, &ieee->network_list); 2510 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) 2511 rtllib_softmac_new_net(ieee, network); 2512 } else { 2513 netdev_dbg(ieee->dev, "Updating '%s' ( %pM) via %s.\n", 2514 escape_essid(target->ssid, target->ssid_len), 2515 target->bssid, 2516 ieee80211_is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE"); 2517 2518 /* we have an entry and we are going to update it. But this 2519 * entry may be already expired. In this case we do the same 2520 * as we found a new net and call the new_net handler 2521 */ 2522 renew = !time_after(target->last_scanned + ieee->scan_age, 2523 jiffies); 2524 if ((!target->ssid_len) && 2525 (((network->ssid_len > 0) && (target->hidden_ssid_len == 0)) 2526 || ((ieee->current_network.ssid_len == network->ssid_len) && 2527 (strncmp(ieee->current_network.ssid, network->ssid, 2528 network->ssid_len) == 0) && 2529 (ieee->link_state == MAC80211_NOLINK)))) 2530 renew = 1; 2531 update_network(ieee, target, network); 2532 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)) 2533 rtllib_softmac_new_net(ieee, network); 2534 } 2535 2536 spin_unlock_irqrestore(&ieee->lock, flags); 2537 if (ieee80211_is_beacon(frame_ctl) && 2538 is_same_network(&ieee->current_network, network, 2539 (network->ssid_len ? 1 : 0)) && 2540 (ieee->link_state == MAC80211_LINKED)) { 2541 ieee->handle_beacon(ieee->dev, beacon, &ieee->current_network); 2542 } 2543 free_network: 2544 kfree(network); 2545 } 2546 2547 static void rtllib_rx_mgt(struct rtllib_device *ieee, 2548 struct sk_buff *skb, 2549 struct rtllib_rx_stats *stats) 2550 { 2551 struct ieee80211_hdr *header = (struct ieee80211_hdr *)skb->data; 2552 2553 if (!ieee80211_is_probe_resp(header->frame_control) && 2554 (!ieee80211_is_beacon(header->frame_control))) 2555 ieee->last_rx_ps_time = jiffies; 2556 2557 if (ieee80211_is_beacon(header->frame_control)) { 2558 netdev_dbg(ieee->dev, "received BEACON\n"); 2559 rtllib_process_probe_response( 2560 ieee, (struct rtllib_probe_response *)header, 2561 stats); 2562 2563 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED && 2564 ieee->iw_mode == IW_MODE_INFRA && 2565 ieee->link_state == MAC80211_LINKED)) 2566 schedule_work(&ieee->ps_task); 2567 } else if (ieee80211_is_probe_resp(header->frame_control)) { 2568 netdev_dbg(ieee->dev, "received PROBE RESPONSE\n"); 2569 rtllib_process_probe_response(ieee, 2570 (struct rtllib_probe_response *)header, stats); 2571 } 2572 } 2573